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Agatha Christie

Dame Agatha Mary Clarissa Christie, Lady Mallowan, (; 15 September 1890 – 12 January 1976) was an English writer known for her 66 detective novels and 14 short story collections, particularly those revolving around fictional detectives Hercule Poirot and Miss Marple. She also wrote the world's longest-running play, the murder mystery The Mousetrap, which has been performed in the West End since 1952. A writer during the "Golden Age of Detective Fiction", Christie has been called the "Queen of Crime". She also wrote six novels under the pseudonym Mary Westmacott. In 1971, she was made a Dame (DBE) by Queen Elizabeth II for her contributions to literature. Guinness World Records lists Christie as the best-selling fiction writer of all time, her novels having sold more than two billion copies. Christie was born into a wealthy upper-middle-class family in Torquay, Devon, and was largely home-schooled. She was initially an unsuccessful writer with six consecutive rejections, but this changed in 1920 when The Mysterious Affair at Styles, featuring detective Hercule Poirot, was published. Her first husband was Archibald Christie; they married in 1914 and had one child before divorcing in 1928. Following the breakdown of her marriage and the death of her mother in 1926 she made international headlines by going missing for eleven days. During both World Wars, she served in hospital dispensaries, acquiring a thorough knowledge of the poisons that featured in many of her novels, short stories, and plays. Following her marriage to archaeologist Max Mallowan in 1930, she spent several months each year on digs in the Middle East and used her first-hand knowledge of this profession in her fiction. According to UNESCO's Index Translationum, she remains the most-translated individual author. Her novel And Then There Were None is one of the top-selling books of all time, with approximately 100 million copies sold. Christie's stage play The Mousetrap holds the world record for the longest initial run. It opened at the Ambassadors Theatre in the West End on 25 November 1952, and by 2018 there had been more than 27,500 performances. The play was temporarily closed in 2020 because of COVID-19 lockdowns in London before it reopened in 2021. In 1955, Christie was the first recipient of the Mystery Writers of America's Grand Master Award. Later that year, Witness for the Prosecution received an Edgar Award for best play. In 2013, she was voted the best crime writer and The Murder of Roger Ackroyd the best crime novel ever by 600 professional novelists of the Crime Writers' Association. In 2015, And Then There Were None was named the "World's Favourite Christie" in a vote sponsored by the author's estate. Many of Christie's books and short stories have been adapted for television, radio, video games, and graphic novels. More than 30 feature films are based on her work. Life and career Childhood and adolescence: 1890–1907 Agatha Mary Clarissa Miller was born on 15 September 1890, into a wealthy upper middle class family in Torquay, Devon. She was the youngest of three children born to Frederick Alvah Miller, "a gentleman of substance", and his wife Clarissa Margaret "Clara" Miller, née Boehmer. Christie's mother Clara was born in Dublin in 1854 to British Army officer Frederick Boehmer and his wife Mary Ann Boehmer (née West). Boehmer died in Jersey in 1863, leaving his widow to raise Clara and her brothers on a meagre income. Two weeks after Boehmer's death, Mary's sister Margaret West married widowed dry goods merchant Nathaniel Frary Miller, a US citizen. To assist Mary financially, they agreed to foster nine-year-old Clara; the family settled in Timperley, Cheshire. Margaret and Nathaniel had no children together, but Nathaniel had a 17-year-old son, Fred Miller, from his previous marriage. Fred was born in New York City and travelled extensively after leaving his Swiss boarding school. He and Clara were married in London in 1878. Their first child, Margaret Frary ("Madge"), was born in Torquay in 1879. The second, Louis Montant ("Monty"), was born in Morristown, New Jersey, in 1880, while the family was on an extended visit to the United States. When Fred's father died in 1869, he left Clara £2,000 (approximately ); in 1881 they used this to buy the leasehold of a villa in Torquay named Ashfield. It was here that their third and last child, Agatha, was born in 1890. She described her childhood as "very happy". The Millers lived mainly in Devon but often visited her step-grandmother/great-aunt Margaret Miller in Ealing and maternal grandmother Mary Boehmer in Bayswater. A year was spent abroad with her family, in the French Pyrenees, Paris, Dinard, and Guernsey. Because her siblings were so much older, and there were few children in their neighbourhood, Christie spent much of her time playing alone with her pets and imaginary companions. She eventually made friends with other girls in Torquay, noting that "one of the highlights of my existence" was her appearance with them in a youth production of Gilbert and Sullivan's The Yeomen of the Guard, in which she played the hero, Colonel Fairfax. According to Christie, Clara believed she should not learn to read until she was eight; thanks to her curiosity, she was reading by the age of four. Her sister had been sent to a boarding school, but their mother insisted that Christie receive her education at home. As a result, her parents and sister supervised her studies in reading, writing and basic arithmetic, a subject she particularly enjoyed. They also taught her music, and she learned to play the piano and the mandolin. Christie was a voracious reader from an early age. Among her earliest memories were of reading children's books by Mrs Molesworth and Edith Nesbit. When a little older, she moved on to the surreal verse of Edward Lear and Lewis Carroll. As an adolescent, she enjoyed works by Anthony Hope, Walter Scott, Charles Dickens, and Alexandre Dumas. In April 1901, aged 10, she wrote her first poem, "The Cow Slip". By 1901, her father's health had deteriorated, because of what he believed were heart problems. Fred died in November 1901 from pneumonia and chronic kidney disease. Christie later said that her father's death when she was 11 marked the end of her childhood. The family's financial situation had, by this time, worsened. Madge married the year after their father's death and moved to Cheadle, Cheshire; Monty was overseas, serving in a British regiment. Christie now lived alone at Ashfield with her mother. In 1902, she began attending Miss Guyer's Girls' School in Torquay but found it difficult to adjust to the disciplined atmosphere. In 1905, her mother sent her to Paris, where she was educated in a series of (boarding schools), focusing on voice training and piano playing. Deciding she lacked the temperament and talent, she gave up her goal of performing professionally as a concert pianist or an opera singer. Early literary attempts, marriage, literary success: 1907–1926 After completing her education, Christie returned to England to find her mother ailing. They decided to spend the northern winter of 1907–1908 in the warm climate of Egypt, which was then a regular tourist destination for wealthy Britons. They stayed for three months at the Gezirah Palace Hotel in Cairo. Christie attended many dances and other social functions; she particularly enjoyed watching amateur polo matches. While they visited some ancient Egyptian monuments such as the Great Pyramid of Giza, she did not exhibit the great interest in archaeology and Egyptology that developed in her later years. Returning to Britain, she continued her social activities, writing and performing in amateur theatrics. She also helped put on a play called The Blue Beard of Unhappiness with female friends. At 18, Christie wrote her first short story, "The House of Beauty", while recovering in bed from an illness. It consisted of about 6,000 words about "madness and dreams", subjects of fascination for her. Her biographer Janet Morgan has commented that, despite "infelicities of style", the story was "compelling". (The story became an early version of her story "The House of Dreams".) Other stories followed, most of them illustrating her interest in spiritualism and the paranormal. These included "The Call of Wings" and "The Little Lonely God". Magazines rejected all her early submissions, made under pseudonyms (including Mac Miller, Nathaniel Miller, and Sydney West); some submissions were later revised and published under her real name, often with new titles. Around the same time, Christie began work on her first novel, Snow Upon the Desert. Writing under the pseudonym Monosyllaba, she set the book in Cairo and drew upon her recent experiences there. She was disappointed when the six publishers she contacted declined the work. Clara suggested that her daughter ask for advice from the successful novelist Eden Phillpotts, a family friend and neighbour, who responded to her enquiry, encouraged her writing, and sent her an introduction to his own literary agent, Hughes Massie, who also rejected Snow Upon the Desert but suggested a second novel. Meanwhile, Christie's social activities expanded, with country house parties, riding, hunting, dances, and roller skating. She had short-lived relationships with four men and an engagement to another. In October 1912, she was introduced to Archibald "Archie" Christie at a dance given by Lord and Lady Clifford at Ugbrooke, about from Torquay. The son of a barrister in the Indian Civil Service, Archie was a Royal Artillery officer who was seconded to the Royal Flying Corps in April 1913. The couple quickly fell in love. Three months after their first meeting, Archie proposed marriage, and Agatha accepted. With the outbreak of World War I in August 1914, Archie was sent to France to fight. They married on Christmas Eve 1914 at Emmanuel Church, Clifton, Bristol, close to the home of his mother and stepfather, when Archie was on home leave. Rising through the ranks, he was posted back to Britain in September 1918 as a colonel in the Air Ministry. Christie involved herself in the war effort as a member of the Voluntary Aid Detachment of the British Red Cross. From October 1914 to May 1915, then from June 1916 to September 1918, she worked 3,400 hours in the Town Hall Red Cross Hospital, Torquay, first as a nurse (unpaid) then as a dispenser at £16 (approximately ) a year from 1917 after qualifying as an apothecary's assistant. Her war service ended in September 1918 when Archie was reassigned to London, and they rented a flat in St. John's Wood. Christie had long been a fan of detective novels, having enjoyed Wilkie Collins's The Woman in White and The Moonstone, and Arthur Conan Doyle's early Sherlock Holmes stories. She wrote her first detective novel, The Mysterious Affair at Styles, in 1916. It featured Hercule Poirot, a former Belgian police officer with "magnificent moustaches" and a head "exactly the shape of an egg", who had taken refuge in Britain after Germany invaded Belgium. Christie's inspiration for the character came from Belgian refugees living in Torquay, and the Belgian soldiers she helped to treat as a volunteer nurse during the First World War. Her original manuscript was rejected by Hodder & Stoughton and Methuen. After keeping the submission for several months, John Lane at The Bodley Head offered to accept it, provided that Christie change how the solution was revealed. She did so, and signed a contract committing her next five books to The Bodley Head, which she later felt was exploitative. It was published in 1920. Christie settled into married life, giving birth to her only child, Rosalind Margaret Clarissa (later Hicks), in August 1919 at Ashfield. Archie left the Air Force at the end of the war and began working in the City financial sector on a relatively low salary. They still employed a maid. Her second novel, The Secret Adversary (1922), featured a new detective couple Tommy and Tuppence, again published by The Bodley Head. It earned her £50 (approximately ). A third novel, Murder on the Links, again featured Poirot, as did the short stories commissioned by Bruce Ingram, editor of The Sketch magazine, from 1923. She now had no difficulty selling her work. In 1922, the Christies joined an around-the-world promotional tour for the British Empire Exhibition, led by Major Ernest Belcher. Leaving their daughter with Agatha's mother and sister, in 10 months they travelled to South Africa, Australia, New Zealand, Hawaii, and Canada. They learned to surf prone in South Africa; then, in Waikiki, they were among the first Britons to surf standing up, and extended their time there by three months to practise. She is remembered at the British Surfing Museum as having said about surfing, "Oh it was heaven! Nothing like rushing through the water at what seems to you a speed of about two hundred miles an hour. It is one of the most perfect physical pleasures I have known." When they returned to England, Archie resumed work in the city, and Christie continued to work hard at her writing. After living in a series of apartments in London, they bought a house in Sunningdale, Berkshire, which they renamed Styles after the mansion in Christie's first detective novel. Christie's mother, Clarissa Miller, died in April 1926. They had been exceptionally close, and the loss sent Christie into a deep depression. In August 1926, reports appeared in the press that Christie had gone to a village near Biarritz to recuperate from a "breakdown" caused by "overwork". Disappearance: 1926 In August 1926, Archie asked Agatha for a divorce. He had fallen in love with Nancy Neele, a friend of Major Belcher. On 3December 1926, the pair quarrelled after Archie announced his plan to spend the weekend with friends, unaccompanied by his wife. Late that evening, Christie disappeared from their home in Sunningdale. The following morning, her car, a Morris Cowley, was discovered at Newlands Corner in Surrey, parked above a chalk quarry with an expired driving licence and clothes inside. It was feared that she might have drowned herself in the Silent Pool, a nearby beauty spot. The disappearance quickly became a news story, as the press sought to satisfy their readers' "hunger for sensation, disaster, and scandal". Home Secretary William Joynson-Hicks pressured police, and a newspaper offered a £100 reward (). More than a thousand police officers, 15,000 volunteers, and several aeroplanes searched the rural landscape. Sir Arthur Conan Doyle gave a spirit medium one of Christie's gloves to find her. Christie's disappearance made international headlines, including featuring on the front page of The New York Times. Despite the extensive manhunt, she was not found for another 10 days. On 14 December 1926, she was located at the Swan Hydropathic Hotel in Harrogate, Yorkshire, north of her home in Sunningdale, registered as "Mrs Tressa Neele" (the surname of her husband's lover) from " S.A." (South Africa). The next day, Christie left for her sister's residence at Abney Hall, Cheadle, where she was sequestered "in guarded hall, gates locked, telephone cut off, and callers turned away". Christie's autobiography makes no reference to the disappearance. Two doctors diagnosed her with "an unquestionable genuine loss of memory", yet opinion remains divided over the reason for her disappearance. Some, including her biographer Morgan, believe she disappeared during a fugue state. The author Jared Cade concluded that Christie planned the event to embarrass her husband but did not anticipate the resulting public melodrama. Christie biographer Laura Thompson provides an alternative view that Christie disappeared during a nervous breakdown, conscious of her actions but not in emotional control of herself. Public reaction at the time was largely negative, supposing a publicity stunt or an attempt to frame her husband for murder. Second marriage and later life: 1927–1976 In January 1927, Christie, looking "very pale", sailed with her daughter and secretary to Las Palmas, Canary Islands, to "complete her convalescence", returning three months later. Christie petitioned for divorce and was granted a decree nisi against her husband in April 1928, which was made absolute in October 1928. Archie married Nancy Neele a week later. Christie retained custody of their daughter, Rosalind, and kept the Christie surname for her writing. Reflecting on the period in her autobiography, Christie wrote, "So, after illness, came sorrow, despair and heartbreak. There is no need to dwell on it." In 1928, Christie left England and took the (Simplon) Orient Express to Istanbul and then to Baghdad. In Iraq, she became friends with archaeologist Leonard Woolley and his wife, who invited her to return to their dig in February 1930. On that second trip, she met archaeologist Max Mallowan, 13 years her junior. In a 1977 interview, Mallowan recounted his first meeting with Christie, when he took her and a group of tourists on a tour of his expedition site in Iraq. Christie and Mallowan married in Edinburgh in September 1930. Their marriage lasted until Christie's death in 1976. She accompanied Mallowan on his archaeological expeditions, and her travels with him contributed background to several of her novels set in the Middle East. Other novels (such as Peril at End House) were set in and around Torquay, where she was raised. Christie drew on her experience of international train travel when writing her 1934 novel Murder on the Orient Express. The Pera Palace Hotel in Istanbul, the eastern terminus of the railway, claims the book was written there and maintains Christie's room as a memorial to the author. Christie and Mallowan first lived in Cresswell Place in Chelsea, and later in Sheffield Terrace, Holland Park, Kensington. Both properties are now marked by blue plaques. In 1934, they bought Winterbrook House in Winterbrook, a hamlet near Wallingford. This was their main residence for the rest of their lives and the place where Christie did much of her writing. This house also bears a blue plaque. Christie led a quiet life despite being known in Wallingford; from 1951 to 1976 she served as president of the local amateur dramatic society. The couple acquired the Greenway Estate in Devon as a summer residence in 1938; it was given to the National Trust in 2000. Christie frequently stayed at Abney Hall, Cheshire, which was owned by her brother-in-law, James Watts, and based at least two stories there: a short story, "The Adventure of the Christmas Pudding", in the story collection of the same name and the novel After the Funeral. One Christie compendium notes that "Abney became Agatha's greatest inspiration for country-house life, with all its servants and grandeur being woven into her plots. The descriptions of the fictional Chimneys, Stonygates, and other houses in her stories are mostly Abney Hall in various forms." During World War II, Christie moved to London and lived in a flat at the Isokon in Hampstead, whilst working in the pharmacy at University College Hospital (UCH), London, where she updated her knowledge of poisons. Her later novel The Pale Horse was based on a suggestion from Harold Davis, the chief pharmacist at UCH. In 1977, a thallium poisoning case was solved by British medical personnel who had read Christie's book and recognised the symptoms she described. The British intelligence agency MI5 investigated Christie after a character called Major Bletchley appeared in her 1941 thriller N or M?, which was about a hunt for a pair of deadly fifth columnists in wartime England. MI5 was concerned that Christie had a spy in Britain's top-secret codebreaking centre, Bletchley Park. The agency's fears were allayed when Christie told her friend, the codebreaker Dilly Knox, "I was stuck there on my way by train from Oxford to London and took revenge by giving the name to one of my least lovable characters." Christie was elected a fellow of the Royal Society of Literature in 1950. In honour of her many literary works, Christie was appointed Commander of the Order of the British Empire (CBE) in the 1956 New Year Honours. She was co-president of the Detection Club from 1958 to her death in 1976. In 1961, she was awarded an honorary Doctor of Literature degree by the University of Exeter. In the 1971 New Year Honours, she was promoted to Dame Commander of the Order of the British Empire (DBE), three years after her husband had been knighted for his archaeological work. After her husband's knighthood, Christie could also be styled Lady Mallowan. From 1971 to 1974, Christie's health began to fail, but she continued to write. Her last novel was Postern of Fate in 1973. Textual analysis suggested that Christie may have begun to develop Alzheimer's disease or other dementia at about this time. Personal qualities In 1946, Christie said of herself: "My chief dislikes are crowds, loud noises, gramophones and cinemas. I dislike the taste of alcohol and do not like smoking. I do like sun, sea, flowers, travelling, strange foods, sports, concerts, theatres, pianos, and doing embroidery." Christie was a lifelong, "quietly devout" member of the Church of England, attended church regularly, and kept her mother's copy of The Imitation of Christ by her bedside. After her divorce, she stopped taking the sacrament of communion. The Agatha Christie Trust For Children was established in 1969, and shortly after Christie's death a charitable memorial fund was set up to "help two causes that she favoured: old people and young children". Christie's obituary in The Times notes that "she never cared much for the cinema, or for wireless and television." Further, Death and estate Death and burial Christie died peacefully on 12 January 1976 at age 85 from natural causes at her home at Winterbrook House. Upon her death, two West End theatresthe St. Martin's, where The Mousetrap was playing, and the Savoy, which was home to a revival of Murder at the Vicaragedimmed their outside lights in her honour. She was buried in the nearby churchyard of St Mary's, Cholsey, in a plot she had chosen with her husband 10 years previously. The simple funeral service was attended by about 20 newspaper and TV reporters, some having travelled from as far away as South America. Thirty wreaths adorned Christie's grave, including one from the cast of her long-running play The Mousetrap and one sent "on behalf of the multitude of grateful readers" by the Ulverscroft Large Print Book Publishers. Mallowan, who remarried in 1977, died in 1978 and was buried next to Christie. Estate and subsequent ownership of works Christie was unhappy about becoming "an employed wage slave", and for tax reasons set up a private company in 1955, Agatha Christie Limited, to hold the rights to her works. In about 1959 she transferred her 278-acre home, Greenway Estate, to her daughter, Rosalind Hicks. In 1968, when Christie was almost 80, she sold a 51% stake in Agatha Christie Limited (and the works it owned) to Booker Books (better known as Booker Author's Division), which by 1977 had increased its stake to 64%. Agatha Christie Limited still owns the worldwide rights for more than 80 of Christie's novels and short stories, 19 plays, and nearly 40 TV films. In the late 1950s, Christie had reputedly been earning around £100,000 (approximately ) per year. Christie sold an estimated 300 million books during her lifetime. At the time of her death in 1976, "she was the best-selling novelist in history." One estimate of her total earnings from more than a half-century of writing is $20 million (approximately $ million in ). As a result of her tax planning, her will left only £106,683 (approximately ) net, which went mostly to her husband and daughter along with some smaller bequests. Her remaining 36% share of Agatha Christie Limited was inherited by Hicks, who passionately preserved her mother's works, image, and legacy until her own death 28 years later. The family's share of the company allowed them to appoint 50% of the board and the chairman, and retain a veto over new treatments, updated versions, and republications of her works. In 2004, Hicks' obituary in The Telegraph noted that she had been "determined to remain true to her mother's vision and to protect the integrity of her creations" and disapproved of "merchandising" activities. Upon her death on 28 October 2004, the Greenway Estate passed to her son Mathew Prichard. After his stepfather's death in 2005, Prichard donated Greenway and its contents to the National Trust. Christie's family and family trusts, including great-grandson James Prichard, continue to own the 36% stake in Agatha Christie Limited, and remain associated with the company. In 2020, James Prichard was the company's chairman. Mathew Prichard also holds the copyright to some of his grandmother's later literary works including The Mousetrap. Christie's work continues to be developed in a range of adaptations. In 1998, Booker sold its shares in Agatha Christie Limited (at the time earning £2,100,000, approximately annual revenue) for £10,000,000 (approximately ) to Chorion, whose portfolio of authors' works included the literary estates of Enid Blyton and Dennis Wheatley. In February 2012, after a management buyout, Chorion began to sell off its literary assets. This included the sale of Chorion's 64% stake in Agatha Christie Limited to Acorn Media UK. In 2014, RLJ Entertainment Inc. (RLJE) acquired Acorn Media UK, renamed it Acorn Media Enterprises, and incorporated it as the RLJE UK development arm. In late February 2014, media reports stated that the BBC had acquired exclusive TV rights to Christie's works in the UK (previously associated with ITV) and made plans with Acorn's co-operation to air new productions for the 125th anniversary of Christie's birth in 2015. As part of that deal, the BBC broadcast Partners in Crime and And Then There Were None, both in 2015. Subsequent productions have included The Witness for the Prosecution but plans to televise Ordeal by Innocence at Christmas 2017 were delayed because of controversy surrounding one of the cast members. The three-part adaptation aired in April 2018. A three-part adaptation of The A.B.C. Murders starring John Malkovich and Rupert Grint began filming in June 2018 and was first broadcast in December 2018. A two-part adaptation of The Pale Horse was broadcast on BBC1 in February 2020. Death Comes as the End will be the next BBC adaptation. Since 2020, reissues of Christie's Miss Marple and Hercule Poirot novels by HarperCollins have removed "passages containing descriptions, insults or references to ethnicity". Works Works of fiction Hercule Poirot and Miss Marple Christie's first published book, The Mysterious Affair at Styles, was released in 1920 and introduced the detective Hercule Poirot, who appeared in 33 of her novels and more than 50 short stories. Over the years, Christie grew tired of Poirot, much as Doyle did with Sherlock Holmes. By the end of the 1930s, Christie wrote in her diary that she was finding Poirot "insufferable", and by the 1960s she felt he was "an egocentric creep". Thompson believes Christie's occasional antipathy to her creation is overstated, and points out that "in later life she sought to protect him against misrepresentation as powerfully as if he were her own flesh and blood". Unlike Doyle, she resisted the temptation to kill her detective off while he was still popular. She married off Poirot's "Watson", Captain Arthur Hastings, in an attempt to trim her cast commitments. Miss Jane Marple was introduced in a series of short stories that began publication in December 1927 and were subsequently collected under the title The Thirteen Problems. Marple was a genteel, elderly spinster who solved crimes using analogies to English village life. Christie said, "Miss Marple was not in any way a picture of my grandmother; she was far more fussy and spinsterish than my grandmother ever was", but her autobiography establishes a firm connection between the fictional character and Christie's step-grandmother Margaret Miller ("Auntie-Grannie") and her "Ealing cronies". Both Marple and Miller "always expected the worst of everyone and everything, and were, with almost frightening accuracy, usually proved right". Marple appeared in 12 novels and 20 stories. During the Second World War, Christie wrote two novels, Curtain and Sleeping Murder, featuring Hercule Poirot and Miss Marple, respectively. Both books were sealed in a bank vault, and she made over the copyrights by deed of gift to her daughter and her husband to provide each with a kind of insurance policy. Christie had a heart attack and a serious fall in 1974, after which she was unable to write. Her daughter authorised the publication of Curtain in 1975, and Sleeping Murder was published posthumously in 1976. These publications followed the success of the 1974 film version of Murder on the Orient Express. Shortly before the publication of Curtain, Poirot became the first fictional character to have an obituary in The New York Times, which was printed on page one on 6 August 1975. Christie never wrote a novel or short story featuring both Poirot and Miss Marple. In a recording discovered and released in 2008, Christie revealed the reason for this: "Hercule Poirot, a complete egoist, would not like being taught his business or having suggestions made to him by an elderly spinster lady. Hercule Poirota professional sleuthwould not be at home at all in Miss Marple's world." In 2013, the Christie family supported the release of a new Poirot story, The Monogram Murders, written by British author Sophie Hannah. Hannah later published three more Poirot mysteries, Closed Casket in 2016, The Mystery of Three Quarters in 2018., and The Killings at Kingfisher Hill in 2020. Formula and plot devices Christie has been called the "Duchess of Death", the "Mistress of Mystery", and the "Queen of Crime". Early in her career, a reporter noted that "her plots are possible, logical, and always new." According to Hannah, "At the start of each novel, she shows us an apparently impossible situation and we go mad wondering 'How can this be happening?' Then, slowly, she reveals how the impossible is not only possible but the only thing that could have happened." Christie developed her storytelling techniques during what has been called the "Golden Age" of detective fiction. Author Dilys Winn called Christie "the doyenne of Coziness", a sub-genre which "featured a small village setting, a hero with faintly aristocratic family connections, a plethora of red herrings and a tendency to commit homicide with sterling silver letter openers and poisons imported from Paraguay". At the end, in a Christie hallmark, the detective usually gathers the surviving suspects into one room, explains the course of their deductive reasoning, and reveals the guilty party; but there are exceptions where it is left to the guilty party to explain all (such as And Then There Were None and Endless Night). Christie did not limit herself to quaint English villagesthe action might take place on a small island (And Then There Were None), an aeroplane (Death in the Clouds), a train (Murder on the Orient Express), a steamship (Death on the Nile), a smart London flat (Cards on the Table), a resort in the West Indies (A Caribbean Mystery), or an archaeological dig (Murder in Mesopotamia)but the circle of potential suspects is usually closed and intimate: family members, friends, servants, business associates, fellow travellers. Stereotyped characters abound (the , the stolid policeman, the devoted servant, the dull colonel), but these may be subverted to stymie the reader; impersonations and secret alliances are always possible. There is always a motivemost often, money: "There are very few killers in Christie who enjoy murder for its own sake." Professor of Pharmacology Michael C. Gerald noted that "in over half her novels, one or more victims are poisoned, albeit not always to the full satisfaction of the perpetrator." Guns, knives, garrottes, tripwires, blunt instruments, and even a hatchet were also used, but "Christie never resorted to elaborate mechanical or scientific means to explain her ingenuity," according to John Curran, author and literary adviser to the Christie estate. Many of her clues are mundane objects: a calendar, a coffee cup, wax flowers, a beer bottle, a fireplace used during a heat wave. According to crime writer P. D. James, Christie was prone to making the unlikeliest character the guilty party. Alert readers could sometimes identify the culprit by identifying the least likely suspect. Christie mocked this insight in her foreword to Cards on the Table: "Spot the person least likely to have committed the crime and in nine times out of ten your task is finished. Since I do not want my faithful readers to fling away this book in disgust, I prefer to warn them beforehand that this is not that kind of book." On BBC Radio 4's Desert Island Discs in 2007, Brian Aldiss said Christie had told him she wrote her books up to the last chapter, then decided who the most unlikely suspect was, after which she would go back and make the necessary changes to "frame" that person. Based upon a study of her working notebooks, Curran describes how Christie would first create a cast of characters, choose a setting, and then produce a list of scenes in which specific clues would be revealed; the order of scenes would be revised as she developed her plot. Of necessity, the murderer had to be known to the author before the sequence could be finalised and she began to type or dictate the first draft of her novel. Much of the work, particularly dialogue, was done in her head before she put it on paper. In 2013, the 600 members of the Crime Writers' Association chose The Murder of Roger Ackroyd as "the best whodunit... ever written". Author Julian Symons observed, "In an obvious sense, the book fits within the conventions... The setting is a village deep within the English countryside, Roger Ackroyd dies in his study; there is a butler who behaves suspiciously... Every successful detective story in this period involved a deceit practised upon the reader, and here the trick is the highly original one of making the murderer the local doctor, who tells the story and acts as Poirot's Watson." Critic Sutherland Scott stated, "If Agatha Christie had made no other contribution to the literature of detective fiction she would still deserve our grateful thanks" for writing this novel. In September 2015, to mark her 125th birthday, And Then There Were None was named the "World's Favourite Christie" in a vote sponsored by the author's estate. The novel is emblematic of both her use of formula and her willingness to discard it. "And Then There Were None carries the 'closed society' type of murder mystery to extreme lengths," according to author Charles Osborne. It begins with the classic set-up of potential victim(s) and killer(s) isolated from the outside world, but then violates conventions. There is no detective involved in the action, no interviews of suspects, no careful search for clues, and no suspects gathered together in the last chapter to be confronted with the solution. As Christie herself said, "Ten people had to die without it becoming ridiculous or the murderer being obvious." Critics agreed she had succeeded: "The arrogant Mrs. Christie this time set herself a fearsome test of her own ingenuity... the reviews, not surprisingly, were without exception wildly adulatory." Character stereotypes and racism Christie included stereotyped descriptions of characters in her work, especially before 1945 (when such attitudes were more commonly expressed publicly), particularly in regard to Italians, Jews, and non-Europeans. For example, she described "men of Hebraic extraction, sallow men with hooked noses, wearing rather flamboyant jewellery" in the short story "The Soul of the Croupier" from the collection The Mysterious Mr Quin. In 1947, the Anti-Defamation League in the US sent an official letter of complaint to Christie's American publishers, Dodd, Mead and Company, regarding perceived antisemitism in her works. Christie's British literary agent later wrote to her US representative, authorising American publishers to "omit the word 'Jew' when it refers to an unpleasant character in future books." In The Hollow, published in 1946, one of the characters is described by another as "a Whitechapel Jewess with dyed hair and a voice like a corncrake ... a small woman with a thick nose, henna red and a disagreeable voice". To contrast with the more stereotyped descriptions, Christie portrayed some "foreign" characters as victims, or potential victims, at the hands of English malefactors, such as, respectively, Olga Seminoff (Hallowe'en Party) and Katrina Reiger (in the short story "How Does Your Garden Grow?"). Jewish characters are often seen as un-English (such as Oliver Manders in Three Act Tragedy), but they are rarely the culprits. In 2023, the Telegraph reported that several Agatha Christie novels have been edited to remove potentially offensive language, including insults and references to ethnicity. Poirot and Miss Marple mysteries written between 1920 and 1976 have had passages reworked or removed in new editions published by HarperCollins, in order to strip them of language and descriptions that modern audiences find offensive, especially those involving the characters Christie’s protagonists encounter outside the UK. Sensitivity readers had made the edits, which were evident in digital versions of the new editions, including the entire Miss Marple run and selected Poirot novels set to be released or that have been released since 2020. Other detectives In addition to Hercule Poirot and Miss Marple, Christie also created amateur detectives Thomas (Tommy) Beresford and his wife, Prudence "Tuppence" née Cowley, who appear in four novels and one collection of short stories published between 1922 and 1974. Unlike her other sleuths, the Beresfords were only in their early twenties when introduced in The Secret Adversary, and were allowed to age alongside their creator. She treated their stories with a lighter touch, giving them a "dash and verve" which was not universally admired by critics. Their last adventure, Postern of Fate, was Christie's last novel. Harley Quin was "easily the most unorthodox" of Christie's fictional detectives. Inspired by Christie's affection for the figures from the Harlequinade, the semi-supernatural Quin always works with an elderly, conventional man called Satterthwaite. The pair appear in 14 short stories, 12 of which were collected in 1930 as The Mysterious Mr. Quin. Mallowan described these tales as "detection in a fanciful vein, touching on the fairy story, a natural product of Agatha's peculiar imagination". Satterthwaite also appears in a novel, Three Act Tragedy, and a short story, "Dead Man's Mirror", both of which feature Poirot. Another of her lesser-known characters is Parker Pyne, a retired civil servant who assists unhappy people in an unconventional manner. The 12 short stories which introduced him, Parker Pyne Investigates (1934), are best remembered for "The Case of the Discontented Soldier", which features Ariadne Oliver, "an amusing and satirical self-portrait of Agatha Christie". Over the ensuing decades, Oliver reappeared in seven novels. In most of them she assists Poirot. Plays In 1928, Michael Morton adapted The Murder of Roger Ackroyd for the stage under the name of Alibi. The play enjoyed a respectable run, but Christie disliked the changes made to her work and, in future, preferred to write for the theatre herself. The first of her own stage works was Black Coffee, which received good reviews when it opened in the West End in late 1930. She followed this up with adaptations of her detective novels: And Then There Were None in 1943, Appointment with Death in 1945, and The Hollow in 1951. In the 1950s, "the theatre ... engaged much of Agatha's attention." She next adapted her short radio play into The Mousetrap, which premiered in the West End in 1952, produced by Peter Saunders and starring Richard Attenborough as the original Detective Sergeant Trotter. Her expectations for the play were not high; she believed it would run no more than eight months. The Mousetrap has long since made theatrical history as the world's longest-running play, staging its 27,500th performance in September 2018. The play temporarily closed in March 2020, when all UK theatres shut due to the coronavirus pandemic, before it re-opened on 17 May 2021. In 1953, she followed this with Witness for the Prosecution, whose Broadway production won the New York Drama Critics' Circle award for best foreign play of 1954 and earned Christie an Edgar Award from the Mystery Writers of America. Spider's Web, an original work written for actress Margaret Lockwood at her request, premiered in the West End in 1954 and was also a hit. Christie became the first female playwright to have three plays running simultaneously in London: The Mousetrap, Witness for the Prosecution and Spider's Web. She said, "Plays are much easier to write than books, because you can see them in your mind's eye, you are not hampered by all that description which clogs you so terribly in a book and stops you from getting on with what's happening." In a letter to her daughter, Christie said being a playwright was "a lot of fun!" As Mary Westmacott Christie published six mainstream novels under the name Mary Westmacott, a pseudonym which gave her the freedom to explore "her most private and precious imaginative garden". These books typically received better reviews than her detective and thriller fiction. Of the first, Giant's Bread published in 1930, a reviewer for The New York Times wrote, "...her book is far above the average of current fiction, in fact, comes well under the classification of a 'good book'. And it is only a satisfying novel that can claim that appellation." It was publicized from the very beginning that "Mary Westmacott" was a pen name of a well-known author, although the identity behind the pen name was kept secret; the dust jacket of Giant's Bread mentions that the author had previously written "under her real name...half a dozen books that have each passed the thirty thousand mark in sales." (In fact, though this was technically true, it disguised Christie's identity through understatement. By the publication of Giant's Bread, Christie had published 10 novels and two short story collections, all of which had sold considerably more than 30,000 copies.) After Christie's authorship of the first four Westmacott novels was revealed by a journalist in 1949, she wrote two more, the last in 1956. The other Westmacott titles are: Unfinished Portrait (1934), Absent in the Spring (1944), The Rose and the Yew Tree (1948), A Daughter's a Daughter (1952), and The Burden (1956). Non-fiction works Christie published a few non-fiction works. Come, Tell Me How You Live, about working on an archaeological dig, was drawn from her life with Mallowan. The Grand Tour: Around the World with the Queen of Mystery is a collection of correspondence from her 1922 Grand Tour of the British Empire, including South Africa, Australia, New Zealand, and Canada. Agatha Christie: An Autobiography was published posthumously in 1977 and adjudged the Best Critical/Biographical Work at the 1978 Edgar Awards. Titles Many of Christie's works from 1940 onward have titles drawn from literature, with the original context of the title typically printed as an epigraph. The inspirations for some of Christie's titles include: William Shakespeare's works: Sad Cypress, By the Pricking of My Thumbs, There is a Tide..., Absent in the Spring, and The Mousetrap, for example. Osborne notes that "Shakespeare is the writer most quoted in the works of Agatha Christie"; The Bible: Evil Under the Sun, The Burden, and The Pale Horse; Other works of literature: The Mirror Crack'd from Side to Side (from Tennyson's "The Lady of Shalott"), The Moving Finger (from Edward FitzGerald's translation of the Rubáiyát of Omar Khayyám), The Rose and the Yew Tree (from T. S. Eliot's Four Quartets), Postern of Fate (from James Elroy Flecker's "Gates of Damascus"), Endless Night (from William Blake's "Auguries of Innocence"), N or M? (from the Book of Common Prayer), and Come, Tell Me How You Live (from Lewis Carroll's Through the Looking-Glass). Christie biographer Gillian Gill said, "Christie's writing has the sparseness, the directness, the narrative pace, and the universal appeal of the fairy story, and it is perhaps as modern fairy stories for grown-up children that Christie's novels succeed." Reflecting a juxtaposition of innocence and horror, numerous Christie titles were drawn from well-known children's nursery rhymes: And Then There Were None (from "Ten Little Niggers", a rhyme also published as "Ten Little Indians", both of which were also used for the book's title in some printings), One, Two, Buckle My Shoe (from "One, Two, Buckle My Shoe"), Five Little Pigs (from "This Little Piggy"), Crooked House (from "There Was a Crooked Man"), A Pocket Full of Rye (from "Sing a Song of Sixpence"), Hickory Dickory Dock (from "Hickory Dickory Dock"), and Three Blind Mice (from "Three Blind Mice"). Critical reception Christie is regularly referred to as the "Queen of Crime"—which is now trademarked by the Christie estate—or "Queen of Mystery", and is considered a master of suspense, plotting, and characterisation. In 1955, she became the first recipient of the Mystery Writers of America's Grand Master Award. She was named "Best Writer of the Century" and the Hercule Poirot series of books was named "Best Series of the Century" at the 2000 Bouchercon World Mystery Convention. In 2013, she was voted "best crime writer" in a survey of 600 members of the Crime Writers' Association of professional novelists. However, the writer Raymond Chandler criticised the artificiality of her books, as did writer Julian Symons. The literary critic Edmund Wilson described her prose as banal and her characterisations as superficial. In 2011, Christie was named by the digital crime drama TV channel Alibi as the second most financially successful crime writer of all time in the United Kingdom, after James Bond author Ian Fleming, with total earnings around £100 million. In 2012, Christie was among the people selected by the artist Peter Blake to appear in a new version of his most famous work, the Beatles' Sgt. Pepper's Lonely Hearts Club Band album cover, "to celebrate the British cultural figures he most admires". On the record-breaking longevity of Christie's The Mousetrap which had marked its 60th anniversary in 2012, Stephen Moss in The Guardian wrote, "the play and its author are the stars". In 2015, marking the 125th anniversary of her birth date, 25 contemporary mystery writers and one publisher gave their views on Christie's works. Many of the authors had read Christie's novels first, before other mystery writers, in English or in their native language, influencing their own writing, and nearly all still viewed her as the "Queen of Crime" and creator of the plot twists used by mystery authors. Nearly all had one or more favourites among Christie's mysteries and found her books still good to read nearly 100 years after her first novel was published. Just one of the 25 authors held with Wilson's views. Book sales In her prime, Christie was rarely out of the bestseller list. She was the first crime writer to have 100,000 copies of 10 of her titles published by Penguin on the same day in 1948. , Guinness World Records listed Christie as the best-selling fiction writer of all time. , her novels had sold more than two billion copies in 44 languages. Half the sales are of English-language editions, and half are translations. According to Index Translationum, , she was the most-translated individual author. Christie is one of the most-borrowed authors in UK libraries. She is also the UK's best-selling spoken-book author. In 2002, 117,696 Christie audiobooks were sold, in comparison to 97,755 for J. K. Rowling, 78,770 for Roald Dahl and 75,841 for J. R. R. Tolkien. In 2015, the Christie estate claimed And Then There Were None was "the best-selling crime novel of all time", with approximately 100 million sales, also making it one of the highest-selling books of all time. More than two million copies of her books were sold in English in 2020. Legacy In 2016, the Royal Mail marked the centenary of Christie's first detective story by issuing six first-class postage stamps of her works: The Mysterious Affair at Styles, The Murder of Roger Ackroyd, Murder on the Orient Express, And Then There Were None, The Body in the Library, and A Murder is Announced. The Guardian reported that, "Each design incorporates microtext, UV ink and thermochromic ink. These concealed clues can be revealed using either a magnifying glass, UV light or body heat and provide pointers to the mysteries' solutions." Her characters and her face appeared on the stamps of many countries like Dominica and the Somali Republic. In 2020, Christie was commemorated on a £2 coin by the Royal Mint for the first time to mark the centenary of her first novel, The Mysterious Affair at Styles. In 2023 a life-size bronze statue of Christie sitting on a park bench holding a book was unveiled in Wallingford. Adaptations Christie's works have been adapted for cinema and television. The first was the 1928 British film The Passing of Mr. Quin. Poirot's first film appearance was in 1931 in Alibi, which starred Austin Trevor as Christie's sleuth. Margaret Rutherford played Marple in a series of films released in the 1960s. Christie liked her acting, but considered the first film "pretty poor" and thought no better of the rest. She felt differently about the 1974 film Murder on the Orient Express, directed by Sidney Lumet, which featured major stars and high production values; her attendance at the London premiere was one of her last public outings. In 2017, a new film version was released, directed by Kenneth Branagh, who also starred, wearing "the most extravagant mustache moviegoers have ever seen". The television adaptation Agatha Christie's Poirot (1989–2013), with David Suchet in the title role, ran for 70 episodes over 13 series. It received nine BAFTA award nominations and won four BAFTA awards in 1990–1992. The television series Miss Marple (1984–1992), with Joan Hickson as "the BBC's peerless Miss Marple", adapted all 12 Marple novels. The French television series (2009–2012, 2013–2020), adapted 36 of Christie's stories. Christie's books have also been adapted for BBC Radio, a video game series, and graphic novels. Interests and influences Pharmacology During the First World War, Christie took a break from nursing to train for the Apothecaries Hall Examination. While she subsequently found dispensing in the hospital pharmacy monotonous, and thus less enjoyable than nursing, her new knowledge provided her with a background in potentially toxic drugs. Early in the Second World War, she brought her skills up to date at Torquay Hospital. As Michael C. Gerald puts it, her "activities as a hospital dispenser during both World Wars not only supported the war effort but also provided her with an appreciation of drugs as therapeutic agents and poisons... These hospital experiences were also likely responsible for the prominent role physicians, nurses, and pharmacists play in her stories." There were to be many medical practitioners, pharmacists, and scientists, naïve or suspicious, in Christie's cast of characters; featuring in Murder in Mesopotamia, Cards on the Table, The Pale Horse, and Mrs. McGinty's Dead, among many others. Gillian Gill notes that the murder method in Christie's first detective novel, The Mysterious Affair at Styles, "comes right out of Agatha Christie's work in the hospital dispensary". In an interview with journalist Marcelle Bernstein, Christie stated, "I don't like messy deaths... I'm more interested in peaceful people who die in their own beds and no one knows why." With her expert knowledge, Christie had no need of poisons unknown to science, which were forbidden under Ronald Knox's "Ten Rules for Detective Fiction". Arsenic, aconite, strychnine, digitalis, nicotine, thallium, and other substances were used to dispatch victims in the ensuing decades. Archaeology In her youth, Christie showed little interest in antiquities. After her marriage to Mallowan in 1930, she accompanied him on annual expeditions, spending three to four months at a time in Syria and Iraq at excavation sites at Ur, Nineveh, Tell Arpachiyah, Chagar Bazar, Tell Brak, and Nimrud. The Mallowans also took side trips whilst travelling to and from expedition sites, visiting Italy, Greece, Egypt, Iran, and the Soviet Union, among other places. Their experiences travelling and living abroad are reflected in novels such as Murder on the Orient Express, Death on the Nile, and Appointment with Death. For the 1931 digging season at Nineveh, Christie bought a writing table to continue her own work; in the early 1950s, she paid to add a small writing room to the team's house at Nimrud. She also devoted time and effort each season in "making herself useful by photographing, cleaning, and recording finds; and restoring ceramics, which she especially enjoyed". She also provided funds for the expeditions. Many of the settings for Christie's books were inspired by her archaeological fieldwork in the Middle East; this is reflected in the detail with which she describes themfor instance, the temple of Abu Simbel as depicted in Death on the Nilewhile the settings for They Came to Baghdad were places she and Mallowan had recently stayed. Similarly, she drew upon her knowledge of daily life on a dig throughout Murder in Mesopotamia. Archaeologists and experts in Middle Eastern cultures and artefacts featured in her works include Dr Eric Leidner in Murder in Mesopotamia and Signor Richetti in Death on the Nile. After the Second World War, Christie chronicled her time in Syria in Come, Tell Me How You Live, which she described as "small beera very little book, full of everyday doings and happenings". From 8November 2001 to March 2002, The British Museum presented a "colourful and episodic exhibition" called Agatha Christie and Archaeology: Mystery in Mesopotamia which illustrated how her activities as a writer and as the wife of an archaeologist intertwined. In popular culture Some of Christie's fictional portrayals have explored and offered accounts of her disappearance in 1926. The film Agatha (1979), with Vanessa Redgrave, has Christie sneaking away to plan revenge against her husband; Christie's heirs sued unsuccessfully to prevent the film's distribution. The Doctor Who episode "The Unicorn and the Wasp" (17 May 2008) stars Fenella Woolgar as Christie, and explains her disappearance as being connected to aliens. The film Agatha and the Truth of Murder (2018) sends her undercover to solve the murder of Florence Nightingale's goddaughter, Florence Nightingale Shore. A fictionalised account of Christie's disappearance is also the central theme of a Korean musical, Agatha. The Christie Affair, a Christie-like mystery story of love and revenge by author Nina de Gramont, was a 2022 novel loosely based on Christie's disappearance. Other portrayals, such as the Hungarian film Kojak Budapesten (1980), create their own scenarios involving Christie's criminal skills. In the TV play Murder by the Book (1986), Christie (Dame Peggy Ashcroft) murders one of her fictional-turned-real characters, Poirot. Christie features as a character in Gaylord Larsen's Dorothy and Agatha and The London Blitz Murders by Max Allan Collins. The American television program Unsolved Mysteries devoted a segment to her famous disappearance, with Agatha portrayed by actress Tessa Pritchard. A young Agatha is depicted in the Spanish historical television series Gran Hotel (2011) in which she finds inspiration to write her new novel while aiding local detectives. In the alternative history television film Agatha and the Curse of Ishtar (2018), Christie becomes involved in a murder case at an archaeological dig in Iraq. In 2019, Honeysuckle Weeks portrayed Christie in an episode, "No Friends Like Old Friends", in a Canadian drama, Frankie Drake Mysteries. In 2020, Heather Terrell, under the pseudonym of Marie Benedict, published The Mystery of Mrs. Christie, a fictional reconstruction of Christie's December 1926 disappearance. The novel was on the USA Today and The New York Times Best Seller lists. In December 2020, Library Reads named Terrell a Hall of Fame author for the book. Andrew Wilson has written four novels featuring Agatha Christie as a detective: A Talent For Murder (2017), A Different Kind of Evil (2018), Death In A Desert Land (2019) and I Saw Him Die (2020). Christie was portrayed by Shirley Henderson in the 2022 comedy/mystery film See How They Run. See also Agatha Christie indult (an oecumenical request to which Christie was signatory seeking permission for the occasional use of the Tridentine (Latin) mass in England and Wales) Agatha Awards (literary awards for mystery and crime writers) Agatha Christie Award (Japan) (literary award for unpublished mystery novels) List of solved missing person cases Notes References Further reading . Bernthal, J.C. (2022). Agatha Christie: A Companion to the Mystery Fiction. Jefferson, NC: McFarland. . Curran, John (2009). Agatha Christie's Secret Notebooks: Fifty Years of Mysteries in the Making. London: HarperCollins. . Curran, John (2011). Agatha Christie: Murder in the Making. London: HarperCollins. . Curran, John. "75 facts about Christie". The Home of Agatha Christie. Agatha Christie Limited. Retrieved 21 July 2017. Gerald, Michael C. (1993). The Poisonous Pen of Agatha Christie. Austin, Texas: University of Texas Press. . . . . Morgan, Janet P. (1984). Agatha Christie: A Biography. London: HarperCollins. . Retrieved 8 March 2015. Prichard, Mathew (2012). The Grand Tour: Around The World With The Queen Of Mystery. New York, NY: HarperCollins. . . Thompson, Laura (2008), Agatha Christie: An English Mystery, London: Headline Review, . External links A Christie reading list (on official website) Agatha Christie/Sir Max Mallowan's blue plaque at Cholsey Agatha Christie profile on PBS.org Agatha Christie profile on FamousAuthors.org Agatha Christie recording, oral history at the Imperial War Museum Agatha Christie business papers at the University of Exeter "Shocking Real Murders" (book released to mark the 125th anniversary of Christie's birth) Hercule Poirot Central 1890 births 1976 deaths 20th-century English novelists 20th-century English dramatists and playwrights 20th-century English women writers 20th-century British short story writers 20th-century English memoirists Anthony Award winners Booker authors' division British autobiographers British detective fiction writers British women in World War I British women short story writers Burials in Oxfordshire Cozy mystery writers Dames Commander of the Order of the British Empire Ghost story writers Edgar Award winners English people of American descent English crime fiction writers English mystery writers English short story writers English women dramatists and playwrights English women novelists Fellows of the Royal Society of Literature Female nurses in World War I Female wartime nurses Formerly missing people Members of the Detection Club Missing person cases in England People from Cholsey People from Sunningdale Pseudonymous women writers Temporary disappearances Wives of knights Women mystery writers British women memoirists Women historical novelists Writers of historical mysteries Writers from Torquay 20th-century pseudonymous writers

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https://en.wikipedia.org/wiki/Analog%20signal

Analog signal

An analog signal is any continuous-time signal representing some other quantity, i.e., analogous to another quantity. For example, in an analog audio signal, the instantaneous signal voltage varies continuously with the pressure of the sound waves. In contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values. Digital sampling imposes some bandwidth and dynamic range constraints on the representation and adds quantization error. The term analog signal usually refers to electrical signals; however, mechanical, pneumatic, hydraulic, and other systems may also convey or be considered analog signals. Representation An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information. Any information may be conveyed by an analog signal; such a signal may be a measured response to changes in a physical variable, such as sound, light, temperature, position, or pressure. The physical variable is converted to an analog signal by a transducer. For example, sound striking the diaphragm of a microphone induces corresponding fluctuations in the current produced by a coil in an electromagnetic microphone or the voltage produced by a condenser microphone. The voltage or the current is said to be an analog of the sound. Noise An analog signal is subject to electronic noise and distortion introduced by communication channels, recording and signal processing operations, which can progressively degrade the signal-to-noise ratio (SNR). As the signal is transmitted, copied, or processed, the unavoidable noise introduced in the signal path will accumulate as a generation loss, progressively and irreversibly degrading the SNR, until in extreme cases, the signal can be overwhelmed. Noise can show up as hiss and intermodulation distortion in audio signals, or snow in video signals. Generation loss is irreversible as there is no reliable method to distinguish the noise from the signal. Converting an analog signal to digital form introduces a low-level quantization noise into the signal due to finite resolution of digital systems. Once in digital form, the signal can be transmitted, stored, and processed without introducing additional noise or distortion using error detection and correction. Noise accumulation in analog systems can be minimized by electromagnetic shielding, balanced lines, low-noise amplifiers and high-quality electrical components. See also Amplifier Analog computer Analog device Analog signal processing Magnetic tape Preamplifier References Analog circuits Electronic design Television terminology Video signal

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https://en.wikipedia.org/wiki/Hercule%20Poirot

Hercule Poirot

Hercule Poirot (, ) is a fictional Belgian detective created by British writer Agatha Christie. Poirot is one of Christie's most famous and long-running characters, appearing in 33 novels, two plays (Black Coffee and Alibi), and 51 short stories published between 1920 and 1975. Poirot has been portrayed on radio, in film and on television by various actors, including Austin Trevor, John Moffatt, Albert Finney, Peter Ustinov, Ian Holm, Tony Randall, Alfred Molina, Orson Welles, David Suchet, Kenneth Branagh, and John Malkovich. Overview Influences Poirot's name was derived from two other fictional detectives of the time: Marie Belloc Lowndes' Hercule Popeau and Frank Howel Evans' Monsieur Poiret, a retired French police officer living in London. Evans' Jules Poiret "was small and rather heavyset, hardly more than five feet, but moved with his head held high. The most remarkable features of his head were the stiff military moustache. His apparel was neat to perfection, a little quaint and frankly dandified." He was accompanied by Captain Harry Haven, who had returned to London from a Colombian business venture ended by a civil war. A more obvious influence on the early Poirot stories is that of Arthur Conan Doyle. In An Autobiography, Christie states, "I was still writing in the Sherlock Holmes tradition – eccentric detective, stooge assistant, with a Lestrade-type Scotland Yard detective, Inspector Japp". For his part, Conan Doyle acknowledged basing his detective stories on the model of Edgar Allan Poe's C. Auguste Dupin and his anonymous narrator, and basing his character Sherlock Holmes on Joseph Bell, who in his use of "ratiocination" prefigured Poirot's reliance on his "little grey cells". Poirot also bears a striking resemblance to A. E. W. Mason's fictional detective Inspector Hanaud of the French Sûreté, who first appeared in the 1910 novel At the Villa Rose and predates the first Poirot novel by 10 years. Christie's Poirot was clearly the result of her early development of the detective in her first book, written in 1916 and published in 1920. The large number of refugees in the country who had fled the German invasion of Belgium in August to November 1914 served as a plausible explanation of why such a skilled detective would be available to solve mysteries at an English country house. At the time of Christie's writing, it was considered patriotic to express sympathy towards the Belgians, since the invasion of their country had constituted Britain's casus belli for entering World War I, and British wartime propaganda emphasised the "Rape of Belgium". Popularity Poirot first appeared in The Mysterious Affair at Styles (published in 1920) and exited in Curtain (published in 1975). Following the latter, Poirot was the only fictional character to receive an obituary on the front page of The New York Times. By 1930, Agatha Christie found Poirot "insufferable", and by 1960 she felt that he was a "detestable, bombastic, tiresome, ego-centric little creep". Despite this, Poirot remained an exceedingly popular character with the general public. Christie later stated that she refused to kill him off, claiming that it was her duty to produce what the public liked. Appearance and proclivities Captain Arthur Hastings's first description of Poirot: Agatha Christie's initial description of Poirot in Murder on the Orient Express: In the later books, his limp is not mentioned, suggesting it may have been a temporary wartime injury. (In Curtain, Poirot admits he was wounded when he first came to England.) Poirot has green eyes that are repeatedly described as shining "like a cat's" when he is struck by a clever idea, and dark hair, which he dyes later in life. In Curtain, he admits to Hastings that he wears a wig and a false moustache. However, in many of his screen incarnations, he is bald or balding. Frequent mention is made of his patent leather shoes, damage to which is frequently a source of misery for him, but comical for the reader. Poirot's appearance, regarded as fastidious during his early career, later falls hopelessly out of fashion. Among Poirot's most significant personal attributes is the sensitivity of his stomach: He suffers from sea sickness, and, in Death in the Clouds, he states that his air sickness prevents him from being more alert at the time of the murder. Later in his life, we are told: Poirot is extremely punctual and carries a pocket watch almost to the end of his career. He is also particular about his personal finances, preferring to keep a bank balance of 444 pounds, 4 shillings, and 4 pence. Actor David Suchet, who portrayed Poirot on television, said "there's no question he's obsessive-compulsive". Film portrayer Kenneth Branagh said that he "enjoyed finding the sort of obsessive-compulsive" in Poirot. As mentioned in Curtain and The Clocks, he is fond of classical music, particularly Mozart and Bach. Methods In The Mysterious Affair at Styles, Poirot operates as a fairly conventional, clue-based and logical detective; reflected in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Hastings is irritated by the fact that Poirot sometimes conceals important details of his plans, as in The Big Four. In this novel, Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels, partly because there is rarely a narrator to mislead. In Murder on the Links, still largely dependent on clues himself, Poirot mocks a rival "bloodhound" detective who focuses on the traditional trail of clues established in detective fiction (e.g., Sherlock Holmes depending on footprints, fingerprints, and cigar ash). From this point on, Poirot establishes his psychological bona fides. Rather than painstakingly examining crime scenes, he enquires into the nature of the victim or the psychology of the murderer. He predicates his actions in the later novels on his underlying assumption that particular crimes are committed by particular types of people. Poirot focuses on getting people to talk. In the early novels, he casts himself in the role of "Papa Poirot", a benign confessor, especially to young women. In later works, Christie made a point of having Poirot supply false or misleading information about himself or his background to assist him in obtaining information. In The Murder of Roger Ackroyd, Poirot speaks of a non-existent mentally disabled nephew to uncover information about homes for the mentally unfit. In Dumb Witness, Poirot invents an elderly invalid mother as a pretence to investigate local nurses. In The Big Four, Poirot pretends to have (and poses as) an identical twin brother named Achille: however, this brother was mentioned again in The Labours of Hercules. "If I remember rightly – though my memory isn't what it was – you also had a brother called Achille, did you not?" Poirot's mind raced back over the details of Achille Poirot's career. Had all that really happened? "Only for a short space of time," he replied. Poirot is also willing to appear more foreign or vain in an effort to make people underestimate him. He admits as much: It is true that I can speak the exact, the idiomatic English. But, my friend, to speak the broken English is an enormous asset. It leads people to despise you. They say – a foreigner – he can't even speak English properly. ... Also I boast! An Englishman he says often, "A fellow who thinks as much of himself as that cannot be worth much." ... And so, you see, I put people off their guard. He also has a tendency to refer to himself in the third person. In later novels, Christie often uses the word mountebank when characters describe Poirot, showing that he has successfully passed himself off as a charlatan or fraud. Poirot's investigating techniques assist him solving cases; "For in the long run, either through a lie, or through truth, people were bound to give themselves away..." At the end, Poirot usually reveals his description of the sequence of events and his deductions to a room of suspects, often leading to the culprit's apprehension. Life Origins Christie was purposely vague about Poirot's origins, as he is thought to be an elderly man even in the early novels. In An Autobiography, she admitted that she already imagined him to be an old man in 1920. At the time, however, she did not know that she would write works featuring him for decades to come. A brief passage in The Big Four provides original information about Poirot's birth or at least childhood in or near the town of Spa, Belgium: "But we did not go into Spa itself. We left the main road and wound into the leafy fastnesses of the hills, till we reached a little hamlet and an isolated white villa high on the hillside." Christie strongly implies that this "quiet retreat in the Ardennes" near Spa is the location of the Poirot family home. An alternative tradition holds that Poirot was born in the village of Ellezelles (province of Hainaut, Belgium). A few memorials dedicated to Hercule Poirot can be seen in the centre of this village. There appears to be no reference to this in Christie's writings, but the town of Ellezelles cherishes a copy of Poirot's birth certificate in a local memorial 'attesting' Poirot's birth, naming his father and mother as Jules-Louis Poirot and Godelieve Poirot. Christie wrote that Poirot is a Catholic by birth, but not much is described about his later religious convictions, except sporadic references to his "going to church" and occasional invocations of "le bon Dieu". Christie provides little information regarding Poirot's childhood, only mentioning in Three Act Tragedy that he comes from a large family with little wealth, and has at least one younger sister. Apart from French and English, Poirot is also fluent in German. Policeman Gustave ... was not a policeman. I have dealt with policemen all my life and I know. He could pass as a detective to an outsider but not to a man who was a policeman himself. — Hercule Poirot Hercule Poirot was active in the Brussels police force by 1893. Very little mention is made about this part of his life, but in "The Nemean Lion" (1939) Poirot refers to a Belgian case of his in which "a wealthy soap manufacturer ... poisoned his wife in order to be free to marry his secretary". As Poirot was often misleading about his past to gain information, the truthfulness of that statement is unknown; it does, however, scare off a would-be wife-killer. In the short story "The Chocolate Box" (1923), Poirot reveals to Captain Arthur Hastings an account of what he considers to be his only failure. Poirot admits that he has failed to solve a crime "innumerable" times: I have been called in too late. Very often another, working towards the same goal, has arrived there first. Twice I have been struck down with illness just as I was on the point of success. Nevertheless, he regards the 1893 case in "The Chocolate Box", as his only failure through his fault only. Again, Poirot is not reliable as a narrator of his personal history and there is no evidence that Christie sketched it out in any depth. During his police career, Poirot shot a man who was firing from a roof into the public below. In Lord Edgware Dies, Poirot reveals that he learned to read writing upside down during his police career. Around that time he met Xavier Bouc, director of the Compagnie Internationale des Wagons-Lits. Inspector Japp offers some insight into Poirot's career with the Belgian police when introducing him to a colleague: You've heard me speak of Mr Poirot? It was in 1904 he and I worked together – the Abercrombie forgery case – you remember he was run down in Brussels. Ah, those were the days Moosier. Then, do you remember "Baron" Altara? There was a pretty rogue for you! He eluded the clutches of half the police in Europe. But we nailed him in Antwerp – thanks to Mr. Poirot here. In The Double Clue, Poirot mentions that he was Chief of Police of Brussels, until "the Great War" (World War I) forced him to leave for England. Private detective I had called in at my friend Poirot's rooms to find him sadly overworked. So much had he become the rage that every rich woman who had mislaid a bracelet or lost a pet kitten rushed to secure the services of the great Hercule Poirot. During World War I, Poirot left Belgium for England as a refugee, although he returned a few times. On 16 July 1916 he again met his lifelong friend, Captain Arthur Hastings, and solved the first of his cases to be published, The Mysterious Affair at Styles. It is clear that Hastings and Poirot are already friends when they meet in Chapter 2 of the novel, as Hastings tells Cynthia that he has not seen him for "some years" (Agatha Christie's Poirot has Hastings reveal that they met on a shooting case where Hastings was a suspect). Particulars such as the date of 1916 for the case and that Hastings had met Poirot in Belgium, are given in Curtain: Poirot's Last Case, Chapter 1. After that case, Poirot apparently came to the attention of the British secret service and undertook cases for the British government, including foiling the attempted abduction of the Prime Minister. Readers were told that the British authorities had learned of Poirot's keen investigative ability from certain members of Belgium's royal family. After the war, Poirot became a private detective and began undertaking civilian cases. He moved into what became both his home and work address, Flat 203 at 56B Whitehaven Mansions. Hastings first visits the flat when he returns to England in June 1935 from Argentina in The A.B.C. Murders, Chapter 1. The TV programmes place this in Florin Court, Charterhouse Square, in the wrong part of London. According to Hastings, it was chosen by Poirot "entirely on account of its strict geometrical appearance and proportion" and described as the "newest type of service flat". (The Florin Court building was actually built in 1936, decades after Poirot fictionally moved in.) His first case in this period was "The Affair at the Victory Ball", which allowed Poirot to enter high society and begin his career as a private detective. Between the world wars, Poirot travelled all over Europe and the Middle East investigating crimes and solving murders. Most of his cases occurred during this time and he was at the height of his powers at this point in his life. In The Murder on the Links, the Belgian pits his grey cells against a French murderer. In the Middle East, he solved the cases Death on the Nile and Murder in Mesopotamia with ease and even survived An Appointment with Death. As he passed through Eastern Europe on his return trip, he solved The Murder on the Orient Express. However, he did not travel to Africa or Asia, probably to avoid seasickness. It is this villainous sea that troubles me! The mal de mer – it is horrible suffering! It was during this time he met the Countess Vera Rossakoff, a glamorous jewel thief. The history of the countess is, like Poirot's, steeped in mystery. She claims to have been a member of the Russian aristocracy before the Russian Revolution and suffered greatly as a result, but how much of that story is true is an open question. Even Poirot acknowledges that Rossakoff offered wildly varying accounts of her early life. Poirot later became smitten with the woman and allowed her to escape justice. It is the misfortune of small, precise men always to hanker after large and flamboyant women. Poirot had never been able to rid himself of the fatal fascination that the countess held for him. Although letting the countess escape was morally questionable, it was not uncommon. In The Nemean Lion, Poirot sided with the criminal, Miss Amy Carnaby, allowing her to evade prosecution by blackmailing his client Sir Joseph Hoggins, who, Poirot discovered, had plans to commit murder. Poirot even sent Miss Carnaby two hundred pounds as a final payoff prior to the conclusion of her dog kidnapping campaign. In The Murder of Roger Ackroyd, Poirot allowed the murderer to escape justice through suicide and then withheld the truth to spare the feelings of the murderer's relatives. In The Augean Stables, he helped the government to cover up vast corruption. In Murder on the Orient Express, Poirot allowed the murderers to go free after discovering that twelve different people participated in the murder, each one stabbing the victim in a darkened carriage after drugging him into unconsciousness so that there was no way for anyone to definitively determine which of them actually delivered the killing blow. The victim had committed a disgusting crime which led to the deaths of at least five people, and there was no question of his guilt, but he had been acquitted in America in a miscarriage of justice. Considering it poetic justice that twelve jurors had acquitted him and twelve people had stabbed him, Poirot produced an alternative sequence of events to explain the death involving an unknown additional passenger on the train, with the medical examiner agreeing to doctor his own report to support this theory. After his cases in the Middle East, Poirot returned to Britain. Apart from some of the so-called Labours of Hercules (see next section) he very rarely went abroad during his later career. He moved into Styles Court towards the end of his life. While Poirot was usually paid handsomely by clients, he was also known to take on cases that piqued his curiosity, although they did not pay well. Poirot shows a love of steam trains, which Christie contrasts with Hastings' love of autos: this is shown in The Plymouth Express, The Mystery of the Blue Train, Murder on the Orient Express, and The ABC Murders (in the TV series, steam trains are seen in nearly all of the episodes). Retirement That's the way of it. Just a case or two, just one case more – the Prima Donna's farewell performance won't be in it with yours, Poirot. Confusion surrounds Poirot's retirement. Most of the cases covered by Poirot's private detective agency take place before his retirement to attempt to grow larger marrows, at which time he solves The Murder of Roger Ackroyd. It has been said that the twelve cases related in The Labours of Hercules (1947) must refer to a different retirement, but the fact that Poirot specifically says that he intends to grow marrows indicates that these stories also take place before Roger Ackroyd, and presumably Poirot closed his agency once he had completed them. There is specific mention in "The Capture of Cerberus" of the twenty-year gap between Poirot's previous meeting with Countess Rossakoff and this one. If the Labours precede the events in Roger Ackroyd, then the Ackroyd case must have taken place around twenty years later than it was published, and so must any of the cases that refer to it. One alternative would be that having failed to grow marrows once, Poirot is determined to have another go, but this is specifically denied by Poirot himself. Also, in "The Erymanthian Boar", a character is said to have been turned out of Austria by the Nazis, implying that the events of The Labours of Hercules took place after 1937. Another alternative would be to suggest that the Preface to the Labours takes place at one date but that the labours are completed over a matter of twenty years. None of the explanations is especially attractive. In terms of a rudimentary chronology, Poirot speaks of retiring to grow marrows in Chapter 18 of The Big Four (1927) which places that novel out of published order before Roger Ackroyd. He declines to solve a case for the Home Secretary because he is retired in Chapter One of Peril at End House (1932). He has certainly retired at the time of Three Act Tragedy (1935) but he does not enjoy his retirement and repeatedly takes cases thereafter when his curiosity is engaged. He continues to employ his secretary, Miss Lemon, at the time of the cases retold in Hickory Dickory Dock and Dead Man's Folly, which take place in the mid-1950s. It is, therefore, better to assume that Christie provided no authoritative chronology for Poirot's retirement but assumed that he could either be an active detective, a consulting detective, or a retired detective as the needs of the immediate case required. One consistent element about Poirot's retirement is that his fame declines during it so that in the later novels he is often disappointed when characters (especially younger characters) recognise neither him nor his name: "I should, perhaps, Madame, tell you a little more about myself. I am Hercule Poirot." The revelation left Mrs Summerhayes unmoved. "What a lovely name," she said kindly. "Greek, isn't it?" Post–World War II Poirot is less active during the cases that take place at the end of his career. Beginning with Three Act Tragedy (1934), Christie had perfected during the inter-war years a subgenre of Poirot novel in which the detective himself spent much of the first third of the novel on the periphery of events. In novels such as Taken at the Flood, After the Funeral, and Hickory Dickory Dock, he is even less in evidence, frequently passing the duties of main interviewing detective to a subsidiary character. In Cat Among the Pigeons, Poirot's entrance is so late as to be almost an afterthought. Whether this was a reflection of his age or of Christie's distaste for him, is impossible to assess. Crooked House (1949) and Ordeal by Innocence (1957), which could easily have been Poirot novels, represent a logical endpoint of the general diminution of his presence in such works. Towards the end of his career, it becomes clear that Poirot's retirement is no longer a convenient fiction. He assumes a genuinely inactive lifestyle during which he concerns himself with studying famous unsolved cases of the past and reading detective novels. He even writes a book about mystery fiction in which he deals sternly with Edgar Allan Poe and Wilkie Collins. In the absence of a more appropriate puzzle, he solves such inconsequential domestic riddles as the presence of three pieces of orange peel in his umbrella stand. Poirot (and, it is reasonable to suppose, his creator) becomes increasingly bemused by the vulgarism of the up-and-coming generation's young people. In Hickory Dickory Dock, he investigates the strange goings-on in a student hostel, while in Third Girl (1966) he is forced into contact with the smart set of Chelsea youths. In the growing drug and pop culture of the sixties, he proves himself once again but has become heavily reliant on other investigators (especially the private investigator, Mr. Goby) who provide him with the clues that he can no longer gather for himself. Notably, during this time his physical characteristics also change dramatically, and by the time Arthur Hastings meets Poirot again in Curtain, he looks very different from his previous appearances, having become thin with age and with obviously dyed hair. Death On the ITV television series, Poirot died in October 1949 from complications of a heart condition at the end of Curtain: Poirot's Last Case. This took place at Styles Court, the scene of his first English case in 1916. In Christie's novels, he lived into the early 1970s, perhaps even until 1975 when Curtain was published. In both the novel and the television adaptation, he had moved his amyl nitrite pills out of his own reach, possibly because of guilt. He thereby became the murderer in Curtain, although it was for the benefit of others. Poirot himself noted that he wanted to kill his victim shortly before his own death so that he could avoid succumbing to the arrogance of the murderer, concerned that he might come to view himself as entitled to kill those whom he deemed necessary to eliminate. The "murderer" that he was hunting had never actually killed anyone, but he had manipulated others to kill for him, subtly and psychologically manipulating the moments where others desire to commit murder so that they carry out the crime when they might otherwise dismiss their thoughts as nothing more than a momentary passion. Poirot thus was forced to kill the man himself, as otherwise he would have continued his actions and never been officially convicted, as he did not legally do anything wrong. It is revealed at the end of Curtain that he fakes his need for a wheelchair to fool people into believing that he is suffering from arthritis, to give the impression that he is more infirm than he is. His last recorded words are "Cher ami!", spoken to Hastings as the Captain left his room. (The TV adaptation adds that as Poirot is dying alone, he whispers out his final prayer to God in these words: "Forgive me... forgive...") Poirot was buried at Styles, and his funeral was arranged by his best friend Hastings and Hastings' daughter Judith. Hastings reasoned, "Here was the spot where he had lived when he first came to this country. He was to lie here at the last." Poirot's actual death and funeral occurred in Curtain, years after his retirement from the active investigation, but it was not the first time that Hastings attended the funeral of his best friend. In The Big Four (1927), Poirot feigned his death and subsequent funeral to launch a surprise attack on the Big Four. Recurring characters Captain Arthur Hastings Hastings, a former British Army officer, meets Poirot during Poirot's years as a police officer in Belgium and almost immediately after they both arrive in England. He becomes Poirot's lifelong friend and appears in many cases. Poirot regards Hastings as a poor private detective, not particularly intelligent, yet helpful in his way of being fooled by the criminal or seeing things the way the average man would see them and for his tendency to unknowingly "stumble" onto the truth. Hastings marries and has four children – two sons and two daughters. As a loyal, albeit somewhat naïve companion, Hastings is to Poirot what Watson is to Sherlock Holmes. Hastings is capable of great bravery and courage, facing death unflinchingly when confronted by The Big Four and displaying unwavering loyalty towards Poirot. However, when forced to choose between Poirot and his wife in that novel, he initially chooses to betray Poirot to protect his wife. Later, though, he tells Poirot to draw back and escape the trap. The two are an airtight team until Hastings meets and marries Dulcie Duveen, a beautiful music hall performer half his age, after investigating the Murder on the Links. They later emigrated to Argentina, leaving Poirot behind as a "very unhappy old man". However, Poirot and Hastings reunite during the novels The Big Four, Peril at End House, The ABC Murders, Lord Edgware Dies, and Dumb Witness, when Hastings arrives in England for business, with Poirot noting in ABC Murders that he enjoys having Hastings over because he feels that he always has his most interesting cases with Hastings. The two collaborate for the final time in Curtain: Poirot's Last Case when the seemingly-crippled Poirot asks Hastings to assist him in his final case. When the killer they are tracking nearly manipulates Hastings into committing murder, Poirot describes this in his final farewell letter to Hastings as the catalyst that prompted him to eliminate the man himself, as Poirot knew that his friend was not a murderer and refused to let a man capable of manipulating Hastings in such a manner go on. Mrs Ariadne Oliver Detective novelist Ariadne Oliver is Agatha Christie's humorous self-caricature. Like Christie, she is not overly fond of the detective whom she is most famous for creating–in Ariadne's case, Finnish sleuth Sven Hjerson. We never learn anything about her husband, but we do know that she hates alcohol and public appearances and has a great fondness for apples until she is put off them by the events of Hallowe'en Party. She also has a habit of constantly changing her hairstyle, and in every appearance by her much is made of her clothes and hats. Her maid Maria prevents the public adoration from becoming too much of a burden on her employer but does nothing to prevent her from becoming too much of a burden on others. She has authored more than 56 novels and greatly dislikes people modifying her characters. She is the only one in Poirot's universe to have noted that "It's not natural for five or six people to be on the spot when B is murdered and all have a motive for killing B." She first met Poirot in the story Cards on the Table and has bothered him ever since. Miss Felicity Lemon Poirot's secretary, Miss Felicity Lemon, has few human weaknesses. The only mistakes she makes within the series are a typing error during the events of Hickory Dickory Dock and the mis-mailing of an electricity bill, although she was worried about strange events surrounding her sister who worked at a student hostel at the time. Poirot described her as being "Unbelievably ugly and incredibly efficient. Anything that she mentioned as worth consideration usually was worth consideration." She is an expert on nearly everything and plans to create the perfect filing system. She also worked for the government statistician-turned-philanthropist Parker Pyne. Whether this was during one of Poirot's numerous retirements or before she entered his employment is unknown. In The Agatha Christie Hour, she was portrayed by Angela Easterling, while in Agatha Christie's Poirot she was portrayed by Pauline Moran (where she was shown to be efficient, prim and modest, but not remotely "unbelievably ugly".) On a number of occasions, she joins Poirot in his inquiries or seeks out answers alone at his request. Chief Inspector James Harold Japp Japp is a Scotland Yard Inspector and appears in many of the stories trying to solve cases that Poirot is working on. Japp is outgoing, loud, and sometimes inconsiderate by nature, and his relationship with the refined Belgian is one of the stranger aspects of Poirot's world. He first met Poirot in Belgium in 1904, during the Abercrombie Forgery. Later that year they joined forces again to hunt down a criminal known as Baron Altara. They also meet in England where Poirot often helps Japp and lets him take credit in return for special favours. These favours usually entail Poirot being supplied with other interesting cases. In Agatha Christie's Poirot, Japp was portrayed by Philip Jackson. In the film, Thirteen at Dinner (1985), adapted from Lord Edgware Dies, the role of Japp was taken by the actor David Suchet, who would later star as Poirot in the ITV adaptations. Major novels The Poirot books take readers through the whole of his life in England, from the first book (The Mysterious Affair at Styles), where he is a refugee staying at Styles, to the last Poirot book (Curtain), where he visits Styles before his death. In between, Poirot solves cases outside England as well, including his most famous case, Murder on the Orient Express (1934). Hercule Poirot became famous in 1926 with the publication of The Murder of Roger Ackroyd, whose surprising solution proved controversial. The novel is still among the most famous of all detective novels: Edmund Wilson alludes to it in the title of his well-known attack on detective fiction, "Who Cares Who Killed Roger Ackroyd?" Aside from Roger Ackroyd, the most critically acclaimed Poirot novels appeared from 1932 to 1942, including Murder on the Orient Express (1934); The ABC Murders (1935); Cards on the Table (1936); and Death on the Nile (1937), a tale of multiple murders upon a Nile steamer. Death on the Nile was judged by the famed detective novelist John Dickson Carr to be among the ten greatest mystery novels of all time. The 1942 novel Five Little Pigs (a.k.a. Murder in Retrospect), in which Poirot investigates a murder committed sixteen years before by analysing various accounts of the tragedy, has been called "the best Christie of all" by critic and mystery novelist Robert Barnard. In 2014, the Poirot canon was added to by Sophie Hannah, the first author to be commissioned by the Christie estate to write an original story. The novel was called The Monogram Murders, and was set in the late 1920s, placing it chronologically between The Mystery of the Blue Train and Peril at End House. A second Hannah-penned Poirot came out in 2016, called Closed Casket, and a third, The Mystery of Three Quarters, in 2018. Portrayals Stage The first actor to portray Poirot was Charles Laughton. He appeared on the West End in 1928 in the play Alibi which had been adapted by Michael Morton from the novel The Murder of Roger Ackroyd. In 1932, the play was performed as The Fatal Alibi on Broadway. Another Poirot play, Black Coffee opened in London at the Embassy Theatre on 8 December 1930 and starred Francis L. Sullivan as Poirot. Another production of Black Coffee ran in Dublin, Ireland from 23 to 28 June 1931, starring Robert Powell. American playwright Ken Ludwig adapted Murder on the Orient Express into a play, which premiered at the McCarter Theatre in Princeton, New Jersey on 14 March 2017. It starred Allan Corduner in the role of Hercule Poirot. Film Austin Trevor Austin Trevor debuted the role of Poirot on screen in the 1931 British film Alibi. The film was based on the stage play. Trevor reprised the role of Poirot twice, in Black Coffee and Lord Edgware Dies. Trevor said once that he was probably cast as Poirot simply because he could do a French accent. Notably, Trevor's Poirot did not have a moustache. Leslie S. Hiscott directed the first two films, and Henry Edwards took over for the third. Tony Randall Tony Randall portrayed Poirot in The Alphabet Murders, a 1965 film also known as The ABC Murders. This was more a satire of Poirot than a straightforward adaptation and was greatly changed from the original. Much of the story, set in modern times, was played for comedy, with Poirot investigating the murders while evading the attempts by Hastings (Robert Morley) and the police to get him out of England and back to Belgium. Albert Finney Albert Finney played Poirot in 1974 in the cinematic version of Murder on the Orient Express. As of now, Finney is the only actor to receive an Academy Award nomination for playing Poirot, though he did not win. Peter Ustinov Peter Ustinov played Poirot six times, starting with Death on the Nile (1978). He reprised the role in Evil Under the Sun (1982) and Appointment with Death (1988). Christie's daughter Rosalind Hicks observed Ustinov during a rehearsal and said, "That's not Poirot! He isn't at all like that!" Ustinov overheard and remarked "He is now!" He appeared again as Poirot in three television films: Thirteen at Dinner (1985), Dead Man's Folly (1986), and Murder in Three Acts (1986). Earlier adaptations were set during the time in which the novels were written, but these television films were set in the contemporary era. The first of these was based on Lord Edgware Dies and was made by Warner Bros. It also starred Faye Dunaway, with David Suchet as Inspector Japp, just before Suchet began to play Poirot. David Suchet considers his performance as Japp to be "possibly the worst performance of [his] career". Kenneth Branagh Kenneth Branagh played Poirot in film adaptations of Murder on the Orient Express in 2017, Death on the Nile in 2022, and A Haunting in Venice, based on the novel Hallowe'en Party, in 2023. Branagh directed all three and co-produced them alongside Ridley Scott. They were written by Michael Green. Other Anatoly Ravikovich, Zagadka Endkhauza (End House Mystery) (1989; based on "Peril at End House") Television David Suchet David Suchet starred as Poirot in the ITV series Agatha Christie's Poirot from 1989 until June 2013, when he announced that he was bidding farewell to the role. "No one could've guessed then that the series would span a quarter-century or that the classically trained Suchet would complete the entire catalogue of whodunits featuring the eccentric Belgian investigator, including 33 novels and dozens of short stories." His final appearance in the show was in an adaptation of Curtain: Poirot's Last Case, aired on 13 November 2013. The writers of the "Binge!" article of Entertainment Weekly Issue #1343–44 (26 December 2014 – 3 January 2015) picked Suchet as "Best Poirot" in the "Hercule Poirot & Miss Marple" timeline. The episodes were shot in various locations in the UK and abroad (for example "Triangle at Rhodes" and "Problem at Sea"), whilst other scenes were shot at Twickenham Studios. Other Heini Göbel, (1955; an adaptation of Murder on the Orient Express for the West German television series Die Galerie der großen Detektive) José Ferrer, Hercule Poirot (1961; Unaired TV Pilot, MGM; adaptation of "The Disappearance of Mr. Davenheim") Martin Gabel, General Electric Theater (4/1/1962; adaptation of "The Disappearance of Mr. Davenheim") Horst Bollmann, Black Coffee 1973 Ian Holm, Murder by the Book, 1986 Arnolds Liniņš, Slepkavība Stailzā (The Mysterious Affair at Styles), 1990 Hugh Laurie, Spice World, 1997 Alfred Molina, Murder on the Orient Express, 2001 Konstantin Raikin, Neudacha Puaro (Poirot's Failure) (2002; based on "The Murder of Roger Ackroyd") Anthony O'Donnell, Agatha Christie: A Life in Pictures, 2004 Shirō Itō (Takashi Akafuji), Meitantei Akafuji Takashi (The Detective Takashi Akafuji), 2005 Mansai Nomura (Takeru Suguro), Orient Kyūkō Satsujin Jiken (Murder on the Orient Express), 2015; Kuroido Goroshi (The Murder of Kuroido), 2018 (based on "The Murder of Roger Ackroyd"); Shi to no Yakusoku, 2021 (based on Appointment with Death) John Malkovich was Poirot in the 2018 BBC adaptation of The ABC Murders. Anime In 2004, the Japanese public broadcaster NHK produced a 39-episode anime series titled Agatha Christie's Great Detectives Poirot and Marple, as well as a manga series under the same title released in 2005. The series, adapting several of the best-known Poirot and Marple stories, ran from 4 July 2004 through 15 May 2005, and in repeated reruns on NHK and other networks in Japan. Poirot was voiced by Kōtarō Satomi and Miss Marple was voiced by Kaoru Yachigusa. Radio From 1985 to 2007, BBC Radio 4 produced a series of twenty-seven adaptations of Poirot novels and short stories, adapted by Michael Bakewell and directed by Enyd Williams. Twenty five starred John Moffatt as Poirot; Maurice Denham and Peter Sallis played Poirot on BBC Radio 4 in the first two adaptations, The Mystery of the Blue Train and in Hercule Poirot's Christmas respectively. In 1939, Orson Welles and the Mercury Players dramatised Roger Ackroyd on CBS's Campbell Playhouse. On 6 October 1942, the Mutual radio series Murder Clinic broadcast "The Tragedy at Marsden Manor" starring Maurice Tarplin as Poirot. A 1945 radio series of at least 13 original half-hour episodes (none of which apparently adapt any Christie stories) transferred Poirot from London to New York and starred character actor Harold Huber, perhaps better known for his appearances as a police officer in various Charlie Chan films. On 22 February 1945, "speaking from London, Agatha Christie introduced the initial broadcast of the Poirot series via shortwave". An adaptation of Murder in the Mews was broadcast on the BBC Light Programme in March 1955 starring Richard Bebb as Poirot; this program was thought lost, but was discovered in the BBC archives in 2015. Other audio In 2017, Audible released an original audio adaptation of Murder on the Orient Express starring Tom Conti as Poirot. The cast included Jane Asher as Mrs. Hubbard, Jay Benedict as Monsieur Bouc, Ruta Gedmintas as Countess Andrenyi, Sophie Okonedo as Mary Debenham, Eddie Marsan as Ratchett, Walles Hamonde as Hector MacQueen, Paterson Joseph as Colonel Arbuthnot, Rula Lenska as Princess Dragimiroff and Art Malik as the Narrator. According to the Publisher's Summary on Audible.com, "sound effects [were] recorded on the Orient Express itself." In 2021, L.A. Theatre Works produced an adaptation of The Murder on the Links, dramatised by Kate McAll. Alfred Molina starred as Poirot, with Simon Helberg as Hastings. Video games The video game Agatha Christie - Hercule Poirot: The First Cases has Poirot voice acted by Will De Renzy-Martin. Parodies and references Parodies of Hercule Poirot have appeared in a number of movies, including Revenge of the Pink Panther, where Poirot makes a cameo appearance in a mental asylum, portrayed by Andrew Sachs and claiming to be "the greatest detective in all of France, the greatest in all the world"; Neil Simon's Murder by Death, where "Milo Perrier" is played by American actor James Coco; the 1977 film The Strange Case of the End of Civilization as We Know It (1977); the film Spice World, where Hugh Laurie plays Poirot; and in Sherlock Holmes: The Awakened, Poirot appears as a young boy on the train transporting Holmes and Watson. Holmes helps the boy in opening a puzzle-box, with Watson giving the boy advice about using his "little grey cells". In the book series Geronimo Stilton, the character Hercule Poirat is inspired by Hercule Poirot. The Belgian brewery Brasserie Ellezelloise makes a stout called Hercule with a moustachioed caricature of Hercule Poirot on the label. In season 2, episode 4 of TVFPlay's Indian web series Permanent Roommates, one of the characters refers to Hercule Poirot as her inspiration while she attempts to solve the mystery of the cheating spouse. Throughout the episode, she is mocked as Hercule Poirot and Agatha Christie by the suspects. TVFPlay also telecasted a spoof of Indian TV suspense drama CID as "Qissa Missing Dimaag Ka: C.I.D Qtiyapa". In the first episode, when Ujjwal is shown to browse for the best detectives of the world, David Suchet appears as Poirot in his search. See also Poirot Investigates Tropes in Agatha Christie's novels Footnotes References Literature Works Reviews Goddard, John (2018), Agatha Christie’s Golden Age: An Analysis of Poirot’s Golden Age Puzzles, Stylish Eye Press, . External links Official Agatha Christie website Hercule Poirot on IMDb Listen to Orson Welles in "The Murder of Roger Ackroyd" Listen to the 1945 Hercule Poirot radio program Wiktionary definition of Edgar Allan Poe's "ratiocination" Characters in British novels of the 20th century Fictional Belgian police officers Fictional Belgian police detectives Fictional Christians Fictional characters from Wallonia Fictional contract bridge players Fictional criminologists Fictional illeists Fictional private investigators Agatha Christie characters Hercule Poirot characters Literary characters introduced in 1920 Male characters in literature Series of books Hercule Poirot Hercule Poirot Hercule Poirot Hercule Poirot Hercule Poirot

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https://en.wikipedia.org/wiki/Alcohol%20%28chemistry%29

Alcohol (chemistry)

In chemistry, an alcohol is a type of organic compound that carries at least one hydroxyl () functional group bound to a saturated carbon atom. Alcohols range from the simple, like methanol and ethanol, to complex, like sucrose and cholesterol. The presence of an OH group strongly modifies the properties of hydrocarbons, conferring hydrophilic (water-loving) properties. The OH group provides a site at which many reactions can occur. History The flammable nature of the exhalations of wine was already known to ancient natural philosophers such as Aristotle (384–322 BCE), Theophrastus (–287 BCE), and Pliny the Elder (23/24–79 CE). However, this did not immediately lead to the isolation of alcohol, even despite the development of more advanced distillation techniques in second- and third-century Roman Egypt. An important recognition, first found in one of the writings attributed to Jābir ibn Ḥayyān (ninth century CE), was that by adding salt to boiling wine, which increases the wine's relative volatility, the flammability of the resulting vapors may be enhanced. The distillation of wine is attested in Arabic works attributed to al-Kindī (–873 CE) and to al-Fārābī (–950), and in the 28th book of al-Zahrāwī's (Latin: Abulcasis, 936–1013) Kitāb al-Taṣrīf (later translated into Latin as Liber servatoris). In the twelfth century, recipes for the production of aqua ardens ("burning water", i.e., alcohol) by distilling wine with salt started to appear in a number of Latin works, and by the end of the thirteenth century it had become a widely known substance among Western European chemists. The works of Taddeo Alderotti (1223–1296) describe a method for concentrating alcohol involving repeated fractional distillation through a water-cooled still, by which an alcohol purity of 90% could be obtained. The medicinal properties of ethanol were studied by Arnald of Villanova (1240–1311 CE) and John of Rupescissa (–1366), the latter of whom regarded it as a life-preserving substance able to prevent all diseases (the aqua vitae or "water of life", also called by John the quintessence of wine). Nomenclature Etymology The word "alcohol" derives from the Arabic kohl (), a powder used as an eyeliner. The first part of the word () is the Arabic definite article, equivalent to the in English. The second part of the word () has several antecedents in Semitic languages, ultimately deriving from the Akkadian (), meaning stibnite or antimony. Like its antecedents in Arabic and older languages, the term alcohol was originally used for the very fine powder produced by the sublimation of the natural mineral stibnite to form antimony trisulfide . It was considered to be the essence or "spirit" of this mineral. It was used as an antiseptic, eyeliner, and cosmetic. Later the meaning of alcohol was extended to distilled substances in general, and then narrowed again to ethanol, when "spirits" was a synonym for hard liquor. Paracelsus and Libavius both used the term alcohol to denote a fine powder, the latter speaking of an alcohol derived from antimony. At the same time Paracelsus uses the word for a volatile liquid; alcool or alcool vini occurs often in his writings. Bartholomew Traheron, in his 1543 translation of John of Vigo, introduces the word as a term used by "barbarous" authors for "fine powder." Vigo wrote: "the barbarous auctours use alcohol, or (as I fynde it sometymes wryten) alcofoll, for moost fine poudre." The 1657 Lexicon Chymicum, by William Johnson glosses the word as "antimonium sive stibium." By extension, the word came to refer to any fluid obtained by distillation, including "alcohol of wine," the distilled essence of wine. Libavius in Alchymia (1594) refers to "". Johnson (1657) glosses alcohol vini as "." The word's meaning became restricted to "spirit of wine" (the chemical known today as ethanol) in the 18th century and was extended to the class of substances so-called as "alcohols" in modern chemistry after 1850. The term ethanol was invented in 1892, blending "ethane" with the "-ol" ending of "alcohol", which was generalized as a libfix. The term alcohol originally referred to the primary alcohol ethanol (ethyl alcohol), which is used as a drug and is the main alcohol present in alcoholic drinks. The suffix -ol appears in the International Union of Pure and Applied Chemistry (IUPAC) chemical name of all substances where the hydroxyl group is the functional group with the highest priority. When a higher priority group is present in the compound, the prefix hydroxy- is used in its IUPAC name. The suffix -ol in non-IUPAC names (such as paracetamol or cholesterol) also typically indicates that the substance is an alcohol. However, some compounds that contain hydroxyl functional groups have trivial names which do not include the suffix -ol or the prefix hydroxy-, e.g. the sugars glucose and sucrose. Systematic names IUPAC nomenclature is used in scientific publications and where precise identification of the substance is important. In naming simple alcohols, the name of the alkane chain loses the terminal e and adds the suffix -ol, e.g., as in "ethanol" from the alkane chain name "ethane". When necessary, the position of the hydroxyl group is indicated by a number between the alkane name and the -ol: propan-1-ol for , propan-2-ol for . If a higher priority group is present (such as an aldehyde, ketone, or carboxylic acid), then the prefix hydroxy-is used, e.g., as in 1-hydroxy-2-propanone (). Compounds having more than one hydroxy group are called polyols. They are named using suffixes -diol, -triol, etc., following a list of the position numbers of the hydroxyl groups, as in propane-1,2-diol for CH3CH(OH)CH2OH (propylene glycol). In cases where the hydroxy group is bonded to an sp2 carbon on an aromatic ring, the molecule is classified separately as a phenol and is named using the IUPAC rules for naming phenols. Phenols have distinct properties and are not classified as alcohols. Common names In other less formal contexts, an alcohol is often called with the name of the corresponding alkyl group followed by the word "alcohol", e.g., methyl alcohol, ethyl alcohol. Propyl alcohol may be n-propyl alcohol or isopropyl alcohol, depending on whether the hydroxyl group is bonded to the end or middle carbon on the straight propane chain. As described under systematic naming, if another group on the molecule takes priority, the alcohol moiety is often indicated using the "hydroxy-" prefix. In archaic nomenclature, alcohols can be named as derivatives of methanol using "-carbinol" as the ending. For instance, can be named trimethylcarbinol. Primary, secondary, and tertiary Alcohols are then classified into primary, secondary (sec-, s-), and tertiary (tert-, t-), based upon the number of carbon atoms connected to the carbon atom that bears the hydroxyl functional group. (The respective numeric shorthands 1°, 2°, and 3° are sometimes used in informal settings.) The primary alcohols have general formulas . The simplest primary alcohol is methanol (), for which R=H, and the next is ethanol, for which , the methyl group. Secondary alcohols are those of the form RR'CHOH, the simplest of which is 2-propanol (). For the tertiary alcohols the general form is RR'R"COH. The simplest example is tert-butanol (2-methylpropan-2-ol), for which each of R, R', and R" is . In these shorthands, R, R', and R" represent substituents, alkyl or other attached, generally organic groups. Examples Applications Alcohols have a long history of myriad uses. For simple mono-alcohols, which is the focus on this article, the following are most important industrial alcohols: methanol, mainly for the production of formaldehyde and as a fuel additive ethanol, mainly for alcoholic beverages, fuel additive, solvent 1-propanol, 1-butanol, and isobutyl alcohol for use as a solvent and precursor to solvents C6–C11 alcohols used for plasticizers, e.g. in polyvinylchloride fatty alcohol (C12–C18), precursors to detergents Methanol is the most common industrial alcohol, with about 12 million tons/y produced in 1980. The combined capacity of the other alcohols is about the same, distributed roughly equally. Toxicity With respect to acute toxicity, simple alcohols have low acute toxicities. Doses of several milliliters are tolerated. For pentanols, hexanols, octanols and longer alcohols, LD50 range from 2–5 g/kg (rats, oral). Ethanol is less acutely toxic. All alcohols are mild skin irritants. The metabolism of methanol (and ethylene glycol) is affected by the presence of ethanol, which has a higher affinity for liver alcohol dehydrogenase. In this way methanol will be excreted intact in urine. Physical properties In general, the hydroxyl group makes alcohols polar. Those groups can form hydrogen bonds to one another and to most other compounds. Owing to the presence of the polar OH alcohols are more water-soluble than simple hydrocarbons. Methanol, ethanol, and propanol are miscible in water. Butanol, with a four-carbon chain, is moderately soluble. Because of hydrogen bonding, alcohols tend to have higher boiling points than comparable hydrocarbons and ethers. The boiling point of the alcohol ethanol is 78.29 °C, compared to 69 °C for the hydrocarbon hexane, and 34.6 °C for diethyl ether. Occurrence in nature Simple alcohols are found widely in nature. Ethanol is the most prominent because it is the product of fermentation, a major energy-producing pathway. Other simple alcohols, chiefly fusel alcohols, are formed in only trace amounts. More complex alcohols however are pervasive, as manifested in sugars, some amino acids, and fatty acids. Production Hydroxylation Many alcohols are produced by hydroxylation, i.e., the installation of a hydroxy group using oxygen or related oxidant. Hydroxylation is the means by which the body processes many poisons, converting lipophilic compounds into hydrophilic derivatives that are more readily excreted. Enzymes called hydroxylases and oxidases facilitate these conversions. Many industrial alcohols, such as cyclohexanol for the production of nylon, are produced by hydroxylation. Ziegler and oxo processes In the Ziegler process, linear alcohols are produced from ethylene and triethylaluminium followed by oxidation and hydrolysis. An idealized synthesis of 1-octanol is shown: Al(C2H5)3 + 9 C2H4 -> Al(C8H17)3 Al(C8H17)3 + 3O + 3 H2O -> 3 HOC8H17 + Al(OH)3 The process generates a range of alcohols that are separated by distillation. Many higher alcohols are produced by hydroformylation of alkenes followed by hydrogenation. When applied to a terminal alkene, as is common, one typically obtains a linear alcohol: RCH=CH2 + H2 + CO -> RCH2CH2CHO RCH2CH2CHO + 3 H2 -> RCH2CH2CH2OH Such processes give fatty alcohols, which are useful for detergents. Hydration reactions Some low molecular weight alcohols of industrial importance are produced by the addition of water to alkenes. Ethanol, isopropanol, 2-butanol, and tert-butanol are produced by this general method. Two implementations are employed, the direct and indirect methods. The direct method avoids the formation of stable intermediates, typically using acid catalysts. In the indirect method, the alkene is converted to the sulfate ester, which is subsequently hydrolyzed. The direct hydration using ethylene (ethylene hydration) or other alkenes from cracking of fractions of distilled crude oil. Hydration is also used industrially to produce the diol ethylene glycol from ethylene oxide. Fermentation Ethanol is obtained by fermentation of glucose (which is often obtained from starch) in the presence of yeast. Carbon dioxide is cogenerated. Like ethanol, butanol can be produced by fermentation processes. Saccharomyces yeast are known to produce these higher alcohols at temperatures above . The bacterium Clostridium acetobutylicum can feed on cellulose (also an alcohol) to produce butanol on an industrial scale. Substitution Primary alkyl halides react with aqueous NaOH or KOH to alcohols in nucleophilic aliphatic substitution. (Secondary and especially tertiary alkyl halides will give the elimination (alkene) product instead). Grignard reagents react with carbonyl groups to secondary and tertiary alcohols. Related reactions are the Barbier reaction and the Nozaki-Hiyama reaction. Reduction Aldehydes or ketones are reduced with sodium borohydride or lithium aluminium hydride (after an acidic workup). Another reduction by aluminiumisopropylates is the Meerwein-Ponndorf-Verley reduction. Noyori asymmetric hydrogenation is the asymmetric reduction of β-keto-esters. Hydrolysis Alkenes engage in an acid catalysed hydration reaction using concentrated sulfuric acid as a catalyst that gives usually secondary or tertiary alcohols. Formation of a secondary alcohol via alkene reduction and hydration is shown on the right: The hydroboration-oxidation and oxymercuration-reduction of alkenes are more reliable in organic synthesis. Alkenes react with N-bromosuccinimide and water in halohydrin formation reaction. Amines can be converted to diazonium salts, which are then hydrolyzed. Reactions Deprotonation With aqueous pKa values of around 16–19, they are, in general, slightly weaker acids than water. With strong bases such as sodium hydride or sodium they form salts called alkoxides, with the general formula (where R is an alkyl and M is a metal). 2 R-OH + 2 NaH -> 2 R-O-Na + 2 H2 2 R-OH + 2 Na -> 2 R-O-Na + H2 The acidity of alcohols is strongly affected by solvation. In the gas phase, alcohols are more acidic than in water. In DMSO, alcohols (and water) have a pKa of around 29–32. As a consequence, alkoxides (and hydroxide) are powerful bases and nucleophiles (e.g., for the Williamson ether synthesis) in this solvent. In particular, or in DMSO can be used to generate significant equilibrium concentrations of acetylide ions through the deprotonation of alkynes (see Favorskii reaction). Nucleophilic substitution Tertiary alcohols react with hydrochloric acid to produce tertiary alkyl chloride. Primary and secondary alcohols are converted to the corresponding chlorides using thionyl chloride and various phosphorus chloride reagents. Primary and secondary alcohols, likewise, convert to alkyl bromides phosphorus tribromide, for example: 3 R-OH + PBr3 -> 3 RBr + H3PO3 In the Barton-McCombie deoxygenation an alcohol is deoxygenated to an alkane with tributyltin hydride or a trimethylborane-water complex in a radical substitution reaction. Dehydration Meanwhile, the oxygen atom has lone pairs of nonbonded electrons that render it weakly basic in the presence of strong acids such as sulfuric acid. For example, with methanol: Upon treatment with strong acids, alcohols undergo the E1 elimination reaction to produce alkenes. The reaction, in general, obeys Zaitsev's Rule, which states that the most stable (usually the most substituted) alkene is formed. Tertiary alcohols eliminate easily at just above room temperature, but primary alcohols require a higher temperature. This is a diagram of acid catalysed dehydration of ethanol to produce ethylene: A more controlled elimination reaction requires the formation of the xanthate ester. Protonolysis Tertiary alcohols react with strong acids to generate carbocations. The reaction is related to their dehydration, e.g. isobutylene from tert-butyl alcohol. A special kind of dehydration reaction involves triphenylmethanol and especially its amine-substituted derivatives. When treated with acid, these alcohols lose water to give stable carbocations, which are commercial dyes. Esterification Alcohol and carboxylic acids react in the so-called Fischer esterification. The reaction usually requires a catalyst, such as concentrated sulfuric acid: R-OH + R'-CO2H -> R'-CO2R + H2O Other types of ester are prepared in a similar manner for example, tosyl (tosylate) esters are made by reaction of the alcohol with p-toluenesulfonyl chloride in pyridine. Oxidation Primary alcohols () can be oxidized either to aldehydes () or to carboxylic acids (). The oxidation of secondary alcohols () normally terminates at the ketone () stage. Tertiary alcohols () are resistant to oxidation. The direct oxidation of primary alcohols to carboxylic acids normally proceeds via the corresponding aldehyde, which is transformed via an aldehyde hydrate () by reaction with water before it can be further oxidized to the carboxylic acid. Reagents useful for the transformation of primary alcohols to aldehydes are normally also suitable for the oxidation of secondary alcohols to ketones. These include Collins reagent and Dess-Martin periodinane. The direct oxidation of primary alcohols to carboxylic acids can be carried out using potassium permanganate or the Jones reagent. See also Enol Ethanol fuel Fatty alcohol Index of alcohol-related articles List of alcohols Lucas test Polyol Rubbing alcohol Sugar alcohol Transesterification Notes Citations General references Antiseptics Functional groups

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https://en.wikipedia.org/wiki/Achill%20Island

Achill Island

Achill Island (; ) is the largest of the Irish isles and lies off the west coast of Ireland in County Mayo. It has a population of 2,345. Its area is . Achill is attached to the mainland by Michael Davitt Bridge, between the villages of Achill Sound and Polranny. A bridge was first completed here in 1887. Other centres of population include the villages of Keel, Dooagh, Dooega, Dooniver, and Dugort. The parish's main Gaelic football pitch and secondary school are on the mainland at Polranny. Early human settlements are believed to have been established on Achill around 3000 BC. The island is 87% peat bog. The parish of Achill consists of Achill Island, Achillbeg, Inishbiggle and the Corraun Peninsula. Roughly half of the island, including the villages of Achill Sound and Bunacurry are in the Gaeltacht (traditional Irish-speaking region) of Ireland, although the vast majority of the island's population speaks English as their daily language. History It is believed that at the end of the Neolithic Period (around 4000 BC), Achill had a population of 500–1,000 people. The island would have been mostly forest until the Neolithic people began crop cultivation. Settlement increased during the Iron Age, and the dispersal of small promontory forts around the coast indicate the warlike nature of the times. Megalithic tombs and forts can be seen at Slievemore, along the Atlantic Drive and on Achillbeg. Overlords Achill Island lies in the Barony of Burrishoole, in the territory of ancient Umhall (Umhall Uactarach and Umhall Ioctarach), that originally encompassed an area extending from the County Galway/Mayo border to Achill Head. The hereditary chieftains of Umhall were the O'Malleys, recorded in the area in 814 AD when they successfully repelled an onslaught by the Vikings in Clew Bay. The Anglo-Norman invasion of Connacht in 1235 AD saw the territory of Umhall taken over by the Butlers and later by the de Burgos. The Butler Lordship of Burrishoole continued into the late 14th century when Thomas le Botiller was recorded as being in possession of Akkyll and Owyll. Immigration In the 17th and 18th centuries, there was much migration to Achill from other parts of Ireland, particularly Ulster, due to the political and religious turmoil of the time. For a while, there were two different dialects of Irish being spoken on Achill. This led to many townlands being recorded as having two names during the 1824 Ordnance Survey, and some maps today give different names for the same place. Achill Irish still has many traces of Ulster Irish. In the nineteenth and early twentieth centuries, seasonal migration of farm workers to Scotland to pick potatoes took place; these squads of 'tattie howkers' were known as Achill workers, although not all were from Achill, and were organised for potato merchants by gaffers or gangers. Squads travelled from farm to farm to harvest the crop and were allocated basic accommodation. On 15 September 1937 ten young migrant potato pickers from Achill died in a fire at Kirkintilloch. Specific historical sites and events Grace O'Malley's Castle Carrickkildavnet Castle is a 15th-century tower house associated with the O'Malley Clan, who were once a ruling family of Achill. Grace O' Malley, or Granuaile, the most famous of the O'Malleys, was born on Clare Island around 1530. Her father was the chieftain of the barony of Murrisk. The O'Malleys were a powerful seafaring family, who traded widely. Grace became a fearless leader and gained fame as a sea captain and pirate. She is reputed to have met with Queen Elizabeth I in 1593. She died around 1603 and is buried in the O'Malley family tomb on Clare Island. Achill Mission One of Achill's most famous historical sites is that of the Achill Mission or 'the Colony' at Dugort. In 1831, the Anglican (Church of Ireland) Rev Edward Nangle founded a mission at Dugort. The Mission included schools, cottages, an orphanage, an infirmary and a guesthouse. The Colony gave rise to mixed assessments, particularly during the Great Famine when charges of "souperism" were leveled against Nangle. The provision of food across the Achill Mission schools - which also provided 'scriptural' religious instruction - was particularly controversial. For almost forty years, Nangle edited a newspaper called the Achill Missionary Herald and Western Witness, which was printed in Achill. He expanded his mission into Mweelin, Kilgeever, West Achill where a school, church, rectory, cottages and a training school were built. Edward's wife, Eliza, suffered poor health in Achill and died in 1852; she is buried with six of the Nangle children on the slopes of Slievemore in North Achill. In 1848, at the height of the Great Famine, the Achill Mission published a prospectus seeking to raise funds for the acquisition of significant additional lands from Sir Richard O'Donnell. The document gives an overview, from the Mission's perspective, of its activities in Achill over the previous decade and a half including considerable sectarian unrest. In 1851, Edward Nangle confirmed the purchase of the land which made the Achill Mission the largest landowner on the island. The Achill Mission began to decline slowly after Nangle was moved from Achill and closed in the 1880s. When Edward Nangle died in 1883 there were opposing views on his legacy. Railway In 1894, the Westport – Newport railway line was extended to Achill Sound. The railway station is now a hostel. The train provided a great service to Achill, but it also is said to have fulfilled an ancient prophecy. Brian Rua O' Cearbhain had prophesied that 'carts on iron wheels' would carry bodies into Achill on their first and last journey. In 1894, the first train on the Achill railway carried the bodies of victims of the Clew Bay Drowning. This tragedy occurred when a boat overturned in Clew Bay, drowning thirty-two young people. They had been going to meet the steamer which would take them to Scotland for potato picking. The Kirkintilloch Fire in 1937 almost fulfilled the second part of the prophecy when the bodies of ten victims were carried by rail to Achill. While it was not literally the last train, the railway closed just two weeks later. These people had died in a fire in a bothy in Kirkintilloch. This term referred to the temporary accommodation provided for those who went to Scotland to pick potatoes, a migratory pattern that had been established in the early nineteenth century. Kildamhnait Kildamhnait on the south-east coast of Achill is named after St. Damhnait, or Dymphna, who founded a church there in the 7th century. There is also a holy well just outside the graveyard. The present church was built in the 1700s and the graveyard contains memorials to the victims of two of Achill's greatest tragedies, the Kirchintilloch Fire (1937) and the Clew Bay Drowning (1894). The Monastery In 1852, Dr John MacHale, Roman Catholic Archbishop of Tuam, purchased land in Bunnacurry, on which a Franciscan Monastery was established, which, for many years, provided an education for local children. The building of the monastery was marked by a conflict between the Protestants of the mission colony and the workers building the monastery. The dispute is known in the island folklore as the Battle of the Stones. A notable monk who lived at the monastery for almost thirty years was Brother Paul Carney. He wrote a biography of James Lynchehaun who rose to either fame or infamy (depending on whom you spoke to) following his conviction for the 1894 attack on an Englishwoman named Agnes MacDonnell, which left her face disfigured, and the burning of her home, Valley House, Tonatanvally, North Achill. (The home was rebuilt and Mrs MacDonnell died there in 1923, while Lynchehaun escaped to the USA after serving 7 years and successfully resisted extradition but spent his last years in Scotland, where he died.) Brother Carney's-great grandniece, Patricia Byrne, write her own account of Mrs MacDonnell and Lynchehaun, entitled The Veiled Woman of Achill. Brother Carney also wrote accounts of his lengthy fundraising trips across the U.S. at the start of the 20th century. The ruins of this monastery are still to be seen in Bunnacurry today. Valley House The historic Valley House is located in Tonatanvally, "The Valley", near Dugort, in the northeast of Achill Island. The present building sits on the site of a hunting lodge built by the Earl of Cavan in the 19th century. Its notoriety arises from an incident in 1894 in which the then owner, an Englishwoman, Mrs Agnes McDonnell, was savagely beaten and the house set alight by a local man, James Lynchehaun. Lynchehaun had been employed by McDonnell as her land agent, but the two fell out and he was sacked and told to quit his accommodation on her estate. A lengthy legal battle ensued, with Lynchehaun refusing to leave. At the time, in the 1890s, the issue of land ownership in Ireland was politically charged. After the events at the Valley House in 1895, Lynchehaun would falsely claim his actions were carried out on behalf of the Irish Republican Brotherhood and motivated by politics. He escaped custody after serving seven years and fled to the United States seeking political asylum (although Michael Davitt refused to shake his hand, calling Lynchehaun a "murderer"), where he successfully defeated legal attempts by the British authorities to have him extradited to face charges arising from the attack and the burning of the Valley House. Agnes McDonnell suffered terrible injuries from the attack but survived and lived for another 23 years, dying in 1923. Lynchehaun is said to have returned to Achill on two occasions, once in disguise as an American tourist, and eventually died in Girvan, Scotland, in 1937. The Valley House is now a hostel and bar. The Deserted Village Close by Dugort, at the base of Slievemore mountain lies the Deserted Village. There are approximately 80 ruined houses in the village. The houses were built of unmortared stone, which means that no cement or mortar was used to hold the stones together. Each house consisted of just one room and this room was used as a kitchen, living room, bedroom and even a stable. If one looks at the fields around the Deserted Village and right up the mountain, one can see the tracks in the fields of 'lazy beds', which is the way crops like potatoes were grown. In Achill, as in many areas of Ireland, a system called 'Rundale' was used for farming. This meant that the land around a village was rented from a landlord. This land was then shared by all the villagers to graze their cattle and sheep. Each family would then have two or three small pieces of land scattered about the village, which they used to grow crops. For many years people lived in the village and then in 1845 Famine struck in Achill as it did in the rest of Ireland. Most of the families moved to the nearby village of Dooagh, which is beside the sea, while some others emigrated. Living beside the sea meant that fish and shellfish could be used for food. The village was completely abandoned which is where the name 'Deserted Village' came from. No one has lived in these houses since the time of the Famine, however, the families that moved to Dooagh and their descendants, continued to use the village as a 'booley village'. This means that during the summer season, the younger members of the family, teenage boys and girls, would take the cattle to graze on the hillside and they would stay in the houses of the Deserted Village. This custom continued until the 1940s. Boolying was also carried out in other areas of Achill, including Annagh on Croaghaun mountain and in Curraun. At Ailt, Kildownet, the remains of a similar deserted village can be found. This village was deserted in 1855 when the tenants were evicted by the local landlord so the land could be used for cattle grazing; the tenants were forced to rent holdings in Currane, Dooega and Slievemore. Others emigrated to America. Archaeology Recent archaeological research suggests the village was occupied year-round at least as early as the 19th century, though it is known to have served as a seasonally occupied 'booley village' by the first half of the 20th century. A booley village (a number of which exist in a ruined state on the island) is a village occupied only during part of the year, such as a resort community, a lake community, or (as the case on Achill) a place to live while tending flocks or herds of ruminants during winter or summer pasturing. Specifically, some of the people of Dooagh and Pollagh would migrate in the summer to Slievemore and then go back to Dooagh in the autumn. The summer 2009 field school excavated Round House 2 on Slievemore Mountain under the direction of archaeologist Stuart Rathbone. Only the outside north wall, entrance way and inside of the Round House were completely excavated. From 2004 to 2006, the Achill Island Maritime Archaeology Project directed by Chuck Meide was sponsored by the College of William and Mary, the Institute of Maritime History, the Achill Folklife Centre (now the Achill Archaeology Centre), and the Lighthouse Archaeological Maritime Program (LAMP). This project focused on the documentation of archaeological resources related to Achill's rich maritime heritage. Maritime archaeologists recorded a 19th-century fishing station, an ice house, boat house ruins, a number of anchors which had been salvaged from the sea, 19th-century and more recent currach pens, a number of traditional vernacular watercraft including a possibly 100-year-old Achill yawl, and the remains of four historic shipwrecks. Other places of interest The cliffs of Croaghaun on the western end of the island are the third highest sea cliffs in Europe but are inaccessible by road. Near the westernmost point of Achill, Achill Head, is Keem Bay. Keel Beach is quite popular with tourists and some locals as a surfing location. South of Keem beach is Moytoge Head, which with its rounded appearance drops dramatically down to the ocean. An old British observation post, built during World War I to prevent the Germans from landing arms for the Irish Republican Army, is still standing on Moytoge. During the Second World War this post was rebuilt by the Irish Defence Forces as a lookout post for the Coast Watching Service wing of the Defence Forces. It operated from 1939 to 1945. The mountain of Slievemore, (672 m) rises dramatically in the north of the island and the Atlantic Drive (along the south/west of the island) has some scenic views. On the slopes of Slievemore, there is an abandoned village, the "Deserted Village", traditionally thought to be a remnant village from An Gorta Mór (The Great Hunger of 1845–1849). Just west of the deserted village is an old Martello tower, again built by the British to warn of any possible French invasion during the Napoleonic Wars. The area also boasts an approximately 5000-year-old Neolithic tomb. Achillbeg (, Little Achill) is a small island just off Achill's southern tip. Its inhabitants were resettled on Achill in the 1960s. A plaque to Johnny Kilbane is situated on Achillbeg and was erected to celebrate 100 years since his first championship win. The villages of Dooniver and Askill have picturesque scenery and the cycle route is popular with tourists. Caisleán Ghráinne, also known as Kildownet Castle, is a small tower house built in the early 1400s. It is located in Cloughmore, on the south of Achill Island. It is noted for its associations with Grace O'Malley, along with the larger Rockfleet Castle in Newport. Economy While a number of attempts at setting up small industrial units on the island have been made, its economy is largely dependent on tourism. Subventions from Achill people working abroad allowed many families to remain living in Achill throughout the 19th and 20th centuries. In the past, fishing was a significant activity but this aspect of the economy is small now. At one stage, the island was known for its shark fishing, basking shark in particular was fished for its valuable shark liver oil. There was a big spurt of growth in tourism in the 1960s and 1970s before which life was tough and difficult on the island. Despite healthy visitor numbers each year, the common perception is that tourism in Achill has been slowly declining since its heyday. Currently, the largest employers on Achill are two hotels. Religion Most people on Achill are either Roman Catholic or Anglican (Church of Ireland). Overview of the churches Catholic: Bunnacurry Church (Saint Josephs) The Valley Church; Only open for certain events. Dookinella Church Currane Church Pollagh Church Derreens Church Dooega Church Belfarsed Church Achill Sound Church Church of Ireland: Dugort Church (St. Thomas's church) Innisbiggle Island church Other: House of Prayer, Achill Artists For almost two centuries, a number of artists have had a close relationship with Achill Island, including the landscape painter Paul Henry. Within the emerging Irish Free State, Paul Henry's landscapes from Achill and other areas reinforced a vision of Ireland of communities living in harmony with the land. He lived in Achill for almost a decade with his wife, artist Grace Henry and, while using similar subject-matter, the pair developed very different styles. This relationship of artists with Achill was particularly intense in the early decades of the twentieth century when Eva O'Flaherty (1874-1963) became a focal point for artistic networking on the island. A network of over 200 artists linked to Achill is charted in "Achill Painters - An Island History" and includes painters such as the Belgian Marie Howet, the American Robert Henri, the modernist painter Mainie Jellett and contemporary artist Camille Souter. The 2018 Coming Home Art & The Great Hunger exhibition, in partnership with The Great Hunger Museum of Quinnipiac University, USA, featured Achill's Deserted Village and the island lazy beds prominently in works by Geraldine O'Reilly and Alanna O'Kelly; also included was an 1873 painting, 'Cottage, Achill Island' by Alexander Williams - one of the first artists to open up the island to a wider audience. Education Hedge schools existed in most villages of Achill in various periods of history. A university was started by the missions to Achill in Mweelin. In the modern age, there used to be two secondary schools in Achill, Mc Hale College and Scoil Damhnait. However, in August 2011, the two schools amalgamated to form Coláiste Pobail Acla. For primary education, there are eight national schools including Bullsmouth NS, Valley NS, Bunnacurry NS, Dookinella NS, Dooagh NS, Saula NS, Achill Sound NS and Tonragee NS. National schools closed down include Dooega NS, Crumpaun NS, Ashleam NS and Currane NS. Transport Rail Achill railway station, still on the mainland and not on the island, was opened by the Midland Great Western Railway on 13 May 1895, the terminus of its line from Westport via Newport and Mulranny. The station, and the line, were closed by the Great Southern Railways on 1 October 1937. The Great Western Greenway, created during 2010 and 2011, follows the line's route and has proved to be very successful in attracting visitors to Achill and the surrounding areas. Road The R319 road is the main road onto the island. Bus Bus Éireann's route 450 operates several times daily to Westport and Louisburgh from the island's scattered villages. Bus Éireann also provides transport for the area's secondary school children. Cuisine Achill Island has several bars, cafes and restaurants. The island's Atlantic location means that seafood, including lobster, mussels, salmon, trout and winkles, are common meals. With a large sheep and cow populations, lamb and beef are popular on the island too. Sport Achill has a Gaelic football club which competes in the junior championship and division 1E of the Mayo League. There are also Achill Rovers which play in the Mayo Association Football League. There is a 9-hole links golf course on the island. Outdoor activities can be done through Achill Outdoor Education Centre. Achill Island's rugged landscape and the surrounding ocean offers multiple locations for outdoor adventure activities, like surfing, kite-surfing and sea kayaking. Fishing and watersports are also common. Sailing regattas featuring a local vessel type, the Achill Yawl, have been popular since the 19th century, though most present-day yawls, unlike their traditional working boat ancestors, have been structurally modified to promote greater speed under sail. The island's waters and underwater sites are occasionally visited by scuba divers, though Achill's unpredictable weather generally has precluded a commercially successful recreational diving industry. Population In 2016, the population was 2,594, with 5.2% claiming they spoke Irish on a daily basis outside the education system. The island's population has declined from around 6,000 before the Great Famine of the mid-19th century. Demographics The table below reports data on Achill Island's population taken from Discover the Islands of Ireland (Alex Ritsema, Collins Press, 1999) and the census of Ireland. Architecture Few inhabited houses date from before the 20th century, though there are many examples of abandoned stone structures dating to the 19th century. The best known of these earlier can be seen in the "Deserted Village" ruins near the graveyard at the foot of Slievemore. Even the houses in this village represent a relatively comfortable class of dwelling as, even as recently as a hundred years ago, some people still used "Beehive" style houses (small circular single-roomed dwellings with a hole in the ceiling to let out smoke). Many of the oldest inhabited cottages date from the activities of the Congested Districts Board for Ireland—a body set up around the turn of the 20th century in Ireland to improve the welfare of the inhabitants of small villages and towns. Most of the homes in Achill at the time were very small and tightly packed together in villages. The CDB subsidised the building of new, more spacious (though still small by modern standards) homes outside of the traditional villages. Notable people Heinrich Böll, German writer who spent several summers with his family and later lived several months per year on the island Charles Boycott (1832–1897), unpopular landowner from whom the term boycott arose Nancy Corrigan, pioneer aviator, second female commercial pilot in the US. Dermot Freyer (1883–1970), writer who opened a hotel on the island Paul Henry, artist, stayed on the island for a number of years in the early 1900s James Kilbane, singer, lives on the island Johnny Kilbane, boxer Saoirse McHugh, former Green Party politician Danny McNamara, musician Richard McNamara, musician Eva O’Flaherty, Nationalist, model and milliner Thomas Patten, from Dooega. Died during the Siege of Madrid in December 1936 Honor Tracy, author, lived there until her death in 1989 Literature Heinrich Böll: Irisches Tagebuch, Berlin, 1957 Bob Kingston The Deserted Village at Slievemore, Castlebar, 1990 Theresa McDonald: Achill: 5000 B.C. to 1900 A.D.: Archeology History Folklore, I.A.S. Publications [1992] Rosa Meehan: The Story of Mayo, Castlebar, 2003 James Carney: The Playboy & the Yellow lady, 1986 Poolbeg Hugo Hamilton: The Island of Talking, 2007 Kevin Barry: Beatlebone, 2015 Mealla Nī Ghiobúin: Dugort, Achill Island 1831–1861: The Rise and Fall of a Missionary Community, 2001 Patricia Byrne: The Veiled Woman of Achill – Island Outrage & A Playboy Drama, 2012 Mary J. Murphy: Achill's Eva O'Flaherty – Forgotten Island Heroine, 2011 Patricia Byrne: The Preacher and The Prelate – The Achill Mission Colony and The Battle for Souls in Famine Ireland, 2018 Mary J. Murphy, Achill Painters -An Island History, 2020 Michael Gallagher, Stick on Stone, 2013 In popular culture The island is featured throughout the film The Banshees of Inisherin in various locations on the island including Keem Bay, Cloughmore, and Purteen Pier. The film My Sailor My Love features Achill island. The island is the primary setting of the visual novel If Found.... See also Achillbeg Innisbiggle List of islands of County Mayo References External links Colaiste Pobail Acla students project on the Achill area Achill Island Maritime Archaeology Project VisitAchill multilingual visitor's site Islands of County Mayo Gaeltacht places in County Mayo

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https://en.wikipedia.org/wiki/Allen%20Ginsberg

Allen Ginsberg

Irwin Allen Ginsberg (; June 3, 1926 – April 5, 1997) was an American poet and writer. As a student at Columbia University in the 1940s, he began friendships with Lucien Carr, William S. Burroughs and Jack Kerouac, forming the core of the Beat Generation. He vigorously opposed militarism, economic materialism, and sexual repression, and he embodied various aspects of this counterculture with his views on drugs, sex, multiculturalism, hostility to bureaucracy, and openness to Eastern religions. Best known for his poem "Howl", Ginsberg denounced what he saw as the destructive forces of capitalism and conformity in the United States. San Francisco police and US Customs seized copies of "Howl" in 1956, and a subsequent obscenity trial in 1957 attracted widespread publicity due to the poem's language and descriptions of heterosexual and homosexual sex at a time when sodomy laws made (male) homosexual acts a crime in every state. The poem reflected Ginsberg's own sexuality and his relationships with a number of men, including Peter Orlovsky, his lifelong partner. Judge Clayton W. Horn ruled that "Howl" was not obscene, asking: "Would there be any freedom of press or speech if one must reduce his vocabulary to vapid innocuous euphemisms?" Ginsberg was a Buddhist who extensively studied Eastern religious disciplines. He lived modestly, buying his clothing in second-hand stores and residing in apartments in New York City's East Village. One of his most influential teachers was Tibetan Buddhist Chögyam Trungpa, the founder of the Naropa Institute in Boulder, Colorado. At Trungpa's urging, Ginsberg and poet Anne Waldman started The Jack Kerouac School of Disembodied Poetics there in 1974. For decades, Ginsberg was active in political protests across a range of issues from the Vietnam War to the war on drugs. His poem "September on Jessore Road" drew attention to refugees fleeing the 1971 Bangladeshi genocide, exemplifying what literary critic Helen Vendler described as Ginsberg's persistent opposition to "imperial politics" and the "persecution of the powerless". His collection The Fall of America shared the annual National Book Award for Poetry in 1974. In 1979, he received the National Arts Club gold medal and was inducted into the American Academy of Arts and Letters. He was a Pulitzer Prize finalist in 1995 for his book Cosmopolitan Greetings: Poems 1986–1992. Biography Early life and family Ginsberg was born into a Jewish family in Newark, New Jersey, and grew up in nearby Paterson. He was the second son of Louis Ginsberg, also born in Newark, a schoolteacher and published poet, and the former Naomi Levy, born in Nevel (Russia) and a fervent Marxist. As a teenager, Ginsberg began to write letters to The New York Times about political issues, such as World War II and workers' rights. He published his first poems in the Paterson Morning Call. While in high school, Ginsberg became interested in the works of Walt Whitman, inspired by his teacher's passionate reading. In 1943, Ginsberg graduated from Eastside High School and briefly attended Montclair State College before entering Columbia University on a scholarship from the Young Men's Hebrew Association of Paterson. In 1945, he joined the Merchant Marine to earn money to continue his education at Columbia. While at Columbia, Ginsberg contributed to the Columbia Review literary journal, the Jester humor magazine, won the Woodberry Poetry Prize, served as president of the Philolexian Society (literary and debate group), and joined Boar's Head Society (poetry society). He was a resident of Hartley Hall, where other Beat Generation poets such as Jack Kerouac and Herbert Gold also lived. Ginsberg has stated that he considered his required freshman seminar in Great Books, taught by Lionel Trilling, to be his favorite Columbia course. According to The Poetry Foundation, Ginsberg spent several months in a mental institution after he pleaded insanity during a hearing. He was allegedly being prosecuted for harboring stolen goods in his dorm room. It was noted that the stolen property was not his, but belonged to an acquaintance. Ginsberg also took part in public readings at the Episcopal St. Mark's Church in-the-Bowery which would later hold a memorial service for him after his death. Relationship with his parents Ginsberg referred to his parents in a 1985 interview as "old-fashioned delicatessen philosophers". His mother was also an active member of the Communist Party and took Ginsberg and his brother Eugene to party meetings. Ginsberg later said that his mother "made up bedtime stories that all went something like: 'The good king rode forth from his castle, saw the suffering workers and healed them.'" Of his father Ginsberg said: "My father would go around the house either reciting Emily Dickinson and Longfellow under his breath or attacking T. S. Eliot for ruining poetry with his 'obscurantism.' I grew suspicious of both sides." Naomi Ginsberg had schizophrenia which often manifested as paranoid delusions, disordered thinking and multiple suicide attempts. She would claim, for example, that the president had implanted listening devices in their home and that her mother-in-law was trying to kill her. Her suspicion of those around her caused Naomi to draw closer to young Allen, "her little pet," as Bill Morgan says in his biography of Ginsberg, titled I Celebrate Myself: The Somewhat Private Life of Allen Ginsberg. She also tried to kill herself by slitting her wrists and was soon taken to Greystone, a mental hospital; she would spend much of Ginsberg's youth in mental hospitals. His experiences with his mother and her mental illness were a major inspiration for his two major works, "Howl" and his long autobiographical poem "Kaddish for Naomi Ginsberg (1894–1956)". When he was in junior high school, he accompanied his mother by bus to her therapist. The trip deeply disturbed Ginsberg—he mentioned it and other moments from his childhood in "Kaddish". His experiences with his mother's mental illness and her institutionalization are also frequently referred to in "Howl." For example, "Pilgrim State, Rockland, and Grey Stone's foetid halls" is a reference to institutions frequented by his mother and Carl Solomon, ostensibly the subject of the poem: Pilgrim State Hospital and Rockland State Hospital in New York and Greystone Park Psychiatric Hospital in New Jersey. This is followed soon by the line "with mother finally ******." Ginsberg later admitted the deletion was the expletive "fucked." He also says of Solomon in section three, "I'm with you in Rockland where you imitate the shade of my mother," once again showing the association between Solomon and his mother. Ginsberg received a letter from his mother after her death responding to a copy of "Howl" he had sent her. It admonished Ginsberg to be good and stay away from drugs; she says, "The key is in the window, the key is in the sunlight at the window—I have the key—Get married Allen don't take drugs—the key is in the bars, in the sunlight in the window." In a letter she wrote to Ginsberg's brother Eugene, she said, "God's informers come to my bed, and God himself I saw in the sky. The sunshine showed too, a key on the side of the window for me to get out. The yellow of the sunshine, also showed the key on the side of the window." These letters and the absence of a facility to recite kaddish inspired Ginsberg to write "Kaddish", which makes references to many details from Naomi's life, Ginsberg's experiences with her, and the letter, including the lines "the key is in the light" and "the key is in the window." New York Beats In Ginsberg's first year at Columbia he met fellow undergraduate Lucien Carr, who introduced him to a number of future Beat writers, including Jack Kerouac, William S. Burroughs, and John Clellon Holmes. They bonded, because they saw in one another an excitement about the potential of American youth, a potential that existed outside the strict conformist confines of post–World War II, McCarthy-era America. Ginsberg and Carr talked excitedly about a "New Vision" (a phrase adapted from Yeats' "A Vision"), for literature and America. Carr also introduced Ginsberg to Neal Cassady, for whom Ginsberg had a long infatuation. In the first chapter of his 1957 novel On the Road Kerouac described the meeting between Ginsberg and Cassady. Kerouac saw them as the dark (Ginsberg) and light (Cassady) side of their "New Vision", a perception stemming partly from Ginsberg's association with communism, of which Kerouac had become increasingly distrustful. Though Ginsberg was never a member of the Communist Party, Kerouac named him "Carlo Marx" in On the Road. This was a source of strain in their relationship. Also, in New York, Ginsberg met Gregory Corso in the Pony Stable Bar. Corso, recently released from prison, was supported by the Pony Stable patrons and was writing poetry there the night of their meeting. Ginsberg claims he was immediately attracted to Corso, who was straight, but understood homosexuality after three years in prison. Ginsberg was even more struck by reading Corso's poems, realizing Corso was "spiritually gifted." Ginsberg introduced Corso to the rest of his inner circle. In their first meeting at the Pony Stable, Corso showed Ginsberg a poem about a woman who lived across the street from him and sunbathed naked in the window. Amazingly, the woman happened to be Ginsberg's girlfriend that he was living with during one of his forays into heterosexuality. Ginsberg took Corso over to their apartment. There the woman proposed sex with Corso, who was still very young and fled in fear. Ginsberg introduced Corso to Kerouac and Burroughs and they began to travel together. Ginsberg and Corso remained lifelong friends and collaborators. Shortly after this period in Ginsberg's life, he became romantically involved with Elise Nada Cowen after meeting her through Alex Greer, a philosophy professor at Barnard College whom she had dated for a while during the burgeoning Beat generation's period of development. As a Barnard student, Elise Cowen extensively read the poetry of Ezra Pound and T. S. Eliot, when she met Joyce Johnson and Leo Skir, among other Beat players. As Cowen had felt a strong attraction to darker poetry most of the time, Beat poetry seemed to provide an allure to what suggests a shadowy side of her persona. While at Barnard, Cowen earned the nickname "Beat Alice" as she had joined a small group of anti-establishment artists and visionaries known to outsiders as beatniks, and one of her first acquaintances at the college was the beat poet Joyce Johnson who later portrayed Cowen in her books, including "Minor Characters" and Come and Join the Dance, which expressed the two women's experiences in the Barnard and Columbia Beat community. Through his association with Elise Cowen, Ginsberg discovered that they shared a mutual friend, Carl Solomon, to whom he later dedicated his most famous poem "Howl." This poem is considered an autobiography of Ginsberg up to 1955, and a brief history of the Beat Generation through its references to his relationship to other Beat artists of that time. The "Blake vision" In 1948, in an apartment in East Harlem, Ginsberg experienced an auditory hallucination while masturbating and reading the poetry of William Blake, which he later referred to as his "Blake vision". Ginsberg claimed to have heard the voice of God—also described as the "voice of the Ancient of Days"—or of Blake himself reading "Ah! Sun-flower", "The Sick Rose" and "The Little Girl Lost". The experience lasted several days, with him believing that he had witnessed the interconnectedness of the universe; Ginsberg recounted that after looking at latticework on the fire escape of the apartment and then at the sky, he intuited that one had been crafted by human beings, while the other had been crafted by itself. He explained that this hallucination was not inspired by drug use, but said he sought to recapture the feeling of interconnectedness later with various drugs. San Francisco Renaissance Ginsberg moved to San Francisco during the 1950s. Before Howl and Other Poems was published in 1956 by City Lights, he worked as a market researcher. In 1954, in San Francisco, Ginsberg met Peter Orlovsky (1933–2010), with whom he fell in love and who remained his lifelong partner. Selections from their correspondence have been published. Also in San Francisco, Ginsberg met members of the San Francisco Renaissance (James Broughton, Robert Duncan, Madeline Gleason and Kenneth Rexroth) and other poets who would later be associated with the Beat Generation in a broader sense. Ginsberg's mentor William Carlos Williams wrote an introductory letter to San Francisco Renaissance figurehead Kenneth Rexroth, who then introduced Ginsberg into the San Francisco poetry scene. There, Ginsberg also met three budding poets and Zen enthusiasts who had become friends at Reed College: Gary Snyder, Philip Whalen, and Lew Welch. In 1959, along with poets John Kelly, Bob Kaufman, A. D. Winans, and William Margolis, Ginsberg was one of the founders of the Beatitude poetry magazine. Wally Hedrick—a painter and co-founder of the Six Gallery—approached Ginsberg in mid-1955 and asked him to organize a poetry reading at the Six Gallery. At first, Ginsberg refused, but once he had written a rough draft of "Howl," he changed his "fucking mind," as he put it. Ginsberg advertised the event as "Six Poets at the Six Gallery." One of the most important events in Beat mythos, known simply as "The Six Gallery reading" took place on October 7, 1955. The event, in essence, brought together the East and West Coast factions of the Beat Generation. Of more personal significance to Ginsberg, the reading that night included the first public presentation of "Howl," a poem that brought worldwide fame to Ginsberg and to many of the poets associated with him. An account of that night can be found in Kerouac's novel The Dharma Bums, describing how change was collected from audience members to buy jugs of wine, and Ginsberg reading passionately, drunken, with arms outstretched. Ginsberg's principal work, "Howl," is well known for its opening line: "I saw the best minds of my generation destroyed by madness, starving hysterical naked [...]." "Howl" was considered scandalous at the time of its publication, because of the rawness of its language. Shortly after its 1956 publication by San Francisco's City Lights Bookstore, it was banned for obscenity. The ban became a cause célèbre among defenders of the First Amendment, and was later lifted, after Judge Clayton W. Horn declared the poem to possess redeeming artistic value. Ginsberg and Shig Murao, the City Lights manager who was jailed for selling "Howl," became lifelong friends. Biographical references in "Howl" Ginsberg claimed at one point that all of his work was an extended biography (like Kerouac's Duluoz Legend). "Howl" is not only a biography of Ginsberg's experiences before 1955, but also a history of the Beat Generation. Ginsberg also later claimed that at the core of "Howl" were his unresolved emotions about his schizophrenic mother. Though "Kaddish" deals more explicitly with his mother, "Howl" in many ways is driven by the same emotions. "Howl" chronicles the development of many important friendships throughout Ginsberg's life. He begins the poem with "I saw the best minds of my generation destroyed by madness", which sets the stage for Ginsberg to describe Cassady and Solomon, immortalizing them into American literature. This madness was the "angry fix" that society needed to function—madness was its disease. In the poem, Ginsberg focused on "Carl Solomon! I'm with you in Rockland", and, thus, turned Solomon into an archetypal figure searching for freedom from his "straightjacket". Though references in most of his poetry reveal much about his biography, his relationship to other members of the Beat Generation, and his own political views, "Howl," his most famous poem, is still perhaps the best place to start. To Paris and the "Beat Hotel", Tangier and India In 1957, Ginsberg surprised the literary world by abandoning San Francisco. After a spell in Morocco, he and Peter Orlovsky joined Gregory Corso in Paris. Corso introduced them to a shabby lodging house above a bar at 9 rue Gît-le-Cœur that was to become known as the Beat Hotel. They were soon joined by Burroughs and others. It was a productive, creative time for all of them. There, Ginsberg began his epic poem "Kaddish", Corso composed Bomb and Marriage, and Burroughs (with help from Ginsberg and Corso) put together Naked Lunch from previous writings. This period was documented by the photographer Harold Chapman, who moved in at about the same time, and took pictures constantly of the residents of the "hotel" until it closed in 1963. During 1962–1963, Ginsberg and Orlovsky travelled extensively across India, living half a year at a time in Calcutta (now Kolkata) and Benares (Varanasi). On his road to India he stayed two months in Athens ( August 29, 1961 - October 31, 1961) where he visited various cites such as Delphi, Mycines, Crete, and then he continued his journey to Israel, Kenya and finally India. Also during this time, he formed friendships with some of the prominent young Bengali poets of the time including Shakti Chattopadhyay and Sunil Gangopadhyay. Ginsberg had several political connections in India; most notably Pupul Jayakar who helped him extend his stay in India when the authorities were eager to expel him. England and the International Poetry Incarnation In May 1965, Ginsberg arrived in London, and offered to read anywhere for free. Shortly after his arrival, he gave a reading at Better Books, which was described by Jeff Nuttall as "the first healing wind on a very parched collective mind." Tom McGrath wrote: "This could well turn out to have been a very significant moment in the history of England—or at least in the history of English Poetry." Soon after the bookshop reading, plans were hatched for the International Poetry Incarnation, which was held at the Royal Albert Hall in London on June 11, 1965. The event attracted an audience of 7,000, who heard readings and live and tape performances by a wide variety of figures, including Ginsberg, Adrian Mitchell, Alexander Trocchi, Harry Fainlight, Anselm Hollo, Christopher Logue, George MacBeth, Gregory Corso, Lawrence Ferlinghetti, Michael Horovitz, Simon Vinkenoog, Spike Hawkins and Tom McGrath. The event was organized by Ginsberg's friend, the filmmaker Barbara Rubin. Peter Whitehead documented the event on film and released it as Wholly Communion. A book featuring images from the film and some of the poems that were performed was also published under the same title by Lorrimer in the UK and Grove Press in US. Continuing literary activity Though the term "Beat" is most accurately applied to Ginsberg and his closest friends (Corso, Orlovsky, Kerouac, Burroughs, etc.), the term "Beat Generation" has become associated with many of the other poets Ginsberg met and became friends with in the late 1950s and early 1960s. A key feature of this term seems to be a friendship with Ginsberg. Friendship with Kerouac or Burroughs might also apply, but both writers later strove to disassociate themselves from the name "Beat Generation." Part of their dissatisfaction with the term came from the mistaken identification of Ginsberg as the leader. Ginsberg never claimed to be the leader of a movement. He claimed that many of the writers with whom he had become friends in this period shared many of the same intentions and themes. Some of these friends include: David Amram, Bob Kaufman; Diane di Prima; Jim Cohn; poets associated with the Black Mountain College such as Charles Olson, Robert Creeley, and Denise Levertov; poets associated with the New York School such as Frank O'Hara and Kenneth Koch. LeRoi Jones before he became Amiri Baraka, who, after reading "Howl", wrote a letter to Ginsberg on a sheet of toilet paper. Baraka's independent publishing house Totem Press published Ginsberg's early work. Through a party organized by Baraka, Ginsberg was introduced to Langston Hughes while Ornette Coleman played saxophone. Later in his life, Ginsberg formed a bridge between the beat movement of the 1950s and the hippies of the 1960s, befriending, among others, Timothy Leary, Ken Kesey, Hunter S. Thompson, and Bob Dylan. Ginsberg gave his last public reading at Booksmith, a bookstore in the Haight-Ashbury neighborhood of San Francisco, a few months before his death. In 1993, Ginsberg visited the University of Maine at Orono to pay homage to the 90-year-old great Carl Rakosi. Buddhism and Krishna In 1950, Kerouac began studying Buddhism and shared what he learned from Dwight Goddard's Buddhist Bible with Ginsberg. Ginsberg first heard about the Four Noble Truths and such sutras as the Diamond Sutra at this time. Ginsberg's spiritual journey began early on with his spontaneous visions, and continued with an early trip to India with Gary Snyder. Snyder had previously spent time in Kyoto to study at the First Zen Institute at Daitoku-ji Monastery. At one point, Snyder chanted the Prajnaparamita, which in Ginsberg's words "blew my mind." His interest piqued, Ginsberg traveled to meet the Dalai Lama as well as the Karmapa at Rumtek Monastery. Continuing on his journey, Ginsberg met Dudjom Rinpoche in Kalimpong, who taught him: "If you see something horrible, don't cling to it, and if you see something beautiful, don't cling to it." After returning to the United States, a chance encounter on a New York City street with Chögyam Trungpa Rinpoche (they both tried to catch the same cab), a Kagyu and Nyingma Tibetan Buddhist master, led to Trungpa becoming his friend and lifelong teacher. Ginsberg helped Trungpa and New York poet Anne Waldman in founding the Jack Kerouac School of Disembodied Poetics at Naropa University in Boulder, Colorado. Ginsberg was also involved with Krishnaism. He had started incorporating chanting the Hare Krishna mantra into his religious practice in the mid-1960s. After learning that A. C. Bhaktivedanta Swami Prabhupada, the founder of the Hare Krishna movement in the Western world had rented a store front in New York, he befriended him, visiting him often and suggesting publishers for his books, and a fruitful relationship began. This relationship is documented by Satsvarupa dasa Goswami in his biographical account Srila Prabhupada Lilamrta. Ginsberg donated money, materials, and his reputation to help the Swami establish the first temple, and toured with him to promote his cause. Despite disagreeing with many of Bhaktivedanta Swami's required prohibitions, Ginsberg often sang the Hare Krishna mantra publicly as part of his philosophy and declared that it brought a state of ecstasy. He was glad that Bhaktivedanta Swami, an authentic swami from India, was now trying to spread the chanting in America. Along with other counterculture ideologists like Timothy Leary, Gary Snyder, and Alan Watts, Ginsberg hoped to incorporate Bhaktivedanta Swami and his chanting into the hippie movement, and agreed to take part in the Mantra-Rock Dance concert and to introduce the swami to the Haight-Ashbury hippie community. On January 17, 1967, Ginsberg helped plan and organize a reception for Bhaktivedanta Swami at San Francisco International Airport, where fifty to a hundred hippies greeted the Swami, chanting Hare Krishna in the airport lounge with flowers in hands. To further support and promote Bhaktivendata Swami's message and chanting in San Francisco, Allen Ginsberg agreed to attend the Mantra-Rock Dance, a musical event 1967 held at the Avalon Ballroom by the San Francisco Hare Krishna temple. It featured some leading rock bands of the time: Big Brother and the Holding Company with Janis Joplin, the Grateful Dead, and Moby Grape, who performed there along with the Hare Krishna founder Bhaktivedanta Swami and donated proceeds to the Krishna temple. Ginsberg introduced Bhaktivedanta Swami to some three thousand hippies in the audience and led the chanting of the Hare Krishna mantra. Music and chanting were both important parts of Ginsberg's live delivery during poetry readings. He often accompanied himself on a harmonium, and was often accompanied by a guitarist. It is believed that the Hindi and Buddhist poet Nagarjun had introduced Ginsberg to the harmonium in Banaras. According to Malay Roy Choudhury, Ginsberg refined his practice while learning from his relatives, including his cousin Savitri Banerjee. When Ginsberg asked if he could sing a song in praise of Lord Krishna on William F. Buckley, Jr.'s TV show Firing Line on September 3, 1968, Buckley acceded and the poet chanted slowly as he played dolefully on a harmonium. According to Richard Brookhiser, an associate of Buckley's, the host commented that it was "the most unharried Krishna I've ever heard." At the 1967 Human Be-In in San Francisco's Golden Gate Park, the 1968 Democratic National Convention in Chicago, and the 1970 Black Panther rally at Yale campus Allen chanted "Om" repeatedly over a sound system for hours on end. Ginsberg further brought mantras into the world of rock and roll when he recited the Heart Sutra in the song "Ghetto Defendant." The song appears on the 1982 album Combat Rock by British first wave punk band The Clash. Ginsberg came in touch with the Hungryalist poets of Bengal, especially Malay Roy Choudhury, who introduced Ginsberg to the three fish with one head of Indian emperor Jalaluddin Mohammad Akbar. The three fish symbolised coexistence of all thought, philosophy, and religion. In spite of Ginsberg's attraction to Eastern religions, the journalist Jane Kramer argues that he, like Whitman, adhered to an "American brand of mysticism" that was "rooted in humanism and in a romantic and visionary ideal of harmony among men." The Allen Ginsberg Estate and Jewel Heart International partnered to present "Transforming Minds: Kyabje Gelek Rimpoche and Friends", a gallery and online exhibition of images of Gelek Rimpoche by Allen Ginsberg, a student with whom he had an "indissoluble bond," in 2021 at Tibet House US in New York City. Fifty negatives from Ginsberg's Stanford University photo archive celebrated "the unique relationship between Allen and Rimpoche." The selection of never-before presented images, featuring great Tibetan masters including the Dalai Lama, Tibetologists, and students were "guided by Allen's extensive notes on the contact sheets and images he'd circled with the intention to print." Illness and death In 1960, he was treated for a tropical disease, and it is speculated that he contracted hepatitis from an unsterilized needle administered by a doctor, which played a role in his death 37 years later. Ginsberg was a lifelong smoker, and though he tried to quit for health and religious reasons, his busy schedule in later life made it difficult, and he always returned to smoking. In the 1970s, Ginsberg had two minor strokes which were first diagnosed as Bell's palsy, which gave him significant paralysis and stroke-like drooping of the muscles in one side of his face. Later in life, he also had constant minor ailments such as high blood pressure. Many of these symptoms were related to stress, but he never slowed down his schedule. Ginsberg won a 1974 National Book Award for The Fall of America (split with Adrienne Rich, Diving into the Wreck). In 1986, Ginsberg was awarded the Golden Wreath by the Struga Poetry Evenings International Festival in Macedonia, the second American poet to be so awarded since W. H. Auden. At Struga, Ginsberg met with the other Golden Wreath winners, Bulat Okudzhava and Andrei Voznesensky. In 1989, Ginsberg appeared in Rosa von Praunheim's award-winning film Silence = Death about the fight of gay artists in New York City for AIDS-education and the rights of HIV infected people. In 1993, the French Minister of Culture appointed Ginsberg a Chevalier des Arts et des Lettres. Ginsberg continued to help his friends as much as he could: he gave money to Herbert Huncke out of his own pocket, regularly supplied neighbor Arthur Russell with an extension cord to power his home recording setup, and housed a broke, drug-addicted Harry Smith. With the exception of a special guest appearance at the NYU Poetry Slam on February 20, 1997, Ginsberg gave what is thought to be his last reading at The Booksmith in San Francisco on December 16, 1996. After returning home from the hospital for the last time, where he had been unsuccessfully treated for congestive heart failure, Ginsberg continued making phone calls to say goodbye to nearly everyone in his address book. Some of the phone calls were sad and interrupted by crying, and others were joyous and optimistic. Ginsberg continued to write through his final illness, with his last poem, "Things I'll Not Do (Nostalgias)", written on March 30. He died on April 5, 1997, surrounded by family and friends in his East Village loft in Manhattan, succumbing to liver cancer via complications of hepatitis at the age of 70. Gregory Corso, Roy Lichtenstein, Patti Smith and others came by to pay their respects. He was cremated, and his ashes were buried in his family plot in Gomel Chesed Cemetery in Newark. He was survived by Orlovsky. In 1998, various writers, including Catfish McDaris read at a gathering at Ginsberg's farm to honor Allen and the Beats. Good Will Hunting (released in December 1997) was dedicated to Ginsberg, as well as Burroughs, who died four months later. Social and political activism Free speech Ginsberg's willingness to talk about taboo subjects made him a controversial figure during the conservative 1950s, and a significant figure in the 1960s. In the mid-1950s, no reputable publishing company would even consider publishing Howl. At the time, such "sex talk" employed in Howl was considered by some to be vulgar or even a form of pornography, and could be prosecuted under law. Ginsberg used phrases such as "cocksucker", "fucked in the ass", and "cunt" as part of the poem's depiction of different aspects of American culture. Numerous books that discussed sex were banned at the time, including Lady Chatterley's Lover. The sex that Ginsberg described did not portray the sex between heterosexual married couples, or even longtime lovers. Instead, Ginsberg portrayed casual sex. For example, in Howl, Ginsberg praises the man "who sweetened the snatches of a million girls." Ginsberg used gritty descriptions and explicit sexual language, pointing out the man "who lounged hungry and lonesome through Houston seeking jazz or sex or soup." In his poetry, Ginsberg also discussed the then-taboo topic of homosexuality. The explicit sexual language that filled Howl eventually led to an important trial on First Amendment issues. Ginsberg's publisher was brought up on charges for publishing pornography, and the outcome led to a judge going on record dismissing charges, because the poem carried "redeeming social importance," thus setting an important legal precedent. Ginsberg continued to broach controversial subjects throughout the 1970s, 1980s, and 1990s. From 1970 to 1996, Ginsberg had a long-term affiliation with PEN American Center with efforts to defend free expression. When explaining how he approached controversial topics, he often pointed to Herbert Huncke: he said that when he first got to know Huncke in the 1940s, Ginsberg saw that he was sick from his heroin addiction, but at the time heroin was a taboo subject and Huncke was left with nowhere to go for help. Role in Vietnam War protests Ginsberg was a signer of the anti-war manifesto "A Call to Resist Illegitimate Authority", circulated among draft resistors in 1967 by members of the radical intellectual collective RESIST. Other signers and RESIST members included Mitchell Goodman, Henry Braun, Denise Levertov, Noam Chomsky, William Sloane Coffin, Dwight Macdonald, Robert Lowell, and Norman Mailer. In 1968, Ginsberg signed the "Writers and Editors War Tax Protest" pledge, vowing to refuse tax payments in protest against the Vietnam War, and later became a sponsor of the War Tax Resistance project, which practiced and advocated tax resistance as a form of anti-war protest. He was present the night of the Tompkins Square Park riot (1988) and provided an eyewitness account to The New York Times. Relationship to communism Ginsberg talked openly about his connections with communism and his admiration for past communist heroes and the labor movement at a time when the Red Scare and McCarthyism were still raging. He admired Fidel Castro and many other Marxist figures from the 20th century. In "America" (1956), Ginsberg writes: "America, I used to be a communist when I was a kid I'm not sorry". Biographer Jonah Raskin has claimed that, despite his often stark opposition to communist orthodoxy, Ginsberg held "his own idiosyncratic version of communism." On the other hand, when Donald Manes, a New York City politician, publicly accused Ginsberg of being a member of the Communist Party, Ginsberg objected: "I am not, as a matter of fact, a member of the Communist party, nor am I dedicated to the overthrow of the U.S. government or any government by violence ... I must say that I see little difference between the armed and violent governments both Communist and Capitalist that I have observed". Ginsberg travelled to several communist countries to promote free speech. He claimed that communist countries, such as China, welcomed him because they thought he was an enemy of capitalism, but often turned against him when they saw him as a troublemaker. For example, in 1965 Ginsberg was deported from Cuba for publicly protesting the persecution of homosexuals. The Cubans sent him to Czechoslovakia, where one week after being named the Král majálesu ("King of May", a students' festivity, celebrating spring and student life), Ginsberg was arrested for alleged drug use and public drunkenness, and the security agency StB confiscated several of his writings, which they considered to be lewd and morally dangerous. Ginsberg was then deported from Czechoslovakia on May 7, 1965, by order of the StB. Václav Havel points to Ginsberg as an important inspiration. Gay rights One contribution that is often considered his most significant and most controversial was his openness about homosexuality. Ginsberg was an early proponent of freedom for gay people. In 1943, he discovered within himself "mountains of homosexuality." He expressed this desire openly and graphically in his poetry. He also struck a note for gay marriage by listing Peter Orlovsky, his lifelong companion, as his spouse in his Who's Who entry. Subsequent gay writers saw his frank talk about homosexuality as an opening to speak more openly and honestly about something often before only hinted at or spoken of in metaphor. In writing about sexuality in graphic detail and in his frequent use of language seen as indecent, he challenged—and ultimately changed—obscenity laws. He was a staunch supporter of others whose expression challenged obscenity laws (William S. Burroughs and Lenny Bruce, for example). Association with NAMBLA Ginsberg was a supporter and member of the North American Man/Boy Love Association (NAMBLA), a pedophilia and pederasty advocacy organization in the United States that works to abolish age of consent laws and legalize sexual relations between adults and children. Saying that he joined the organization "in defense of free speech", Ginsberg stated: "Attacks on NAMBLA stink of politics, witchhunting for profit, humorlessness, vanity, anger and ignorance ... I'm a member of NAMBLA because I love boys too—everybody does, who has a little humanity". In 1994, Ginsberg appeared in a documentary on NAMBLA called Chicken Hawk: Men Who Love Boys (playing on the gay male slang term "Chickenhawk"), in which he read a "graphic ode to youth". He read his poem "Sweet Boy, Gimme Yr Ass" from the book Mind Breaths. In her 2002 book Heartbreak, Andrea Dworkin claimed Ginsberg had ulterior motives for allying with NAMBLA. In reference to his onetime friend Dworkin, Ginsberg stated: Demystification of drugs Ginsberg talked often about drug use. He organized the New York City chapter of LeMar (Legalize Marijuana). Throughout the 1960s he took an active role in the demystification of LSD, and, with Timothy Leary, worked to promote its common use. He remained for many decades an advocate of marijuana legalization, and, at the same time, warned his audiences against the hazards of tobacco in his Put Down Your Cigarette Rag (Don't Smoke): "Don't Smoke Don't Smoke Nicotine Nicotine No / No don't smoke the official Dope Smoke Dope Dope." CIA drug trafficking Ginsberg worked closely with Alfred W. McCoy on the latter's book The Politics of Heroin in Southeast Asia, which claimed that the CIA was knowingly involved in the production of heroin in the Golden Triangle of Burma, Thailand, and Laos. In addition to working with McCoy, Ginsberg personally confronted Richard Helms, the director of the CIA in the 1970s, about the matter, but Helms denied that the CIA had anything to do with selling illegal drugs. Ginsberg wrote many essays and articles, researching and compiling evidence of the CIA's alleged involvement in drug trafficking, but it took ten years, and the publication of McCoy's book in 1972, before anyone took him seriously. In 1978, Ginsberg received a note from the chief editor of The New York Times, apologizing for not having taken his allegations seriously. The political subject is dealt with in his song/poem "CIA Dope calypso". The United States Department of State responded to McCoy's initial allegations stating that they were "unable to find any evidence to substantiate them, much less proof." Subsequent investigations by the Inspector General of the CIA, United States House Committee on Foreign Affairs, and United States Senate Select Committee to Study Governmental Operations with Respect to Intelligence Activities, a.k.a. the Church Committee, also found the charges to be unsubstantiated. Work Most of Ginsberg's very early poetry was written in formal rhyme and meter like that of his father, and of his idol William Blake. His admiration for the writing of Jack Kerouac inspired him to take poetry more seriously. In 1955, upon the advice of a psychiatrist, Ginsberg dropped out of the working world to devote his entire life to poetry. Soon after, he wrote Howl, the poem that brought him and his Beat Generation contemporaries to national attention and allowed him to live as a professional poet for the rest of his life. Later in life, Ginsberg entered academia, teaching poetry as Distinguished Professor of English at Brooklyn College from 1986 until his death. Inspiration from friends Ginsberg claimed throughout his life that his biggest inspiration was Kerouac's concept of "spontaneous prose." He believed literature should come from the soul without conscious restrictions. Ginsberg was much more prone to revise than Kerouac. For example, when Kerouac saw the first draft of Howl, he disliked the fact that Ginsberg had made editorial changes in pencil (transposing "negro" and "angry" in the first line, for example). Kerouac only wrote out his concepts of spontaneous prose at Ginsberg's insistence because Ginsberg wanted to learn how to apply the technique to his poetry. The inspiration for Howl was Ginsberg's friend, Carl Solomon, and Howl is dedicated to him. Solomon was a Dada and Surrealism enthusiast (he introduced Ginsberg to Artaud) who had bouts of clinical depression. Solomon wanted to commit suicide, but he thought a form of suicide appropriate to dadaism would be to go to a mental institution and demand a lobotomy. The institution refused, giving him many forms of therapy, including electroshock therapy. Much of the final section of the first part of Howl is a description of this. Ginsberg used Solomon as an example of all those ground down by the machine of "Moloch." Moloch, to whom the second section is addressed, is a Levantine god to whom children were sacrificed. Ginsberg may have gotten the name from the Kenneth Rexroth poem "Thou Shalt Not Kill," a poem about the death of one of Ginsberg's heroes, Dylan Thomas. Moloch is mentioned a few times in the Torah and references to Ginsberg's Jewish background are frequent in his work. Ginsberg said the image of Moloch was inspired by peyote visions he had of the Francis Drake Hotel in San Francisco which appeared to him as a skull; he took it as a symbol of the city (not specifically San Francisco, but all cities). Ginsberg later acknowledged in various publications and interviews that behind the visions of the Francis Drake Hotel were memories of the Moloch of Fritz Lang's film Metropolis (1927) and of the woodcut novels of Lynd Ward. Moloch has subsequently been interpreted as any system of control, including the conformist society of post-World War II America, focused on material gain, which Ginsberg frequently blamed for the destruction of all those outside of societal norms. He also made sure to emphasize that Moloch is a part of humanity in multiple aspects, in that the decision to defy socially created systems of control—and therefore go against Moloch—is a form of self-destruction. Many of the characters Ginsberg references in Howl, such as Neal Cassady and Herbert Huncke, destroyed themselves through excessive substance abuse or a generally wild lifestyle. The personal aspects of Howl are perhaps as important as the political aspects. Carl Solomon, the prime example of a "best mind" destroyed by defying society, is associated with Ginsberg's schizophrenic mother: the line "with mother finally fucked" comes after a long section about Carl Solomon, and in Part III, Ginsberg says: "I'm with you in Rockland where you imitate the shade of my mother." Ginsberg later admitted that the drive to write Howl was fueled by sympathy for his ailing mother, an issue which he was not yet ready to deal with directly. He dealt with it directly with 1959's Kaddish, which had its first public reading at a Catholic Worker Friday Night meeting, possibly due to its associations with Thomas Merton. Inspiration from mentors and idols Ginsberg's poetry was strongly influenced by Modernism (most importantly the American style of Modernism pioneered by William Carlos Williams), Romanticism (specifically William Blake and John Keats), the beat and cadence of jazz (specifically that of bop musicians such as Charlie Parker), and his Kagyu Buddhist practice and Jewish background. He considered himself to have inherited the visionary poetic mantle handed down from the English poet and artist William Blake, the American poet Walt Whitman and the Spanish poet Federico García Lorca. The power of Ginsberg's verse, its searching, probing focus, its long and lilting lines, as well as its New World exuberance, all echo the continuity of inspiration that he claimed. He corresponded with William Carlos Williams, who was then in the middle of writing his epic poem Paterson about the industrial city near his home. After attending a reading by Williams, Ginsberg sent the older poet several of his poems and wrote an introductory letter. Most of these early poems were rhymed and metered and included archaic pronouns like "thee." Williams disliked the poems and told Ginsberg, "In this mode perfection is basic, and these poems are not perfect." Though he disliked these early poems, Williams loved the exuberance in Ginsberg's letter. He included the letter in a later part of Paterson. He encouraged Ginsberg not to emulate the old masters, but to speak with his own voice and the voice of the common American. From Williams, Ginsberg learned to focus on strong visual images, in line with Williams' own motto "No ideas but in things." Studying Williams' style led to a tremendous shift from the early formalist work to a loose, colloquial free verse style. Early breakthrough poems include Bricklayer's Lunch Hour and Dream Record. Carl Solomon introduced Ginsberg to the work of Antonin Artaud (To Have Done with the Judgement of God and Van Gogh: The Man Suicided by Society), and Jean Genet (Our Lady of the Flowers). Philip Lamantia introduced him to other Surrealists and Surrealism continued to be an influence (for example, sections of "Kaddish" were inspired by André Breton's Free Union). Ginsberg claimed that the anaphoric repetition of Howl and other poems was inspired by Christopher Smart in such poems as Jubilate Agno. Ginsberg also claimed other more traditional influences, such as: Franz Kafka, Herman Melville, Fyodor Dostoevsky, Edgar Allan Poe, and Emily Dickinson. Ginsberg also made an intense study of haiku and the paintings of Paul Cézanne, from which he adapted a concept important to his work, which he called the Eyeball Kick. He noticed in viewing Cézanne's paintings that when the eye moved from one color to a contrasting color, the eye would spasm, or "kick." Likewise, he discovered that the contrast of two seeming opposites was a common feature in haiku. Ginsberg used this technique in his poetry, putting together two starkly dissimilar images: something weak with something strong, an artifact of high culture with an artifact of low culture, something holy with something unholy. The example Ginsberg most often used was "hydrogen jukebox" (which later became the title of a song cycle composed by Philip Glass with lyrics drawn from Ginsberg's poems). Another example is Ginsberg's observation on Bob Dylan during Dylan's hectic and intense 1966 electric-guitar tour, fueled by a cocktail of amphetamines, opiates, alcohol, and psychedelics, as a Dexedrine Clown. The phrases "eyeball kick" and "hydrogen jukebox" both show up in Howl, as well as a direct quote from Cézanne: "Pater Omnipotens Aeterna Deus". Inspiration from music Allen Ginsberg also found inspiration in music. He frequently included music in his poetry, invariably composing his tunes on an old Indian harmonium, which he often played during his readings. He wrote and recorded music to accompany William Blake's Songs of Innocence and Songs of Experience. He also recorded a handful of other albums. To create music for Howl and Wichita Vortex Sutra, he worked with the minimalist composer, Philip Glass. Ginsberg worked with, drew inspiration from, and inspired artists such as Bob Dylan, The Clash, Patti Smith, Phil Ochs, and The Fugs. He worked with Dylan on various projects and maintained a friendship with him over many years. In 1981, Ginsberg recorded a song called "Birdbrain." He was backed by the Gluons, and the track was released as a single. In 1996, he recorded a song co-written with Paul McCartney and Philip Glass, "The Ballad of the Skeletons", which reached number 8 on the Triple J Hottest 100 for that year. Style and technique From the study of his idols and mentors and the inspiration of his friends—not to mention his own experiments—Ginsberg developed an individualistic style that's easily identified as Ginsbergian. Ginsberg stated that Whitman's long line was a dynamic technique few other poets had ventured to develop further, and Whitman is also often compared to Ginsberg because their poetry sexualized aspects of the male form. Many of Ginsberg's early long line experiments contain some sort of anaphora, repetition of a "fixed base" (for example "who" in Howl, "America" in America) and this has become a recognizable feature of Ginsberg's style. He said later this was a crutch because he lacked confidence; he did not yet trust "free flight." In the 1960s, after employing it in some sections of Kaddish ("caw" for example) he, for the most part, abandoned the anaphoric form. 'Latter-Day Beat' Bob Dylan is known for using anaphora, as in 'Tangled Up in Blue' where the phrase, returned to at the end of every verse, takes the place of a chorus. Several of his earlier experiments with methods for formatting poems as a whole became regular aspects of his style in later poems. In the original draft of Howl, each line is in a "stepped triadic" format reminiscent of William Carlos Williams. He abandoned the "stepped triadic" when he developed his long line although the stepped lines showed up later, most significantly in the travelogues of The Fall of America. Howl and Kaddish, arguably his two most important poems, are both organized as an inverted pyramid, with larger sections leading to smaller sections. In America, he also experimented with a mix of longer and shorter lines. Ginsberg's mature style made use of many specific, highly developed techniques, which he expressed in the "poetic slogans" he used in his Naropa teaching. Prominent among these was the inclusion of his unedited mental associations so as to reveal the mind at work ("First thought, best thought." "Mind is shapely, thought is shapely.") He preferred expression through carefully observed physical details rather than abstract statements ("Show, don't tell." "No ideas but in things.") In these he carried on and developed traditions of modernism in writing that are also found in Kerouac and Whitman. In Howl and in his other poetry, Ginsberg drew inspiration from the epic, free verse style of the 19th-century American poet Walt Whitman. Both wrote passionately about the promise (and betrayal) of American democracy, the central importance of erotic experience, and the spiritual quest for the truth of everyday existence. J. D. McClatchy, editor of the Yale Review, called Ginsberg "the best-known American poet of his generation, as much a social force as a literary phenomenon." McClatchy added that Ginsberg, like Whitman, "was a bard in the old manner—outsized, darkly prophetic, part exuberance, part prayer, part rant. His work is finally a history of our era's psyche, with all its contradictory urges." McClatchy's barbed eulogies define the essential difference between Ginsberg ("a beat poet whose writing was [...] journalism raised by combining the recycling genius with a generous mimic-empathy, to strike audience-accessible chords; always lyrical and sometimes truly poetic") and Kerouac ("a poet of singular brilliance, the brightest luminary of a 'beat generation' he came to symbolise in popular culture [...] [though] in reality he far surpassed his contemporaries [...] Kerouac is an originating genius, exploring then answering—like Rimbaud a century earlier, by necessity more than by choice—the demands of authentic self-expression as applied to the evolving quicksilver mind of America's only literary virtuoso [...]"). Bibliography Howl and Other Poems (1956), Kaddish and Other Poems (1961), Empty Mirror: Early Poems (1961), Reality Sandwiches (1963), The Yage Letters (1963)with William S. Burroughs Planet News (1968), Indian Journals (1970), First Blues: Rags, Ballads & Harmonium Songs 1971 - 1974 (1975), The Gates of Wrath: Rhymed Poems 1948–1951 (1972), The Fall of America: Poems of These States (1973), Iron Horse (1973) Allen Verbatim: Lectures on Poetry, Politics, Consciousness by Allen Ginsberg (1974), edited by Gordon Ball, Sad Dust Glories: poems during work summer in woods (1975) Mind Breaths (1978), Plutonian Ode: Poems 1977–1980 (1981), Collected Poems 1947–1980 (1984), . Republished with later material added as Collected Poems 1947-1997, New York, HarperCollins, 2006 White Shroud Poems: 1980–1985 (1986), Cosmopolitan Greetings Poems: 1986–1993 (1994) Howl Annotated (1995) Illuminated Poems (1996) Selected Poems: 1947–1995 (1996) Death and Fame: Poems 1993–1997 (1999) Deliberate Prose 1952–1995 (2000) Howl & Other Poems 50th Anniversary Edition (2006), The Book of Martyrdom and Artifice: First Journals and Poems 1937-1952 (Da Capo Press, 2006) The Selected Letters of Allen Ginsberg and Gary Snyder (Counterpoint, 2009) I Greet You at the Beginning of a Great Career: The Selected Correspondence of Lawrence Ferlinghetti and Allen Ginsberg, 1955–1997 (City Lights, 2015) The Best Minds of My Generation: A Literary History of the Beats (Grove Press, 2017) Honors His collection The Fall of America shared the annual U.S. National Book Award for Poetry in 1974. In 1979, he received the National Arts Club gold medal and was inducted into the American Academy and Institute of Arts and Letters. Ginsberg was a Pulitzer Prize finalist in 1995 for his book Cosmopolitan Greetings: Poems 1986–1992. In 1993, he received a John Jay Award posthumously from Columbia. In 2014, Ginsberg was one of the inaugural honorees in the Rainbow Honor Walk, a walk of fame in San Francisco's Castro neighborhood noting LGBTQ people who have "made significant contributions in their fields." See also The Life and Times of Allen Ginsberg (film) :Category:Works by Allen Ginsberg Allen Ginsberg Live in London Hungry generation Howl (2010 film) LGBT culture in New York City List of LGBT people from New York City Central Park Be-In Trevor Carolan Counterculture of the 1960s Burroughs: the Movie by Howard Brookner List of peace activists Kill Your Darlings Jewish Buddhist American poetry Notes References Resources The Allen Ginsberg Papers, 1937–1994 (1,330 linear ft.) are housed in the Department of Special Collections and University Archives at Stanford University Libraries Further reading Boer, Charles. Charles Olson in Connecticut. North Carolina Wesleyan College Press, 1991, (1975). . Bullough, Vern L. "Before Stonewall: Activists for Gay and Lesbian Rights in Historical Context." Harrington Park Press, 2002. pp 304–311. Charters, Ann (ed.). The Portable Beat Reader. Penguin Books. New York. 1992. (hc); (pbk) Clark, Thomas. "Allen Ginsberg." Writers at WorkThe Paris Review Interviews. 3.1 (1968) pp. 279–320. Collins, Ronald & Skover, David. Mania: The Story of the Outraged & Outrageous Lives that Launched a Cultural Revolution (Top-Five books, March 2013) Gifford, Barry (ed.). As Ever: The Collected Letters of Allen Ginsberg & Neal Cassady. Berkeley: Creative Arts Books (1977). Ginsberg, Allen. Travels with Ginsberg: A Postcard Book. San Francisco: City Lights (2002). Hrebeniak, Michael. Action Writing: Jack Kerouac's Wild Form, Carbondale, IL: Southern Illinois UP, 2006. Kashner, Sam, When I Was Cool, My Life at the Jack Kerouac School, New York: HarperCollins Perennial, 2005. Podhoretz, Norman. "At War with Allen Ginsberg", in Ex-Friends (Free Press, 1999), 22–56. . McBride, Dick: Cometh With Clouds (Memory: Allen Ginsberg) Cherry Valley Editions, 1982 Morgan, Bill (ed.), I Greet You at the Beginning of a Great Career: The Selected Correspondence of Lawrence Ferlinghetti and Allen Ginsberg, 1955–1997. San Francisco: City Lights Publishers, 2015. Schumacher, Michael (ed.). Family Business: Selected Letters Between a Father and Son. Bloomsbury (2002), paperback, 448 pages, Schumacher, Michael. Dharma Lion: A Biography of Allen Ginsberg. New York: St. Martin's Press, 1994. Trigilio, Tony. Allen Ginsberg's Buddhist Poetics. Carbondale, IL: Southern Illinois University Press, 2007. Trigilio, Tony. "Strange Prophecies Anew": Rereading Apocalypse in Blake, H.D., and Ginsberg. Madison, NJ: Fairleigh Dickinson University Press, 2000. . Tytell, John. Naked Angels: Kerouac, Ginsberg, Burroughs. Chicago: Ivan R. Dee, 1976. Warner, Simon (ed.). Howl for Now: A 50th anniversary celebration of Allen Ginsberg's epic protest poem. West Yorkshire, UK: Route (2005), paperback, 144 pages, Warner, Simon. "Raising the Consciousness? Re-visiting Allen Ginsberg's 1965 trip to Liverpool", chapter in Centre of the Creative Universe: Liverpool and the Avant Garde, edited by Christoph Grunenberg and Robert Knifton. Liverpool & Chicago: Liverpool University Press & Chicago University Press, 2007, (pbk); (hc) Young, Allen Gay Sunshine interview with Allen Ginsberg. Grey Fox Press, 1974. First Thought is Best Thought, an interview with Allen Ginsberg, in Scottish International Volume 6, September 1973, pp. 18–23 External links Archives George Dowden papers on the Allen Ginsberg bibliography, 1966–1971 at Rare Book and Manuscripts Library, Columbia University Libraries Materials related to Allen Ginsberg in the Robert A. Wilson collection at Special Collections, University of Delaware Library Allen Ginsberg papers at Special Collections and University Archives, Stanford Libraries Audio recordings and interviews Audio recordings of Allen Ginsberg, from the Woodberry Poetry Room, Harvard University Audio recordings of Allen Ginsberg, from Maryland Institute College of Art's Decker Library, Internet Archive Modern American Poetry , interview Other links The Allen Ginsberg Trust Case Histories: Allen Ginsberg at PEN.org honoring Ginsberg's work, from PEN American Center Allen Ginsberg on Poets.org With audio clips, poems, and related essays, from the Academy of American Poets "After 50 Years, Ginsberg's Howl Still Resonates" NPR October 27, 2006 Allen Ginsberg photographs with hand-written captions at LensCulture Autobiographical Article in Shambhala Sun Magazine FBI agents were warned against interviewing Allen Ginsberg, fearing it would result in "embarrassment" from MuckRock.com Allen Ginsberg materials in "Beat Visions and the Counterculture" (online exhibition) at Special Collections, University of Delaware Library 1926 births 1997 deaths 20th-century American male writers 20th-century American poets 20th-century Buddhists Activists from New York (state) American anti–nuclear weapons activists American anti–Vietnam War activists American cannabis activists American expatriates in France American gay writers American LGBT poets American LGBT rights activists American male poets American pacifists American people of Russian-Jewish descent American psychedelic drug advocates American sailors American spoken word artists American tax resisters Beat Generation poets Brooklyn College faculty Columbia College (New York) alumni Converts to Buddhism Deaths from cancer in New York (state) Deaths from liver cancer Eastside High School (Paterson, New Jersey) alumni English-language haiku poets Free speech activists Gay academics Gay poets Harmonium players Industrial Workers of the World members Jewish American military personnel Jewish American poets LGBT Buddhists LGBT Jews LGBT people from Colorado LGBT people from New Jersey LGBT people from New York (state) Locust Music artists Military personnel from New Jersey Montclair State University alumni National Book Award winners Obscenity controversies in literature Outlaw poets Pedophile advocacy Pedophilia in the United States Writers from Greenwich Village Writers from the East Village, Manhattan Poets from New Jersey Postmodern writers Struga Poetry Evenings Golden Wreath laureates Tibetan Buddhists from the United States Transatlantic Records artists United States Merchant Mariners of World War II Writers from Boulder, Colorado Writers from Newark, New Jersey Writers from Paterson, New Jersey Yippies National Arts Club Medal of Honor Recipients

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https://en.wikipedia.org/wiki/Auto%20racing

Auto racing

Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. Auto racing has existed since the invention of the automobile. Races of various sorts were organised, with the first recorded as early as 1867. Many of the earliest events were effectively reliability trials, aimed at proving these new machines were a practical mode of transport, but soon became an important way for automobile makers to demonstrate their machines. By the 1930s, specialist racing cars had developed. There are now numerous different categories, each with different rules and regulations. History The first prearranged match race of two self-powered road vehicles over a prescribed route occurred at 4:30 A.M. on August 30, 1867, between Ashton-under-Lyne and Old Trafford, England, a distance of . It was won by the carriage of Isaac Watt Boulton. Internal combustion auto racing events began soon after the construction of the first successful gasoline-fueled automobiles. The first organized contest was on April 28, 1887, by the chief editor of Paris publication , Monsieur Fossier. It ran from Neuilly Bridge to the Bois de Boulogne. On July 22, 1894, the Parisian magazine organized what is considered to be the world's first motoring competition, from Paris to Rouen. One hundred and two competitors paid a 10-franc entrance fee. The first American automobile race is generally held to be the Thanksgiving Day Chicago Times-Herald race of November 28, 1895. Press coverage of the event first aroused significant American interest in the automobile. The Targa Florio was an open road endurance automobile race held in the mountains of Sicily, Italy near the island's capital of Palermo. Founded in 1906, it was the oldest sports car racing event, part of the World Sportscar Championship between 1955 and 1973. The oldest surviving sports car racing event is the 24 Hours of Le Mans, begun in 1923. It is run by the Automobile Club of the West (ACO). Team Ferrari won the race in 2023. With auto construction and racing dominated by France, the French automobile club ACF staged a number of major international races, usually from or to Paris, connecting with another major city, in France or elsewhere in Europe. Aspendale Racecourse, in Australia, was the world's first purpose-built motor racing circuit, opening in January 1906. The pear-shaped track was close to a mile in length, with slightly banked curves and a gravel surface of crushed cement. Brooklands, in Surrey, England, was the first purpose-built 'banked' motor racing venue, opening in June 1907. It featured a concrete track with high-speed banked corners. One of the oldest existing purpose-built automobile racing circuits in the United States, still in use, is the Indianapolis Motor Speedway in Speedway, Indiana. It is the largest capacity sports venue of any variety worldwide, with a top capacity of some 257,000+ seated spectators. NASCAR was founded by Bill France Sr. on February 21, 1948, with the help of several other drivers of the time. The first NASCAR "Strictly Stock" race ever was held on June 19, 1949, at Daytona Beach, Florida, U.S.. From 1962, sports cars temporarily took a back seat to GT cars, with the (FIA) replacing the World Championship for Sports Cars with the International Championship for GT Manufacturers. From 1962 through 2003, NASCAR's premier series was called the Winston Cup Series, sponsored by R. J. Reynolds Tobacco Company cigarette brand Winston. The changes that resulted from RJR's involvement, as well as the reduction of the schedule from 56 to 34 races a year, established 1972 as the beginning of NASCAR's "modern era". The IMSA GT Series evolved into the American Le Mans Series, which ran its first season in 1998. The European races eventually became the closely related European Le Mans Series, both of which mix prototypes and GTs. (TC) is a popular touring car racing series in Argentina, and one of the oldest car racing series still active in the world. The first TC competition took place in 1931 with 12 races, each in a different province. Future Formula One star Juan Manuel Fangio (Chevrolet) won the 1940 and 1941 editions of the TC. It was during this time that the series' Chevrolet-Ford rivalry began, with Ford acquiring most of its historical victories. Over the last few years, auto racing has seen a transformative shift, echoing past pivots. The industry, much like the cars it champions, has had to navigate through the hairpin turns of a global pandemic and a persistent chip shortage, each threatening to derail production schedules. At the same time, a new course is being charted towards an electric future, a dramatic change in direction that's challenging the old guard of gasoline engines. There is also a growing number of events for electric racing cars, such as the Formula E,the Eco Grand Prix or the Electric GT Championship. Categories Open-wheel racing In single-seater (open-wheel) racing, the wheels are not covered, and the cars often have aerofoil wings front and rear to produce downforce and enhance adhesion to the track. The two most popular varieties of open-wheel road racing are Formula One and the IndyCar Series. In Europe and Asia, open-wheeled racing is commonly referred to as 'Formula', with appropriate hierarchical suffixes. In North America, the 'Formula' terminology is not followed (with the exception of F1). The sport is usually arranged to follow an international format (such as F1), a regional format (such as the Formula 3 Euro Series), and/or a domestic, or country-specific, format (such as the German Formula 3 championship, or the British Formula Ford). F1 is a worldwide series that runs only street circuit and race tracks. These cars are heavily based on technology and their aerodynamics. The speed record was set in 2005 by Juan Pablo Montoya hitting 373 km/h (232 mph). Some of the most prominent races are the Monaco Grand Prix, the Italian Grand Prix, and the British Grand Prix. The season ends with the crowning of the World Championship for drivers and constructors. In the United States, the most popular series is the IndyCar Series. The cars have traditionally been similar to, though less technologically sophisticated than, F1 cars, with more restrictions on technology aimed at controlling costs. While these cars are not as technologically advanced, they are faster, mainly because they compete on oval race tracks, being able to average a lap at 388 km/h (241 mph). The series' biggest race is the Indianapolis 500, which is commonly referred to as "The Greatest Spectacle in Racing" due to being the longest continuously run race and having the largest crowd for a single-day sporting event (350,000+). The other major international single-seater racing series is Formula 2 (formerly known as Formula 3000 and GP2 Series). Regional series include Super Formula and Formula V6 Asia (specifically in Asia), Formula Renault 3.5 (also known as the World Series by Renault, succession series of World Series by Nissan), Formula Three, Formula Palmer Audi and Formula Atlantic. In 2009, the FIA Formula Two Championship brought about the revival of the F2 series. Domestic, or country-specific, series include Formula Three and Formula Renault, with the leading introductory series being Formula Ford. Single-seater racing is not limited merely to professional teams and drivers. There exist many amateur racing clubs. In the UK, the major club series are the Monoposto Racing Club, BRSCC F3 (Formerly ClubF3, formerly ARP F3), Formula Vee and Club Formula Ford. Each series caters to a section of the market, with some primarily providing low-cost racing, while others aim for an authentic experience using the same regulations as the professional series (BRSCC F3). There are other categories of single-seater racing, including kart racing, which employs a small, low-cost machine on small tracks. Many of the current top drivers began their careers in karts. Formula Ford represents the most popular first open-wheel category for up-and-coming drivers stepping up from karts. The series is still the preferred option, as it has introduced an aero package and slicks, allowing the junior drivers to gain experience in a race car with dynamics closer to F1. The Star Mazda Series is another entry-level series. Students at colleges and universities can also take part in single-seater racing through the Formula SAE competition, which involves designing and building a single-seater car in a multidisciplinary team and racing it at the competition. This also develops other soft skills, such as teamwork, while promoting motorsport and engineering. The world's first all-female Formula racing team was created in 2006. The group was an assemblage of drivers from different racing disciplines and formed for an MTV reality pilot, which was shot at Mazda Raceway Laguna Seca. In December 2005, the FIA gave approval to Superleague Formula racing, which debuted in 2008, whereby the racing teams are owned and run by prominent sports clubs such as A.C. Milan and Liverpool F.C. After 25 years away from the sport, former Formula 2 champion Jonathan Palmer reopened the F2 category again; most drivers have graduated from the Formula Palmer Audi series. The category is officially registered as the FIA Formula Two championship. Most rounds have two races and are support races to the FIA World Touring Car Championship. Touring car racing Touring car racing is a style of road racing that is run with production-derived four-seat race cars. The lesser use of aerodynamics means following cars have a much easier time passing than in open-wheel racing. It often features full-contact racing with subtle bumping and nudging due to the small speed differentials and large grids. The major touring car championships conducted worldwide are the Supercars Championship (Australia), British Touring Car Championship, Deutsche Tourenwagen Masters (DTM), World Touring Car Championship and the World Touring Car Cup. The European Touring Car Cup is a one-day event open to Super 2000 specification touring cars from Europe's many national championships. The Sports Car Club of America's SPEED World Challenge Touring Car and GT championships are dominant in North America. America's historic Trans-Am Series is undergoing a period of transition, but is still the longest-running road racing series in the U.S. The National Auto Sport Association also provides a venue for amateurs to compete in home-built factory-derived vehicles on various local circuits. Sports car racing In sports car racing, production-derived versions of two-seat sports cars, also known as grand tourers (GTs), and purpose-built sports prototype cars compete within their respective classes on closed circuits. The premier championship series of sports car racing is the FIA World Endurance Championship. The main series for GT car racing is the GT World Challenge Europe, divided into two separate championships: the GT World Challenge Europe Sprint Cup and the GT World Challenge Europe Endurance Cup. This series has formed after the folding of the various FIA GT championships. Other major GT championships include the GT World Challenge America, GT World Challenge Asia, Super GT, and the International GT Open. There are minor regional and national GT series using mainly GT4 and GT3 cars featuring both amateur and professional drivers. Sports prototypes, unlike GT cars, do not rely on road-legal cars as a base. They are closed-wheel and often closed-cockpit purpose-built race cars intended mainly for endurance racing. They have much lower weight and more downforce compared to GT cars, making them much faster. They are raced in the 24 hours of Le Mans (held annually since 1923) and in the (European) Le Mans series, Asian Le Mans Series and the WeatherTech SportsCar Championship. These cars are referred to as LMP (Le Mans prototype) cars with LMP1 being run mainly by manufacturers and the slightly less powerful LMP2 cars run by privateer teams. All three Le Mans Series run GT cars in addition to Le Mans Prototypes; these cars have different restrictions than the FIA GT cars. Another prototype and GT racing championship exists in the United States; the Grand-Am, which began in 2000, sanctions its own endurance series, the Rolex Sports Car Series, which consists of slower and lower-cost race cars compared to LMP and FIA GT cars. The Rolex Sports Car Series and American Le Mans Series announced a merger between the two series forming the WeatherTech SportsCar Championship starting in 2014. These races are often conducted over long distances, at least , and cars are driven by teams of two or more drivers, switching every few hours. Due to the performance difference between production-based sports cars and purpose-built sports prototypes, one race usually involves several racing classes, each fighting for its own championship. Famous sports car races include the 24 Hours of Le Mans, the Rolex 24 at Daytona, 24 Hours of Spa-Franchorchamps, the 12 Hours of Sebring, the 6 Hours of Watkins Glen, and the Petit Le Mans at Road Atlanta. There is also the 24 Hours of the Nürburgring on the infamous Nordschleife track and the Dubai 24 Hour, which is aimed at GT3 and below cars with a mixture of professional and pro-am drivers. Production-car racing Production-car racing, otherwise known as "showroom stock" in the US, is an economical and rules-restricted version of touring-car racing, mainly used to restrict costs. Numerous production racing categories are based on particular makes of cars. Most series, with a few exceptions, follow the Group N regulation. There are several different series that are run all over the world, most notably, Japan's Super Taikyu and IMSA's Firehawk Series, which ran in the 1980s and 1990s all over the United States. Stock car racing In North America, stock car racing is the most popular form of auto racing. Primarily raced on oval tracks, stock cars vaguely resemble production cars, but are in fact purpose-built racing machines that are built to tight specifications and, together with touring cars, also called Silhouette racing cars. The largest stock car racing governing body is NASCAR (National Association for Stock Car Auto Racing). NASCAR's premier series is the NASCAR Cup Series, its most famous races being the Daytona 500, the Southern 500, the Coca-Cola 600, and the Brickyard 400. NASCAR also runs several feeder series, including the Xfinity Series and Gander RV & Outdoors Truck Series (a pickup truck racing series). The series conduct races across the entire continental United States. The NASCAR Pinty's Series conducts races across Canada and the NASCAR PEAK Mexico Series conducts races across Mexico. NASCAR also governs several smaller regional series, such as the Whelen Modified Tour. Modified cars are best described as open-wheel cars. Modified cars have no parts related to the stock vehicle for which they are named after. A number of modified cars display a "manufacturer's" logo and "vehicle name", yet use components produced by another automobile manufacturer. There are also other stock car governing bodies, most notably the Automobile Racing Club of America (ARCA). In the UK, British Stock car racing is also referred to as "Short Circuit Racing". UK Stock car racing started in the 1950s and grew rapidly through the 1960s and 1970s. Events take place on shale or tarmac tracks – usually around 1/4 mile long. There are around 35 tracks in the UK and upwards of 7000 active drivers. The sport is split into three basic divisions – distinguished by the rules regarding car contact during racing. The most famous championship are the BriSCA F1 Stock Cars. Full-contact formulas include Bangers, Bombers, and Rookie Bangers – and racing features Demolition Derbies, Figure of Eight, and Oval Racing. Semi Contact Formulas include BriSCA F1, F2, and Superstox – where bumpers are used tactically. Non-contact formulas include National Hot Rods, Stock Rods, and Lightning Rods. One-make racing One-make, or single marque, championships often employ production-based cars from a single manufacturer or even a single model from a manufacturer's range. There are numerous notable one-make formulae from various countries and regions, some of which – such as the Porsche Supercup and, previously, IROC – have fostered many distinct national championships. Single marque series are often found at the club level, to which the production-based cars, limited modifications, and close parity in performance are very well suited. Some of the better-known single-make series are the Mini 7 Championship (Europe's longest-running one-make championship), the Radical European Masters, John Cooper Mini Challenge, Clio Cup, Ginettas, Caterhams, BMWs, and MX5s. There are also single-chassis single seater formulae, such as Formula Renault and Formula BMW, usually as "feeder" series for "senior" race formula (in the fashion of farm teams). Drag racing In drag racing, the objective is to complete a given straight-line distance, from a standing start, ahead of a vehicle in a parallel lane. This distance is traditionally , though has become popular since the 1990s. The vehicles may or may not be given the signal to start at the same time, depending on the class of racing. Vehicles range from the everyday car to the purpose-built dragster. Speeds and elapsed time differ from class to class. Average street cars cover the mile in 12 to 16 seconds, whereas a top fuel dragster takes 4.5 seconds or less, reaching speeds of up to . Drag racing was organized as a sport by Wally Parks in the early 1950s through the National Hot Rod Association (NHRA). The NHRA was formed to discourage street racing. When launching, a top fuel dragster will accelerate at 3.4 g (33 m/s2), and when braking parachutes are deployed the deceleration is 4 g (39 m/s2), more than the Space Shuttle experiences. A top fuel car can be heard over away and can generate a reading from 1.5 to 3.9 on the Richter scale. Drag racing is two cars head-to-head, the winner proceeding to the next round. Professional classes are all first to the finish line wins. Sportsman racing is handicapped (slower car getting a head start) using an index (a lowest e.t. allowed), and cars running under (quicker than) their index "break out" and lose. The slowest cars, bracket racers, are also handicapped, but rather than an index, they use a dial-in. Off-road racing In off-road racing, various classes of specially modified vehicles, including cars, compete in races through off-road environments. In North America these races often take place in the desert, such as the famous Baja 1000. Another format for off-road racing happens on closed-course short course tracks such as Crandon International Off-Road Raceway. In the 1980s and 1990s, the short course was extended to racing inside stadiums in the Mickey Thompson Entertainment Group; this format was revived by Robby Gordon in 2013 with his Stadium Super Trucks series. In Europe, "offroad" refers to events such as autocross or rallycross, while desert races and rally-raids such as the Paris-Dakar, Master Rallye or European "bajas" are called "cross-country rallies". Kart racing The modern kart was invented by Art Ingels, a fabricator at the Indianapolis-car manufacturer Kurtis-Kraft, in Southern California in 1956. Ingels took a small chainsaw engine and mounted it to a simple tube-frame chassis weighing less than 100 lb. Ingels, and everyone else who drove the kart, were startled at its performance capabilities. The sport soon blossomed in Southern California, and quickly spread around the world. Although often seen as the entry point for serious racers into the sport, kart racing, or karting, can be an economical way for amateurs to try racing and is also a fully-fledged international sport in its own right. A large proportion of professional racing drivers began in karts, often from a very young age, such as Michael Schumacher and Fernando Alonso. Several former motorcycle champions have also taken up the sport, notably Wayne Rainey, who was paralysed in a racing accident and now races a hand-controlled kart. As one of the cheapest ways to race, karting is seeing its popularity grow worldwide. Despite their diminutive size, karts of the most powerful class, superkart (assuming a weight of 205 kg (452 lb), and a power output of 100 hp (75 kW)), can have a power-to-weight ratio (including the driver) of 490 hp/tonne (0.22 hp/lb). Without the driver, this figure doubles, to almost 980 hp/tonne (0.44 hp/lb). Historical racing Historic motorsport or vintage motorsport uses vehicles limited to a particular era. Only safety precautions are modernized in these hobbyist races. A historical event can be of various types of motorsport disciplines, from road racing to rallying. Because it is based on a particular era it is more hobbyist-oriented, reducing corporate sponsorship. The only modern equipment used is related to safety and timing. A historical event can be of a number of different motorsport disciplines. Some of the most famous events include the Goodwood Festival of Speed and Goodwood Revival in Britain and Monterey Historic in the United States. Championships range from "grass root" Austin Seven racing to the FIA Thoroughbred Grand Prix Championship for classic Formula One chassis. While there are several professional teams and drivers in historical racing, this branch of auto sport tends to be contested by wealthy car owners and is thus more amateur and less competitive in its approach. Other categories Use of flags In many types of auto races, particularly those held on closed courses, flags are displayed to indicate the general status of the track and to communicate instructions to competitors. While individual series have different rules, and the flags have changed from the first years (e.g., red used to start a race), these are generally accepted. Accidents The worst accident in racing history is the 1955 Le Mans disaster, where more than 80 people died, including the French driver Pierre Levegh. Racing-car setup In auto racing, the racing setup or car setup is the set of adjustments made to the vehicle to optimize its behaviour (performance, handling, reliability, etc.). Adjustments can occur in suspensions, brakes, transmissions, engines, tires, and many others. Aerodynamics Aerodynamics and airflow play big roles in the setup of a race car. Aerodynamic downforce improves the race car's handling by lowering the center of gravity and distributing the weight of the car equally on each tire. Once this is achieved, fuel consumption decreases and the forces against the car are significantly lowered. Many aerodynamic experiments are conducted in wind tunnels, to simulate real-life situations while measuring the various drag forces on the car. These "Rolling roads" produce many wind situations and direct air flow at certain speeds and angles. When a diffuser is installed under the car, the amount of drag force is significantly lowered, and the overall aerodynamics of the vehicle is positively adjusted. Wings and canards channel the airflow in the most efficient way to get the least amount of drag from the car. It is experimentally proven that downforce is gained and the vehicle's handling is considerably changed when aerodynamic wings on the front and rear of the vehicle are installed. Suspension Suspension plays a huge part in giving the race car the ability to be driven optimally. Shocks are mounted vertically or horizontally to prevent the body from rolling in the corners. The suspension is important because it makes the car stable and easier to control and keeps the tires on the road when driving on uneven terrain. It works in three different ways including vertically, longitudinally, and laterally to control movement when racing on various tracks. Tyres Tyres called R-Compounds are commonly used in motorsports for high amounts of traction. The soft rubber allows them to expand when they are heated up, making more surface area on the pavement, therefore producing the most traction. These types of tyres do not have grooves on them. Tyre pressure is dependent on the temperature of the tyre and track when racing. Each time a driver pulls into the pits, the tyre pressure and temperature should be tested for optimal performance. When the tyres get too hot they will swell or inflate and need to be deflated to the correct pressure. When the tyres are not warmed up they will not perform as well. Brakes Brakes on a race car are imperative in slowing and stopping the car at precise times and wear quickly depending on the road or track on which the car is being raced, how many laps are being run, track conditions due to weather, and how many caution runs require more braking. There are three variables to consider in racing: brake pedal displacement, brake pedal force, and vehicle deceleration. Various combinations of these variables work together to determine the stiffness, sensitivity, and pedal force of the brakes. When using the brakes effectively, the driver must go through a buildup phase and end with a modulating phase. These phases include attaining maximum deceleration and modulating the brake pressure. Brake performance is measured in bite and consistency. Bite happens when the driver first applies the brakes and they have not warmed up to the correct temperature to operate efficiently. Consistency is measured in how consistent the friction is during the entire time of braking. These two measurements determine the wear of the brakes. Engine The race car's engine needs a considerable amount of air to produce maximum power. The air intake manifold sucks the air from scoops on the hood and front bumper and feeds it into the engine. Many engine modifications to increase horsepower and efficiency are commonly used in many racing-sanctioning bodies. Engines are tuned on a machine called a dynamometer, which is commonly known in the racing world as a DYNO. The car is driven onto the DYNO and many gauges and sensors are hooked up to the car that are controlled by an online program to test force, torque, or power. Through the testing, the car's engine maps can be changed to get the most horsepower and ultimately speed out of the vehicle. Racing drivers Racing drivers, at the highest levels, are usually paid by the team, or by sponsors, and can command very substantial salaries. Contrary to what may be popularly assumed, racing drivers as a group do not have unusually better reflexes or peripheral response time. During repeated physiological (and psychological) evaluations of professional racing drivers, the two characteristics that stand out are racers' near-obsessive need to control their surroundings (the psychological aspect), and an unusual ability to process fast-moving information (physiological). In this, researchers have noted a strong correlation between racers' psychological profiles and those of fighter pilots. In tests comparing racers to members of the general public, the greater the complexity of the information processing matrix, the greater the speed gap between racers and the public. Due partly to the performance capabilities of modern racing cars, racing drivers require a high level of fitness, focus, and the ability to concentrate at high levels for long periods in an inherently difficult environment. Racing drivers mainly complain about pains in the lumbar, shoulder, and neck regions. Racing drivers experience extremely large g-forces because formula cars and sports prototypes generate more downforce and are able to corner at significantly higher speeds. Formula 1 drivers routinely experience g-loadings in excess of 4.5 g. See also Outline of auto racing List of auto racing tracks Motorcycle racing Race track List of auto racing films Racing video game References External links Sanctioning bodies Motorsports UK Association American Le Mans Series (ALMS) Indy Racing League (IRL) Fédération Internationale de l'Automobile (FIA) Grand American Road Racing Association International Conference of Sports Car Clubs (ICSCC) International Hot Rod Association (IHRA) International Motor Sports Association (IMSA) National Auto Sport Association National Association for Stock Car Auto Racing (NASCAR) National Hot Rod Association (NHRA) No Prep Racing SCORE International Off-Road Racing Sports Car Club of America (SCCA) United States Auto Club (USAC) Formula One (F1) Confederation of Australian Motorsport (CAMS) Best In The Desert Off-Road Racing

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https://en.wikipedia.org/wiki/Anarcho-capitalism

Anarcho-capitalism

Anarcho-capitalism (colloquially: ancap or '"an-cap"') is an anti-statist, libertarian political philosophy and economic theory that seeks to abolish centralized states in favor of stateless societies with systems of private property enforced by private agencies, the non-aggression principle, free markets and self-ownership, which extends the concept to include control of private property as part of the self. In the absence of statute, anarcho-capitalists hold that society tends to contractually self-regulate and civilize through participation in the free market, which they describe as a voluntary society involving the voluntary exchange of goods and services. In a theoretical anarcho-capitalist society, the system of private property would still exist and be enforced by private defense agencies and/or insurance companies selected by customers, which would operate competitively in a market and fulfill the roles of courts and the police. According to its proponents, various historical theorists have espoused philosophies similar to anarcho-capitalism. While the earliest extant attestation of "anarchocapitalism [sic]" is in Karl Hess's essay "The Death of Politics" published by Playboy in March 1969, the person credited with coining the terms anarcho-capitalism and anarcho-capitalist is Murray Rothbard. Rothbard, a leading figure in the 20th-century American libertarian movement, synthesized elements from the Austrian School, classical liberalism and 19th-century American individualist anarchists and mutualists Lysander Spooner and Benjamin Tucker, while rejecting the labor theory of value. Rothbard's anarcho-capitalist society would operate under a mutually agreed-upon "legal code which would be generally accepted, and which the courts would pledge themselves to follow". This legal code would recognize contracts between individuals, private property, self-ownership and tort law in keeping with the non-aggression principle. Rothbard views the power of the state as unjustified, arguing that it restricts individual rights and prosperity, and creates social and economic problems. Anarcho-capitalists and right-libertarians cite several historical precedents of what they believe to be examples of quasi-anarcho-capitalism, including the Republic of Cospaia, Acadia, Anglo-Saxon England, Medieval Iceland, the American Old West, Gaelic Ireland, and merchant law, admiralty law, and early common law. Anarcho-capitalism is distinguished from minarchism, which advocates a night-watchman state limited to protecting individuals from aggression and enforcing private property. Unlike most anarchists, anarcho-capitalists support private property and private institutions. Classification Anarcho-capitalism developed from radical American anti-state libertarianism and individualist anarchism. A strong current within anarchism does not consider anarcho-capitalism to be part of the anarchist movement because they argue that anarchism has historically been an anti-capitalist movement and for definitional reasons which see anarchism as incompatible with capitalist forms. According to several scholars, Anarcho-capitalism lies outside the tradition of the vast majority of anarchist schools of thought and is more closely affiliated with capitalism, right-libertarianism and neoliberalism. Social anarchists oppose and reject capitalism, and consider "anarcho-capitalism" to be a contradiction in terms, although some, including anarcho-capitalists and right-libertarians, consider anarcho-capitalism to be a form of anarchism. According to the Encyclopædia Britannica:Anarcho-capitalism is occasionally seen as part of the New Right. Philosophy Author J Michael Oliver says that during the 1960s, a philosophical movement arose in the United States that championed "reason, ethical egoism, and free-market capitalism". According to Oliver, anarcho-capitalism is a political theory which logically follows the philosophical conclusions of Objectivism, a philosophical system developed by Russian-American writer Ayn Rand, but Oliver acknowledges that his advocacy of anarcho-capitalism is "quite at odds with Rand's ardent defense of 'limited government. Professor Lisa Duggan also says that Rand's anti-statist, pro–"free market" stances went on to shape the politics of anarcho-capitalism. According to Patrik Schumacher, the political ideology and programme of Anarcho-capitalism envisages the radicalization of the neoliberal "rollback of the state", and calls for the extension of "entrepreneurial freedom" and "competitive market rationality" to the point where the scope for private enterprise is all-encompassing and "leaves no space for state action whatsoever". On the state Anarcho-capitalists oppose the state and seek to privatize any useful service the government presently provides, such as education, infrastructure, or the enforcement of law. They see capitalism and the "free market" as the basis for a free and prosperous society. Murray Rothbard stated that the difference between free-market capitalism and state capitalism is the difference between "peaceful, voluntary exchange" and a "collusive partnership" between business and government that "uses coercion to subvert the free market". Rothbard argued that all government services, including defense, are inefficient because they lack a market-based pricing mechanism regulated by "the voluntary decisions of consumers purchasing services that fulfill their highest-priority needs" and by investors seeking the most profitable enterprises to invest in. Maverick Edwards of the Liberty University describes anarcho-capitalism as a political, social, and economic theory that places markets as the central "governing body" and where government no longer "grants" rights to its citizenry. Non-aggression principle Writer Stanisław Wójtowicz says that although anarcho-capitalists are against centralized states, they hold that all people would naturally share and agree to a specific moral theory based on the non-aggression principle. While the Friedmanian formulation of anarcho-capitalism is robust to the presence of violence and in fact, assumes some degree of violence will occur, anarcho-capitalism as formulated by Rothbard and others holds strongly to the central libertarian nonaggression axiom, sometimes non-aggression principle. Rothbard wrote: Rothbard's defense of the self-ownership principle stems from what he believed to be his falsification of all other alternatives, namely that either a group of people can own another group of people, or that no single person has full ownership over one's self. Rothbard dismisses these two cases on the basis that they cannot result in a universal ethic, i.e. a just natural law that can govern all people, independent of place and time. The only alternative that remains to Rothbard is self-ownership which he believes is both axiomatic and universal. In general, the non-aggression axiom is described by Rothbard as a prohibition against the initiation of force, or the threat of force, against persons (in which he includes direct violence, assault and murder) or property (in which he includes fraud, burglary, theft and taxation). The initiation of force is usually referred to as aggression or coercion. The difference between anarcho-capitalists and other libertarians is largely one of the degree to which they take this axiom. Minarchist libertarians such as libertarian political parties would retain the state in some smaller and less invasive form, retaining at the very least public police, courts, and military. However, others might give further allowance for other government programs. In contrast, Rothbard rejects any level of "state intervention", defining the state as a coercive monopoly and as the only entity in human society, excluding acknowledged criminals, that derives its income entirely from coercion, in the form of taxation, which Rothbard describes as "compulsory seizure of the property of the State's inhabitants, or subjects." Some anarcho-capitalists such as Rothbard accept the non-aggression axiom on an intrinsic moral or natural law basis. It is in terms of the non-aggression principle that Rothbard defined his interpretation of anarchism, "a system which provides no legal sanction for such aggression ['against person and property']"; and wrote that "what anarchism proposes to do, then, is to abolish the State, i.e. to abolish the regularized institution of aggressive coercion". In an interview published in the American libertarian journal The New Banner, Rothbard stated that "capitalism is the fullest expression of anarchism, and anarchism is the fullest expression of capitalism". Property Private property Anarcho-capitalists postulate the privatization of everything, including cities with all their infrastructures, public spaces, streets and urban management systems. Central to Rothbardian anarcho-capitalism are the concepts of self-ownership and original appropriation that combines personal and private property. Hans-Hermann Hoppe wrote: Rothbard however rejected the Lockean proviso, and followed the rule of "first come, first served", without any consideration of how much resources are left for other individuals. Anarcho-capitalists advocate private ownership of the means of production and the allocation of the product of labor created by workers within the context of wage labour and the free market – that is through decisions made by property and capital owners, regardless of what an individual needs or does not need. Original appropriation allows an individual to claim any never-before-used resources, including land and by improving or otherwise using it, own it with the same "absolute right" as their own body, and retaining those rights forever, regardless of whether the resource is still being used by them. According to Rothbard, property can only come about through labor, therefore original appropriation of land is not legitimate by merely claiming it or building a fence around it—it is only by using land and by mixing one's labor with it that original appropriation is legitimized: "Any attempt to claim a new resource that someone does not use would have to be considered invasive of the property right of whoever the first user will turn out to be". Rothbard argued that the resource need not continue to be used in order for it to be the person's property as "for once his labor is mixed with the natural resource, it remains his owned land. His labor has been irretrievably mixed with the land, and the land is therefore his or his assigns' in perpetuity". Rothbard also spoke about a theory of justice in property rights: In Justice and Property Rights, Rothbard wrote that "any identifiable owner (the original victim of theft or his heir) must be accorded his property". In the case of slavery, Rothbard claimed that in many cases "the old plantations and the heirs and descendants of the former slaves can be identified, and the reparations can become highly specific indeed". Rothbard believed slaves rightfully own any land they were forced to work on under the homestead principle. If property is held by the state, Rothbard advocated its confiscation and "return to the private sector", writing that "any property in the hands of the State is in the hands of thieves, and should be liberated as quickly as possible". Rothbard proposed that state universities be seized by the students and faculty under the homestead principle. Rothbard also supported the expropriation of nominally "private property" if it is the result of state-initiated force such as businesses that receive grants and subsidies. Rothbard further proposed that businesses who receive at least 50% of their funding from the state be confiscated by the workers, writing: "What we libertarians object to, then, is not government per se but crime, what we object to is unjust or criminal property titles; what we are for is not 'private' property per se but just, innocent, non-criminal private property". Similarly, Karl Hess wrote that "libertarianism wants to advance principles of property but that it in no way wishes to defend, willy nilly, all property which now is called private ... Much of that property is stolen. Much is of dubious title. All of it is deeply intertwined with an immoral, coercive state system". By accepting an axiomatic definition of private property and property rights, anarcho-capitalists deny the legitimacy of a state on principle. Hans-Hermann Hoppe argues: Anarchists view capitalism as an inherently authoritarian and hierarchical system and seek the abolishment of private property. There is disagreement between anarchists and anarcho-capitalists as the former generally rejects anarcho-capitalism as a form of anarchism and considers anarcho-capitalism a contradiction in terms, while the latter holds that the abolishment of private property would require expropriation which is "counterproductive to order" and would require a state. Common property As opposed to anarchists, most anarcho-capitalists reject the commons. However, some of them propose that non-state public or community property can also exist in an anarcho-capitalist society. For anarcho-capitalists, what is important is that it is "acquired" and transferred without help or hindrance from what they call the "compulsory state". Deontological anarcho-capitalists believe that the only just and most economically beneficial way to acquire property is through voluntary trade, gift, or labor-based original appropriation, rather than through aggression or fraud. Anarcho-capitalists state that there could be cases where common property may develop in a Lockean natural rights framework. Anarcho-capitalists make the example of a number of private businesses which may arise in an area, each owning the land and buildings that they use, but they argue that the paths between them become cleared and trodden incrementally through customer and commercial movement. These thoroughfares may become valuable to the community, but according to them ownership cannot be attributed to any single person and original appropriation does not apply because many contributed the labor necessary to create them. In order to prevent it from falling to the "tragedy of the commons", anarcho-capitalists suggest transitioning from common to private property, wherein an individual would make a homesteading claim based on disuse, acquire title by the assent of the community consensus, form a corporation with other involved parties, or other means. Randall G. Holcombe see challenges stemming from the idea of common property under anarcho-capitalism, such as whether an individual might claim fishing rights in the area of a major shipping lane and thereby forbid passage through it. In contrast, Hoppe's work on anarcho-capitalist theory is based on the assumption that all property is privately held, "including all streets, rivers, airports, and harbors" which forms the foundation of his views on immigration. Intellectual property Some anarcho-capitalists strongly oppose intellectual property (i.e., trademarks, patents, copyrights). Stephan N. Kinsella argues that ownership only relates to tangible assets. Contractual society The society envisioned by anarcho-capitalists has been labelled by them as a "contractual society" which Rothbard described as "a society based purely on voluntary action, entirely unhampered by violence or threats of violence" The system relies on contracts between individuals as the legal framework which would be enforced by private police and security forces as well as private arbitrations. Rothbard argues that limited liability for corporations could also exist through contract, arguing that "[c]orporations are not at all monopolistic privileges; they are free associations of individuals pooling their capital. On the purely free market, those men would simply announce to their creditors that their liability is limited to the capital specifically invested in the corporation". There are limits to the right to contract under some interpretations of anarcho-capitalism. Rothbard believes that the right to contract is based in inalienable rights and because of this any contract that implicitly violates those rights can be voided at will, preventing a person from permanently selling himself or herself into unindentured slavery. That restriction aside, the right to contract under anarcho-capitalist order would be pretty broad. For example, Rothbard went as far as to justify stork markets, arguing that a market in guardianship rights would facilitate the transfer of guardianship from abusive or neglectful parents to those more interested or suited to raising children. Other anarcho-capitalists have also suggested the legalization of organ markets, as in Iran's renal market. Other interpretations conclude that banning such contracts would in itself be an unacceptably invasive interference in the right to contract. Included in the right of contract is "the right to contract oneself out for employment by others". While anarchists criticize wage labour describing it as wage slavery, anarcho-capitalists view it as a consensual contract. Some anarcho-capitalists prefer to see self-employment prevail over wage labor. David D. Friedman has expressed a preference for a society where "almost everyone is self-employed" and "instead of corporations there are large groups of entrepreneurs related by trade, not authority. Each sells not his time, but what his time produces". Law and order and the use of violence Different anarcho-capitalists propose different forms of anarcho-capitalism and one area of disagreement is in the area of law. In The Market for Liberty, Morris and Linda Tannehill object to any statutory law whatsoever. They argue that all one has to do is ask if one is aggressing against another in order to decide if an act is right or wrong. However, while also supporting a on force and fraud, Rothbard supports the establishment of a mutually agreed-upon centralized libertarian legal code which private courts would pledge to follow, as he presumes a high degree of convergence amongst individuals about what constitutes natural justice. Unlike both the Tannehills and Rothbard who see an ideological commonality of ethics and morality as a requirement, David D. Friedman proposes that "the systems of law will be produced for profit on the open market, just as books and bras are produced today. There could be competition among different brands of law, just as there is competition among different brands of cars". Friedman says whether this would lead to a libertarian society "remains to be proven". He says it is a possibility that very un-libertarian laws may result, such as laws against drugs, but he thinks this would be rare. He reasons that "if the value of a law to its supporters is less than its cost to its victims, that law ... will not survive in an anarcho-capitalist society". Anarcho-capitalists only accept the collective defense of individual liberty (i.e. courts, military, or police forces) insofar as such groups are formed and paid for on an explicitly voluntary basis. However, their complaint is not just that the state's defensive services are funded by taxation, but that the state assumes it is the only legitimate practitioner of physical force—that is, they believe it forcibly prevents the private sector from providing comprehensive security, such as a police, judicial and prison systems to protect individuals from aggressors. Anarcho-capitalists believe that there is nothing morally superior about the state which would grant it, but not private individuals, a right to use physical force to restrain aggressors. If competition in security provision were allowed to exist, prices would also be lower and services would be better according to anarcho-capitalists. According to Molinari: "Under a regime of liberty, the natural organization of the security industry would not be different from that of other industries". Proponents believe that private systems of justice and defense already exist, naturally forming where the market is allowed to "compensate for the failure of the state", namely private arbitration, security guards, neighborhood watch groups and so on. These private courts and police are sometimes referred to generically as private defense agencies (PDAs). The defense of those unable to pay for such protection might be financed by charitable organizations relying on voluntary donation rather than by state institutions relying on taxation, or by cooperative self-help by groups of individuals. Edward Stringham argues that private adjudication of disputes could enable the market to internalize externalities and provide services that customers desire. Rothbard stated that the American Revolutionary War and the War of Southern Secession were the only two just wars in American military history. Some anarcho-capitalists such as Rothbard feel that violent revolution is counter-productive and prefer voluntary forms of economic secession to the extent possible. Retributive justice is often a component of the contracts imagined for an anarcho-capitalist society. According to Matthew O'Keefee, some anarcho-capitalists believe prisons or indentured servitude would be justifiable institutions to deal with those who violate anarcho-capitalist property relations while others believe exile or forced restitution are sufficient. Rothbard stressed the importance of restitution as the primary focus of a libertarian legal order and advocated for corporal punishment for petty vandals and the death penalty for murders. Bruce L. Benson argues that legal codes may impose punitive damages for intentional torts in the interest of deterring crime. Benson gives the example of a thief who breaks into a house by picking a lock. Even if caught before taking anything, Benson argues that the thief would still owe the victim for violating the sanctity of his property rights. Benson opines that despite the lack of objectively measurable losses in such cases, "standardized rules that are generally perceived to be fair by members of the community would, in all likelihood, be established through precedent, allowing judgments to specify payments that are reasonably appropriate for most criminal offenses". Morris and Linda Tannehill raise a similar example, saying that a bank robber who had an attack of conscience and returned the money would still owe reparations for endangering the employees' and customers' lives and safety, in addition to the costs of the defense agency answering the teller's call for help. However, they believe that the robber's loss of reputation would be even more damaging. They suggest that specialized companies would list aggressors so that anyone wishing to do business with a man could first check his record, provided they trust the veracity of the companies' records. They further theorise that the bank robber would find insurance companies listing him as a very poor risk and other firms would be reluctant to enter into contracts with him. Influences Murray Rothbard has listed different ideologies of which his interpretations, he said, have influenced anarcho-capitalism. This includes his interpretation of anarchism, and more precisely individualist anarchism; classical liberalism and the Austrian School of economic thought. Scholars additionally associate anarcho-capitalism with neo-classical liberalism, radical neoliberalism and right-libertarianism. Anarchism In both its social and individualist forms, anarchism is usually considered an anti-capitalist and radical left-wing or far-left movement that promotes libertarian socialist economic theories such as collectivism, communism, individualism, mutualism and syndicalism. Because anarchism is usually described alongside libertarian Marxism as the libertarian wing of the socialist movement and as having a historical association with anti-capitalism and socialism, anarchists believe that capitalism is incompatible with social and economic equality and therefore do not recognize anarcho-capitalism as an anarchist school of thought. In particular, anarchists argue that capitalist transactions are not voluntary and that maintaining the class structure of a capitalist society requires coercion which is incompatible with an anarchist society. The usage of libertarian is also in dispute. While both anarchists and anarcho-capitalists have used it, libertarian was synonymous with anarchist until the mid-20th century, when anarcho-capitalist theory developed. Anarcho-capitalists are distinguished from the dominant anarchist tradition by their relation to property and capital. While both anarchism and anarcho-capitalism share general antipathy towards government authority, anarcho-capitalism favors free-market capitalism. Anarchists, including egoists such as Max Stirner, have supported the protection of an individual's freedom from powers of both government and private property owners. In contrast, while condemning governmental encroachment on personal liberties, anarcho-capitalists support freedoms based on private property rights. Anarcho-capitalist theorist Murray Rothbard argued that protesters should rent a street for protest from its owners. The abolition of public amenities is a common theme in some anarcho-capitalist writings. As anarcho-capitalism puts laissez-faire economics before economic equality, it is commonly viewed as incompatible with the anti-capitalist and egalitarian tradition of anarchism. Although anarcho-capitalist theory implies the abolition of the state in favour of a fully laissez-faire economy, it lies outside the tradition of anarchism. While using the language of anarchism, anarcho-capitalism only shares anarchism's antipathy towards the state and not anarchism's antipathy towards hierarchy as theorists expect from anarcho-capitalist economic power relations. It follows a different paradigm from anarchism and has a fundamentally different approach and goals. In spite of the anarcho- in its title, anarcho-capitalism is more closely affiliated with capitalism, right-libertarianism, and liberalism than with anarchism. Some within this laissez-faire tradition reject the designation of anarcho-capitalism, believing that capitalism may either refer to the laissez-faire market they support or the government-regulated system that they oppose. Rothbard argued that anarcho-capitalism is the only true form of anarchism—the only form of anarchism that could possibly exist in reality as he maintained that any other form presupposes authoritarian enforcement of a political ideology such as "redistribution of private property", which he attributed to anarchism. According to this argument, the capitalist free market is "the natural situation" that would result from people being free from state authority and entails the establishment of all voluntary associations in society such as cooperatives, non-profit organizations, businesses and so on. Moreover, anarcho-capitalists, as well as classical liberal minarchists, argue that the application of anarchist ideals as advocated by what they term "left-wing anarchists" would require an authoritarian body of some sort to impose it. Based on their understanding and interpretation of anarchism, in order to forcefully prevent people from accumulating capital, which they believe is a goal of anarchists, there would necessarily be a redistributive organization of some sort which would have the authority to in essence exact a tax and re-allocate the resulting resources to a larger group of people. They conclude that this theoretical body would inherently have political power and would be nothing short of a state. The difference between such an arrangement and an anarcho-capitalist system is what anarcho-capitalists see as the voluntary nature of organization within anarcho-capitalism contrasted with a "centralized ideology" and a "paired enforcement mechanism" which they believe would be necessary under what they describe as a "coercively" egalitarian-anarchist system. Rothbard also argued that the capitalist system of today is not properly anarchistic because it often colludes with the state. According to Rothbard, "what Marx and later writers have done is to lump together two extremely different and even contradictory concepts and actions under the same portmanteau term. These two contradictory concepts are what I would call 'free-market capitalism' on the one hand, and 'state capitalism' on the other". "The difference between free-market capitalism and state capitalism", writes Rothbard, "is precisely the difference between, on the one hand, peaceful, voluntary exchange, and on the other, violent expropriation". He continues: "State capitalism inevitably creates all sorts of problems which become insoluble". Traditional anarchists reject the notion of capitalism, hierarchies and private property. Albert Meltzer argued that anarcho-capitalism simply cannot be anarchism because capitalism and the state are inextricably interlinked and because capitalism exhibits domineering hierarchical structures such as that between an employer and an employee. Anna Morgenstern approaches this topic from the opposite perspective, arguing that anarcho-capitalists are not really capitalists because "mass concentration of capital is impossible" without the state. According to Jeremy Jennings, "[i]t is hard not to conclude that these ideas," referring to anarcho-capitalism, have "roots deep in classical liberalism" and "are described as anarchist only on the basis of a misunderstanding of what anarchism is." For Jennings, "anarchism does not stand for the untrammelled freedom of the individual (as the 'anarcho-capitalists' appear to believe) but, as we have already seen, for the extension of individuality and community." Similarly, Barbara Goodwin, Emeritus Professor of Politics at the University of East Anglia, Norwich, argues that anarcho-capitalism's "true place is in the group of right-wing libertarians", not in anarchism. Some right-libertarian scholars like Michael Huemer, who identify with the ideology, describe anarcho-capitalism as a "variety of anarchism". British author Andrew Heywood also believes that "individualist anarchism overlaps with libertarianism and is usually linked to a strong belief in the market as a self-regulating mechanism, most obviously manifest in the form of anarcho-capitalism". Frank H. Brooks, author of The Individualist Anarchists: An Anthology of Liberty (1881–1908), believes that "anarchism has always included a significant strain of radical individualism, from the hyperrationalism of Godwin, to the egoism of Stirner, to the libertarians and anarcho-capitalists of today". While both anarchism and anarcho-capitalism are in opposition to the state, it is a necessary but not sufficient condition because anarchists and anarcho-capitalists interpret state-rejection differently. Austrian school economist David Prychitko, in the context of anarcho-capitalism says that "while society without a state is necessary for full-fledged anarchy, it is nevertheless insufficient". According to Ruth Kinna, anarcho-capitalists are anti-statists who draw more on right-wing liberal theory and the Austrian School than anarchist traditions. Kinna writes that "[i]n order to highlight the clear distinction between the two positions", anarchists describe anarcho-capitalists as "propertarians". Anarcho-capitalism is usually seen as part of the New Right. Some anarcho-capitalists argue that, according to them, anarchists consider the word "anarchy" as to be the antithesis of hierarchy, and therefore, that "anarcho-capitalism" is sometimes considered to be a term with differences philosophically to what they personally consider to be true anarchism, as an anarcho-capitalist society would inherently contain hierarchy. Additionally, Rothbard discusses the difference between "government" and "governance" thus, proponents of anarcho-capitalism think the philosophy's common name is indeed consistent, as it promotes private governance, but is vehemently anti-government. Classical liberalism Historian and libertarian Ralph Raico argued that what liberal philosophers "had come up with was a form of individualist anarchism, or, as it would be called today, anarcho-capitalism or market anarchism". He also said that Gustave de Molinari was proposing a doctrine of the private production of security, a position which was later taken up by Murray Rothbard. Some anarcho-capitalists consider Molinari to be the first proponent of anarcho-capitalism. In the preface to the 1977 English translation by Murray Rothbard called The Production of Security the "first presentation anywhere in human history of what is now called anarcho-capitalism", although admitting that "Molinari did not use the terminology, and probably would have balked at the name". Hans-Hermann Hoppe said that "the 1849 article 'The Production of Security' is probably the single most important contribution to the modern theory of anarcho-capitalism". According to Hans-Hermann Hoppe, one of the 19th century precursors of anarcho-capitalism were philosopher Herbert Spencer, classical liberal Auberon Herbert and liberal socialist Franz Oppenheimer. Ruth Kinna credits Murray Rothbard with coining the term anarcho-capitalism, which is – Kinna proposes – to describe "a commitment to unregulated private property and laissez-faire economics, prioritizing the liberty-rights of individuals, unfettered by government regulation, to accumulate, consume and determine the patterns of their lives as they see fit". According to Kinna, anarcho-capitalists "will sometimes label themselves market anarchists because they recognize the negative connotations of 'capitalism'. But the literature of anarcho-capitalism draws on classical liberal theory, particularly the Austrian School – Friedrich von Hayek and Ludwig von Mises – rather than recognizable anarchist traditions. Ayn Rand's laissez-faire, anti-government, corporate philosophy – Objectivism – is sometimes associated with anarcho-capitalism". Other scholars similarly associate anarcho-capitalism with anti-state classical liberalism, neo-classical liberalism, radical neoliberalism and right-libertarianism. Paul Dragos Aligica writes that there is a "foundational difference between the classical liberal and the anarcho-capitalist positions". Classical liberalism, while accepting critical arguments against collectivism, acknowledges a certain level of public ownership and collective governance as necessary to provide practical solutions to political problems. In contrast anarcho-capitalism, according to Aligica, denies any requirement for any form of public administration, and allows no meaningful role for the public sphere, which is seen as sub-optimal and illegitimate. Individualist anarchism Murray Rothbard, a student of Ludwig von Mises, stated that he was influenced by the work of the 19th-century American individualist anarchists. In the winter of 1949, Rothbard decided to reject minimal state laissez-faire and embrace his interpretation of individualist anarchism. In 1965, Rothbard wrote that "Lysander Spooner and Benjamin R. Tucker were unsurpassed as political philosophers and nothing is more needed today than a revival and development of the largely forgotten legacy they left to political philosophy". However, Rothbard thought that they had a faulty understanding of economics as the 19th-century individualist anarchists had a labor theory of value as influenced by the classical economists, while Rothbard was a student of Austrian School economics which does not agree with the labor theory of value. Rothbard sought to meld 19th-century American individualist anarchists' advocacy of economic individualism and free markets with the principles of Austrian School economics, arguing that "[t]here is, in the body of thought known as 'Austrian economics', a scientific explanation of the workings of the free market (and of the consequences of government intervention in that market) which individualist anarchists could easily incorporate into their political and social Weltanschauung". Rothbard held that the economic consequences of the political system they advocate would not result in an economy with people being paid in proportion to labor amounts, nor would profit and interest disappear as they expected. Tucker thought that unregulated banking and money issuance would cause increases in the money supply so that interest rates would drop to zero or near to it. Peter Marshall states that "anarcho-capitalism overlooks the egalitarian implications of traditional individualist anarchists like Spooner and Tucker". Stephanie Silberstein states that "While Spooner was no free-market capitalist, nor an anarcho-capitalist, he was not as opposed to capitalism as most socialists were." In "The Spooner-Tucker Doctrine: An Economist's View", Rothbard explained his disagreements. Rothbard disagreed with Tucker that it would cause the money supply to increase because he believed that the money supply in a free market would be self-regulating. If it were not, then Rothbard argued inflation would occur so it is not necessarily desirable to increase the money supply in the first place. Rothbard claimed that Tucker was wrong to think that interest would disappear regardless because he believed people, in general, do not wish to lend their money to others without compensation, so there is no reason why this would change just because banking was unregulated. Tucker held a labor theory of value and thought that in a free market people would be paid in proportion to how much labor they exerted and that exploitation or usury was taking place if they were not. As Tucker explained in State Socialism and Anarchism, his theory was that unregulated banking would cause more money to be available and that this would allow the proliferation of new businesses which would, in turn, raise demand for labor. This led Tucker to believe that the labor theory of value would be vindicated and equal amounts of labor would receive equal pay. As an Austrian School economist, Rothbard did not agree with the labor theory and believed that prices of goods and services are proportional to marginal utility rather than to labor amounts in the free market. As opposed to Tucker he did not think that there was anything exploitative about people receiving an income according to how much "buyers of their services value their labor" or what that labor produces. Without the labor theory of value, some argue that 19th-century individualist anarchists approximate the modern movement of anarcho-capitalism, although this has been contested or rejected. As economic theory changed, the popularity of the labor theory of classical economics was superseded by the subjective theory of value of neoclassical economics and Rothbard combined Mises' Austrian School of economics with the absolutist views of human rights and rejection of the state he had absorbed from studying the individualist American anarchists of the 19th century such as Tucker and Spooner. In the mid-1950s, Rothbard wrote an unpublished article named "Are Libertarians 'Anarchists'?" under the pseudonym "Aubrey Herbert", concerned with differentiating himself from communist and socialistic economic views of anarchists, including the individualist anarchists of the 19th century, concluding that "we are not anarchists and that those who call us anarchists are not on firm etymological ground and are being completely unhistorical. On the other hand, it is clear that we are not archists either: we do not believe in establishing a tyrannical central authority that will coerce the noninvasive as well as the invasive. Perhaps, then, we could call ourselves by a new name: nonarchist." Joe Peacott, an American individualist anarchist in the mutualist tradition, criticizes anarcho-capitalists for trying to hegemonize the individualist anarchism label and make appear as if all individualist anarchists are in favor of capitalism. Peacott states that "individualists, both past and present, agree with the communist anarchists that present-day capitalism is based on economic coercion, not on voluntary contract. Rent and interest are the mainstays of modern capitalism and are protected and enforced by the state. Without these two unjust institutions, capitalism could not exist". Anarchist activists and scholars do not consider anarcho-capitalism as a part of the anarchist movement, arguing that anarchism has historically been an anti-capitalist movement and see it as incompatible with capitalist forms. Although some regard anarcho-capitalism as a form of individualist anarchism, many others disagree or contest the existence of an individualist–socialist divide. In coming to terms that anarchists mostly identified with socialism, Rothbard wrote that individualist anarchism is different from anarcho-capitalism and other capitalist theories due to the individualist anarchists retaining the labor theory of value and socialist doctrines. Similarly, many writers deny that anarcho-capitalism is a form of anarchism or that capitalism is compatible with anarchism. The Palgrave Handbook of Anarchism writes that "[a]s Benjamin Franks rightly points out, individualisms that defend or reinforce hierarchical forms such as the economic-power relations of anarcho-capitalism are incompatible with practices of social anarchism based on developing immanent goods which contest such as inequalities". Laurence Davis cautiously asks "[I]s anarcho-capitalism really a form of anarchism or instead a wholly different ideological paradigm whose adherents have attempted to expropriate the language of anarchism for their own anti-anarchist ends?" Davis cites Iain McKay, "whom Franks cites as an authority to support his contention that 'academic analysis has followed activist currents in rejecting the view that anarcho-capitalism has anything to do with social anarchism, as arguing "quite emphatically on the very pages cited by Franks that anarcho-capitalism is by no means a type of anarchism". McKay writes that "[i]t is important to stress that anarchist opposition to the so-called capitalist 'anarchists' does not reflect some kind of debate within anarchism, as many of these types like to pretend, but a debate between anarchism and its old enemy capitalism. ... Equally, given that anarchists and 'anarcho'-capitalists have fundamentally different analyses and goals it is hardly 'sectarian' to point this out". Davis writes that "Franks asserts without supporting evidence that most major forms of individualist anarchism have been largely anarcho-capitalist in content, and concludes from this premise that most forms of individualism are incompatible with anarchism". Davis argues that "the conclusion is unsustainable because the premise is false, depending as it does for any validity it might have on the further assumption that anarcho-capitalism is indeed a form of anarchism. If we reject this view, then we must also reject the individual anarchist versus the communal anarchist 'chasm' style of argument that follows from it". Davis maintains that "the ideological core of anarchism is the belief that society can and should be organised without hierarchy and domination. Historically, anarchists have struggles against a wide range of regimes of domination, from capitalism, the state system, patriarchy, heterosexism, and the domination of nature to colonialism, the war system, slavery, fascism, white supremacy, and certain forms of organised religion". According to Davis, "[w]hile these visions range from the predominantly individualistic to the predominantly communitarian, features common to virtually all include an emphasis on self-management and self-regulatory methods of organisation, voluntary association, decentralised society, based on the principle of free association, in which people will manage and govern themselves". Finally, Davis includes a footnote stating that "[i]ndividualist anarchism may plausibly be re regarded as a form of both socialism and anarchism. Whether the individualist anarchists were consistent anarchists (and socialists) is another question entirely. ... McKay comments as follows: 'any individualist anarchism which supports wage labour is inconsistent anarchism. It can easily be made consistent anarchism by applying its own principles consistently. In contrast 'anarcho'-capitalism rejects so many of the basic, underlying, principles of anarchism ... that it cannot be made consistent with the ideals of anarchism. Historical precedents Several anarcho-capitalists and right-libertarians have discussed historical precedents of what they believe were examples of anarcho-capitalism. Free cities of medieval Europe Economist and libertarian scholar Bryan Caplan considers the free cities of medieval Europe as examples of "anarchist" or "nearly anarchistic" societies, further arguing: Medieval Iceland According to the libertarian theorist David D. Friedman, "[m]edieval Icelandic institutions have several peculiar and interesting characteristics; they might almost have been invented by a mad economist to test the lengths to which market systems could supplant government in its most fundamental functions". While not directly labeling it anarcho-capitalist, Friedman argues that the legal system of the Icelandic Commonwealth comes close to being a real-world anarcho-capitalist legal system. Although noting that there was a single legal system, Friedman argues that enforcement of the law was entirely private and highly capitalist, providing some evidence of how such a society would function. Friedman further wrote that "[e]ven where the Icelandic legal system recognized an essentially 'public' offense, it dealt with it by giving some individual (in some cases chosen by lot from those affected) the right to pursue the case and collect the resulting fine, thus fitting it into an essentially private system". Friedman and Bruce L. Benson argued that the Icelandic Commonwealth saw significant economic and social progress in the absence of systems of criminal law, an executive, or bureaucracy. This commonwealth was led by chieftains, whose position could be bought and sold like that of private property. Being a member of the chieftainship was also completely voluntary. American Old West According to Terry L. Anderson and P. J. Hill, the Old West in the United States in the period of 1830 to 1900 was similar to anarcho-capitalism in that "private agencies provided the necessary basis for an orderly society in which property was protected and conflicts were resolved" and that the common popular perception that the Old West was chaotic with little respect for property rights is incorrect. Since squatters had no claim to western lands under federal law, extra-legal organizations formed to fill the void. Benson explains: According to Anderson, "[d]efining anarcho-capitalist to mean minimal government with property rights developed from the bottom up, the western frontier was anarcho-capitalistic. People on the frontier invented institutions that fit the resource constraints they faced". Gaelic Ireland In his work For a New Liberty, Murray Rothbard has claimed ancient Gaelic Ireland as an example of nearly anarcho-capitalist society. In his depiction, citing the work of Professor Joseph Peden, the basic political unit of ancient Ireland was the tuath, which is portrayed as "a body of persons voluntarily united for socially beneficial purposes" with its territorial claim being limited to "the sum total of the landed properties of its members". Civil disputes were settled by private arbiters called "brehons" and the compensation to be paid to the wronged party was insured through voluntary surety relationships. Commenting on the "kings" of tuaths, Rothbard stated: Law merchant, admiralty law, and early common law Some libertarians have cited law merchant, admiralty law and early common law as examples of anarcho-capitalism. In his work Power and Market, Rothbard stated: Somalia from 1991 to 2006 Economist Alex Tabarrok argued that Somalia in its stateless period provided a "unique test of the theory of anarchy", in some aspects near of that espoused by anarcho-capitalists David D. Friedman and Murray Rothbard. Nonetheless, both anarchists and some anarcho-capitalists argue that Somalia was not an anarchist society. Analysis and criticism State, justice and defense Anarchists such as Brian Morris argue that anarcho-capitalism does not in fact get rid of the state. He says that anarcho-capitalists "simply replaced the state with private security firms, and can hardly be described as anarchists as the term is normally understood". In "Libertarianism: Bogus Anarchy", anarchist Peter Sabatini notes: Similarly, Bob Black argues that an anarcho-capitalist wants to "abolish the state to his own satisfaction by calling it something else". He states that they do not denounce what the state does, they just "object to who's doing it". Paul Birch argues that legal disputes involving several jurisdictions and different legal systems will be too complex and costly. He therefore argues that anarcho-capitalism is inherently unstable, and would evolve, entirely through the operation of free market forces, into either a single dominant private court with a natural monopoly of justice over the territory (a de facto state), a society of multiple city states, each with a territorial monopoly, or a 'pure anarchy' that would rapidly descend into chaos. Randall G. Holcombe argues that anarcho-capitalism turns justice into a commodity as private defense and court firms would favour those who pay more for their services. He argues that defense agencies could form cartels and oppress people without fear of competition. Philosopher Albert Meltzer argued that since anarcho-capitalism promotes the idea of private armies, it actually supports a "limited State". He contends that it "is only possible to conceive of Anarchism which is free, communistic and offering no economic necessity for repression of countering it". Libertarian Robert Nozick argues that a competitive legal system would evolve toward a monopoly government—even without violating individuals' rights in the process. In Anarchy, State, and Utopia, Nozick defends minarchism and argues that an anarcho-capitalist society would inevitably transform into a minarchist state through the eventual emergence of a monopolistic private defense and judicial agency that no longer faces competition. He argues that anarcho-capitalism results in an unstable system that would not endure in the real world. While anarcho-capitalists such as Roy Childs and Murray Rothbard have rejected Nozick's arguments, with Rothbard arguing that the process described by Nozick, with the dominant protection agency outlawing its competitors, in fact violates its own clients' rights, John Jefferson actually advocates Nozick's argument and states that such events would best operate in laissez-faire. Robert Ellickson presented a Hayekian case against anarcho-capitalism, calling it a "pipe-dream" and stating that anarcho-capitalists "by imagining a stable system of competing private associations, ignore both the inevitability of territorial monopolists in governance, and the importance of institutions to constrain those monopolists' abuses". Some libertarians argue that anarcho-capitalism would result in different standards of justice and law due to relying too much on the market. Friedman responded to this criticism by arguing that it assumes the state is controlled by a majority group that has similar legal ideals. If the populace is diverse, different legal standards would therefore be appropriate. Rights and freedom Negative and positive rights are rights that oblige either action (positive rights) or inaction (negative rights). Anarcho-capitalists believe that negative rights should be recognized as legitimate, but positive rights should be rejected as an intrusion. Some critics reject the distinction between positive and negative rights. Peter Marshall also states that the anarcho-capitalist definition of freedom is entirely negative and that it cannot guarantee the positive freedom of individual autonomy and independence. About anarcho-capitalism, anarcho-syndicalist and anti-capitalist intellectual Noam Chomsky says: Economics and property Social anarchists argue that anarcho-capitalism allows individuals to accumulate significant power through free markets and private property. Friedman responded by arguing that the Icelandic Commonwealth was able to prevent the wealthy from abusing the poor by requiring individuals who engaged in acts of violence to compensate their victims financially. Anarchists argue that certain capitalist transactions are not voluntary and that maintaining the class structure of a capitalist society requires coercion which violates anarchist principles. Anthropologist David Graeber noted his skepticism about anarcho-capitalism along the same lines, arguing: Some critics argue that the anarcho-capitalist concept of voluntary choice ignores constraints due to both human and non-human factors such as the need for food and shelter as well as active restriction of both used and unused resources by those enforcing property claims. If a person requires employment in order to feed and house himself, the employer-employee relationship could be considered involuntary. Another criticism is that employment is involuntary because the economic system that makes it necessary for some individuals to serve others is supported by the enforcement of coercive private property relations. Some philosophies view any ownership claims on land and natural resources as immoral and illegitimate. Objectivist philosopher Harry Binswanger criticizes anarcho-capitalism by arguing that "capitalism requires government", questioning who or what would enforce treaties and contracts. Some right-libertarian critics of anarcho-capitalism who support the full privatization of capital such as geolibertarians argue that land and the raw materials of nature remain a distinct factor of production and cannot be justly converted to private property because they are not products of human labor. Some socialists, including market anarchists and mutualists, adamantly oppose absentee ownership. Anarcho-capitalists have strong abandonment criteria, namely that one maintains ownership until one agrees to trade or gift it. Anti-state critics of this view posit comparatively weak abandonment criteria, arguing that one loses ownership when one stops personally occupying and using it as well as the idea of perpetually binding original appropriation is anathema to traditional schools of anarchism. Literature The following is a partial list of notable nonfiction works discussing anarcho-capitalism. Bruce L. Benson, The Enterprise of Law: Justice Without The State To Serve and Protect: Privatization and Community in Criminal Justice David D. Friedman, The Machinery of Freedom Edward P. Stringham, Anarchy and the Law: The Political Economy of Choice George H. Smith, "Justice Entrepreneurship in a Free Market" Gerard Casey, Libertarian Anarchy: Against the State Hans-Hermann Hoppe, Anarcho-Capitalism: An Annotated Bibliography A Theory of Socialism and Capitalism Democracy: The God That Failed The Economics and Ethics of Private Property Linda and Morris Tannehill, The Market for Liberty Michael Huemer, The Problem of Political Authority Murray Rothbard, founder of anarcho-capitalism: For a New Liberty Man, Economy, and State Power and Market The Ethics of Liberty See also Agorism Anarcho-capitalism and minarchism Consequentialist libertarianism Counter-economics Creative disruption Crypto-anarchism Definition of anarchism and libertarianism Issues in anarchism Left-wing market anarchism Natural-rights libertarianism Privatization in criminal justice Propertarianism Stateless society The Libertarian Forum Voluntaryism Notes References Further reading Brown, Susan Love (1997). "The Free Market as Salvation from Government: The Anarcho-Capitalist View". In Carrier, James G., ed. Meanings of the Market: The Free Market in Western Culture (illustrated ed.). Oxford: Berg Publishers. p. 99. . External links Anarcho-capitalist FAQ LewRockwell.com – website run by Lew Rockwell Mises Institute – research and educational center of classical liberalism, including anarcho-capitalism, Austrian School of economics and American libertarian political theory Property and Freedom Society – international anarcho-capitalist society Strike The Root – an anarcho-capitalist website featuring essays, news, and a forum Austrian School Capitalist systems Economic ideologies Anarcho-capitalism Ideologies of capitalism Classical liberalism Libertarianism by form Political ideologies Right-libertarianism Syncretic political movements Murray Rothbard

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https://en.wikipedia.org/wiki/Austrian%20school%20of%20economics

Austrian school of economics

The Austrian School is a heterodox school of economic thought that advocates strict adherence to methodological individualism, the concept that social phenomena result exclusively from the motivations and actions of individuals. Austrian school theorists hold that economic theory should be exclusively derived from basic principles of human action. The Austrian School originated in Vienna with the work of Carl Menger, Eugen von Böhm-Bawerk, Friedrich von Wieser, and others. It was methodologically opposed to the Historical School (based in Germany), in a dispute known as Methodenstreit, or methodology struggle. Current-day economists working in this tradition are located in many different countries, but their work is still referred to as Austrian economics. Among the theoretical contributions of the early years of the Austrian School are the subjective theory of value, marginalism in price theory and the formulation of the economic calculation problem, each of which has become an accepted part of mainstream economics. In the 1970s, the Austrian School attracted some renewed interest after Friedrich Hayek shared the 1974 Nobel Memorial Prize in Economic Sciences with Gunnar Myrdal. History Etymology The Austrian School owes its name to members of the German historical school of economics, who argued against the Austrians during the late 19th-century Methodenstreit ("methodology struggle"), in which the Austrians defended the role of theory in economics as distinct from the study or compilation of historical circumstance. In 1883, Menger published Investigations into the Method of the Social Sciences with Special Reference to Economics, which attacked the methods of the historical school. Gustav von Schmoller, a leader of the historical school, responded with an unfavorable review, coining the term "Austrian School" in an attempt to characterize the school as outcast and provincial. The label endured and was adopted by the adherents themselves. First wave The school originated in Vienna in the Austrian Empire. Carl Menger's 1871 book Principles of Economics is generally considered the founding of the Austrian School. The book was one of the first modern treatises to advance the theory of marginal utility. The Austrian School was one of three founding currents of the marginalist revolution of the 1870s, with its major contribution being the introduction of the subjectivist approach in economics. Despite such claim, John Stuart Mill had used value in use in this sense in 1848 in Principles of Political Economy, where he wrote: "Value in use, or as Mr. De Quincey calls it, teleologic value, is the extreme limit of value in exchange. The exchange value of a thing may fall short, to any amount, of its value in use; but that it can ever exceed the value in use, implies a contradiction; it supposes that persons will give, to possess a thing, more than the utmost value which they themselves put upon it as a means of gratifying their inclinations." While marginalism was generally influential, there was also a more specific school that began to coalesce around Menger's work, which came to be known as the "Psychological School", "Vienna School", or "Austrian School". Menger's contributions to economic theory were closely followed by those of Eugen Böhm von Bawerk and Friedrich von Wieser. These three economists became what is known as the "first wave" of the Austrian School. Böhm-Bawerk wrote extensive critiques of Karl Marx in the 1880s and 1890s and was part of the Austrians' participation in the late 19th-century Methodenstreit, during which they attacked the Hegelian doctrines of the historical school. Early 20th century Frank Albert Fetter (1863–1949) was a leader in the United States of Austrian thought. He obtained his PhD in 1894 from the University of Halle and then was made Professor of Political Economy and Finance at Cornell University in 1901. Several important Austrian economists trained at the University of Vienna in the 1920s and later participated in private seminars held by Ludwig von Mises. These included Gottfried Haberler, Friedrich Hayek, Fritz Machlup, Karl Menger (son of Carl Menger), Oskar Morgenstern, Paul Rosenstein-Rodan, Abraham Wald, and Michael A. Heilperin, among others, as well as the sociologist Alfred Schütz. Later 20th century By the mid-1930s, most economists had embraced what they considered the important contributions of the early Austrians. Fritz Machlup quoted Hayek's statement that "the greatest success of a school is that it stops existing because its fundamental teachings have become parts of the general body of commonly accepted thought". Sometime during the middle of the 20th century, Austrian economics became disregarded or derided by mainstream economists because it rejected model building and mathematical and statistical methods in the study of economics. Mises' student Israel Kirzner recalled that in 1954, when Kirzner was pursuing his PhD, there was no separate Austrian School as such. When Kirzner was deciding which graduate school to attend, Mises had advised him to accept an offer of admission at Johns Hopkins because it was a prestigious university and Fritz Machlup taught there. After the 1940s, Austrian economics can be divided into two schools of economic thought and the school "split" to some degree in the late 20th century. One camp of Austrians, exemplified by Mises, regards neoclassical methodology to be irredeemably flawed; the other camp, exemplified by Friedrich Hayek, accepts a large part of neoclassical methodology and is more accepting of government intervention in the economy. Henry Hazlitt wrote economics columns and editorials for a number of publications and wrote many books on the topic of Austrian economics from the 1930s to the 1980s. Hazlitt's thinking was influenced by Mises. His book Economics in One Lesson (1946) sold over a million copies and he is also known for The Failure of the "New Economics" (1959), a line-by-line critique of John Maynard Keynes's General Theory. The reputation of the Austrian School rose in the late 20th century due in part to the work of Israel Kirzner and Ludwig Lachmann at New York University and to renewed public awareness of the work of Hayek after he won the 1974 Nobel Memorial Prize in Economic Sciences. Hayek's work was influential in the revival of laissez-faire thought in the 20th century. Split among contemporary Austrians Economist Leland Yeager discussed the late 20th-century rift and referred to a discussion written by Murray Rothbard, Hans-Hermann Hoppe, Joseph Salerno and others in which they attack and disparage Hayek. Yeager stated: "To try to drive a wedge between Mises and Hayek on [the role of knowledge in economic calculation], especially to the disparagement of Hayek, is unfair to these two great men, unfaithful to the history of economic thought". He went on to call the rift subversive to economic analysis and the historical understanding of the fall of Eastern European communism. In a 1999 book published by the Ludwig von Mises Institute, Hoppe asserted that Rothbard was the leader of the "mainstream within Austrian Economics" and contrasted Rothbard with Nobel Laureate Friedrich Hayek, whom he identified as a British empiricist and an opponent of the thought of Mises and Rothbard. Hoppe acknowledged that Hayek was the most prominent Austrian economist within academia, but stated that Hayek was an opponent of the Austrian tradition which led from Carl Menger and Böhm-Bawerk through Mises to Rothbard. Austrian economist Walter Block says that the Austrian School can be distinguished from other schools of economic thought through two categories—economic theory and political theory. According to Block, while Hayek can be considered an Austrian economist, his views on political theory clash with the libertarian political theory which Block sees as an integral part of the Austrian School. Both criticism from Hoppe and Block to Hayek apply to Carl Menger, the founder of the Austrian School. Hoppe emphasizes that Hayek, which for him is from the English empirical tradition, is an opponent of the supposed rationalist tradition of the Austrian School; Menger made strong critiques to rationalism in his works in similar vein as Hayek's. He emphasized the idea that there are several institutions which were not deliberately created, have a kind of "superior wisdom" and serve important functions to society. He also talked about Burke and the English tradition to sustain these positions. When saying that the libertarian political theory is an integral part of the Austrian School and supposing Hayek is not a libertarian, Block excludes Menger from the Austrian School too since Menger seems to defend broader state activity than Hayek—for example, progressive taxation and extensive labour legislation. Economists of the Hayekian view are affiliated with the Cato Institute, George Mason University (GMU) and New York University, among other institutions. They include Peter Boettke, Roger Garrison, Steven Horwitz, Peter Leeson and George Reisman. Economists of the Mises–Rothbard view include Walter Block, Hans-Hermann Hoppe, Jesús Huerta de Soto and Robert P. Murphy, each of whom is associated with the Mises Institute and some of them also with academic institutions. According to Murphy, a "truce between (for lack of better terms) the GMU Austro-libertarians and the Auburn Austro-libertarians" was signed around 2011. Influence Many theories developed by "first wave" Austrian economists have long been absorbed into mainstream economics. These include Carl Menger's theories on marginal utility, Friedrich von Wieser's theories on opportunity cost and Eugen Böhm von Bawerk's theories on time preference, as well as Menger and Böhm-Bawerk's criticisms of Marxian economics. Former American Federal Reserve Chairman Alan Greenspan said that the founders of the Austrian School "reached far into the future from when most of them practiced and have had a profound and, in my judgment, probably an irreversible effect on how most mainstream economists think in this country". In 1987, Nobel Laureate James M. Buchanan told an interviewer: "I have no objections to being called an Austrian. Hayek and Mises might consider me an Austrian but, surely some of the others would not". Currently, universities with a significant Austrian presence are George Mason University, New York University, Grove City College, Loyola University New Orleans, Monmouth College, and Auburn University in the United States; King Juan Carlos University in Spain; and Universidad Francisco Marroquín in Guatemala. Austrian economic ideas are also promoted by privately funded organizations such as the Mises Institute and the Cato Institute. Theory The Austrian School theorizes that the subjective choices of individuals including individual knowledge, time, expectation and other subjective factors cause all economic phenomena. Austrians seek to understand the economy by examining the social ramifications of individual choice, an approach called methodological individualism. It differs from other schools of economic thought, which have focused on aggregate variables, equilibrium analysis and societal groups rather than individuals. In the 20th and 21st centuries, economists with a methodological lineage to the early Austrian School developed many diverse approaches and theoretical orientations. Ludwig von Mises organized his version of the subjectivist approach, which he called "praxeology", in a book published in English as Human Action in 1949. In it, Mises stated that praxeology could be used to deduce a priori theoretical economic truths and that deductive economic thought experiments could yield conclusions which follow irrefutably from the underlying assumptions. He wrote that conclusions could not be inferred from empirical observation or statistical analysis and argued against the use of probabilities in economic models. Since Mises' time, some Austrian thinkers have accepted his praxeological approach while others have adopted alternative methodologies. For example, Fritz Machlup, Friedrich Hayek and others did not take Mises' strong a priori approach to economics. Ludwig Lachmann, a radical subjectivist, also largely rejected Mises' formulation of Praxeology in favor of the verstehende Methode ("interpretive method") articulated by Max Weber. In the 20th century, various Austrians incorporated models and mathematics into their analysis. Austrian economist Steven Horwitz argued in 2000 that Austrian methodology is consistent with macroeconomics and that Austrian macroeconomics can be expressed in terms of microeconomic foundations. Austrian economist Roger Garrison writes that Austrian macroeconomic theory can be correctly expressed in terms of diagrammatic models. In 1944, Austrian economist Oskar Morgenstern presented a rigorous schematization of an ordinal utility function (the Von Neumann–Morgenstern utility theorem) in Theory of Games and Economic Behavior. Fundamental tenets In 1981, Fritz Machlup listed the typical views of Austrian economic thinking as such: Methodological individualism: in the explanation of economic phenomena, we have to go back to the actions (or inaction) of individuals; groups or "collectives" cannot act except through the actions of individual members. Groups do not think; people think. Methodological subjectivism: the judgments and choices made by individuals on the basis of whatever knowledge they have or believe to have, and whatever expectations they have regarding external developments and the consequences of their actions. Tastes and preferences: subjective valuations of goods and services determine the demand for them so that their prices are influenced by consumers. Opportunity costs: the costs of the alternative opportunities that must be foregone; as productive services are employed for one purpose, all alternative uses have to be sacrificed. Marginalism: in all economic designs, the values, costs, revenues, productivity and so on are determined by the significance of the last unit added to or subtracted from the total. Time structure of production and consumption: decisions to save reflect "time preferences" regarding consumption in the immediate, distant, or indefinite future and investments are made in view of larger outputs expected to be obtained if more time-taking production processes are undertaken. He included two additional tenets held by the Mises branch of Austrian economics: Consumer sovereignty: the influence consumers have on the effective demand for goods and services and through the prices which result in free competitive markets, on the production plans of producers and investors, is not merely a hard fact but also an important objective, attainable only by complete avoidance of governmental interference with the markets and of restrictions on the freedom of sellers and buyers to follow their own judgment regarding quantities, qualities and prices of products and services. Political individualism: only when individuals are given full economic freedom will it be possible to secure political and moral freedom. Restrictions on economic freedom lead, sooner or later, to an extension of the coercive activities of the state into the political domain, undermining and eventually destroying the essential individual liberties which the capitalistic societies were able to attain in the 19th century. Contributions to economic thought Opportunity cost The opportunity cost doctrine was first explicitly formulated by the Austrian economist Friedrich von Wieser in the late 19th century. Opportunity cost is the cost of any activity measured in terms of the value of the next best alternative foregone (that is not chosen). It is the sacrifice related to the second best choice available to someone, or group, who has picked among several mutually exclusive choices. Although a more ephemeral scarcity, expectations of the future must also be considered. Quantified as time preference, opportunity cost must also be valued with respect to one’s preference for present versus future investments. Opportunity cost is a key concept in mainstream economics and has been described as expressing "the basic relationship between scarcity and choice". The notion of opportunity cost plays a crucial part in ensuring that resources are used efficiently. Capital and interest The Austrian theory of capital and interest was first developed by Eugen Böhm von Bawerk. He stated that interest rates and profits are determined by two factors, namely supply and demand in the market for final goods and time preference. Böhm-Bawerk's theory equates capital intensity with the degree of roundaboutness of production processes. Böhm-Bawerk also argued that the law of marginal utility necessarily implies the classical law of costs. Some Austrian economists therefore entirely reject the notion that interest rates are affected by liquidity preference. Inflation In Mises's definition, inflation is an increase in the supply of money: Hayek pointed out that inflationary stimulation exploits the lag between an increase in money supply and the consequent increase in the prices of goods and services: Economic calculation problem The economic calculation problem refers to a criticism of planned economies which was first stated by Max Weber in 1920. Mises subsequently discussed Weber's idea with his student Friedrich Hayek, who developed it in various works including The Road to Serfdom. What the calculation problem essentially states is that without price signals, the factors of production cannot be allocated in the most efficient way possible, rendering planned economies inefficacious. Austrian theory emphasizes the organizing power of markets. Hayek stated that market prices reflect information, the totality of which is not known to any single individual, which determines the allocation of resources in an economy. Because socialist systems lack the individual incentives and price discovery processes by which individuals act on their personal information, Hayek argued that socialist economic planners lack all of the knowledge required to make optimal decisions. Those who agree with this criticism view it as a refutation of socialism, showing that socialism is not a viable or sustainable form of economic organization. The debate rose to prominence in the 1920s and 1930s and that specific period of the debate has come to be known by historians of economic thought as the socialist calculation debate. Mises argued in a 1920 essay "Economic Calculation in the Socialist Commonwealth" that the pricing systems in socialist economies were necessarily deficient because if the government owned the means of production, then no prices could be obtained for capital goods as they were merely internal transfers of goods in a socialist system and not "objects of exchange", unlike final goods. Therefore, they were unpriced and hence the system would be necessarily inefficient since the central planners would not know how to allocate the available resources efficiently. This led him to write "that rational economic activity is impossible in a socialist commonwealth". Business cycles The Austrian theory of the business cycle (ABCT) focuses on banks' issuance of credit as the cause of economic fluctuations. Although later elaborated by Hayek and others, the theory was first set forth by Mises, who posited that fractional reserve banks extend credit at artificially low interest rates, causing businesses to invest in relatively roundabout production processes which leads to an artificial "boom". Mises stated that this artificial "boom" then led to a misallocation of resources which he called "malinvestment" – which eventually must end in a "bust". Mises surmised how government manipulation of money and credit in the banking system throws savings and investment out of balance, resulting in misdirected investment projects that are eventually found to be unsustainable, at which point the economy has to rebalance itself through a period of corrective recession. Austrian economist Fritz Machlup summarized the Austrian view by stating, "monetary factors cause the cycle but real phenomena constitute it." For Austrians, the only prudent strategy for government is to leave money and the financial system to the free market's competitive forces to eradicate the business cycle's inflationary booms and recessionary busts, allowing markets to keep people's saving and investment decisions in place for well-coordinated economic stability and growth. A Keynesian would suggest government intervention during a recession to inject spending into the economy when people will not. However, the heart of Austrian macroeconomic theory states the government "fine tuning" through expansions and contractions in the money supply orchestrated by the government are actually the cause of business cycles because of the differing impact of the resulting interest rate changes on different stages in the structure of production. Austrian economist Thomas Woods further supports this view by arguing it is not consumption, but rather production that should be emphasized. A country cannot become rich by consuming, and therefore, by using up all their resources. Instead, production is what enables consumption as a possibility in the first place, since a producer would be working for nothing, if not for the desire to consume. Central banks According to Ludwig von Mises, central banks enable the commercial banks to fund loans at artificially low interest rates, thereby inducing an unsustainable expansion of bank credit and impeding any subsequent contraction and argued for a gold standard to constrain growth in fiduciary media. Friedrich Hayek took a different perspective not focusing on gold but focusing on regulation of the banking sector via strong central banking. Criticism General Mainstream economists generally reject modern-day Austrian economics, and argue that modern-day Austrian economists are excessively averse to the use of mathematics and statistics in economics. Austrian opposition to mathematization extends to economic theorizing only, as they argue that human behavior is too variable for overarching mathematical models to hold true across time and context. Austrians do, however, support analyzing revealed preference via mathematization to aid business and finance. Economist Paul Krugman has stated that Austrians are unaware of holes in their own thinking because they do not use "explicit models". Economist Benjamin Klein has criticized the economic methodological work of Austrian economist Israel M. Kirzner. While praising Kirzner for highlighting shortcomings in traditional methodology, Klein argued that Kirzner did not provide a viable alternative for economic methodology. Economist Tyler Cowen has written that Kirzner's theory of entrepreneurship can ultimately be reduced to a neoclassical search model and is thus not in the radical subjectivist tradition of Austrian praxeology. Cowen states that Kirzner's entrepreneurs can be modeled in mainstream terms of search. Economist Jeffrey Sachs argues that among developed countries, those with high rates of taxation and high social welfare spending perform better on most measures of economic performance compared to countries with low rates of taxation and low social outlays. He concludes that Friedrich Hayek was wrong to argue that high levels of government spending harms an economy and "a generous social-welfare state is not a road to serfdom but rather to fairness, economic equality and international competitiveness". Economist Bryan Caplan has noted that Mises has been criticized for overstating the strength of his case in describing socialism as "impossible" rather than as something that would need to establish non-market institutions to deal with the inefficiency. Methodology Critics generally argue that Austrian economics lacks scientific rigor and rejects scientific methods and the use of empirical data in modelling economic behavior. Some economists describe Austrian methodology as being a priori or non-empirical. Economist Mark Blaug has criticized over-reliance on methodological individualism, arguing it would rule out all macroeconomic propositions that cannot be reduced to microeconomic ones, and hence reject almost the whole of received macroeconomics. Economist Thomas Mayer has stated that Austrians advocate a rejection of the scientific method which involves the development of empirically falsifiable theories. Furthermore, economists have developed numerous experiments that elicit useful information about individual preferences. Although economist Leland Yeager is sympathetic to Austrian economics, he rejects many favorite views of the Misesian group of Austrians, in particular "the specifics of their business-cycle theory, ultra-subjectivism in value theory and particularly in interest-rate theory, their insistence on unidirectional causality rather than general interdependence, and their fondness for methodological brooding, pointless profundities, and verbal gymnastics". Economist Paul A. Samuelson wrote in 1964 that most economists believe that economic conclusions reached by pure logical deduction are limited and weak. According to Samuelson and Caplan, Mises' deductive methodology also embraced by Murray Rothbard and to a lesser extent by Mises' student Israel Kirzner was not sufficient in and of itself. Business cycle theory Mainstream economic research regarding Austrian business cycle theory finds that it is inconsistent with empirical evidence. Noted economists such as Gordon Tullock, Milton Friedman and Paul Krugman have said that they regard the theory as incorrect. Austrian economist Ludwig Lachmann noted that the Austrian theory was rejected during the 1930s: Theoretical objections Some economists have argued that Austrian business cycle theory requires bankers and investors to exhibit a kind of irrationality because the Austrian theory posits that investors will be fooled repeatedly (by temporarily low interest rates) into making unprofitable investment decisions. Milton Friedman objected to the policy implications of the theory, stating the following in a 1998 interview: Empirical objections In 1969, Milton Friedman examined the history of business cycles in the United States and wrote that there "appears to be no systematic connection between the size of an expansion and of the succeeding contraction", contradicting business cycle theories (such as the Austrian business cycle theory) which rely on that premise. He analyzed the issue using newer data in 1993, and again reached the same conclusion. Referring to Friedman's discussion of the business cycle, Austrian economist Roger Garrison argued that Friedman's empirical findings are "broadly consistent with both Monetarist and Austrian views" and goes on to argue that although Friedman's model "describes the economy's performance at the highest level of aggregation, Austrian theory offers an insightful account of the market process that might underlie those aggregates". See also Carl Menger Chicago school of economics Criticism of the Federal Reserve Eugen von Böhm-Bawerk Friedrich Hayek Hans-Hermann Hoppe Hard money (policy) Henry Hazlitt Israel Kirzner List of Austrian intellectual traditions List of Austrian School economists Ludwig von Mises New institutional economics Perspectives on capitalism by school of thought School of Salamanca Notes and references Further reading Boettke, Peter J.; Coyne, Christopher J. (2023). "New Thinking in Austrian Economics". Annual Review of Economics 15 (1). PDF . (Excerpt via Amazon). External links Understanding Austrian Economics by Henry Hazlitt Schools of economic thought Libertarian theory

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https://en.wikipedia.org/wiki/Aarhus

Aarhus

Aarhus (, , ; officially spelled Århus from 1948 until 1 January 2011) is the second-largest city in Denmark and the seat of Aarhus Municipality. It is located on the eastern shore of Jutland in the Kattegat sea and approximately northwest of Copenhagen. Dating back to the late 8th century, Aarhus was founded as a harbour settlement at the mouth of the Aarhus River and quickly became a trade hub. The first Christian church was built here around the year 900 and later in the Viking Age the town was fortified with defensive ramparts. The bishopric of Aarhus grew steadily stronger and more prosperous, building several religious institutions in the town during the early Middle Ages. Trade continued to improve, although it was not until 1441 that Aarhus was granted market town privileges, and the population of Aarhus remained relatively stable until the 19th century. The city began to grow significantly as trade prospered in the mid-18th century, but not until the mid-19th century did the Industrial Revolution bring real growth in population. The first railway line in Jutland was built here in 1862. In 1928, the first university in Jutland was founded in Aarhus and today it is a university city and the largest centre for trade, services, industry, and tourism in Jutland. Aarhus Cathedral is the longest cathedral in Denmark with a total length of . The Church of our Lady (Vor Frue Kirke) was originally built in 1060, making it the oldest stone church in Scandinavia. The City Hall, designed by Arne Jacobsen and Erik Møller, was completed in 1941 in a modern Functionalist style. Aarhus Theatre, the largest provincial theatre in Denmark, opposite the cathedral on Bispetorvet, was built by Hack Kampmann in the Art Nouveau style and completed in 1916. Musikhuset Aarhus (concert hall) and Det Jyske Musikkonservatorium (Royal Academy of Music, Aarhus/Aalborg) are also of note, as are its museums including the open-air museum Den Gamle By, the art museum ARoS Aarhus Kunstmuseum, the Moesgård Museum and the women's museum Kvindemuseet. The city's major cultural institutions include Den Gamle By, ARoS Aarhus Kunstmuseum, the Moesgård Museum, Gender Museum Denmark, Musikhuset Aarhus and Aarhus Theatre. Known as (lit. City of Smiles) it is the Danish city with the youngest demographics and home to Scandinavia's largest university, Aarhus University. Commercially, the city is the principal container port in the country, and major Danish companies such as Vestas, Arla Foods, Salling Group, and Jysk have their headquarters there. Etymology The name originates from the city's location at the mouth of (Aarhus River). It is a compound of the two words , genitive of ("river", Modern Danish ), and ("mouth", in Modern Icelandic this word, spelt , is still used for "river delta"). In Valdemar's Census Book (1231) the city was called Arus, and in Icelandic it was known as , later written as Aars. Spelling The spelling "Aarhus" is first found in 1406 and gradually became the norm in the 17th century. With the Danish spelling reform of 1948, "Aa" was changed to "Å". Some Danish cities resisted the change but Aarhus city council opted to change the name. In 2010, the city council voted to change the name back from to again with effect from 1 January 2011. It is still grammatically correct to write geographical names with the letter Å and local councils are allowed to use the Aa spelling as an alternative and most newspapers and public institutions will accept either. Some official authorities such as the Danish Language Committee, publisher of the Danish Orthographic Dictionary, still retain as the main name, providing as a second option, in brackets and some institutions are still using explicitly in their official name, such as the local newspaper and the schools and . "Aa" was used by some major institutions between 1948 and 2011 as well, such as Aarhus University or the largest local sports club, (AGF), which has never used the "Å"-spelling. Certain geographically affiliated names have been updated to reflect the name of the city, such as the Aarhus River, changed from to . History Early history Founded in the early Viking Age, Aarhus is one of the oldest cities in Denmark, along with Ribe and Hedeby. The original Aros settlement was situated on the northern shores of a fjord by the mouth of the Aarhus River, right where the city center is today. It quickly became a hub for sea-going trade due to its position on intersecting trade routes in the Danish straits and the fertile countryside. The trade, however, was not nearly as prominent as that in Ribe and Hedeby during the Viking Age, and it was primarily linked to Norway as evidenced by archaeological finds. A shipbuilding yard from the Viking Age was uncovered upriver in 2002 by archaeologists. It was located at a place formerly known as Snekkeeng, or Snekke Meadow in English ('Snekke' is a type of longship), east of the Brabrand Lake close to Viby, and it was in use for more than 400 years from the late 700s till around the mid-1200s. Archaeological evidence indicates that Aarhus was a town as early as the last quarter of the 8th century. Discoveries after a 2003 archaeological dig included half-buried longhouses, firepits, glass pearls and a road dated to the late 700s. Several excavations in the inner city since the 1960s have revealed wells, streets, homes and workshops, and inside the buildings and adjoining archaeological layers, everyday utensils like combs, jewellery and basic multi-purpose tools from approximately the year 900 have been unearthed. The early town was fortified with defensive earthen ramparts in the first part of the 900s, possibly in the year 934 on order from king Gorm the Old. The fortifications were later improved and expanded by his son Harald Bluetooth, encircling the settlement much like the defence structures found at Viking ring fortresses elsewhere. Together with the town's geographical placement, this suggests that Aros became an important military centre in the Viking Age. There are also strong indications of a former royal residence from the same period in Viby, a few kilometres south of the Aarhus city centre. The centre of Aarhus was originally a pagan burial site until Aarhus's first Christian church, Holy Trinity Church, a timber structure, was built upon it during the reign of Frode, King of Jutland, around 900. The bishopric of Aarhus dates back to at least 948 when Adam of Bremen reported that the missionary bishop Reginbrand of Aros attended the synod of Ingelheim in Germany, but the late Viking Age during the Christianization of Scandinavia was a turbulent and violent time with several naval attacks on the town, such as Harald Hardrada's assault around 1050, when the Holy Trinity Church was burned to the ground. Despite the conflicts, Aarhus continued to prosper from the trade and the finding of six runestones in and around Aarhus indicates the city had some significance around the year 1000, as only wealthy nobles traditionally used them. The bishopric diocese was obliterated for almost a hundred years after Reginbrand in 988, but in 1060 a new bishop Christian was ordained and he founded a new church in Aarhus, Sankt Nicolai Domkirke (St. Nicholas Cathedral), this time in stone. It was erected outside the town fortifications, and stood finished in 1070 at the site where Church of Our Lady stands today, but only an underground crypt remains. Middle Ages The growing influence of the Church during the Middle Ages gradually turned Aarhus, with its bishopric, into a prosperous religious centre. Many public and religious buildings were built in and around the town; notably Aarhus Cathedral was initiated in the late 12th century by the influential bishop Peder Vognsen, and around 1200, Aros had a total of four churches. The 13th century also marks a thorough reorganisation, erasing most of the town's original layout with new streets, relocations, dismantling and new constructions. The Church clearly had the upper hand in the Aarhus region during medieval times, and the large bishopric of Aarhus prospered and expanded territory, reaching as far as Viborg in extent. In 1441, Christopher III issued the oldest known charter granting market town status, although similar privileges may have existed as far back as the 12th century. The charter is the first official recognition of the town as a regional power and is by some considered Aarhus's birth certificate. The commercial and religious status spurred town growth, and in 1477 the defensive earthen ramparts, which had ringed the town since the Viking Age, were abandoned to accommodate expansion. Parts of the ramparts still exist today and can be experienced as steep slopes at the riverside, and they have also survived in some place names of the inner city, including the streets of Volden (The Rampart) and Graven (The Moat). Aarhus grew to become one of the largest cities in the country by the early 16th century. In 1657, octroi was imposed in larger Danish cities which changed the layout and face of Aarhus over the following decades. Wooden city walls were erected to prevent smuggling, with gates and toll booths on the major thoroughfares, Mejlgade and Studsgade. The city gates funnelled most traffic through a few streets where merchant quarters were built. In the 17th century, Aarhus entered a period of recession as it suffered blockades and bombardments during the Swedish wars and trade was dampened by the preferential treatment of the capital by the state. Not until the middle of the 18th century did growth return, in large part due to trade with the large agricultural catchment areas around the city; grain, particularly, proved to be a remunerative export. The first factories were established at this time, as the Industrial Revolution reached the country, and in 1810 the harbour was expanded to accommodate growing trade. Industrialisation Aarhus began to prosper in the 1830s as the industrial revolution reached the city and factories with steam-driven machinery became more productive. In 1838, the electoral laws were reformed leading to elections for the 15 seats on the city council. The rules were initially very strict, allowing only the wealthiest citizens to run. In the 1844 elections, only 174 citizens qualified out of a total population of more than 7,000. The first city council, mainly composed of wealthy merchants and industrialists, quickly looked to improve the harbour, situated along the Aarhus River. Larger ships and growing freight volumes made a river harbour increasingly impractical. In 1840, the harbour was moved to the coast, north of the river, where it became the largest industrial harbour outside Copenhagen over the following 15 years. From the outset, the new harbour was controlled by the city council, as it is to this day. During the First Schleswig War, Aarhus was occupied by German troops from 21 June to 24 July 1849. The city was spared any fighting, but in Vejlby north of the city a cavalry skirmish known as Rytterfægtningen took place which stopped the German advance through Jutland. The war and occupation left a notable impact on the city as many streets, particularly on Frederiksbjerg, are named after Danish officers of the time. Fifteen years later, in 1864, the city was occupied again, this time for seven months, during the Second Schleswig War. In spite of wars and occupation, the city continued to expand and develop. In 1851, the octroi was abolished and the city walls were removed to provide easier access for trade. Regular steamship links with Copenhagen had begun with the Jylland in 1825–26 and the Dania (1827–36), and in 1862 Jutland's first railway was established between Aarhus and Randers. In the second half of the 19th century, industrialisation came into full effect and a number of new industries emerged around production and refinement of agricultural products, especially oil and butter. Many companies from this time would come to leave permanent iconic marks on Aarhus. The Ceres Brewery was established in 1856 and served as Aarhus's local brewery for more than 150 years, gradually expanding into an industrial district known as Ceres-grunden (lit.: the Ceres-ground). In 1896, local farmers and businessmen created Korn- og Foderstof Kompagniet (KFK), focused on grain and feedstuffs. KFK established departments all over the country, while its headquarters remained in Aarhus where its large grain silos still stand today. Otto Mønsted created the Danish Preserved Butter Company in 1874, focusing on butter export to England, China and Africa and later founded the Aarhus Butterine Company in 1883, the first Danish margarine factory. His company became an important local employer, with factory employees increasing from 100 in 1896 to 1,000 in 1931, partaking in the effective transformation of the city from a regional trade hub to an industrial centre. Other new factories of note included the dockyard Aarhus Flydedok and the oil mill Århus Oliefabrik. Aarhus became the largest provincial city in the country by the turn of the century and the city marketed itself as the "Capital of Jutland". The population increased from 15,000 in 1870 to 52,000 in 1901 and, in response, the city annexed large land areas to develop new residential quarters such as Trøjborg, Frederiksbjerg and Marselisborg. Many of its cultural institutions were also established at this time such as Aarhus Theatre (1900), the original State Library (1902), Aarhus University (1928) and several hospitals. Second World War On 9 April 1940, Nazi Germany invaded Denmark, occupying Aarhus the following day; the occuption lasted for five years. This was a destructive period with major disasters, loss of life and economic depression. The Port of Aarhus became a hub for supplies to the Baltics and Norway, while the surrounding rail network supplied the Atlantic Wall in west Jutland and cargo headed for Germany. Combined, these factors resulted in a strong German presence, especially in 1944–45. Small resistance groups first appeared in 1941–42 but the first to co-ordinate with the Freedom Council was the Samsing Group, responsible for most operations from early 1943. The Samsing group, along with others in and around Aarhus, was dismantled in June 1944 when Grethe "Thora" Bartram turned her family and acquaintances over to German authorities. In response, requests for assistance were sent to contacts in England and in October 1944 the Royal Air Force bombed the Gestapo headquarters successfully destroying archives and obstructing the ongoing investigation. In the summer of 1944 the Copenhagen-based resistance group Holger Danske helped establish the 5 Kolonne group and an SOE agent arrived from England to liaison with the L-groups. Subsequently, resistance operations escalated which was countered with Schalburgtage terror operations by the Peter group. The increasingly destructive occupation was compounded when an ammunition barge exploded in July 1944, destroying much of the harbour area. On 5 May 1945 German forces in Denmark surrendered but during the transitional period fighting broke out resulting in 22 dead. On 8 May the British Royal Dragoons entered the city. Post-World War II years In the 1970s and 1980s the city entered a period of rapid economic growth and the service sector overtook trade, industry and crafts as the leading sector of employment for the first time. Workers gradually began commuting to the city from most of east and central Jutland as the region became more interconnected. The student population tripled between 1965 and 1977 turning the city into a Danish centre of research and education. The growing and comparably young population initiated a period of creativity and optimism; Gaffa and the KaosPilot school were founded in 1983 and 1991 respectively, and Aarhus was at the centre of a renaissance in Danish rock and pop music launching bands and musicians such as TV2, Gnags, Thomas Helmig, Bamses Venner, Anne Dorte Michelsen, Mek Pek and Shit & Chanel. The 2000s Since the turn of the millennium, Aarhus has seen an unprecedented building boom with many new institutions, infrastructure projects, city districts and recreational areas. Several of the construction projects are among the largest in Europe, such as the New University Hospital (DNU) and the harbourfront redevelopment. Both the skyline and land use of the inner city is changing, as former industrial sites are being redeveloped into new city districts and neighbourhoods. Starting in 2008, the former docklands known as De Bynære Havnearealer (The Peri-urban Harbour-areas), and closest to the city seaside, are being converted to new mixed-use districts. It is among the largest harbourfront projects in Europe. The northern part dubbed Aarhus Ø (Aarhus Docklands) is almost finished as of 2018, while the southern district dubbed Sydhavnskvarteret (The South-harbour neighbourhood) is only starting to be developed. The adjacent site of Frederiks Plads at the former DSB repair facilities have been under construction since 2014 as a new business and residential quarter. The main bus terminal close by is planned to be moved to the central railway station and the site will be redeveloped to a new residential neighbourhood. Elsewhere in the inner city, the site of the former Ceres breweries was redeveloped in 2012-2019 as a new mixed use neighbourhood known as CeresByen. Construction of Aarhus Letbane, the first light rail system in the country, commenced in 2013, and the first increment was finished in December 2017. Since then, the lightrail service has been expanded with two intercity sections to the towns of Odder and Grenå, respectively, and also includes a northward leg to the suburb of Lisbjerg. The light rail system is planned to tie many other suburbs closer to central Aarhus in the future, with the next phase including local lines to Brabrand in the east and Hinnerup to the north. Accelerating growth since the early 2000s, brought the inner urban area to roughly 260,000 inhabitants by 2014. The rapid growth is expected to continue until at least 2030 when Aarhus municipality has set an ambitious target for 375,000 inhabitants. Geography Aarhus is located at the Bay of Aarhus facing the Kattegat sea in the east with the peninsulas of Mols and Helgenæs across the bay to the northeast. Mols and Helgenæs are both part of the larger regional peninsula of Djursland. A number of larger cities and towns is within easy reach from Aarhus by road and rail, including Randers ( by road north), Grenå (northeast), Horsens ( south) and Silkeborg ( east). Topography At Aarhus's location, the Bay of Aarhus provides a natural harbour with a depth of quite close to the shore. Aarhus was founded at the mouth of a brackish water fjord, but the original fjord no longer exists, as it has gradually narrowed into what is now the Aarhus River and the Brabrand Lake, due to natural sedimentation. The land around Aarhus was once covered by forests, remains of which exist in parts of Marselisborg Forest to the south and Riis Skov to the north. Several lakes extend west from the inner city as the landscape merges with the larger region of Søhøjlandet with heights exceeding at Himmelbjerget between Skanderborg and Silkeborg. The highest natural point in Aarhus Municipality is Jelshøj at 128 metres above sea level, in the southern district of Højbjerg. The hilltop is home to a Bronze Age barrow shrouded in local myths and legends. The hilly area around Aarhus consists of a morainal plateau from the last ice age, broken by a complex system of tunnel valleys. The most prominent valleys of this network are the Aarhus Valley in the south, stretching inland east–west with the Aarhus River, Brabrand Lake, Årslev Lake and Tåstrup Lake, and the Egå Valley to the north, with the stream of Egåen, Egå Engsø, the bog of Geding-Kasted Mose and Geding Lake. Most parts of the two valleys have been drained and subsequently farmed, but in the early 2000s some of the drainage was removed and parts of the wetlands were restored for environmental reasons. The valley system also includes the stream of Lyngbygård Å in the west and valleys to the south of the city, following erosion channels from the pre-quaternary. By contrast, the Aarhus River Valley and the Giber River Valley are late glacial meltwater valleys. The coastal cliffs along the Bay of Aarhus consist of shallow tertiary clay from the Eocene and Oligocene (57 to 24 million years ago). Climate Aarhus has a temperate oceanic climate (Köppen: Cfb) and the weather is constantly influenced by major weather systems from all four ordinal directions, resulting in unstable conditions throughout the year. Temperature varies a great deal across the seasons with a mild spring in April and May, warmer summer months from June to August, frequently rainy and windy autumn months in October and September and cooler winter months, often with frost and occasional snow, from December to March. The city centre experiences the same climatic effects as other larger cities with higher wind speeds, more fog, less precipitation and higher temperatures than the surrounding, open land. Western winds from the Atlantic and North Sea are dominant resulting in more precipitation in western Denmark. In addition, Jutland rises sufficiently in the centre to lift air to higher, colder altitudes contributing to increased precipitation in eastern Jutland. Combined, these factors make east and south Jutland comparatively wetter than other parts of the country. Average temperature over the year is with February being the coldest month () and August the warmest (). Temperatures in the sea can reach in June to August, but it is not uncommon for beaches to register locally. The geography in the area affects the local climate of the city with the Aarhus Bay imposing a temperate effect on the low-lying valley floor where central Aarhus is located. Brabrand Lake to the west further contributes to this effect and as a result, the valley has a comparably mild, temperate climate. The sandy ground on the valley floor dries up quickly after winter and warms faster in the summer than the surrounding hills of moist-retaining boulder clay. These conditions affect crops and plants that often bloom 1–2 weeks earlier in the valley than on the northern and southern hillsides. Because of the northern latitude, the number of daylight hours varies considerably between summer and winter. On the summer solstice, the sun rises at 04:26 and sets at 21:58, providing 17 hours 32 minutes of daylight. On the winter solstice, it rises at 08:37 and sets at 15:39 with 7 hours and 2 minutes of daylight. The difference in length of days and nights between summer and winter solstices is 10 hours and 30 minutes. Politics and administration Aarhus is the seat of Aarhus Municipality, and Aarhus City Council (Aarhus Byråd) is also the municipal government with headquarters in Aarhus City Hall. The Mayor of Aarhus since 2010 is Jacob Bundsgaard of the Social Democrats. Municipal elections are held every fourth year on the third Tuesday of November with the next election in 2021. The city council consists of 31 members elected for four-year terms. When an election has determined the composition of the council, it elects a mayor, two deputy mayors and five aldermen from their ranks. Anyone who is eligible to vote and who resides within the municipality can run for a seat on the city council provided they can secure endorsements and signatures from 50 inhabitants of the municipality. The first publicly elected mayor of Aarhus was appointed in 1919. In the 1970 Danish Municipal Reform the current Aarhus municipality was created by merging 20 municipalities. Aarhus was the seat of Aarhus County until the 2007 Danish municipal reform, which substituted the Danish counties with five regions and replaced Aarhus County with Central Denmark Region (Region Midtjylland), seated in Viborg. Subdivisions Aarhus Municipality has 45 electoral wards and polling stations in four electoral districts for the Folketing (national Parliament). The diocese of Aarhus has four deaneries composed of 60 parishes within Aarhus municipality. Aarhus municipality contains 21 postal districts and some parts of another 9. The urban area of Aarhus and the immediate suburbs are divided into the districts Aarhus C, Aarhus N, Aarhus V, Viby J, Højbjerg and Brabrand. Environmental planning Aarhus has increasingly been investing in environmental planning and, in accordance with national policy, aims to be -neutral and independent of fossil fuels for heating by 2030. The municipal power plants were adapted for this purpose in the 2010s. In 2015, the municipality took over three private straw-fired heating plants and the year after, a new 77 MW combined heat and power biomass plant at Lisbjerg Power Station was completed while Studstrup Power Station finished a refit to move from coal to wood chips. In conjunction with the development of the Docklands district there are plans for a utility-scale seawater heat pump which will take advantage of fluctuating electricity prices to supply the district heating system. Since 2015, the city has been implementing energy-saving LED technology in street lighting; by January 2019, about half of the municipal street lighting had been changed. Apart from reducing the city's CO2 emissions, it saves 30% on the electricity bill, thereby making it a self-financed project over a 20-year period. The municipality aims for a coherent and holistic administration of the water cycle to protect against, or clean up, previous pollution and encourage green growth and self-sufficiency. The main issues are excessive nutrients, adapting to increased (and increasing) levels of precipitation brought on by climate change, and securing the water supply. These goals have manifested in a number of large water treatment projects often in collaboration with private partners. In the 2000s, underground rainwater basins were built across the city while the two lakes Årslev Engsø and Egå Engsø were created in 2003 and 2006 respectively. The number of sewage treatment plants is planned to be reduced from 17 to 2 by 2025, as the treatment plants in Marselisborg and Egå are scheduled for expansion to take over all waste water treatment. They have already been refitted for biogas production to become net producers of electricity and heat. To aid the new treatment plants, and avoid floodings, sewage and stormwater throughout the municipality is planned to be separated into two different drainage systems. Construction began in 2017 in several areas, but it is a long process that is scheduled to be finished by 2085. Afforestation projects have been undertaken to prevent groundwater pollution, secure drinking water, sequester , increase biodiversity, create an attractive countryside, provide easy access to nature and offer outdoor activities to the public. In 2000, the first project, the New Forests of Aarhus, was completed, which aimed to double the forest cover in the municipality and, in 2009, another phase was announced to double forest cover once more before the year 2030. The afforestation plans were realised as a local project in collaboration with private landowners, under a larger national agenda. Other projects to expand natural habitats include a rewilding effort in Geding-Kasted Bog and continuous monitoring of the four Natura 2000 areas in the municipality. Demographics Aarhus has a population of 261,570 on for a density of 2,874/km2 (7,444/sq mi). Aarhus municipality has a population of 330,639 on 468 km2 with a density of 706/km2 (1,829/sq mi). Less than a fifth of the municipal population resides beyond city limits and almost all live in an urban area. The population of Aarhus is both younger and better-educated than the national average which can be attributed to the high concentration of educational institutions. More than 40% of the population have an academic degree while only some 14% have no secondary education or trade. The largest age group is 20- to 29-year-olds and the average age is 37.5, making it the youngest city in the country and one of its youngest municipalities. Women have slightly outnumbered men for many years. The city is home to 75 different religious groups and denominations, most of which are Christian or Muslim with a smaller number of Buddhist, Hindu, and Jewish communities. Since the 1990s there has been a marked growth in diverse new spiritual groups although the total number of followers remains small. The majority of the population are members of the Protestant state church, Church of Denmark, which is by far the largest religious institution both in the city and the country as a whole. Some 20% of the population are not officially affiliated with any religion, a percentage that has been slowly rising for many years. During the 1990s there was significant immigration from Turkey and in the 2000s, there was a fast growth in the overall immigrant community, from 27,783 people in 1999 to 40,431 in 2008. The majority of immigrants have roots outside Europe and the developed world, comprising some 25,000 people from 130 different nationalities, with the largest groups coming from the Middle East and North Africa. Some 15,000 have come from within Europe, with Poland, Germany, Romania and Norway being the largest contributors. Many immigrants have established themselves in the suburbs of Brabrand, Hasle and Viby, where the percentage of inhabitants with foreign origins has risen by 66% since 2000. This has resulted in a few so-called ghettos, defined as residential areas with more than half of inhabitants from non-Western countries and with relatively high levels of poverty and/or crime. Gellerup is the most notable neighbourhood in that respect. The ghetto-labelling has been criticized as unnecessarily stigmatising and counterproductive for social and economical development of the related areas. Economy The economy of Aarhus is predominantly knowledge- and service-based, strongly influenced by the University of Aarhus and the large healthcare industry. The service sector dominates the economy and is growing as the city transitions away from manufacturing. Trade and transportation remain important sectors, benefiting from the large port and central position on the rail network. Manufacturing has been in slow but steady decline since the 1960s while agriculture has long been a marginal sector within the municipality. The municipality is home to 175,000 jobs with some 100,000 in the private sector and the rest split between state, region and municipality. The region is a major agricultural producer, with many large farms in the outlying districts. People commute to Aarhus from as far away as Randers, Silkeborg and Skanderborg and almost a third of those employed within the Aarhus municipality commute from neighbouring communities. Aarhus is a centre for retail in the Nordic and Baltic countries, with expansive shopping centres, the busiest commercial street in the country and a dense urban core with many speciality shops. The job market is knowledge- and service-based, and the largest employment sectors are healthcare and social services, trade, education, consulting, research, industry and telecommunications. The municipality has more high- and middle-income jobs, and fewer low-income jobs, than the national average. Today, te majority of the largest companies in the municipality are in the sectors of trade, transport and media. The wind power industry has strong roots in Aarhus and the larger region of Central Jutland, and nationally, most of the revenue in the industry is generated by companies in the greater Aarhus area. The wind industry employs about a thousand people within the municipality, making it a central component in the local economy. The biotech industry is well-established in the city, with many small- and medium-sized companies mainly focused on research and development. There are multiple Big Tech companies with offices in the city, including Uber and Google. Several major companies are headquartered in Aarhus, including four of the ten largest in the country. These include Arla Foods, one of the largest dairy groups in Europe, Salling Group, Denmark's largest retailer, Jysk, a worldwide retailer of household goods, Vestas, a global wind turbine manufacturer, Terma A/S, a major defence and aerospace manufacturer, Per Aarsleff, a civil engineering company and several large retail companies. Other large employers of note include Krifa, Systematic A/S,), and Bestseller A/S. Since the early 2000s, the city has experienced an influx of larger companies moving from other parts of the Jutland peninsula. Port of Aarhus The Port of Aarhus is one of the largest industrial ports in northern Europe with the largest container terminal in Denmark, processing more than 50% of Denmark's container traffic and accommodating the largest container vessels in the world. It is a municipal self-governing port with independent finances. The facilities handle some 9.5 million tonnes of cargo a year (2012). Grain is the principal export, while feedstuffs, stone, cement and coal are among the chief imports. Since 2012 the port has faced increasing competition from the Port of Hamburg and freight volumes have decreased somewhat from the peak in 2008. The ferry terminal presents the only alternative to the Great Belt Link for passenger transport between Jutland and Zealand. It has served different ferry companies since the first steamship route to Copenhagen opened in 1830. Currently, Mols-Linien operates the route and annually transports some two million passengers and a million vehicles. Additional roll-on/roll-off cargo ferries serve Finland and Kalundborg on a weekly basis and smaller outlying Danish ports at irregular intervals. Since the early 2000s the port has increasingly become a destination for cruise lines operating in the Baltic Sea. Tourism The ARoS Art Museum, the Old Town Museum and Tivoli Friheden are among Denmark's top tourist attractions. With a combined total of almost 1.4 million visitors they represent the driving force behind tourism but other venues such as Moesgård Museum and Kvindemuseet are also popular. The city's extensive shopping facilities are also said to be a major attraction for tourists, as are festivals, especially NorthSide and SPOT. Many visitors arrive on cruise ships: in 2012, 18 vessels visited the port with over 38,000 passengers. In the 2010s, there was a significant expansion of tourist facilities, culminating in the opening of the 240-room Comwell Hotel in July 2014, which increased the number of hotel rooms in the city by 25%. Some estimates put the number of visitors spending at least one night as high as 750,000 a year, most of them Danes from other regions, with the remainder coming mainly from Norway, Sweden, northern Germany and the United Kingdom. Overall, they spend roughly DKK 3 billion (€402 million) in the city each year. The primary motivation for tourists choosing Aarhus as a destination is experiencing the city and culture, family and couples vacation or as a part of a round trip in Denmark. The average stay is little more than three days on average. There are more than 30 tourist information spots across the city. Some of them are staffed, while others are online, publicly accessible touchscreens. The official tourist information service in Aarhus is organised under VisitAarhus, a corporate foundation initiated in 1994 by Aarhus Municipality and local commercial interest organisations. Research parks The largest research park in Aarhus is INCUBA Science Park, focused on IT and biomedical research, It is based on Denmark's first research park, Forskerpark Aarhus (Research Park Aarhus), founded in 1986, which in 2007 merged with another research park to form INCUBA Science Park. The organisation is owned partly by Aarhus University and private investors and aims to foster close relationships between public institutions and startup companies. It is physically divided across 4 locations after a new department was inaugurated in Navitas Park in 2015, which it will share with the Aarhus School of Marine and Technical Engineering and AU Engineering. Another major centre for knowledge is Agro Food Park in Skejby, established to facilitate co-operation between companies and public institutions working within food science and agriculture. In January 2017 Arla Foods will open the global innovation centre Arla Nativa in Agro Food Park and in 2018 Aarhus University is moving the Danish Centre for Food and Agriculture there as well. In 2016, some 1000 people worked at Agro Food Park, spread across 50 companies and institutions and in August 2016 Agro Food Park management published plans to expand facilities from 92,000 m2 to . In addition, Aarhus is home to the Aarhus School of Architecture, one of two Danish Ministry of Education institutions that provide degree programs in architecture, and some of the largest architecture firms in the Nordic countries such as Schmidt Hammer Lassen Architects, Arkitema Architects and C. F. Møller Architects. Taken together these organisations form a unique concentration of expertise and knowledge in architecture outside Copenhagen, which the Danish Ministry of Business and Growth refers to as (the architecture cluster). To promote the "cluster", the School of Architecture will be given new school buildings centrally in the new Freight Station Neighborhood, planned for development in the 2020s. In the interim, the city council supports a culture, business and education centre in the area, which may continue in the future neighbourhood in some form. The future occupants of the neighbourhood will be businesses and organisations selected for their ability to be involved in the local community, and it is hoped that the area will evolve into a hotspot for creativity and design. Cityscape Aarhus has developed in stages, from the Viking Age to modern times, all visible in the city today. Many architectural styles are represented in different parts of the city such as Romanesque, Gothic, Renaissance, Baroque, Rococo, National Romantic, Nordic Classicism, Neoclassical, Empire and Functionalism. The city has developed around the main transport hubs – the river, the harbour, and later the railway station – and as a result, the oldest parts are also the most central and busiest today. The streets of Volden (The Rampart) and Graven (The Moat) testify to the defences of the initial Viking town, and Allégaderingen in Midtbyen roughly follows the boundaries of that settlement. The street network in the inner city formed during the Middle Ages with narrow, curved streets and low, dense housing by the river and the coast. Vesterport (Westward Gate) still bears the name of the medieval city gate and the narrow alleyways Posthussmøgen and Telefonsmøgen are remnants of toll stations from that time. The inner city has the oldest preserved buildings, especially the Latin Quarter, with houses dating back to the early 17th century in Mejlgade and Skolegade. Medieval merchants' mansions with courtyards can be seen in Klostergade, Studsgade and Skolegade. By far, the largest part of the present-day city was built during and after the industrialization of the late 1800s, and the most represented architectural styles today are historicism and modernism, especially the subgenre of Danish functionalism of which there are many fine examples. The building boom of the 2000s has imprinted itself on Aarhus with a redeveloped harbourfront, many new neighbourhoods (also in the inner city), and a revitalized public space. It is also beginning to change the skyline with several dominating high-rises. Developments In recent years, Aarhus has experienced a large demand in housing and offices, spurring a construction boom in some parts of the city. The newly built city district of Aarhus Ø, formerly docklands, includes major housing developments, mostly consisting of privately owned apartments, designed by architects such as CEBRA, and JDS Architects. In the second quarter of 2012, the population of the area stood at only 5; however, that number had risen to 3,940 by October 2019. The main public transportation service is bus line 23, as well as Østbanetorvet train station. Plans to service the area by the light rail line Aarhus Letbane have now been shelved. Landmarks Aarhus Cathedral (Århus Domkirke) in the centre of Aarhus, is the longest and tallest church in Denmark at and in length and height respectively. Originally built as a Romanesque basilica in the 13th century, it was rebuilt and enlarged as a Gothic cathedral in the late 15th and early 16th centuries. Even though the cathedral stood finished around 1300, it took more than a century to build; the associated cathedral school of Aarhus Katedralskole was already founded in 1195 and ranks as the 44th oldest school in the world. Another important and historic landmark in the inner city, is the Church of Our Lady (Vor Frue Kirke) also from the 13th century in Romanesque and Gothic style. It is smaller and less impressive, but it was the first cathedral of Aarhus and founded on an even older church constructed in 1060; the oldest stone church in Scandinavia. Langelandsgade Kaserne in National Romantic Style from 1889 is the oldest former military barracks left in the country; home to the university Department of Aesthetics and Communication since 1989. Marselisborg Palace (Marselisborg Slot), designed by Hack Kampmann in Neoclassical and Art Nouveau styles, was donated by the city to Prince Christian and Princess Alexandrine as a wedding present in 1898. The Aarhus Custom House (Toldkammeret) from 1898, is said to be Hack Kampmann's finest work. Tivoli Friheden (Tivoli Freedom) opened in 1903 and has since been the largest amusement park in the city and a tourist attraction. Aarhus Theatre from 1916 in the Art Nouveau style is the largest provincial theatre in Denmark. The early buildings of Aarhus University, especially the main building completed in 1932, designed by Kay Fisker, Povl Stegmann and by C.F. Møller have gained an international reputation for their contribution to functionalist architecture. The City Hall (Aarhus Rådhus) from 1941 with an iconic tower clad in marble, was designed by Arne Jacobsen and Erik Møller in a modern Functionalist style. Culture Aarhus is home to many annual cultural events and festivals, museums, theatres, and sports events of both national and international importance, and presents some of the largest cultural attractions in Denmark. There is a long tradition of music from all genres, and many Danish bands have emerged from Aarhus. Libraries, cultural centres and educational institutions present free or easy opportunities for the citizens to participate in, engage in, or be creative with cultural events and productions of all kinds. Since 1938, Aarhus has marketed itself as Smilets by (City of smiles) which has become both an informal moniker and official slogan. In 2011, the city council opted to change the slogan to "Aarhus. Danish for Progress" but it was unpopular and abandoned after just a few years. Other slogans that have occasionally been used are Byen ved havet (City by the sea), Mellem bugt og bøgeskov (Between bay and beechwood) and Verdens mindste storby (World's smallest big city). Aarhus is featured in popular songs such as Hjem til Aarhus by På Slaget 12, Lav sol over Aarhus by Gnags, 8000 Aarhus C by Flemming Jørgensen, Pigen ud af Aarhus by Tina Dickow and Slingrer ned ad Vestergade by Gnags. In 1919, the number Sangen til Aarhus (Song to Aarhus) had become a popular hit for a time, but the oldest and perhaps best known "national anthem" for the city is the classical Aarhus Tappenstreg from 1872 by Carl Christian Møller which is occasionally played at official events or at performances by local marching bands and orchestras. Museums Aarhus has a range of museums, including two of the largest in the country, measured by the number of paying guests, Den Gamle By and ARoS Aarhus Kunstmuseum. Den Gamle By (The Old Town), officially Danmarks Købstadmuseum (Denmark's Market Town Museum), presents Danish townscapes from the 16th century to the 1970s with individual areas focused on different time periods. 75 historic buildings collected from different parts of the country have been brought here to create a small town in its own right. ARoS Aarhus Kunstmuseum, the city's main art museum, is one of the largest art museums in Scandinavia with a collection covering Danish art from the 18th century to the present day as well as paintings, installations and sculptures representing international art movements and artists from all over the world. The iconic glass structure on the roof, Your Rainbow Panorama, was designed by Olafur Eliasson and features a promenade offering a colourful panorama of the city. The Moesgård Museum specialises in archaeology and ethnography in collaboration with Aarhus University with exhibits on Denmark's prehistory, including weapon sacrifices from Illerup Ådal and the Grauballe Man. Kvindemuseet, the Women's Museum, from 1984 contains collections of the lives and works of women in Danish cultural history. The Occupation Museum (Besættelsesmuseum) presents exhibits illustrating the German occupation of the city during the Second World War; the University Park on the campus of Aarhus University includes the Natural History Museum with 5,000 species of animals, many in their natural surroundings; and the Steno Museum is a museum of the history of science and medicine with a planetarium. Kunsthal Aarhus (Aarhus Art Hall) hosts exhibitions of contemporary art including painting, sculpture, photography, performance art, film and video. Strictly speaking it is not a museum but an arts centre, one of the oldest in Europe, built and founded in 1917. Libraries and community centres Public libraries in Denmark are also cultural and community centres. They play an active role in cultural life and host many events, exhibitions, discussion groups, workshops, educational courses and facilitate everyday cultural activities for and by the citizens. In June 2015, the large central library and cultural centre of Dokk1 opened at the harbour front. Dokk1 also includes civil administrations and services, commercial office rentals and a large underground robotic car park and aims to be a landmark for the city and a public meeting place. The building of Dokk1 and the associated squares and streetscape is also collectively known as Urban Mediaspace Aarhus and it is the largest construction project Aarhus municipality has yet undertaken. Apart from this large main library, some neighbourhoods in Aarhus have a local library engaged in similar cultural and educational activities, but on a more local scale. The State Library (Statsbiblioteket) at the university campus has status of a national library. The city is a member of the ICORN organisation (International Cities of Refuge Network) in an effort to provide a safe haven to authors and writers persecuted in their countries of origin. There are several cultural and community centres throughout the city. This includes Folkestedet in the central Åparken, facilitating events for and by non-commercial associations, organisations and clubs, and activities for the elderly, the nearby Godsbanen at the railway yard, with workshops, events and exhibitions, and Globus1 in Brabrand facilitating sports and various cultural activities. Performing arts The city enjoys strong musical traditions, both classical and alternative, underground and popular, with educational and performance institutions such as the concert halls of Musikhuset, the opera of Den Jyske Opera, Aarhus Symfoniorkester (Aarhus Symphony Orchestra) and Det Jyske Musikkonservatorium (Royal Academy of Music, Aarhus/Aalborg). Musikhuset is the largest concert hall in Scandinavia, with seating for more than 3,600 people. Other major music venues include VoxHall, rebuilt in 1999, and the associated venue of Atlas, Train nightclub at the harbourfront, and Godsbanen, a former rail freight station. The acting scene in Aarhus is diverse, with many groups and venues engaged in a broad span of genres, from animation theatre and children's theatre to classical theatre and improvisational theatre. Aarhus Teater is the oldest and largest venue with mostly professional classical acting performances. Svalegangen, the second largest theatre, is more experimental with its performances and other notable groups and venues includes EntréScenen, Katapult, Gruppe 38, Helsingør Teater, Det Andet Teater and Teater Refleksion as well as dance venues like Bora Bora. The cultural center of Godsbanen includes several scenes and stages and the Concert Halls of Musikhuset also stage theatrical plays regularly and is home to the children's theatre Filuren and a comedy club. The city hosts a biannual international theatre festival, International Living Theatre (ILT), with the next event being scheduled for 2021. Since 2010 the music production centre of PROMUS (Produktionscentret for Rytmisk Musik) has supported the rock scene in the city along with the publicly funded ROSA (Dansk Rock Samråd), which promotes Danish rock music in general. Aarhus is known for its musical history. Fuelled by a relatively young population jazz clubs sprang up in the 1950s which became a tour stop for many iconic American Jazz musicians. By the 1960s, the music scene diversified into rock and other genres and in the 1970s and 1980s, Aarhus became a centre for rock music, fostering iconic bands such as Kliché, TV-2 and Gnags and artists such as Thomas Helmig and Anne Linnet. Acclaimed bands since the 1970s include Under Byen, Michael Learns to Rock, Nephew, Carpark North, Spleen United, VETO, Hatesphere and Illdisposed in addition to individual performers such as Medina and Tina Dico. Events and festivals Aarhus hosts many annual or recurring festivals, concerts and events, with the festival of Aarhus Festuge as the most popular and wide-ranging, along with large sports events. Aarhus Festuge is the largest multicultural festival in Scandinavia, always based on a special theme and takes place every year for ten days between late August and early September, transforming the inner city with festive activities and decorations of all kinds. There are numerous music festivals; the eight-day Aarhus Jazz Festival features jazz in many venues across the city. It was founded in 1988 and usually takes place in July every year, occasionally August or September. There are several annually recurring music festivals for contemporary popular music in Aarhus. NorthSide Festival presents well-known bands every year in mid-June on large outdoor scenes. It is a relatively new event, founded in 2010, but grew from a one-day event to a three-day festival in its first three years, now with 35,000 paying guests in 2015. Spot festival is aiming to showcase up-and-coming Danish and Scandinavian talents at selected venues of the inner city. The outdoor Grøn Koncert music festival takes place every year in many cities across Denmark, including Aarhus. Danmarks grimmeste festival (lit. Denmark's ugliest Festival) is a small summer music festival held in Skjoldhøjkilen, Brabrand. Aarhus also hosts recurring events dedicated to specific art genres. International Living Theatre (ILT) is a bi-annual festival, established in 2009, with performing arts and stage art on a broad scale. The festival has a vision of showing the best plays and stage art experiences of the world, while at the same time attracting thespians and stage art interested people from both Aarhus and Europe at large. LiteratureXchange is a new annual festival from 2018, focused on literature from around the world as well as regional talents. The city actively promotes its gay and lesbian community and celebrates the annual Aarhus Pride gay pride festival while Aarhus Festuge usually includes exhibits, concerts and events designed for the LGBT communities. Notable events of a local scope include the university boat-race, held in the University Park since 1991, which has become a local spectator event attracting some 20,000 people. The boat race pits costumed teams from the university departments against each other in inflatable boats in a challenge to win the Gyldne Bækken (Golden Chamber Pot) trophy. The annual lighting of the Christmas lights on the Salling department store in Søndergade has also become an attraction in recent times, packing the pedestrianised city centre with thousands of revellers. Significant dates such as Saint Lucy's Day, Sankt Hans (Saint John's Eve) and Fastelavn are traditionally celebrated with numerous events across the city. Parks, nature, and recreation The beech forests of Riis Skov and Marselisborg occupy the hills along the coast to the north and south, and apart from the city centre, sandy beaches form the coastline of the entire municipality. There are two public sea baths, the northern Den Permanente below Riis Skov and close to the harbour area, and the southern Ballehage Beach in the Marselisborg Forests. As in most of Denmark, there are no private beaches in the municipality, but access to Den Permanente requires a membership, except in the summer. The relatively mild, temperate marine climate, allows for outdoor recreation year round, including walking, hiking, cycling, and outdoor team sports. Mountain biking is usually restricted to marked routes. Watersports like sailing, kayaking, motor boating, etc. are also popular, and since the bay rarely freezes up in winter, they can also be practised most of the year. Recreational and transportational pathways for pedestrians and cyclists, radiate from the city centre to the countryside, providing safety from motorised vehicles and a more tranquil experience. This includes the 19 kilometre long pathway of Brabrandstien, encircling the Brabrand Lake. The long-range hiking route Aarhus-Silkeborg, starts off from Brabrandstien. Aarhus has an unusually high number of parks and green spaces, 134 of them, covering a total area of around . The central Botanical Gardens (Botanisk Have) from 1875 are a popular destination, as they include The Old Town open-air museum and host a number of events throughout the year. Originally used to cultivate fruit trees and other useful plants for the local citizens, there are now a significant collection of trees and bushes from different habitats and regions of the world, including a section devoted to native Danish plants. Recently renovated tropical and subtropical greenhouses, exhibit exotic plants from throughout the world. Also in the city centre is the undulating University Park, recognised for its unique landscaped design with large old oak trees. The Memorial Park (Mindeparken) at the coast below Marselisborg Palace, offers a panoramic view across the Bay of Aarhus and is popular with locals for outings, picnics or events. Other notable parks include the small central City Hall Park (Rådhusparken) and Marienlyst Park (Marienlystparken). Marienlyst Park is a relatively new park from 1988, situated in Hasle out of the inner city and is less crowded, but it is the largest park in Aarhus, including woodlands, large open grasslands and soccer fields. Marselisborg Forests and Riis Skov, has a long history of recreational activities of all kinds, including several restaurants, hotels and opportunities for green exercise. There are marked routes here for jogging, running and mountain biking and large events are hosted regularly. This includes running events, cycle racing and orienteering, the annual Classic Race Aarhus with historic racing cars, all attracting thousands of people. Marselisborg Deer Park (Marselisborg Dyrehave) in Marselisborg Forests, comprises of fenced woodland pastures with free-roaming sika and roe deer. Below the Moesgård Museum in the southern parts of the Marselisborg Forests, is a large historical landscape of pastures and woodlands, presenting different eras of Denmark's prehistory. Sections of the forest comprise trees and vegetation representing specific climatic epochs from the last Ice Age to the present. Dotted across the landscape are reconstructed Stone Age and Bronze Age graves, buildings from the Iron Age, Viking Age and medieval times, with grazing goats, sheep and horses in between. Food, drink, and nightlife Aarhus has a large variety of restaurants and eateries offering food from cultures all over the world, especially Mediterranean and Asian, but also international gourmet cuisine, traditional Danish food and New Nordic Cuisine. Among the oldest restaurants are Rådhuscafeen (lit. The City Hall Café), opened in 1924, serving a menu of traditional Danish meals, and Peter Gift from 1906, a tavern with a broad beer selection and a menu of smørrebrød and other Danish dishes. In Aarhus, New Nordic can be experienced at Kähler Villa Dining, Hærværk and Domestic, but local produce can be had at many places, especially at the twice-weekly food markets in Frederiksbjerg. Aarhus and Central Denmark Region was selected as European Region of Gastronomy in 2017. The city (and municipality) is a member of the Délice Network, an international non-profit organization nurturing and facilitating knowledge exchange in gastronomy. Appraised high-end restaurants serving international gourmet cuisine include Frederikshøj, Substans, Gastromé, Det Glade Vanvid, Nordisk Spisehus, Restaurant Varna, Restaurant ET, Gäst, Brasserie Belli, Møf. Restaurants in Aarhus were the first in provincial Denmark to receive Michelin stars since 2015, when Michelin inspectors ventured outside Copenhagen for the first time. Vendors of street food are numerous throughout the centre, often selling from small trailers on permanent locations formally known as Pølsevogne (lit. sausage wagons), traditionally serving a Danish variety of hot dogs, sausages and other fast food. There are increasingly more outlets inspired by other cultural flavours such as sushi, kebab and currywurst. The city centre is packed with cafés, especially along the river and the Latin quarter. Some of them also include an evening restaurant, such as Café Casablanca, Café Carlton, Café Cross and Gyngen. Aarhus Street Food and Aarhus Central Food Market are two indoor food courts from 2016 in the city centre, comprising a variety of street food restaurants, cafés and bars. Aarhus has a robust and diverse nightlife. The action tends to concentrate in the inner city, with the pedestrianised riverside, Frederiksgade, the Latin Quarter, and Jægergårdsgade on Frederiksbjerg as the most active centres at night, but things are stirring elsewhere around the city too. The nightlife scene offers everything from small joints with cheap alcohol and a homely atmosphere to fashionable nightclubs serving champagne and cocktails or small and large music venues with bars, dance floors and lounges. A short selection of well-established places where you can have a drink and socialise, include the fashionable lounge and night club Kupé at the harbourfront, the relaxed Ris Ras Filliongongong offering waterpipes and an award-winning beer selection, Fatter Eskild with a broad selection of Danish bands playing mostly blues and rock, the wine and book café Løve's in Nørregade, Sherlock Holmes, a British-style pub with live music, and the brew pub of Sct. Clemens, with A Hereford Beefstouw restaurant across the cathedral. A few nightlife spots are aimed at gays and lesbians specifically, including Gbar (nightclub) and Café Sappho. The Århus Set (Danish: Århus Sæt) is a set of drinks often ordered together, named for the city and consisting of two beverages, one Ceres Top beer and one shot Arnbitter, both originally from Aarhus. Ordering "a set" suffices in most bars and pubs. Aarhus Bryghus is a local craft brewery with a sizeable production. The brewery is located in the southern district of Viby and a large variety of their craft brews are available there, in most larger well-assorted stores in the city, and in some bars and restaurants as well. They also export. Local dialect The Aarhus dialect, commonly called Aarhusiansk (Aarhusian in English), is a Jutlandic dialect in the Mid-Eastern Jutland dialect area, traditionally spoken in and around Aarhus. Aarhusian, as with most local dialects in Denmark, has diminished in use through the 20th century and most Danes today speak some version of Standard Danish with slight regional features. Aarhusian, however, still has a strong presence in older segments of the population and in areas with high numbers of immigrants. Some examples of common, traditional and unique Aarhusian words are: træls ('tiresome'), noller ('silly' or 'dumb') and dælme (excl. 'damn me!'). The dialect is notable for single-syllable words ending in "d" being pronounced with stød while the same letter in multiple-syllable words is pronounced as "j", i.e., Odder is pronounced "Ojjer". Like other dialects in East Jutland, it has two grammatical genders, similar to Standard Danish, but different from West Jutlandic dialects, which have only one. In 2009, the University of Aarhus compiled a list of contemporary public figures who best exemplify the dialect, including Jacob Haugaard, Thomas Helmig, Steffen Brandt, Stig Tøfting, Flemming Jørgensen, Tina Dickow and Camilla Martin. In popular culture, the dialect features prominently in Niels Malmros's movie Aarhus by Night and in 90s comedy sketches by Jacob Haugaard and Finn Nørbygaard. Sports Aarhus has three major men's professional sports teams: the Superliga team Aarhus Gymnastikforening (AGF), Danish Handball League's Aarhus GF Håndbold, and Danish Basketball League's Bakken Bears. Notable or historic clubs include Aarhus 1900, Aarhus Fremad, Idrætsklubben Skovbakken and Aarhus Sejlklub. Aarhus Idrætspark has hosted matches in the premiere Danish soccer league since it was formed in 1920 and matches for the national men's soccer team in 2006 and 2007. The five sailing clubs routinely win national and international titles in a range of disciplines and the future national watersports stadium will be located on the Aarhus Docklands in the city centre. The Bakken Bears won the Danish basketball championships in 2011, 2012, 2013 and 2014. The municipality actively supports sports organisations in and around the city, providing public organisations that aim to attract major sporting events and strengthen professional sports. The National Olympic Committee and Sports Confederation of Denmark counts some 380 sports organisations within the municipality and about one third of the population are members of one. Soccer is by far the most popular sport followed by Gymnastics, Handball and Badminton. In recent decades, many free and public sports facilities have sprung up across the city, such as street football, basketball, climbing walls, skateboarding and beach volley. Several natural sites also offer green exercise, with exercise equipment installed along the paths and tracks reserved for mountain biking. The newly reconstructed area of Skjoldhøjkilen is a prime example. Aarhus has hosted many sporting events including the 2010 European Women's Handball Championship, the 2014 European Men's Handball Championship, the 2013 Men's European Volleyball Championships, the 2005 European Table Tennis Championships, the Denmark Open in badminton, the UCI Women's Road Cycling World Cup, the 2006 World Orienteering Championships, the 2006 World Artistic Gymnastics Championships and the GF World Cup (women's handball). On average, Aarhus is hosting one or two international sailing competitions every year. In 2008, the city hosted the ISAF Youth Sailing World Championships and in 2018 it was host to the ISAF Sailing World Championships, the world championship for the 12 Olympic sailing disciplines. Aarhus is an important qualifier for the 2020 Olympics. Education Aarhus is the principal centre for education in the Jutland region. It draws students from a large area, especially from the western and southern parts of the peninsula. The relatively large influx of young people and students creates a natural base for cultural activities. Aarhus has the greatest concentration of students in Denmark, fully 12% of citizens attending short, medium or long courses of study. In addition to around 25 institutions of higher education, several research forums have evolved to assist in the transfer of expertise from education to business. The city is home to more than 52,000 students. Since 2012, Aarhus University (AU) has been the largest university in Denmark by number of students enrolled. It is ranked among the top 100 universities in the world by several of the most influential and respected rankings. The university has approximately 41,500 Bachelor and Master students enrolled as well as about 1,500 PhD students. It is possible to engage in higher academic studies in many areas, from the traditional spheres of natural science, humanities and theology to more vocational academic areas like engineering and dentistry. Aarhus Tech is one of the largest technical colleges in Denmark, teaching undergraduate study programmes in English, including vocational education and training (VET), continuing vocational training (CVT), and human resource development. Business Academy Aarhus is among the largest business academies in Denmark and offers undergraduate and some academic degrees, in IT, business and technical fields. The academic level technical aspects are covered in a collaboration with Aarhus Tech, Aarhus School of Marine and Technical Engineering and Aarhus Educational Centre for Agriculture. The Danish School of Media and Journalism (DMJX) is the oldest and largest of the colleges, offering journalism courses since 1946, with approximately 1,700 students as of 2014. DMJX has been an independent institution since 1974, conducting research and teaching at undergraduate level, and in 2004, master's courses in journalism was established in a collaboration with Aarhus University. The latter is offered through the Centre for University studies in journalism, granting degrees through the university. The Royal Academy of Music in Aarhus (Det Jyske Musikkonservatorium) is a conservatoire, established under the auspices of the Danish Ministry of Culture in 1927. In 2010, it merged administratively with the Royal Academy of Music in Aalborg, which was founded in 1930. Under the patronage of His Royal Highness Crown Prince Frederik, it offers graduate level studies in areas such as music teaching, and solo and professional musicianship. VIA University College was established in January 2008 and is one of eight new regional organisations offering bachelor courses of all kinds, throughout the Central Denmark Region. It offers over 50 higher educations, taught in Danish or sometimes in English, with vocational education and it participates in various research and development projects. Aarhus School of Architecture (Arkitektskolen Aarhus) was founded in 1965. Along with the Royal Danish Academy of Fine Arts of Copenhagen, it is responsible for the education of architects in Denmark. With an enrolment of approximately 900 students, it teaches in five main departments: architecture and aesthetics, urban and landscape, architectonic heritage, design and architectural design. Transport Aarhus has two ring roads; Ring 1, roughly encircling the central district of Aarhus C, and the outlying Ring 2. Six major intercity motorways radiate from the city centre, connecting with nearby cities Grenå, Randers, Viborg, Silkeborg, Skanderborg and Odder. In the inner city, motorised traffic is highly regulated, larger parts are pedestrianised and in the 2000s, a system of roads prioritised for cyclists have been implemented, connecting to suburban areas. The main railway station in Aarhus is Aarhus Central Station located in the city centre. DSB has connections to destinations throughout Denmark and also services to Flensburg and Hamburg in Germany. Aarhus Letbane is a local electric light rail or tram system that opened in December 2017, connecting the central station and the inner city with the University Hospital in Skejby and also replaced local railway services to Grenaa and Odder in late 2018. It is the first electric light rail system in Denmark and more routes are planned to open in coming years. Tickets for the light rail are also available in local yellow bus lines. Most city bus lines go through the inner city and pass through either Park Allé or Banegårdspladsen, or both, right at the central station. Regional and Inter-city buses terminate at Aarhus Bus Terminal, just east of the central station. FlixBus provides long-distance buses that travel to other cities in Denmark and Europe. Ferries administered by Danish ferry company Mols-Linien transports passengers and motorvehicles between Aarhus and Sjællands Odde on Zealand. The ferries comprises HSC KatExpress 1 and HSC KatExpress 2, the world's largest diesel-powered catamarans, and HSC Max Mols. Aarhus Airport is located on Djursland, north-east of Aarhus near Tirstrup, and provides links to both Copenhagen and international destinations. The larger Billund Airport is situated south-west of Aarhus. There has been much discussion about constructing a new airport closer to the city for many years, but so far no plans have been realised. In August 2014, the city council officially initiated a process to assert the viability of a new international airport. A small seaplane now operates four flights daily between Aarhus harbour and Copenhagen harbour. Aarhus has a free bike sharing system, Aarhus Bycykler (Aarhus City Bikes). The bicycles are available from 1 April to 30 October at 57 stands throughout the city and can be obtained by placing a DKK 20 coin in a release slot, like caddies in a supermarket. The coin can be retrieved when the bike is returned at a random stand. Bicycles can also be hired from many shops. Healthcare Aarhus is home to Aarhus University Hospital, one of six Danish "Super Hospitals" officially established in 2007 when the regions reformed the Danish healthcare sector. The university hospital is the result of a series of mergers in the 2000s between the local hospitals of Skejby Sygehus, the Municipal Hospital, the County Hospital, Marselisborg Hospital and Risskov Psychiatric Hospital. It is today the largest hospital in Denmark with a combined staff of some 10,000 and 1,150 patient beds, and has been ranked the best hospital in Denmark consecutively since 2008. In 2012, construction of a new large hospital building began, known as Det Nye Universitetshospital (DNU) or 'The New University Hospital' in English, and it is centralising and accommodating all of the former departments, ending in 2019. The new hospital is divided in four clinical centres, a service centre and one administrative unit along with twelve research centres. Private hospitals specialised in different areas from plastic surgery to fertility treatments operate in Aarhus as well. Ciconia Aarhus Private Hospital founded in 1984 is a leading Danish fertility clinic and the first of its kind in Denmark. Ciconia has provided for the birth of 6,000 children by artificial insemination and continually conducts research into the field of fertility. Aagaard Clinic, established in 2004, is another private fertility and gynaecology clinic which since 2004 has undertaken fertility treatments that has resulted in 1550 births. Aarhus Municipality also offers a number of specialised services in the areas of nutrition, exercise, sex, smoking and drinking, activities for the elderly, health courses and lifestyle. Media The first daily newspaper to appear in Aarhus was Århus Stiftstidende, established in 1794 as Aarhuus Stifts Adresse-Contoirs Tidender, with a moderately conservative approach. Once one of Denmark's largest, it was a leading provincial newspaper for a time, but after the Second World War it increasingly faced competition from Demokraten (1884–1974) and , both published in Aarhus. In 1998, it merged with Randers Amtsavis and is now run by Midtjyske Medier, part of Berlingske Media. The daily newspaper of was established in 1871 in Aarhus, and takes a generally right-wing editorial approach. With a reputation as a serious news publication, the paper has always included news from Jutland in particular, but somewhat less so since its promotion as a national newspaper in the 1960s. Today it is one of the three bestselling serious newspapers in Denmark, the others being Berlingske and Politiken. Jyllands-Posten publishes JP Aarhus, a section dedicated to news in and around Aarhus, and hosted a free cityguide website from 2010 to 2016. The Copenhagen-based media company of Politiken, also publishes several free local papers once a week in parts of Denmark and Sweden. In Aarhus, they publish a total of five local newspapers; Aarhus Midt, Aarhus Nord, Aarhus Vest, Aarhus Syd and Aarhus Onsdag. Aarhus Onsdag (Aarhus Wednesday) is financed completely by advertisements and available in both paperform and online. It was bought from Århus Stiftstidende in June 2017, but has been published for many years previous. Danmarks Radio has a large department in Aarhus with over 200 employees. It runs the DR Østjylland radio programme, provides local contributions to DR P4, and produces local regional television programmes. In 1999, TV 2 moved its Jutland headquarters from Randers to Skejby in northern Aarhus. The station broadcasts regional news and current affairs television and radio programmes. Since 2012, it has run its own TV channel, TV 2 Østjylland. Aarhus has its own local TV channel TVAarhus, transmitting since 1984. After an agreement on 1 July 2014, TVAarhus can be watched by 130,000 households in Aarhus, making it the largest cable-transmitted local TV channel in Denmark. With over 1,700 students, the Danish School of Media and Journalism (Danmarks Medie- og Journalisthøjskole) is the country's largest and oldest school of journalism. The school works closely with Aarhus University, where the first journalism course was established in 1946. In 2004, the two institutions established the Centre for University Studies in Journalism, which offers master's courses. International relations Aarhus is home to 32 consulates: Aarhus practices twinning on the municipal level. For the twin towns, see twin towns of Aarhus Municipality. Notable people Citations Notes References Publications Further reading External links Aarhus Kommune Official municipal and city portal Visit Aarhus Official tourist site Cities and towns in the Central Denmark Region Cities and towns in Aarhus Municipality Municipal seats of the Central Denmark Region Municipal seats of Denmark Port cities and towns in Denmark Viking Age populated places

1063

https://en.wikipedia.org/wiki/Algorithms%20for%20calculating%20variance

Algorithms for calculating variance

Algorithms for calculating variance play a major role in computational statistics. A key difficulty in the design of good algorithms for this problem is that formulas for the variance may involve sums of squares, which can lead to numerical instability as well as to arithmetic overflow when dealing with large values. Naïve algorithm A formula for calculating the variance of an entire population of size N is: Using Bessel's correction to calculate an unbiased estimate of the population variance from a finite sample of n observations, the formula is: Therefore, a naïve algorithm to calculate the estimated variance is given by the following: Let For each datum : This algorithm can easily be adapted to compute the variance of a finite population: simply divide by n instead of n − 1 on the last line. Because and can be very similar numbers, cancellation can lead to the precision of the result to be much less than the inherent precision of the floating-point arithmetic used to perform the computation. Thus this algorithm should not be used in practice, and several alternate, numerically stable, algorithms have been proposed. This is particularly bad if the standard deviation is small relative to the mean. Computing shifted data The variance is invariant with respect to changes in a location parameter, a property which can be used to avoid the catastrophic cancellation in this formula. with any constant, which leads to the new formula the closer is to the mean value the more accurate the result will be, but just choosing a value inside the samples range will guarantee the desired stability. If the values are small then there are no problems with the sum of its squares, on the contrary, if they are large it necessarily means that the variance is large as well. In any case the second term in the formula is always smaller than the first one therefore no cancellation may occur. If just the first sample is taken as the algorithm can be written in Python programming language as def shifted_data_variance(data): if len(data) < 2: return 0.0 K = data[0] n = Ex = Ex2 = 0.0 for x in data: n += 1 Ex += x - K Ex2 += (x - K) ** 2 variance = (Ex2 - Ex**2 / n) / (n - 1) # use n instead of (n-1) if want to compute the exact variance of the given data # use (n-1) if data are samples of a larger population return variance This formula also facilitates the incremental computation that can be expressed as K = Ex = Ex2 = 0.0 n = 0 def add_variable(x): global K, n, Ex, Ex2 if n == 0: K = x n += 1 Ex += x - K Ex2 += (x - K) ** 2 def remove_variable(x): global K, n, Ex, Ex2 n -= 1 Ex -= x - K Ex2 -= (x - K) ** 2 def get_mean(): global K, n, Ex return K + Ex / n def get_variance(): global n, Ex, Ex2 return (Ex2 - Ex**2 / n) / (n - 1) Two-pass algorithm An alternative approach, using a different formula for the variance, first computes the sample mean, and then computes the sum of the squares of the differences from the mean, where s is the standard deviation. This is given by the following code: def two_pass_variance(data): n = len(data) mean = sum(data) / n variance = sum([(x - mean) ** 2 for x in data]) / (n - 1) return variance This algorithm is numerically stable if n is small. However, the results of both of these simple algorithms ("naïve" and "two-pass") can depend inordinately on the ordering of the data and can give poor results for very large data sets due to repeated roundoff error in the accumulation of the sums. Techniques such as compensated summation can be used to combat this error to a degree. Welford's online algorithm It is often useful to be able to compute the variance in a single pass, inspecting each value only once; for example, when the data is being collected without enough storage to keep all the values, or when costs of memory access dominate those of computation. For such an online algorithm, a recurrence relation is required between quantities from which the required statistics can be calculated in a numerically stable fashion. The following formulas can be used to update the mean and (estimated) variance of the sequence, for an additional element xn. Here, denotes the sample mean of the first n samples , their biased sample variance, and their unbiased sample variance. These formulas suffer from numerical instability , as they repeatedly subtract a small number from a big number which scales with n. A better quantity for updating is the sum of squares of differences from the current mean, , here denoted : This algorithm was found by Welford, and it has been thoroughly analyzed. It is also common to denote and . An example Python implementation for Welford's algorithm is given below. # For a new value new_value, compute the new count, new mean, the new M2. # mean accumulates the mean of the entire dataset # M2 aggregates the squared distance from the mean # count aggregates the number of samples seen so far def update(existing_aggregate, new_value): (count, mean, M2) = existing_aggregate count += 1 delta = new_value - mean mean += delta / count delta2 = new_value - mean M2 += delta * delta2 return (count, mean, M2) # Retrieve the mean, variance and sample variance from an aggregate def finalize(existing_aggregate): (count, mean, M2) = existing_aggregate if count < 2: return float("nan") else: (mean, variance, sample_variance) = (mean, M2 / count, M2 / (count - 1)) return (mean, variance, sample_variance) This algorithm is much less prone to loss of precision due to catastrophic cancellation, but might not be as efficient because of the division operation inside the loop. For a particularly robust two-pass algorithm for computing the variance, one can first compute and subtract an estimate of the mean, and then use this algorithm on the residuals. The parallel algorithm below illustrates how to merge multiple sets of statistics calculated online. Weighted incremental algorithm The algorithm can be extended to handle unequal sample weights, replacing the simple counter n with the sum of weights seen so far. West (1979) suggests this incremental algorithm: def weighted_incremental_variance(data_weight_pairs): w_sum = w_sum2 = mean = S = 0 for x, w in data_weight_pairs: w_sum = w_sum + w w_sum2 = w_sum2 + w**2 mean_old = mean mean = mean_old + (w / w_sum) * (x - mean_old) S = S + w * (x - mean_old) * (x - mean) population_variance = S / w_sum # Bessel's correction for weighted samples # Frequency weights sample_frequency_variance = S / (w_sum - 1) # Reliability weights sample_reliability_variance = S / (w_sum - w_sum2 / w_sum) Parallel algorithm Chan et al. note that Welford's online algorithm detailed above is a special case of an algorithm that works for combining arbitrary sets and : . This may be useful when, for example, multiple processing units may be assigned to discrete parts of the input. Chan's method for estimating the mean is numerically unstable when and both are large, because the numerical error in is not scaled down in the way that it is in the case. In such cases, prefer . def parallel_variance(n_a, avg_a, M2_a, n_b, avg_b, M2_b): n = n_a + n_b delta = avg_b - avg_a M2 = M2_a + M2_b + delta**2 * n_a * n_b / n var_ab = M2 / (n - 1) return var_ab This can be generalized to allow parallelization with AVX, with GPUs, and computer clusters, and to covariance. Example Assume that all floating point operations use standard IEEE 754 double-precision arithmetic. Consider the sample (4, 7, 13, 16) from an infinite population. Based on this sample, the estimated population mean is 10, and the unbiased estimate of population variance is 30. Both the naïve algorithm and two-pass algorithm compute these values correctly. Next consider the sample (, , , ), which gives rise to the same estimated variance as the first sample. The two-pass algorithm computes this variance estimate correctly, but the naïve algorithm returns 29.333333333333332 instead of 30. While this loss of precision may be tolerable and viewed as a minor flaw of the naïve algorithm, further increasing the offset makes the error catastrophic. Consider the sample (, , , ). Again the estimated population variance of 30 is computed correctly by the two-pass algorithm, but the naïve algorithm now computes it as −170.66666666666666. This is a serious problem with naïve algorithm and is due to catastrophic cancellation in the subtraction of two similar numbers at the final stage of the algorithm. Higher-order statistics Terriberry extends Chan's formulae to calculating the third and fourth central moments, needed for example when estimating skewness and kurtosis: Here the are again the sums of powers of differences from the mean , giving For the incremental case (i.e., ), this simplifies to: By preserving the value , only one division operation is needed and the higher-order statistics can thus be calculated for little incremental cost. An example of the online algorithm for kurtosis implemented as described is: def online_kurtosis(data): n = mean = M2 = M3 = M4 = 0 for x in data: n1 = n n = n + 1 delta = x - mean delta_n = delta / n delta_n2 = delta_n**2 term1 = delta * delta_n * n1 mean = mean + delta_n M4 = M4 + term1 * delta_n2 * (n**2 - 3*n + 3) + 6 * delta_n2 * M2 - 4 * delta_n * M3 M3 = M3 + term1 * delta_n * (n - 2) - 3 * delta_n * M2 M2 = M2 + term1 # Note, you may also calculate variance using M2, and skewness using M3 # Caution: If all the inputs are the same, M2 will be 0, resulting in a division by 0. kurtosis = (n * M4) / (M2**2) - 3 return kurtosis Pébaÿ further extends these results to arbitrary-order central moments, for the incremental and the pairwise cases, and subsequently Pébaÿ et al. for weighted and compound moments. One can also find there similar formulas for covariance. Choi and Sweetman offer two alternative methods to compute the skewness and kurtosis, each of which can save substantial computer memory requirements and CPU time in certain applications. The first approach is to compute the statistical moments by separating the data into bins and then computing the moments from the geometry of the resulting histogram, which effectively becomes a one-pass algorithm for higher moments. One benefit is that the statistical moment calculations can be carried out to arbitrary accuracy such that the computations can be tuned to the precision of, e.g., the data storage format or the original measurement hardware. A relative histogram of a random variable can be constructed in the conventional way: the range of potential values is divided into bins and the number of occurrences within each bin are counted and plotted such that the area of each rectangle equals the portion of the sample values within that bin: where and represent the frequency and the relative frequency at bin and is the total area of the histogram. After this normalization, the raw moments and central moments of can be calculated from the relative histogram: where the superscript indicates the moments are calculated from the histogram. For constant bin width these two expressions can be simplified using : The second approach from Choi and Sweetman is an analytical methodology to combine statistical moments from individual segments of a time-history such that the resulting overall moments are those of the complete time-history. This methodology could be used for parallel computation of statistical moments with subsequent combination of those moments, or for combination of statistical moments computed at sequential times. If sets of statistical moments are known: for , then each can be expressed in terms of the equivalent raw moments: where is generally taken to be the duration of the time-history, or the number of points if is constant. The benefit of expressing the statistical moments in terms of is that the sets can be combined by addition, and there is no upper limit on the value of . where the subscript represents the concatenated time-history or combined . These combined values of can then be inversely transformed into raw moments representing the complete concatenated time-history Known relationships between the raw moments () and the central moments () are then used to compute the central moments of the concatenated time-history. Finally, the statistical moments of the concatenated history are computed from the central moments: Covariance Very similar algorithms can be used to compute the covariance. Naïve algorithm The naïve algorithm is For the algorithm above, one could use the following Python code: def naive_covariance(data1, data2): n = len(data1) sum1 = sum(data1) sum2 = sum(data2) sum12 = sum([i1 * i2 for i1, i2 in zip(data1, data2)]) covariance = (sum12 - sum1 * sum2 / n) / n return covariance With estimate of the mean As for the variance, the covariance of two random variables is also shift-invariant, so given any two constant values and it can be written: and again choosing a value inside the range of values will stabilize the formula against catastrophic cancellation as well as make it more robust against big sums. Taking the first value of each data set, the algorithm can be written as: def shifted_data_covariance(data_x, data_y): n = len(data_x) if n < 2: return 0 kx = data_x[0] ky = data_y[0] Ex = Ey = Exy = 0 for ix, iy in zip(data_x, data_y): Ex += ix - kx Ey += iy - ky Exy += (ix - kx) * (iy - ky) return (Exy - Ex * Ey / n) / n Two-pass The two-pass algorithm first computes the sample means, and then the covariance: The two-pass algorithm may be written as: def two_pass_covariance(data1, data2): n = len(data1) mean1 = sum(data1) / n mean2 = sum(data2) / n covariance = 0 for i1, i2 in zip(data1, data2): a = i1 - mean1 b = i2 - mean2 covariance += a * b / n return covariance A slightly more accurate compensated version performs the full naive algorithm on the residuals. The final sums and should be zero, but the second pass compensates for any small error. Online A stable one-pass algorithm exists, similar to the online algorithm for computing the variance, that computes co-moment : The apparent asymmetry in that last equation is due to the fact that , so both update terms are equal to . Even greater accuracy can be achieved by first computing the means, then using the stable one-pass algorithm on the residuals. Thus the covariance can be computed as def online_covariance(data1, data2): meanx = meany = C = n = 0 for x, y in zip(data1, data2): n += 1 dx = x - meanx meanx += dx / n meany += (y - meany) / n C += dx * (y - meany) population_covar = C / n # Bessel's correction for sample variance sample_covar = C / (n - 1) A small modification can also be made to compute the weighted covariance: def online_weighted_covariance(data1, data2, data3): meanx = meany = 0 wsum = wsum2 = 0 C = 0 for x, y, w in zip(data1, data2, data3): wsum += w wsum2 += w * w dx = x - meanx meanx += (w / wsum) * dx meany += (w / wsum) * (y - meany) C += w * dx * (y - meany) population_covar = C / wsum # Bessel's correction for sample variance # Frequency weights sample_frequency_covar = C / (wsum - 1) # Reliability weights sample_reliability_covar = C / (wsum - wsum2 / wsum) Likewise, there is a formula for combining the covariances of two sets that can be used to parallelize the computation: Weighted batched version A version of the weighted online algorithm that does batched updated also exists: let denote the weights, and write The covariance can then be computed as See also Kahan summation algorithm Squared deviations from the mean Yamartino method References External links Statistical algorithms Statistical deviation and dispersion Articles with example pseudocode Articles with example Python (programming language) code

1078

https://en.wikipedia.org/wiki/Antisemitism

Antisemitism

Antisemitism (also spelled anti-semitism or anti-Semitism) is hostility to, prejudice towards, or discrimination against Jews. This sentiment is a form of racism, and a person who harbours it is called an antisemite. Though antisemitism is overwhelmingly perpetrated by non-Jews, it may occasionally be perpetrated by Jews in a phenomenon known as auto-antisemitism (i.e., self-hating Jews). Primarily, antisemitic tendencies may be motivated by negative sentiment towards Jews as a people or by negative sentiment towards Jews with regard to Judaism. In the former case, usually presented as racial antisemitism, a person's hostility is driven by the belief that Jews constitute a distinct race with inherent traits or characteristics that are repulsive or inferior to the preferred traits or characteristics within that person's society. In the latter case, known as religious antisemitism, a person's hostility is driven by their religion's perception of Jews and Judaism, typically encompassing doctrines of supersession that expect or demand Jews to turn away from Judaism and submit to the religion presenting itself as Judaism's successor faith — this is a common theme within the other Abrahamic religions. The development of racial and religious antisemitism has historically been encouraged by anti-Judaism, though the concept itself is distinct from antisemitism. There are various ways in which antisemitism is manifested, ranging in the level of severity of Jewish persecution. On the more subtle end, it consists of expressions of hatred or discrimination against individual Jews, and may or may not be accompanied by violence. On the most extreme end, it consists of pogroms or genocide, which may or may not be state-sponsored. Although the term "antisemitism" did not come into common usage until the 19th century, it is also applied to previous and later anti-Jewish incidents. Notable instances of antisemitic persecution include the Rhineland massacres in 1096; the Edict of Expulsion in 1290; the European persecution of Jews during the Black Death, between 1348 and 1351; the massacre of Spanish Jews in 1391, the crackdown of the Spanish Inquisition, and the expulsion of Jews from Spain in 1492; the Cossack massacres in Ukraine, between 1648 and 1657; various anti-Jewish pogroms in the Russian Empire, between 1821 and 1906; the Dreyfus affair, between 1894 and 1906; the Holocaust by the Axis powers during World War II; and various Soviet anti-Jewish policies. Historically, most of the world's violent antisemitic events have taken place in Christian Europe. However, since the early 20th century, there has been a sharp rise in antisemitic incidents across the Arab world, largely due to the surge in Arab antisemitic conspiracy theories, which have been cultivated to an extent under the aegis of European antisemitic conspiracy theories. In the contemporary era, a manifestation known as "new antisemitism" was identified. This concept addresses the exploitation of the Arab–Israeli conflict by a large number of concealed antisemites, who may attempt to gain traction or legitimacy for their antisemitic hoaxes by portraying themselves as criticizing the Israeli government's actions; this is distinct from people who view Israeli government policies negatively, which is not inherently antisemitic. Likewise, as the State of Israel has a Jewish-majority population, it is common for antisemitic rhetoric to be manifested in expressions of sentiments against the form or existence of Israel as a state, or sentiments against the need or right to a state for Jewish people (Anti-Zionism), particularly around Jerusalem, though this is not always the case and such expressions may sometimes be part of wider anti–Middle Eastern sentiment without an exclusively antisemitic motive. Due to the root word Semite, the term is prone to being invoked as a misnomer by those who interpret it as referring to racist hatred directed at all "Semitic people" (i.e., those who speak Semitic languages, such as Arabs, Assyrians, and Arameans). This usage is erroneous; the compound word () was first used in print in Germany in 1879 as a "scientific-sounding term" for (), and it has since been used to refer to anti-Jewish sentiment alone. Origin and usage Etymology The origin of "antisemitic" terminologies is found in the responses of Moritz Steinschneider to the views of Ernest Renan. As Alex Bein writes: "The compound anti-Semitism appears to have been used first by Steinschneider, who challenged Renan on account of his 'anti-Semitic prejudices' [i.e., his derogation of the "Semites" as a race]." Avner Falk similarly writes: "The German word was first used in 1860 by the Austrian Jewish scholar Moritz Steinschneider (1816–1907) in the phrase antisemitische Vorurteile (antisemitic prejudices). Steinschneider used this phrase to characterise the French philosopher Ernest Renan's false ideas about how 'Semitic races' were inferior to 'Aryan races. Pseudoscientific theories concerning race, civilization, and "progress" had become quite widespread in Europe in the second half of the 19th century, especially as Prussian nationalistic historian Heinrich von Treitschke did much to promote this form of racism. He coined the phrase "the Jews are our misfortune" which would later be widely used by Nazis. According to Avner Falk, Treitschke uses the term "Semitic" almost synonymously with "Jewish", in contrast to Renan's use of it to refer to a whole range of peoples, based generally on linguistic criteria. According to Jonathan M. Hess, the term was originally used by its authors to "stress the radical difference between their own 'antisemitism' and earlier forms of antagonism toward Jews and Judaism." In 1879, German journalist Wilhelm Marr published a pamphlet, (The Victory of the Jewish Spirit over the Germanic Spirit. Observed from a non-religious perspective) in which he used the word Semitismus interchangeably with the word Judentum to denote both "Jewry" (the Jews as a collective) and "Jewishness" (the quality of being Jewish, or the Jewish spirit). This use of Semitismus was followed by a coining of "Antisemitismus" which was used to indicate opposition to the Jews as a people and opposition to the Jewish spirit, which Marr interpreted as infiltrating German culture. His next pamphlet, (The Way to Victory of the Germanic Spirit over the Jewish Spirit, 1880), presents a development of Marr's ideas further and may present the first published use of the German word , "antisemitism". The pamphlet became very popular, and in the same year Marr founded the Antisemiten-Liga (League of Antisemites), apparently named to follow the "Anti-Kanzler-Liga" (Anti-Chancellor League). The league was the first German organization committed specifically to combating the alleged threat to Germany and German culture posed by the Jews and their influence and advocating their forced removal from the country. So far as can be ascertained, the word was first widely printed in 1881, when Marr published Zwanglose Antisemitische Hefte, and Wilhelm Scherer used the term Antisemiten in the January issue of Neue Freie Presse. The Jewish Encyclopedia reports, "In February 1881, a correspondent of the Allgemeine Zeitung des Judentums speaks of 'Anti-Semitism' as a designation which recently came into use ("Allg. Zeit. d. Jud." 1881, p. 138). On 19 July 1882, the editor says, 'This quite recent Anti-Semitism is hardly three years old. The word "antisemitism" was borrowed into English from German in 1881. Oxford English Dictionary editor James Murray wrote that it was not included in the first edition because "Anti-Semite and its family were then probably very new in English use, and not thought likely to be more than passing nonce-words... Would that anti-Semitism had had no more than a fleeting interest!" The related term "philosemitism" was used by 1881. Usage From the outset the term "anti-Semitism" bore special racial connotations and meant specifically prejudice against Jews. The term is confusing, for in modern usage 'Semitic' designates a language group, not a race. In this sense, the term is a misnomer, since there are many speakers of Semitic languages (e.g., Arabs, Ethiopians, and Arameans) who are not the objects of antisemitic prejudices, while there are many Jews who do not speak Hebrew, a Semitic language. Though 'antisemitism' could be construed as prejudice against people who speak other Semitic languages, this is not how the term is commonly used. The term may be spelled with or without a hyphen (antisemitism or anti-Semitism). Many scholars and institutions favor the unhyphenated form. Shmuel Almog argued, "If you use the hyphenated form, you consider the words 'Semitism', 'Semite', 'Semitic' as meaningful ... [I]n antisemitic parlance, 'Semites' really stands for Jews, just that." Emil Fackenheim supported the unhyphenated spelling, in order to "[dispel] the notion that there is an entity 'Semitism' which 'anti-Semitism' opposes." Others endorsing an unhyphenated term for the same reason include the International Holocaust Remembrance Alliance, historian Deborah Lipstadt, Padraic O'Hare, professor of Religious and Theological Studies and Director of the Center for the Study of Jewish-Christian-Muslim Relations at Merrimack College; and historians Yehuda Bauer and James Carroll. According to Carroll, who first cites O'Hare and Bauer on "the existence of something called 'Semitism, "the hyphenated word thus reflects the bipolarity that is at the heart of the problem of antisemitism". The Associated Press and its accompanying AP Stylebook adopted the unhyphenated spelling in 2021. Style guides for other news organizations such as the New York Times and Wall Street Journal later adopted this spelling as well. It has also been adopted by many Holocaust museums, such as the United States Holocaust Memorial Museum and Yad Vashem. Definition Though the general definition of antisemitism is hostility or prejudice against Jews, and, according to Olaf Blaschke, has become an "umbrella term for negative stereotypes about Jews", a number of authorities have developed more formal definitions. Holocaust scholar and City University of New York professor Helen Fein defines it as "a persisting latent structure of hostile beliefs towards Jews as a collective manifested in individuals as attitudes, and in culture as myth, ideology, folklore and imagery, and in actions—social or legal discrimination, political mobilization against the Jews, and collective or state violence—which results in and/or is designed to distance, displace, or destroy Jews as Jews." Elaborating on Fein's definition, Dietz Bering of the University of Cologne writes that, to antisemites, "Jews are not only partially but totally bad by nature, that is, their bad traits are incorrigible. Because of this bad nature: (1) Jews have to be seen not as individuals but as a collective. (2) Jews remain essentially alien in the surrounding societies. (3) Jews bring disaster on their 'host societies' or on the whole world, they are doing it secretly, therefore the anti-Semites feel obliged to unmask the conspiratorial, bad Jewish character." For Sonja Weinberg, as distinct from economic and religious anti-Judaism, antisemitism in its modern form shows conceptual innovation, a resort to 'science' to defend itself, new functional forms, and organisational differences. It was anti-liberal, racialist and nationalist. It promoted the myth that Jews conspired to 'judaise' the world; it served to consolidate social identity; it channeled dissatisfactions among victims of the capitalist system; and it was used as a conservative cultural code to fight emancipation and liberalism. Bernard Lewis defined antisemitism as a special case of prejudice, hatred, or persecution directed against people who are in some way different from the rest. According to Lewis, antisemitism is marked by two distinct features: Jews are judged according to a standard different from that applied to others, and they are accused of "cosmic evil." Thus, "it is perfectly possible to hate and even to persecute Jews without necessarily being anti-Semitic" unless this hatred or persecution displays one of the two features specific to antisemitism. There have been a number of efforts by international and governmental bodies to define antisemitism formally. The United States Department of State states that "while there is no universally accepted definition, there is a generally clear understanding of what the term encompasses." For the purposes of its 2005 Report on Global Anti-Semitism, the term was considered to mean "hatred toward Jews—individually and as a group—that can be attributed to the Jewish religion and/or ethnicity." In 2005, the European Monitoring Centre on Racism and Xenophobia (now the Fundamental Rights Agency), then an agency of the European Union, developed a more detailed working definition, which states: "Antisemitism is a certain perception of Jews, which may be expressed as hatred toward Jews. Rhetorical and physical manifestations of antisemitism are directed toward Jewish or non-Jewish individuals and/or their property, toward Jewish community institutions and religious facilities." It also adds that "such manifestations could also target the state of Israel, conceived as a Jewish collectivity," but that "criticism of Israel similar to that leveled against any other country cannot be regarded as antisemitic." It provides contemporary examples of ways in which antisemitism may manifest itself, including promoting the harming of Jews in the name of an ideology or religion; promoting negative stereotypes of Jews; holding Jews collectively responsible for the actions of an individual Jewish person or group; denying the Holocaust or accusing Jews or Israel of exaggerating it; and accusing Jews of dual loyalty or a greater allegiance to Israel than their own country. It also lists ways in which attacking Israel could be antisemitic, and states that denying the Jewish people their right to self-determination, e.g. by claiming that the existence of a state of Israel is a racist endeavor, can be a manifestation of antisemitism—as can applying double standards by requiring of Israel a behavior not expected or demanded of any other democratic nation, or holding Jews collectively responsible for the actions of the State of Israel. The definition wrong and negative perception of people with Jewish descent has been adopted by the European Parliament Working Group on Antisemitism, in 2010, a similar definition that avoided using the word wrong was adopted by the United States Department of State, in 2014, that definition was adopted in the Operational Hate Crime Guidance of the UK College of Policing and was also adopted by the Campaign Against Antisemitism. In 2016, the U.S. State Department definition was adopted by the International Holocaust Remembrance Alliance. The Working Definition of Antisemitism is among the most controversial documents related to opposition to antisemitism, and critics argue that it has been used to censor criticism of Israel. Evolution of usage In 1879, Wilhelm Marr founded the Antisemiten-Liga (Anti-Semitic League). Identification with antisemitism and as an antisemite was politically advantageous in Europe during the late 19th century. For example, Karl Lueger, the popular mayor of fin de siècle Vienna, skillfully exploited antisemitism as a way of channeling public discontent to his political advantage. In its 1910 obituary of Lueger, The New York Times notes that Lueger was "Chairman of the Christian Social Union of the Parliament and of the Anti-Semitic Union of the Diet of Lower Austria. In 1895, A. C. Cuza organized the Alliance Anti-semitique Universelle in Bucharest. In the period before World War II, when animosity towards Jews was far more commonplace, it was not uncommon for a person, an organization, or a political party to self-identify as an antisemite or antisemitic. The early Zionist pioneer Leon Pinsker, a professional physician, preferred the clinical-sounding term Judeophobia to antisemitism, which he regarded as a misnomer. The word Judeophobia first appeared in his pamphlet "Auto-Emancipation", published anonymously in German in September 1882, where it was described as an irrational fear or hatred of Jews. According to Pinsker, this irrational fear was an inherited predisposition. In the aftermath of the Kristallnacht pogrom in 1938, German propaganda minister Goebbels announced: "The German people is anti-Semitic. It has no desire to have its rights restricted or to be provoked in the future by parasites of the Jewish race." After 1945 victory of the Allies over Nazi Germany, and particularly after the full extent of the Nazi genocide against the Jews became known, the term antisemitism acquired pejorative connotations. This marked a full circle shift in usage, from an era just decades earlier when "Jew" was used as a pejorative term. Yehuda Bauer wrote in 1984: "There are no anti-Semites in the world ... Nobody says, 'I am anti-Semitic.' You cannot, after Hitler. The word has gone out of fashion." Eternalism–contextualism debate The study of antisemitism has become politically controversial because of differing interpretations of the Holocaust and the Israeli–Palestinian conflict. There are two competing views of antisemitism, eternalism, and contextualism. The eternalist view sees antisemitism as separate from other forms of racism and prejudice and an exceptionalist, transhistorical force teleologically culminating in the Holocaust. Hannah Arendt criticized this approach, writing that it provoked "the uncomfortable question: 'Why the Jews of all people?' ... with the question begging reply: Eternal hostility." Zionist thinkers and antisemites draw different conclusions from what they perceive as the eternal hatred of Jews; according to antisemites, it proves the inferiority of Jews, while for Zionists it means that Jews need their own state as a refuge. Most Zionists do not believe that antisemitism can be combatted with education or other means. The contextual approach treats antisemitism as a type of racism and focuses on the historical context in which hatred of Jews emerges. Some contextualists restrict the use of "antisemitism" to refer exclusively to the era of modern racism, treating anti-Judaism as a separate phenomenon. Historian David Engel has challenged the project to define antisemitism, arguing that it essentializes Jewish history as one of persecution and discrimination. Engel argues that the term "antisemitism" is not useful in historical analysis because it implies that there are links between anti-Jewish prejudices expressed in different contexts, without evidence of such a connection. Manifestations Antisemitism manifests itself in a variety of ways. René König mentions social antisemitism, economic antisemitism, religious antisemitism, and political antisemitism as examples. König points out that these different forms demonstrate that the "origins of anti-Semitic prejudices are rooted in different historical periods." König asserts that differences in the chronology of different antisemitic prejudices and the irregular distribution of such prejudices over different segments of the population create "serious difficulties in the definition of the different kinds of anti-Semitism." These difficulties may contribute to the existence of different taxonomies that have been developed to categorize the forms of antisemitism. The forms identified are substantially the same; it is primarily the number of forms and their definitions that differ. Bernard Lazare identifies three forms of antisemitism: Christian antisemitism, economic antisemitism, and ethnologic antisemitism. William Brustein names four categories: religious, racial, economic, and political. The Roman Catholic historian Edward Flannery distinguished four varieties of antisemitism: Political and economic antisemitism, giving as examples Cicero and Charles Lindbergh; Theological or religious antisemitism, also called "traditional antisemitism" and sometimes known as anti-Judaism; Nationalistic antisemitism, citing Voltaire and other Enlightenment thinkers, who attacked Jews for supposedly having certain characteristics, such as greed and arrogance, and for observing customs such as kashrut and Shabbat; Racial antisemitism, with its extreme form resulting in the Holocaust by the Nazis. Louis Harap separates "economic antisemitism" and merges "political" and "nationalistic" antisemitism into "ideological antisemitism". Harap also adds a category of "social antisemitism". Religious (Jew as Christ-killer), Economic (Jew as banker, usurer, money-obsessed), Social (Jew as social inferior, "pushy", vulgar, therefore excluded from personal contact), Racist (Jews as an inferior "race"), Ideological (Jews regarded as subversive or revolutionary), Cultural (Jews regarded as undermining the moral and structural fiber of civilization). Cultural antisemitism Louis Harap defines cultural antisemitism as "that species of anti-Semitism that charges the Jews with corrupting a given culture and attempting to supplant or succeeding in supplanting the preferred culture with a uniform, crude, "Jewish" culture." Similarly, Eric Kandel characterizes cultural antisemitism as being based on the idea of "Jewishness" as a "religious or cultural tradition that is acquired through learning, through distinctive traditions and education." According to Kandel, this form of antisemitism views Jews as possessing "unattractive psychological and social characteristics that are acquired through acculturation." Niewyk and Nicosia characterize cultural antisemitism as focusing on and condemning "the Jews' aloofness from the societies in which they live." An important feature of cultural antisemitism is that it considers the negative attributes of Judaism to be redeemable by education or by religious conversion. Religious antisemitism Religious antisemitism, also known as anti-Judaism, is antipathy towards Jews because of their perceived religious beliefs. In theory, antisemitism and attacks against individual Jews would stop if Jews stopped practicing Judaism or changed their public faith, especially by conversion to the official or right religion. However, in some cases, discrimination continues after conversion, as in the case of Marranos (Christianized Jews in Spain and Portugal) in the late 15th century and 16th century, who were suspected of secretly practising Judaism or Jewish customs. Although the origins of antisemitism are rooted in the Judeo-Christian conflict, other forms of antisemitism have developed in modern times. Frederick Schweitzer asserts that "most scholars ignore the Christian foundation on which the modern antisemitic edifice rests and invoke political antisemitism, cultural antisemitism, racism or racial antisemitism, economic antisemitism, and the like." William Nichols draws a distinction between religious antisemitism and modern antisemitism based on racial or ethnic grounds: "The dividing line was the possibility of effective conversion [...] a Jew ceased to be a Jew upon baptism." From the perspective of racial antisemitism, however, "the assimilated Jew was still a Jew, even after baptism.[...] From the Enlightenment onward, it is no longer possible to draw clear lines of distinction between religious and racial forms of hostility towards Jews[...] Once Jews have been emancipated and secular thinking makes its appearance, without leaving behind the old Christian hostility towards Jews, the new term antisemitism becomes almost unavoidable, even before explicitly racist doctrines appear." Some Christians such as the Catholic priest Ernest Jouin, who published the first French translation of the Protocols, combined religious and racial antisemitism, as in his statement that "From the triple viewpoint of race, of nationality, and of religion, the Jew has become the enemy of humanity." The virulent antisemitism of Édouard Drumont, one of the most widely read Catholic writers in France during the Dreyfus Affair, likewise combined religious and racial antisemitism. Drumont founded the Antisemitic League of France. Economic antisemitism The underlying premise of economic antisemitism is that Jews perform harmful economic activities or that economic activities become harmful when they are performed by Jews. Linking Jews and money underpins the most damaging and lasting antisemitic canards. Antisemites claim that Jews control the world finances, a theory promoted in the fraudulent Protocols of the Elders of Zion, and later repeated by Henry Ford and his Dearborn Independent. In the modern era, such myths continue to be spread in books such as The Secret Relationship Between Blacks and Jews published by the Nation of Islam, and on the internet. Derek Penslar writes that there are two components to the financial canards: a) Jews are savages that "are temperamentally incapable of performing honest labor" b) Jews are "leaders of a financial cabal seeking world domination" Abraham Foxman describes six facets of the financial canards: All Jews are wealthy Jews are stingy and greedy Powerful Jews control the business world Jewish religion emphasizes profit and materialism It is okay for Jews to cheat non-Jews Jews use their power to benefit "their own kind" Gerald Krefetz summarizes the myth as "[Jews] control the banks, the money supply, the economy, and businesses—of the community, of the country, of the world". Krefetz gives, as illustrations, many slurs and proverbs (in several different languages) which suggest that Jews are stingy, or greedy, or miserly, or aggressive bargainers. During the nineteenth century, Jews were described as "scurrilous, stupid, and tight-fisted", but after the Jewish Emancipation and the rise of Jews to the middle- or upper-class in Europe were portrayed as "clever, devious, and manipulative financiers out to dominate [world finances]". Léon Poliakov asserts that economic antisemitism is not a distinct form of antisemitism, but merely a manifestation of theologic antisemitism (because, without the theological causes of economic antisemitism, there would be no economic antisemitism). In opposition to this view, Derek Penslar contends that in the modern era, economic antisemitism is "distinct and nearly constant" but theological antisemitism is "often subdued". An academic study by Francesco D'Acunto, Marcel Prokopczuk, and Michael Weber showed that people who live in areas of Germany that contain the most brutal history of antisemitic persecution are more likely to be distrustful of finance in general. Therefore, they tended to invest less money in the stock market and make poor financial decisions. The study concluded, "that the persecution of minorities reduces not only the long-term wealth of the persecuted but of the persecutors as well." Racial antisemitism Racial antisemitism is prejudice against Jews as a racial/ethnic group, rather than Judaism as a religion. Racial antisemitism is the idea that the Jews are a distinct and inferior race compared to their host nations. In the late 19th century and early 20th century, it gained mainstream acceptance as part of the eugenics movement, which categorized non-Europeans as inferior. It more specifically claimed that Northern Europeans, or "Aryans", were superior. Racial antisemites saw the Jews as part of a Semitic race and emphasized their non-European origins and culture. They saw Jews as beyond redemption even if they converted to the majority religion. Racial antisemitism replaced the hatred of Judaism with the hatred of Jews as a group. In the context of the Industrial Revolution, following the Jewish Emancipation, Jews rapidly urbanized and experienced a period of greater social mobility. With the decreasing role of religion in public life tempering religious antisemitism, a combination of growing nationalism, the rise of eugenics, and resentment at the socio-economic success of the Jews led to the newer, and more virulent, racist antisemitism. According to William Nichols, religious antisemitism may be distinguished from modern antisemitism based on racial or ethnic grounds. "The dividing line was the possibility of effective conversion... a Jew ceased to be a Jew upon baptism." However, with racial antisemitism, "Now the assimilated Jew was still a Jew, even after baptism... From the Enlightenment onward, it is no longer possible to draw clear lines of distinction between religious and racial forms of hostility towards Jews... Once Jews have been emancipated and secular thinking makes its appearance, without leaving behind the old Christian hostility towards Jews, the new term antisemitism becomes almost unavoidable, even before explicitly racist doctrines appear." In the early 19th century, a number of laws enabling the emancipation of the Jews were enacted in Western European countries. The old laws restricting them to ghettos, as well as the many laws that limited their property rights, rights of worship and occupation, were rescinded. Despite this, traditional discrimination and hostility to Jews on religious grounds persisted and was supplemented by racial antisemitism, encouraged by the work of racial theorists such as Joseph Arthur de Gobineau and particularly his Essay on the Inequality of the Human Race of 1853–1855. Nationalist agendas based on ethnicity, known as ethnonationalism, usually excluded the Jews from the national community as an alien race. Allied to this were theories of Social Darwinism, which stressed a putative conflict between higher and lower races of human beings. Such theories, usually posited by northern Europeans, advocated the superiority of white Aryans to Semitic Jews. Political antisemitism William Brustein defines political antisemitism as hostility toward Jews based on the belief that Jews seek national or world power. Yisrael Gutman characterizes political antisemitism as tending to "lay responsibility on the Jews for defeats and political economic crises" while seeking to "exploit opposition and resistance to Jewish influence as elements in political party platforms." Derek J. Penslar wrote, "Political antisemitism identified the Jews as responsible for all the anxiety-provoking social forces that characterized modernity." According to Viktor Karády, political antisemitism became widespread after the legal emancipation of the Jews and sought to reverse some of the consequences of that emancipation. Conspiracy theories Holocaust denial and Jewish conspiracy theories are also considered forms of antisemitism. Zoological conspiracy theories have been propagated by Arab media and Arabic language websites, alleging a "Zionist plot" behind the use of animals to attack civilians or to conduct espionage. New antisemitism Starting in the 1990s, some scholars have advanced the concept of new antisemitism, coming simultaneously from the left, the right, and radical Islam, which tends to focus on opposition to the creation of a Jewish homeland in the State of Israel, and they argue that the language of anti-Zionism and criticism of Israel are used to attack Jews more broadly. In this view, the proponents of the new concept believe that criticisms of Israel and Zionism are often disproportionate in degree and unique in kind, and they attribute this to antisemitism. Jewish scholar Gustavo Perednik posited in 2004 that anti-Zionism in itself represents a form of discrimination against Jews, in that it singles out Jewish national aspirations as an illegitimate and racist endeavor, and "proposes actions that would result in the death of millions of Jews". It is asserted that the new antisemitism deploys traditional antisemitic motifs, including older motifs such as the blood libel. Critics of the concept view it as trivializing the meaning of antisemitism, and as exploiting antisemitism in order to silence debate and to deflect attention from legitimate criticism of the State of Israel, and, by associating anti-Zionism with antisemitism, misusing it to taint anyone opposed to Israeli actions and policies. History Many authors see the roots of modern antisemitism in both pagan antiquity and early Christianity. Jerome Chanes identifies six stages in the historical development of antisemitism: Pre-Christian anti-Judaism in ancient Greece and Rome which was primarily ethnic in nature Christian antisemitism in antiquity and the Middle Ages which was religious in nature and has extended into modern times Traditional Muslim antisemitism which was—at least, in its classical form—nuanced in that Jews were a protected class Political, social and economic antisemitism of Enlightenment and post-Enlightenment Europe which laid the groundwork for racial antisemitism Racial antisemitism that arose in the 19th century and culminated in Nazism in the 20th century Contemporary antisemitism which has been labeled by some as the New Antisemitism Chanes suggests that these six stages could be merged into three categories: "ancient antisemitism, which was primarily ethnic in nature; Christian antisemitism, which was religious; and the racial antisemitism of the nineteenth and twentieth centuries." Ancient world The first clear examples of anti-Jewish sentiment can be traced to the 3rd century BCE to Alexandria, the home to the largest Jewish diaspora community in the world at the time and where the Septuagint, a Greek translation of the Hebrew Bible, was produced. Manetho, an Egyptian priest and historian of that era, wrote scathingly of the Jews. His themes are repeated in the works of Chaeremon, Lysimachus, Poseidonius, Apollonius Molon, and in Apion and Tacitus. Agatharchides of Cnidus ridiculed the practices of the Jews and the "absurdity of their Law", making a mocking reference to how Ptolemy Lagus was able to invade Jerusalem in 320 BCE because its inhabitants were observing the Shabbat. One of the earliest anti-Jewish edicts, promulgated by Antiochus IV Epiphanes in about 170–167 BCE, sparked a revolt of the Maccabees in Judea. In view of Manetho's anti-Jewish writings, antisemitism may have originated in Egypt and been spread by "the Greek retelling of Ancient Egyptian prejudices". The ancient Jewish philosopher Philo of Alexandria describes an attack on Jews in Alexandria in 38 CE in which thousands of Jews died. The violence in Alexandria may have been caused by the Jews being portrayed as misanthropes. Tcherikover argues that the reason for hatred of Jews in the Hellenistic period was their separateness in the Greek cities, the poleis. Bohak has argued, however, that early animosity against the Jews cannot be regarded as being anti-Judaic or antisemitic unless it arose from attitudes that were held against the Jews alone, and that many Greeks showed animosity toward any group they regarded as barbarians. Statements exhibiting prejudice against Jews and their religion can be found in the works of many pagan Greek and Roman writers. Edward Flannery writes that it was the Jews' refusal to accept Greek religious and social standards that marked them out. Hecataetus of Abdera, a Greek historian of the early third century BCE, wrote that Moses "in remembrance of the exile of his people, instituted for them a misanthropic and inhospitable way of life." Manetho, an Egyptian historian, wrote that the Jews were expelled Egyptian lepers who had been taught by Moses "not to adore the gods." Edward Flannery describes antisemitism in ancient times as essentially "cultural, taking the shape of a national xenophobia played out in political settings." There are examples of Hellenistic rulers desecrating the Temple and banning Jewish religious practices, such as circumcision, Shabbat observance, the study of Jewish religious books, etc. Examples may also be found in anti-Jewish riots in Alexandria in the 3rd century BCE. The Jewish diaspora on the Nile island Elephantine, which was founded by mercenaries, experienced the destruction of its temple in 410 BCE. Relationships between the Jewish people and the occupying Roman Empire were at times antagonistic and resulted in several rebellions. According to Suetonius, the emperor Tiberius expelled from Rome Jews who had gone to live there. The 18th-century English historian Edward Gibbon identified a more tolerant period in Roman-Jewish relations beginning in about 160 CE. However, when Christianity became the state religion of the Roman Empire, the state's attitude towards the Jews gradually worsened. James Carroll asserted: "Jews accounted for 10% of the total population of the Roman Empire. By that ratio, if other factors such as pogroms and conversions had not intervened, there would be 200 million Jews in the world today, instead of something like 13 million." Persecutions during the Middle Ages In the late 6th century CE, the newly Catholicised Visigothic kingdom in Hispania issued a series of anti-Jewish edicts which forbade Jews from marrying Christians, practicing circumcision, and observing Jewish holy days. Continuing throughout the 7th century, both Visigothic kings and the Church were active in creating social aggression and towards Jews with "civic and ecclesiastic punishments", ranging between forced conversion, slavery, exile and death. From the 9th century, the medieval Islamic world classified Jews and Christians as dhimmis and allowed Jews to practice their religion more freely than they could do in medieval Christian Europe. Under Islamic rule, there was a Golden age of Jewish culture in Spain that lasted until at least the 11th century. It ended when several Muslim pogroms against Jews took place on the Iberian Peninsula, including those that occurred in Córdoba in 1011 and in Granada in 1066. Several decrees ordering the destruction of synagogues were also enacted in Egypt, Syria, Iraq and Yemen from the 11th century. In addition, Jews were forced to convert to Islam or face death in some parts of Yemen, Morocco and Baghdad several times between the 12th and 18th centuries. The Almohads, who had taken control of the Almoravids' Maghribi and Andalusian territories by 1147, were far more fundamentalist in outlook compared to their predecessors, and they treated the dhimmis harshly. Faced with the choice of either death or conversion, many Jews and Christians emigrated. Some, such as the family of Maimonides, fled east to more tolerant Muslim lands, while some others went northward to settle in the growing Christian kingdoms. In medieval Europe, Jews were persecuted with blood libels, expulsions, forced conversions and massacres. These persecutions were often justified on religious grounds and reached a first peak during the Crusades. In 1096, hundreds or thousands of Jews were killed during the First Crusade. This was the first major outbreak of anti-Jewish violence in Christian Europe outside Spain and was cited by Zionists in the 19th century as indicating the need for a state of Israel. In 1147, there were several massacres of Jews during the Second Crusade. The Shepherds' Crusades of 1251 and 1320 both involved attacks, as did the Rintfleisch massacres in 1298. Expulsions followed, such as the 1290 banishment of Jews from England, the expulsion of 100,000 Jews from France in 1394, and the 1421 expulsion of thousands of Jews from Austria. Many of the expelled Jews fled to Poland. In medieval and Renaissance Europe, a major contributor to the deepening of antisemitic sentiment and legal action among the Christian populations was the popular preaching of the zealous reform religious orders, the Franciscans (especially Bernardino of Feltre) and Dominicans (especially Vincent Ferrer), who combed Europe and promoted antisemitism through their often fiery, emotional appeals. As the Black Death epidemics devastated Europe in the mid-14th century, causing the death of a large part of the population, Jews were used as scapegoats. Rumors spread that they caused the disease by deliberately poisoning wells. Hundreds of Jewish communities were destroyed in numerous persecutions. Although Pope Clement VI tried to protect them by issuing two papal bulls in 1348, the first on 6 July and an additional one several months later, 900 Jews were burned alive in Strasbourg, where the plague had not yet affected the city. Reformation Martin Luther, an ecclesiastical reformer whose teachings inspired the Reformation, wrote antagonistically about Jews in his pamphlet On the Jews and their Lies, written in 1543. He portrays the Jews in extremely harsh terms, excoriates them and provides detailed recommendations for a pogrom against them, calling for their permanent oppression and expulsion. At one point he writes: "...we are at fault in not slaying them...", a passage that, according to historian Paul Johnson, "may be termed the first work of modern antisemitism, and a giant step forward on the road to the Holocaust." 17th century During the mid-to-late 17th century the Polish–Lithuanian Commonwealth was devastated by several conflicts, in which the Commonwealth lost over a third of its population (over 3 million people), and Jewish losses were counted in the hundreds of thousands. The first of these conflicts was the Khmelnytsky Uprising, when Bohdan Khmelnytsky's supporters massacred tens of thousands of Jews in the eastern and southern areas he controlled (today's Ukraine). The precise number of dead may never be known, but the decrease of the Jewish population during that period is estimated at 100,000 to 200,000, which also includes emigration, deaths from diseases, and captivity in the Ottoman Empire, called jasyr. European immigrants to the United States brought antisemitism to the country as early as the 17th century. Peter Stuyvesant, the Dutch governor of New Amsterdam, implemented plans to prevent Jews from settling in the city. During the Colonial Era, the American government limited the political and economic rights of Jews. It was not until the American Revolutionary War that Jews gained legal rights, including the right to vote. However, even at their peak, the restrictions on Jews in the United States were never as stringent as they had been in Europe. In the Zaydi imamate of Yemen, Jews were also singled out for discrimination in the 17th century, which culminated in the general expulsion of all Jews from places in Yemen to the arid coastal plain of Tihamah and which became known as the Mawza Exile. Enlightenment In 1744, Archduchess of Austria Maria Theresa ordered Jews out of Bohemia but soon reversed her position, on the condition that Jews pay for their readmission every ten years. This extortion was known among the Jews as malke-geld ("queen's money" in Yiddish). In 1752, she introduced the law limiting each Jewish family to one son. In 1782, Joseph II abolished most of these persecution practices in his Toleranzpatent, on the condition that Yiddish and Hebrew were eliminated from public records and that judicial autonomy was annulled. Moses Mendelssohn wrote that "Such a tolerance... is even more dangerous play in tolerance than open persecution." Voltaire According to Arnold Ages, Voltaire's "Lettres philosophiques, Dictionnaire philosophique, and Candide, to name but a few of his better known works, are saturated with comments on Jews and Judaism and the vast majority are negative". Paul H. Meyer adds: "There is no question but that Voltaire, particularly in his latter years, nursed a violent hatred of the Jews and it is equally certain that his animosity...did have a considerable impact on public opinion in France." Thirty of the 118 articles in Voltaire's Dictionnaire Philosophique concerned Jews and described them in consistently negative ways. Louis de Bonald and the Catholic Counter-Revolution The counter-revolutionary Catholic royalist Louis de Bonald stands out among the earliest figures to explicitly call for the reversal of Jewish emancipation in the wake of the French Revolution. Bonald's attacks on the Jews are likely to have influenced Napoleon's decision to limit the civil rights of Alsatian Jews. Bonald's article Sur les juifs (1806) was one of the most venomous screeds of its era and furnished a paradigm which combined anti-liberalism, a defense of a rural society, traditional Christian antisemitism, and the identification of Jews with bankers and finance capital, which would in turn influence many subsequent right-wing reactionaries such as Roger Gougenot des Mousseaux, Charles Maurras, and Édouard Drumont, nationalists such as Maurice Barrès and Paolo Orano, and antisemitic socialists such as Alphonse Toussenel. Bonald furthermore declared that the Jews were an "alien" people, a "state within a state", and should be forced to wear a distinctive mark to more easily identify and discriminate against them. Under the French Second Empire, the popular counter-revolutionary Catholic journalist Louis Veuillot propagated Bonald's arguments against the Jewish "financial aristocracy" along with vicious attacks against the Talmud and the Jews as a "deicidal people" driven by hatred to "enslave" Christians. Between 1882 and 1886 alone, French priests published twenty antisemitic books blaming France's ills on the Jews and urging the government to consign them back to the ghettos, expel them, or hang them from the gallows. Gougenot des Mousseaux's Le Juif, le judaïsme et la judaïsation des peuples chrétiens (1869) has been called a "Bible of modern antisemitism" and was translated into German by Nazi ideologue Alfred Rosenberg. Imperial Russia Thousands of Jews were slaughtered by Cossack Haidamaks in the 1768 massacre of Uman in the Kingdom of Poland. In 1772, the empress of Russia Catherine II forced the Jews into the Pale of Settlement – which was located primarily in present-day Poland, Ukraine, and Belarus – and to stay in their shtetls and forbade them from returning to the towns that they occupied before the partition of Poland. From 1804, Jews were banned from their villages and began to stream into the towns. A decree by emperor Nicholas I of Russia in 1827 conscripted Jews under 18 years of age into the cantonist schools for a 25-year military service in order to promote baptism. Policy towards Jews was liberalised somewhat under Czar Alexander II (). However, his assassination in 1881 served as a pretext for further repression such as the May Laws of 1882. Konstantin Pobedonostsev, nicknamed the "black czar" and tutor to the czarevitch, later crowned Czar Nicholas II, declared that "One-third of the Jews must die, one-third must emigrate, and one third be converted to Christianity". Islamic antisemitism in the 19th century Historian Martin Gilbert writes that it was in the 19th century that the position of Jews worsened in Muslim countries. Benny Morris writes that one symbol of Jewish degradation was the phenomenon of stone-throwing at Jews by Muslim children. Morris quotes a 19th-century traveler: "I have seen a little fellow of six years old, with a troop of fat toddlers of only three and four, teaching [them] to throw stones at a Jew, and one little urchin would, with the greatest coolness, waddle up to the man and literally spit upon his Jewish gaberdine. To all this the Jew is obliged to submit; it would be more than his life was worth to offer to strike a Mahommedan." In the middle of the 19th century, J. J. Benjamin wrote about the life of Persian Jews, describing conditions and beliefs that went back to the 16th century: "…they are obliged to live in a separate part of town… Under the pretext of their being unclean, they are treated with the greatest severity and should they enter a street, inhabited by Mussulmans, they are pelted by the boys and mobs with stones and dirt…." In Jerusalem at least, conditions for some Jews improved. Moses Montefiore, on his seventh visit in 1875, noted that fine new buildings had sprung up and, "surely we're approaching the time to witness God's hallowed promise unto Zion." Muslim and Christian Arabs participated in Purim and Passover; Arabs called the Sephardis 'Jews, sons of Arabs'; the Ulema and the Rabbis offered joint prayers for rain in time of drought. At the time of the Dreyfus trial in France, "Muslim comments usually favoured the persecuted Jew against his Christian persecutors". Secular or racial antisemitism In 1850, the German composer Richard Wagner – who has been called "the inventor of modern antisemitism" – published Das Judenthum in der Musik (roughly "Jewishness in Music") under a pseudonym in the Neue Zeitschrift für Musik. The essay began as an attack on Jewish composers, particularly Wagner's contemporaries, and rivals, Felix Mendelssohn and Giacomo Meyerbeer, but expanded to accuse Jews of being a harmful and alien element in German culture, who corrupted morals and were, in fact, parasites incapable of creating truly "German" art. The crux was the manipulation and control by the Jews of the money economy: Although originally published anonymously, when the essay was republished 19 years later, in 1869, the concept of the corrupting Jew had become so widely held that Wagner's name was affixed to it. Antisemitism can also be found in many of the Grimms' Fairy Tales by Jacob and Wilhelm Grimm, published from 1812 to 1857. It is mainly characterized by Jews being the villain of a story, such as in "The Good Bargain" ("Der gute Handel") and "The Jew Among Thorns" ("Der Jude im Dorn"). The middle 19th century saw continued official harassment of the Jews, especially in Eastern Europe under Czarist influence. For example, in 1846, 80 Jews approached the governor in Warsaw to retain the right to wear their traditional dress but were immediately rebuffed by having their hair and beards forcefully cut, at their own expense. Even such influential figures as Walt Whitman tolerated bigotry toward the Jews in America. During his time as editor of the Brooklyn Eagle (1846–1848), the newspaper published historical sketches casting Jews in a bad light. The Dreyfus Affair was an infamous antisemitic event of the late 19th century and early 20th century. Alfred Dreyfus, a Jewish artillery captain in the French Army, was accused in 1894 of passing secrets to the Germans. As a result of these charges, Dreyfus was convicted and sentenced to life imprisonment on Devil's Island. The actual spy, Marie Charles Esterhazy, was acquitted. The event caused great uproar among the French, with the public choosing sides on the issue of whether Dreyfus was actually guilty or not. Émile Zola accused the army of corrupting the French justice system. However, general consensus held that Dreyfus was guilty: 80% of the press in France condemned him. This attitude among the majority of the French population reveals the underlying antisemitism of the time period. Adolf Stoecker (1835–1909), the Lutheran court chaplain to Kaiser Wilhelm I, founded in 1878 an antisemitic, anti-liberal political party called the Christian Social Party. This party always remained small, and its support dwindled after Stoecker's death, with most of its members eventually joining larger conservative groups such as the German National People's Party. Some scholars view Karl Marx's essay "On The Jewish Question" as antisemitic, and argue that he often used antisemitic epithets in his published and private writings. These scholars argue that Marx equated Judaism with capitalism in his essay, helping to spread that idea. Some further argue that the essay influenced National Socialist, as well as Soviet and Arab antisemites. Marx himself had Jewish ancestry, and Albert Lindemann and Hyam Maccoby have suggested that he was embarrassed by it. Others argue that Marx consistently supported Prussian Jewish communities' struggles to achieve equal political rights. These scholars argue that "On the Jewish Question" is a critique of Bruno Bauer's arguments that Jews must convert to Christianity before being emancipated, and is more generally a critique of liberal rights discourses and capitalism. Iain Hamphsher-Monk wrote that "This work [On The Jewish Question] has been cited as evidence for Marx's supposed anti-semitism, but only the most superficial reading of it could sustain such an interpretation." David McLellan and Francis Wheen argue that readers should interpret On the Jewish Question in the deeper context of Marx's debates with Bruno Bauer, author of The Jewish Question, about Jewish emancipation in Germany. Wheen says that "Those critics, who see this as a foretaste of 'Mein Kampf', overlook one, essential point: in spite of the clumsy phraseology and crude stereotyping, the essay was actually written as a defense of the Jews. It was a retort to Bruno Bauer, who had argued that Jews should not be granted full civic rights and freedoms unless they were baptised as Christians". According to McLellan, Marx used the word Judentum colloquially, as meaning commerce, arguing that Germans must be emancipated from the capitalist mode of production not Judaism or Jews in particular. McLellan concludes that readers should interpret the essay's second half as "an extended pun at Bauer's expense". 20th century Between 1900 and 1924, approximately 1.75 million Jews migrated to America, the bulk from Eastern Europe escaping the pogroms. Before 1900 American Jews had always amounted to less than 1% of America's total population, but by 1930 Jews formed about 3.5%. This increase, combined with the upward social mobility of some Jews, contributed to a resurgence of antisemitism. In the first half of the 20th century, in the US, Jews were discriminated against in employment, access to residential and resort areas, membership in clubs and organizations, and in tightened quotas on Jewish enrolment and teaching positions in colleges and universities. The lynching of Leo Frank by a mob of prominent citizens in Marietta, Georgia, in 1915 turned the spotlight on antisemitism in the United States. The case was also used to build support for the renewal of the Ku Klux Klan which had been inactive since 1870. At the beginning of the 20th century, the Beilis Trial in Russia represented modern incidents of blood-libels in Europe. During the Russian Civil War, close to 50,000 Jews were killed in pogroms. Antisemitism in America reached its peak during the interwar period. The pioneer automobile manufacturer Henry Ford propagated antisemitic ideas in his newspaper The Dearborn Independent (published by Ford from 1919 to 1927). The radio speeches of Father Coughlin in the late 1930s attacked Franklin D. Roosevelt's New Deal and promoted the notion of a Jewish financial conspiracy. Some prominent politicians shared such views: Louis T. McFadden, Chairman of the United States House Committee on Banking and Currency, blamed Jews for Roosevelt's decision to abandon the gold standard, and claimed that "in the United States today, the Gentiles have the slips of paper while the Jews have the lawful money". In Germany, shortly after Adolf Hitler and the Nazi Party came to power in 1933, the government instituted repressive legislation which denied Jews basic civil rights. In September 1935, the Nuremberg Laws prohibited sexual relations and marriages between "Aryans" and Jews as Rassenschande ("race disgrace") and stripped all German Jews, even quarter- and half-Jews, of their citizenship (their official title became "subjects of the state"). It instituted a pogrom on the night of 9–10 November 1938, dubbed Kristallnacht, in which Jews were killed, their property destroyed and their synagogues torched. Antisemitic laws, agitation and propaganda were extended to German-occupied Europe in the wake of conquest, often building on local antisemitic traditions. In 1940, the famous aviator Charles Lindbergh and many prominent Americans led the America First Committee in opposing any involvement in a European war. Lindbergh alleged that Jews were pushing America to go to war against Germany. Lindbergh adamantly denied being antisemitic, and yet he refers numerous times in his private writings – his letters and diary – to Jewish control of the media being used to pressure the U.S. to get involved in the European war. In one diary entry in November 1938, he responded to Kristallnacht by writing "I do not understand these riots on the part of the Germans. ... They have undoubtedly had a difficult Jewish problem, but why is it necessary to handle it so unreasonably?", acknowledgement on Lindbergh's part that he agreed with the Nazis that Germany had a "Jewish problem". An article by Jonathan Marwil in Antisemitism, A Historical Encyclopedia of Prejudice and Persecution claims that "no one who ever knew Lindbergh thought him antisemitic" and that claims of his antisemitism were solely tied to the remarks he made in that one speech. In the east the Third Reich forced Jews into ghettos in Warsaw, in Kraków, in Lvov, in Lublin and in Radom. After the beginning of the war between Nazi Germany and the Soviet Union in 1941, a campaign of mass murder, conducted by the Einsatzgruppen, culminated from 1942 to 1945 in systematic genocide: the Holocaust. Eleven million Jews were targeted for extermination by the Nazis, and some six million were eventually killed. Contemporary antisemitism Post-WWII antisemitism There have continued to be antisemitic incidents since WWII, some of which had been state-sponsored. In the Soviet Union, antisemitism has been used as an instrument for settling personal conflicts starting with the conflict between Joseph Stalin and Leon Trotsky and continuing through numerous conspiracy theories spread by official propaganda. Antisemitism in the USSR reached new heights after 1948 during the campaign against the "rootless cosmopolitan" (euphemism for "Jew") in which numerous Yiddish-language poets, writers, painters, and sculptors were killed or arrested. This culminated in the so-called Doctors' Plot in 1952. Similar antisemitic propaganda in Poland resulted in the flight of Polish Jewish survivors from the country. After the war, the Kielce pogrom and the "March 1968 events" in communist Poland represented further incidents of antisemitism in Europe. The anti-Jewish violence in postwar Poland had a common theme of blood libel rumours. 21st-century European antisemitism Physical assaults against Jews in Europe have included beatings, stabbings, and other violence, which increased markedly, sometimes resulting in serious injury and death. A 2015 report by the US State Department on religious freedom declared that "European anti-Israel sentiment crossed the line into anti-Semitism." This rise in antisemitic attacks is associated with both Muslim antisemitism and the rise of far-right political parties as a result of the economic crisis of 2008. This rise in the support for far-right ideas in western and eastern Europe has resulted in the increase of antisemitic acts, mostly attacks on Jewish memorials, synagogues and cemeteries but also a number of physical attacks against Jews. In Eastern Europe the dissolution of the Soviet Union and the instability of the new states brought the rise of nationalist movements and the accusation against Jews for the economic crisis, taking over the local economy and bribing the government, along with traditional and religious motives for antisemitism such as blood libels. Writing on the rhetoric surrounding the 2022 Russian invasion of Ukraine, Jason Stanley relates these perceptions to broader historical narratives: "the dominant version of antisemitism alive in parts of eastern Europe today is that Jews employ the Holocaust to seize the victimhood narrative from the 'real' victims of the Nazis, who are Russian Christians (or other non-Jewish eastern Europeans)". He calls out the "myths of contemporary eastern European antisemitism – that a global cabal of Jews were (and are) the real agents of violence against Russian Christians and the real victims of the Nazis were not the Jews, but rather this group." Most of the antisemitic incidents in Eastern Europe are against Jewish cemeteries and buildings (community centers and synagogues). Nevertheless, there were several violent attacks against Jews in Moscow in 2006 when a neo-Nazi stabbed 9 people at the Bolshaya Bronnaya Synagogue, the failed bomb attack on the same synagogue in 1999, the threats against Jewish pilgrims in Uman, Ukraine and the attack against a menorah by extremist Christian organization in Moldova in 2009. According to Paul Johnson, antisemitic policies are a sign of a state which is poorly governed. While no European state currently has such policies, the Economist Intelligence Unit notes the rise in political uncertainty, notably populism and nationalism, as something that is particularly alarming for Jews. 21st-century Arab antisemitism Robert Bernstein, founder of Human Rights Watch, says that antisemitism is "deeply ingrained and institutionalized" in "Arab nations in modern times". In a 2011 survey by the Pew Research Center, all of the Muslim-majority Middle Eastern countries polled held significantly negative opinions of Jews. In the questionnaire, only 2% of Egyptians, 3% of Lebanese Muslims, and 2% of Jordanians reported having a positive view of Jews. Muslim-majority countries outside the Middle East similarly held markedly negative views of Jews, with 4% of Turks and 9% of Indonesians viewing Jews favorably. According to a 2011 exhibition at the United States Holocaust Memorial Museum in Washington, United States, some of the dialogue from Middle East media and commentators about Jews bear a striking resemblance to Nazi propaganda. According to Josef Joffe of Newsweek, "anti-Semitism—the real stuff, not just bad-mouthing particular Israeli policies—is as much part of Arab life today as the hijab or the hookah. Whereas this darkest of creeds is no longer tolerated in polite society in the West, in the Arab world, Jew hatred remains culturally endemic." Muslim clerics in the Middle East have frequently referred to Jews as descendants of apes and pigs, which are conventional epithets for Jews and Christians. According to professor Robert Wistrich, director of the Vidal Sassoon International Center for the Study of Antisemitism (SICSA), the calls for the destruction of Israel by Iran or by Hamas, Hezbollah, Islamic Jihad, or the Muslim Brotherhood, represent a contemporary mode of genocidal antisemitism. Black Hebrew Israelite antisemitism In 2022, the American Jewish Committee stated that the Black Hebrew Israelite claim that "we are the real Jews" is a "troubling anti-Semitic trope with dangerous potential". Black Hebrew Israelite followers have sought out and attacked Jewish people in the United States on more than one occasion. Between 2019 and 2022, individuals motivated by Black Hebrew Israelitism committed five religiously motivated murders. Black Hebrew Israelites believe that Jewish people are "imposters", who have "stolen" Black Americans' true racial and religious identity. Black Hebrew Israelites promote the Khazar theory about Ashkenazi Jewish origins. In 2019, 4% of African-Americans self-identified as being Black Hebrew Israelites. Causes Antisemitism has been explained in terms of racism, xenophobia, projected guilt, displaced aggression, and the search for a scapegoat. Some explanations assign partial blame to the perception of Jewish people as unsociable. Such a perception may have arisen by many Jews having strictly kept to their own communities, with their own practices and laws. It has also been suggested that parts of antisemitism arose from a perception of Jewish people as greedy (as often used in stereotypes of Jews), and this perception has probably evolved in Europe during medieval times where a large portion of money lending was operated by Jews. Factors contributing to this situation included that Jews were restricted from other professions, while the Christian Church declared for their followers that money lending constituted immoral "usury". Prevention through education Education plays an important role in addressing and overcoming prejudice and countering social discrimination. However, education is not only about challenging the conditions of intolerance and ignorance in which antisemitism manifests itself; it is also about building a sense of global citizenship and solidarity, respect for, and enjoyment of diversity and the ability to live peacefully together as active, democratic citizens. Education equips learners with the knowledge to identify antisemitism and biased or prejudiced messages and raises awareness about the forms, manifestations, and impact of antisemitism faced by Jews and Jewish communities. Geographical variation A March 2008 report by the U.S. State Department found that there was an increase in antisemitism across the world, and that both old and new expressions of antisemitism persist. A 2012 report by the U.S. Bureau of Democracy, Human Rights and Labor also noted a continued global increase in antisemitism, and found that Holocaust denial and opposition to Israeli policy at times was used to promote or justify blatant antisemitism. In 2014, the Anti-Defamation League conducted a study titled Global 100: An Index of Anti-Semitism, which also reported high antisemitism figures around the world and, among other findings, that as many as "27% of people who have never met a Jew nevertheless harbor strong prejudices against him". See also 1968 Polish political crisis Anti-antisemitism Anti-Jewish violence in Eastern Europe, 1944–1946 Anti-Middle Eastern sentiment Anti-Semite and Jew Antisemitism around the world Antisemitism in the anti-globalization movement Antisemitism in the Arab world Antisemitism in Japan Antisemitism in the United States History of antisemitism in the United States Criticism of Judaism Farhud, 1941 Baghdad pogrom Host desecration Jacob Barnet affair Jewish deicide [Christ killers] Judeo-Masonic conspiracy theory Martyrdom in Judaism Universities and Antisemitism Secondary antisemitism Stab-in-the-back myth Timeline of antisemitism Xenophobia Notes References Citations Sources Deutsch, Gotthard, Anti-Semitism Jewish Encyclopedia vol. 1, pp. 641–9. New York, Funk & Wagnalls, 1901. At Internet Archive Poliakov, Léon. The History of Anti-Semitism, Volume 1: From the Time of Christ to the Court Jews, University of Pennsylvania Press: 2003 Poliakov, Léon. The History of Anti-Semitism, Volume 2: From Mohammad to the Marranos, University of Pennsylvania Press: 2003 Poliakov, Léon. The History of Anti-Semitism, Volume 3: From Voltaire to Wagner, University of Pennsylvania Press: 2003 Poliakov, Léon. The History of Anti-Semitism, Volume 4: Suicidal Europe 1870–1933, University of Pennsylvania Press: 2003 Poliakov, Léon (1997). "Anti-Semitism". Encyclopaedia Judaica (CD-ROM Edition Version 1.0). Ed. Cecil Roth. Keter Publishing House. Tausch, Arno (2018). The Return of Religious Antisemitism? The Evidence from World Values Survey Data (17 November 2018). Available at SSRN Tausch, Arno (2015). Islamism and Antisemitism. Preliminary Evidence on Their Relationship from Cross-National Opinion Data (14 August 2015). Available at SSRN or Islamism and Antisemitism. Preliminary Evidence on Their Relationship from Cross-National Opinion Data Tausch, Arno (2014). The New Global Antisemitism: Implications from the Recent ADL-100 Data (14 January 2015). Middle East Review of International Affairs, Vol. 18, No. 3 (Fall 2014). Available at SSRN or The New Global Antisemitism: Implications from the Recent ADL-100 Data Attribution Further reading Brustein, William I., and Ryan D. King. "Anti-semitism in Europe before the Holocaust." International Political Science Review 25.1 (2004): 35–53. online Carr, Steven Alan. Hollywood and anti-Semitism: A cultural history up to World War II, Cambridge University Press 2001. Cohn, Norman. Warrant for Genocide, Eyre & Spottiswoode 1967; Serif, 1996. Fischer, Klaus P. The History of an Obsession: German Judeophobia and the Holocaust, The Continuum Publishing Company, 1998. Freudmann, Lillian C. Antisemitism in the New Testament, University Press of America, 1994. Gerber, Jane S. (1986). "Anti-Semitism and the Muslim World". In History and Hate: The Dimensions of Anti-Semitism, ed. David Berger. Jewish Publications Society. Goldberg, Sol; Ury, Scott; Weiser, Kalman (eds.). Key Concepts in the Study of Antisemitism (Palgrave Macmillan, 2021) online review Hanebrink, Paul. A Specter Haunting Europe: The Myth of Judeo-Bolshevism, Harvard University Press, 2018. . Hilberg, Raul. The Destruction of the European Jews. Holmes & Meier, 1985. 3 volumes. Isser, Natalie. Antisemitism during the French Second Empire (1991) McKain, Mark. Anti-Semitism: At Issue, Greenhaven Press, 2005. Marcus, Kenneth L. The Definition of Anti-Semitism, 2015, Oxford University Press Michael, Robert and Philip Rosen. Dictionary of Antisemitism , The Scarecrow Press, Inc., 2007 Michael, Robert. Holy Hatred: Christianity, Antisemitism, and the Holocaust Nirenberg, David. Anti-Judaism: The Western Tradition (New York: W. W. Norton & Company, 2013) 610 pp. Roth, Philip. The Plot Against America, 2004 Selzer, Michael (ed.). "Kike!" : A Documentary History of Anti-Semitism in America, New York 1972. Small, Charles Asher ed. The Yale Papers: Antisemitism In Comparative Perspective (Institute For the Study of Global Antisemitism and Policy, 2015). online , scholarly studies. Stav, Arieh (1999). Peace: The Arabian Caricature – A Study of Anti-semitic Imagery. Gefen Publishing House. . Steinweis, Alan E. Studying the Jew: Scholarly Antisemitism in Nazi Germany. Harvard University Press, 2006. . Stillman, Norman. The Jews of Arab Lands: A History and Source Book. (Philadelphia: Jewish Publication Society of America. 1979). Stillman, N.A. (2006). "Yahud". Encyclopaedia of Islam. Eds.: P.J. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel and W.P. Heinrichs. Brill. Brill Online  , United States Department of State, 2008. Retrieved 25 November 2010. See HTML version . Vital, David. People Apart: The Jews in Europe, 1789-1939 (1999); 930pp highly detailed Bibliographies, calendars, etc. Jewish Journal of Greater Los Angeles, "Experts explore effects of Ahmadinejad anti-Semitism", 9 March 2007 Lazare, Bernard, Antisemitism: Its History and Causes Anti-Defamation League Arab Antisemitism Why the Jews? A perspective on causes of anti-Semitism Coordination Forum for Countering Antisemitism (with up to date calendar of antisemitism today) Annotated bibliography of anti-Semitism hosted by the Hebrew University of Jerusalem's Center for the Study of Antisemitism (SICSA) Council of Europe, ECRI Country-by-Country Reports Porat, Dina. "What makes an anti-Semite?", Haaretz, 27 January 2007. Retrieved 24 November 2010. Yehoshua, A.B., An Attempt to Identify the Root Cause of Antisemitism , Azure , Spring 2008. Antisemitism in modern Ukraine Antisemitism and Special Relativity External links Prejudice and discrimination by type Racism Orientalism

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https://en.wikipedia.org/wiki/Economy%20of%20Azerbaijan

Economy of Azerbaijan

The economy of Azerbaijan has completed its post-Soviet transition into a major oil-based economy (with the completion of the Baku-Tbilisi-Ceyhan Pipeline), from one where the state played the major role. The transition to oil production led to remarkable growth figures as projects came online; reaching 26.4% in 2005 (second highest GDP growth in the world in 2005 only to Equatorial Guinea) and 34.6% in 2006 (world highest) before subsiding to 10.8% and 9.3% in 2008 and 2009 respectively. The real GDP growth rate for 2011 was expected at 3.7% but had dropped to 0.1%. Large oil reserves are a major contributor to Azerbaijan's economy. The national currency, the Azerbaijani manat, was stable in 2000, depreciating 3.8% against the dollar. The budget deficit equaled 1.3% of GDP in 2000. Progress on economic reform has generally lagged behind macroeconomic stabilization. The government has undertaken regulatory reforms in some areas, including the substantial opening of trade policy, but inefficient public administration in which commercial and regulatory interests are commingled limit the impact of these reforms. The government has largely completed privatization of agricultural lands and small and medium-sized enterprises. In August 2000, the government launched a second-stage privatization program, in which many large state enterprises will be privatized. Since 2001, the economic activity in the country is regulated by the Ministry of Economy of Azerbaijan Republic. Economic history of Azerbaijan Modern era Throughout the Soviet period, Azerbaijan had always been more developed industrially than Armenia and Georgia, two neighboring Transcaucasia countries but also less diversified, as a result of slow investment in the non-oil sector. In this context, Azerbaijan had relevance in the Soviet economy. Also, in the Soviet Era, Azerbaijan was known for its production of cotton, grain, and fruits. With a history of industrial development of more than 100 years, Azerbaijan proved to be a leading nation in the Southern Caucasus throughout the turmoil of the Soviet Union collapse in the early 1990s until nowadays. Republic era Oil remains the most prominent product of Azerbaijan's economy with cotton, natural gas and agriculture products contributing to its economic growth over the last five years. More than $60 billion was invested into Azerbaijan's oil by major international oil companies in AIOC consortium operated by BP. Oil production under the first of these PSAs, with the Azerbaijan International Operating Company, began in November 1997 and now is about 500,000 barrels per day. People visit petroleum spas (or "oil spas") to bathe in the local crude in Naftalan. A leading caviar producer and exporter in the past, Azerbaijan's fishing industry today is concentrated on the dwindling stocks of sturgeon and beluga in the Caspian Sea. Azerbaijan shares all the problems of the former Soviet republics in making the transition from a command to a market economy, but its energy resources brighten its long-term prospects. Azerbaijan has begun making progress on economic reform, and old economic ties and structures are slowly being replaced. An obstacle to economic progress, including stepped up foreign investment, is the continuing conflict with Armenia over the Nagorno-Karabakh region. In 1992, Azerbaijan became member of the Economic Cooperation Organization. In 2002, the Azerbaijani merchant marine had 54 ships. In March 2001, Azerbaijan concluded a natural gas agreement with Turkey, providing a future export market for Azerbaijan. Azerbaijan has concluded 21 production-sharing agreements with various oil companies. An export pipeline that transports Caspian oil to the Mediterranean from Baku through Tbilisi, Georgia to Ceyhan, Turkey (the Baku-Tbilisi-Ceyhan Pipeline) became operational in 2006. The pipeline is expected to generate as much as $160 billion in revenues for the country over the next 30 years. The recent high price of oil is highly beneficial to Azerbaijan's economy as the nation is in the midst of an oil boom. Eastern Caspian producers in Kazakhstan also have expressed interest in accessing this pipeline to transport a portion of their production. In 2010, Azerbaijan entered into the top eight biggest oil suppliers to EU countries with €9.46 billion. In 2011, the amount of foreign investments in Azerbaijan was $20 billion, a 61% increase from 2010. According to Minister of Economic Development of Azerbaijan, Shahin Mustafayev, in 2011, "$15.7 billion was invested in the non-oil sector, while the restin the oil sector". In 2012, because of its economic performance after the Soviet breakup, Azerbaijan was predicted to become "Tiger of Caucasus". In 2012, Globalization and World Cities Research Network study ranked Baku as a Gamma-level global city. In 2015, Turkey and Azerbaijan agreed to boost mutual trade to US$15 billion by 2023. Macro-economic trend The following is a chart of trend of gross domestic product of Azerbaijan at market prices with figures in USD. For purchasing power parity comparisons, the US dollar was exchanged at 1,565.88 Manats only. Currently, the new Manat is in use, with an exchange rate of about 1 manat = $1.10. Mean graduate pay was $5.76 per man-hour in 2010. The following table shows the main economic indicators in 1980–2017. Source: IMF For more than a century the backbone of the Azerbaijani economy has been petroleum, which represented 50 percent of Azerbaijan's GDP in 2005, and is projected to double to almost 125 percent of GDP in 2007. Now that Western oil companies are able to tap deepwater oilfields untouched by the Soviets because of poor technology, Azerbaijan is considered one of the most important areas in the world for oil exploration and development. Proven oil reserves in the Caspian Basin, which Azerbaijan shares with Russia, Kazakhstan, Iran, and Turkmenistan, are comparable in size to the North Sea, although exploration is still in the early stages. Sectors of the economy Agriculture Azerbaijan has the largest agricultural basin in the region. About 54.9 percent of Azerbaijan is agricultural lands. At the beginning of 2007 there were of utilized agricultural area. In the same year the total wood resources counted . Azerbaijan's agricultural scientific research institutes are focused on meadows and pastures, horticulture and subtropical crops, leaf vegetables, viticulture and wine-making, cotton growing and medicinal plants. In some lands it is profitable to grow grain, potatoes, sugar beets, cotton and tobacco. Livestock, dairy products, and wine and spirits are also important farm products. The Caspian fishing industry is concentrated on the dwindling stocks of sturgeon and beluga. Some portions of most products that were previously imported from abroad have begun to be produced locally (among them are Coca-Cola by Coca-Cola Bottlers LTD, beer by Baki-Kastel, parquet by Nehir and oil pipes by EUPEC Pipe Coating Azerbaijan). A new program which is prepared by the European Union is aimed to support the economic diversification of Azerbaijan. Program is considered for southern region Lankaran which has the lowest economic indicator and the lowest income per capita, as well as, the lowest level of investment, but at the same time, high potential for the production of garden products in high quality. The program will be focused on the development of the region at the local and international levels. Azerbaijan produced in 2018: 2.0 million tons of wheat; 916 thousand tons of barley; 898 thousand tons of potato; 609 thousand tons of tomato; 307 thousand tons of watermelon; 277 thousand tons of sugar beet; 277 thousand tons of apple; 247 thousand tons of maize; 235 thousand tons of onion; 233 thousand tons of cotton; 223 thousand tons of cucumber; 167 thousand tons of grape; 160 thousand tons of persimmon (5th largest world producer); 108 thousand tons of cabbage; In addition to smaller productions of other agricultural products, like melon (94 thousand tons), pear (52 thousand tons) and apricot (28 thousand tons). Manufacturing In 2007, mining and hydrocarbon industries accounted for well over 95 percent of the Azerbaijani economy. Diversification of the economy into manufacturing industries remains a long-term issue. As of late 2000s, the defense industry of Azerbaijan has emerged as an autonomous entity with a growing defense production capability. The ministry is cooperating with the defense sectors of Ukraine, Belarus and Pakistan. Along with other contracts, Azerbaijani defence industries and Turkish companies, Azerbaijan will produce 40 mm revolver grenade launchers, 107 mm and 122 mm MLRS systems, Cobra 4×4 vehicles and joint modernization of BTR vehicles in Baku. Services In 2023, there were 1,708 registered companies in the Services sector. Financial and business services The GDP growth rates observed in Azerbaijan during the last years made the country one of the fastest growing economies in the world. But the banking sector of Azerbaijan has yet to tap the vast growth potential that should be achievable due to the continuation of the high economic growth. For this reason the banking sector remains small in relation to the size of the Azerbaijani economy. Since 2002, important stages of restructuring of the banking system have started to be carried out. Taking into consideration the entry of big oil revenues in the country, as a logical result of successful oil strategy, and in this base, as the banks were ready to an effective transfer of their financial resources to the strategic goals, development strategy was made for 2002–2005. By 1 April 2010, 47 banks, 631 bank branches function in Azerbaijan. One of the banks was founded with the participation of state capital, 23 of foreign capital. To the same date, 98 non-bank credit organizations operate in the republic along with banks. Growth of real money incomes of population, development of trust in the bank system, improving the legal bases of protection of interests of creditors and depositors, in particular launch of 'Deposits Insurance Fund' were the criteria characterizing rapid growth of deposits of population. As of 1 April 2010, bank deposits of population were equal to 2,4 billion AZN. 33,3% of them were long-term deposits (higher than a year). As of 1 April 2010, bank credits to customers is 8.5 bn AZN, which makes 70.5% of bank assets. Special weight of private sector in structure of credit investments is higher than 82% (7 bn AZN). Telecommunications In the 21st century, a new oil and gas boom helped to improve the situation in Azerbaijan's science and technology sectors, and the government launched a campaign aimed at modernization and innovation. The government estimates that profits from the information technology and communication industry will grow and become comparable with those from oil production. Azerbaijan has a large and steadily growing Internet sector, mostly uninfluenced by the financial crisis of 2007–2008; rapid growth is forecast for at least five more years. The country has also been making progress in developing its telecoms sector. The Ministry of Communications & Information Technologies (MCIT), as well as being an operator through its role in Aztelekom, is both a policy-maker and regulator. Public payphones are available for local calls and require the purchase of a token from the telephone exchange or some shops and kiosks. Tokens allow a call of indefinite duration. As of 2009, there were 1,397,000 main telephone lines and 1,485,000 internet users. There are five GSM providers: Azercell, Bakcell, Azerfon (Nar Mobile), Aztrank, Catel mobile network operators and one CDMA. Tourism Tourism is an important part of the economy of Azerbaijan. The country was a well-known tourist spot in the 1980s. However, the fall of the Soviet Union, and the First Nagorno-Karabakh War during the 1988–1994 period, damaged the tourist industry and the image of Azerbaijan as a tourist destination. It was not until the 2000s that the tourism industry began to recover, and the country has since experienced a high rate of growth in the number of tourist visits and overnight stays. In recent years, Azerbaijan has also become a popular destination for religious, spa, and health care tourism. During winter, the Shahdag Winter Complex offers skiing. The government of Azerbaijan has set the development of Azerbaijan as an elite tourist destination a top priority. It is a national strategy to make tourism a major, if not the single largest, contributor to the Azerbaijani economy. These activities are regulated by the State Tourism Agency and the Ministry of Culture. The Formula One Grand Prix is held in Baku, the capital city and has been held here for years. Currency system The Azerbaijani manat is the currency of Azerbaijani, denominated as the manat, subdivided into 100 qapik. The manat is issued by the Central Bank of Azerbaijan, the monetary authority of Azerbaijan. The ISO 4217 abbreviation is AZN. The Latinised symbol is (). The manat is held in a floating exchange-rate system managed primarily against the US dollar. The rate of exchange (Azerbaijani manat per US$1) for 28 January 2016, was AZN 1.60. There is a complex relationship between Azerbaijan's balance of trade, inflation, measured by the consumer price index and the value of its currency. Despite allowing the value of the manat to "float", Azerbaijan's central bank has decisive ability to control its value with relationship to other currencies. Infrastructure Energy Two-thirds of Azerbaijan is rich in oil and natural gas. The region of the Lesser Caucasus accounts for most of the country's gold, silver, iron, copper, titanium, chromium, manganese, cobalt, molybdenum, complex ore and antimony. In September 1994, a 30-year contract was signed between the State Oil Company of Azerbaijan Republic (SOCAR) and 13 oil companies, among them Amoco, BP, ExxonMobil, Lukoil and Statoil. As Western oil companies are able to tap deepwater oilfields untouched by the Soviet exploitation, Azerbaijan is considered one of the most important spots in the world for oil exploration and development. Meanwhile, the State Oil Fund of Azerbaijan was established as an extra-budgetary fund to ensure the macroeconomic stability, transparency in the management of oil revenue, and the safeguarding of resources for future generations. Azeriqaz, a sub-company of SOCAR, intends to ensure full gasification of the country by 2021. Transportation The convenient location of Azerbaijan on the crossroad of major international traffic arteries, such as the Silk Road and the south–north corridor, highlights the strategic importance of the transportation sector for the country's economy. The transport sector in the country includes roads, railways, aviation, and maritime transport. Azerbaijan is also an important economic hub in the transportation of raw materials. The Baku-Tbilisi-Ceyhan pipeline (BTC) became operational in May 2006 and extends more than 1,774 kilometers through the territories of Azerbaijan, Georgia and Turkey. The BTC is designed to transport up to 50 million tons of crude oil annually and carries oil from the Caspian Sea oilfields to global markets. The South Caucasus Pipeline, also stretching through the territory of Azerbaijan, Georgia and Turkey, became operational at the end of 2006 and offers additional gas supplies to the European market from the Shah Deniz gas field. Shah Deniz is expected to produce up to 296 billion cubic meters of natural gas per year. Azerbaijan also plays a major role in the EU-sponsored Silk Road Project. In 2002, the Azerbaijani government established the Ministry of Transport with a broad range of policy and regulatory functions. In the same year, the country became a member of the Vienna Convention on Road Traffic. The highest priority being; upgrading the transport network and transforming transportation services into one of the key comparative advantages of the country, as this would be highly conducive to the development of other sectors of the economy. In 2012, the construction of Kars–Tbilisi–Baku railway expected to provide transportation between Asia and Europe through connecting the railways of China and Kazakhstan in the east with Turkey's Marmaray to the European railway system in the west. Broad gauge railways in 2010 stretched for and electrified railways numbered . By 2010, there were 35 airports and one heliport. Regulation Single window system shares needed information through a single gateway with all organizations serving in trade field, as well as abolishes useless processes and raises the effectiveness of cooperation among different parties. 73 economies implement single window system in the world. Azerbaijan started to implement this system in 2009. It implemented an E-Government portal as well. A single-window system was established by a decree of the Azerbaijani President issued in 2007, 30 April, in order to simplify export-import procedures, innovate customs services, and improve the trade environment. According to the decree, Ministry of Justice, Ministry of Economic Development, Ministry of Taxes, Ministry of Labor and Social Protection, State Social Protection Fund, and State Statistics Committee should present a proposal on the organization of entrepreneurial activities by single registration body based on single window principle. The president appointed the State Customs Committee as the leading body of controlling goods and transportation passing through the borders of the country in 2008. A "single authority principle" requires customs officials to be more responsible in dealing with all types of border control operations for other authorities. The Netherlands and Sweden were the countries of which practice studied. A "single system" works on and then shares standardized information accumulated from traders to all entities taking part in international trade. The practice of US was explored in this phase. An "automated system" provides a single electronic statement to responsible agencies submitted by traders to be worked on and confirmed, and after that, these authorities send electronic confirmations and announcements. In this case, practice of Mauritius and Singapore was studied. The Customs Committee formed a commission to realize the new system. Ministry of Agriculture, Ministry of Healthcare, Ministry of Internal Affairs, Ministry of Taxes, Ministry of Transportation, Central Bank, State Road Police, State Committee for Standardization, Metrology and Patents, State Maritime Administration were selected as important agencies to implement single window system along with the State Customs Committee. The government supported Customs Committee in preparing its staff to deal with the new system by improving recruitment of local customs offices, providing with software and hardware upgrades for the system. Azerbaijani government supports financially single window system. In the first phase, the government realized customs clearance system on the process of border crossing to country beginning from 1 January 2009. This system was free to all users. Then it was expanded to Baku and Sumgayit in 2011. Customs code of the Republic of Azerbaijan was amended based on the inclusion of the article on single window system which became operative on 1 January 2012. After this amendment, all of Azerbaijan's 29 customs checkpoints started to implement new single window system. According to the Presidential Decree (11 November 2008), the "single window" principle started to be applied from 1 January 2009 on the inspection of goods and transportation at the border checkpoints. Customs Committee established a commission working on the implementation of "single window" principle in customs agencies on 18 November 2008 based on the Presidential Decree of 11 November 2008. Technological scheme determining the sequence of issuance of "permit" certificates was approved by the Customs Committee on 22 December 2009. Scheme provided customs officers to issue "permit" certificates at border checkpoints to vehicles, which perform customs, veterinary, photo-sanitary and sanitary quarantine control activities and international automobile transportation in accordance with legislation. The State Migration Service issues appropriate permits for foreigners and stateless persons coming to Azerbaijan to live and work on legal grounds, simplifying the procedure of their registration at the place of residence, and ensuring transparency in these processes. The "single window" principle has been applied on migration management processes starting from 1 July 2009 according to the Decree. Business environment As of October 2014, Azerbaijan holds the highest foreign investment per capita among the Commonwealth of Independent States (CIS) countries. Germany, for example, has invested approximately $760 million into the Azerbaijani economy, and approximately 177 German companies operate within Azerbaijan. Since gaining its independence, companies have invested $174 billion into Azerbaijan. Foreign investment accounts for around half of that amount. In 2008, Azerbaijan was cited as the top reformer by the World Bank's Doing Business report: According to World Bank's Doing Business report 2019, Azerbaijan improved its position in the Ease of doing business rank from 57 to 25, as well as ranked 4th among the top 10 improvers. Implementing a record number of reforms mainly involving institutional changes have made it easier to do business in Azerbaijan in 2017–2018 period, as a result time and cost to get construction permit reduced significantly (time by 80 days and cost by 12.563 AZN), process of connecting electricity grid rationalized, as well as getting credit simplified. Poverty Other economic indicators Data from CIA World Factbook unless noted otherwise Investment (gross fixed) 17% of GDP (2011 est.) Household income or consumption by percentage share lowest 10%: 3.4% highest 10%: 27.4% (2008) Inflation rate (consumer prices) 1.1% (2012 est.) Agriculture utilized agricultural land: (2011) total wood resources: 144,2 million cubic metres crops: cotton, grain, rice, grapes, fruit, vegetables, tea, tobacco livestock products: beef, mutton, poultry, milk, eggs Industrial production growth rate -3% (2011 est.) Electricity production: 22,55 billion kWh (2008) consumption: 18,8 billion kWh (2008) exports: 812 million kWh (2008) imports: 596 million kWh (2008) Current account balance $11,12 billion (2011 est.) Exports commodities petroleum and natural gas, petroleum products, oilfield equipment; steel, iron ore, cement; chemicals, petrochemicals, textiles, machinery, cotton, foodstuffs. Reserves of foreign exchange and gold $7,146 billion (2011 est.) Debt external $3.89 billion (2011 est.) Currency 1 Manat = 100 gepik Exchange rates Azerbaijani manat per US dollar 1.7 (for 22 November 2020) Azerbaijani manat per Euro 2.01 (for 22 November 2020) Fiscal year Calendar year See also Azerbaijan and the International Monetary Fund List of companies of Azerbaijan Baku-Tbilisi-Ceyhan pipeline State Oil Company of Azerbaijan Petroleum industry in Azerbaijan Agriculture in Azerbaijan Tourism in Azerbaijan Baku Military of Azerbaijan Judiciary of Azerbaijan References Further reading Habibov, Nazim: "Poverty in Azerbaijan" in the Caucasus Analytical Digest No. 34 External links Hübner, Gerald: "As If Nothing Happened? How Azerbaijan's Economy Manages to Sail Through Stormy Weather" in the Caucasus Analytical Digest No. 18 Azerbaijan

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https://en.wikipedia.org/wiki/Azerbaijani%20Armed%20Forces

Azerbaijani Armed Forces

The Azerbaijani Armed Forces () is the military of the Republic of Azerbaijan. It was re-established according to the country’s Law of the Armed Forces on 9 October 1991. The original Azerbaijan Democratic Republic's armed forces were dissolved after Azerbaijan was absorbed into the Soviet Union as the Azerbaijan Soviet Socialist Republic from 28 April 1920. After the Soviet Union dissolved in 1991–92, Azerbaijan's armed forces were reformed based on Soviet bases and equipment left on Azerbaijani soil. The armed forces have three branches: the Azerbaijani Land Forces, the Azerbaijani Air and Air Defence Force, and the Azerbaijani Navy. Associated forces include the Azerbaijani National Guard, the Internal Troops of Azerbaijan, and the State Border Service, which can be involved in state defense under certain circumstances. According to the Azerbaijani media sources the military expenditures of Azerbaijan for 2009 were set at US$2.46 billion, however according to Stockholm International Peace Research Institute, only $1.473 billion was spent in that year. IISS also suggests that the defence budget in 2009 was $1.5 billion. The Ministry of Defence Industry of Azerbaijan supervises the design, manufacturing, regulation and maintenance of military equipment. In the future, Azerbaijan hopes to start building tanks, armored vehicles, military planes and military helicopters. Overview Since the fall of the Soviet Union, Azerbaijan has been trying to further develop its armed forces into a professional, well trained, and mobile military. Azerbaijan has been undergoing extensive modernization and capacity expanding programs, with the military budget increasing from around $300 million in 2005 to $2.46 billion in 2009. The total armed forces number 56,840 men in the land forces, 7,900 men in the air force and air defence force, and 2,200 men in the navy. There are also 19,500 personnel in the National Guard, State Border Service, and Internal Troops. In addition, there are 300,000 former service personnel who have had military service in the last 15 years. The military hardware of Azerbaijan consists of 220 main battle tanks, an additional 162 T-80's were acquired between 2005 and 2010, 595 armored combat vehicles and 270 artillery systems. The air force has about 106 aircraft and 35 helicopters. Azerbaijan has acceded to the Nuclear Non-Proliferation Treaty as a non-nuclear weapons state. Azerbaijan participates in NATO's Partnership for Peace. Azerbaijan joined the multi-national force in 2003. It sent 150 troops to Iraq, and later troops to Kosovo. Azerbaijani troops also served in Afghanistan. Despite the rise in Azerbaijan's defence budget, the armed forces were assessed in 2008 as not having a high state of battle readiness and being ill-prepared for wide scale combat operations. The Second Karabakh War demonstrated how Azerbaijan's military capabilities had risen. History of the Azerbaijani armed forces Azerbaijan Democratic Republic The history of the modern Azerbaijan army dates back to Azerbaijan Democratic Republic in 1918, when the Armed Forces of the Republic of Azerbaijan were created on 26 June 1918. First de facto Minister of Defense of ADR was Dr. Khosrov bey Sultanov. When the Ministry was formally established Gen. Samedbey Mehmandarov became the minister, and then Lt-Gen. Ali-Agha Shikhlinski his deputy. Chiefs of Staff of ADR Army were Lt-Gen. Maciej Sulkiewicz (March 1919 – 10 December 1919) and Maj-Gen. Abdulhamid bey Gaitabashi (10 December 1919 – April 1920). The Red Army invaded Azerbaijan on 28 April 1920. Although the bulk of the newly formed Azerbaijani army was engaged in putting down an Armenian revolt that had just broken out in Karabakh, the Azerbaijanis did not surrender their brief independence of 1918–20 quickly or easily. As many as 20,000 of the total 30,000 soldiers died resisting what was effectively a Russian reconquest. The national Army of Azerbaijan was abolished by the Bolshevik government, 15 of the 21 army generals were executed by the Bolsheviks. Russian Civil War After the Sovietisation of Azerbaijan, the newly formed Azerbaijani Red Army replaced the previous army, taking part in the Russian Civil War, and the invasion of Georgia. World War II During World War II, Azerbaijan played a crucial role in the strategic energy policy of Soviet Union. Much of the Soviet Union's oil on the Eastern Front was supplied by Baku. By a decree of the Supreme Soviet of the USSR in February 1942, the commitment of more than 500 workers and employees of the oil industry of Azerbaijan was recognised with orders and medals. Operation Edelweiss carried out by the German Wehrmacht targeted Baku because of the importance of its oil fields to the USSR. Some 800,000 Azerbaijanis fought within the ranks of the Soviet Army of which 400,000 died. Azerbaijani national formations of the Red Army included the 223rd, 227th, 396th, 402nd, and 416th Rifle Divisions. Azerbaijani Major-General Hazi Aslanov was awarded a second Hero of the Soviet Union after a long post-war fight for recognition of his accomplishments. Dissolution of the Soviet armed forces During the Cold War, Azerbaijan had been the deployment area of units of the Soviet 4th Army whose principal formations in 1988 included four motor rifle divisions (23rd Guards, 60th, 75th, and 295th). The 75th Motor Rifle Division was isolated in Nakhchivan. The 4th Army also included missile and air defense brigades and artillery and rocket regiments. The 75th Division's stores and equipment were apparently transferred to the Nakhchivan authorities. Azerbaijan also hosted the 49th Arsenal of the Soviet Main Agency of Missiles and Artillery, which contained over 7,000 train-car loads of ammunition to the excess of one billion units. The first president of Azerbaijan, Ayaz Mutallibov, did not wish to build an independent army, wanting to rely instead largely on Soviet troops. Even when the Parliament decided that an army should be formed in September 1991, disagreements between the government and the opposition Azerbaijani Popular Front Party impeded creation of a unified force. Around this time, the first unit of the new army was formed on the basis of the 18–110 military unit of mechanized infantry of the Soviet Ground Forces (probably part of the 4th Army) located in Shikhov, south of Baku. At the time of the parliamentary decision, Lieutenant-General Valeh Barshadli became the first Minister of Defense of Azerbaijan, from 5 September to 11 December 1991. Later from May to 4 September 1992 he served as Chief of General Staff of Azerbaijani Armed Forces. Newly formed military In summer 1992, the nascent Defense Ministry received a resolution by the Azerbaijani president on the takeover of units and formations in Azerbaijani territory. It then forwarded an ultimatum to Moscow demanding control over vehicles and armaments of the 135th and 139th Motor Rifle Regiments of the 295th Motor Rifle Division. In July 1992, Azerbaijan ratified the Treaty on Conventional Armed Forces in Europe (CFE), which establishes comprehensive limits on key categories of conventional military equipment. Azerbaijan approved the CFE flank agreement in May 1997. The transfer of the property of the 4th Army (except for part of the property of the 366th Motor Rifle Regiment of the 23rd Guards Motor Rifle Division captured by Armenian armed formations in 1992 during the regiment's withdrawal from Stepanakert) and the 49th arsenal was completed in 1992. Thus, by the end of 1992, Azerbaijan received arms and military hardware sufficient for approximately four motor rifle divisions with prescribed army units. It also inherited naval ships. There are also reports that 50 combat aircraft from the disbanded 19th Army of the Soviet Air Defence Forces came under Azerbaijani control. The Azerbaijani armed forces took a series of devastating defeats by Armenian forces during the 1992–1994 Nagorno-Karabakh War, which resulted in the loss of control of Nagorno-Karabakh proper and seven surrounding rayons, comprising roughly 20% of the territory of Azerbaijan. Azerbaijani sources insist that Armenian victory was largely due to military help from Russia and the wealthy Armenian diaspora. Armenians partially deny the allegation, claiming that Russian side was equally supplying Armenian and Azerbaijani sides with weapons and mercenaries. During the war, the Azerbaijani armed forces were also aided by Turkish military advisers, and Russian, Ukrainian, Chechen and Afghan mercenaries. 21st century A number of Azerbaijani human rights groups have been tracking non-combat deaths and have noted an upward trend in early 2010s. Based on Defense Ministry statistics that had not been released to the public, the Group of Monitoring Compliance with Human Rights in the Army (GMCHRA) has recorded the deaths of 76 soldiers to date in non-combat incidents for 2011, and the injury of 91 others. In comparison, there were 62 non-combat deaths and 71 cases of injury in 2010. The string of non-combat deaths raises questions about the reform progress of the military. Factors behind the deaths include bullying, hazing, and the systemic corruption within the Azerbaijani military. In 2017, Azerbaijani authorities used large scale torture (the Tartar Case) on Azerbaijani military personnel accused of treason. Generals Nacmeddin Sadikhov and Hikmet Hasanov were accused of torturing Azerbaijani officers and soldiers and according to the authorities and human rights defenders, more than 400 people were subjected to torture in the course of the case. The Azerbaijani authorities claimed one person was killed as a result, while human rights defenders say the number is about 13, and many were wrongfully convicted and given hefty prison sentences. Second Karabakh War The Second Karabakh War (also known in Azerbaijan as "The Patriotic War" or "Operation Iron Fist") began on the morning of 27 September 2020 when Azerbaijan launched an offensive along the Line of Contact. On the seventh day of the war, a major offensive was launched by the ground forces, advancing in the north, making some territorial gains while the fighting gradually shifted to the south. Following the capture of Shusha, the second-largest settlement in Nagorno-Karabakh, by Azerbaijani forces, a ceasefire agreement was signed between Azerbaijan, and Armenia, ending all hostilities in the area. Under the agreement, Armenia returned the surrounding territories it occupied in 1994 to Azerbaijan while Azerbaijan gained land access to its Nakhchivan exclave. Total casualties were in the low thousands. During the war, the Azerbaijani army was widely accused of committing war crimes against Armenian soldiers and civilians. Human Rights Watch and Amnesty International both condemned Azerbaijan's “indiscriminate” shelling of Armenian civilians, including the use of cluster munitions. In addition, videos of Azerbaijani soldiers mistreating or executing captive Armenians were circulated online and received widespread condemnation. On 10 December, a victory parade was held in honor of the Azerbaijani Army on Azadliq Square, with 3,000 soldiers marching alongside military equipment, unmanned aerial vehicles and aircraft. In August 2022, the UN Committee on the Elimination of Racial Discrimination expressed deep concern regarding "severe and grave human rights violations committed during 2020 hostilities and beyond by the Azerbaijani military forces against prisoners of war and other protected persons of Armenian ethnic or national origin, including extrajudicial killings, torture and other ill-treatment and arbitrary detention as well as the destruction of houses, schools, and other civilian facilities." Structure Command Since the fall of the Soviet Union, there have been attempts in the defence ministry to reform the military to be more in line with the Turkish/NATO model, resulting in Soviet-legacy officers such as Rovshan Akbarov and Najmeddin Sadikov being removed from power. Azerbaijan periodically holds drills to improve interaction and combat coordination between the servicemen during operations, its military personnel’s combat readiness, as well as to develop commanders' military decision-making and unit management skills. Land Forces The Azerbaijani Land Forces number 85,000 strong, according to UK Advanced Research and Assessment Group estimates. The 2,500 men of the National Guard are also part of the ground forces. In addition, there are 300,000 former service personnel who have had military service in the last 15 years. Other paramilitary agencies consist of Interior Ministry Internal Troops of Azerbaijan, 12,000 strong, and the land component of the State Border Service, 5,000 strong. Azerbaijan has signed numerous contracts to strengthen its armed forces and to train its military with Turkey's assistance. Over the last 15 years, Azerbaijan has been preparing its military for possible action against Armenian forces in Nagorno-Karabakh. The Land Forces consist of five army corps: 1st Army Corps also known as Barda Army Corps (concentrated near Ganja) 2nd Army Corps also known as Beylagan Army Corps (concentrated against Armenian occupied territories and part is deployed on the Azerbaijan-Iranian border) 3rd Army Corps also known as Shamkir Army Corps (concentrated against Armenian occupied territories) 4th Army Corps also known as Baku Army Corps (covers Absheron Peninsula and the coast) Nakhchivan Separate Combined Arms Army (deployed in Nakhchivan) The Land Forces include 23 motor rifle brigades, an artillery brigade, a multiple rocket launcher brigade, and an anti-tank regiment. The IISS Military Balance reported in 2007 that the Land Forces had an estimated 40 SA-13 Gopher, SA-4 Ganef, and SA-8 Gecko air defence missile systems, with '80–240 eff.' to support the army in the battlefield. (IISS 2007, p. 157) The peacekeeping forces of Azerbaijan are mostly supplied from the Land Forces, though the Internal Troops of Azerbaijan do also supply some. As of March 2011, 94 peacekeepers were deployed with the International Security Assistance Force (ISAF) in Afghanistan. In the past, it also actively supported the peacekeeping operation in Kosovo and Iraq. The Azerbaijani peacekeeping unit deployed in Iraq consisted of 14 officers, 16 sergeants and 120 privates, a total of 150 troops. The unit secured the hydroelectric power station and reservoir in Al Haditha from August 2003. In December 2008, Azerbaijan withdrew the unit from Iraq. Reportedly in December 2014 Azerbaijan created the Separate Combined Arms Army in Nakhchivan. Karam Mustafayev became commander of the corps. The army was created based on the Nakhchivan 5th Army Corps to strengthen defense capability of Nakhchivan Autonomous Republic, increase of combat capability of military units and formations of the Armed Forces, improve central control, reports quoting the Defence Ministry said. Air forces The Azerbaijani Air and Air Defence Force is a single unified service branch. Some 8,000 men serve in the air force and air defence force. The Air and Air Defence Force has around 106 aircraft and 35 helicopters. The country has four major airbases. Nasosnaya (air base) has fighters, Kyurdamir Air Base a bomber regiment, Ganja Air Base transports, and Baku Kala Air Base the helicopter unit. There are also four other airbases which do not appear to have aircraft based there. These are Dollyar Air Base, Nakhchivan Airport, Sanqacal Air Base, and Sitalcay Air Base. The Azerbaijani Air Force using MiG-21, Su-24 and Su-25 aircraft, as well as the MiG-29 purchased from Ukraine in 2006 and Il-76 transport aircraft. The MiG-29 have been designated as the standard aircraft for the AzAF. Azerbaijan is holding talks with either the People's Republic of China or Pakistan to purchase JF-17 Thunder aircraft. MiG-25s previously in service have been retired seemingly in the 2007–09 period. Azerbaijan's helicopter force is concentrated at Baku Kala Air Base and according to the IISS consists of a single regiment with around 14–15 Mi-24, 12–13 Mi-8 and 7 Mi-2. Jane's Information Group and the IISS give figures which agree with only a single aircraft's difference. Recently, end of 2010 Russian Rosvertol announced that Azerbaijan armed forces signed a deal for 24 pieces of Mi-35M (Hind-E) gunships what would further enhance the Azerbaijani ground attack formations. The Air Force has L-39 advanced training aircraft in store. The Azerbaijan Border Guard and Voluntary Society of Defense, Patriotism and Sport have Yakovlev light training aircraft. Azerbaijan has missile and radar systems intended to defend Azerbaijani airspace. There are at least 2 divisions of S-300PMU2. Thereby the country has one of the most capable SAM surface-to-air missile system in the region. Azerbaijan also operates two S-200 (SA-5 GAMMON) batteries near Baku and Mingachevir; the S-300PMU-2 represents a logical replacement for these systems offering coverage of the majority of the nation. The country also has about 100 NATO designated SA-2 Guideline (original name S-75), SA-3 Goa (S-125 Pechora-2M), and the SA-5 Gammon (S-200) are in static installations. These may be around Baku and the central part to cover the whole Azerbaijani aerospace. However, August 2011 investigations shows that after purchase of S-300 surface-to-air missiles, the largest apparent gap in Azerbaijan's air defense system may have been filled. Also in Azerbaijan there was a former Soviet early warning radar. The Gabala Radar Station was a bistatic phased-array installation, operated by the Russian Space Forces. The contract was signed in 2002 and was due to expire in 2012 where it was to be given back to the Azerbaijani government. The contract costed Russia $7 million per year. The radar station had a range of up to , and was designed to detect intercontinental ballistic missile launches as far as from the Indian Ocean. In December 2012 Russia announced that negotiations had been unsuccessful and that they had stopped using the radar station. The site was given back to Azerbaijan and all the equipment dismantled and transported to Russia. Nowadays, Russia covers the area from the Armavir Radar Station. Navy The main naval base of the Soviet Union in the Caspian Sea was based in Baku. When the Soviet Union collapsed, Azerbaijan inherited the naval base and parts of the Caspian Sea Flotilla. The Azerbaijan Navy has about 2,200 personnel. In 2010, the navy had a Petya class light frigate, Qusar (G 121), and a number of patrol craft, including one Turk class, Araz, P 223, one Brya (Project 722) class, P 218, one Shelon (Project 1388M) class, P 212, one Poluchat class (Project 368), P 219, one Luga class (Project 888), T 710, and four Petrushka (Polish UK-3 class), P 213, P 214, P 215, and P 216. There are four minesweepers consisting of 2 Sonya class minesweeper and 2 Yevgenya class minesweepers. (Jane's Fighting Ships 2010) The Navy is also attributed with 5 landing craft, 3 Polnochny and 2 Vydra (IISS 2007), plus three research ships, 1 Project 10470, A 671, ex Svyaga, 1 Balerian Uryvayev class survey vessel (AG) and one Vadim Popov class survey vessel (AG). The U.S. Navy has helped train the Azerbaijani Navy. There is also an agreement to provide US support to refurbish Azerbaijani warships in the Caspian Sea. In 2006, the US Government donated 3 motorboats to the Azerbaijani Navy. In 2007, an agreement between the Azerbaijani Navy and a US military company was concluded, which stated that a part of the Azerbaijani Navy would be equipped with advanced laser marksmanship systems. The US company specialists were also to give training on the use of the new equipment. A number of separate U.S. programmes are underway under the Caspian Guard Initiative, focused mostly on enhancing Azerbaijani and Kazakh maritime border security. In May 2011, the president of the State Oil Company of Azerbaijan Republic Rovnag Abdullayev stated that Azerbaijan would start production of national warships after 2013. The Naval Intelligence of Azerbaijan maintains the 641st Special Warfare Naval Unit. The special forces were trained by the U.S. Navy SEALs Unit 641 has several midget submarines such as Triton-1M and Triton 2 at their disposal as well as underwater tool motion for individual divers. The special unit is composed of 3 reconnaissance groups, 2 groups for mountainous warfare, and one diving group. Obligatory training includes parachute jumping day and night, on land and on water. Special forces The Special Forces of Azerbaijan are part of the Ministry of Defence. It was established in April 1999 with officers and warrant officers who had participated in the First Nagorno-Karabakh War of 1991–1994. The Turkish Special Forces Command played a role in the formation of the unit. During the 2020 Nagorno-Karabakh War, personnel of the Special Forces reclaimed the city of Jebrayil and nine surrounding villages from the Armenian Army. On November 8, Aliyev congratulated the commander of the Special Forces on their "liberation of Shusha". The war was considered to be first time Azerbaijan has actively used all of its special forces units. Defense industry The Ministry of Defence Industry of Azerbaijan directs domestic military supplies for Azerbaijan. It was established in 2005. The Defence Industries Ministry subsumed the State Department for Military Industry and for Armaments and the Military Science Center, each of which was formerly a separate agency within the Azerbaijani Defense Ministry. The defense industry has emerged as an autonomous entity with a growing production capability. The ministry is cooperating with the defense sectors of Ukraine, Belarus and Pakistan. Along with other contracts, Azerbaijani defence industries and Turkish companies, Azerbaijan will produce 40mm revolver grenade launchers, 107mm and 122mm MLRS systems, Cobra 4×4 vehicles and joint modernization of BTR vehicles in Baku. The major military companies of Azerbaijan are: RPE Iglim, aviation and shipbuilding Radiogurashdirma, communication means and radio-electronic RPE Neftgazavtomat, devices and automation systems for monitoring technological processes RPE Automatic Lines, non-standard equipment and products for application in electrotechnical and machine engineering Avia-Agregat, multi-purpose aviation equipment, various airdrome conditioners, universal container of board conductor, air-to-air radiators, fuel-oil, air-to-air heat exchangers and ventilators In early 2008, reports indicated that an agreement with Turkey had been signed which would lead to Azerbaijan producing armoured personnel carriers, infantry fighting vehicles, and small calibre artillery pieces. International cooperation Azerbaijan cooperates with about 60 countries in the military-technical sphere and has an agreement on military-technical cooperation with more than 30 countries. Turkey In December 2009, an agreement on military assistance was signed by Turkey and Azerbaijan. The agreement envisions Ankara supplying Azerbaijan with weapons, military equipment, and, if necessary, soldiers in case war with Armenia over Karabakh resumes. Turkey has provided Azerbaijan with infantry weapons, tactical vehicles (jeeps, trucks, etc.) professional training, military organization, technology transfer, licensed military hardware production, and other services. Due to help from Turkish specialists and instructors, thousands of Azerbaijani officers have been trained to western standards. The military position as international importance of Azerbaijan increased with an agreement between Azerbaijan and Turkey on the participation an Azerbaijani peacekeeping platoon in the staff of the Turkish battalion in Kosovo. Since 1992, Azerbaijan and Turkey have signed more than 100 military protocols, some of the major protocols include: Cooperation of staff members National security cooperation in the topographical area Forming and training of professional school of forces in Baku Carrying out of the material and technical purchasing Military industry cooperation Development of the 5th Army Corps also known as Nakhchivan Army Corps in Nakhchivan Cooperation in the area of military history, military archives and museum work and military publication Assistance on training, material and technical between the Azerbaijan Border Guard and the Turkish Armed Forces. Long-term economical and military cooperation and application of the financial aid Application of material and technical provision In May 2011, Azerbaijan had discussed the purchase of long-range rockets from two Chinese companies, the minister of the defence industry has said. Other arms deals were signed with Turkey. Turkish Defence Minister Vecdi Gonul and Yaver Jamalov signed a protocol of intent on future joint production of two types of output – 107-mm rockets and the national rifle, possibly the Mehmetçik-1. A protocol of intent was signed the same day with the Mechanical and Chemical Industry Corporation MKEK on the joint production of 120-mm mortar launchers. This project will come into force in a few months time. Agreement has also been reached with Turkish company Aselsan on the production of some types of defence output in Azerbaijan, specifically the latest types of weapons' sights. These projects will probably happen in the near future too. Recently, Turkish defense industries secretariat told that an export version of the T-155 Firtina self-propelled howitser is almost done and could start production. T-155 has been powered by a German MTU power pack, which restricts the sale to some countries like Azerbaijan. The Turkish manufacturer MKEK, has announced that they have found an alternate supplier for the power pack where Azerbaijan showed interest to buy the high tech, more capable 155mm 52 caliber from Turkish authorities. United States Section 907 of the United States Freedom Support Act bans any kind of direct United States aid to the Azerbaijani government. Since a waiver was made in 2001 there has been extensive U.S. military cooperation with Azerbaijan. This has included Special Forces and naval aid, consultations with United States European Command, and linkages through the U.S. National Guard State Partnership Program. On 19 May 2006, Azerbaijani Defense Minister Safar Abiyev and the then commander of United States Air Forces in Europe General Tom Hobbins met in Baku to discuss military cooperation. He said the objective of his visit was to become familiar with the state of Azerbaijani armed forces. Hobbins pointed to the progress made in the NATO-Azerbaijan relations, saying that the successful implementation of the NATO Partnership for Peace program in Azerbaijan has brought the country even closer to the alliance. He said that the two countries' air forces will expand cooperation. The U.S. state of Oklahoma is linked with Azerbaijan through the U.S. National Guard State Partnership Program (SPP). Oklahoma National Guard troops have been sent on training and humanitarian missions to Baku. Russia Russia is one of Azerbaijan's main suppliers of arms. "As of today, military and technical cooperation with Russia is measured at $4 billion and it tends to grow further," President Ilham Aliyev said after meeting with Russian President Vladimir Putin in Baku in 2013. Israel Azerbaijan and Israel cooperate on numerous areas of the defense industry. Israel is Azerbaijan's largest weapon supplier with $4.85 billion in sales during 2016 alone. Azerbaijan has shown great interest in Israeli technology over the years. In particular, an agreement was reached over the construction of the factory of intelligence and combat drones in Azerbaijan. The Israeli defense company Elta Systems Ltd has had cooperation from Azerbaijan in building the TecSAR reconnaissance satellite system, which can take high-definition photos of ground surfaces in all weather conditions. According to Azerbaijani military experts, the TecSAR system will be indispensable for military operations in the mountainous terrains of Azerbaijan. As of June 2009, Israel and Azerbaijan had been negotiating on the production of Namer armoured infantry fighting vehicles in Azerbaijan. There is no further information as to whether any agreement has been made. NATO The North Atlantic Treaty Organization (NATO) and Azerbaijan actively cooperate on defence institutional reforms and have developed practical cooperation in many other areas. Azerbaijan's Individual Partnership Action Plan (IPAP) and its Partnership for Peace (PfP) linkages lay out the programme of cooperation between Azerbaijan and NATO. The Azerbaijani government has however delayed implementing IPAP-recommended reforms, however, in part at least because no decision had been taken to seek NATO membership. This is because Azerbaijan's foreign policy 'seeks to balance interests with the U.S., EU, Russia and Iran.' According to a NATO diplomatic source some key officials at NATO headquarters in Brussels were pushing hard for engaging Azerbaijan on the membership question. "Turkey, Romania, Italy, Poland, the United Kingdom and the Baltic states," are among the member-states also backing a fast track for Azerbaijan's NATO membership. However, Azerbaijan made its policy of not being aligned with a geopolitical/military structure official when it became a full member of the Non-Aligned Movement in 2011. There is also a limited amount of military cooperation with the other countries of GUAM: Georgia, Ukraine, Azerbaijan, and Moldova. Personnel Educational system The purpose of Azerbaijani military education & training is to train soldiers, officers, and non-commissioned officers to have independent and creative thinking and commitment to the Azerbaijani people and the government. Military education in the Azerbaijani Armed Forces have been described as either being Secondary education, Further education, or Higher education. Azerbaijani pilots were formerly trained in the Azerbaijan Air Force School, where they would then develop their skills in operational units. Azerbaijan has an experience exchange with Turkey, Ukraine, the United States and a number of NATO countries. The Turkish Air Force School has a great role in the training of Azerbaijani military pilots. Azerbaijani pilots are also trained in Ukraine's Pilot Training School. The following is a list of educational institutions in the armed forces, under the auspices of the National Defense University: Military academies War College of the Armed Forces Training and Education Center of the Armed Forces Azerbaijan Higher Military Academy Azerbaijan Higher Naval Academy (former independent institution) Azerbaijan High Military Aviation School (former independent institution) Other educational institutions Secondary Military Medical School of Azerbaijan Military Medical Faculty of Azerbaijan Medical University Military lyceums Jamshid Nakhchivanski Military Lyceum Heydar Aliyev Military Lyceum Conscription Military Justice Military Courts act as courts of first instance deals. The Military Court is composed of a President and judges. The following military courts exist in Azerbaijan: Military Court of Nakhchivan Autonomous Republic Baku Military Court (formed in August 1992) Ganja Military Court Lankaran Military Court Fuzuli-Gubadli Military Court Tartar Military Court Agdam Military Court Gazakh Military Court Sumgait Military Court Women and ethnic minorities in the armed forces During the first war, Russians, who were a large minority in Azerbaijan at the time, served in the units of the Azerbaijani Army, many of whom formerly served in the Soviet Army. According to the Russian Ministry of Defence more than 300 officers of the 7th Army, based in the capital of Baku, refused to leave Azerbaijan at the outset of the war. During the Second Karabakh War, the death of an ethnic Russian Azerbaijani soldier, Dmitry Solntsev, was reported. There was also Denis Aliyev (born as Denis Pronin) from the Xətai raion, who was killed in Jabrayil. He was later posthumously awarded the Medal "For the Liberation of Jabrayil" in December. Cossacks, associated with the Association of Cossacks of Azerbaijan, often join the Azerbaijani Armed Forces. Female military personnel in the military are generally involved in education, office work, medical care, and the development of international cooperation. They also serve in the rear, signal troops, and intelligence forces. Women are exempt from conscription, which means that female service is purely on a voluntary basis. There are currently 1,000 female personnel in the Azerbaijani military, accounting for 3% of the armed forces. During the Karabakh Conflict, 2,000 of the 74,000 Azerbaijani soldiers were women, and 600 of them directly took part in military operations, with a women's battalion being established in 1992. The enrollment of females in Azerbaijani higher military schools began in 1999. According to soldier Tehrana Bahruzi in her book, “Zakir Hasanov: the Ideal Minister", Defence Minister Zakir Hasanov was responsible for launching the first female unit in the Special Forces of Azerbaijan. In October 2020, the first female military casualty was reported, a combat medic who died while taking wounded soldiers from the battlefield. Personnel medals and awards Medal "For Bravery" Medal "For Fatherland" Medal "For Faultless Service" Medal "For blameless service" Medal "For distinction in military service" Medal "For distinction in the border" Medal "For merit in military collaboration" Medal "For military merit" Veteran of the Armed Forces Medal Brave Warrior Medal For Distinction in Battle Medal For Heroism Medal For military services medal Herbi Xidmlete Gore Medal Anniversary medals "10th Anniversary of the Armed Forces of Azerbaijan (1991–2001)" Medal "90th Anniversary of the Armed Forces of Azerbaijan (1918–2008)" Medal "95th Anniversary of the Armed Forces of Azerbaijan (1918–2013)" Medal Azerbaijani Army 100th anniversary medal Battle/war awards Hero of the Patriotic War Hero of the Patriotic War Medal Participant of the Patriotic War Medal For Services in the Rear in the Patriotic War Medal For the Liberation of Aghdam Medal For the Liberation of Fuzuli Medal For the Liberation of Gubadly Medal For the Liberation of Jabrayil Medal For the Liberation of Kalbajar Medal For the Liberation of Khojavend Medal For the Liberation of Lachin Medal For the Liberation of Shusha Medal For the Liberation of Sugovushan Medal For the Liberation of Zangilan Medal Today 'National Hero of Azerbaijan' is the highest national title in the country, awarded for outstanding services of national importance to Azerbaijan in defense, as well as other deeds in other spheres. Traditions and military institutions Military oath The military oath () is taken by conscripts as a legal basis of the beginning of their military service. The oath is administered by the commanding officer of the unit. The following is the text for the current version of the oath: Battle flags and pennants A battle flag for a military unit is a symbol of honor which remains forever in the unit unless it is dissolved. By military law, if the battle flag is lost in battle, the commander of the military unit and the servicemen under its command are brought to court, and the unit is abolished. Battle flags have the color of the State Flag, with the slogan "For Azerbaijan" being embroidered with golden silk on a blue stripe along the upper edge of the fabric. Outside the battle flag, the Azerbaijani military also utilizes the Turkish military tradition of pennants as symbols. Military holidays These are the military holidays observed by all service personnel the Armed Forces: 14 February – Air Force Day 9 May – Victory Day (Great Patriotic War) 26 June – Day of the Armed Forces 5 August – Day of the Azerbaijani Navy 27 September – Memorial Day 18 October – Day of the First Military Unit 8 November – Victory Day Azerbaijan Military History Museum Azerbaijan Military History Museum is a structure under the Ministry of Defense. It was established on 10 December 1992 by the order of the Minister of Defense and in accordance with a decree signed on 29 October 1992 "On the transfer of the Museum of Combat Glory of the VI Army Garrison of the Commonwealth of Independent States". Today, the museum displays 5 tanks, 9 armored personnel carriers, 16 artillery pieces, 6 aircraft, 4 helicopters, 6 different military equipment of the Air Force. Currently, the number of exhibits totals 11,000. Republican Veterans Organization After the Second World War, veterans movements were launched in Azerbaijan, with the Baku Veterans Committee being established on 10 June 1960. The activity of the committee was limited to Baku until the early 1970s. During the leadership of First Secretary Heydar Aliyev, there was a revival in the veteran movement, during which the committee gradually expanded to the republic. The establishment of the Republican Veterans Organization took place on 21 March 1987. Despite the official registration of the RVO with the Ministry of Justice, the activity of the organization was largely formal due to the tensions in the country with the Karabakh War, as well as the attitude of the government towards Red Army veterans in general. One of the first laws signed by the President Aliyev was the Law "On Veterans" (28 June 1994), which restored the mandate for the RVO. See also Judiciary of Azerbaijan Special Purpose Police Unit References Further reading U.S. Army War College Center for Strategic Leadership, Transformation of the Azerbaijani Armed Forces, October 2008 External links Official YouTube Channel of Azerbaijani Soldier program 1918 establishments in Azerbaijan

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https://en.wikipedia.org/wiki/Economy%20of%20Armenia

Economy of Armenia

The economy of Armenia grew by 12.6% in 2022, according to the country's Statistical Committee and the International Monetary Fund. Total output amounted to 8.5 trillion Armenian drams, or $19.5 billion. At the same time, Armenia's foreign trade turnover significantly accelerated in growth from 17.7% in 2021 to 68.6% in 2022. GDP contracted sharply in 2020 by 7.2%, mainly due to the COVID-19 recession and the war against Azerbaijan. In contrast it grew by 7.6 per cent in 2019, the largest recorded growth since 2007, while between 2012 and 2018 GDP grew 40.7%, and key banking indicators like assets and credit exposures almost doubled. While part of the Soviet Union, the economy of Armenia was based largely on industry—chemicals, electronic products, machinery, processed food, synthetic rubber and textiles; it was highly dependent on outside resources. Armenian mines produce copper, zinc, gold and lead. The vast majority of energy is produced with imported fuel from Russia, including gas and nuclear fuel for Armenia's Metsamor nuclear power plant. The main domestic energy source is hydroelectric. Small amounts of coal, gas and petroleum have not yet been developed. The severe trade imbalance has been offset somewhat by international aid, remittances from Armenians abroad, and foreign direct investment. Armenia is a member of the Eurasian Economic Union and ties with Russia remain close, especially in the energy sector. Overview Under the old Soviet central planning system, Armenia had developed a modern industrial sector, supplying machine tools, textiles, and other manufactured goods to sister republics in exchange for raw materials and energy. Since the implosion of the USSR in December 1991, Armenia has switched to small-scale agriculture away from the large agroindustrial complexes of the Soviet era. The agricultural sector has long-term needs for more investment and updated technology. Armenia began borrowing soon after declaring independence. In 2000, Armenian governmental debt reached its greatest level relative to GDP (49.3 percent of GDP). Armenia is a food importer, and its mineral deposits (gold and bauxite) are small. The ongoing conflict with Azerbaijan over the ethnic Armenian-dominated region of Nagorno-Karabakh and the breakup of the centrally directed economic system of the former Soviet Union contributed to a severe economic decline in the early 1990s. Political instability and the threat of war placed a significant strain on economic development. Despite robust growth in recent years, the problem of geopolitical uncertainty resurfaced during the 2020 war, contributing to a 7.2% drop in GDP. Armenia's public debt rose to 67.4% in 2020, but fell below 50% again in 2022. Global competitiveness In the 2020 report of Index of Economic Freedom by Heritage Foundation, Armenia is classified as "mostly free" and ranks 34th, improving by 13 positions and ahead of all other Eurasian Economic Union countries and several EU countries including Cyprus, Bulgaria, Romania, Poland, Belgium, Spain, France, Portugal and Italy. In the 2019 report (data for 2017) of Economic Freedom of the World published by Fraser Institute Armenia ranks 27th (classified most free) out of 162 economies. In the 2019 report of Global Competitiveness Index Armenia ranks 69th out of 141 economies. In the 2020 report (data for 2019) of Doing Business Index Armenia ranks 47th with 10th rank on "starting business" sub-index. In the 2019 report (data for 2018) of Human Development Index by UNDP Armenia ranked 81st and is classified into "high human development" group. In the 2021 report (data for 2020) of Corruption Perceptions Index by Transparency International Armenia ranked 60 of 179 countries. History of the modern Armenian economy At the beginning of the 20th century, the territory of present-day Armenia was an agricultural region with some copper mining and cognac production. From 1914 through 1921, Caucasian Armenia suffered from genocide of about 1.5 million Armenian inhabitants on their own homeland which obviously caused total property and financial collapse when all their assets and belongings were forcibly taken away by the Turks the consequences of which after 105 years to this day remain incalculable, revolution, the influx of refugees from Turkish Armenia, disease, hunger and economic misery. About 200,000 people died in 1919 alone. At that point, only American relief efforts saved Armenia from total collapse. Thus, Armenians went from being one of the wealthiest ethnic groups in the region to suffering from poverty and famine. Armenians were the second richest ethnic group in Anatolia after the Greeks, and they were heavily involved in very high productive sectors such as banking, architecture, and trade. However, after the mass killings of Armenian intellectuals in April 1915 and the genocide targeted towards the whole Armenian population left the people and the country in ruins. The genocide was responsible for the loss of many high-quality skills that the Armenians possessed. The first Soviet Armenian government regulated economic activity stringently, nationalizing all economic enterprises, requisitioning grain from peasants, and suppressing most private market activity. This first experiment of state control ended with the advent of Soviet leader Vladimir Lenin's New Economic Policy (NEP) of 1921–1927. This policy continued state control of the large enterprises and banks, but peasants could market much of their grain, and small businesses could function. In Armenia, the NEP years brought partial recovery from the economic disaster of the post-World War I period. By 1926 agricultural production in Armenia had reached nearly three-quarters of its prewar level. By the end of the 1920s, Stalin's regime had revoked the NEP and re-established the centralised state monopoly on all economic activity. Once this occurred, the main goal of the Soviet economic policy in Armenia was to turn a predominantly agrarian and rural republic into an industrial and urban one. Among other restrictions, peasants now were forced to sell nearly all of their output to state procurement agencies rather than at the open market. From the 1930s through the 1960s, an industrial infrastructure has been constructed. Besides hydroelectric plants and canals, roads were built and gas pipelines were laid to bring fuel and food from Azerbaijan and Russia. The Stalinist command economy, in which market forces were suppressed and all orders for production and distribution came from the state authorities, survived in all its essential features until the fall of the Soviet regime in 1991. In the early stages of the communist economic revolution, Armenia underwent a fundamental transformation into a "proletarian" society. Between 1929 and 1939, the percentage of Armenia's work force categorised as industrial workers grew from 13% to 31%. By 1935 industry supplied 62% of Armenia's economic production. Highly integrated and sheltered within artificial barter economy of the Soviet system from the 1930s until the end of the communist era, the Armenian economy showed few signs of self-sufficiency at any time during that period. In 1988, Armenia produced only 0.9% of the net material product of the Soviet Union (1.2% of industry, 0.7% of agriculture). The republic retained 1.4% of total state budget revenue, delivered 63.7% of its NMP to other republics, and exported only 1.4% of what it produced to markets outside the Soviet Union. Agriculture accounted for only 20% of net material product and 10% of employment before the breakup of the Soviet Union in 1991. Armenia's industry was especially dependent on the Soviet military-industrial complex. About 40% of all enterprises in the republic were devoted to defense, and some factories lost 60% to 80% of their business in the last years of the Soviet Union, when massive cuts were made in the national defense expenditures. As the republic's economy faced the prospects of competing in world markets in the mid 1990s, the great liabilities of Armenia's industry were its outdated equipment and infrastructure and the pollution emitted by many of the country's heavy industrial plants. The economic downturn that began in 1989 worsened dramatically in 1992. According to statistics, the GDP declined by 37.5 percent in 1991 compared to 1990, and all sectors contributing to the GDP decreased in production. The collapse of industry in favor of agriculture, whose products were mostly imported throughout the Soviet period, changed the structure of sectoral contributions to GDP. In 1991, Armenia's last year as a Soviet republic, national income fell 12% from the previous year, while per capita gross national product was 4,920 rubles, only 68% of the Soviet average. In large part due to the earthquake of 1988, the Azerbaijani blockade that began in 1989 and the collapse of the international trading system of the Soviet Union, the Armenian economy of the early 1990s remained far below its 1980 production levels. In the first years of independence (1992–93), inflation was extremely high, productivity and national income dropped dramatically, and the national budget ran large deficits. A period of chronic shortages, was the first stage of price deregulation, which allowed goods to stay in Armenia as opposed to being exported for better prices; the inflation rates were 10 percent in 1990, 100 percent in 1991, and 642.5 percent during the first four months of 1992, compared with the first four months of 1991. Thus, there were two opposing dynamics: price increases in response to shortages and falling incomes due to the recession and unemployment. Post-communist economic reforms Armenia introduced elements of the free market and privatisation into their economic system in the late 1980s, when Mikhail Gorbachev began advocating economic reform. To supply the country's basic needs, the first decision was land reform and the privatization of land. This allowed for the emergence of small-parcel agriculture supplying markets and supporting self-sustenance during the period of shortages. Cooperatives were set up in the service sector, particularly in restaurants, although substantial resistance came from the Communist Party of Armenia (CPA) and other groups that had enjoyed privileged position in the old economy. In the late 1980s, much of Armenia's economy already was opening either semi-officially or illegally, with widespread corruption and bribery. The so-called mafia, made up of interconnected groups of powerful officials and their relatives and friends, sabotaged the efforts of reformers to create a lawful market system. When the December 1988 earthquake brought millions of dollars of foreign aid to the devastated regions of Armenia, much of the money went to corrupt and criminal elements. Beginning in 1991, the democratically elected government pushed vigorously for privatisation and market relations, although its efforts were frustrated by the old ways of doing business in Armenia, the Azerbaijani blockade, and the costs of the First Nagorno-Karabakh War. In 1992, the Law on the Programme of Privatisation and Decentralisation of Incompletely Constructed Facilities established a state privatisation committee, with members from all political parties. In middle 1993, the committee announced a two-year privatisation programme, whose first stage would be privatisation of 30% of state enterprises, mostly services and light industries. The remaining 70%, including many bankrupt, nonfunctional enterprises, were to be privatised in a later stage with a minimum of government restriction, to encourage private initiative. For all enterprises, the workers would receive 20% of their firm's property free of charge; 30% would be distributed to all citizens by means of vouchers; and the remaining 50% was to be distributed by the government, with preference given to members of the labour organisations. A major problem of this system, however, was the lack of supporting legislation covering foreign investment protection, bankruptcy, monopoly policy, and consumer protection. In the first post-communist years, efforts to interest foreign investors in joint enterprises were only moderately successful because of the blockade and the energy shortage. Only in late 1993 was a department of foreign investment established in the Ministry of Economy, to spread information about Armenia's investment opportunities and improve the legal infrastructure for investment activity. A specific goal of this agency was creating a market for scientific and technical intellectual property. A few Armenians living abroad made large-scale investments. Besides a toy factory and construction projects, diaspora Armenians built a cold storage plant (which in its first years had little produce to store) and established the American University of Armenia in Yerevan to teach the techniques necessary to run a market economy. Armenia was admitted to the International Monetary Fund in May 1992 and to the World Bank in September. A year later, the government complained that those organisations were holding back financial assistance and announced its intention to move toward fuller price liberalisation, and the removal of all tariffs, quotas, and restrictions of foreign trade. Although privatisation had slowed because of catastrophic collapse of the economy, Prime Minister Hrant Bagratyan informed the United States officials in the fall of 1993 that plans had been made to embark on a renewed privatisation programme by the end of the year. Like other former states, Armenia's economy suffers from the legacy of a centrally planned economy and the breakdown of former Soviet trading patterns. Soviet investment in and support of Armenian industry has virtually disappeared, so that few major enterprises are still able to function. In addition, the effects of the 1988 earthquake, which killed more than 25,000 people and made 500,000 homeless, are still being felt. Although a cease-fire has held since 1994, the conflict with Azerbaijan over Nagorno-Karabakh has not been resolved. The consequent blockade along both the Azerbaijani and Turkish borders has devastated the economy, because of Armenia's dependence on outside supplies of energy and most raw materials. Land routes through Azerbaijan and Turkey are closed; routes through Georgia and Iran are adequate and reliable. In 1992–93, the GDP had fallen nearly 60% from its 1989 level. The national currency, the dram, suffered hyperinflation for the first few years after its introduction in 1993. Armenia has registered strong economic growth since 1995 and inflation has been negligible for the past several years. New sectors, such as precious stone processing and jewelry making and communication technology (primarily Armentel, which is left from the USSR era and is owned by external investors). This steady economic progress has earned Armenia increasing support from international institutions. The International Monetary Fund (IMF), World Bank, EBRD, as well as other international financial institutions (IFIs) and foreign countries are extending considerable grants and loans. Total loans extended to Armenia since 1993 exceed $800 million. These loans are targeted at reducing the budget deficit, stabilizing the local currency; developing private businesses; energy; the agriculture, food processing, transportation, and health and education sectors; and ongoing rehabilitation work in the earthquake zone. By 1994, however, the Armenian government had launched an ambitious IMF-sponsored economic liberalization program that resulted in positive growth rates in 1995–2005. The economic growth of Armenia expressed in GDP per capita was one of strongest in the CIS. GDP went from $350 to more than $800 on average between 1995 and 2003. Three principal factors explain this result: the credibility of the macroeconomic policies of stabilization, the correction effect following the depression, and the importance of external transfers, in particular since 2000. Armenia became a member of the World Trade Organization (WTO) in January 2003. Armenia also has managed to slash inflation, stabilize its currency, and privatize most small- and medium-sized enterprises. Armenia's unemployment rate, however, remains high, despite strong economic growth. The chronic energy shortages Armenia suffered in the early and mid-1990s have been offset by the energy supplied by one of its nuclear power plants at Metsamor. Armenia is now a net energy exporter, although it does not have sufficient generating capacity to replace the Metsamor nuclear plant, which is under international pressure to close due to its old design. The European Union had classified the VVER 440 Model V230 light-water-cooled reactors as the "oldest and least reliable" category of all the 66 Soviet reactors built in the former Eastern Bloc. However the IAEA has found that the Metsamor NPP has adequate safety and can function beyond its design lifespan. The country's electricity distribution system was privatized in 2002. Outperforming GDP growth According to official preliminary data GDP grew by 7.6 per cent in 2019, largest recording growth since 2008. Nominal GDP per capita was approximately $4,196 in 2018 and is expected to reach $8,283 in 2023, surpassing neighbouring Azerbaijan and Georgia. With 8.3% Armenia recorded highest degree of GDP growth among Eurasian Economic Union countries in 2018 January–June against the same period of 2017. Earlier, the economy of Armenia grew by 7.5% in 2017 and reached a nominal GDP of $11.5 billion per annum, while per capita figure grew by 10.1% and reached $3880. With 7.29% Armenia was second best in GDP per capita growth terms in Europe and Central Asia in 2017. Armenian GDP PPP (measured in current international dollar) grew total of 316% per capita in the years 2000-2017 becoming 6th best worldwide in these terms. GDP grew 40.7% between 2012 and 2018, and key banking indicators like assets and credit exposures almost doubled. 2020 recession The Armenian economy performed poorly in 2020, and contracted by 7.2% after years of consecutive growth. The two biggest contributing factors were the COVID-19 recession and the Second Nagorno-Karabakh War. In the first half of 2020, the Armenian economy was negatively impacted by the economic restrictions that were implemented in response to the COVID-19 pandemic. These restrictions included a stay-at-home order, an indoor social distancing requirement, and a mask mandate. These restrictions had a negative impact on businesses; according to the World Bank, individual consumption dropped by 9% in the first six months of 2020 due to the stay-at-home order. The economy was further impacted by the war against Azerbaijan later in the year. Early in the war, the central government mobilized the country by converting private businesses into public ones, producing masks and military equipment. During this time, many factories were converted from private-use to public, which further negatively impacted the nation's economic output. Main sectors of economy Agricultural sector Armenia produced in 2018: 415 thousand tons of potato; 199 thousand tons of vegetable; 187 thousand tons of wheat; 179 thousand tons of grape; 138 thousand tons of tomato; 126 thousand tons of watermelon; 124 thousand tons of barley; 109 thousand tons of apple; 104 thousand tons of apricot (12th largest world producer);; 89 thousand tons of cabbage; 54 thousand tons of sugar beet; 52 thousand tons of peach; 50 thousand tons of cucumber; 39 thousand tons of onion; In addition to smaller productions of other agricultural products. As of 2010, the agricultural production comprises on average 25 percent of Armenia's GDP. In 2006, the agricultural sector accounted for about 20 percent of Armenia's GDP. Armenia's agricultural output dropped by 17.9 percent in the period of January–September 2010. This was owing to bad weather, a lack of a government stimulus package, and the continuing effects of decreased agricultural subsidies by the Armenian government (per WTO requirements). In addition, the share of agriculture in Armenia's GDP hovered around 17.9% until 2012 according to the World Bank. Then already in 2013 the share of it was a bit higher comprising 18.43%. Afterwards a declining trend was registered in the period of 2013-2017 reaching to around 14.90% in 2017. By comparing the share of agriculture as a component of GDP with the neighboring countries (Georgia, Azerbaijan, Turkey, Iran) one can notice that the percentage is highest for Armenia. As of 2017 the contribution of agriculture to the GDP for the neighboring countries was 6.88, 5.63, 6.08 and 9.05 respectively. In 2022, the industry with the highest number of companies registered in Armenia is Services with 1,907 companies followed by Wholesale Trade and Manufacturing with 510 and 408 companies respectively. Mining In 2017, mining industry output with grew by 14.2% to 172 billion AMD at current prices and run at 3.1% of Armenia's GDP. In 2017, mineral product (without precious metals and stones) exports grew by 46.9% and run at US$692 million, which comprised 30.1% of all exports. Construction sector Real estate transactions count grew by 36% in September 2019 compared to September 2018. Also, the average market value of one square meter of housing in apartment buildings in Yerevan in September 2019 grew by 10.8% from September 2018. In 2017, construction output increased by 2.2% reaching 416 billion AMD. Armenia experienced a construction boom during the latter part of the 2000s. According to the National Statistical Service, Armenia's booming construction sector generated about 20 percent of Armenia's GDP during the first eight months of 2007. According to a World Bank official, 30 percent of Armenia's economy in 2009 came from the construction sector. However, during the January to September 2010 period, the sector experienced a 5.2 percent year-on-year decrease, which according to the Civilitas Foundation is an indication of the unsustainability of a sector based on an elite market, with few products for the median or low budgets. This decrease comes despite the fact that an important component of the government stimulus package was to support the completion of ongoing construction projects. Energy In 2017, electricity generation increased by 6.1% reaching 7.8 billion KWh. Digital economy The digital economy is a branch of the economy based on digital computing technologies. The digital economy is sometimes referred to as the Internet economy or the web economy. The digital economy is often intertwined with the traditional economy, making it difficult to distinguish between them. Aimed at the sector's development on November 15, 2021, the Silicon Mountains Summit dedicated to introducing intelligent solutions in the economy was held in Yerevan. The main topic of the summit was the prospect of digitalization of the economy in Armenia. The main driving force of this sphere in Armenia is the banks. Digital transformation is a necessity for banks and financial institutions. At the moment, ACBA Bank is the leader․ Industrial sector In 2017, industrial output increased by 12.6% annually reaching 1661 billion AMD. Industrial output was relatively positive throughout 2010, with year-on-year average growth of 10.9 percent in the period January to September 2010, due largely to the mining sector where higher global demand for commodities led to higher prices. According to the National Statistical Service, during the January–August 2007 period, Armenia's industrial sector was the single largest contributor to the country's GDP, but remained largely stagnant with industrial output increasing only by 1.7 percent per year. In 2005, Armenia's industrial output (including electricity) made up about 30 percent of GDP. Services sector In the 2000s, along with the construction sector, the services sector was the driving force behind Armenia's recent high economic growth rate. Between 2017 and 2019, Armenia's economy increased fast, with annual rate of GDP growth averaging 6.8 percent. Following the political realignment of 2018, prudent macroeconomic policy helped develop a track record of macroeconomic stability and an enhanced business environment. In Armenia, the service sector in 2020 reduced volumes by 14.7%, against 15% growth a year earlier, amounting to 1.7 trillion drams ($3.5 billion). According to the Statistical Committee, a negative trend was recorded in all service segments except finance, as well as information and communication. Retail trade In 2010, retail trade turnover was largely unaltered compared to 2009. The existing monopolies throughout the retail sector have made the sector non-responsive to the crisis and resulted in near zero growth. The aftermath of the crisis has started to shift the structure in the retail sector in favor of food products. Nowadays(2019), Armenia has improved standards of living and growing income, which brought to the improvement of retail sector in Armenia. retail sector has the highest employment level. While the sector improves, currently the major sector is still in Yerevan, and not in the other cities of Armenia. The development that happened in this sector was the opening of Dalma Garden Mall, and later Yerevan mall, Rio mall and Rossia mall, which dramatically increased the quality of retail in Yerevan. Currently there is a new development, as in Gyumri there is a new mall opened called Shirak Mall. Another reason for the development of the retail is the development that happened in the banking industry. Today people can easily get financial assistance from the banks right to their credit cards, without visiting the bank. Information and Communication Technologies As of February 2019 nearly 23 thousand employees were counted in ICT sector. With 404 thousand AMD they enjoyed highest pay rate among surveyed sectors of economy. Average salaries in pure IT sector (excluding communications sub-sector) stood at 582 thousand AMD. Financial Services In January 2019 there were 20.5 thousand employees registered in the financial sector. According to Moody's, robust economic growth will benefit banks with GDP growth remaining robust at around 4.5% in 2019–20. Industry report on banking sector prepared by AmRating presents slightly varying figures for some of above data. Tourism Tourism in Armenia has been a key sector to the Armenian economy since the 1990s when tourist numbers exceeded half a million people visiting the country every year (mostly ethnic Armenians from the Diaspora). The Armenian Ministry of Economy reports that most international tourists come from Russia, EU states, the United States and Iran. Though relatively small in size, Armenia has four UNESCO world heritage sites. Despite internal and external problems, the number of incoming tourists has been continually increasing. 2018 saw a record high of over 1.6 million inbound tourists. In 2018, receipts from international tourism amounted to $1.2 billion, nearly twice the value for 2010. In per capita terms these stood at $413, ahead of Turkey and Azerbaijan, but behind Georgia. In 2019, the largest growth at 27.2% was shown by accommodation and catering sector, which came as a result of the growth of tourist flows. Financial system Foreign debt The amount of interest paid on the public debt rose significantly (from AMD 11 billion in 2008 to AMD 46.5 billion in 2013), as did the amount of principle repayments (from annual repayments of US$15–16 million in 2005-2008 exceeding US$150 million in 2013). This is a significant financial load on the state budget. Because of additional borrowings and lower concessionality of new loans, the burden might rise in the future years. In 2019, the Armenian government planned to obtain about $490 million in fresh loans rising public debt to about $7.5 billion. Just over $6.9 billion of that would be the government's debt. After reaching nearly 60.0 per cent of GDP, the public debt to GDP ratio decreased by approximately three percentage points in 2018 compared with a year before and stood at 55.7 per cent at the end of 2018. The government's public debt at the end of 2019 stood at $6.94 billion, making 50.3% of its GDP. In March 2019, sovereign debt comprised $5488 million, $86.5 million (about 2%) less than a year ago. Other sources quote Armenia's debt at $10.8 billion in September 2018, possibly including non-public debt too. In 2018, debt-to-GDP ratio stood at 55.7% down from 58.7% in 2017. Armenia revised the country's fiscal rules in 2018, setting a permissible threshold for public debt in the amount of 40, 50 and 60% of GDP. At the same time, it established that in case of force majeure situations such as natural disasters, wars, the government will be allowed to exceed this threshold. The debt rose by $863.5 million in 2016 and by another $832.5 million in 2017. It totalled just $1.9 billion before the 2008-2009 (13.5% of GDP) global financial crisis that plunged the county into a severe recession. Exchange rate of national currency National Statistics Office publishes official reference exchange rates for each year. Inflation For 2023, the IMF forecasts inflation at 3.5%, which is below most neighbouring countries. The Armenian government projects inflation at 2.7% in 2019. The inflation rate in Armenia in 2020 was 1.21 percent, a 0.23 percent decrease over 2019, in 2019 was 1.44 percent, a 1.08 percent decrease over 2018, in 2018 was 2.52 percent, up 1.55 percent from 2017 and in 2017 was 0.97 percent, a 2.37 percent rise from 2016. Cash remittances Cash remittances sent back home from Armenians working abroad — mostly in Russia and the United States — contribute significantly to Armenia's Gross Domestic Product making up 14% of GDP in 2018. They help Armenia sustain double-digit economic growth and finance its massive trade deficit. In 2008, transfers reached record high of $2.3 billion. In 2015, they reached 10-year low at $1.6 billion. In 2018, they run at round $1.8 billion. $0.8 billion were transferred in first half of 2019. According to CBA their impact on economy is decreasing, as GDP grows at outperforming rate. Net private transfers decreased in 2009, but saw a continuous increase during the first six months of 2010. Since private transfers from the Diaspora tend to be mostly injected into consumption of imports and not in high value-added sectors, the transfers have not resulted in sizeable increases in productivity. According to the Central Bank of Armenia, during the first half of 2008, cash remittances sent back to Armenia by Armenians working abroad rose by 57.5 percent and totaled US$668.6 million, equivalent to 15 percent of the country's first-half Gross Domestic Product. However, the latter figures only represent cash remittances processed through Armenian commercial banks. According to RFE/RL, comparable sums are believed to be transferred through non-bank systems, implying that cash remittances make up approximately 30 percent of Armenia's GDP in the first half of 2008. In 2007, cash remittances through bank transfers rose by 37 percent to a record-high level of US$1.32 billion. According to the Central Bank of Armenia, in 2005, cash remittances from Armenians working abroad reached a record-high level of $1 billion, which is worth more than one fifth of the country's 2005 GDP. Banking The central bank has set additional capital buffers in the banking sector. In force since April 2019, the regulator set three buffers exceeding the current capital adequacy requirement compliant with the Basel III regulation: a capital conservation buffer, a counter-cyclical capital buffer and a systemic risk buffer. Full implementation of the buffers over the course of the next few years will strengthen the financial sector's resistance to economic shocks and help increase the efficiency of macroprudential policies. Armenian banks' lending grew by 10 percent in 2019. Microfinance The establishment of Microfinance Institutions in Armenia was dependent on them making a complementary effort to fill the gap in the financial services sector. Its primary goal was to deal with the rising unemployment and poverty brought on by transitory shock. In this context, self-employment in the country emerged as one of the best options to unemployment. Commercial banking institutions in Armenia overlooked micro-business enterprises that lacked credit histories and sufficient funding. Microfinance has been proposed as an adaptable instrument to assist people in transition economies take advantage of new opportunities. Government revenues and taxation Government revenues In August 2019 Moody's Investors Service upgraded Armenia to Ba3 rating with stable outlook. According to the National Statistical Service, Armenia's government debt stood at AMD 3.1 trillion (about $6,4 billion, including $5,1 billion of external debt) as of November 30, 2017. Armenia's debt-to-GDP ratio will drop by 1% in 2018 according to finance minister. In Armenia's external debt ($5.5 billion as of January 1, 2018), the arrears for multi-country credit programs dominate - 66.2% or $3.6 billion, followed by debt on bilateral loan programs - 17.5% or $958.9 million and investments of non-residents in Armenian Eurobonds - 15,4% or $844.9 million. For the whole Armenian economy and international commerce, 2020 was a year of decline. In a variety of areas, Armenian commodities are being exported and imported at a lower rate. According to the Armenian Statistical Committee, Armenia exported goods worth $2.544 billion in 2020, a fall of 3.9 percent from 2019. Armenia imported items worth 4.559 billion dollars in 2020, down 17.7% from the previous year.The volume of Armenia's international trade has varied throughout the previous 10 years. Taxation Employee income tax From January 1, 2020, Armenia will switch to a flat income taxation system, which, regardless of the amount will tax wages at 23%. Moreover, until 2023 the taxation rate will gradually decrease from 23% to 20%. Corporate income tax The reform adopted in June 2019, aims to boost medium-term economic activity and to increase tax compliance. Among other measures, the corporate income tax was reduced by two percentage points to 18.0 per cent and the tax on dividends for non-resident organisations halved to 5.0 per cent. Special taxation for small business From January 1, 2020, the republic will abandon two alternative tax systems - self-employed and family entrepreneurship. They will be replaced by micro-entrepreneurship with a non-taxable threshold of up to 24 million drams. Business entities that carry out specialized activities, in particular, accounting, advocacy, and consulting will not be considered as micro-business entities. Micro business will be exempted from all types of taxes other than income tax, which will be 5 thousand drams per employee. Value-added tax Over half of the tax revenues in the January–August 2008 time period were generated from value-added taxes (VAT) of 20%. By comparison, corporate profit tax generated less than 16 percent of the revenues. This suggests that tax collection in Armenia is improving at the expense of ordinary citizens, rather than wealthy citizens (who have been the main beneficiaries of Armenia's double-digit economic growth in recent years). VAT (Value Added Tax): In Armenia, VAT-paying individuals subtract the VAT paid on their inputs from the VAT levied on their sales and account to the tax authorities for the difference. The standard rate of VAT on domestic sales of goods and services, as well as imports importation, is 20%. Exports of products and services are not taxed. Foreign trade, direct investments and aid Foreign trade Exports According to the National Statistical Committee, in 2018, exports amounted to $2.411.9 billion, having grown by 7.8% from the previous year. After a boom of almost 93% in 2022, the IMF expects exports of goods and services to grow by 22% in 2023 and 8% in 2024. The goods export structure changed considerably in 2018 as the export of the traditional mining sector decreased while the share of textiles, agriculture and precious metals increased. Geographical location of the country and relatively low electricity costs are comparative advantages supporting to boost the production of the textile and leather products in Armenia. Proximity to Europe in comparison with manufacturers in East Asia creates opportunity to strengthen Armenia's position as contract manufacturing destination for European brands. Foreign companies that put orders to Armenian companies are mainly famous European brands, particularly, from Italy (La Perla, SARTIS, VERSACE etc.) and Germany (LEBEK International Fashion, KUBLER Bekliedungswerk). With the Armenia's entry into Eurasian Economic Commission, the opportunity to increase its presence with textile and leather production raised also in the countries of Eurasian Economic Commission as no customs duty applies to Armenian products in the export markets within the customs union. According to the study REGIONAL AND INTERNATIONAL TRADE OF ARMENIA: PERSPECTIVES AND POTENTIALS authors investigated the trade potential of Armenia for different product groups by employing a gravity model of trade approach. The study explored Armenia's trade flows to 139 countries for the period of 2003 to 2007. According to the results of the paper, the authors concluded that "Armenia has exceeded its export potential almost with all the CIS countries". In addition, the authors concluded that the most perspective product groups of Armenian export tend to be "Industrial products", "Food and beverages" and "Consumer goods". On the other hand, the paper “The effects of exchange rate volatility on exports: evidence from Armenia” analyzes the effect of Armenian floating exchange rate regime and exchange rate volatility on Armenian exports to Russia. According to the paper exchange rate volatility has long-run and short-run negative effects on exports. Moreover, authors stated that high exchange rate risk resulted in decreasing exports to Russia. According to most recent (2019 Jan-Feb compared to 2018 Jan-Feb) ArmStat calculations, biggest growth in export quantities was measured towards Turkmenistan by 23.6 times (from $37K to $912K), Estonia by 15 times (from $8.4K to $136.5K) and Canada by 11.5 times (from $623K to $7.8 mln). Meanwhile, exports to Russia, Germany, USA and UAE dropped. Imports In 2017, Armenia imported $3.96B, making it the 133rd largest importer in the world. During the last five years the imports of Armenia have decreased at an annualized rate of -1.2%, from $3.82B in 2012 to $3.96B in 2017. The most recent imports are led by Petroleum Gas which represent 8.21% of the total imports of Armenia, followed by Refined Petroleum, which account for 5.46%. Armenia's main imports are oil, natural gas, cereals, rubber manufactures, cork and wood, and electrical machinery. Armenia's main imports partners are Russia, China, Ukraine, Iran, Germany, Italy, Turkey, France and Japan. The European Union (28.7% of total exports), Russia (26.9%), Switzerland (14.1%), and Iraq (14.1%) are Armenia's largest export partners (6.3 percent ). The Russian Federation is the most important import partner (26.2%), followed by the EU (22.6%), China (13.8%), and Iran (13.8%). (5.6 percent ). After the 2008 Russian-Georgian conflict, which briefly halted the nation's hydrocarbon supply and exposed the country's energy vulnerabilities, the country has been looking for other energy sources. Tensions with its neighbors, notably Azerbaijan and Turkey, continue to exist, affecting commerce. Armenia's ties to Russia, as well as its membership in the Eurasian Economic Union, constrain the country's potential to integrate further with the EU. Imports in 2017 amounted to $4.183 billion, up 27.8% from 2016. In 2018, the country's structural trade imbalance was predicted to be 15.7 percent of GDP (World Bank). According to World Trade Organization data, Armenia exported commodities worth US$2.4 billion in 2018, up 7% from the previous year, and imported goods worth US$4.9 billion, up 18%. In terms of services, the country exported US$2 billion in 2018 and imported US$2.1 billion. The global economic crisis has had less impact on imports because the sector is more diversified than exports. In the first nine months of 2010, imports grew about 19 percent, just about equal to the decline of the same sector in 2009. Deficit According to the National Statistical Service foreign trade deficit amounted to US$1.94 billion in 2017. The current account deficit represented 2.4 percent of GDP in 2017 and increased up to 8.1 percent of GDP during the first three quarters of 2018. This was a result of about 8 percent increase in goods export and 21 percent increase on goods import in nominal terms year on year in 2018. Armenia's foreign trade turnover increased by 11.6 percent in January–May 2021, compared to an 11.2 percent decline a year earlier, owing to a reversal of the y-o-y dynamics of exports and imports from 8.1 to 12.8 percent decline to 20.8-6.7 percent growth, according to preliminary data from the RA Statistical Committee. As a consequence, Armenia's foreign trade turnover reached 1.5 trillion drams ($2.9 billion), with exports totaling 567.4 billion drams ($1.1 billion) and imports being 931.8 billion drams ($1.8 billion), resulting in a 364.4 billion drams ($695 million) international trade deficit. Foreign trade turnover climbed by 3.9 percent in May 2021,resulting to a 7.9% increase in exports and a minimal 1.5 percent increase in imports. As a consequence, Armenia's international trade deficit in May 2021 was 83.4 billion drams ($160 million), decreasing 7.4% from the same month in 2020. (by 21.1 percent ). Foreign trade turnover increased by 13% year over year in May 2020, due to a 30.7 percent increase in exports and a moderate 4.3 percent increase in imports. Partners European Union In 2022, Armenia's bilateral trade with the EU topped $2.3 billion, making the EU one of Armenia's biggest and most important economic partners. EU-Armenia trade increased by 15% in 2018 reaching a total value of €1.1 billion. In 2017, EU countries accounted for 24.3 percent of Armenia's foreign trade. Whereby exports to EU countries grew by 32,2% to $633 million. In 2010, EU countries accounted for 32.1 percent of Armenia's foreign trade. Germany is Armenia's largest trading partner among EU member states, accounting for 7.2 percent of trade; this is due largely to mining exports. Armenian exports to EU countries have skyrocketed by 65.9 percent, making up more than half of all 2010 January to September exports. Imports from EU countries increased by 17.1 percent, constituting 22.5 percent of all imports. During January–February 2007, Armenia's trade with the European Union totaled $200 million. During the first 11 months of 2006, the European Union remained Armenia's largest trading partner, accounting for 34.4 percent of its $2.85 billion commercial exchange during the 11-month period. Russia and former Soviet republics In the first quarter of 2019, share of Russia in foreign trade turnover fell to 11% from 29% from the previous year. 2017 CIS countries accounted for 30 percent of Armenia's foreign trade. Exports to CIS countries rose by 40,3% to $579,5 million. Bilateral trade with Russia stood at more than $700 million for the first nine months of 2010 – on track to rebound to $1 billion mark first reached in 2008 prior to the global economic crisis. During January–February 2007, Armenia's trade with Russia and other former Soviet republics was $205.6 million (double the amount from the same period the previous year), making them the country's number one trading partner. During the first 11 months of 2006, the volume of Armenia's trade with Russia was $376.8 million or 13.2 percent of the total commercial exchange. China In 2017, trade with China grew by 33.3 percent. As of early 2011, trade with China is dominated by imports of Chinese goods and accounts for about 10 percent of Armenia's foreign trade. The volume of Chinese-Armenian trade soared by 55 percent to $390 million in January–November 2010. Armenian exports to China, though still modest in absolute terms, nearly doubled in that period. Iran Armenia's trade with Iran grew significantly from 2015 and 2020. Because Armenia's land borders to the east and west have been closed by the governments of Turkey and Azerbaijan, domestic firms have looked to Iran as a key economic partner. In 2020, trade between the countries exceeded $300 million. The number of Iranian tourists has risen in recent years, with an estimated 80,000 Iranian tourists in 2010. In January 2021, Iran's finance minister Farhad Dejpasand said that trade between the two countries could reach $1 billion annually as Iran looks to become a regional economic force. United States From January–September 2010, bilateral trade with the United States measured approximately $150 million, on track for about a 30 percent increase over 2009. An increase in Armenia's exports to the US in 2009 and 2010 has been due to shipments of aluminum foil. During the first 11 months of 2006, U.S.-Armenian trade totaled $152.6 million. Georgia The volume of Georgian-Armenian trade remains modest in both relative and absolute terms. According to official Armenian statistics, it rose by 11 percent to $91.6 million in January–November 2010. The figure was equivalent to just over 2 percent of Armenia's overall foreign trade. Turkey In 2019, the volume of bilateral trade with Turkey was about $255 million, with trade taking place across Georgian territory. This figure is not expected to increase significantly so long as the land border between the Armenia and Turkey remains closed. Foreign direct investments Foreign Direct Investment (FDI) into Armenia decreased by US$2.7 million in December 2020, compared to a reduction of US$10.3 million the previous quarter. Armenia Foreign Direct Investment: USD mn Net Flows data is available from March 1993 through December 2020, and is updated quarterly. The statistics ranged from a high of US$425.9 million in December 2008 to a low of -67.6 USD mn in December 2014. Armenia's current account surplus is US$51.7 million in December 2020, according to the most recent statistics. -In June 2021, Armenian Direct Investment Abroad increased by 12.8 million dollars. -In June 2021, it boosted its Foreign Portfolio Investment by $14.6 million. -In December 2020, the country's nominal GDP was reported to be 3.8 billion dollars. Yearly FDI figures Despite robust economic growth foreign direct investment (FDI) in Armenia remain low as of 2018. in January–September 2019, the net flow of direct foreign investment in the real sector of the Armenian economy stood at about $267 million. Jersey was the main source of FDI in 2017. Moreover, combined net FDI from all other sources was negative, indicating capital outflow. The tax haven Jersey is home to an Anglo-American company, Lydian International, which is currently building a controversial massive gold mine in the southeastern Vayots Dzor province. Lydian has pledged to invest a total of $370 million in the Amulsar gold mine. Negative values indicate investments of Armenian corporations to foreign country exceeding investments from that country in Armenia. Stock FDI FDI stock to GDP ratio grew continuously during 2014-2016 and reached 44.1% in 2016, surpassing average figures for Commonwealth of Independent States countries, transition economies and the world. By the end of 2017 stock net FDI (for the period 1988–2017) reached 1824 billion AMD, while gross flow of FDI for the same period reached 3869 billion AMD. As of February 2019, the European Investment Bank (EIB) has invested about 380 million euros in the various projects implemented in Armenia. FDI in founding capital of financial institutions During the sector consolidation process in 2014-2017 the share of foreign capital in the authorized capital of the Armenian commercial banks decreased from 74,6% to 61,8%. Net FDI in founding capital of financial institutions accumulated by end of September 2017 is presented in pie chart below. Foreign aid United States The Armenian government receives foreign aid from the government of the United States through the United States Agency for International Development and the Millennium Challenge Corporation. On March 27, 2006, the Millennium Challenge Corporation signed a five-year, $235.65 million compact with the Government of Armenia. The single stated goal of the "Armenian Compact" is "the reduction of rural poverty through a sustainable increase in the economic performance of the agricultural sector." The compact includes a $67 million to rehabilitate up to 943 kilometers of rural roads, more than a third of Armenia's proposed "Lifeline road network". The Compact also includes a $146 million project to increase the productivity of approximately 250,000 farm households through improved water supply, higher yields, higher-value crops, and a more competitive agricultural sector. In 2010, the volume of US assistance to Armenia remained near 2009 levels; however, longer-term decline continued. The original Millennium Challenge Account commitment for $235 million had been reduced to about $175 million due to Armenia's poor governance record. Thus, the MCC would not complete road construction. Instead, the irrigated agriculture project was headed for completion with apparently no prospects for extension beyond 2011. On May 8, 2019, conditioned with the political events in Armenia since April 2018, United States Agency for International Development signed an extension of U.S.-Armenia bilateral agreement in the area of governance and public administration, which would add additional US$8.5 million to the agreement. By signing another document on the same day, USAID increased the aid by additional US$7.5 million in support for more competitive and diversified private sector in Armenia. The financial allocations will be directed to the financing of the USAID-funded project in infrastructures, agriculture, tourism․ After the signing of the new bilateral agreements, the total amount of the U.S. grants to Armenia amounted to around US$81 million. European Union According to the agreement signed in 2020 EU will provide Armenia with 65 million euros for implementation of three programs in such areas as energy efficiency, environment and community development and formation of tools for implementation of the Comprehensive and Enhanced Partnership Agreement. With curtailment of the MCC funding, the European Union may replace the US as Armenia's chief source of foreign aid for the first time since independence. From 2011 to 2013, the European Union is expected to advance at least €157.3 million ($208 million) in aid to Armenia. Domestic business environment Since transition of power to new leadership in 2018 Armenian government works on improving domestic business environment. Numerous formerly privileged business are now required to pay taxes and officially register all workers. Mainly due to this there were 9.7% more payroll employees registered in January 2019 as compared to January 2018. In April 2019 Armenian parliament approved reforms of management of joint stock companies effectively enacting a blocking minority shareholders stake of 25% to cope with shareholder oppression. Following the advice of economic advisers who cautioned Armenia's leadership against the consolidation of economic power in the hands of a few, in January 2001, the Government of Armenia established the State Commission for the Protection of Economic Competition. Its members cannot be dismissed by the government. Foreign trade facilitation In June 2011, Armenia adopted a Law on Free Economic Zones (FEZ), and developed several key regulations at the end of 2011 to attract foreign investments into FEZs: exemptions from VAT (value added tax), profit tax, customs duties, and property tax. The “Alliance” FEZ was opened in August 2013, and currently has nine businesses taking advantage of its facilities. The focus of “Alliance” FEZ is on high-tech industries which include information and communication technologies, electronics, pharmaceuticals and biotechnology, architecture and engineering, industrial design and alternative energy. In 2014, the government expanded operations in the Alliance FEZ to include industrial production as long as there is no similar production already occurring in Armenia. In 2015, another “Meridian” FEZ, focused on jewelry production, watch-making, and diamond-cutting opened in Yerevan, with six businesses operating in it. The investment programs for these companies must still be approved by government. The Armenian Government approved the program to construct the Meghri free economic zone at the border with Iran, which is expected to open in 2017. Controversial issues Monopolies Major monopolies in Armenia include: Natural gas import and distribution, held by Gazprom Armenia, formerly named ArmRosGazprom (controlled by Russian monopoly Gazprom) Armenia's railway, South Caucasus Railway, owned by Russian Railways (RZD) Electricity transmission and distribution (see Electricity sector in Armenia) Newspaper distribution, held by Haymamul Former notable monopolies in Armenia : Wireless (mobile) telephony, held by Armentel until 2004 Internet access, held by Armentel until September 2006 Fixed-line telephony, held by Armentel until August 2007 Assumed (unofficial) monopolies until 2018 velvet revolution: Oil import and distribution (claimed by Armenian opposition parties to belonging to a handful of government-linked individuals, one of which - "Mika Limited" - is owned by Mikhail Baghdasarian, while the other - "Flash" - is owned by Barsegh Beglarian, a "prominent representative of the Karabakh clan") Aviation kerosene (supplying to Zvartnots airport), held by Mika Limited Various basic foodstuffs such as rice, sugar, wheat, cooking oil and butter (the Salex Group enjoys a de facto monopoly on imports of wheat, sugar, flour, butter and cooking oil. Its owner was a parliament deputy Samvel Aleksanian (a.k.a. "Lfik Samo") and close to the country's leadership.). According to one analyst, Armenia's economic system in 2008 was anticompetitive due to the structure of the economy being a type of "monopoly or oligopoly". "The result is the prices with us do not drop even if they do on international market, or they do quite belated and not to the size of the international market." According to 2008 estimate of a former prime minister, Hrant Bagratyan, 55 percent of Armenia's GDP is controlled by 44 families. In early 2008, the State Commission for the Protection of Economic Competition named 60 companies having "dominant positions" in Armenia. In October 2009, when visiting Yerevan, the World Bank’s managing director, Ngozi Okonjo-Iweala, warned that Armenia will not reach a higher level of development unless its leadership changes the "oligopolistic" structure of the national economy, bolsters the rule of law and shows "zero tolerance" towards corruption. "I think you can only go so far with this economic model," Ngozi Okonjo-Iweala told a news conference in Yerevan. "Armenia is a lower middle-income country. If it wants to become a high-income or upper middle-income country, it can not do so with this kind of economic structure. That is clear." She also called for a sweeping reform of tax and customs administration, the creation of a "strong and independent judicial system" as well as a tough fight against government corruption. The warning was echoed by the International Monetary Fund. Takeover of Armenian industrial property by the Russian state and Russian companies Since 2000, the Russian state has acquired several key assets in the energy sector and Soviet-era industrial plants. Property-for-debt or equity-for-debt swaps (acquiring ownership by simply writing off the Armenian government's debts to Russia) are usually the method of acquiring assets. The failure of market reforms, clan-based economics, and official corruption in Armenia have allowed the success of this process. In August 2002, the Armenian government sold an 80 percent stake in the Armenian Electricity Network (AEN) to Midland Resources, a British offshore-registered firm which is said to have close Russian connections. In September 2002, the Armenian government handed over Armenia's largest cement factory to the Russian ITERA gas exporter in payment for its $10 million debt for past gas deliveries. On November 5, 2002, Armenia transferred control of 5 state enterprises to Russia in an assets-for-debts transaction which settled $100 million of Armenian state debts to Russia. The document was signed for Russia by Prime Minister Mikhail Kasyanov and Industry Minister Ilya Klebanov, while Prime Minister Andranik Markarian and National Security Council Secretary Serge Sarkisian signed for Armenia. The five enterprises which passed to 100 percent Russian state ownership are: Armenia's largest thermal gas-burning power plant, which is in the town of Hrazdan "Mars" — electronics and robotics plant in Yerevan, a Soviet-era flagship for both civilian and military production three research-and-production enterprises — for mathematical machines, for the study of materials, and for automated control equipment — these being Soviet-era military-industrial plants In January 2003, the Armenian government and United Company RUSAL signed an investment cooperation agreement, under which United Company RUSAL (which already owned a 76% stake) acquired the Armenian government's remaining 26% share of RUSAL ARMENAL aluminum foil mill, giving RUSAL 100% ownership of RUSAL ARMENAL. On November 1, 2006, the Armenian government handed de facto control of the Iran-Armenia gas pipeline to Russian company Gazprom and increased Gazprom's stake in the Russian-Armenian company ArmRosGazprom from 45% to 58% by approving an additional issue of shares worth $119 million. This left the Armenian government with a 32% stake in ArmRosGazprom. The transaction will also help finance ArmRosGazprom's acquisition of the Hrazdan electricity generating plant’s fifth power bloc (Hrazdan-5), the leading unit in the country. In October 2008 the Russian bank Gazprombank, the banking arm of Gazprom, acquired 100 percent of Armenian bank Areximbank after previously buying 80 percent of said bank in November 2007 and 94.15 percent in July of the same year. In December 2017 government transferred natural gas distribution networks in cities Meghri and Agarak to Gazprom Armenia for cost-free use. Construction of these was funded by foreign aid and costed about 1.3 billion AMD. Non-transparent deals Critics of the Robert Kocharyan government (in office until 2008) say that the Armenian administration never considered alternative ways of settling the Russian debts. According to economist Eduard Aghajanov, Armenia could have repaid them with low-interest loans from other, presumably Western sources, or with some of its hard currency reserves which then totaled about $450 million. Furthermore, Aghajanov points to the Armenian government's failure to eliminate widespread corruption and mismanagement in the energy sector – abuses that cost Armenia at least $50 million in losses each year, according to one estimate. Political observers say that Armenia's economic cooperation with Russia has been one of the least transparent areas of the Armenian government's work. The debt arrangements have been personally negotiated by (then) Defense Minister (and later President) Serge Sarkisian, initially Kocharyan's closest political associate. Other top government officials, including former Prime Minister Andranik Markarian, had little say on the issue. Furthermore, all of the controversial agreements have been announced after Sarkisian's frequent trips to Moscow, without prior public discussion. Finally, while Armenia is not the only ex-Soviet state that has incurred multi-million-dollar debts to Russia over the past decades, it is the only state to have so far given up such a large share of its economic infrastructure to Russia. For example, pro-Western Ukraine and Georgia (both of which owe Russia more than Armenia) have managed to reschedule repayment of their debts. Transportation routes and energy lines Internal Since early 2008, Armenia's entire rail network is managed by the Russian state railway under brand South Caucasus Railways. Metros Yerevan Metro was launched in 1981. It serves 11 active stations. Buses Yerevan Central Bus Station, also known as Kilikia Bus Station, is Yerevan's primary bus terminal, linking buses to both domestic and foreign destinations. Roadways Total length: 8,140 km, World ranking: 112 (7,700 km paved including 1561 km of expressways). Through Georgia Russian natural gas reaches Armenia via a pipeline through Georgia. The only operational rail link into Armenia is from Georgia. During Soviet times, Armenia's rail network connected to Russia's via Georgia through Abkhazia along the Black Sea. However, the rail link between Abkhazia and other Georgian regions has been closed for a number of years, forcing Armenia to receive rail cars laden with cargo only through the relatively expensive rail-ferry services operating between Georgian and other Black Sea ports. The Georgian Black Sea ports of Batumi and Poti process more than 90 percent of freight shipped to and from landlocked Armenia. The Georgian railway, which runs through the town of Gori in central Georgia, is the main transport link between Armenia and the aforementioned Georgian seaports. Fuel, wheat and other basic commodities are transported to Armenia by rail. Armenia's main rail and road border-crossing with Georgia (at ) is at the Debed river near the Armenian town of Bagratashen and the Georgian town of Sadakhlo. The Upper Lars border crossing (at Darial Gorge) between Georgia and Russia across the Caucasus Mountains serves as Armenia's sole overland route to the former Soviet Union and Europe. It was controversially shut down by the Russian authorities in June 2006, at the height of a Russian-Georgian spy scandal. Upper Lars is the only land border crossing that does not go through Georgia's Russian-backed breakaway regions of South Ossetia and Abkhazia. The other two roads linking Georgia and Russia run through South Ossetia and Abkhazia, effectively barring them to international traffic. Through Iran A new gas pipeline to Iran has been completed, and a road to Iran through the southern city of Meghri allows trade with that country. An oil pipeline to pump Iranian oil products is also in the planning stages. As of October 2008, the Armenian government was considering implementing an ambitious project to build a railway to Iran. The 400 kilometer railway would pass through Armenia's mountainous southern province of Syunik, which borders Iran. Economic analysts say that the project would cost at least $1 billion (equivalent to about 40 percent of Armenia's 2008 state budget). As of 2010, the project has been continuously delayed, with the rail link estimated to cost as much as $4 billion and stretch . In June 2010, Transport Minister Manuk Vartanian revealed that Yerevan is seeking as much as $1 billion in loans from China to finance the railway's construction. Through Turkey and Azerbaijan The border closures by Turkey and Azerbaijan have severed Armenia's rail link between Gyumri and Kars; the rail link with Iran through the Azeri exclave of Nakhichevan; and a natural gas and oil pipeline with Azerbaijan. Also closed are road links with Turkey and Azerbaijan. Despite the economic blockade of Turkey on Armenia, every day dozens of Turkish trucks laden with goods enter Armenia through Georgia. In 2010, it was confirmed that Turkey will keep the border closed for the foreseeable future after the Turkey-Armenia normalization process collapsed. Labor market Labor occupation According to the 2018 HDI statistical update, Armenia had the highest percentage of employment in services (49.7%) and lowest share in agriculture (34.4%) among the South Caucasus countries. Unionization In 2018, about 30% of wage workers were organized in unions. At the same time, rate of unionization was dropping at average rate of 1% since 1993. Monthly wages According to preliminary figures from Statistical Committee of Armenia monthly wages averaged to 172 thousand AMD in February 2019. It is estimated that wages rise at 0.8% for each additional year of experience and "the ability to solve problems and learn new skills yields a wage premium of nearly 20 percent". Unemployment It is reported that in 2020 there was a drop in the unemployment rate in Armenia from 16.99% in 2019 to 16.63% in 2020. The Statistical Committee of Armenia reported that In 2020, the unemployment rate has been volatile reaching to 19.8% during the first quarter of the year and then decreasing to 16% during the fourth quarter. According to the latest reports on population of Armenia, in December 2020 the population consisted of 2.96million people and the average monthly earning during February 2021 was US$366.05. According to prime minister Nikol Pashinyan in January 2019 562,043 payroll jobs were recorded, against of 511,902 in January 2018, an increase of 9.7%.Statistical Committee of Armenia publication based on data retrieved from employers and national income service cites 560,586 payroll positions in January 2019, an increase of 9.9% against previous year. This however does not match survey data published by the Statistical Committee of Armenia, according to which in 4th quarter of 2018 there were 870.1 thousand persons employed against 896.7 thousand employed persons in 4th quarter of 2017. The mismatch was highlighted by former PM Hrant Bagratyan. For the whole year of 2018 Statistical Committee of Armenia survey counted 915.5 thousand employed persons, an increase of 1.4% against previous year. In the same period unemployment rate of economically active population dropped from 20.8% to 20.4%. The unemployment rate increased to 19% in 2018 before dropping to 18.3% in 2019 and 18.2% in 2020, having remained basically unchanged since 2009. At the same time, an estimated 60% of workers were employed in the informal economy in 2019. The strong economic growth of 2021 and 2022 led to a significant drop in unemployment to 15.3% and 13% respectively, causing a substantial reduction in the proportion of the population living below the World Bank upper-middle income economy poverty threshold of $6.85 per day, from 51.7% in 2021 to 37.6% in 2023. World Bank research also reveals that employment rate fell in years 2000–2015 in middle- and low-skill occupations, while it grew high-skill occupations. See also Statistical Committee of Armenia publication (in English) "Labour market in the Republic of Armenia, 2018". Female unemployment in Armenia Worldwide, women's unemployment rate is higher than men's by approximately 0.8% and equals 6%. According to International Labor Organization, Armenia has the highest women's unemployment rate in post-Soviet countries, equaling 17.3% for women above 25. If we compare this rate to those of the neighboring countries (Latvia: 8.6%, Georgia: 7.7%, Azerbaijan: 4.8%), we can see that it is very high. In 2017, the National Statistical Service of Armenia stated that more than 60% of officially registered unemployed people in Armenia are women. One of the lecturers of Yerevan State University, Ani Kojoyan, mentioned that even though there is no issue in the legislation that becomes a reason for women's unemployment; however, there are some issues that are not mentioned in the legislation. Some of those issues are the fact that potential employers consider women's marital status, how many children they have, or if they are planning to get pregnant any time soon. Moreover, some women are not allowed to work by their husbands after graduating from higher educational institutions. She mentions that the most crucial problem affecting this phenomenon is the fact women do not stand up for their rights. It is also mentioned that according to various sources, there is an inequality in men's and women's monthly wages. In all the sectors, the average monthly salary of men is much higher than women even with the same years of education. It is stated that eliminating the discrimination between two genders would positively impact the country's economy. Ani Kojoyan mentions that this is a crucial problem for the economy except for being a women's rights violation. Thus, the Armenian government should take care that unemployed women can find jobs and become taxpayers. Migrant workers Since gaining independence in 1991, hundreds of thousands of Armenia's residents have gone abroad, mainly to Russia, in search of work. Unemployment has been the major cause of this massive labor emigration. OSCE experts estimate that between 116,000 and 147,000 people left Armenia for economic reasons between 2002 and 2004, with two-thirds of them returning home by February 2005. According to estimates by the National Statistical Survey, the rate of labor emigration was twice as higher in 2001 and 2002. According to an OSCE survey, a typical Armenian migrant worker is a married man aged between 41 and 50 years who "began looking for work abroad at the age of 32-33." For Armenians, another feature of migration was an increase in a variety of threats. The journey itself was extremely dangerous. To pay their way, may departing migrants took out loans failed, the whole family's future was put at a risk. As a consequence, the practice of delaying or refusing to pay part or all of a migrant workers wages has become common. The risks were also heightened by many emigrants failure. This type of migration inherited almost all of the negative characteristics that described pre-transition labor migration. During the workshop, participants addressed the increasing importance of migration as a growth factor, as well as the significance of SDG Target 10.7 on anticipated and well-managed migration policies for Armenia. Natural environment protection Environmental Project Implementation Unit implements projects related to Natural environment protection. Armenia's greenhouse gas emissions decreased 62% from 1990 to 2013, averaging -1.3% annually. Armenia is working on addressing its environmental problems. Ministry of Environment has introduced a pollution fee system by which taxes are levied on air and water emissions and solid waste disposal. See also Armenia Securities Exchange Diamond industry in Armenia Eurasian Economic Union Geographical Issues in Armenia List of banks in Armenia List of companies of Armenia Mercantilism in Armenia Notes Sources Books External links Investment Council of Armenia Fund for Rural Economic Development Armenia Securities Exchange Armenia Armenia

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https://en.wikipedia.org/wiki/Armed%20Forces%20of%20Armenia

Armed Forces of Armenia

The Armed Forces of Armenia (), sometimes referred to as the Armenian Army (), is the national military of Armenia. It consists of personnel branches under the General Staff of the Armenian Armed Forces, which can be divided into two general branches: the Ground Forces, and the Air Force. Although it was partially formed out of the former Soviet Army forces stationed in the Armenian SSR (mostly units of the 7th Guards Army of the Transcaucasian Military District), the military of Armenia can be traced back to the founding of the First Republic of Armenia in 1918. Being a landlocked country, Armenia has no navy. The Commander-in-Chief of the military is the President of Armenia, Vahagn Khachaturyan. The Ministry of Defence is in charge of political leadership, headed by Suren Papikyan, while military command remains in the hands of the general staff, headed by the Chief of Staff, who is Major-General Eduard Asryan. Border guards subject to the Ministry of Defence until 2001, patrol Armenia's borders with Georgia and Azerbaijan, while Russian troops continue to monitor its borders with Iran and Turkey. Since 2002, Armenia has been a member of the Collective Security Treaty Organization. Armenia signed a military cooperation plan with Lebanon on 27 November 2015. History Early Armenian Army An Armenian military corps was established to fight against the Ottomans during the Turkish–Armenian War in early 1918. In accordance with the Treaty of Batum of 4 June 1918 the Ottoman Empire demobilized most of the Armenian army. Ethnic Armenian conscripts and volunteers in the Imperial Russian Army would later become the core of the military of the First Armenian Republic. Soviet era The 7th Guards Army was based in Yerevan from 1946 to 1992. In the late 1980s the Army consisted of: Directorate – Yerevan 15th Motor Rifle Division – Kirovakan (now Vanadzor) 75th Motor Rifle Division – Nakhichevan 127th Motor Rifle Division – Leninakan (now Gyumri) 164th Motor Rifle Division – Yerevan On 1 June 1992, ITAR-TASS reported that General Fyodor Reut said that some units of the 7th Guards Army would begin leaving Armenia in 10–15 days. The army was disbanded later that summer. The former Soviet Air Defense Forces in Armenia were drawn from the 14th Air Defense Corps of the 19th Separate Air Defense Army. 1988–1992 The modern Armenian military entered its first stage at the beginning of the Nagorno-Karabakh conflict, when Armenian militias were formed to combat Azerbaijani units in Artsakh. On 20 September 1990, the first military unit was created, the Yerevan Special Regiment, with the first oath being held in the Republican Assembly Point and was attended by the first President of Armenia Levon Ter-Petrosyan, Prime Minister Vazgen Manukyan, and defence minister Vazgen Sargsyan. Five battalions were also formed in Ararat, Goris, Vardenis, Ijan and Meghri. In 1991, by the decision of the government, the State Committee of Defense under the Council of Ministers, which facilitated the task of coordinating the defense operations of Armenia, becoming the basis on which the Ministry of Defense was to be established later on. Post-1992 Armenia established a Ministry of Defence on 28 January 1992. The first military unit of the defence ministry to be formed was the 1st Airborne Regiment, where the first Armenian soldier took the oath to the nation that March. Since a significant part of the officers of the Armed Forces were fighters of the self-defense volunteer detachments, a center for raising the qualification of officers was established for their qualification and training, which during its activity it provided about 1,500 officer-graduates. The School of Non-Commissioned Officers produced about 1,000 graduates. The Treaty on Conventional Armed Forces in Europe was ratified by the Armenian parliament in July 1992. The treaty establishes comprehensive limits on key categories of military equipment, such as tanks, artillery, armored combat vehicles, combat aircraft, and combat helicopters, and provides for the destruction of weaponry in excess of those limits. Armenian officials have consistently expressed determination to comply with its provisions and thus Armenia has provided data on armaments as required under the CFE Treaty. Despite this, Azerbaijan accuses Armenia of diverting a large part of its military forces to Nagorno-Karabakh and thus circumventing these international regulations. In March 1993, Armenia signed the multilateral Chemical Weapons Convention, which calls for the eventual elimination of chemical weapons. Armenia acceded to the nuclear Non-Proliferation Treaty as a non-nuclear weapons state in July 1993. In addition to the branches of services listed above, Armenia established its own Internal Troops from the former Soviet Interior Troops after the dissolution of the Soviet Union. Up until December 2002, Armenia maintained a Ministry of Internal Affairs, but along with the Ministry of National Security, it was reorganized as a non-ministerial institution. The two organizations became the Police of Armenia and the National Security Service. Organization and service branches The Armenian Armed Forces are Headquartered in Yerevan, where most of the general staff is based. The general staff is responsible for operational command of the Armenian Military and its two major branches. The armed forces also has the following personnel branches: Department of Military Preparedness Department of Military Apparatus Department of Aviation Department of Missile Troops Department of Air Defence Department of Rear Services Department of Signal Troops Department of the Engineer Troops Department of Armaments Department of the RNBC Defence Troops Medical Department Personnel Department Intelligence Department Strategic Planning Department Mobilization Department Operative Department Department of Military Service Security Department of Military Commissars Financial Department Human Resources Department Ground Forces According to IISS 2010, Armenia has 20 T-80 tanks, 137 T-72 tanks, 8 T-54/55 tanks and 80 BMP-1's, 7 BMP-1K, 55 BMP-2 and 12 BRM-1K. Wheeled APCs reported included 11 BTR-60s, 21 BTR-70s, 4 BTR-80s, 145 MT-LBs, 5 BMD-1S, and 120 BRDM-2 scout vehicles. Although the Russians have supplied newer equipment to Armenia over the years, the numbers have never been sufficient to upgrade all ground force formations and many of the lower readiness units still have older, Soviet-legacy systems that have not been upgraded or in many cases effectively maintained. These older systems are placing great demands on the logistics system for service, maintenance, replacement parts and necessary upgrades, costing the army both financially and in overall readiness. The ground force is engaged in an effort of reassessment, reorganisation and restructuring, as the future of Armenia's defence needs a revised force structure and unit mix. The army sees the need to maintain much of its traditional mechanised formations, but is looking to lighten and make more mobile and self-sustainable a small number of other formations. It must develop these newer formations to support its international requirements and effectively operate in mountainous and other rugged terrain, but it must do this without affecting the mechanised capability that is needed to confront Azerbaijan's conventional forces. Since the fall of the Soviet Union, Armenia has followed a policy of developing its armed forces into a professional, well trained, and mobile military. In 2000, the Centre for International Studies and Research reported that at that time the Armenian Army had the strongest combat capability of the three South Caucasus countries' armies (the other two being Georgia and Azerbaijan). CSTO Secretary, Nikolay Bordyuzha, came to a similar conclusion after collective military drills in 2007 when he stated that, "the Armenian Army is the most efficient one in the post-Soviet space". This was echoed more recently by Igor Korotchenko, a member of the Public Council, Russian Ministry of Defense, in a March 2011 interview with Voice of Russia radio. The Army is functionally divided into Active and Reserve Forces. Their main functions include deterrence, defense, peace support and crisis management, humanitarian and rescue missions, as well as social functions within Armenian society. The Active Forces mainly have peacekeeping and defensive duties, and are further divided into Deployment Forces, Immediate Reaction, and Main Defense Forces. The Reserve Forces consists of Enhancement Forces, Territorial Defense Forces, and Training Grounds. They deal with planning and reservist preparation, armaments and equipment storage, training of formations for active forces rotation or increase in personnel. During peacetime the Army maintains permanent combat and mobilization readiness. They become part of multinational military formations in compliance with international treaties Armenia is a signatory to, participate in the preparation of the population, the national economy and the maintenance of wartime reserves and the infrastructure of the country for defense. In times of crisis the Army's main tasks relate to participation in operations countering terrorist activities and defense of strategic facilities (such as nuclear power plants and major industrial facilities), assisting the security forces in proliferation of weapons of mass destruction, illegal armaments traffic and international terrorism. In case of low- and medium-intensity military conflict the Active Forces that are part of the Army participate in carrying out the initial tasks for the defense of the territorial integrity and sovereignty of the country. In case of a high intensity conflict the Land Forces, together with the Air Force, Air Defense and Border Guards, form the defense group of the Armenian Armed Forces aiming at countering aggression and protect the territorial integrity and sovereignty of the country. Experiments in developing small arms have been undertaken in Armenia, producing the K-3 assault rifle, but Jane's Infantry Weapons estimates that the program has ceased, and the rifle is not in widespread service with the army. The AK-74 is the standard issue rifle of the Armenian Army with older AKMs in reserve use. Beside AK rifles Armenian forces use mostly Russian small arms like the Makarov pistol, SVD sniper rifle, and the PKM general purpose machine gun. Air Force and Air Defense The Armenian Air Force consists of 15 Su-25 ground attack planes, 18 Su-30 jet fighters, 1 Mig 25, 16 Mil Mi-24 helicopter gunships, 6 L-39 trainer and attack aircraft, 16 Yak-52 trainer aircraft, 3 Il-76 cargo planes, 18 Mil Mi-8 transport helicopters, and 10 Mil Mi-2 light utility helicopters. There are an additional 18 MiG-29 fighter jets of the Russian 102nd Military Base stationed in Gyumri. The Armenian anti-aircraft branch was equipped and organized as part of the military reform program of Lieutenant-General Norat Ter-Grigoryants. It consists of an anti-aircraft missile brigade and two regiments armed with 100 anti-aircraft complexes of various models and modifications, including the SA-8, Krug, S-75, S-125, SA-7, SA-10, SA-13, SA-16 and SA-18. Russia has SA-6 and S-300 long range surface-to-air missiles at the Russian 102nd Military Base. There are also 24 Scud ballistic missiles with eight launchers. Numerical strength is estimated at 3,000 servicemen, with plans for further expansion. In late December 2010, the Armenian Defense Minister, Seyran Ohanyan, officially acknowledged that the army are equipped with the Russian-made S-300 surface-to-air missiles. The statement was made while the Minister was inspecting a new air-defense command point that maintains "state-of-the-art equipment" built specifically for the operation of the S-300's. Russian specialist started to train Armenian teams on sophisticated Missiles and Defensive Systems. The S-300 was paraded for the first time in the 2011 Parade and the only S-300 missile system (SA10 Grumble) which likes mobility. The S-300 is the main Air Defensive system that protects Armenia's air security. In the 2016 Armenian Parade celebrating the Armenian Independence BUK-M2 Air Defense Systems were shown. These systems were not part of the 200 million dollar contract agreement between Yerevan and Moscow but an agreement between CSTO partners. Other devices such as stem of electronic warfare (EW) "Infauna" and P-325U consist in the Armenian Armed Forces. Military of Artsakh In addition to forces mentioned above, there are around 20,000 active soldiers defending Nagorno-Karabakh, a disputed territory which seceded from Azerbaijan in 1991 and is now a de facto independent state. They are well trained and well equipped with the latest in military software and hardware. The Karabakh army's heavy military hardware includes: 316 tanks, 324 armored vehicles, 322 artillery pieces of calibers over 122 mm, 44 multiple rocket launchers, and a new anti-aircraft defense system. In addition, the NKR Defence Army maintains a small air-force of 2 Su-25s, 5 Mi-24s and 5 other helicopters. Personnel The Armed Forces of Armenia is constitutionally a conscript force, but there is also a growing number of professional officers. There were roughly 19,000 conscripts and 23,000 professionals serving in 2017. Enlistment, which is performed twice a year, is handled by military commissariats. Male draftees between the ages of 18 and 27 are obliged to present themselves in the commissariats for registration. People who have changed their citizenship or have dual citizenship are also subject to conscription, unless they have already served in the armed forces of another country. Since 2003, conscientious objectors can apply for alternative service. Draft evaders can not be appointed to public service positions. Citizens who have completed military service are registered in the reserve and are divided into rank and file, non-commissioned and commissioned staff of the reserve. Reservists can be called up to training musters and exercises in peacetime. Reserve obligation lasts up to the age of 50. Educational institutions National Defense Research University Vazgen Sargsyan Military University Monte Melkonian Military Academy Armenak Khanperyants Military Aviation University Yerevan State Medical University Military Faculty Foreign institutions for Armenian soldiers Military Academy of Modena École spéciale militaire de Saint-Cyr Hellenic Military Academy Military University of the Ministry of Defense of the Russian Federation—College of Military Finance Higher military education is provided by the National Defense Research University in Yerevan. It was established in 2016, on the basis of the Institute for National Strategic Studies. The I Have the Honour State Program is an educational program of the ministry of defence that serves conscripts in the army. Participants of the program are given the right to defer conscription in favor of education in post-secondary institutions with full reimbursement of tuition fees, after which the conscript is awarded the rank of lieutenant and is appointed to the service for a period of 2 years and 3 months. Contract service A contractual military service is a service last for 3–12 months, or for a term of three or five years. Males under 36 who have not previously served as contract servicemen and are registered in the reserve, can be enrolled in contractual military service as privates. Felons and those not fit for service are ineligible for contract service. Since 2008, sergeant training courses for contract servicemen have operated in the Armed Forces and since 2013, the duration of the courses has three months. The courses are open to reservist privates under the age of 25. Conscription Military service in Armenia is mandatory. Citizens aged 27 to 50 are registered in the reserve and may be drafted if a national mobilization was declared. The enlistment process is handled by the military commissariats in January and May. Dual citizens are not be exempt from the draft. If one fails to follow through with their obligations, a criminal case is then instituted, which could lead to 3 years in jail. The following military commissariats operate in Armenia: Yerevan Conscription and Mobilization Service No.1 territorial subdivision No.2 Territorial Subdivision No.3 Territorial Subdivision No.4 Territorial Subdivision Ashtarak Aragatsotn Regional Subdivision Artashat Ararat Regional Subdivision Armavir Armavir Regional Subdivision Martuni Gegharkunik Regional Subdivision Abovyan Kotayk Regional Subdivision Vanadzor Lori Regional Subdivision Gyumri Shirak Regional Subdivision Goris Syunik Regional Subdivision Ijevan Tavush Regional Subdivision Yeghegnadzor Vayots Dzor Province Regional Subdivision The armed forces also sport the following volunteer units: Sisakan Regiment Erato Detachment Vanadzor Volunteer Detachment Homeland Detachment ARF Battalion Tigran the Great International Military Regiment Women in the armed forces During the First Nagorno-Karabakh War in the early 90s, at least 115 Armenian women were known to have taken part in combat operations. Many women from the diaspora arrived to serve in non-combat missions. The first woman to have been given a significant position in the military was Zhanna Galstyan, who was appointed deputy commander of the Central District Defensive Unit after the formation of the Artsakh Defense Army. More than 2,000 women currently serve in the army, with most working in administrative positions or in liaison and medical units. In October 2016, a program, approved by the National Assembly, committed the military to "creating additional opportunities" for women serving in the army or seeking military service. Defense Minister Vigen Sargsyan at the time told the MPs that "It would be wrong not to let them (women) reach their full potential." The Erato Detachment was the first all-women military unit in the Armenian Armed Forces, being created after of clashes between the Azerbaijani Army and Armenia occurred in July 2020. Anna Hakobyan, the wife of the current Prime Minister of Armenia, Nikol Pashinyan, underwent a week long combat readiness program with women from the Republic of Artsakh who joined the unit. Minorities During the 2020 war, a group of Yazidi reservists formed a reserve military unit that joined the frontline in Karabakh. The unit was led by Rzgan Sarhangyan and is composed of 50 soldiers aged between 18 and 55. Equipment The Armenian Army operates a wide variety of older equipment, mostly of Soviet origin. There is also some newer equipment from Russia. In 2015, a US$200m loan was ratified by Russia for the purchase of modern weapons between 2015 and 2017. Armenia produces its own combat helmets and body armors through the works of a joint Armenian-Polish company. Some personal equipment used by special units (Future Assault Shell Technology helmets, plate carriers and special pouches) is imported. Armenia also produces most of its small arms, with only specialised units being imported. Following the 2016 Nagorno-Karabakh clashes, the Helsinki Citizens' Assembly released a report, which detailed the circumstances of death of Armenian servicemen. Among the contributing factors were stated to be malfunctioning equipment and lack of necessary materiel, especially ammunition. This was followed by plans to increase Armenian defense spending to purchase more weapons and ammunition. Armenia is not a significant exporter of conventional weapons, but it has provided support, including material, to the Armenians of Nagorno-Karabakh during the Nagorno-Karabakh conflict. International military cooperation Russia Russia is one of the closest allies of Armenia. The Russian 102nd Military Base, the former 127th Motor Rifle Division, is stationed in Gyumri. The military alliance of the two nations and, in particular, the presence of Russian troops on Armenian soil has been a key element of Armenia's national security doctrine since Armenia gained independence in 1991. Russia stations an estimated 5,000 soldiers of all types in Armenia, including 3,000 officially reported to be based at the 102nd Military Base. In 1997, the two countries signed a far-reaching friendship treaty, which calls for mutual assistance in the event of a military threat to either party and allows Russian border guards to patrol Armenia's frontiers with Turkey and Iran. In early 2005, the 102nd Military Base had 74 tanks, 17 battle infantry vehicles, 148 armored personnel carriers, 84 artillery pieces, 18 MiG-29 fighters, one battery of SA-6 and two batteries of S-300 anti-aircraft missiles. However, in 2005–2007, following an agreement on the withdrawal of two Russian military bases from Georgia, a great deal of military hardware was moved to the 102nd Base from the Russian 12th Military Base in Batumi and the 62nd Military Base at Akhalkalaki, Georgia. Russia also supplies weapons at the relatively lower prices of the Russian domestic market as part of a collective security agreement since January 2004. According to unconfirmed reports by the Azeri media, Russia has supplied $1 billion worth of arms and ammunitions to Armenia in 1996; and handed over an additional $800 million worth of arms to Armenia in 2008–2009. According to AzerNews, the weapons in this latest transfer include 21 tanks, 12 armored vehicles, five other battle machines, a great number of rocket launchers, over 1,050 cases of grenades, nearly 7,900 types of ammunition, 120 grenade launchers, over 4,000 sub-machine guns, TNT fuses, mines of various types, 14 mine-launchers, 9 Grad launchers, five cannons, and other weapons. Officer training is another sphere of Russian-Armenian military cooperation. In the first years of sovereignty when Armenia lacked a military educational establishment of its own, officers of its army were trained in Russia. Even now when Armenia has a military college on its own territory, the Armenian officer corps honors the tradition and is trained at Russian military educational establishments. In 1997, 600 Armenian servicemen were being trained at Russian Military Academies: the training was conducted by the Marshal Bagramyan Training Brigade. At the first meeting of the joint Russian-Armenian government panel for military-technical cooperation that took place during autumn 2005, Prime Minister Mikhail Fradkov reported that, Russian factories will participate in the Armenian program of military modernization, and that Russia is prepared to supply the necessary spare parts and equipment. In accordance with this agreement, Armenia and Russia agreed to work together in exporting weapons and other military equipment to third countries in December 2009. The export agreement was signed by Defense Minister Seyran Ohanyan and a visiting senior Russian official, Konstantin Biryulin, during a meeting of a Russian-Armenian inter-governmental commission on bilateral military-technical cooperation. The agreement envisages the two countries' interaction in exporting military production to third countries, which will help to strengthen the armed forces of the two states, and further cement the already close Russian–Armenian military cooperation. A Russian-Armenian defense agreement signed in August 2010 extends Russia's military presence in Armenia till 2044 and commits Russia to supplying Armenia with modern and compatible weaponry and special military hardware at reduced prices. At the beginning of 2009, Azerbaijani media published allegations that Russia had made extensive weapons transfers to Armenia throughout 2008 costing about $800 million. On 12 January 2009, the Russian ambassador was invited to the Azerbaijani Ministry of Foreign Affairs and asked about this information. On 21 January 2009, Russian ministry of foreign relations officially denied the transfers. According to the materials published by WikiLeaks in December 2010, Azerbaijani defence minister Safar Abiyev claimed that in January 2009 during his visit to Moscow, his Russian counterpart Anatoly Serdyukov unofficially had admitted to weapons transfers "after the second bottle of vodka" that evening, although officially it was denied. In June 2013 it was revealed that Russia has deployed in Armenia several Iskander-M ballistic missiles systems, which are stationed at undisclosed locations in the country. Collective Security Treaty Organisation On 7 October 2002, the Presidents of Armenia, Belarus, Kazakhstan, Kyrgyzstan, Russia and Tajikistan, signed a charter in Tashkent, founding the Collective Security Treaty Organisation (CSTO) (Russian: Организация Договора о Коллективной Безопасности (ОДКБ~ODKB)) or simply Ташкентский договор (The Tashkent Treaty). Nikolai Bordyuzha was appointed secretary general of the new organisation. On 23 June 2006, Uzbekistan became a full participant in the CSTO and its membership was formally ratified by its parliament on 28 March 2008. Furthermore, the CSTO is an observer organisation at the United Nations General Assembly. The charter reaffirmed the desire of all participating states to abstain from the use or threat of force. Signatories would not be able to join other military alliances or other groups of states, while aggression against one signatory would be perceived as an aggression against all. To this end, the CSTO holds yearly military command exercises for the CSTO nations to have an opportunity to improve inter-organisation cooperation. The largest-scale CSTO military exercise held, to date, were the "Rubezh 2008" exercises hosted in Armenia where a combined total of 4,000 troops from all 7 constituent CSTO member countries conducted operative, strategic, and tactical training with an emphasis towards furthering the efficiency of the collective security element of the CSTO partnership. The Ministry of Defense of Armenia has repeatedly stated that it would expect direct military assistance from the CSTO in case war with Azerbaijan resumes, as recently as December 2009, Defense Minister Ohanyan made the same statement. In August 2009, Nikolay Bordyuzha, the CSTO's secretary-general, confirmed that official Yerevan can count on such support. On 4 February 2009, an agreement to create the Collective Rapid Reaction Force (KSOR) was reached by five of the seven CSTO members, with plans finalized on 14 June 2009. Armenia is one of the five member states. The force is intended to be used to repulse military aggression, conduct anti-terrorist operations, fight transnational crime and drug trafficking, and neutralize the effects of natural disasters. NATO Armenia participates in NATO's Partnership for Peace (PiP) program and it is in a NATO organization called Euro-Atlantic Partnership Council (EAPC). Armenia is in the process of implementation of Individual Partnership Action Plans (IPAPs), which is a program for those countries that have the political will and ability to deepen their relationship with NATO. Cooperative Best Effort exercise (the first where Russia was represented) was run on Armenian territory in 2003. France On 5 October 2023, following the 2023 Azerbaijani offensive in Nagorno-Karabakh, France announced that it would send defense aid to the Armenian military. Greece Greece is Armenia's closest ally in NATO and the two cooperate on multiple issues. A number of Armenian officers are trained in Greece every year, and military aid/material assistance has been provided to Armenia. In 2003, the two countries signed a military cooperation accord, under which Greece will increase the number of Armenian servicemen trained at the military and military-medical academies in Athens. In February 2003, Armenia sent 34 peacekeepers to Kosovo where they became part of the Greek contingent. Officials in Yerevan have said the Armenian military plans to substantially increase the size of its peacekeeping detachment and counts on Greek assistance to the effort. In June 2008, Armenia sent 72 peacekeepers to Kosovo for a total of 106 peacekeepers. Baltic States Lithuania has been sharing experience and providing consultations to the Armenian Defense Ministry in the field of democratic control of armed forces, military and defense concepts and public relations since 2002. Since 2004, Armenian officers have been invited to study at the Lithuanian War Academy and the Baltic Defence College in Tartu, Estonia. Lithuania covers all study expenditures. In early 2007, two Armenian officers for the first time took part in a Baltic lead international exercise, Amber Hope, which was held in Lithuania. United States The United States has been steadily upping its military clout in the region. In early 2003, the United States Department of Defense announced several major military programs in the Caucasus. Washington's military aid to Armenia in 2005 amounted to $5 million, and in April 2004, the two sides signed a military-technical cooperation accord. In late 2004, Armenia deployed a unit of 46 soldiers, which included bomb-disposal experts, doctors, and transport specialists, to Iraq as part of the American-led Multi-National Force Iraq. In 2005, the United States allocated $7 million to modernize the military communications of the Armenian Armed Forces. Since 2003, Armenia and the Kansas National Guard have exchanged military delegations as part of a National Guard Bureau program to promote better relations between the United States and developing nations. The program has largely consisted of mutual visits to each other's countries in an effort to share "ideas and [the] best practices for military and emergency management." Eagle Partner 2023 was a military exercise which took place in Armenia from 11 September to 20 September 2023. The main goal of the exercise was the fortifying of the alliance between the United States with Armenia and also the training of the 12th Peacekeeping Brigade of the Armed Forces of Armenia for future peacekeeping missions. Peacekeeping operations As of 2022, Armenia is involved in peacekeeping operations in Kosovo, Afghanistan, Lebanon, Mali and Kazakhstan Kosovo There are 70 Armenian soldiers serving in Kosovo as peacekeepers. Armenia joined the Kosovo Force in Kosovo in 2004. Armenian "blue helmets" serve within the Greek Army battalion. The relevant memorandum was signed on 3 September 2003, in Yerevan and ratified by the Armenian Parliament on 13 December 2003. The sixth deployment of Armenian peacekeepers departed for Kosovo on 14 November 2006. In 2008, the Armenian National Assembly voted unanimously to double the peacekeeping force in Kosovo by sending an extra 34 peacekeepers to the region, increasing the total number of peacekeepers in the region to 68. Armenia temporarily withdrew its peacekeepers from Kosovo in February 2012 as a result of the reduction of the Greek subdivisions. Armenia redeployed them in July to serve alongside American soldiers in Kosovo. Iraq After the end of the invasion of Iraq, Armenia deployed a unit of 46 peacekeepers under Polish command. Armenian peacekeepers were based in Al-Kut, from the capital of Baghdad. On 23 July 2006, the fourth shift of Armenian peacekeepers departed for Iraq. The shift included 3 staff commanders, 2 medical officers, 10 combat engineers and 31 drivers. Throughout the length of the deployment, there was one Armenian wounded and no deaths. The Armenian government extended the small troop presence in Iraq by one year at the end of 2005 and 2006. On 7 October 2008, Armenia withdrew its contingent of 46 peacekeepers. This coincided with the withdrawal of the Polish contingent in Iraq. Afghanistan Armenia deployed 130 soldiers in Afghanistan as part of the NATO-led International Security Assistance Force (ISAF). They were serving under German command protecting an airport in Kunduz. Lebanon In 2014, Armenia deployed 33 peacekeepers to Lebanon as part of UNIFIL. They currently serve under the Italian contingent and fulfill headquarter security functions. Mali In 2015, one peacekeeper was dispatched to Mali on a monitoring-peacekeeping mission. Kazakhstan In 2022, Armenia sent around 100 servicemen to Kazakhstan as part of the Collective Security Treaty Organization peacekeeping forces. Nikol Pashinyan, who serves as the CSTO chairman, confirmed that the alliance will send 'peacekeepers' to Kazakhstan for a limited period given the threat to national security and the sovereignty of Kazakhstan, due to the 2022 Kazakh protests. References External links Armenian Ministry of Defense

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https://en.wikipedia.org/wiki/Avicenna

Avicenna

Ibn Sina (; 980 – June 1037 CE), commonly known in the West as Avicenna (), was the preeminent philosopher and physician of the Muslim world, flourishing during the Islamic Golden Age, serving in the courts of various Iranian rulers. He is often described as the father of early modern medicine. His philosophy was of the Muslim Peripatetic school derived from Aristotelianism. His most famous works are The Book of Healing, a philosophical and scientific encyclopedia, and The Canon of Medicine, a medical encyclopedia which became a standard medical text at many medieval universities and remained in use as late as 1650. Besides philosophy and medicine, Avicenna's corpus includes writings on astronomy, alchemy, geography and geology, psychology, Islamic theology, logic, mathematics, physics, and works of poetry. Avicenna wrote most of his philosophical and scientific works in Arabic, but also wrote several key works in Persian, while his poetic works were written in both languages. Of the 450 works he is believed to have written, around 240 have survived, including 150 on philosophy and 40 on medicine. Name is a Latin corruption of the Arabic patronym Ibn Sīnā (), meaning "Son of Sina". However, Avicenna was not the son but the great-great-grandson of a man named Sina. His formal Arabic name was Abū ʿAlī al-Ḥusayn bin ʿAbdullāh ibn al-Ḥasan bin ʿAlī bin Sīnā al-Balkhi al-Bukhari (). Circumstances Avicenna created an extensive corpus of works during what is commonly known as the Islamic Golden Age, in which the translations of Byzantine Greco-Roman, Persian and Indian texts were studied extensively. Greco-Roman (Mid- and Neo-Platonic, and Aristotelian) texts translated by the Kindi school were commented, redacted and developed substantially by Islamic intellectuals, who also built upon Persian and Indian mathematical systems, astronomy, algebra, trigonometry and medicine. The Samanid dynasty in the eastern part of Persia, Greater Khorasan and Central Asia as well as the Buyid dynasty in the western part of Persia and Iraq provided a thriving atmosphere for scholarly and cultural development. Under the Samanids, Bukhara rivaled Baghdad as a cultural capital of the Islamic world. There, Avicenna had access to the great libraries of Balkh, Khwarezm, Gorgan, Rey, Isfahan and Hamadan. Various texts (such as the 'Ahd with Bahmanyar) show that Avicenna debated philosophical points with the greatest scholars of the time. Aruzi Samarqandi describes how before Avicenna left Khwarezm he had met Al-Biruni (a famous scientist and astronomer), Abu Nasr Iraqi (a renowned mathematician), Abu Sahl Masihi (a respected philosopher) and Abu al-Khayr Khammar (a great physician). The study of the Quran and the Hadith also thrived, and Islamic philosophy, fiqh and theology (kalaam) were all further developed by Avicenna and his opponents at this time. Biography Early life and education Avicenna was born in in the village of Afshana in Transoxiana to a family of Persian stock. The village was near the Samanid capital of Bukhara, which was his mother's hometown. His father Abd Allah was a native of the city of Balkh in Tukharistan. An official of the Samanid bureaucracy, he had served as the governor of a village of the royal estate of Harmaytan (near Bukhara) during the reign of Nuh II (). Avicenna also had a younger brother. A few years later, the family settled in Bukhara, a center of learning, which attracted many scholars. It was there that Avicenna was educated, which early on was seemingly administered by his father. Although both Avicenna's father and brother had converted to Ismailism, he himself did not follow the faith. He was instead an adherent of the Sunni Hanafi school, which was also followed by the Samanids. Avicenna was first schooled in the Quran and literature, and by the age of 10, he had memorized the entire Quran. He was later sent by his father to an Indian greengrocer, who taught him arithmetic. Afterwards, he was schooled in Jurisprudence by the Hanafi jurist Ismail al-Zahid. Some time later, Avicenna's father invited the physician and philosopher Abu Abdallah al-Natili to their house to educate Avicenna. Together, they studied the Isagoge of Porphyry (died 305) and possibly the Categories of Aristotle (died 322 BC) as well. After Avicenna had read the Almagest of Ptolemy (died 170) and Euclid's Elements, Natili told him to continue his research independently. By the time Avicenna was eighteen, he was well-educated in Greek sciences. Although Avicenna only mentions Natili as his teacher in his autobiography, he most likely had other teachers as well, such as the physicians Abu Mansur Qumri and Abu Sahl al-Masihi. Career In Bukhara and Gurganj At the age of seventeen, Avicenna was made a physician of Nuh II. By the time Avicenna was at least 21 years old, his father died. He was subsequently given an administrative post, possibly succeeding his father as the governor of Harmaytan. Avicenna later moved to Gurganj, the capital of Khwarazm, which he reports that he did due to "necessity". The date he went to the place is uncertain, as he reports that he served the Khwarazmshah (ruler) of the region, the Ma'munid Abu al-Hasan Ali. The latter ruled from 997 to 1009, which indicates that Avicenna moved sometime during that period. He may have moved in 999, the year which the Samanid state fell after the Turkic Qarakhanids captured Bukhara and imprisoned the Samanid ruler Abd al-Malik II. Due to his high position and strong connection with the Samanids, Avicenna may have found himself in an unfavorable position after the fall of his suzerain. It was through the minister of Gurganj, Abu'l-Husayn as-Sahi, a patron of Greek sciences, that Avicenna entered into the service of Abu al-Hasan Ali. Under the Ma'munids, Gurganj became a centre of learning, attracting many prominent figures, such as Avicenna and his former teacher Abu Sahl al-Masihi, the mathematician Abu Nasr Mansur, the physician Ibn al-Khammar, and the philologist al-Tha'alibi. In Gurgan Avicenna later moved due to "necessity" once more (in 1012), this time to the west. There he travelled through the Khurasani cities of Nasa, Abivard, Tus, Samangan and Jajarm. He was planning to visit the ruler of the city of Gurgan, the Ziyarid Qabus (), a cultivated patron of writing, whose court attracted many distinguished poets and scholars. However, when Avicenna eventually arrived, he discovered that the ruler had been dead since the winter of 1013. Avicenna then left Gurgan for Dihistan, but returned after becoming ill. There he met Abu 'Ubayd al-Juzjani (died 1070) who became his pupil and companion. Avicenna stayed briefly in Gurgan, reportedly serving Qabus's son and successor Manuchihr () and resided in the house of a patron. In Ray and Hamadan In , Avicenna went to the city of Ray, where he entered into the service of the Buyid amir (ruler) Majd al-Dawla () and his mother Sayyida Shirin, the de facto ruler of the realm. There he served as the physician at the court, treating Majd al-Dawla, who was suffering from melancholia. Avicenna reportedly later served as the "business manager" of Sayyida Shirin in Qazvin and Hamadan, though details regarding this tenure are unclear. During this period, Avicenna finished his Canon of Medicine, and started writing his Book of Healing. In 1015, during Avicenna's stay in Hamadan, he participated in a public debate, as was custom for newly arrived scholars in western Iran at that time. The purpose of the debate was to examine one's reputation against a prominent local resident. The person whom Avicenna debated against was Abu'l-Qasim al-Kirmani, a member of the school of philosophers of Baghdad. The debate became heated, resulting in Avicenna accusing Abu'l-Qasim of lack of basic knowledge in logic, while Abu'l-Qasim accused Avicenna of impoliteness. After the debate, Avicenna sent a letter to the Baghdad Peripatetics, asking if Abu'l-Qasim's claim that he shared the same opinion as them was true. Abu'l-Qasim later retaliated by writing a letter to an unknown person, in which he made accusations so serious, that Avicenna wrote to a deputy of Majd al-Dawla, named Abu Sa'd, to investigate the matter. The accusation made towards Avicenna may have been the same as he had received earlier, in which he was accused by the people of Hamadan of copying the stylistic structures of the Quran in his Sermons on Divine Unity. The seriousness of this charge, in the words of the historian Peter Adamson, "cannot be underestimated in the larger Muslim culture." Not long afterwards, Avicenna shifted his allegiance to the rising Buyid amir Shams al-Dawla (the younger brother of Majd al-Dawla), which Adamson suggests was due to Abu'l-Qasim also working under Sayyida Shirin. Avicenna had been called upon by Shams al-Dawla to treat him, but after the latter's campaign in the same year against his former ally, the Annazid ruler Abu Shawk (), he forced Avicenna to become his vizier. Although Avicenna would sometimes clash with Shams al-Dawla's troops, he remained vizier until the latter died of colic in 1021. Avicenna was asked by Shams al-Dawla's son and successor Sama' al-Dawla () to stay as vizier, but instead went into hiding with his patron Abu Ghalib al-Attar, to wait for better opportunities to emerge. It was during this period that Avicenna was secretly in contact with Ala al-Dawla Muhammad (), the Kakuyid ruler of Isfahan and uncle of Sayyida Shirin. It was during his stay at Attar's home that Avicenna completed his Book of Healing, writing 50 pages a day. The Buyid court in Hamadan, particularly the Kurdish vizier Taj al-Mulk, suspected Avicenna of correspondence with Ala al-Dawla, and as result had the house of Attar ransacked and Avicenna imprisoned in the fortress of Fardajan, outside Hamadan. Juzjani blames one of Avicenna's informers for his capture. Avicenna was imprisoned for four months, until Ala al-Dawla captured Hamadan, thus putting an end to Sama al-Dawla's reign. In Isfahan Avicenna was subsequently released, and went to Isfahan, where he was well received by Ala al-Dawla. In the words of Juzjani, the Kakuyid ruler gave Avicenna "the respect and esteem which someone like him deserved." Adamson also says that Avicenna's service under Ala al-Dawla "proved to be the most stable period of his life." Avicenna served as the advisor, if not vizier of Ala al-Dawla, accompanying him in many of his military expeditions and travels. Avicenna dedicated two Persian works to him, a philosophical treatise named Danish-nama-yi Ala'i ("Book of Science for Ala"), and a medical treatise about the pulse. During the brief occupation of Isfahan by the Ghaznavids in January 1030, Avicenna and Ala al-Dawla relocated to the southwestern Iranian region of Khuzistan, where they stayed until the death of the Ghaznavid ruler Mahmud (), which occurred two months later. It was seemingly when Avicenna returned to Isfahan that he started writing his Pointers and Reminders. In 1037, while Avicenna was accompanying Ala al-Dawla to a battle near Isfahan, he contracted a severe colic, which he had been suffering from throughout his life. He died shortly afterwards in Hamadan, where he was buried. Philosophy Avicenna wrote extensively on early Islamic philosophy, especially the subjects logic, ethics and metaphysics, including treatises named Logic and Metaphysics. Most of his works were written in Arabic—then the language of science in the Middle East—and some in Persian. Of linguistic significance even to this day are a few books that he wrote in nearly pure Persian language (particularly the Danishnamah-yi 'Ala', Philosophy for Ala' ad-Dawla'). Avicenna's commentaries on Aristotle often criticized the philosopher, encouraging a lively debate in the spirit of ijtihad. Avicenna's Neoplatonic scheme of "emanations" became fundamental in the Kalam (school of theological discourse) in the 12th century. His Book of Healing became available in Europe in partial Latin translation some fifty years after its composition, under the title Sufficientia, and some authors have identified a "Latin Avicennism" as flourishing for some time, paralleling the more influential Latin Averroism, but suppressed by the Parisian decrees of 1210 and 1215. Avicenna's psychology and theory of knowledge influenced William of Auvergne, Bishop of Paris and Albertus Magnus, while his metaphysics influenced the thought of Thomas Aquinas. Metaphysical doctrine Early Islamic philosophy and Islamic metaphysics, imbued as it is with Islamic theology, distinguishes between essence and existence more clearly than Aristotelianism. Whereas existence is the domain of the contingent and the accidental, essence endures within a being beyond the accidental. The philosophy of Avicenna, particularly that part relating to metaphysics, owes much to al-Farabi. The search for a definitive Islamic philosophy separate from Occasionalism can be seen in what is left of his work. Following al-Farabi's lead, Avicenna initiated a full-fledged inquiry into the question of being, in which he distinguished between essence (Mahiat) and existence (Wujud). He argued that the fact of existence cannot be inferred from or accounted for by the essence of existing things, and that form and matter by themselves cannot interact and originate the movement of the universe or the progressive actualization of existing things. Existence must, therefore, be due to an agent-cause that necessitates, imparts, gives, or adds existence to an essence. To do so, the cause must be an existing thing and coexist with its effect. Avicenna's consideration of the essence-attributes question may be elucidated in terms of his ontological analysis of the modalities of being; namely impossibility, contingency and necessity. Avicenna argued that the impossible being is that which cannot exist, while the contingent in itself (mumkin bi-dhatihi) has the potentiality to be or not to be without entailing a contradiction. When actualized, the contingent becomes a 'necessary existent due to what is other than itself' (wajib al-wujud bi-ghayrihi). Thus, contingency-in-itself is potential beingness that could eventually be actualized by an external cause other than itself. The metaphysical structures of necessity and contingency are different. Necessary being due to itself (wajib al-wujud bi-dhatihi) is true in itself, while the contingent being is 'false in itself' and 'true due to something else other than itself'. The necessary is the source of its own being without borrowed existence. It is what always exists. The Necessary exists 'due-to-Its-Self', and has no quiddity/essence (mahiyya) other than existence (wujud). Furthermore, It is 'One' (wahid ahad) since there cannot be more than one 'Necessary-Existent-due-to-Itself' without differentia (fasl) to distinguish them from each other. Yet, to require differentia entails that they exist 'due-to-themselves' as well as 'due to what is other than themselves'; and this is contradictory. However, if no differentia distinguishes them from each other, then there is no sense in which these 'Existents' are not one and the same. Avicenna adds that the 'Necessary-Existent-due-to-Itself' has no genus (jins), nor a definition (hadd), nor a counterpart (nadd), nor an opposite (did), and is detached (bari) from matter (madda), quality (kayf), quantity (kam), place (ayn), situation (wad) and time (waqt). Avicenna's theology on metaphysical issues (ilāhiyyāt) has been criticized by some Islamic scholars, among them al-Ghazali, Ibn Taymiyya and Ibn al-Qayyim. While discussing the views of the theists among the Greek philosophers, namely Socrates, Plato and Aristotle in Al-Munqidh min ad-Dalal ("Deliverance from Error"), al-Ghazali noted that the Greek philosophers "must be taxed with unbelief, as must their partisans among the Muslim philosophers, such as Avicenna and al-Farabi and their likes." He added that "None, however, of the Muslim philosophers engaged so much in transmitting Aristotle's lore as did the two men just mentioned. [...] The sum of what we regard as the authentic philosophy of Aristotle, as transmitted by al-Farabi and Avicenna, can be reduced to three parts: a part which must be branded as unbelief; a part which must be stigmatized as innovation; and a part which need not be repudiated at all." Argument for God's existence Avicenna made an argument for the existence of God which would be known as the "Proof of the Truthful" (Arabic: burhan al-siddiqin). Avicenna argued that there must be a "necessary existent" (Arabic: wajib al-wujud), an entity that cannot not exist and through a series of arguments, he identified it with the Islamic conception of God. Present-day historian of philosophy Peter Adamson called this argument one of the most influential medieval arguments for God's existence, and Avicenna's biggest contribution to the history of philosophy. Al-Biruni correspondence Correspondence between Avicenna (with his student Ahmad ibn 'Ali al-Ma'sumi) and Al-Biruni has survived in which they debated Aristotelian natural philosophy and the Peripatetic school. Abu Rayhan began by asking Avicenna eighteen questions, ten of which were criticisms of Aristotle's On the Heavens. Theology Avicenna was a devout Muslim and sought to reconcile rational philosophy with Islamic theology. His aim was to prove the existence of God and His creation of the world scientifically and through reason and logic. Avicenna's views on Islamic theology (and philosophy) were enormously influential, forming part of the core of the curriculum at Islamic religious schools until the 19th century. Avicenna wrote a number of short treatises dealing with Islamic theology. These included treatises on the prophets (whom he viewed as "inspired philosophers"), and also on various scientific and philosophical interpretations of the Quran, such as how Quranic cosmology corresponds to his own philosophical system. In general these treatises linked his philosophical writings to Islamic religious ideas; for example, the body's afterlife. There are occasional brief hints and allusions in his longer works, however, that Avicenna considered philosophy as the only sensible way to distinguish real prophecy from illusion. He did not state this more clearly because of the political implications of such a theory, if prophecy could be questioned, and also because most of the time he was writing shorter works which concentrated on explaining his theories on philosophy and theology clearly, without digressing to consider epistemological matters which could only be properly considered by other philosophers. Later interpretations of Avicenna's philosophy split into three different schools; those (such as al-Tusi) who continued to apply his philosophy as a system to interpret later political events and scientific advances; those (such as al-Razi) who considered Avicenna's theological works in isolation from his wider philosophical concerns; and those (such as al-Ghazali) who selectively used parts of his philosophy to support their own attempts to gain greater spiritual insights through a variety of mystical means. It was the theological interpretation championed by those such as al-Razi which eventually came to predominate in the madrasahs. Avicenna memorized the Quran by the age of ten, and as an adult, he wrote five treatises commenting on suras from the Quran. One of these texts included the Proof of Prophecies, in which he comments on several Quranic verses and holds the Quran in high esteem. Avicenna argued that the Islamic prophets should be considered higher than philosophers. Avicenna is generally understood to have been aligned with the Sunni Hanafi school of thought. Avicenna studied Hanafi law, many of his notable teachers were Hanafi jurists, and he served under the Hanafi court of Ali ibn Mamun. Avicenna said at an early age that he remained "unconvinced" by Ismaili missionary attempts to convert him. Medieval historian Ẓahīr al-dīn al-Bayhaqī (d. 1169) also believed Avicenna to be a follower of the Brethren of Purity. Thought experiments While he was imprisoned in the castle of Fardajan near Hamadhan, Avicenna wrote his famous "floating man"—literally falling man—a thought experiment to demonstrate human self-awareness and the substantiality and immateriality of the soul. Avicenna believed his "Floating Man" thought experiment demonstrated that the soul is a substance, and claimed humans cannot doubt their own consciousness, even in a situation that prevents all sensory data input. The thought experiment told its readers to imagine themselves created all at once while suspended in the air, isolated from all sensations, which includes no sensory contact with even their own bodies. He argued that, in this scenario, one would still have self-consciousness. Because it is conceivable that a person, suspended in air while cut off from sense experience, would still be capable of determining his own existence, the thought experiment points to the conclusions that the soul is a perfection, independent of the body, and an immaterial substance. The conceivability of this "Floating Man" indicates that the soul is perceived intellectually, which entails the soul's separateness from the body. Avicenna referred to the living human intelligence, particularly the active intellect, which he believed to be the hypostasis by which God communicates truth to the human mind and imparts order and intelligibility to nature. Following is an English translation of the argument: However, Avicenna posited the brain as the place where reason interacts with sensation. Sensation prepares the soul to receive rational concepts from the universal Agent Intellect. The first knowledge of the flying person would be "I am," affirming his or her essence. That essence could not be the body, obviously, as the flying person has no sensation. Thus, the knowledge that "I am" is the core of a human being: the soul exists and is self-aware. Avicenna thus concluded that the idea of the self is not logically dependent on any physical thing, and that the soul should not be seen in relative terms, but as a primary given, a substance. The body is unnecessary; in relation to it, the soul is its perfection. In itself, the soul is an immaterial substance. Principal works The Canon of Medicine Avicenna authored a five-volume medical encyclopedia: The Canon of Medicine (Al-Qanun fi't-Tibb). It was used as the standard medical textbook in the Islamic world and Europe up to the 18th century. The Canon still plays an important role in Unani medicine. Liber Primus Naturalium Avicenna considered whether events like rare diseases or disorders have natural causes. He used the example of polydactyly to explain his perception that causal reasons exist for all medical events. This view of medical phenomena anticipated developments in the Enlightenment by seven centuries. The Book of Healing Earth sciences Avicenna wrote on Earth sciences such as geology in The Book of Healing. While discussing the formation of mountains, he explained: Philosophy of science In the Al-Burhan (On Demonstration) section of The Book of Healing, Avicenna discussed the philosophy of science and described an early scientific method of inquiry. He discussed Aristotle's Posterior Analytics and significantly diverged from it on several points. Avicenna discussed the issue of a proper methodology for scientific inquiry and the question of "How does one acquire the first principles of a science?" He asked how a scientist would arrive at "the initial axioms or hypotheses of a deductive science without inferring them from some more basic premises?" He explained that the ideal situation is when one grasps that a "relation holds between the terms, which would allow for absolute, universal certainty". Avicenna then added two further methods for arriving at the first principles: the ancient Aristotelian method of induction (istiqra), and the method of examination and experimentation (tajriba). Avicenna criticized Aristotelian induction, arguing that "it does not lead to the absolute, universal, and certain premises that it purports to provide." In its place, he developed a "method of experimentation as a means for scientific inquiry." Logic An early formal system of temporal logic was studied by Avicenna. Although he did not develop a real theory of temporal propositions, he did study the relationship between temporalis and the implication. Avicenna's work was further developed by Najm al-Dīn al-Qazwīnī al-Kātibī and became the dominant system of Islamic logic until modern times. Avicennian logic also influenced several early European logicians such as Albertus Magnus and William of Ockham. Avicenna endorsed the law of non-contradiction proposed by Aristotle, that a fact could not be both true and false at the same time and in the same sense of the terminology used. He stated, "Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be beaten is not the same as not to be beaten, and to be burned is not the same as not to be burned." Physics In mechanics, Avicenna, in The Book of Healing, developed a theory of motion, in which he made a distinction between the inclination (tendency to motion) and force of a projectile, and concluded that motion was a result of an inclination (mayl) transferred to the projectile by the thrower, and that projectile motion in a vacuum would not cease. He viewed inclination as a permanent force whose effect is dissipated by external forces such as air resistance. The theory of motion presented by Avicenna was probably influenced by the 6th-century Alexandrian scholar John Philoponus. Avicenna's is a less sophisticated variant of the theory of impetus developed by Buridan in the 14th century. It is unclear if Buridan was influenced by Avicenna, or by Philoponus directly. In optics, Avicenna was among those who argued that light had a speed, observing that "if the perception of light is due to the emission of some sort of particles by a luminous source, the speed of light must be finite." He also provided a wrong explanation of the rainbow phenomenon. Carl Benjamin Boyer described Avicenna's ("Ibn Sīnā") theory on the rainbow as follows: In 1253, a Latin text entitled Speculum Tripartitum stated the following regarding Avicenna's theory on heat: Psychology Avicenna's legacy in classical psychology is primarily embodied in the Kitab al-nafs parts of his Kitab al-shifa (The Book of Healing) and Kitab al-najat (The Book of Deliverance). These were known in Latin under the title De Anima (treatises "on the soul"). Notably, Avicenna develops what is called the Flying Man argument in the Psychology of The Cure I.1.7 as defence of the argument that the soul is without quantitative extension, which has an affinity with Descartes's cogito argument (or what phenomenology designates as a form of an "epoche"). Avicenna's psychology requires that connection between the body and soul be strong enough to ensure the soul's individuation, but weak enough to allow for its immortality. Avicenna grounds his psychology on physiology, which means his account of the soul is one that deals almost entirely with the natural science of the body and its abilities of perception. Thus, the philosopher's connection between the soul and body is explained almost entirely by his understanding of perception; in this way, bodily perception interrelates with the immaterial human intellect. In sense perception, the perceiver senses the form of the object; first, by perceiving features of the object by our external senses. This sensory information is supplied to the internal senses, which merge all the pieces into a whole, unified conscious experience. This process of perception and abstraction is the nexus of the soul and body, for the material body may only perceive material objects, while the immaterial soul may only receive the immaterial, universal forms. The way the soul and body interact in the final abstraction of the universal from the concrete particular is the key to their relationship and interaction, which takes place in the physical body. The soul completes the action of intellection by accepting forms that have been abstracted from matter. This process requires a concrete particular (material) to be abstracted into the universal intelligible (immaterial). The material and immaterial interact through the Active Intellect, which is a "divine light" containing the intelligible forms. The Active Intellect reveals the universals concealed in material objects much like the sun makes colour available to our eyes. Other contributions Astronomy and astrology Avicenna wrote an attack on astrology titled Resāla fī ebṭāl aḥkām al-nojūm, in which he cited passages from the Quran to dispute the power of astrology to foretell the future. He believed that each planet had some influence on the earth, but argued against astrologers being able to determine the exact effects. Avicenna's astronomical writings had some influence on later writers, although in general his work could be considered less developed than Alhazen or Al-Biruni. One important feature of his writing is that he considers mathematical astronomy as a separate discipline to astrology. He criticized Aristotle's view of the stars receiving their light from the Sun, stating that the stars are self-luminous, and believed that the planets are also self-luminous. He claimed to have observed Venus as a spot on the Sun. This is possible, as there was a transit on 24 May 1032, but Avicenna did not give the date of his observation, and modern scholars have questioned whether he could have observed the transit from his location at that time; he may have mistaken a sunspot for Venus. He used his transit observation to help establish that Venus was, at least sometimes, below the Sun in Ptolemaic cosmology, i.e. the sphere of Venus comes before the sphere of the Sun when moving out from the Earth in the prevailing geocentric model. He also wrote the Summary of the Almagest, (based on Ptolemy's Almagest), with an appended treatise "to bring that which is stated in the Almagest and what is understood from Natural Science into conformity". For example, Avicenna considers the motion of the solar apogee, which Ptolemy had taken to be fixed. Chemistry Avicenna was first to derive the attar of flowers from distillation and used steam distillation to produce essential oils such as rose essence, which he used as aromatherapeutic treatments for heart conditions. Unlike al-Razi, Avicenna explicitly disputed the theory of the transmutation of substances commonly believed by alchemists: Four works on alchemy attributed to Avicenna were translated into Latin as: was the most influential, having influenced later medieval chemists and alchemists such as Vincent of Beauvais. However, Anawati argues (following Ruska) that the de Anima is a fake by a Spanish author. Similarly the Declaratio is believed not to be actually by Avicenna. The third work (The Book of Minerals) is agreed to be Avicenna's writing, adapted from the Kitab al-Shifa (Book of the Remedy). Avicenna classified minerals into stones, fusible substances, sulfurs and salts, building on the ideas of Aristotle and Jabir. The epistola de Re recta is somewhat less sceptical of alchemy; Anawati argues that it is by Avicenna, but written earlier in his career when he had not yet firmly decided that transmutation was impossible. Poetry Almost half of Avicenna's works are versified. His poems appear in both Arabic and Persian. As an example, Edward Granville Browne claims that the following Persian verses are incorrectly attributed to Omar Khayyám, and were originally written by Ibn Sīnā: Legacy Classical Islamic civilization Robert Wisnovsky, a scholar of Avicenna attached to McGill University, says that "Avicenna was the central figure in the long history of the rational sciences in Islam, particularly in the fields of metaphysics, logic and medicine" but that his works didn't only have an influence in these "secular" fields of knowledge alone, as "these works, or portions of them, were read, taught, copied, commented upon, quoted, paraphrased and cited by thousands of post-Avicennian scholars—not only philosophers, logicians, physicians and specialists in the mathematical or exact sciences, but also by those who specialized in the disciplines of ʿilm al-kalām (rational theology, but understood to include natural philosophy, epistemology and philosophy of mind) and usūl al-fiqh (jurisprudence, but understood to include philosophy of law, dialectic, and philosophy of language)." Middle Ages and Renaissance As early as the 14th century when Dante Alighieri depicted him in Limbo alongside the virtuous non-Christian thinkers in his Divine Comedy such as Virgil, Averroes, Homer, Horace, Ovid, Lucan, Socrates, Plato and Saladin. Avicenna has been recognized by both East and West as one of the great figures in intellectual history. Johannes Kepler cites Avicenna's opinion when discussing the causes of planetary motions in Chapter 2 of Astronomia Nova. George Sarton, the author of The History of Science, described Avicenna as "one of the greatest thinkers and medical scholars in history" and called him "the most famous scientist of Islam and one of the most famous of all races, places, and times". He was one of the Islamic world's leading writers in the field of medicine. Along with Rhazes, Abulcasis, Ibn al-Nafis and al-Ibadi, Avicenna is considered an important compiler of early Muslim medicine. He is remembered in the Western history of medicine as a major historical figure who made important contributions to medicine and the European Renaissance. His medical texts were unusual in that where controversy existed between Galen and Aristotle's views on medical matters (such as anatomy), he preferred to side with Aristotle, where necessary updating Aristotle's position to take into account post-Aristotelian advances in anatomical knowledge. Aristotle's dominant intellectual influence among medieval European scholars meant that Avicenna's linking of Galen's medical writings with Aristotle's philosophical writings in the Canon of Medicine (along with its comprehensive and logical organisation of knowledge) significantly increased Avicenna's importance in medieval Europe in comparison to other Islamic writers on medicine. His influence following translation of the Canon was such that from the early fourteenth to the mid-sixteenth centuries he was ranked with Hippocrates and Galen as one of the acknowledged authorities, ("prince of physicians"). Modern reception Institutions in a variety of counties have been named after Avicenna in honour of his scientific accomplishments, including the Avicenna Mausoleum and Museum, Bu-Ali Sina University, Avicenna Research Institute and Ibn Sina Academy of Medieval Medicine and Sciences. There is also a crater on the Moon named Avicenna. The Avicenna Prize, established in 2003, is awarded every two years by UNESCO and rewards individuals and groups for their achievements in the field of ethics in science. The Avicenna Directories (2008–15; now the World Directory of Medical Schools) list universities and schools where doctors, public health practitioners, pharmacists and others, are educated. The original project team stated: In June 2009, Iran donated a "Persian Scholars Pavilion" to the United Nations Office in Vienna. It now sits in the Vienna International Center. In popular culture The 1982 Soviet film Youth of Genius () by recounts Avicenna's younger years. The film is set in Bukhara at the turn of the millennium. In Louis L'Amour's 1985 historical novel The Walking Drum, Kerbouchard studies and discusses Avicenna's The Canon of Medicine. In his book The Physician (1988) Noah Gordon tells the story of a young English medical apprentice who disguises himself as a Jew to travel from England to Persia and learn from Avicenna, the great master of his time. The novel was adapted into a feature film, The Physician, in 2013. Avicenna was played by Ben Kingsley. List of works The treatises of Avicenna influenced later Muslim thinkers in many areas including theology, philology, mathematics, astronomy, physics and music. His works numbered almost 450 volumes on a wide range of subjects, of which around 240 have survived. In particular, 150 volumes of his surviving works concentrate on philosophy and 40 of them concentrate on medicine. His most famous works are The Book of Healing, and The Canon of Medicine. Avicenna wrote at least one treatise on alchemy, but several others have been falsely attributed to him. His Logic, Metaphysics, Physics, and De Caelo, are treatises giving a synoptic view of Aristotelian doctrine, though Metaphysics demonstrates a significant departure from the brand of Neoplatonism known as Aristotelianism in Avicenna's world; Arabic philosophers have hinted at the idea that Avicenna was attempting to "re-Aristotelianise" Muslim philosophy in its entirety, unlike his predecessors, who accepted the conflation of Platonic, Aristotelian, Neo- and Middle-Platonic works transmitted into the Muslim world. The Logic and Metaphysics have been extensively reprinted, the latter, e.g., at Venice in 1493, 1495 and 1546. Some of his shorter essays on medicine, logic, etc., take a poetical form (the poem on logic was published by Schmoelders in 1836). Two encyclopedic treatises, dealing with philosophy, are often mentioned. The larger, Al-Shifa' (Sanatio), exists nearly complete in manuscript in the Bodleian Library and elsewhere; part of it on the De Anima appeared at Pavia (1490) as the Liber Sextus Naturalium, and the long account of Avicenna's philosophy given by Muhammad al-Shahrastani seems to be mainly an analysis, and in many places a reproduction, of the Al-Shifa'. A shorter form of the work is known as the An-najat (Liberatio). The Latin editions of part of these works have been modified by the corrections which the monastic editors confess that they applied. There is also a (hikmat-al-mashriqqiyya, in Latin Philosophia Orientalis), mentioned by Roger Bacon, the majority of which is lost in antiquity, which according to Averroes was pantheistic in tone. Avicenna's works further include: Sirat al-shaykh al-ra'is (The Life of Avicenna), ed. and trans. WE. Gohlman, Albany, NY: State University of New York Press, 1974. (The only critical edition of Avicenna's autobiography, supplemented with material from a biography by his student Abu 'Ubayd al-Juzjani. A more recent translation of the Autobiography appears in D. Gutas, Avicenna and the Aristotelian Tradition: Introduction to Reading Avicenna's Philosophical Works, Leiden: Brill, 1988; second edition 2014.) Al-isharat wa al-tanbihat (Remarks and Admonitions), ed. S. Dunya, Cairo, 1960; parts translated by S.C. Inati, Remarks and Admonitions, Part One: Logic, Toronto, Ont.: Pontifical Institute for Mediaeval Studies, 1984, and Ibn Sina and Mysticism, Remarks and Admonitions: Part 4, London: Kegan Paul International, 1996. Al-Qanun fi'l-tibb (The Canon of Medicine), ed. I. a-Qashsh, Cairo, 1987. (Encyclopedia of medicine.) manuscript, Latin translation, Flores Avicenne, Michael de Capella, 1508, Modern text. Ahmed Shawkat Al-Shatti, Jibran Jabbur. Risalah fi sirr al-qadar (Essay on the Secret of Destiny), trans. G. Hourani in Reason and Tradition in Islamic Ethics, Cambridge: Cambridge University Press, 1985. Danishnama-i 'ala'i (The Book of Scientific Knowledge), ed. and trans. P. Morewedge, The Metaphysics of Avicenna, London: Routledge and Kegan Paul, 1973. Kitab al-Shifa''' (The Book of Healing). (Avicenna's major work on philosophy. He probably began to compose al-Shifa' in 1014, and completed it in 1020.) Critical editions of the Arabic text have been published in Cairo, 1952–83, originally under the supervision of I. Madkour. Kitab al-Najat (The Book of Salvation), trans. F. Rahman, Avicenna's Psychology: An English Translation of Kitab al-Najat, Book II, Chapter VI with Historical-philosophical Notes and Textual Improvements on the Cairo Edition, Oxford: Oxford University Press, 1952. (The psychology of al-Shifa'.) (Digital version of the Arabic text) Risala fi'l-Ishq (A Treatise on Love). Translated by Emil L. Fackenheim. Persian works Avicenna's most important Persian work is the Danishnama-i 'Alai (, "the Book of Knowledge for [Prince] 'Ala ad-Daulah"). Avicenna created new scientific vocabulary that had not previously existed in Persian. The Danishnama covers such topics as logic, metaphysics, music theory and other sciences of his time. It has been translated into English by Parwiz Morewedge in 1977. The book is also important in respect to Persian scientific works.Andar Danesh-e Rag (, "On the Science of the Pulse") contains nine chapters on the science of the pulse and is a condensed synopsis. Persian poetry from Avicenna is recorded in various manuscripts and later anthologies such as Nozhat al-Majales. See also Al-Qumri (possibly Avicenna's teacher) Abdol Hamid Khosro Shahi (Iranian theologian) Mummia (Persian medicine) Eastern philosophy Iranian philosophy Islamic philosophy Contemporary Islamic philosophy Science in the medieval Islamic world List of scientists in medieval Islamic world Sufi philosophy Science and technology in Iran Ancient Iranian medicine List of pre-modern Iranian scientists and scholars Namesakes of Ibn Sina Ibn Sina Academy of Medieval Medicine and Sciences in Aligarh Avicenna Bay in Antarctica Avicenna (crater) on the far side of the Moon Avicenna Cultural and Scientific Foundation Avicenne Hospital in Paris, France Avicenna International College in Budapest, Hungary Avicenna Mausoleum (complex dedicated to Avicenna) in Hamadan, Iran Avicenna Research Institute in Tehran, Iran Avicenna Tajik State Medical University in Dushanbe, Tajikistan Bu-Ali Sina University in Hamedan, Iran Ibn Sina Peak – named after the Scientist, on the Kyrgyzstan–Tajikistan border Ibn Sina Foundation in Houston, Texas Ibn Sina Hospital, Baghdad, Iraq Ibn Sina Hospital, Istanbul, Turkey Ibn Sina Medical College Hospital, Dhaka, Bangladesh Ibn Sina University Hospital of Rabat-Salé at Mohammed V University in Rabat, Morocco Ibne Sina Hospital, Multan, Punjab, Pakistan International Ibn Sina Clinic, Dushanbe, Tajikistan References Citations Sources Further reading Encyclopedic articles (PDF version) Avicenna entry by Sajjad H. Rizvi in the Internet Encyclopedia of Philosophy Primary literature For an old list of other extant works, C. Brockelmann's Geschichte der arabischen Litteratur (Weimar 1898), vol. i. pp. 452–458. (XV. W.; G. W. T.) For a current list of his works see A. Bertolacci (2006) and D. Gutas (2014) in the section "Philosophy". Avicenne: Réfutation de l'astrologie. Edition et traduction du texte arabe, introduction, notes et lexique par Yahya Michot. Préface d'Elizabeth Teissier (Beirut-Paris: Albouraq, 2006) . William E. Gohlam (ed.), The Life of Ibn Sina. A Critical Edition and Annotated Translation, Albany, State of New York University Press, 1974. For Ibn Sina's life, see Ibn Khallikan's Biographical Dictionary, translated by de Slane (1842); F. Wüstenfeld's Geschichte der arabischen Aerzte und Naturforscher (Göttingen, 1840). Madelung, Wilferd and Toby Mayer (ed. and tr.), Struggling with the Philosopher: A Refutation of Avicenna's Metaphysics. A New Arabic Edition and English Translation of Shahrastani's Kitab al-Musara'a. Secondary literature This is, on the whole, an informed and good account of the life and accomplishments of one of the greatest influences on the development of thought both Eastern and Western. ... It is not as philosophically thorough as the works of D. Saliba, A.M. Goichon, or L. Gardet, but it is probably the best essay in English on this important thinker of the Middle Ages. (Julius R. Weinberg, The Philosophical Review, Vol. 69, No. 2, Apr. 1960, pp. 255–259) This is a distinguished work which stands out from, and above, many of the books and articles which have been written in this century on Avicenna (Ibn Sīnā) (980–1037). It has two main features on which its distinction as a major contribution to Avicennan studies may be said to rest: the first is its clarity and readability; the second is the comparative approach adopted by the author. ... (Ian Richard Netton, Journal of the Royal Asiatic Society, Third Series, Vol. 4, No. 2, July 1994, pp. 263–264) Y.T. Langermann (ed.), Avicenna and his Legacy. A Golden Age of Science and Philosophy, Brepols Publishers, 2010, For a new understanding of his early career, based on a newly discovered text, see also: Michot, Yahya, Ibn Sînâ: Lettre au vizir Abû Sa'd. Editio princeps d'après le manuscrit de Bursa, traduction de l'arabe, introduction, notes et lexique (Beirut-Paris: Albouraq, 2000) . This German publication is both one of the most comprehensive general introductions to the life and works of the philosopher and physician Avicenna (Ibn Sīnā, d. 1037) and an extensive and careful survey of his contribution to the history of science. Its author is a renowned expert in Greek and Arabic medicine who has paid considerable attention to Avicenna in his recent studies. ... (Amos Bertolacci, Isis, Vol. 96, No. 4, December 2005, p. 649) Shaikh al Rais Ibn Sina (Special number) 1958–59, Ed. Hakim Syed Zillur Rahman, Tibbia College Magazine, Aligarh Muslim University, Aligarh, India. Medicine Browne, Edward G. Islamic Medicine. Fitzpatrick Lectures Delivered at the Royal College of Physicians in 1919–1920, reprint: New Delhi: Goodword Books, 2001. Pormann, Peter & Savage-Smith, Emilie. Medieval Islamic Medicine, Washington: Georgetown University Press, 2007. Prioreschi, Plinio. Byzantine and Islamic Medicine, A History of Medicine, Vol. 4, Omaha: Horatius Press, 2001. Syed Ziaur Rahman. Pharmacology of Avicennian Cardiac Drugs (Metaanalysis of researches and studies in Avicennian Cardiac Drugs along with English translation of Risalah al Adwiya al Qalbiyah), Ibn Sina Academy of Medieval Medicine and Sciences, Aligarh, India, 2020 Philosophy Amos Bertolacci, The Reception of Aristotle's Metaphysics in Avicenna's Kitab al-Sifa'. A Milestone of Western Metaphysical Thought, Leiden: Brill 2006, (Appendix C contains an Overview of the Main Works by Avicenna on Metaphysics in Chronological Order). Dimitri Gutas, Avicenna and the Aristotelian Tradition: Introduction to Reading Avicenna's Philosophical Works, Leiden, Brill 2014, second revised and expanded edition (first edition: 1988), including an inventory of Avicenna' Authentic Works. Andreas Lammer: The Elements of Avicenna's Physics. Greek Sources and Arabic Innovations. Scientia graeco-arabica 20. Berlin / Boston: Walter de Gruyter, 2018. Jon McGinnis and David C. Reisman (eds.) Interpreting Avicenna: Science and Philosophy in Medieval Islam: Proceedings of the Second Conference of the Avicenna Study Group, Leiden: Brill, 2004. Michot, Jean R., La destinée de l'homme selon Avicenne, Louvain: Aedibus Peeters, 1986, . Nader El-Bizri, The Phenomenological Quest between Avicenna and Heidegger, Binghamton, N.Y.: Global Publications SUNY, 2000 (reprinted by SUNY Press in 2014 with a new Preface). Nader El-Bizri, "Avicenna and Essentialism," Review of Metaphysics, Vol. 54 (June 2001), pp. 753–778. Nader El-Bizri, "Avicenna's De Anima between Aristotle and Husserl," in The Passions of the Soul in the Metamorphosis of Becoming, ed. Anna-Teresa Tymieniecka, Dordrecht: Kluwer, 2003, pp. 67–89. Nader El-Bizri, "Being and Necessity: A Phenomenological Investigation of Avicenna's Metaphysics and Cosmology," in Islamic Philosophy and Occidental Phenomenology on the Perennial Issue of Microcosm and Macrocosm, ed. Anna-Teresa Tymieniecka, Dordrecht: Kluwer, 2006, pp. 243–261. Nader El-Bizri, 'Ibn Sīnā's Ontology and the Question of Being', Ishrāq: Islamic Philosophy Yearbook 2 (2011), 222–237 Nader El-Bizri, 'Philosophising at the Margins of 'Sh'i Studies': Reflections on Ibn Sīnā's Ontology', in The Study of Sh'i Islam. History, Theology and Law, eds. F. Daftary and G. Miskinzoda (London: I.B. Tauris, 2014), pp. 585–597. Reisman, David C. (ed.), Before and After Avicenna: Proceedings of the First Conference of the Avicenna Study Group'', Leiden: Brill, 2003. External links Avicenna (Ibn-Sina) on the Subject and the Object of Metaphysics with a list of translations of the logical and philosophical works and an annotated bibliography 980s births Year of birth unknown 1037 deaths 11th-century astronomers 11th-century Persian-language poets 11th-century philosophers 11th-century Iranian physicians Alchemists of the medieval Islamic world Aristotelian philosophers Burials in Iran Buyid viziers Classical humanists Critics of atheism Epistemologists Iranian music theorists Islamic philosophers Transoxanian Islamic scholars Logicians People from Bukhara Region Pharmacologists of medieval Iran Musical theorists of the medieval Islamic world Ontologists People from Khorasan Persian physicists Philosophers of logic Philosophers of mind Philosophers of psychology Philosophers of religion Philosophers of science Samanid scholars Unani medicine Iranian logicians Iranian ethicists Samanid officials Philosophers of mathematics

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https://en.wikipedia.org/wiki/Analysis

Analysis

Analysis (: analyses) is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. The technique has been applied in the study of mathematics and logic since before Aristotle (384–322 B.C.), though analysis as a formal concept is a relatively recent development. The word comes from the Ancient Greek (analysis, "a breaking-up" or "an untying;" from ana- "up, throughout" and lysis "a loosening"). From it also comes the word's plural, analyses. As a formal concept, the method has variously been ascribed to Alhazen, René Descartes (Discourse on the Method), and Galileo Galilei. It has also been ascribed to Isaac Newton, in the form of a practical method of physical discovery (which he did not name). The converse of analysis is synthesis: putting the pieces back together again in a new or different whole. Applications Science The field of chemistry uses analysis in three ways: to identify the components of a particular chemical compound (qualitative analysis), to identify the proportions of components in a mixture (quantitative analysis), and to break down chemical processes and examine chemical reactions between elements of matter. For an example of its use, analysis of the concentration of elements is important in managing a nuclear reactor, so nuclear scientists will analyze neutron activation to develop discrete measurements within vast samples. A matrix can have a considerable effect on the way a chemical analysis is conducted and the quality of its results. Analysis can be done manually or with a device. Types of Analysis: A) Qualitative Analysis: It is concerned with which components are in a given sample or compound. Example: Precipitation reaction B) Quantitative Analysis: It is to determine the quantity of individual component present in a given sample or compound. Example: To find concentration by uv-spectrophotometer. Isotopes Chemists can use isotope analysis to assist analysts with issues in anthropology, archeology, food chemistry, forensics, geology, and a host of other questions of physical science. Analysts can discern the origins of natural and man-made isotopes in the study of environmental radioactivity. Business Financial statement analysis – the analysis of the accounts and the economic prospects of a firm Financial analysis – refers to an assessment of the viability, stability, and profitability of a business, sub-business or project Gap analysis – involves the comparison of actual performance with potential or desired performance of an organization Business analysis – involves identifying the needs and determining the solutions to business problems Price analysis – involves the breakdown of a price to a unit figure Market analysis – consists of suppliers and customers, and price is determined by the interaction of supply and demand Sum-of-the-parts analysis – method of valuation of a multi-divisional company Opportunity analysis – consists of customers trends within the industry, customer demand and experience determine purchasing behavior Computer science Requirements analysis – encompasses those tasks that go into determining the needs or conditions to meet for a new or altered product, taking account of the possibly conflicting requirements of the various stakeholders, such as beneficiaries or users. Competitive analysis (online algorithm) – shows how online algorithms perform and demonstrates the power of randomization in algorithms Lexical analysis – the process of processing an input sequence of characters and producing as output a sequence of symbols Object-oriented analysis and design – à la Booch Program analysis (computer science) – the process of automatically analysing the behavior of computer programs Semantic analysis (computer science) – a pass by a compiler that adds semantical information to the parse tree and performs certain checks Static code analysis – the analysis of computer software that is performed without actually executing programs built from that Structured systems analysis and design methodology – à la Yourdon Syntax analysis – a process in compilers that recognizes the structure of programming languages, also known as parsing Worst-case execution time – determines the longest time that a piece of software can take to run Economics Agroecosystem analysis Input–output model if applied to a region, is called Regional Impact Multiplier System Engineering Analysts in the field of engineering look at requirements, structures, mechanisms, systems and dimensions. Electrical engineers analyse systems in electronics. Life cycles and system failures are broken down and studied by engineers. It is also looking at different factors incorporated within the design. Intelligence The field of intelligence employs analysts to break down and understand a wide array of questions. Intelligence agencies may use heuristics, inductive and deductive reasoning, social network analysis, dynamic network analysis, link analysis, and brainstorming to sort through problems they face. Military intelligence may explore issues through the use of game theory, Red Teaming, and wargaming. Signals intelligence applies cryptanalysis and frequency analysis to break codes and ciphers. Business intelligence applies theories of competitive intelligence analysis and competitor analysis to resolve questions in the marketplace. Law enforcement intelligence applies a number of theories in crime analysis. Linguistics Linguistics explores individual languages and language in general. It breaks language down and analyses its component parts: theory, sounds and their meaning, utterance usage, word origins, the history of words, the meaning of words and word combinations, sentence construction, basic construction beyond the sentence level, stylistics, and conversation. It examines the above using statistics and modeling, and semantics. It analyses language in context of anthropology, biology, evolution, geography, history, neurology, psychology, and sociology. It also takes the applied approach, looking at individual language development and clinical issues. Literature Literary criticism is the analysis of literature. The focus can be as diverse as the analysis of Homer or Freud. While not all literary-critical methods are primarily analytical in nature, the main approach to the teaching of literature in the west since the mid-twentieth century, literary formal analysis or close reading, is. This method, rooted in the academic movement labelled The New Criticism, approaches texts – chiefly short poems such as sonnets, which by virtue of their small size and significant complexity lend themselves well to this type of analysis – as units of discourse that can be understood in themselves, without reference to biographical or historical frameworks. This method of analysis breaks up the text linguistically in a study of prosody (the formal analysis of meter) and phonic effects such as alliteration and rhyme, and cognitively in examination of the interplay of syntactic structures, figurative language, and other elements of the poem that work to produce its larger effects. Mathematics Modern mathematical analysis is the study of infinite processes. It is the branch of mathematics that includes calculus. It can be applied in the study of classical concepts of mathematics, such as real numbers, complex variables, trigonometric functions, and algorithms, or of non-classical concepts like constructivism, harmonics, infinity, and vectors. Florian Cajori explains in A History of Mathematics (1893) the difference between modern and ancient mathematical analysis, as distinct from logical analysis, as follows: The terms synthesis and analysis are used in mathematics in a more special sense than in logic. In ancient mathematics they had a different meaning from what they now have. The oldest definition of mathematical analysis as opposed to synthesis is that given in [appended to] Euclid, XIII. 5, which in all probability was framed by Eudoxus: "Analysis is the obtaining of the thing sought by assuming it and so reasoning up to an admitted truth; synthesis is the obtaining of the thing sought by reasoning up to the inference and proof of it." The analytic method is not conclusive, unless all operations involved in it are known to be reversible. To remove all doubt, the Greeks, as a rule, added to the analytic process a synthetic one, consisting of a reversion of all operations occurring in the analysis. Thus the aim of analysis was to aid in the discovery of synthetic proofs or solutions. James Gow uses a similar argument as Cajori, with the following clarification, in his A Short History of Greek Mathematics (1884): The synthetic proof proceeds by shewing that the proposed new truth involves certain admitted truths. An analytic proof begins by an assumption, upon which a synthetic reasoning is founded. The Greeks distinguished theoretic from problematic analysis. A theoretic analysis is of the following kind. To prove that A is B, assume first that A is B. If so, then, since B is C and C is D and D is E, therefore A is E. If this be known a falsity, A is not B. But if this be a known truth and all the intermediate propositions be convertible, then the reverse process, A is E, E is D, D is C, C is B, therefore A is B, constitutes a synthetic proof of the original theorem. Problematic analysis is applied in all cases where it is proposed to construct a figure which is assumed to satisfy a given condition. The problem is then converted into some theorem which is involved in the condition and which is proved synthetically, and the steps of this synthetic proof taken backwards are a synthetic solution of the problem. Music Musical analysis – a process attempting to answer the question "How does this music work?" Musical Analysis is a study of how the composers use the notes together to compose music. Those studying music will find differences with each composer's musical analysis, which differs depending on the culture and history of music studied. An analysis of music is meant to simplify the music for you. Schenkerian analysis Schenkerian analysis is a collection of music analysis that focuses on the production of the graphic representation. This includes both analytical procedure as well as the notational style. Simply put, it analyzes tonal music which includes all chords and tones within a composition. Philosophy Philosophical analysis – a general term for the techniques used by philosophers Philosophical analysis refers to the clarification and composition of words put together and the entailed meaning behind them. Philosophical analysis dives deeper into the meaning of words and seeks to clarify that meaning by contrasting the various definitions. It is the study of reality, justification of claims, and the analysis of various concepts. Branches of philosophy include logic, justification, metaphysics, values and ethics. If questions can be answered empirically, meaning it can be answered by using the senses, then it is not considered philosophical. Non-philosophical questions also include events that happened in the past, or questions science or mathematics can answer. Analysis is the name of a prominent journal in philosophy. Psychotherapy Psychoanalysis – seeks to elucidate connections among unconscious components of patients' mental processes Transactional analysis Transactional analysis is used by therapists to try to gain a better understanding of the unconscious. It focuses on understanding and intervening human behavior. Policy Policy analysis – The use of statistical data to predict the effects of policy decisions made by governments and agencies Policy analysis includes a systematic process to find the most efficient and effective option to address the current situation. Qualitative analysis – The use of anecdotal evidence to predict the effects of policy decisions or, more generally, influence policy decisions Signal processing Finite element analysis – a computer simulation technique used in engineering analysis Independent component analysis Link quality analysis – the analysis of signal quality Path quality analysis Fourier analysis Statistics In statistics, the term analysis may refer to any method used for data analysis. Among the many such methods, some are: Analysis of variance (ANOVA) – a collection of statistical models and their associated procedures which compare means by splitting the overall observed variance into different parts Boolean analysis – a method to find deterministic dependencies between variables in a sample, mostly used in exploratory data analysis Cluster analysis – techniques for finding groups (called clusters), based on some measure of proximity or similarity Factor analysis – a method to construct models describing a data set of observed variables in terms of a smaller set of unobserved variables (called factors) Meta-analysis – combines the results of several studies that address a set of related research hypotheses Multivariate analysis – analysis of data involving several variables, such as by factor analysis, regression analysis, or principal component analysis Principal component analysis – transformation of a sample of correlated variables into uncorrelated variables (called principal components), mostly used in exploratory data analysis Regression analysis – techniques for analysing the relationships between several predictive variables and one or more outcomes in the data Scale analysis (statistics) – methods to analyse survey data by scoring responses on a numeric scale Sensitivity analysis – the study of how the variation in the output of a model depends on variations in the inputs Sequential analysis – evaluation of sampled data as it is collected, until the criterion of a stopping rule is met Spatial analysis – the study of entities using geometric or geographic properties Time-series analysis – methods that attempt to understand a sequence of data points spaced apart at uniform time intervals Other Aura analysis – a technique in which supporters of the method claim that the body's aura, or energy field is analysed Bowling analysis – Analysis of the performance of cricket players Lithic analysis – the analysis of stone tools using basic scientific techniques Lithic analysis is most often used by archeologists in determining which types of tools were used at a given time period pertaining to current artifacts discovered. Protocol analysis – a means for extracting persons' thoughts while they are performing a task See also Formal analysis Metabolism in biology Methodology Scientific method References External links Abstraction Critical thinking skills Emergence Empiricism Epistemological theories Intelligence Mathematical modeling Metaphysics of mind Methodology Ontology Philosophy of logic Rationalism Reasoning Research methods Scientific method Theory of mind

1140

https://en.wikipedia.org/wiki/Amplitude%20modulation

Amplitude modulation

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation. AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. This original form of AM is sometimes called double-sideband amplitude modulation (DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the sidebands and possibly the carrier signal, which improves the ratio of message power to total transmission power, reduces power handling requirements of line repeaters, and permits better bandwidth utilization of the transmission medium. AM remains in use in many forms of communication in addition to AM broadcasting: shortwave radio, amateur radio, two-way radios, VHF aircraft radio, citizens band radio, and in computer modems in the form of QAM. Foundation In electronics, telecommunications and mechanics, modulation means varying some aspect of a continuous wave carrier signal with an information-bearing modulation waveform, such as an audio signal which represents sound, or a video signal which represents images. In this sense, the carrier wave, which has a much higher frequency than the message signal, carries the information. At the receiving station, the message signal is extracted from the modulated carrier by demodulation. In general form, a modulation process of a sinusoidal carrier wave may be described by the following equation: . A(t) represents the time-varying amplitude of the sinusoidal carrier wave and the cosine-term is the carrier at its angular frequency , and the instantaneous phase deviation . This description directly provides the two major groups of modulation, amplitude modulation and angle modulation. In angle modulation, the term A(t) is constant and the second term of the equation has a functional relationship to the modulating message signal. Angle modulation provides two methods of modulation, frequency modulation and phase modulation. In amplitude modulation, the angle term is held constant and the first term, A(t), of the equation has a functional relationship to the modulating message signal. The modulating message signal may be analog in nature, or it may be a digital signal, in which case the technique is generally called amplitude-shift keying. For example, in AM radio communication, a continuous wave radio-frequency signal has its amplitude modulated by an audio waveform before transmission. The message signal determines the envelope of the transmitted waveform. In the frequency domain, amplitude modulation produces a signal with power concentrated at the carrier frequency and two adjacent sidebands. Each sideband is equal in bandwidth to that of the modulating signal, and is a mirror image of the other. Standard AM is thus sometimes called "double-sideband amplitude modulation" (DSBAM). A disadvantage of all amplitude modulation techniques, not only standard AM, is that the receiver amplifies and detects noise and electromagnetic interference in equal proportion to the signal. Increasing the received signal-to-noise ratio, say, by a factor of 10 (a 10 decibel improvement), thus would require increasing the transmitter power by a factor of 10. This is in contrast to frequency modulation (FM) and digital radio where the effect of such noise following demodulation is strongly reduced so long as the received signal is well above the threshold for reception. For this reason AM broadcast is not favored for music and high fidelity broadcasting, but rather for voice communications and broadcasts (sports, news, talk radio etc.). AM is also inefficient in power usage; at least two-thirds of the power is concentrated in the carrier signal. The carrier signal contains none of the original information being transmitted (voice, video, data, etc.). However its presence provides a simple means of demodulation using envelope detection, providing a frequency and phase reference to extract the modulation from the sidebands. In some modulation systems based on AM, a lower transmitter power is required through partial or total elimination of the carrier component, however receivers for these signals are more complex because they must provide a precise carrier frequency reference signal (usually as shifted to the intermediate frequency) from a greatly reduced "pilot" carrier (in reduced-carrier transmission or DSB-RC) to use in the demodulation process. Even with the carrier totally eliminated in double-sideband suppressed-carrier transmission, carrier regeneration is possible using a Costas phase-locked loop. This does not work for single-sideband suppressed-carrier transmission (SSB-SC), leading to the characteristic "Donald Duck" sound from such receivers when slightly detuned. Single-sideband AM is nevertheless used widely in amateur radio and other voice communications because it has power and bandwidth efficiency (cutting the RF bandwidth in half compared to standard AM). On the other hand, in medium wave and short wave broadcasting, standard AM with the full carrier allows for reception using inexpensive receivers. The broadcaster absorbs the extra power cost to greatly increase potential audience. Shift keying A simple form of digital amplitude modulation which can be used for transmitting binary data is on–off keying, the simplest form of amplitude-shift keying, in which ones and zeros are represented by the presence or absence of a carrier. On–off keying is likewise used by radio amateurs to transmit Morse code where it is known as continuous wave (CW) operation, even though the transmission is not strictly "continuous." A more complex form of AM, quadrature amplitude modulation is now more commonly used with digital data, while making more efficient use of the available bandwidth. Analog telephony A simple form of amplitude modulation is the transmission of speech signals from a traditional analog telephone set using a common battery local loop. The direct current provided by the central office battery is a carrier with a frequency of 0 Hz. It is modulated by a microphone (transmitter) in the telephone set according to the acoustic signal from the speaker. The result is a varying amplitude direct current, whose AC-component is the speech signal extracted at the central office for transmission to another subscriber. Amplitude reference An additional function provided by the carrier in standard AM, but which is lost in either single or double-sideband suppressed-carrier transmission, is that it provides an amplitude reference. In the receiver, the automatic gain control (AGC) responds to the carrier so that the reproduced audio level stays in a fixed proportion to the original modulation. On the other hand, with suppressed-carrier transmissions there is no transmitted power during pauses in the modulation, so the AGC must respond to peaks of the transmitted power during peaks in the modulation. This typically involves a so-called fast attack, slow decay circuit which holds the AGC level for a second or more following such peaks, in between syllables or short pauses in the program. This is very acceptable for communications radios, where compression of the audio aids intelligibility. However it is absolutely undesired for music or normal broadcast programming, where a faithful reproduction of the original program, including its varying modulation levels, is expected. ITU type designations In 1982, the International Telecommunication Union (ITU) designated the types of amplitude modulation: History Amplitude modulation was used in experiments of multiplex telegraph and telephone transmission in the late 1800s. However, the practical development of this technology is identified with the period between 1900 and 1920 of radiotelephone transmission, that is, the effort to send audio signals by radio waves. The first radio transmitters, called spark gap transmitters, transmitted information by wireless telegraphy, using pulses of the carrier wave to spell out text messages in Morse code. They could not transmit audio because the carrier consisted of strings of damped waves, pulses of radio waves that declined to zero, and sounded like a buzz in receivers. In effect they were already amplitude modulated. Continuous waves The first AM transmission was made by Canadian researcher Reginald Fessenden on 23 December 1900 using a spark gap transmitter with a specially designed high frequency 10 kHz interrupter, over a distance of one mile (1.6 km) at Cobb Island, Maryland, US. His first transmitted words were, "Hello. One, two, three, four. Is it snowing where you are, Mr. Thiessen?". The words were barely intelligible above the background buzz of the spark. Fessenden was a significant figure in the development of AM radio. He was one of the first researchers to realize, from experiments like the above, that the existing technology for producing radio waves, the spark transmitter, was not usable for amplitude modulation, and that a new kind of transmitter, one that produced sinusoidal continuous waves, was needed. This was a radical idea at the time, because experts believed the impulsive spark was necessary to produce radio frequency waves, and Fessenden was ridiculed. He invented and helped develop one of the first continuous wave transmitters – the Alexanderson alternator, with which he made what is considered the first AM public entertainment broadcast on Christmas Eve, 1906. He also discovered the principle on which AM is based, heterodyning, and invented one of the first detectors able to rectify and receive AM, the electrolytic detector or "liquid baretter", in 1902. Other radio detectors invented for wireless telegraphy, such as the Fleming valve (1904) and the crystal detector (1906) also proved able to rectify AM signals, so the technological hurdle was generating AM waves; receiving them was not a problem. Early technologies Early experiments in AM radio transmission, conducted by Fessenden, Valdemar Poulsen, Ernst Ruhmer, Quirino Majorana, Charles Herrold, and Lee de Forest, were hampered by the lack of a technology for amplification. The first practical continuous wave AM transmitters were based on either the huge, expensive Alexanderson alternator, developed 1906–1910, or versions of the Poulsen arc transmitter (arc converter), invented in 1903. The modifications necessary to transmit AM were clumsy and resulted in very low quality audio. Modulation was usually accomplished by a carbon microphone inserted directly in the antenna or ground wire; its varying resistance varied the current to the antenna. The limited power handling ability of the microphone severely limited the power of the first radiotelephones; many of the microphones were water-cooled. Vacuum tubes The 1912 discovery of the amplifying ability of the Audion tube, invented in 1906 by Lee de Forest, solved these problems. The vacuum tube feedback oscillator, invented in 1912 by Edwin Armstrong and Alexander Meissner, was a cheap source of continuous waves and could be easily modulated to make an AM transmitter. Modulation did not have to be done at the output but could be applied to the signal before the final amplifier tube, so the microphone or other audio source didn't have to modulate a high-power radio signal. Wartime research greatly advanced the art of AM modulation, and after the war the availability of cheap tubes sparked a great increase in the number of radio stations experimenting with AM transmission of news or music. The vacuum tube was responsible for the rise of AM broadcasting around 1920, the first electronic mass communication medium. Amplitude modulation was virtually the only type used for radio broadcasting until FM broadcasting began after World War II. At the same time as AM radio began, telephone companies such as AT&T were developing the other large application for AM: sending multiple telephone calls through a single wire by modulating them on separate carrier frequencies, called frequency division multiplexing. Single-sideband In 1915, John Renshaw Carson formulated the first mathematical description of amplitude modulation, showing that a signal and carrier frequency combined in a nonlinear device creates a sideband on both sides of the carrier frequency. Passing the modulated signal through another nonlinear device can extract the original baseband signal. His analysis also showed that only one sideband was necessary to transmit the audio signal, and Carson patented single-sideband modulation (SSB) on 1 December 1915. This advanced variant of amplitude modulation was adopted by AT&T for longwave transatlantic telephone service beginning 7 January 1927. After WW-II, it was developed for military aircraft communication. Analysis The carrier wave (sine wave) of frequency fc and amplitude A is expressed by . The message signal, such as an audio signal that is used for modulating the carrier, is m(t), and has a frequency fm, much lower than fc: , where m is the amplitude sensitivity, M is the amplitude of modulation. If m < 1, (1 + m(t)/A) is always positive for undermodulation. If m > 1 then overmodulation occurs and reconstruction of message signal from the transmitted signal would lead in loss of original signal. Amplitude modulation results when the carrier c(t) is multiplied by the positive quantity (1 + m(t)/A): In this simple case m is identical to the modulation index, discussed below. With m = 0.5 the amplitude modulated signal y(t) thus corresponds to the top graph (labelled "50% Modulation") in figure 4. Using prosthaphaeresis identities, y(t) can be shown to be the sum of three sine waves: Therefore, the modulated signal has three components: the carrier wave c(t) which is unchanged in frequency, and two sidebands with frequencies slightly above and below the carrier frequency fc. Spectrum A useful modulation signal m(t) is usually more complex than a single sine wave, as treated above. However, by the principle of Fourier decomposition, m(t) can be expressed as the sum of a set of sine waves of various frequencies, amplitudes, and phases. Carrying out the multiplication of 1 + m(t) with c(t) as above, the result consists of a sum of sine waves. Again, the carrier c(t) is present unchanged, but each frequency component of m at fi has two sidebands at frequencies fc + fi and fc – fi. The collection of the former frequencies above the carrier frequency is known as the upper sideband, and those below constitute the lower sideband. The modulation m(t) may be considered to consist of an equal mix of positive and negative frequency components, as shown in the top of figure 2. One can view the sidebands as that modulation m(t) having simply been shifted in frequency by fc as depicted at the bottom right of figure 2. The short-term spectrum of modulation, changing as it would for a human voice for instance, the frequency content (horizontal axis) may be plotted as a function of time (vertical axis), as in figure 3. It can again be seen that as the modulation frequency content varies, an upper sideband is generated according to those frequencies shifted above the carrier frequency, and the same content mirror-imaged in the lower sideband below the carrier frequency. At all times, the carrier itself remains constant, and of greater power than the total sideband power. Power and spectrum efficiency The RF bandwidth of an AM transmission (refer to figure 2, but only considering positive frequencies) is twice the bandwidth of the modulating (or "baseband") signal, since the upper and lower sidebands around the carrier frequency each have a bandwidth as wide as the highest modulating frequency. Although the bandwidth of an AM signal is narrower than one using frequency modulation (FM), it is twice as wide as single-sideband techniques; it thus may be viewed as spectrally inefficient. Within a frequency band, only half as many transmissions (or "channels") can thus be accommodated. For this reason analog television employs a variant of single-sideband (known as vestigial sideband, somewhat of a compromise in terms of bandwidth) in order to reduce the required channel spacing. Another improvement over standard AM is obtained through reduction or suppression of the carrier component of the modulated spectrum. In figure 2 this is the spike in between the sidebands; even with full (100%) sine wave modulation, the power in the carrier component is twice that in the sidebands, yet it carries no unique information. Thus there is a great advantage in efficiency in reducing or totally suppressing the carrier, either in conjunction with elimination of one sideband (single-sideband suppressed-carrier transmission) or with both sidebands remaining (double sideband suppressed carrier). While these suppressed carrier transmissions are efficient in terms of transmitter power, they require more sophisticated receivers employing synchronous detection and regeneration of the carrier frequency. For that reason, standard AM continues to be widely used, especially in broadcast transmission, to allow for the use of inexpensive receivers using envelope detection. Even (analog) television, with a (largely) suppressed lower sideband, includes sufficient carrier power for use of envelope detection. But for communications systems where both transmitters and receivers can be optimized, suppression of both one sideband and the carrier represent a net advantage and are frequently employed. A technique used widely in broadcast AM transmitters is an application of the Hapburg carrier, first proposed in the 1930s but impractical with the technology then available. During periods of low modulation the carrier power would be reduced and would return to full power during periods of high modulation levels. This has the effect of reducing the overall power demand of the transmitter and is most effective on speech type programmes. Various trade names are used for its implementation by the transmitter manufacturers from the late 80's onwards. Modulation index The AM modulation index is a measure based on the ratio of the modulation excursions of the RF signal to the level of the unmodulated carrier. It is thus defined as: where and are the modulation amplitude and carrier amplitude, respectively; the modulation amplitude is the peak (positive or negative) change in the RF amplitude from its unmodulated value. Modulation index is normally expressed as a percentage, and may be displayed on a meter connected to an AM transmitter. So if , carrier amplitude varies by 50% above (and below) its unmodulated level, as is shown in the first waveform, below. For , it varies by 100% as shown in the illustration below it. With 100% modulation the wave amplitude sometimes reaches zero, and this represents full modulation using standard AM and is often a target (in order to obtain the highest possible signal-to-noise ratio) but mustn't be exceeded. Increasing the modulating signal beyond that point, known as overmodulation, causes a standard AM modulator (see below) to fail, as the negative excursions of the wave envelope cannot become less than zero, resulting in distortion ("clipping") of the received modulation. Transmitters typically incorporate a limiter circuit to avoid overmodulation, and/or a compressor circuit (especially for voice communications) in order to still approach 100% modulation for maximum intelligibility above the noise. Such circuits are sometimes referred to as a vogad. However it is possible to talk about a modulation index exceeding 100%, without introducing distortion, in the case of double-sideband reduced-carrier transmission. In that case, negative excursions beyond zero entail a reversal of the carrier phase, as shown in the third waveform below. This cannot be produced using the efficient high-level (output stage) modulation techniques (see below) which are widely used especially in high power broadcast transmitters. Rather, a special modulator produces such a waveform at a low level followed by a linear amplifier. What's more, a standard AM receiver using an envelope detector is incapable of properly demodulating such a signal. Rather, synchronous detection is required. Thus double-sideband transmission is generally not referred to as "AM" even though it generates an identical RF waveform as standard AM as long as the modulation index is below 100%. Such systems more often attempt a radical reduction of the carrier level compared to the sidebands (where the useful information is present) to the point of double-sideband suppressed-carrier transmission where the carrier is (ideally) reduced to zero. In all such cases the term "modulation index" loses its value as it refers to the ratio of the modulation amplitude to a rather small (or zero) remaining carrier amplitude. Modulation methods Modulation circuit designs may be classified as low- or high-level (depending on whether they modulate in a low-power domain—followed by amplification for transmission—or in the high-power domain of the transmitted signal). Low-level generation In modern radio systems, modulated signals are generated via digital signal processing (DSP). With DSP many types of AM are possible with software control (including DSB with carrier, SSB suppressed-carrier and independent sideband, or ISB). Calculated digital samples are converted to voltages with a digital-to-analog converter, typically at a frequency less than the desired RF-output frequency. The analog signal must then be shifted in frequency and linearly amplified to the desired frequency and power level (linear amplification must be used to prevent modulation distortion). This low-level method for AM is used in many Amateur Radio transceivers. AM may also be generated at a low level, using analog methods described in the next section. High-level generation High-power AM transmitters (such as those used for AM broadcasting) are based on high-efficiency class-D and class-E power amplifier stages, modulated by varying the supply voltage. Older designs (for broadcast and amateur radio) also generate AM by controlling the gain of the transmitter's final amplifier (generally class-C, for efficiency). The following types are for vacuum tube transmitters (but similar options are available with transistors): Plate modulation In plate modulation, the plate voltage of the RF amplifier is modulated with the audio signal. The audio power requirement is 50 percent of the RF-carrier power. Heising (constant-current) modulation RF amplifier plate voltage is fed through a choke (high-value inductor). The AM modulation tube plate is fed through the same inductor, so the modulator tube diverts current from the RF amplifier. The choke acts as a constant current source in the audio range. This system has a low power efficiency. Control grid modulation The operating bias and gain of the final RF amplifier can be controlled by varying the voltage of the control grid. This method requires little audio power, but care must be taken to reduce distortion. Clamp tube (screen grid) modulation The screen-grid bias may be controlled through a clamp tube, which reduces voltage according to the modulation signal. It is difficult to approach 100-percent modulation while maintaining low distortion with this system. Doherty modulation One tube provides the power under carrier conditions and another operates only for positive modulation peaks. Overall efficiency is good, and distortion is low. Outphasing modulation Two tubes are operated in parallel, but partially out of phase with each other. As they are differentially phase modulated their combined amplitude is greater or smaller. Efficiency is good and distortion low when properly adjusted. Pulse-width modulation (PWM) or pulse-duration modulation (PDM) A highly efficient high voltage power supply is applied to the tube plate. The output voltage of this supply is varied at an audio rate to follow the program. This system was pioneered by Hilmer Swanson and has a number of variations, all of which achieve high efficiency and sound quality. Digital methods The Harris Corporation obtained a patent for synthesizing a modulated high-power carrier wave from a set of digitally selected low-power amplifiers, running in phase at the same carrier frequency. The input signal is sampled by a conventional audio analog-to-digital converter (ADC), and fed to a digital exciter, which modulates overall transmitter output power by switching a series of low-power solid-state RF amplifiers on and off. The combined output drives the antenna system. Demodulation methods The simplest form of AM demodulator consists of a diode which is configured to act as envelope detector. Another type of demodulator, the product detector, can provide better-quality demodulation with additional circuit complexity. See also AM stereo Shortwave radio Amplitude modulation signalling system (AMSS) Modulation sphere Types of radio emissions Airband DSB-SC References Bibliography Newkirk, David and Karlquist, Rick (2004). Mixers, modulators and demodulators. In D. G. Reed (ed.), The ARRL Handbook for Radio Communications (81st ed.), pp. 15.1–15.36. Newington: ARRL. . External links Amplitude Modulation by Jakub Serych, Wolfram Demonstrations Project. Amplitude Modulation, by S Sastry. Amplitude Modulation, an introduction by Federation of American Scientists. Amplitude Modulation tutorial including related topics of modulators, demodulators, etc... Analog Modulation online interactive demonstration using Python in Google Colab Platform, by C Foh. Radio modulation modes

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https://en.wikipedia.org/wiki/Ardipithecus

Ardipithecus

Ardipithecus is a genus of an extinct hominine that lived during the Late Miocene and Early Pliocene epochs in the Afar Depression, Ethiopia. Originally described as one of the earliest ancestors of humans after they diverged from the chimpanzees, the relation of this genus to human ancestors and whether it is a hominin is now a matter of debate. Two fossil species are described in the literature: A. ramidus, which lived about 4.4 million years ago during the early Pliocene, and A. kadabba, dated to approximately 5.6 million years ago (late Miocene). Initial behavioral analysis indicated that Ardipithecus could be very similar to chimpanzees, however more recent analysis based on canine size and lack of canine sexual dimorphism indicates that Ardipithecus was characterised by reduced aggression, and that they more closely resemble bonobos. Some analyses describe Australopithecus as being sister to Ardipithecus ramidus specifically. This means that Australopithecus is distinctly closer related to Ardipithecus ramidus than Ardipithecus kadabba. Cladistically, then, Australopithecus (and eventually Homo sapiens) indeed emerged within the Ardipithecus lineage, and this lineage is not literally extinct. Ardipithecus ramidus A. ramidus was named in September 1994. The first fossil found was dated to 4.4 million years ago on the basis of its stratigraphic position between two volcanic strata: the basal Gaala Tuff Complex (G.A.T.C.) and the Daam Aatu Basaltic Tuff (D.A.B.T.). The name Ardipithecus ramidus stems mostly from the Afar language, in which Ardi means "ground/floor" and ramid means "root". The pithecus portion of the name is from the Greek word for "ape". Like most hominids, but unlike all previously recognized hominins, it had a grasping hallux or big toe adapted for locomotion in the trees. It is not confirmed how many other features of its skeleton reflect adaptation to bipedalism on the ground as well. Like later hominins, Ardipithecus had reduced canine teeth and reduced canine sexual dimorphism. In 1992–1993 a research team headed by Tim White discovered the first A. ramidus fossils—seventeen fragments including skull, mandible, teeth and arm bones—from the Afar Depression in the Middle Awash river valley of Ethiopia. More fragments were recovered in 1994, amounting to 45% of the total skeleton. This fossil was originally described as a species of Australopithecus, but White and his colleagues later published a note in the same journal renaming the fossil under a new genus, Ardipithecus. Between 1999 and 2003, a multidisciplinary team led by Sileshi Semaw discovered bones and teeth of nine A. ramidus individuals at As Duma in the Gona area of Ethiopia's Afar Region. The fossils were dated to between 4.35 and 4.45 million years old. Ardipithecus ramidus had a small brain, measuring between 300 and 350 cm3. This is slightly smaller than a modern bonobo or female chimpanzee brain, but much smaller than the brain of australopithecines like Lucy (~400 to 550 cm3) and roughly 20% the size of the modern Homo sapiens brain. Like common chimpanzees, A. ramidus was much more prognathic than modern humans. The teeth of A. ramidus lacked the specialization of other apes, and suggest that it was a generalized omnivore and frugivore (fruit eater) with a diet that did not depend heavily on foliage, fibrous plant material (roots, tubers, etc.), or hard and or abrasive food. The size of the upper canine tooth in A. ramidus males was not distinctly different from that of females. Their upper canines were less sharp than those of modern common chimpanzees in part because of this decreased upper canine size, as larger upper canines can be honed through wear against teeth in the lower mouth. The features of the upper canine in A. ramidus contrast with the sexual dimorphism observed in common chimpanzees, where males have significantly larger and sharper upper canine teeth than females. Of the living apes, bonobos have the smallest canine sexual dimorphism, although still greater than that displayed by A. ramidus. The less pronounced nature of the upper canine teeth in A. ramidus has been used to infer aspects of the social behavior of the species and more ancestral hominids. In particular, it has been used to suggest that the last common ancestor of hominids and African apes was characterized by relatively little aggression between males and between groups. This is markedly different from social patterns in common chimpanzees, among which intermale and intergroup aggression are typically high. Researchers in a 2009 study said that this condition "compromises the living chimpanzee as a behavioral model for the ancestral hominid condition." Bonobo canine size and canine sexual dimorphism more closely resembles that of A. ramidus, and as a result, bonobos are now suggested as a behavioural model. A. ramidus existed more recently than the most recent common ancestor of humans and chimpanzees (CLCA or Pan-Homo LCA) and thus is not fully representative of that common ancestor. Nevertheless, it is in some ways unlike chimpanzees, suggesting that the common ancestor differs from the modern chimpanzee. After the chimpanzee and human lineages diverged, both underwent substantial evolutionary change. Chimp feet are specialized for grasping trees; A. ramidus feet are better suited for walking. The canine teeth of A. ramidus are smaller, and equal in size between males and females, which suggests reduced male-to-male conflict, increased pair-bonding, and increased parental investment. "Thus, fundamental reproductive and social behavioral changes probably occurred in hominids long before they had enlarged brains and began to use stone tools," the research team concluded. Ardi On October 1, 2009, paleontologists formally announced the discovery of the relatively complete A. ramidus fossil skeleton first unearthed in 1994. The fossil is the remains of a small-brained 50-kilogram (110 lb) female, nicknamed "Ardi", and includes most of the skull and teeth, as well as the pelvis, hands, and feet. It was discovered in Ethiopia's harsh Afar desert at a site called Aramis in the Middle Awash region. Radiometric dating of the layers of volcanic ash encasing the deposits suggest that Ardi lived about 4.3-4.5 million years ago. This date, however, has been questioned by others. Fleagle and Kappelman suggest that the region in which Ardi was found is difficult to date radiometrically, and they argue that Ardi should be dated at 3.9 million years. The fossil is regarded by its describers as shedding light on a stage of human evolution about which little was known, more than a million years before Lucy (Australopithecus afarensis), the iconic early human ancestor candidate who lived 3.2 million years ago, and was discovered in 1974 just away from Ardi's discovery site. However, because the "Ardi" skeleton is no more than 200,000 years older than the earliest fossils of Australopithecus, and may in fact be younger than they are, some researchers doubt that it can represent a direct ancestor of Australopithecus. Some researchers infer from the form of her pelvis and limbs and the presence of her abductable hallux, that "Ardi" was a facultative biped: bipedal when moving on the ground, but quadrupedal when moving about in tree branches. A. ramidus had a more primitive walking ability than later hominids, and could not walk or run for long distances. The teeth suggest omnivory, and are more generalised than those of modern apes. Ardipithecus kadabba Ardipithecus kadabba is "known only from teeth and bits and pieces of skeletal bones", and is dated to approximately 5.6 million years ago. It has been described as a "probable chronospecies" (i.e. ancestor) of A. ramidus. Although originally considered a subspecies of A. ramidus, in 2004 anthropologists Yohannes Haile-Selassie, Gen Suwa, and Tim D. White published an article elevating A. kadabba to species level on the basis of newly discovered teeth from Ethiopia. These teeth show "primitive morphology and wear pattern" which demonstrate that A. kadabba is a distinct species from A. ramidus. The specific name comes from the Afar word for "basal family ancestor". Classification Due to several shared characteristics with chimpanzees, its closeness to ape divergence period, and due to its fossil incompleteness, the exact position of Ardipithecus in the fossil record is a subject of controversy. Primatologist Esteban Sarmiento had systematically compared and concluded that there is not sufficient anatomical evidence to support an exclusively human lineage. Sarmiento noted that Ardipithecus does not share any characteristics exclusive to humans, and some of its characteristics (those in the wrist and basicranium) suggest it diverged from humans prior to the human–gorilla last common ancestor. His comparative (narrow allometry) study in 2011 on the molar and body segment lengths (which included living primates of similar body size) noted that some dimensions including short upper limbs, and metacarpals are reminiscent of humans, but other dimensions such as long toes and relative molar surface area are great ape-like. Sarmiento concluded that such length measures can change back and forth during evolution and are not very good indicators of relatedness (homoplasy). However, some later studies still argue for its classification in the human lineage. In 2014, it was reported that the hand bones of Ardipithecus, Australopithecus sediba and A. afarensis have the third metacarpal styloid process, which is absent in other apes. Unique brain organisations (such as lateral shift of the carotid foramina, mediolateral abbreviation of the lateral tympanic, and a shortened, trapezoidal basioccipital element) in Ardipithecus are also found only in the Australopithecus and Homo. Comparison of the tooth root morphology with those of the earlier Sahelanthropus also indicated strong resemblance, also pointing to inclusion to the human line. Evolutionary tree according to a 2019 study: Paleobiology The Ardipithecus length measures are good indicators of function and together with dental isotope data and the fauna and flora from the fossil site indicate Ardipithecus was mainly a terrestrial quadruped collecting a large portion of its food on the ground. Its arboreal behaviors would have been limited and suspension from branches solely from the upper limbs rare. A comparative study in 2013 on carbon and oxygen stable isotopes within modern and fossil tooth enamel revealed that Ardipithecus fed both arboreally (on trees) and on the ground in a more open habitat, unlike chimpanzees. In 2015, Australian anthropologists Gary Clark and Maciej Henneberg said that Ardipithecus adults have a facial anatomy more similar to chimpanzee subadults than adults, with a less-projecting face and smaller canines (large canines in primate males are used to compete within mating hierarchies), and attributed this to a decrease in craniofacial growth in favour of brain growth. This is only seen in humans, so they argued that the species may show the first trend towards human social, parenting and sexual psychology. Previously, it was assumed that such ancient human ancestors behaved much like chimps, but this is no longer considered to be a viable comparison. This view has yet to be corroborated by more detailed studies of the growth of A.ramidus. The study also provides support for Stephen Jay Gould's theory in Ontogeny and Phylogeny that the paedomorphic (childlike) form of early hominin craniofacial morphology results from dissociation of growth trajectories. Clark and Henneberg also argued that such shortening of the skull—which may have caused a descension of the larynx—as well as lordosis—allowing better movement of the larynx—increased vocal ability, significantly pushing back the origin of language to well before the evolution of Homo. They argued that self domestication was aided by the development of vocalization, living in a pro-social society. They conceded that chimps and A. ramidus likely had the same vocal capabilities, but said that A. ramidus made use of more complex vocalizations, and vocalized at the same level as a human infant due to selective pressure to become more social. This would have allowed their society to become more complex. They also noted that the base of the skull stopped growing with the brain by the end of juvenility, whereas in chimps it continues growing with the rest of the body into adulthood; and considered this evidence of a switch from a gross skeletal anatomy trajectory to a neurological development trajectory due to selective pressure for sociability. Nonetheless, their conclusions are highly speculative. According to Scott Simpson, the Gona Project's physical anthropologist, the fossil evidence from the Middle Awash indicates that both A. kadabba and A. ramidus lived in "a mosaic of woodland and grasslands with lakes, swamps and springs nearby," but further research is needed to determine which habitat Ardipithecus at Gona preferred. Anatomically, Ardi is closer to the orangutan than to the chimpanzee, bonobo or gorilla. All three are adapted for knuckle walking on the forest floor and climbing trees. The orangutan spends virtually its entire life in the forest canopy. Its anatomy allows for maximum reach by its upper limbs for overhead branches while its lower limbs have a narrow stance that enables it to balance while walking "foot over foot" on lower branches and vines. Although not as closely related genetically as the knuckle walking apes, this would indicate that Ardi was behaviourly more similar to the orangutan than to the other three great apes. In nature, the orangutan is widely dispersed. There is one dominant male in a territory with wide cheek flaps who maintains contact with others in his territory by vocalizations. The female raises offspring one at a time with a maturation period of about eight years. This is the longest maturation period of any of the apes. During this period, the offspring learns the intricate task of weaving a sleeping platform. Rescue centers are now raising young orangutans that have lost their mother typically from deforestation. They are raised in age cohorts by these centers to learn the necessary skills to be able to be released into the forest. While in these cohorts, they show social behavior reminiscent of age appropriate behavior of human children. This suggests that Ardi was physically preadapted for bipedal locomotion as well as social behavior. See also Australopithecus Paranthropus Graecopithecus List of human evolution fossils Orrorin Sahelanthropus References External links Science Magazine: Ardipithecus special (requires free registration) The Smithsonian Institution's Human Origins Program: Ardipithecus kadabba Ardipithecus ramidus Ardipithecus ramidus at Archaeology info Explore Ardipithecus at NationalGeographic.com Ardipithecus ramidus - Science Journal Article Discovering Ardi - Discovery Channel Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016). Hominini Prehistoric primate genera Pliocene primates Transitional fossils Fossil taxa described in 1995 Prehistoric Ethiopia Miocene genus first appearances Zanclean extinctions

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https://en.wikipedia.org/wiki/Assembly%20line

Assembly line

An assembly line is a manufacturing process (often called a progressive assembly) in which parts (usually interchangeable parts) are added as the semi-finished assembly moves from workstation to workstation where the parts are added in sequence until the final assembly is produced. By mechanically moving the parts to the assembly work and moving the semi-finished assembly from work station to work station, a finished product can be assembled faster and with less labor than by having workers carry parts to a stationary piece for assembly. Assembly lines are common methods of assembling complex items such as automobiles and other transportation equipment, household appliances and electronic goods. Workers in charge of the works of assembly line are called assemblers. Concepts Assembly lines are designed for the sequential organization of workers, tools or machines, and parts. The motion of workers is minimized to the extent possible. All parts or assemblies are handled either by conveyors or motorized vehicles such as forklifts, or gravity, with no manual trucking. Heavy lifting is done by machines such as overhead cranes or forklifts. Each worker typically performs one simple operation unless job rotation strategies are applied. According to Henry Ford: Designing assembly lines is a well-established mathematical challenge, referred to as an assembly line balancing problem. In the simple assembly line balancing problem the aim is to assign a set of tasks that need to be performed on the workpiece to a sequence of workstations. Each task requires a given task duration for completion. The assignment of tasks to stations is typically limited by two constraints: (1) a precedence graph which indicates what other tasks need to be completed before a particular task can be initiated (e.g. not putting in a screw before drilling the hole) and (2) a cycle time which restricts the sum of task processing times which can be completed at each workstation before the work-piece is moved to the next station by the conveyor belt. Major planning problems for operating assembly lines include supply chain integration, inventory control and production scheduling. Simple example Consider the assembly of a car: assume that certain steps in the assembly line are to install the engine, install the hood, and install the wheels (in that order, with arbitrary interstitial steps); only one of these steps can be done at a time. In traditional production, only one car would be assembled at a time. If engine installation takes 20 minutes, hood installation takes five minutes, and wheels installation takes 10 minutes, then a car can be produced every 35 minutes. In an assembly line, car assembly is split between several stations, all working simultaneously. When a station is finished with a car, it passes it on to the next. By having three stations, three cars can be operated on at the same time, each at a different stage of assembly. After finishing its work on the first car, the engine installation crew can begin working on the second car. While the engine installation crew works on the second car, the first car can be moved to the hood station and fitted with a hood, then to the wheels station and be fitted with wheels. After the engine has been installed on the second car, the second car moves to the hood assembly. At the same time, the third car moves to the engine assembly. When the third car's engine has been mounted, it then can be moved to the hood station; meanwhile, subsequent cars (if any) can be moved to the engine installation station. Assuming no loss of time when moving a car from one station to another, the longest stage on the assembly line determines the throughput (20 minutes for the engine installation) so a car can be produced every 20 minutes, once the first car taking 35 minutes has been produced. History Before the Industrial Revolution, most manufactured products were made individually by hand. A single craftsman or team of craftsmen would create each part of a product. They would use their skills and tools such as files and knives to create the individual parts. They would then assemble them into the final product, making cut-and-try changes in the parts until they fit and could work together (craft production). Division of labor was practiced by Ancient Greeks, Chinese and other ancient civilizations. In Ancient Greece it was discussed by Plato and Xenophon. Adam Smith discussed the division of labour in the manufacture of pins at length in his book The Wealth of Nations (published in 1776). The Venetian Arsenal, dating to about 1104, operated similar to a production line. Ships moved down a canal and were fitted by the various shops they passed. At the peak of its efficiency in the early 16th century, the Arsenal employed some 16,000 people who could apparently produce nearly one ship each day and could fit out, arm, and provision a newly built galley with standardized parts on an assembly-line basis. Although the Arsenal lasted until the early Industrial Revolution, production line methods did not become common even then. Industrial Revolution The Industrial Revolution led to a proliferation of manufacturing and invention. Many industries, notably textiles, firearms, clocks and watches, horse-drawn vehicles, railway locomotives, sewing machines, and bicycles, saw expeditious improvement in materials handling, machining, and assembly during the 19th century, although modern concepts such as industrial engineering and logistics had not yet been named. The automatic flour mill built by Oliver Evans in 1785 was called the beginning of modern bulk material handling by Roe (1916). Evans's mill used a leather belt bucket elevator, screw conveyors, canvas belt conveyors, and other mechanical devices to completely automate the process of making flour. The innovation spread to other mills and breweries. Probably the earliest industrial example of a linear and continuous assembly process is the Portsmouth Block Mills, built between 1801 and 1803. Marc Isambard Brunel (father of Isambard Kingdom Brunel), with the help of Henry Maudslay and others, designed 22 types of machine tools to make the parts for the rigging blocks used by the Royal Navy. This factory was so successful that it remained in use until the 1960s, with the workshop still visible at HM Dockyard in Portsmouth, and still containing some of the original machinery. One of the earliest examples of an almost modern factory layout, designed for easy material handling, was the Bridgewater Foundry. The factory grounds were bordered by the Bridgewater Canal and the Liverpool and Manchester Railway. The buildings were arranged in a line with a railway for carrying the work going through the buildings. Cranes were used for lifting the heavy work, which sometimes weighed in the tens of tons. The work passed sequentially through to erection of framework and final assembly. The first flow assembly line was initiated at the factory of Richard Garrett & Sons, Leiston Works in Leiston in the English county of Suffolk for the manufacture of portable steam engines. The assembly line area was called 'The Long Shop' on account of its length and was fully operational by early 1853. The boiler was brought up from the foundry and put at the start of the line, and as it progressed through the building it would stop at various stages where new parts would be added. From the upper level, where other parts were made, the lighter parts would be lowered over a balcony and then fixed onto the machine on the ground level. When the machine reached the end of the shop, it would be completed. Interchangeable parts During the early 19th century, the development of machine tools such as the screw-cutting lathe, metal planer, and milling machine, and of toolpath control via jigs and fixtures, provided the prerequisites for the modern assembly line by making interchangeable parts a practical reality. Late 19th-century steam and electric conveyors Steam-powered conveyor lifts began being used for loading and unloading ships some time in the last quarter of the 19th century. Hounshell (1984) shows a sketch of an electric-powered conveyor moving cans through a filling line in a canning factory. The meatpacking industry of Chicago is believed to be one of the first industrial assembly lines (or disassembly lines) to be utilized in the United States starting in 1867. Workers would stand at fixed stations and a pulley system would bring the meat to each worker and they would complete one task. Henry Ford and others have written about the influence of this slaughterhouse practice on the later developments at Ford Motor Company. 20th century According to Domm, the implementation of mass production of an automobile via an assembly line may be credited to Ransom Olds, who used it to build the first mass-produced automobile, the Oldsmobile Curved Dash. Olds patented the assembly line concept, which he put to work in his Olds Motor Vehicle Company factory in 1901. At Ford Motor Company, the assembly line was introduced by William "Pa" Klann upon his return from visiting Swift & Company's slaughterhouse in Chicago and viewing what was referred to as the "disassembly line", where carcasses were butchered as they moved along a conveyor. The efficiency of one person removing the same piece over and over without moving to another station caught his attention. He reported the idea to Peter E. Martin, soon to be head of Ford production, who was doubtful at the time but encouraged him to proceed. Others at Ford have claimed to have put the idea forth to Henry Ford, but Pa Klann's slaughterhouse revelation is well documented in the archives at the Henry Ford Museum and elsewhere, making him an important contributor to the modern automated assembly line concept. Ford was appreciative, having visited the highly automated 40-acre Sears mail order handling facility around 1906. At Ford, the process was an evolution by trial and error of a team consisting primarily of Peter E. Martin, the factory superintendent; Charles E. Sorensen, Martin's assistant; Clarence W. Avery; C. Harold Wills, draftsman and toolmaker; Charles Ebender; and József Galamb. Some of the groundwork for such development had recently been laid by the intelligent layout of machine tool placement that Walter Flanders had been doing at Ford up to 1908. The moving assembly line was developed for the Ford Model T and began operation on October 7, 1913, at the Highland Park Ford Plant, and continued to evolve after that, using time and motion study. The assembly line, driven by conveyor belts, reduced production time for a Model T to just 93 minutes by dividing the process into 45 steps. Producing cars quicker than paint of the day could dry, it had an immense influence on the world. In 1922, Ford (through his ghostwriter Crowther) said of his 1913 assembly line: Charles E. Sorensen, in his 1956 memoir My Forty Years with Ford, presented a different version of development that was not so much about individual "inventors" as a gradual, logical development of industrial engineering: As a result of these developments in method, Ford's cars came off the line in three-minute intervals or six feet per minute. This was much faster than previous methods, increasing production by eight to one (requiring 12.5 man-hours before, 1 hour 33 minutes after), while using less manpower. It was so successful, paint became a bottleneck. Only japan black would dry fast enough, forcing the company to drop the variety of colours available before 1914, until fast-drying Duco lacquer was developed in 1926. The assembly line technique was an integral part of the diffusion of the automobile into American society. Decreased costs of production allowed the cost of the Model T to fall within the budget of the American middle class. In 1908, the price of a Model T was around $825, and by 1912 it had decreased to around $575. This price reduction is comparable to a reduction from $15,000 to $10,000 in dollar terms from the year 2000. In 1914, an assembly line worker could buy a Model T with four months' pay. Ford's complex safety procedures—especially assigning each worker to a specific location instead of allowing them to roam about—dramatically reduced the rate of injury. The combination of high wages and high efficiency is called "Fordism", and was copied by most major industries. The efficiency gains from the assembly line also coincided with the take-off of the United States. The assembly line forced workers to work at a certain pace with very repetitive motions which led to more output per worker while other countries were using less productive methods. In the automotive industry, its success was dominating, and quickly spread worldwide. Ford France and Ford Britain in 1911, Ford Denmark 1923, Ford Germany and Ford Japan 1925; in 1919, Vulcan (Southport, Lancashire) was the first native European manufacturer to adopt it. Soon, companies had to have assembly lines, or risk going broke by not being able to compete; by 1930, 250 companies which did not had disappeared. The massive demand for military hardware in World War II prompted assembly-line techniques in shipbuilding and aircraft production. Thousands of Liberty ships were built making extensive use of prefabrication, enabling ship assembly to be completed in weeks or even days. After having produced fewer than 3,000 planes for the United States Military in 1939, American aircraft manufacturers built over 300,000 planes in World War II. Vultee pioneered the use of the powered assembly line for aircraft manufacturing. Other companies quickly followed. As William S. Knudsen (having worked at Ford, GM and the National Defense Advisory Commission) observed, "We won because we smothered the enemy in an avalanche of production, the like of which he had never seen, nor dreamed possible." Improved working conditions In his 1922 autobiography, Henry Ford mentions several benefits of the assembly line including: Workers do not do any heavy lifting. No stooping or bending over. No special training was required. There are jobs that almost anyone can do. Provided employment to immigrants. The gains in productivity allowed Ford to increase worker pay from $1.50 per day to $5.00 per day once employees reached three years of service on the assembly line. Ford continued on to reduce the hourly work week while continuously lowering the Model T price. These goals appear altruistic; however, it has been argued that they were implemented by Ford in order to reduce high employee turnover: when the assembly line was introduced in 1913, it was discovered that "every time the company wanted to add 100 men to its factory personnel, it was necessary to hire 963" in order to counteract the natural distaste the assembly line seems to have inspired. Sociological problems Sociological work has explored the social alienation and boredom that many workers feel because of the repetition of doing the same specialized task all day long. Karl Marx expressed in his theory of alienation the belief that, in order to achieve job satisfaction, workers need to see themselves in the objects they have created, that products should be "mirrors in which workers see their reflected essential nature". Marx viewed labour as a chance for people to externalize facets of their personalities. Marxists argue that performing repetitive, specialized tasks causes a feeling of disconnection between what a worker does all day, who they really are, and what they would ideally be able to contribute to society. Furthermore, Marx views these specialised jobs as insecure, since the worker is expendable as soon as costs rise and technology can replace more expensive human labour. Since workers have to stand in the same place for hours and repeat the same motion hundreds of times per day, repetitive stress injuries are a possible pathology of occupational safety. Industrial noise also proved dangerous. When it was not too high, workers were often prohibited from talking. Charles Piaget, a skilled worker at the LIP factory, recalled that besides being prohibited from speaking, the semi-skilled workers had only 25 centimeters in which to move. Industrial ergonomics later tried to minimize physical trauma. See also Modern Times, a 1936 film featuring the Tramp character (played by Charlie Chaplin) struggling to adapt to assembly line work Final Offer, a documentary film about the 1984 UAW/CAW contract negotiations shows working life on the floor of the GM Oshawa Ontario Car Assembly Plant (Watch Online) Reconfigurable and flexible manufacturing systems, involving Post-Fordism and lean manufacturing-influenced production References Footnotes Works cited External links Homepage for assembly line optimization research Assembly line optimization problems History of the assembly line and its widespread effects Cars Assembly Line Industrial processes Mass production Manufacturing buildings and structures American inventions Culture of Detroit History of science and technology in the United States Articles containing video clips Types of production ca:Producció en cadena

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https://en.wikipedia.org/wiki/Adelaide

Adelaide

Adelaide ( ; ) is the capital city of South Australia, the state's largest city and the fifth-most populous city in Australia. "Adelaide" may refer to either Greater Adelaide (including the Adelaide Hills) or the Adelaide city centre. The demonym Adelaidean is used to denote the city and the residents of Adelaide. The Traditional Owners of the Adelaide region are the Kaurna. The area of the city centre and surrounding Park Lands is called in the Kaurna language. Adelaide is situated on the Adelaide Plains north of the Fleurieu Peninsula, between the Gulf St Vincent in the west and the Mount Lofty Ranges in the east. Its metropolitan area extends from the coast to the foothills of the Mount Lofty Ranges, and stretches from Gawler in the north to Sellicks Beach in the south. Named in honour of Adelaide of Saxe-Meiningen, queen of King William IV, the city was founded in 1836 as the planned capital for the only freely-settled British province in Australia. Colonel William Light, one of Adelaide's founding fathers, designed the city centre and chose its location close to the River Torrens. Light's design, now listed as national heritage, set out the city centre in a grid layout known as "Light's Vision", interspaced by wide boulevards and large public squares, and entirely surrounded by park lands. Early colonial Adelaide was shaped by the diversity and wealth of its free settlers, in contrast to the convict history of other Australian cities. It was Australia's third most populated city until the post-war era. It has been noted for its leading examples of religious freedom and progressive political reforms, and became known as the "City of Churches" due to its diversity of faiths. Today, Adelaide is known by its many festivals and sporting events, its food and wine, its coastline and hills, its large defence and manufacturing sectors and its emerging space sector, including the Australian Space Agency being headquartered here. Adelaide's quality of life has ranked consistently highly in various measures through the 21st century, at one stage being named Australia's most liveable city. As South Australia's government and commercial centre, Adelaide is the site of many governmental and financial institutions. Most of these are concentrated in the city centre along the cultural boulevards of North Terrace and King William Street. History Before European settlement The area around modern-day Adelaide was originally inhabited by the Indigenous Kaurna people, one of many Aboriginal nations in South Australia. The city and parklands area was known as Tarntanya, Tandanya, now the short name of Tandanya National Aboriginal Cultural Institute, Tarndanya, or Tarndanyangga, now the dual name for Victoria Square, in the Kaurna language. The name means 'male red kangaroo rock', referring to a rock formation on the site that has now been destroyed. The surrounding area was an open grassy plain with patches of trees and shrubs which had been managed by hundreds of generations. Kaurna country encompassed the plains which stretched north and south of Tarntanya as well as the wooded foothills of the Mt Lofty Ranges. The River Torrens was known as the Karrawirra Pari (Red Gum forest river). About 300 Kaurna populated the Adelaide area, and were referred to by the settlers as the Cowandilla. There were more than 20 local clans across the plain who lived semi-nomadic lives, with extensive mound settlements where huts were built repeatedly over centuries and a complex social structure including a class of sorcerers separated from regular society. Within a few decades of European settlement of South Australia, Kaurna culture was almost completely destroyed. The last speaker of Kaurna language died in 1929. Extensive documentation by early missionaries and other researchers has enabled a modern revival of both, which has included a commitment by local and state governments to rename or include Kaurna names for many local places. 19th century Based on the ideas of Edward Gibbon Wakefield about colonial reform, Robert Gouger petitioned the British government to create a new colony in Australia, resulting in the passage of the South Australia Act 1834. Physical establishment of the colony began with the arrival of the first British colonisers in February 1836. The first governor proclaimed the commencement of colonial government in South Australia on 28 December 1836, near The Old Gum Tree in what is now the suburb of Glenelg North. The event is commemorated in South Australia as Proclamation Day. The site of the colony's capital was surveyed and laid out by Colonel William Light, the first surveyor-general of South Australia, with his own original, unique, topographically sensitive design. The city was named after Queen Adelaide. Adelaide was established as a planned colony of free immigrants, promising civil liberties and freedom from religious persecution, based upon the ideas of Edward Gibbon Wakefield. Wakefield had read accounts of Australian settlement while in prison in London for attempting to abduct an heiress, and realised that the eastern colonies suffered from a lack of available labour, due to the practice of giving land grants to all arrivals. Wakefield's idea was for the Government to survey and sell the land at a rate that would maintain land values high enough to be unaffordable for labourers and journeymen. Funds raised from the sale of land were to be used to bring out working-class emigrants, who would have to work hard for the monied settlers to ever afford their own land. As a result of this policy, Adelaide does not share the convict settlement history of other Australian cities like Sydney, Brisbane and Hobart. As it was believed that in a colony of free settlers there would be little crime, no provision was made for a gaol in Colonel Light's 1837 plan. But by mid-1837 the South Australian Register was warning of escaped convicts from New South Wales and tenders for a temporary gaol were sought. Following a burglary, a murder, and two attempted murders in Adelaide during March 1838, Governor Hindmarsh created the South Australian Police Force (now the South Australia Police) in April 1838 under 21-year-old Henry Inman. The first sheriff, Samuel Smart, was wounded during a robbery, and on 2 May 1838 one of the offenders, Michael Magee, became the first person to be hanged in South Australia. William Baker Ashton was appointed governor of the temporary gaol in 1839, and in 1840 George Strickland Kingston was commissioned to design Adelaide's new gaol. Construction of Adelaide Gaol commenced in 1841. Adelaide's early history was marked by economic uncertainty and questionable leadership. The first governor of South Australia, John Hindmarsh, clashed frequently with others, in particular the Resident Commissioner, James Hurtle Fisher. The rural area surrounding Adelaide was surveyed by Light in preparation to sell a total of over of land. Adelaide's early economy started to get on its feet in 1838 with the arrival of livestock from Victoria, New South Wales and Tasmania. Wool production provided an early basis for the South Australian economy. By 1860, wheat farms had been established from Encounter Bay in the south to Clare in the north. George Gawler took over from Hindmarsh in late 1838 and, despite being under orders from the Select Committee on South Australia in Britain not to undertake any public works, promptly oversaw construction of a governor's house, the Adelaide Gaol, police barracks, a hospital, a customs house and a wharf at Port Adelaide. Gawler was recalled and replaced by George Edward Grey in 1841. Grey slashed public expenditure against heavy opposition, although its impact was negligible at this point: silver was discovered in Glen Osmond that year, agriculture was well underway, and other mines sprung up all over the state, aiding Adelaide's commercial development. The city exported meat, wool, wine, fruit and wheat by the time Grey left in 1845, contrasting with a low point in 1842 when one-third of Adelaide houses were abandoned. Trade links with the rest of the Australian states were established after the Murray River was successfully navigated in 1853 by Francis Cadell, an Adelaide resident. South Australia became a self-governing colony in 1856 with the ratification of a new constitution by the British parliament. Secret ballots were introduced, and a bicameral parliament was elected on 9 March 1857, by which time 109,917 people lived in the province. In 1860, the Thorndon Park reservoir was opened, providing an alternative water source to the now turbid River Torrens. Gas street lighting was implemented in 1867, the University of Adelaide was founded in 1874, the South Australian Art Gallery opened in 1881 and the Happy Valley Reservoir opened in 1896. In the 1890s Australia was affected by a severe economic depression, ending a hectic era of land booms and tumultuous expansionism. Financial institutions in Melbourne and banks in Sydney closed. The national fertility rate fell and immigration was reduced to a trickle. The value of South Australia's exports nearly halved. Drought and poor harvests from 1884 compounded the problems, with some families leaving for Western Australia. Adelaide was not as badly hit as the larger gold-rush cities of Sydney and Melbourne, and silver and lead discoveries at Broken Hill provided some relief. Only one year of deficit was recorded, but the price paid was retrenchments and lean public spending. Wine and copper were the only industries not to suffer a downturn. 20th century Adelaide was Australia's third largest city for most of the 20th century. Electric street lighting was introduced in 1900 and electric trams were transporting passengers in 1909. 28,000 men were sent to fight in World War I. Historian F. W. Crowley examined the reports of visitors in the early 20th century, noting that "many visitors to Adelaide admired the foresighted planning of its founders", as well as pondering the riches of the young city. Adelaide enjoyed a postwar boom, entering a time of relative prosperity. Its population grew, and it became the third most populous metropolitan area in the country, after Sydney and Melbourne. Its prosperity was short-lived, with the return of droughts and the Great Depression of the 1930s. It later returned to fortune under strong government leadership. Secondary industries helped reduce the state's dependence on primary industries. World War II brought industrial stimulus and diversification to Adelaide under the Playford Government, which advocated Adelaide as a safe place for manufacturing due to its less vulnerable location. Shipbuilding was expanded at the nearby port of Whyalla. The South Australian Government in this period built on former wartime manufacturing industries but neglected cultural facilities which meant South Australia's economy lagged behind. International manufacturers like General Motors Holden and Chrysler made use of these factories around the Adelaide area in suburbs like Elizabeth, completing its transformation from an agricultural service centre to a 20th-century motor city. The Mannum–Adelaide pipeline brought River Murray water to Adelaide in 1955 and an airport opened at West Beach in 1955. Flinders University and the Flinders Medical Centre were established in the 1960s at Bedford Park, south of the city. Today, Flinders Medical Centre is one of the largest teaching hospitals in South Australia. In the post-war years around the early 1960s, Adelaide was surpassed by Brisbane as Australia's third largest city. The Dunstan Governments of the 1970s saw something of an Adelaide 'cultural revival', establishing a wide array of social reforms. The city became noted for its progressivism as South Australia became the first Australian state or territory to decriminalise homosexuality between consenting adults in 1975. Adelaide became a centre for the arts, building upon the biennial "Adelaide Festival of Arts" that commenced in 1960. The State Bank collapsed in 1991 during an economic recession. The effects lasted until 2004, when Standard & Poor's reinstated South Australia's AAA credit rating. Adelaide's tallest building, completed in 2020, is called the Adelaidean and is located at 11 Frome Street. 21st century In the early years of the 21st century, a significant increase in the state government's spending on Adelaide's infrastructure occurred. The Rann government invested A$535 million in a major upgrade of the Adelaide Oval to enable Australian Football League to be played in the city centre and more than A$2 billion to build a new Royal Adelaide Hospital on land adjacent to the Adelaide Railway Station. The Glenelg tramline was extended through the city to Hindmarsh down to East Terrace and the suburban railway line extended south to Seaford. Following a period of stagnation in the 1990s and 2000s, Adelaide began several major developments and redevelopments. The Adelaide Convention Centre was redeveloped and expanded at a cost of A$350 million beginning in 2012. Three historic buildings were adapted for modern use: the Torrens Building in Victoria Square as the Adelaide campus for Carnegie Mellon University, University College London, and Torrens University; the Stock Exchange building as the Science Exchange of the Royal Institution Australia; and the Glenside Psychiatric Hospital as the Adelaide Studios of the SA Film Corporation. The government invested more than A$2 billion to build a desalination plant, powered by renewable energy, as an 'insurance policy' against droughts affecting Adelaide's water supply. The Adelaide Festival, Fringe, and Womadelaide became annual events. Geography Adelaide is north of the Fleurieu Peninsula, on the Adelaide Plains between the Gulf St Vincent and the low-lying Mount Lofty Ranges. The city stretches from the coast to the foothills, and from Gawler at its northern extent to Sellicks Beach in the south. According to the Regional Development Australia, an Australian government planning initiative, the "Adelaide Metropolitan Region" has a total land area of , while a more expansive definition by the Australian Bureau of Statistics defines a "Greater Adelaide" statistical area totalling . The city sits at an average elevation of above sea level. Mount Lofty, east of the Adelaide metropolitan region in the Adelaide Hills at an elevation of , is the tallest point of the city and in the state south of Burra. The city borders the Temperate Grassland of South Australia in the east, an endangered vegetation community. Much of Adelaide was bushland before British settlement, with some variation – sandhills, swamps and marshlands were prevalent around the coast. The loss of the sandhills to urban development had a particularly destructive effect on the coastline due to erosion. Where practical, the government has implemented programs to rebuild and vegetate sandhills at several of Adelaide's beachside suburbs. Tennyson Dunes is the largest contiguous, tertiary dune system contained entirely within Metropolitan Adelaide, providing refuge for a variety of remnant species formerly found along the entire coastline. Much of the original vegetation has been cleared with what is left to be found in reserves such as the Cleland National Park and Belair National Park. A number of creeks and rivers flow through the Adelaide region. The largest are the Torrens and Onkaparinga catchments. Adelaide relies on its many reservoirs for water supply with the Happy Valley Reservoir supplying around 40% and the much larger Mount Bold Reservoir 10% of Adelaide's domestic requirements respectively. Geology Adelaide and its surrounding area is one of the most seismically active regions in Australia. On 1 March 1954 at 3:40 am Adelaide experienced its largest recorded earthquake to date, with the epicentre 12 km from the city centre at Darlington, and a reported magnitude of 5.6. There have been smaller earthquakes in 2010, 2011, 2014, 2017, 2018 and 2022. The uplands of the Adelaide Hills, part of the southern Mount Lofty Ranges to the east of Adelaide, are defined on their western side by a number of arcuate faults (the Para, Eden, Clarendon and Willunga Faults), and consist of rocks such as siltstone, dolomite and quartzite, dating from the Neoproterozoic to the middle Cambrian, laid down in the Adelaide Rift Complex, the oldest part of the Adelaide Superbasin. Most of the Adelaide metropolitan area lies in the downthrown St Vincent Basin and its embayments, including the Adelaide Plains Sub-basin, and the Golden Grove, Noarlunga and Willunga Embayments. These basins contain deposits of Tertiary marine and non-marine sands and limestones, which form important aquifers. These deposits are overlain by Quaternary alluvial fans and piedmont slope deposits, derived from erosion of the uplands, consisting of sands, clays and gravels, interfingering to the west with transgressive Pleistocene to Holocene marine sands and coastal sediments of the shoreline of Gulf St Vincent. Urban layout Adelaide is a planned city, designed by the first Surveyor-General of South Australia, Colonel William Light. His plan, sometimes referred to as "Light's Vision" (also the name of a statue of him on Montefiore Hill), arranged Adelaide in a grid, with five squares in the Adelaide city centre and a ring of parks, known as the Adelaide Parklands, surrounding it. Light's selection of the location for the city was initially unpopular with the early settlers, as well as South Australia's first governor, John Hindmarsh, due to its distance from the harbour at Port Adelaide, and the lack of fresh water there. Light successfully persisted with his choice of location against this initial opposition. Recent evidence suggests that Light worked closely with George Kingston as well as a team of men to set out Adelaide, using various templates for city plans going back to Ancient Greece, including Italian Renaissance designs and the similar layouts of the American cities Philadelphia and Savannah–which, like Adelaide, follow the same layout of a central city square, four complementing city squares surrounding it and a parklands area that surrounds the city centre. The benefits of Light's design are numerous: Adelaide has had wide multi-lane roads from its beginning, an easily navigable cardinal direction grid layout and an expansive green ring around the city centre. There are two sets of ring roads in Adelaide that have resulted from the original design. The inner ring route (A21) borders the parklands, and the outer route (A3/A13/A16/A17) completely bypasses the inner city via (in clockwise order) Grand Junction Road, Hampstead Road, Ascot Avenue, Portrush Road, Cross Road and South Road. Suburban expansion has to some extent outgrown Light's original plan. Numerous former outlying villages and "country towns", as well as the satellite city of Elizabeth, have been enveloped by its suburban sprawl. Expanding developments in the Adelaide Hills region led to the construction of the South Eastern Freeway to cope with growth, which has subsequently led to new developments and further improvements to that transport corridor. Similarly, the booming development in Adelaide's South led to the construction of the Southern Expressway. New roads are not the only transport infrastructure developed to cope with the urban growth. The O-Bahn Busway is an example of a unique solution to Tea Tree Gully's transport woes in the 1980s. The development of the nearby suburb of Golden Grove in the late 1980s is an example of well-thought-out urban planning. In the 1960s, a Metropolitan Adelaide Transport Study Plan was proposed to cater for the future growth of the city. The plan involved the construction of freeways, expressways and the upgrade of certain aspects of the public transport system. The then premier Steele Hall approved many parts of the plan and the government went as far as purchasing land for the project. The later Labor government elected under Don Dunstan shelved the plan, but allowed the purchased land to remain vacant, should the future need for freeways arise. In 1980, the Liberal party won government and premier David Tonkin committed his government to selling off the land acquired for the MATS plan, ensuring that even when needs changed, the construction of most MATS-proposed freeways would be impractical. Some parts of this land have been used for transport, (e.g. the O-Bahn Busway and Southern Expressway), while most has been progressively subdivided for residential use. In 2008, the SA Government announced plans for a network of transport-oriented developments across the Adelaide metropolitan area and purchased a 10 hectare industrial site at Bowden for $52.5 million as the first of these developments. Housing Historically, Adelaide's suburban residential areas have been characterised by single-storey detached houses built on blocks. A relative lack of suitable, locally-available timber for construction purposes led to the early development of a brick-making industry, as well as the use of stone, for houses and other buildings. By 1891, 68% of houses were built of stone, 15% of timber, and 10% of brick, with brick also being widely used in stone houses for quoins, door and window surrounds, and chimneys and fireplaces. There is a wide variety in the styles of these houses. Until the 1960s, most of the more substantial houses were built of red brick, though many front walls were of ornamental stone. Then cream bricks became fashionable, and in the 1970s, deep red and brown bricks became popular. Until the 1970s, roofs tended to be clad with (painted) corrugated iron or cement or clay tiles, usually red "terracotta". Since then, Colorbond corrugated steel has dominated. Most roofs are pitched. Flat roofs are not common. Up to the 1970s, most houses were of "double brick" construction on concrete footings, with timber floors laid on joists supported by "dwarf walls". Later houses have mainly been of "brick veneer" construction – structural timber or, more recently, lightweight steel frame on a concrete slab foundation, lined with Gyprock, and with an outer skin of brickwork, to cope with Adelaide's reactive soils, particularly Keswick Clay, black earth and some red-brown earth soils. The use of precast concrete panels for floor and wall construction has also increased. In addition to this, a significant factor in Adelaide's suburban history is the role of the South Australian Housing Trust. Climate Adelaide has a hot-summer Mediterranean climate (Csa) under the Köppen climate classification. The city has hot, dry summers and cool winters with moderate rainfall. Most precipitation falls in the winter months, leading to the suggestion that the climate be classified as a "cold monsoon". Rainfall is unreliable, light and infrequent throughout summer, although heavy falls can occur. The winter has fairly reliable rainfall with June being the wettest month of the year, averaging around 80 mm. Frosts are occasional, with the most notable occurrences in 1908 and 1982. Hail is common in winter. Adelaide is a windy city with significant wind chill in winter, which makes the temperature seem colder than it actually is. Snowfall in the metropolitan area is extremely rare, although light and sporadic falls in the nearby hills and at Mount Lofty occur during winter. Dewpoints in the summer typically range from . There are usually several days in summer where the temperature reaches or above; the frequency of these temperatures has been increasing in recent years. Temperature extremes range from -0.4 °C (31.4 °F), 8 June 1982 to 47.7 °C (117.9 °F), 24 January 2019. The city features 90.6 clear days annually. The average sea temperature ranges from in August to in February. Liveability Adelaide was consistently ranked in the world's 10 most liveable cities through the 2010s by The Economist Intelligence Unit. In June 2021, The Economist ranked Adelaide the third most liveable city in the world, behind Auckland and Osaka. In June 2023, Adelaide was ranked the twelfth most liveable city in the world by the Economist Intelligence Unit. In December 2021, Adelaide was named the world's second National Park City, after the state government had lobbied for this title. It was ranked the most liveable city in Australia by the Property Council of Australia, based on surveys of residents' views of their own city, between 2010 and 2013, dropping to second place in 2014. Governance Adelaide, as the capital of South Australia, is the seat of the Government of South Australia. The bicameral Parliament of South Australia consists of the lower house known as the House of Assembly and the upper house known as the Legislative Council. General elections are held every four years, the last being the 2022 South Australian state election. As Adelaide is South Australia's capital and most populous city, the State Government co-operates extensively with the City of Adelaide. In 2006, the Ministry for the City of Adelaide was created to facilitate the State Government's collaboration with the Adelaide City Council and the Lord Mayor to improve Adelaide's image. The State Parliament's Capital City Committee is also involved in the governance of the City of Adelaide, being primarily concerned with the planning of Adelaide's urban development and growth. Reflecting South Australia's status as Australia's most centralised state, Adelaide elects a substantial majority of the South Australian House of Assembly. Of the 47 seats in the chamber, 34 seats (three-quarters of the legislature) are based in Adelaide, and two rural seats include Adelaide suburbs. Local governments The Adelaide metropolitan area is divided between nineteen local government areas. At its centre, the City of Adelaide administers the Adelaide city centre, North Adelaide, and the surrounding Adelaide Parklands. It is the oldest municipal authority in Australia and was established in 1840, when Adelaide and Australia's first mayor, James Hurtle Fisher, was elected. From 1919 onwards, the city has had a Lord Mayor, the current being Lord Mayor The Right Honourable Jane Lomax-Smith. Demography Adelaide's inhabitants are known as Adelaideans. Compared with Australia's other state capitals, Adelaide is growing at a rate similar to Sydney, Canberra, and Hobart (see List of cities in Australia by population). In 2020, it had a metropolitan population (including suburbs) of more than 1,376,601, making it Australia's fifth-largest city. Some 77% of the population of South Australia are residents of the Adelaide metropolitan area, making South Australia one of the most centralised states. Major areas of population growth in recent years have been in outer suburbs such as Mawson Lakes and Golden Grove. Adelaide's inhabitants occupy 366,912 houses, 57,695 semi-detached, row terrace or town houses and 49,413 flats, units or apartments. About one sixth (17.1%) of the population had university qualifications. The number of Adelaideans with vocational qualifications (such as tradespersons) fell from 62.1% of the labour force in the 1991 census to 52.4% in the 2001 census. Adelaide is ageing more rapidly than other Australian capital cities. More than a quarter (27.5%) of Adelaide's population is aged 55 years or older, in comparison to the national average of 25.6%. Adelaide has the lowest number of children (under-15-year-olds), who comprised 17.7% of the population, compared to the national average of 19.3%. Ancestry and immigration At the 2021 census, the most commonly nominated ancestries were: Overseas-born Adelaideans composed 31.3% of the total population at the 2021 census. The five largest groups of overseas-born were from England (5.7%), India (3.1%), Mainland China (1.8%), Vietnam (1.2%) and Italy (1.1%). Suburbs including Newton, Payneham and Campbelltown in the east and Torrensville, West Lakes and Fulham to the west, have large Greek and Italian communities. The Italian consulate is located in the western suburb of Hindmarsh. Large Vietnamese populations are settled in the north-western suburbs of Woodville, Kilkenny, Pennington, Mansfield Park and Athol Park and also Parafield Gardens and Pooraka in Adelaide's north. Migrants from India and Sri Lanka have settled into inner suburban areas of Adelaide including the inner northern suburbs of Blair Athol, Kilburn and Enfield and the inner southern suburbs of Plympton, Park Holme and Kurralta Park. Suburbs such as Para Hills, Salisbury, Ingle Farm and Blair Athol in the north and Findon, West Croydon and Seaton and other Western suburbs have sizeable Afghan communities. Chinese migrants favour settling in the eastern and north eastern suburbs including Kensington Gardens, Greenacres, Modbury and Golden Grove. Mawson Lakes has a large international student population, due to its proximity to the University of South Australia campus. At the 2021 census, 1.7% of Adelaide's population identified as being Indigenous — Aboriginal Australians and Torres Strait Islanders. Language At the 2016 census, 75.4% of the population spoke English at home. The other languages most commonly spoken at home were Italian (2.1%), Standard Mandarin (2.1%), Greek (1.7%) Vietnamese (1.4%), and Cantonese (0.7%). The Kaurna language, spoken by the area's original inhabitants, had no living speakers in the middle of the 20th century, but since the 1990s there has been a sustained revival effort from academics and Kaurna elders. Religion Adelaide was founded on a vision of religious tolerance that attracted a wide variety of religious practitioners. This led to it being known as The City of Churches. But approximately 28% of the population expressed no religious affiliation in the 2011 Census, compared with the national average of 22.3%, making Adelaide one of Australia's least religious cities. Over half of the population of Adelaide identifies as Christian, with the largest denominations being Catholic (21.3%), Anglican (12.6%), Uniting Church (7.6%) and Eastern Orthodox (3.5%). The Jewish community of the city dates back to 1840. Eight years later, 58 Jews lived in the city. A synagogue was built in 1871, when 435 Jews lived in the city. Many took part in the city councils, such as Judah Moss Solomon (1852–66). Three Jews have been elected to the position of city mayor. In 1968, the Jewish population of Adelaide numbered about 1,200; in 2001, according to the Australian census, 979 persons declared themselves to be Jewish by religion. In 2011, over 1,000 Jews were living in the city, operating an Orthodox and a Reform school, in addition to a virtual Jewish museum. The "Afghan" community in Australia first became established in the 1860s when camels and their Pathan, Punjabi, Baluchi and Sindhi handlers began to be used to open up settlement in the continent's arid interior. Until eventually superseded by the advent of the railways and motor vehicles, camels played an invaluable economic and social role in transporting heavy loads of goods to and from isolated settlements and mines. This is acknowledged by the name of The Ghan, the passenger train operating between Adelaide, Alice Springs, and Darwin. The Central Adelaide Mosque is regarded as Australia's oldest permanent mosque; an earlier mosque at Marree in northern South Australia, dating from 1861 to 1862 and subsequently abandoned or demolished, has now been rebuilt. Economy South Australia's largest employment sectors are health care and social assistance, surpassing manufacturing in SA as the largest employer since 2006–07. In 2009–10, manufacturing in SA had average annual employment of 83,700 persons compared with 103,300 for health care and social assistance. Health care and social assistance represented nearly 13% of the state average annual employment. The Adelaide Hills wine region is an iconic and viable economic region for both the state and country in terms of wine production and sale. The 2014 vintage is reported as consisting of red grapes crushed valued at A$8,196,142 and white grapes crushed valued at $14,777,631. The retail trade is the second largest employer in SA (2009–10), with 91,900 jobs, and 12 per cent of the state workforce. Manufacturing, defence technology, high-tech electronic systems and research, commodity export and corresponding service industries all play a role in the SA economy. Almost half of all cars produced in Australia were made in Adelaide at the General Motors Holden plant in Elizabeth. The site ceased operating in November 2017. The collapse of the State Bank in 1992 resulted in large levels of state public debt (as much as A$4 billion). The collapse meant that successive governments enacted lean budgets, cutting spending, which was a setback to the further economic development of the city and state. The debt has more recently been reduced with the State Government once again receiving a AAA+ Credit Rating. The global media conglomerate News Corporation was founded in, and until 2004 incorporated in, Adelaide and it is still considered its "spiritual" home by its founder, Rupert Murdoch. Australia's largest oil company, Santos, prominent South Australian brewery, Coopers, and national retailer Harris Scarfe also call Adelaide their home. In 2018, at which time more than 80 organisations employed 800 people in the space sector in South Australia, Adelaide was chosen for the headquarters of a new Australian Space Agency. The agency opened its in 2020. It is working to triple the size of the Australian space industry and create 20,000 new jobs by 2030. Defence industry Adelaide is home to a large proportion of Australia's defence industries, which contribute over A$1 billion to South Australia's Gross State Product. The principal government military research institution, the Defence Science and Technology Organisation, and other defence technology organisations such as BAE Systems Australia and Lockheed Martin Australia, are north of Salisbury and west of Elizabeth in an area now called "Edinburgh Parks", adjacent to RAAF Base Edinburgh. Others, such as Saab Systems and Raytheon, are in or near Technology Park. ASC Pty Ltd, is based in the industrial suburb of Osborne and is also a part of Technology Park. South Australia was charged with constructing Australia's s and more recently the A$6 billion contract to construct the Royal Australian Navy's new air-warfare destroyers. Employment statistics , Greater Adelaide had an unemployment rate of 7.4% with a youth unemployment rate of 15%. The median weekly individual income for people aged 15 years and over was $447 per week in 2006, compared with $466 nationally. The median family income was $1,137 per week, compared with $1,171 nationally. Adelaide's housing and living costs are substantially lower than that of other Australian cities, with housing being notably cheaper. The median Adelaide house price is half that of Sydney and two-thirds that of Melbourne. The three-month trend unemployment rate to March 2007 was 6.2%. The Northern suburbs' unemployment rate is disproportionately higher than the other regions of Adelaide at 8.3%, while the East and South are lower than the Adelaide average at 4.9% and 5.0% respectively. House prices Over the decade March 2001 – March 2010, Metropolitan Adelaide median house prices approximately tripled. (approx. 285% – approx. 11%p.a. compounding) In the five years March 2007 – March 2012, prices increased by approx. 27% – approx. 5%p.a. compounding. March 2012 – March 2017 saw a further increase of 19% – approx. 3.5%p.a. compounding. In summary: Each quarter, The Alternative and Direct Investment Securities Association (ADISA) publishes a list of median house sale prices by suburb and Local Government Area. (Previously, this was done by REISA) Due to the small sizes of many of Adelaide's suburbs, the low volumes of sales in these suburbs, and (over time) the huge variations in the numbers of sales in a suburb in a quarter, statistical analysis of "the most expensive suburb" is unreliable; the suburbs appearing in the "top 10 most expensive suburbs this quarter" list is constantly varying. Quarterly Reports for the last two years can be found on the REISA website. Education and research Education forms an increasingly important part of the city's economy, with the South Australian Government and educational institutions attempting to position Adelaide as "Australia's education hub" and marketing it as a "Learning City." The number of international students studying in Adelaide has increased rapidly in recent years to 30,726 in 2015, of which 1,824 were secondary school students. In addition to the city's existing institutions, foreign institutions have been attracted to set up campuses to increase its attractiveness as an education hub. Adelaide is the birthplace of three Nobel laureates, more than any other Australian city: physicist William Lawrence Bragg and pathologists Howard Florey and Robin Warren, all of whom completed secondary and tertiary education at St Peter's College and the University of Adelaide. Primary and secondary education There are two systems of primary and secondary schools, a public system operated by the South Australian Government's Department for Education, and a private system of independent and Catholic schools. South Australian schools provide education under the Australian Curriculum for reception to Year 10 students. In Years 10 to 12, students study for the South Australian Certificate of Education (SACE). They have the option of incorporating vocational education and training (VET) courses or a flexible learning option (FLO). South Australia also has 24 schools that use International Baccalaureate programs as an alternative to the Australian Curriculum or SACE. These programs include the IB Primary Years Programme, the IB Middle Years Programme, and the IB Diploma Programme. For South Australian students who cannot attend a traditional school, including students who live in rural or remote areas, the state government runs the Open Access College (OAC), which provides virtual teaching. The OAC has a campus in Marden which caters to students from reception to Year 12 and adults who haven't been able to complete their SACE. Guardians are also able to apply for their child to be educated from home as long as they provide an education program which meets the same requirements as the Australian Curriculum as well as opportunities for social interaction. Tertiary education There are three public universities local to Adelaide, as well as one private university and three constituent colleges of foreign universities. Flinders University of South Australia, the University of Adelaide, the University of South Australia and Torrens University Australia—part of the Laureate International Universities are based in Adelaide. The University of Adelaide was ranked in the top 150 universities worldwide. Flinders ranked in the top 250 and Uni SA in the top 300. Torrens University Australia is part of an international network of over 70 higher education institutions in more than 30 countries worldwide. The historic Torrens Building in Victoria Square houses Carnegie Mellon University's Heinz College Australia, and University College London's School of Energy and Resources (Australia), and constitute the city's international university precinct. The University of Adelaide, with 25,000 students, is Australia's third-oldest university and a member of the leading "Group of Eight". It has five campuses throughout the state, including two in the city-centre, and a campus in Singapore. The University of South Australia, with 37,000 students, has two North Terrace campuses, three other campuses in the metropolitan area and campuses in the regional cities of Whyalla and Mount Gambier. The University of Adelaide and the University of South Australia have had multiple proposals to merge into a single university. A proposal in 2018 failed due to uncertainty as to the new name and leadership of the merged university. In 2022, the universities announced a new merger proposal, with the name and leadership issues settled and support from the South Australian government. Flinders University, with 25,184 students, is based in the southern suburb of Bedford Park, alongside the Flinders Medical Centre, with additional campuses in neighbouring Tonsley and in Victoria Square in the city centre. The Adelaide College of Divinity is at Brooklyn Park. There are several South Australian TAFE (Technical and Further Education) campuses in the metropolitan area that provide a range of vocational education and training. The Adelaide College of the Arts, as a school of TAFE SA, provides nationally recognised training in visual and performing arts. Research In addition to the universities, Adelaide is home to research institutes, including the Royal Institution of Australia, established in 2009 as a counterpart to the two-hundred-year-old Royal Institution of Great Britain. Many of the organisations involved in research tend to be geographically clustered throughout the Adelaide metropolitan area: The east end of North Terrace: SA Pathology; Hanson Institute; National Wine Centre. The west end of North Terrace: South Australian Health and Medical Research Institute (SAHMRI), located next to the Royal Adelaide Hospital. The Waite Research Precinct: SARDI Head Office and Plant Research Centre; AWRI; ACPFG; CSIRO research laboratories. SARDI also has establishments at Glenside and West Beach. Edinburgh, South Australia: DSTO; BAE Systems (Australia); Lockheed Martin Australia Electronic Systems. Technology Park (Mawson Lakes): BAE Systems; Optus; Raytheon; Topcon; Lockheed Martin Australia Electronic Systems. Research Park at Thebarton: businesses involved in materials engineering, biotechnology, environmental services, information technology, industrial design, laser/optics technology, health products, engineering services, radar systems, telecommunications and petroleum services. Science Park (adjacent to Flinders University): Playford Capital. The Basil Hetzel Institute for Translational Health Research in Woodville the research arm of the Queen Elizabeth Hospital, Adelaide The Joanna Briggs Institute, a global research collaboration for evidence-based healthcare with its headquarters in North Adelaide. Cultural life While established as a British province, and very much English in terms of its culture, Adelaide attracted immigrants from other parts of Europe early on, including German and other European non-conformists escaping religious persecution. The first German Lutherans arrived in 1838, bringing with them the vine cuttings that they used to found the acclaimed wineries of the Barossa Valley. The Royal Adelaide Show is an annual agricultural show and state fair, established in 1839 and now a huge event held in the Adelaide Showground annually. Adelaide's arts scene flourished in the 1960s and 1970s with the support of successive premiers from both major political parties. The renowned Adelaide Festival of Arts was established in 1960 under Thomas Playford, which in the same year spawned an unofficial uncurated series of performances and exhibits which grew into the Adelaide Fringe. Construction of the Adelaide Festival Centre began under Steele Hall in 1970 and was completed under the subsequent government of Don Dunstan, who also established the South Australian Film Corporation in 1972 and the State Opera of South Australia in 1976. Over time, the Adelaide Festival expanded to include Adelaide Writers' Week and WOMADelaide, and other separate festivals were established, such as the Adelaide Cabaret Festival (2002), the Adelaide Festival of Ideas (1999), the Adelaide Film Festival (2013), FEAST (1999, a queer culture), Tasting Australia (1997, a food and wine affair), and Illuminate Adelaide (2021). With the Festival, the Fringe, WOMADelaide, Writers' Week and the Adelaide 500 street motor racing event (along with evening music concerts) all happening in early March, the period became known colloquially as "Mad March". In 2014, Ghil'ad Zuckermann founded the Adelaide Language Festival. There are many international cultural fairs, most notably the German Schützenfest and Greek Glendi. Adelaide holds an annual Christmas pageant, the world's largest Christmas parade. North Terrace institutions As the state capital, Adelaide has a great number of cultural institutions, many of them along the boulevard of North Terrace. The Art Gallery of South Australia, with about 35,000 works, holds Australia's second largest state-based collection. Adjacent are the South Australian Museum and State Library of South Australia. The Adelaide Botanic Garden, National Wine Centre and Tandanya National Aboriginal Cultural Institute are nearby in the East End of the city. In the back of the State Library lies the Migration Museum, Australia's oldest museum of its kind. Further west, the Lion Arts Centre is home to ACE Open, which showcases contemporary art; Dance Hub SA; and other studios and arts industry spaces. The Mercury Cinema and the JamFactory ceramics and design gallery are just around the corner. Performing arts and music venues The Adelaide Festival Centre (which includes the Dunstan Playhouse, Festival Theatre and Space Theatre), on the banks of the Torrens, is the focal point for much of the cultural activity in the city and home to the State Theatre Company of South Australia. Other live music and theatre venues include the Adelaide Entertainment Centre; Adelaide Oval; Memorial Drive Park; Thebarton Theatre; Adelaide Town Hall; Her Majesty's Theatre; Queen's Theatre; Holden Theatres; and the Hopgood Theatre. The Lion Arts Factory, within the Lion Arts Centre, hosts contemporary music in a wide range of genres, as does "The Gov" in Hindmarsh. The city also has numerous smaller theatres, pubs and cabaret bars which host performances. Live music In 2015, it was said that there were now more live music venues per capita in Adelaide than any other capital city in the southern hemisphere, Lonely Planet labelled Adelaide "Australia's live music city", and the city was recognised as a "City of Music" by the UNESCO Creative Cities Network. In addition to its own WOMAD (WOMADelaide), Adelaide attracts several touring music festivals, including Creamfields, Laneway and Groovin'. Adelaide has produced musical groups and individuals who have achieved national and international fame. These include the Adelaide Symphony Orchestra, the Adelaide Youth Orchestra, rock bands The Angels, Atlas Genius, Cold Chisel, The Superjesus, Wolf & Cub, roots/blues group The Audreys, internationally acclaimed metal acts I Killed The Prom Queen and Double Dragon, popular Australian hip-hop outfit Hilltop Hoods, pop acts like Sia, Orianthi, Guy Sebastian, and Wes Carr, as well as internationally successful tribute act, The Australian Pink Floyd Show. Noted rocker Jimmy Barnes (formerly lead vocalist with Cold Chisel) spent most of his youth in the northern suburb of Elizabeth. Paul Kelly grew up in Adelaide and was head prefect at Rostrevor College. The first Australian Idol winner, Guy Sebastian, hails from the north-eastern suburb of Golden Grove. Television Adelaide is served by numerous digital free-to-air television channels: ABC ABC HD (ABC broadcast in HD) ABC TV Plus ABC Me ABC News SBS SBS HD (SBS broadcast in HD) SBS World Movies HD SBS Viceland HD SBS Food NITV SBS WorldWatch Seven 7HD (Seven broadcast in HD) 7Two 7mate 7Bravo 7flix Racing.com Nine 9HD (Nine broadcast in HD) 9Gem 9Go! 9Life 9Gem HD 9Rush Extra 10 10 HD (10 broadcast in HD) 10 Bold 10 Peach 10 Shake TVSN Gecko TV C44 Adelaide (Adelaide's community TV station) All of the five Australian national television networks broadcast both high-definition digital and standard-definition digital television services in Adelaide. They share three transmission towers on the ridge near the summit of Mount Lofty. There are two other transmission sites at 25 Grenfell Street, Adelaide and Elizabeth Downs. The two government-funded stations are run by the Australian Broadcasting Corporation (ABC South Australia) and the Special Broadcasting Service (SBS). The Seven Network and Network Ten both own their Adelaide stations (SAS-7 and ADS-10 respectively). Adelaide's NWS-9 is part of the Nine Network. Adelaide also has a community television station, Channel 44. As part of a nationwide phase-out of analogue television in Australia, Adelaide's analogue television service was shut down on 2 April 2013. The Foxtel pay TV service is also available via cable or satellite to the entire metropolitan area. All the major broadcasting networks also operate online on-demand television services, alongside internet-only services such as Stan, Fetch TV, Netflix, YouTube, Disney+, and Kayo Sports. Radio There are 20 radio stations that serve the metropolitan area, as well as four stations that serve only parts of the metropolitan area; six commercial stations, six community stations, six national stations and two narrowcast stations. DAB+ digital radio has been broadcasting in metropolitan Adelaide since 20 May 2009, and currently offers a choice of 41 stations all operated by the existing licensed radio broadcasters, which includes high-quality simulcast of all AM and FM stations. Sport The main sports played professionally in Adelaide are Australian Rules football, soccer, cricket, netball, and basketball. Adelaide is the home of two Australian Football League teams: the Adelaide Football Club and Port Adelaide Football Club, and one A-League soccer team, Adelaide United. A local Australian rules football league, the South Australian National Football League (SANFL), is made up of 10 teams from around Adelaide. The SANFL has been in operation since 1877 when it began as the South Australian Football Association (SAFA) before changing its name to the SANFL in 1927. The SANFL is the oldest surviving football league of any code played in Australia. Adelaide has developed a strong culture of attracting crowds to major sporting events. Until the completion of the 2012–14 renovation and upgrade of the Adelaide Oval, most large sporting events took place at either Football Park (the then home base of the Adelaide Crows, and the then Port Adelaide home game venue), or the historic Adelaide Oval, home of the South Australia Redbacks and the Adelaide Strikers cricket teams. Since completion of the upgrade, home games for Adelaide Crows and Port Adelaide now take place at Adelaide Oval. Since 1884, Adelaide Oval has also hosted an international cricket test every summer, along with a number of One Day International cricket matches. Memorial Drive Park, adjacent to the Adelaide Oval, used to host Davis Cup and other major tennis events, including the Australian Open and the Adelaide International. Adelaide's professional association football team, Adelaide United, play in the A-League. Founded in 2003, their home ground is Hindmarsh Stadium, which has a capacity of 17,000 and is one of the few purpose-built soccer stadia in Australia. Prior to United's foundation, Adelaide City and West Adelaide represented the city in the National Soccer League. The two sides, which contest the Adelaide derby against one another, now play in the National Premier Leagues South Australia. For two years, 1997 and 1998, Adelaide was represented in Australia's top level rugby league, after the New South Wales Rugby League had played a single game per season at the Adelaide Oval for five years starting in 1991. The Adelaide Rams were formed and played in the breakaway Super League (SL) competition in 1997 before moving to the new National Rugby League in 1998. Initially playing at the Adelaide Oval, the club moved to the more suitable Hindmarsh Stadium late in the 1998 season. As part of a peace deal with the Australian Rugby League to end the Super League war, the club's owners News Limited (who were also owners of the SL) suddenly closed the club only weeks before the start of the 1999 season. Adelaide has two professional basketball teams, the men's team being the Adelaide 36ers which plays in the National Basketball League (NBL) and the women's team, the Adelaide Lightning which plays in the Women's National Basketball League (WNBL). Both teams play their home games at the Titanium Security Arena. Adelaide has a professional netball team, the Adelaide Thunderbirds, which plays in the national netball competition, the Suncorp Super Netball championship, with home games played at Netball SA Stadium. The Thunderbirds occasionally play games or finals at the Titanium Security Arena, while international netball matches are usually played at the 10,500 seat Adelaide Entertainment Centre. The Titanium Security Arena has a capacity of 8,000 and is the largest purpose-built basketball stadium in Australia. Since 1999 Adelaide and its surrounding areas have hosted the Tour Down Under bicycle race, organised and directed by Adelaide-based Michael Turtur. Turtur won an Olympic gold medal for Australia in the 4000 m team pursuit at the 1984 Los Angeles Olympics. The Tour Down Under is the largest cycling event outside Europe and was the first event outside Europe to be granted UCI ProTour status. Adelaide maintains a franchise in the Australian Baseball League, the Adelaide Giants. They have been playing since 2009, and their home stadium (until 2016) was Norwood Oval. From 2016 the team moved to the Diamond Sports Stadium located near the Adelaide International Airport due to renovations at Norwood. Adelaide also has an ice hockey team, Adelaide Adrenaline in the Australian Ice Hockey League (AIHL). It was national champions in 2009 and plays its games at the IceArenA. The Australian Grand Prix for World Championship Formula One racing was hosted by Adelaide from 1985 to 1995 on the Adelaide Street Circuit which was laid out in the city's East End as well as the eastern parklands including the Victoria Park Racecourse. The Grand Prix became a source of pride, and losing the event to Melbourne in a surprise announcement in mid-1993 left a void that has since been filled with the Adelaide 500 for V8 Supercar racing, held on a modified version of the same street circuit. The Classic Adelaide, a rally of classic sporting vehicles, is also held in the city and its surrounds. Adelaide formerly had three horse racing venues. Victoria Park, Cheltenham Park Racecourse, both of which have now closed, and Morphettville Racecourse that remains the home of the South Australian Jockey Club. It also has Globe Derby Park for Harness racing that opened in 1969, and by 1973 had become Adelaide's premier harness racing venue taking over from the Wayville Showgrounds, as well as Greyhound Park for greyhound racing that opened in 1972. The World Solar Challenge race attracts teams from around the world, most of which are fielded by universities or corporations, although some are fielded by high schools. The race has a 20-years' history spanning nine races, with the inaugural event taking place in 1987. Adelaide hosted the 2012 World Bowls Championships at Lockleys Bowling Club, becoming the third city in the world to have held the championships twice, having previously hosted the event in 1996. Dirt track speedway is also popular in Adelaide with three operating speedways. Adelaide Motorsport Park, located adjacent to the Adelaide International Raceway road racing circuit at Virginia ( north of the city centre) has been in continuous operation since 1979 after the closure of the popular Rowley Park Speedway. Gillman Speedway located in the semi-industrial suburb of Gillman, has been in operation since 1998 and caters to Motorcycle speedway and Sidecars, while the Sidewinders Speedway located in Wingfield is also a motorcycle speedway dedicated to Under-16 riders and has been in operation since 1978. In 2016, backed by South Australia's Peregrine Corporation opened up a multi-purpose facility; a state-of-the-art motorsporting park and a hotel alongside its newer OTR service station outside a small township of Tailem Bend currently named The Bend Motorsport Park. Design for thrill seekers and rev-heads the facility currently host South Australia's second Supercars motoring event during a round in August. Adelaide is home to the Great Southern Slam, the world's largest roller derby tournament. The tournament has been held biennially over Australia's Queen's Birthday holiday weekend since 2010. In 2014, and 2016 the tournament featured 45 teams playing in two divisions. In 2018, the tournament has expanded to 48 teams competing in three divisions. Infrastructure Transport Being centrally located on the Australian mainland, Adelaide forms a strategic transport hub for east–west and north–south routes. The city itself has a metropolitan public transport system managed by and known as the Adelaide Metro. The Adelaide Metro consists of a contracted bus system including the O-Bahn Busway, 6 commuter rail lines (diesel and electric), and a small tram network operating between inner suburb Hindmarsh, the city centre, and seaside Glenelg. Tramways were largely dismantled in the 1950s, but saw a revival in the 2010s with upgrades and extensions. Road transport in Adelaide has historically been easier than many of the other Australian cities, with a well-defined city layout and wide multiple-lane roads from the beginning of its development. Adelaide was known as a "twenty-minute city", with commuters having been able to travel from metropolitan outskirts to the city proper in roughly twenty minutes. However, such arterial roads often experience traffic congestion as the city grows. The Adelaide metropolitan area has one freeway and four expressways. In order of construction, they are: The South Eastern Freeway (M1), connects the south-east corner of the Adelaide Plain to the Adelaide Hills and beyond to Murray Bridge and Tailem Bend, where it then continues as National Highway 1 south-east to Melbourne. The Southern Expressway (M2), connecting the outer southern suburbs with the inner southern suburbs and the city centre. It duplicates the route of South Road. The North-South Motorway (M2), is an ongoing major project that will become the major north–south corridor, replacing most of what is now South Road, connecting the Southern Expressway and the Northern Expressway via a motorway with no traffic lights. As of 2020 the motorway's northern half is complete (save for a small link under construction at Croydon Park), connecting the Northern Expressway to Adelaide's inner north-west; the section running through Adelaide's inner west and inner south-west is awaiting funding. The Port River Expressway (A9), connects Port Adelaide and Outer Harbor to Port Wakefield Road at the northern "entrance" to the metropolitan area. The Northern Expressway (Max Fatchen Expressway) (M2), is the northern suburbs bypass route connecting the Sturt Highway (National Highway 20) via the Gawler Bypass to Port Wakefield Road at a point a few kilometres north of the Port River Expressway connection. The Northern Connector, completed in 2020, links the North South Motorway to the Northern Expressway. Airports The Adelaide metropolitan area has two commercial airports, Adelaide Airport and Parafield Airport. Adelaide Airport, in Adelaide's south-western suburbs, serves in excess of 8 million passengers annually. Parafield Airport, Adelaide's second airport north of the city centre, is used for small aircraft, pilot training and recreational aviation purposes. Parafield Airport served as Adelaide's main aerodrome until the opening of the Adelaide Airport in February 1955. Adelaide Airport serves many international and domestic destinations including all Australian state capitals. Adelaide is also home to a military airport, known as Edinburgh Airport, located in the northern suburbs. It was built in 1955 in a joint initiative with the United Kingdom for weapon development. Health Adelaide's two largest hospitals are the Royal Adelaide Hospital (RAH) in Adelaide Parklands, a teaching hospital affiliated with the University of Adelaide (800 beds), and the Flinders Medical Centre (580 beds) at Bedford Park, affiliated with Flinders University. The RAH also operates additional campuses for specialist care throughout the suburbs including the Hampstead Rehabilitation Centre (150 beds) at Northfield and the Glenside Campus (129 beds) for acute mental health services. Other major public hospitals are the Women's and Children's Hospital (305 beds), at North Adelaide; the Queen Elizabeth Hospital (340 beds) at Woodville; Modbury Hospital (178 beds) at Modbury; and the Lyell McEwin Hospital (198 beds) at Elizabeth Vale. Numerous private hospitals are also located throughout the city, with the largest operators being not-for-profits Adelaide Community Healthcare Alliance (3 hospitals) and Calvary Care (4 hospitals). In 2017, the RAH was relocated from the city's East End to a new AU$2.3 billion facility built over former railyards in the West End. The state-of-the-art hospital forms part of a new biomedical precinct called BioMed City that collocates the South Australian Health and Medical Research Institute (SAHMRI), the University of Adelaide Health and Medical Sciences building, the University of South Australia's Health Innovation Building, and the state's Dental Hospital. SAHMRI is building a $300 million second facility due to be completed by 2022 to house the Australian Bragg Centre with Australia's first proton therapy unit. There are also plans for the Women's and Children's Hospital to be relocated to the precinct adjacent the RAH by 2024. The largest provider of community health care within Adelaide is the not-for-profit Royal District Nursing Service (RDNS), which provides out of hospital care and hospital avoidance care. Energy Adelaide's energy requirements were originally met by the Adelaide Electric Supply Company, which was nationalised by the Playford government in 1946, becoming the Electricity Trust of South Australia (ETSA). Despite significant public opposition and the Labor party's anti-privatisation stance which left the Liberal party one vote short of the numbers needed to pass the legislation, ETSA was privatised by the Olsen Government in 1999 by way of a 200-year lease for the distribution network (ETSA Utilities, later renamed SA Power Networks) and the outright purchase of ETSA Power by the Cheung Kong Holdings for $3.5 billion (11 times ETSA's annual earnings) after Labor MP Trevor Crothers resigned from the party and voted with the government. The electricity retail market was opened to competition in 2003 and although competition was expected to result in lower retail costs, prices increased by 23.7% in the market's first year. In 2004, the privatisation was deemed to be a failure with consumers paying 60% more for their power and with the state government estimated to lose $3 billion in power generation net income in the first ten years of privatisation. In 2012, the industry came under scrutiny for allegedly reducing supply by shutting down generators during periods of peak demand to force prices up. Increased media attention also revealed that in 2009 the state government had approved a 46% increase in retail prices to cover expected increases in the costs of generation while generation costs had in fact fallen 35% by 2012. South Australia has the highest retail price for electricity in the country. Privatisation led to competition from a variety of companies who now separately provide for the generation, transmission, distribution and retail sales of gas and electricity. Electricity generation comes from a range of technologies and operators. ElectraNet operates the high-voltage electricity transmission network. SA Power Networks distributes electricity to end users. The largest electricity and gas retailing companies are also the largest generating companies. The largest fossil fuel power stations are the Torrens Island Power Station gas-fired plant operated by AGL Energy and the Pelican Point Power Station operated by Engie. South Australia also has wind and solar power and connections to the national grid. Gas is supplied from the Moomba Gas Processing Plant in the Cooper Basin via the Moomba Adelaide Pipeline System and the SEAGas pipeline from Victoria. In 2011, South Australia generated 18% of its electricity from wind power, and had 51% of the installed capacity of wind generators in Australia. Due to almost universal blackouts within the city during September 2016, the state worked with Tesla to produce the world's largest electricity battery at Hornsdale Power Reserve which has increased that state's electrical security to the extent in which large blackouts are no longer an event. Water The provision of water services is by the government-owned SA Water. Adelaide's water is supplied from its seven reservoirs: Mount Bold, Happy Valley, Myponga, Millbrook, Hope Valley, Little Para and South Para. The yield from these reservoir catchments can be as little as 10% of the city's requirements (90GL per annum) in drought years and about 60% in average years. The remaining demand is met by the pumping of water from the River Murray. A sea-water desalination plant capable of supplying 100GL per annum was built during the 2001–2009 drought; however, it operated at about 8% of its capacity until 2019. In December 2018, the State and Federal Governments agreed to fund a $2m study to determine how the plant could be used to reduce reliance on river water, in an effort to help save the Murray River basin and mouth (including the Coorong) from further ecological damage. Communications AdelaideFree WiFi is a citywide free Wi-Fi network covering most of the inner city areas of Adelaide, primarily the Adelaide CBD and Northern Adelaide precincts. It was officially launched at the Adelaide Central Markets on Tuesday 25 June 2014. It is provided by Internode, with infrastructure provided by outdoor Cisco WiFi N access points attached to the top of lighting poles, as well as inside cafes and businesses across the city. See also Adelaide Hills City of Adelaide Music of Adelaide Port Adelaide Lists Images of Adelaide List of Adelaide obsolete suburb names List of Adelaide parks and gardens List of Adelaide railway stations List of Adelaide suburbs List of films shot in Adelaide List of people from Adelaide List of protected areas in Adelaide List of public art in South Australia List of public transport routes in Adelaide List of South Australian commercial icons List of sporting clubs in Adelaide List of tallest buildings in Adelaide Sister cities of the City of Adelaide (the Local government area that governs the city centre) Tourist attractions in South Australia Notes References Further reading (full text) External links Adelaide City Council > Official City Guide Adelaide City Council Kids in Adelaide Retrieved 12 May 2020. 1836 establishments in Australia Australian capital cities Cities in South Australia Coastal cities in Australia Planned capitals Populated places established in 1836 Metropolitan areas of Australia

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https://en.wikipedia.org/wiki/Alan%20Garner

Alan Garner

Alan Garner (born 17 October 1934) is an English novelist best known for his children's fantasy novels and his retellings of traditional British folk tales. Much of his work is rooted in the landscape, history and folklore of his native county of Cheshire, North West England, being set in the region and making use of the native Cheshire dialect. Born in Congleton, Garner grew up around the nearby town of Alderley Edge, and spent much of his youth in the wooded area known locally as "The Edge", where he gained an early interest in the folklore of the region. Studying at Manchester Grammar School and then briefly at Oxford University, in 1957 he moved to the village of Blackden, where he bought and renovated an Early Modern Period (circa 1590) building known as Toad Hall. His first novel, The Weirdstone of Brisingamen, was published in 1960. A children's fantasy novel set on the Edge, it incorporated elements of local folklore in its plot and characters. Garner wrote a sequel, The Moon of Gomrath (1963), and a third book, Boneland (2012). He wrote several fantasy novels, including Elidor (1965), The Owl Service (1967) and Red Shift (1973). Turning away from fantasy as a genre, Garner produced The Stone Book Quartet (1979), a series of four short novellas detailing a day in the life of four generations of his family. He also published a series of British folk tales which he had rewritten in a series of books entitled Alan Garner's Fairy Tales of Gold (1979), Alan Garner's Book of British Fairy Tales (1984) and A Bag of Moonshine (1986). In his subsequent novels, Strandloper (1996) and Thursbitch (2003), he continued writing tales revolving around Cheshire, although without the fantasy elements which had characterised his earlier work. Biography Early life: 1934–56 Garner was born in the front room of his grandmother's house in Congleton, Cheshire, on 17 October 1934. He was raised in nearby Alderley Edge, a well-to-do village that had effectively become a suburb of Manchester. His "rural working-class family", had been connected to Alderley Edge since at least the sixteenth century and could be traced back to the death of William Garner in 1592. Garner has stated that his family had passed on "a genuine oral tradition" involving folk tales about The Edge, which included a description of a king and his army of knights who slept under it, guarded by a wizard. In the mid-nineteenth century Alan's great-great-grandfather Robert had carved the face of a bearded wizard onto the face of a cliff next to a well, known locally at that time as the Wizard's Well. Robert Garner and his other relatives had all been craftsmen, and, according to Garner, each successive generation had tried to "improve on, or do something different from, the previous generation". Garner's grandfather, Joseph Garner, "could read, but didn't and so was virtually unlettered". Instead, he taught his grandson the folk tales he knew about The Edge. Garner later remarked that as a result, he was "aware of [the Edge's] magic" as a child, and he and his friends often played there. The story of the king and the wizard living under the hill played an important part in his life, becoming, he explained, "deeply embedded in my psyche" and heavily influencing his later novels. Garner faced several life-threatening childhood illnesses, which left him bed ridden for much of the time. He attended a local village school, where he found that, despite being praised for his intelligence, he was punished for speaking in his native Cheshire dialect; for instance, when he was six his primary school teacher washed his mouth out with soapy water. Garner then won a place at Manchester Grammar School, where he received his secondary education; entry was means-tested, resulting in his school fees being waived. Rather than focusing his interest on creative writing, it was here that he excelled at sprinting. He used to go jogging along the highway, and later claimed that in doing so he was sometimes accompanied by the mathematician Alan Turing, who shared his fascination for the Disney film Snow White and the Seven Dwarfs. Garner was then conscripted into national service, serving for a time with the Royal Artillery while posted to Woolwich in Southeast London. At school, Garner had developed a keen interest in the work of Aeschylus and Homer, as well as the Ancient Greek language. Thus, he decided to pursue the study of Classics at Magdalen College, Oxford, passing his entrance exams in January 1953; at the time he had thoughts of becoming a professional academic. He was the first member of his family to receive anything more than a basic education, and he noted that this removed him from his "cultural background" and led to something of a schism with other members of his family, who "could not cope with me, and I could not cope with" them. Looking back, he remarked, "I soon learned that it was not a good idea to come home excited over irregular verbs". In 1955, he joined the university theatrical society, playing the role of Mark Antony in a performance of William Shakespeare's Antony and Cleopatra where he co-starred alongside Dudley Moore and where Kenneth Baker was the stage manager. In August 1956, he decided that he wished to devote himself to novel writing, and decided to abandon his university education without taking a degree; he left Oxford in late 1956. He nevertheless felt that the academic rigour which he learned during his university studies has remained "a permanent strength through all my life". The Weirdstone of Brisingamen and The Moon of Gomrath: 1957–64 Aged 22, Garner was out cycling when he came across a hand-painted sign announcing that an agricultural cottage in Toad Hall – a late medieval building situated in Blackden, seven miles from Alderley Edge – was on sale for £510. Although he personally could not afford it, he was lent the money by the local Oddfellow lodge, enabling him to purchase and move into the cottage in June 1957. In the late nineteenth century the Hall had been divided into two agricultural labourers' cottages, but Garner was able to purchase the second for £150 about a year later; he proceeded to knock down the dividing walls and convert both halves back into a single home. Garner had begun writing his first novel, The Weirdstone of Brisingamen: A Tale of Alderley, in September 1956. However it was while at Toad Hall that he finished the book. Set in Alderley Edge, it revolves around two children, Susan and Colin, who are sent to live in the area with their mother's old nursemaid, Bess, and her husband, Gowther Mossock. While exploring the Edge, they encounter a race of malevolent creatures, the svart alfar, who dwell in the Edge's abandoned mines and who seem intent on capturing them. They are rescued by the wizard Cadellin, who reveals that the forces of darkness are massing at the Edge in search of a powerful magical talisman, the eponymous "weirdstone of Brisingamen". Whilst writing in his spare time Garner attempted to gain employment as a teacher, but soon gave that up, believing that "I couldn't write and teach; the energies were too similar." Instead, he worked off and on as a general labourer for four years, remaining unemployed for much of that time. Garner sent his debut novel to the publishing company Collins, where it was picked up by the company's head, Sir William Collins, who was on the lookout for new fantasy novels following the recent commercial and critical success of J. R. R. Tolkien's The Lord of the Rings (1954–55). Garner, who went on to become a personal friend of Collins, would later relate that "Billy Collins saw a title with funny-looking words in it on the stockpile, and he decided to publish it." On its release in 1960, The Weirdstone of Brisingamen proved to be a critical and commercial success, later being described as "a tour de force of the imagination, a novel that showed almost every writer who came afterwards what it was possible to achieve in novels ostensibly published for children." Garner himself however would later denounce his first novel as "a fairly bad book" in 1968. With his first book published, Garner abandoned his work as a labourer and gained a job as a freelance television reporter, living a "hand to mouth" lifestyle on a "shoestring" budget. He also began a sequel to The Weirdstone of Brisingamen, which would be known as The Moon of Gomrath. The Moon of Gomrath also revolves around the adventures of Colin and Susan, with the latter being possessed by a malevolent creature called the Brollachan who has recently re-entered the world, having been freed from its underground prison by workmen. With the help of the wizard Cadellin, the Brollachan is exorcised, but Susan's soul also leaves her body, being sent to another dimension, leaving Colin to find a way to bring it back. Critic Neil Philip characterised it as "an artistic advance" but "a less satisfying story". In a 1989 interview, Garner stated that he had left scope for a third book following the adventures of Colin and Susan, envisioning a trilogy, but that he had intentionally decided not to write it, instead moving on to write something different. However Boneland, the conclusion to the sequence, was belatedly published in August 2012. Elidor, The Owl Service and Red Shift: 1964–73 In 1962, Garner began work on a radio play entitled Elidor, which eventually became a novel of the same name. Set in contemporary Manchester, Elidor tells the story of four children who enter a derelict Victorian church and find a portal to the magical realm of Elidor. In Elidor, they are entrusted by King Malebron to help rescue four treasures which have been stolen by the forces of evil, who are attempting to take control of the kingdom. The children succeed and return to Manchester with the treasures, but are pursued by the malevolent forces who need the items to seal their victory. Before writing Elidor, Garner had seen a dinner service set which could be arranged to make pictures of either flowers or owls. Inspired by this design, he produced his fourth novel, The Owl Service. The story, which was heavily influenced by the Medieval Welsh tale of Math fab Mathonwy from the Mabinogion, was critically acclaimed, winning both the Carnegie Medal and Guardian Children's Fiction Prize. It also sparked discussions among critics as to whether Garner should properly be considered a children's writer, given that this book in particular was deemed equally suitable for an adult readership. It took Garner six years to write his next novel, Red Shift. The book centres on three intertwined love stories, one set in the present, another during the English Civil War, and the third in the second century CE. Philip referred to it as "a complex book but not a complicated one: the bare lines of story and emotion stand clear". Academic specialist in children's literature Maria Nikolajeva characterised Red Shift as "a difficult book" for an unprepared reader, identifying its main themes as those of "loneliness and failure to communicate". Ultimately, she thought that repeated re-readings of the novel bring about the realisation that "it is a perfectly realistic story with much more depth and psychologically more credible than the most so-called "realistic" juvenile novels." The Stone Book series and folkloric collections: 1974–94 From 1976 to 1978, Garner published a series of four novellas, which have come to be collectively known as The Stone Book quartet: The Stone Book, Granny Reardun, The Aimer Gate, and Tom Fobble's Day. Each focused on a day in the life of a child in the Garner family, each from a different generation. In a 1989 interview, Garner noted that although writing The Stone Book Quartet had been "exhausting", it had been "the most rewarding of everything" he'd done to date. Philip described the quartet as "a complete command of the material he had been working and reworking since the start of his career". Garner pays particular attention to language, and strives to render the cadence of the Cheshire tongue in modern English. This he explains by the sense of anger he felt on reading Sir Gawain and the Green Knight: the footnotes would not have been needed by his father. In 1981, the literary critic Neil Philip published an analysis of Garner's novels as A Fine Anger, which was based on his doctoral thesis, produced for the University of London in 1980. In this study he noted that "The Stone Book quartet marks a watershed in Garner's writing career, and provides a suitable moment for an evaluation of his work thus far." Strandloper, Thursbitch, Boneland, Where Shall We Run To? and Treacle Walker: 1996–present In 1996, Garner's novel Strandloper was published. In 1997, he next wrote The Voice That Thunders, a collection of essays and public talks that contains much autobiographical material (including an account of his life with bipolar disorder), as well as critical reflection upon folklore and language, literature and education, the nature of myth and time. In The Voice That Thunders, he reveals the commercial pressure placed upon him during the decade-long drought which preceded Strandloper to 'forsake "literature", and become instead a "popular" writer, cashing in on my established name by producing sequels to, and making series of, the earlier books'. Garner feared that "making series ... would render sterile the existing work, the life that produced it, and bring about my artistic and spiritual death" and felt unable to comply. Garner's novel Thursbitch was published in 2003. The novel Boneland was published in 2012, nominally completing a trilogy begun some 50 years earlier with The Weirdstone of Brisingamen. In August 2018, Garner published his only set of memoirs, Where Shall We Run To?, which describes his childhood during the Second World War. The novel Treacle Walker was published in October 2021 and nominated to the shortlist for the 2022 Booker Prize. Personal life With his first wife Ann Cook he had three children. In 1972, he married for a second time, this time to Griselda Greaves, a teacher and critic with whom he had two children. In a 2014 interview conducted with Mike Pitts for British Archaeology magazine, Garner stated that "I don't have anything to do with the literary world. I avoid writers. I don't like them. Most of my close personal friends are professional archaeologists." Literary style Although Garner's early work is often labelled as "children's literature", Garner himself rejects such a description, informing one interviewer that "I certainly have never written for children" but that instead, he has always written purely for himself. Neil Philip, in his critical study of Garner's work (1981), commented that up until that point "Everything Alan Garner has published has been published for children", although he went on to relate that "It may be that Garner's is a case" where the division between children's and adults' literature is "meaningless" and that his fiction is instead "enjoyed by a type of person, no matter what their age." He said "An adult point of view would not give me the ability to be as fresh in my vision as a child's point of view, because the child is still discovering the universe and many adults are not." Philip offered the opinion that the "essence of his work" was "the struggle to render the complex in simple, bare terms; to couch the abstract in the concrete and communicate it directly to the reader". He added that Garner's work is "intensely autobiographical, in both obvious and subtle ways". Highlighting Garner's use of mythological and folkloric sources, Philip stated that his work explores "the disjointed and troubled psychological and emotional landscape of the twentieth century through the symbolism of myth and folklore." He also expressed the opinion that "Time is Garner's most consistent theme". The English author and academic Catherine Butler noted that Garner was attentive to the "geological, archaeological and cultural history of his settings, and careful to integrate his fiction with the physical reality beyond the page." As a part of this, Garner had included maps of Alderley Edge in both The Weirdstone of Brisingamen and The Moon of Gomrath. Garner has spent much time investigating the areas that he deals with in his books; writing in the Times Literary Supplement in 1968, Garner commented that in preparation for writing his book Elidor: I had to read extensively textbooks on physics, Celtic symbolism, unicorns, medieval watermarks, megalithic archaeology; study the writings of Jung; brush up my Plato; visit Avebury, Silbury and Coventry Cathedral; spend a lot of time with demolition gangs on slum clearance sites; and listen to the whole of Britten's War Requiem nearly every day. Recognition and legacy In a paper published in the Children's Literature Association Quarterly, Maria Nikolajeva characterised Garner as "one of the most controversial" authors of modern children's literature. In the fiftieth anniversary edition of The Weirdstone of Brisingamen, published by HarperCollins in 2010, several notable British fantasists praised Garner and his work. Susan Cooper wrote that "The power and range of Alan Garner's astounding talent has grown with every book he's written", and David Almond called him one of Britain's "greatest writers" whose works "really matter". Philip Pullman, the author of the His Dark Materials trilogy, went further: Garner is indisputably the great originator, the most important British writer of fantasy since Tolkien, and in many respects better than Tolkien, because deeper and more truthful... Any country except Britain would have long ago recognised his importance, and celebrated it with postage stamps and statues and street-names. But that's the way with us: our greatest prophets go unnoticed by the politicians and the owners of media empires. I salute him with the most heartfelt respect and admiration. Another British fantasy writer, Neil Gaiman, claimed that "Garner's fiction is something special" in that it was "smart and challenging, based in the here and the now, in which real English places emerged from the shadows of folklore, and in which people found themselves walking, living and battling their way through the dreams and patterns of myth." Praise also came from Nick Lake, the editorial director of HarperCollins Children's Books, who proclaimed that "Garner is, quite simply, one of the greatest and most influential writers this country has ever produced." Emma Donoghue recalls reading Red Shift as a teenager: "It looked like other Garners I had read: a children's fantasy. But Red Shift, with its passionately bickering adolescent lovers and vertiginous plunges through the wormhole of time, shook me to my core every time I read it, and still does... Garner makes the past numinous, terrifyingly real: anything but passed." Awards The biennial Hans Christian Andersen Award conferred by the International Board on Books for Young People is the highest recognition available to a writer or illustrator of children's books. Garner was the sole runner-up for the writing award in 1978. Garner was appointed Officer of the Order of the British Empire (OBE) for services to literature in the 2001 New Year's Honours list. He received the British Fantasy Society's occasional Karl Edward Wagner Award in 2003 and the World Fantasy Award for Life Achievement in 2012. In January 2011, the University of Warwick awarded the degree of Doctor of Letters (honoris causa). On that occasion he gave a half-hour interview about his work. He has also been awarded honorary doctorates from the University of Salford (2011) and the University of Huddersfield in (2012). He has been recognised several times for particular works. The Owl Service (1967) won both the Carnegie Medal and the Guardian Children's Fiction Prize, For the 70th anniversary of the Carnegie in 2007 it was named one of the top ten Medal-winning works, selected by a panel to compose the ballot for a public election of the all-time favourite. The Weirdstone of Brisingamen (1960) was named to the Lewis Carroll Shelf Award list by the University of Wisconsin–Madison School of Education in 1970, denoting that it "belongs on the same shelf" with the 1865 classic Alice in Wonderland and its sequel. The Stone Book (1976), first in the Stone Book series, won the 1996 Phoenix Award as the best English-language children's book that did not win a major award when it was originally published twenty years earlier. The 1981 film Images won First Prize at the Chicago International Film Festival Treacle Walker was shortlisted for the 2022 Booker Prize, making Garner the oldest writer nominated at the time. Television, radio, and other adaptations The Weirdstone of Brisingamen was dramatised in 6 30-minute parts by Nan Macdonald for the BBC's Home Service broadcast in November 1963. Elidor was read in instalments by John Stride for the BBC's Jackanory programme in June 1968. The Owl Service (1969), a British TV series transmitted by Granada Television based on Garner's novel of the same name. A second adaptation of Elidor was read on a BBC Radio 4 in July 1972. Red Shift (BBC, transmitted 17 January 1978); directed by John Mackenzie; part of the BBC's Play for Today series. To Kill a King (1980), part of the BBC series of plays on supernatural themes, Leap in the Dark: an atmospheric story about a writer overcoming depression and writer's block. The hero's home appears to be Garner's own house. The Keeper (ITV, transmitted 13 June 1983), an episode of the ITV children's series Dramarama: Spooky series Garner and Don Webb adapted Elidor as a BBC children's television series shown in 1995, comprising six half-hour episodes, starring Damian Zuk as Roland and Suzanne Shaw as Helen. The Owl Service was adapted for the stage in 2004 by The Drum Theatre in Plymouth. Elidor was dramatised as a radio play in four-parts by Don Webb, broadcast on BBC Radio 4 Extra in 2011. Works Novels The Weirdstone of Brisingamen, 1960 The Moon of Gomrath, 1963 Elidor, 1965 The Owl Service, 1967 Red Shift, 1973 Strandloper, 1996 Thursbitch, 2003 Boneland, 2012 Treacle Walker, 2021 Short story collections The Hamish Hamilton Book of Goblins, 1969 The Guizer: A Book of Fools, 1975 The Stone Book Quartet, 1979 The Lad of the Gad, 1980 Fairytales of Gold, 1980, (Illustrated by Michael Foreman). Book of British Fairy Tales, 1984, (Illustrated by Derek Collard). A Bag of Moonshine, 1986, (Illustrated by P. J. Lynch). Once Upon a Time, 1993 Collected Folk Tales, 2011 Other books Holly from the Bongs: A Nativity Play, 1966 The Old Man of Mow, 1967 The Breadhorse, 1975 Jack and the Beanstalk, 1992, (Illustrated by Julek Heller). The Little Red Hen, 1997 The Well of the Wind, 1998 Grey Wolf, Prince Jack and the Firebird, 1998 The Voice That Thunders, 1997 Where Shall We Run To?, 2018 See also References Footnotes Sources Further reading External links Alan Garner coverage by The Guardian'' Alan Garner papers at the University of Oregon Special Collections and University Archives English short story writers English children's writers English fantasy writers Carnegie Medal in Literature winners Fellows of the Royal Society of Literature Guardian Children's Fiction Prize winners Officers of the Order of the British Empire Alumni of Magdalen College, Oxford People educated at Manchester Grammar School People from Alderley Edge People from Congleton People with bipolar disorder World Fantasy Award-winning writers 1934 births Living people English male novelists

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https://en.wikipedia.org/wiki/Algebraic%20number

Algebraic number

An algebraic number is a number that is a root of a non-zero polynomial in one variable with integer (or, equivalently, rational) coefficients. For example, the golden ratio, , is an algebraic number, because it is a root of the polynomial . That is, it is a value for x for which the polynomial evaluates to zero. As another example, the complex number is algebraic because it is a root of . All integers and rational numbers are algebraic, as are all roots of integers. Real and complex numbers that are not algebraic, such as and , are called transcendental numbers. The set of algebraic numbers is countably infinite and has measure zero in the Lebesgue measure as a subset of the uncountable complex numbers. In that sense, almost all complex numbers are transcendental. Examples All rational numbers are algebraic. Any rational number, expressed as the quotient of an integer and a (non-zero) natural number , satisfies the above definition, because is the root of a non-zero polynomial, namely . Quadratic irrational numbers, irrational solutions of a quadratic polynomial with integer coefficients , , and , are algebraic numbers. If the quadratic polynomial is monic (), the roots are further qualified as quadratic integers. Gaussian integers, complex numbers for which both and are integers, are also quadratic integers. This is because and are the two roots of the quadratic . A constructible number can be constructed from a given unit length using a straightedge and compass. It includes all quadratic irrational roots, all rational numbers, and all numbers that can be formed from these using the basic arithmetic operations and the extraction of square roots. (By designating cardinal directions for +1, −1, +, and −, complex numbers such as are considered constructible.) Any expression formed from algebraic numbers using any combination of the basic arithmetic operations and extraction of th roots gives another algebraic number. Polynomial roots that cannot be expressed in terms of the basic arithmetic operations and extraction of th roots (such as the roots of ). That happens with many but not all polynomials of degree 5 or higher. Values of trigonometric functions of rational multiples of (except when undefined): for example, , , and satisfy . This polynomial is irreducible over the rationals and so the three cosines are conjugate algebraic numbers. Likewise, , , , and satisfy the irreducible polynomial , and so are conjugate algebraic integers. Some but not all irrational numbers are algebraic: The numbers and are algebraic since they are roots of polynomials and , respectively. The golden ratio is algebraic since it is a root of the polynomial . The numbers and e are not algebraic numbers (see the Lindemann–Weierstrass theorem). Properties If a polynomial with rational coefficients is multiplied through by the least common denominator, the resulting polynomial with integer coefficients has the same roots. This shows that an algebraic number can be equivalently defined as a root of a polynomial with either integer or rational coefficients. Given an algebraic number, there is a unique monic polynomial with rational coefficients of least degree that has the number as a root. This polynomial is called its minimal polynomial. If its minimal polynomial has degree , then the algebraic number is said to be of degree . For example, all rational numbers have degree 1, and an algebraic number of degree 2 is a quadratic irrational. The algebraic numbers are dense in the reals. This follows from the fact they contain the rational numbers, which are dense in the reals themselves. The set of algebraic numbers is countable (enumerable), and therefore its Lebesgue measure as a subset of the complex numbers is 0 (essentially, the algebraic numbers take up no space in the complex numbers). That is to say, "almost all" real and complex numbers are transcendental. All algebraic numbers are computable and therefore definable and arithmetical. For real numbers and , the complex number is algebraic if and only if both and are algebraic. Field The sum, difference, product and quotient (if the denominator is nonzero) of two algebraic numbers is again algebraic, as can be demonstrated by using the resultant, and algebraic numbers thus form a field (sometimes denoted by , but that usually denotes the adele ring). Every root of a polynomial equation whose coefficients are algebraic numbers is again algebraic. That can be rephrased by saying that the field of algebraic numbers is algebraically closed. In fact, it is the smallest algebraically-closed field containing the rationals and so it is called the algebraic closure of the rationals. The set of real algebraic numbers itself forms a field. Related fields Numbers defined by radicals Any number that can be obtained from the integers using a finite number of additions, subtractions, multiplications, divisions, and taking (possibly complex) th roots where is a positive integer are algebraic. The converse, however, is not true: there are algebraic numbers that cannot be obtained in this manner. These numbers are roots of polynomials of degree 5 or higher, a result of Galois theory (see Quintic equations and the Abel–Ruffini theorem). For example, the equation: has a unique real root that cannot be expressed in terms of only radicals and arithmetic operations. Closed-form number Algebraic numbers are all numbers that can be defined explicitly or implicitly in terms of polynomials, starting from the rational numbers. One may generalize this to "closed-form numbers", which may be defined in various ways. Most broadly, all numbers that can be defined explicitly or implicitly in terms of polynomials, exponentials, and logarithms are called "elementary numbers", and these include the algebraic numbers, plus some transcendental numbers. Most narrowly, one may consider numbers explicitly defined in terms of polynomials, exponentials, and logarithms – this does not include all algebraic numbers, but does include some simple transcendental numbers such as or ln 2. Algebraic integers An algebraic integer is an algebraic number that is a root of a polynomial with integer coefficients with leading coefficient 1 (a monic polynomial). Examples of algebraic integers are and Therefore, the algebraic integers constitute a proper superset of the integers, as the latter are the roots of monic polynomials for all . In this sense, algebraic integers are to algebraic numbers what integers are to rational numbers. The sum, difference and product of algebraic integers are again algebraic integers, which means that the algebraic integers form a ring. The name algebraic integer comes from the fact that the only rational numbers that are algebraic integers are the integers, and because the algebraic integers in any number field are in many ways analogous to the integers. If is a number field, its ring of integers is the subring of algebraic integers in , and is frequently denoted as . These are the prototypical examples of Dedekind domains. Special classes Algebraic solution Gaussian integer Eisenstein integer Quadratic irrational number Fundamental unit Root of unity Gaussian period Pisot–Vijayaraghavan number Salem number Notes References

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https://en.wikipedia.org/wiki/Automorphism

Automorphism

In mathematics, an automorphism is an isomorphism from a mathematical object to itself. It is, in some sense, a symmetry of the object, and a way of mapping the object to itself while preserving all of its structure. The set of all automorphisms of an object forms a group, called the automorphism group. It is, loosely speaking, the symmetry group of the object. Definition In the context of abstract algebra, a mathematical object is an algebraic structure such as a group, ring, or vector space. An automorphism is simply a bijective homomorphism of an object with itself. (The definition of a homomorphism depends on the type of algebraic structure; see, for example, group homomorphism, ring homomorphism, and linear operator.) The identity morphism (identity mapping) is called the trivial automorphism in some contexts. Respectively, other (non-identity) automorphisms are called nontrivial automorphisms. The exact definition of an automorphism depends on the type of "mathematical object" in question and what, precisely, constitutes an "isomorphism" of that object. The most general setting in which these words have meaning is an abstract branch of mathematics called category theory. Category theory deals with abstract objects and morphisms between those objects. In category theory, an automorphism is an endomorphism (i.e., a morphism from an object to itself) which is also an isomorphism (in the categorical sense of the word, meaning there exists a right and left inverse endomorphism). This is a very abstract definition since, in category theory, morphisms are not necessarily functions and objects are not necessarily sets. In most concrete settings, however, the objects will be sets with some additional structure and the morphisms will be functions preserving that structure. Automorphism group If the automorphisms of an object form a set (instead of a proper class), then they form a group under composition of morphisms. This group is called the automorphism group of . Closure Composition of two automorphisms is another automorphism. Associativity It is part of the definition of a category that composition of morphisms is associative. Identity The identity is the identity morphism from an object to itself, which is an automorphism. Inverses By definition every isomorphism has an inverse that is also an isomorphism, and since the inverse is also an endomorphism of the same object it is an automorphism. The automorphism group of an object X in a category C is denoted AutC(X), or simply Aut(X) if the category is clear from context. Examples In set theory, an arbitrary permutation of the elements of a set X is an automorphism. The automorphism group of X is also called the symmetric group on X. In elementary arithmetic, the set of integers, Z, considered as a group under addition, has a unique nontrivial automorphism: negation. Considered as a ring, however, it has only the trivial automorphism. Generally speaking, negation is an automorphism of any abelian group, but not of a ring or field. A group automorphism is a group isomorphism from a group to itself. Informally, it is a permutation of the group elements such that the structure remains unchanged. For every group G there is a natural group homomorphism G → Aut(G) whose image is the group Inn(G) of inner automorphisms and whose kernel is the center of G. Thus, if G has trivial center it can be embedded into its own automorphism group. In linear algebra, an endomorphism of a vector space V is a linear operator V → V. An automorphism is an invertible linear operator on V. When the vector space is finite-dimensional, the automorphism group of V is the same as the general linear group, GL(V). (The algebraic structure of all endomorphisms of V is itself an algebra over the same base field as V, whose invertible elements precisely consist of GL(V).) A field automorphism is a bijective ring homomorphism from a field to itself. In the cases of the rational numbers (Q) and the real numbers (R) there are no nontrivial field automorphisms. Some subfields of R have nontrivial field automorphisms, which however do not extend to all of R (because they cannot preserve the property of a number having a square root in R). In the case of the complex numbers, C, there is a unique nontrivial automorphism that sends R into R: complex conjugation, but there are infinitely (uncountably) many "wild" automorphisms (assuming the axiom of choice). Field automorphisms are important to the theory of field extensions, in particular Galois extensions. In the case of a Galois extension L/K the subgroup of all automorphisms of L fixing K pointwise is called the Galois group of the extension. The automorphism group of the quaternions (H) as a ring are the inner automorphisms, by the Skolem–Noether theorem: maps of the form . This group is isomorphic to SO(3), the group of rotations in 3-dimensional space. The automorphism group of the octonions (O) is the exceptional Lie group G2. In graph theory an automorphism of a graph is a permutation of the nodes that preserves edges and non-edges. In particular, if two nodes are joined by an edge, so are their images under the permutation. In geometry, an automorphism may be called a motion of the space. Specialized terminology is also used: In metric geometry an automorphism is a self-isometry. The automorphism group is also called the isometry group. In the category of Riemann surfaces, an automorphism is a biholomorphic map (also called a conformal map), from a surface to itself. For example, the automorphisms of the Riemann sphere are Möbius transformations. An automorphism of a differentiable manifold M is a diffeomorphism from M to itself. The automorphism group is sometimes denoted Diff(M). In topology, morphisms between topological spaces are called continuous maps, and an automorphism of a topological space is a homeomorphism of the space to itself, or self-homeomorphism (see homeomorphism group). In this example it is not sufficient for a morphism to be bijective to be an isomorphism. History One of the earliest group automorphisms (automorphism of a group, not simply a group of automorphisms of points) was given by the Irish mathematician William Rowan Hamilton in 1856, in his icosian calculus, where he discovered an order two automorphism, writing: so that is a new fifth root of unity, connected with the former fifth root by relations of perfect reciprocity. Inner and outer automorphisms In some categories—notably groups, rings, and Lie algebras—it is possible to separate automorphisms into two types, called "inner" and "outer" automorphisms. In the case of groups, the inner automorphisms are the conjugations by the elements of the group itself. For each element a of a group G, conjugation by a is the operation given by (or a−1ga; usage varies). One can easily check that conjugation by a is a group automorphism. The inner automorphisms form a normal subgroup of Aut(G), denoted by Inn(G); this is called Goursat's lemma. The other automorphisms are called outer automorphisms. The quotient group is usually denoted by Out(G); the non-trivial elements are the cosets that contain the outer automorphisms. The same definition holds in any unital ring or algebra where a is any invertible element. For Lie algebras the definition is slightly different. See also Antiautomorphism Automorphism (in Sudoku puzzles) Characteristic subgroup Endomorphism ring Frobenius automorphism Morphism Order automorphism (in order theory). Relation-preserving automorphism Fractional Fourier transform References External links Automorphism at Encyclopaedia of Mathematics Morphisms Abstract algebra Symmetry

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https://en.wikipedia.org/wiki/Accordion

Accordion

Accordions (from 19th-century German , from —"musical chord, concord of sounds") are a family of box-shaped musical instruments of the bellows-driven free reed aerophone type (producing sound as air flows past a reed in a frame). The essential characteristic of the accordion is to combine in one instrument a melody section, also called the diskant, usually on the right-hand keyboard, with an accompaniment or Basso continuo functionality on the left-hand. The musician normally plays the melody on buttons or keys on the right-hand side (referred to as the keyboard or sometimes the manual), and the accompaniment on bass or pre-set chord buttons on the left-hand side. A person who plays the accordion is called an accordionist. The accordion belongs to the free-reed aerophone family. Other instruments in this family include the concertina, harmonica, and bandoneon. The concertina and bandoneon do not have the melody–accompaniment duality. The harmoneon is also related and, while having the descant vs. melody dualism, tries to make it less pronounced. The harmonium and American reed organ are in the same family, but are typically larger than an accordion and sit on a surface or the floor. The accordion is played by compressing or expanding the bellows while pressing buttons or keys, causing pallets to open, which allow air to flow across strips of brass or steel, called reeds. These vibrate to produce sound inside the body. Valves on opposing reeds of each note are used to make the instrument's reeds sound louder without air leaking from each reed block. The accordion is widely spread across the world because of the waves of migration from Europe to the Americas and other regions. In some countries (for example: Argentina, Brazil, Colombia, the Dominican Republic, Mexico, and Panama) it is used in popular music (for example: chamamé in Argentina; gaucho, forró, and sertanejo in Brazil; vallenato in Colombia; merengue in the Dominican Republic; and norteño in Mexico), whereas in other regions (such as Europe, North America, and other countries in South America) it tends to be more used for dance-pop and folk music. In Europe and North America, some popular music acts also make use of the instrument. Additionally, the accordion is used in cajun, zydeco, jazz, and klezmer music, and in both solo and orchestral performances of classical music. Many conservatories in Europe have classical accordion departments. The oldest name for this group of instruments is harmonika, from the Greek , meaning "harmonic, musical". Today, native versions of the name accordion are more common. These names refer to the type of accordion patented by Cyrill Demian, which concerned "automatically coupled chords on the bass side". History The accordion's basic form is believed to have been invented in Berlin, in 1822, by Christian Friedrich Ludwig Buschmann, although one instrument was discovered in 2006 that appears to have been built earlier. The earliest history of the accordion in Russia is poorly documented. Nevertheless, according to Russian researchers, the earliest known simple accordions were made in Tula, Russia, by Ivan Sizov and Timofey Vorontsov around 1830, after they received an early accordion from Germany. By the late 1840s, the instrument was already very widespread;<ref>[http://publ.lib.ru/ARCHIVES/__Raritetnye_knigi/IRGO_Etnograficheskij_sbornik_02_1854.pdf Etnograficheskii sbornik Russkogo geograficheskogo obshchestva. Vol. 2] , Saint Petersburg, 1854. pp. 26, 162.</ref> together the factories of the two masters were producing 10,000 instruments a year. By 1866, over 50,000 instruments were being produced yearly by Tula and neighbouring villages, and by 1874 the yearly production was over 700,000. By the 1860s, Novgorod, Vyatka and Saratov governorates also had significant accordion production. By the 1880s, the list included Oryol, Ryazan, Moscow, Tver, Vologda, Kostroma, Nizhny Novgorod and Simbirsk, and many of these places created their own varieties of the instrument. The accordion is one of several European inventions of the early 19th century that use free reeds driven by a bellows. An instrument called accordion was first patented in 1829 by Cyrill Demian, of Armenian origin, in Vienna. Demian's instrument bore little resemblance to modern instruments. It only had a left hand buttonboard, with the right hand simply operating the bellows. One key feature for which Demian sought the patent was the sounding of an entire chord by depressing one key. His instrument also could sound two different chords with the same key, one for each bellows direction (a bisonoric action). At that time in Vienna, mouth harmonicas with Kanzellen (chambers) had already been available for many years, along with bigger instruments driven by hand bellows. The diatonic key arrangement was also already in use on mouth-blown instruments. Demian's patent thus covered an accompanying instrument: an accordion played with the left hand, opposite to the way that contemporary chromatic hand harmonicas were played, small and light enough for travelers to take with them and used to accompany singing. The patent also described instruments with both bass and treble sections, although Demian preferred the bass-only instrument owing to its cost and weight advantages. The accordion was introduced from Germany into Britain in about the year 1828. The instrument was noted in The Times in 1831 as one new to British audiences and was not favourably reviewed, but nevertheless it soon became popular. It had also become popular with New Yorkers by the mid-1840s. After Demian's invention, other accordions appeared, some featuring only the right-handed keyboard for playing melodies. It took English inventor Charles Wheatstone to bring both chords and keyboard together in one squeezebox. His 1844 patent for what he called a concertina also featured the ability to easily tune the reeds from the outside with a simple tool. The Austrian musician Adolf Müller described a great variety of instruments in his 1854 book . At the time, Vienna and London had a close musical relationship, with musicians often performing in both cities in the same year, so it is possible that Wheatstone was aware of this type of instrument and may have used them to put his key-arrangement ideas into practice. Jeune's flutina resembles Wheatstone's concertina in internal construction and tone colour, but it appears to complement Demian's accordion functionally. The flutina is a one-sided bisonoric melody-only instrument whose keys are operated with the right hand while the bellows is operated with the left. When the two instruments are combined, the result is quite similar to diatonic button accordions still manufactured today. Further innovations followed and continue to the present. Various buttonboard and keyboard systems have been developed, as well as voicings (the combination of multiple tones at different octaves), with mechanisms to switch between different voices during performance, and different methods of internal construction to improve tone, stability and durability. Modern accordions may incorporate electronics such as condenser microphones and tone and volume controls, so that the accordion can be plugged into a PA system or keyboard amplifier for live shows. Some 2010s-era accordions may incorporate MIDI sensors and circuitry, enabling the accordion to be plugged into a synth module and produce accordion sounds or other synthesized instrument sounds, such as piano or organ. Construction Accordions have many configurations and types. What may be easy to do with one type of accordion could be technically challenging or impossible with another, and proficiency with one layout may not translate to another. The most obvious difference between accordions is their right-hand sides. Piano accordions use a piano-style musical keyboard; button accordions use a buttonboard. Button accordions are furthermore differentiated by their usage of a chromatic or diatonic buttonboard for the right-hand side. Accordions may be either bisonoric, producing different pitches depending on the direction of bellows movement, or unisonoric, producing the same pitch in both directions. Piano accordions are unisonoric. Chromatic button accordions also tend to be unisonoric, while diatonic button accordions tend to be bisonoric, though notable exceptions exist. Accordion size is not standardized, and may vary significantly from model to model. Accordions vary not only in their dimensions and weight, but also in number of buttons or keys present in the right- and left-hand keyboards. For example, piano accordions may have as few as 8 bass buttons (two rows of four), or up to 140 (seven rows of twenty) or beyond. Accordions also vary by their available registers and by their specific tuning and voicing. Despite these differences, all accordions share a number of common components. Universal components Bellows The bellows is the most recognizable part of the instrument, and the primary means of articulation. The production of sound in an accordion is in direct proportion to the motion of the bellows by the player. In a sense, the role of the bellows can be compared to the role of moving a violin's bow on bowed strings. For a more direct analogy, the bellows can be compared to the role of breathing for a singer. The bellows is located between the right- and left-hand keyboards, and is made from pleated layers of cloth and cardboard, with added leather and metal. It is used to create pressure and vacuum, driving air across the internal reeds and producing sound by their vibrations, applied pressure increases the volume. The keyboard touch is not expressive and does not affect dynamics: all expression is effected through the bellows. Bellows effects include: Volume control, including swells and fades Repeated short, rapid changes of direction ("bellows shake"), which has been popularized by musicians such as Renato Borghetti (gaucho music) and Luiz Gonzaga, and extensively used in Forró, called resfulego in Brazil Constant bellows motion while applying pressure at intervals Constant bellows motion to produce clear tones with no resonance Subtly changing the intonation to mimic the expressiveness of a singer Using the bellows with the silent air button gives the sound of air moving ("whooshing"), which is sometimes used in contemporary compositions for this instrument Body The accordion's body consists of two boxes, commonly made of wood, joined by the bellows. These boxes house reed chambers for the right- and left-hand keyboards. Each side has grilles in order to facilitate the transmission of air in and out of the instrument, and to allow the sound to project. The grille at the right-hand side is usually larger and is often shaped for decorative purposes. The right-hand keyboard is normally used for playing the melody and the left-hand one for playing the accompaniment; however, skilled players can reverse these roles and play melodies with the left hand. The size and weight of an accordion varies depending on its type, layout and playing range, which can be as small as to have only one or two rows of basses and a single octave on the right-hand keyboard, to the most common 120-bass accordion and through to large and heavy 160-bass free-bass converter models. Pallet mechanism The accordion is an aerophone. The keyboard mechanisms of the instrument either enable the air flow, or disable it: Variable components The term accordion covers a wide range of instruments, with varying components. All instruments have reed ranks of some format, apart from reedless digital accordions. Not all have switches to change registers or ranks, as some have only one treble register and one bass register. The most typical accordion is the piano accordion, which is used for many musical genres. Another type of accordion is the button accordion, which is used in musical traditions including Cajun, Conjunto and Tejano music, Swiss and Slovenian-Austro-German Alpine music, and Argentinian tango music. The Helikon-style accordion has multiple flared horns projecting out of the left side to strengthen the bass tone. The word "Helikon" refers to a deep-pitched tuba. Right-hand keyboard systems Different systems exist for the right-hand keyboard of an accordion, which is normally used for playing the melody (while it can also play chords). Some use a button layout arranged in one way or another, while others use a piano-style keyboard. Each system has different claimed benefits by those who prefer it. They are also used to define one accordion or another as a different "type": Chromatic button accordions and the bayan, a Russian variant, use a buttonboard where notes are arranged chromatically. Two major systems exist, referred to as the B-system and the C-system (there are also regional variants). Rarely, some chromatic button accordions have a decorative right-hand keyboard in addition to the rows of buttons, an approach used by the virtuoso accordionist Pietro Frosini. Diatonic button accordions use a buttonboard designed around the notes of diatonic scales in a small number of keys. The keys are often arranged in one row for each key available. Chromatic scales may be available by combining notes from different rows. The adjective "diatonic" is also commonly used to describe bisonic or bisonoric accordions—that is, instruments whose right-hand (and in some instances even bass) keys each sound two different notes depending on the direction of the bellows (for instance, producing major triad sequences while closing the bellows and dominant seventh or 7–9 while opening). Such is the case, for instance, with the Argentinian bandoneon, the Slovenian-Austro-German Steirische Harmonika, the Czech Heligonka Harmonika, the Italian organetto, the Swiss Schwyzerörgeli and the Anglo concertina. Piano accordions use a musical keyboard similar to a piano, at right angles to the cabinet, the tops of the keys inward toward the bellows. The rarely used bass accordion has only a right-hand keyboard, with ranks of 8', 16', and 32' reeds, with the lowest note being the deepest pitch on a pipe organ pedal keyboard (pedal C). It is intended for performing basslines in accordion orchestras. The rarely used piccolo accordion also has only a right-hand keyboard. 6-plus-6 accordions use a buttonboard with three rows of buttons in a "uniform" or "whole-tone" arrangement, generally known as a Jankó keyboard. The chromatic scale consists of two rows. The third row is a repetition of the first row, so there is the same fingering in all twelve scales. These accordions are produced only in special editions e.g. the logicordion produced by Harmona. Left-hand keyboard systems Different systems are also in use for the left-hand keyboard, which is normally used for playing the accompaniment. These usually use distinct bass buttons and often have buttons with concavities or studs to help the player navigate the layout despite not being able to see the buttons while playing. There are three general categories: The Stradella bass system, also called standard bass, is arranged in a circle of fifths and uses single buttons for bass notes and additional rows of single buttons for preset major, minor, dominant seventh, and diminished chords. The dominant seventh and diminished chords are three-note chord voicings that omit the fifths of the chords. The Belgian bass system is a variation used in Belgian chromatic accordions. It is also arranged in a circle of fifths but in reverse order. This system has three rows of basses, three rows of chord buttons allowing easier fingering for playing melodies, combined chords, better use of fingers one and five, and more space between the buttons. This system was rarely used outside of its native Belgium. Various free-bass systems for greater access to playing melodies and complex basslines on the left-hand keyboard and to forming one's own chords note-by-note. These are often chosen for playing jazz and classical music. Some models can convert between free-bass and Stradella bass; this is called converter bass. The free-bass left hand notes are arranged chromatically in three rows with one additional duplicate row of buttons. Luttbeg double-keyboard piano accordions have a piano keyboard layout on both the treble and bass sides. This allows pianists, most notably Duke Ellington, to double up on the accordion without difficulty. The Bercandeon is an improved version of that instrument, also making it a "keyboard bandoneon". In 2021, a patent was published by Valerio Chiovarelli for a new bass system called the "Chiovarelli Jazz System". This system is a variation of the Stradella bass system where, instead of triads, the chordal buttons of this system produce bichords (chords with only 2 pitches instead of 3). The "Chiovarellia Jazz System" (or "CJS" for short) prioritizes the effectiveness of left hand accordion in jazz music, hence the name of the system, but its chordal combinations can be appliccable to many other genres according to the inventor. Reed ranks and switches Inside the accordion are the reeds that generate the instrument tones. These are organized in different sounding banks, which can be further combined into registers producing differing timbres. All but the smaller accordions are equipped with switches that control which combination of reed banks operate, organized from high to low registers. Each register stop produces a separate sound timbre, many of which also differ in octaves or in how different octaves are combined. See the accordion reed ranks and switches article for further explanation and audio samples. All but the smaller accordions usually have treble switches. The larger and more expensive accordions often also have bass switches to give options for the reed bank on the bass side. Classification of chromatic and piano type accordions In describing or pricing an accordion, the first factor is size, expressed in number of keys on either side. For a piano type, this could for one example be 37/96, meaning 37 treble keys (three octaves plus one note) on the treble side and 96 bass keys. A second aspect of size is the width of the white keys, which means that even accordions with the same number of keys have keyboards of different lengths, ranging from for a child's accordion to for an adult-sized instrument. After size, the price and weight of an accordion is largely dependent on the number of reed ranks on either side, either on a cassotto or not, and to a lesser degree on the number of combinations available through register switches. The next, but important, factor is the quality of the reeds, the highest grade called "a mano" (meaning "hand-made"), the next "tipo a mano" ("like hand-made"), lower grades including "export" and several more. Price is also affected by the use of costly woods, luxury decorations, and features such as a palm switch, grille mute, and so on. Some accordion makers sell a range of different models, from a less-expensive base model to a more costly luxury model. Typically, the register switches are described as Reeds: 5 + 3, meaning five reeds on the treble side and three on the bass, and Registers: 13 + M, 7, meaning 13 register buttons on the treble side plus a special "master" that activates all ranks, like the "tutti" or "full organ" switch on an organ, and seven register switches on the bass side. Another factor affecting the price is the presence of electronics, such as condenser microphones, volume and tone controls, or MIDI sensors and connections. Straps The larger piano and chromatic button accordions are usually heavier than other smaller squeezeboxes, and are equipped with two shoulder straps to make it easier to balance the weight and increase bellows control while sitting, and avoid dropping the instrument while standing. Other accordions, such as the diatonic button accordion, have only a single shoulder strap and a right hand thumb strap. All accordions have a (mostly adjustable) leather strap on the left-hand side to keep the player's hand in position while drawing the bellows. There are also straps above and below the bellows to keep it securely closed when the instrument is not being played. Electronic and digital In the 2010s, a range of electronic and digital accordions were introduced. They have an electronic sound module which creates the accordion sound, and most use MIDI systems to encode the keypresses and transmit them to the sound module. A digital accordion can have hundreds of sounds, which can include different types of accordions and even non-accordion sounds, such as pipe organ, piano, or guitar. Sensors are used on the buttons and keys, such as magnetic reed switches. Sensors are also used on the bellows to transmit the pushing and pulling of the bellows to the sound module. Digital accordions may have features not found in acoustic instruments, such as a piano-style sustain pedal, a modulation control for changing keys, and a portamento effect. As an electronic instrument, these types of accordions are plugged into a PA system or keyboard amplifier to produce sound. Some digital accordions have a small internal speaker and amplifier, so they can be used without a PA system or keyboard amplifier, at least for practicing and small venues like coffeehouses. One benefit of electronic accordions is that they can be practiced with headphones, making them inaudible to other people nearby. On a digital accordion, the volume of the right-hand keyboard and the left-hand buttons can be independently adjusted. Acoustic-digital hybrid accordions also exist. They are acoustic accordions (with reeds, bellows, and so on), but they also contain sensors, electronics, and MIDI connections, which provides a wider range of sound options. An acoustic-digital hybrid may be manufactured in this form, or it may be an acoustic accordion which has had aftermarket electronics sensors and connections added. Several companies sell aftermarket electronics kits, but they are typically installed by professional accordion technicians, because of the complex and delicate nature of the internal parts of an accordion. Unusual accordions Various hybrid accordions have been created between instruments of different buttonboards and actions. Many remain curiosities – only a few have remained in use: The Schrammel accordion, used in Viennese chamber music and klezmer, which has the treble buttonboard of a chromatic button accordion and a bisonoric bass buttonboard, similar to an expanded diatonic button accordion The Steirische Harmonika, a type of bisonoric diatonic button accordion particular to the Alpine folk music of Slovenia, Austria, the Czech Republic, the German state of Bavaria, and the Italian South Tyrol The schwyzerörgeli or Swiss organ, which usually has a three-row diatonic treble and 18 unisonoric bass buttons in a bass/chord arrangement – a subset of the Stradella system in reverse order like the Belgian bass – that travel parallel to the bellows motion The trikitixa of the Basque people, which has a two-row diatonic, bisonoric treble and a 12-button diatonic unisonoric bass The British chromatic accordion, the favoured diatonic accordion in Scotland. While the right hand is bisonoric, the left hand follows the Stradella system. The elite form of this instrument is generally considered the German manufactured Shand Morino, produced by Hohner with the input of Sir Jimmy Shand Pedal harmony, a type of accordion used sometimes in Polish folk music, which has a pair of pump organ-like bellows attached. The Finnish composer and accordionist Veli Kujala developed a quarter tone accordion together with the Italian accordion manufacturer Pigini in 2005, and has written works for it. It deploys the same system as the concert accordion, with a scale of five octaves, each divided into 24 quarter tones. Other notable composers who have written concertos for the quarter tone accordion include Jukka Tiensuu and Sampo Haapamäki. Manufacturing process The most expensive accordions are typically fully hand-made, particularly the reeds; completely hand-made reeds have a better tonal quality than even the best automatically manufactured ones. Some accordions have been modified by individuals striving to bring a more pure sound out of low-end instruments, such as the ones improved by Yutaka Usui, a Japanese craftsman. The manufacture of an accordion is only a partly automated process. In a sense, all accordions are handmade, since there is always some hand assembly of the small parts required. The general process involves making the individual parts, assembling the subsections, assembling the entire instrument, and final decorating and packaging. Notable centres of production are the Italian cities of Stradella and Castelfidardo, with many small and medium size manufacturers especially at the latter. Castelfidardo honours the memory of Paolo Soprani who was one of the first large-scale producers. Maugein Freres has built accordions in the French town of Tulle since 1919, and the company is now the last complete-process manufacturer of accordions in France. German companies such as Hohner and Weltmeister made large numbers of accordions, but production diminished by the end of the 20th century. Hohner still manufactures its top-end models in Germany, and Weltmeister instruments are still handmade by HARMONA Akkordeon GmbH in Klingenthal. Use in various music genres The accordion has traditionally been used to perform folk or ethnic music, popular music, and transcriptions from the operatic and light-classical music repertoire. It was also used by the Kikuyu tribe in Kenya and is the main instrument in the traditional Mwomboko dance. Today the instrument is sometimes heard in contemporary pop styles, such as rock and pop-rock, and occasionally even in serious classical music concerts, as well as advertisements. Use in traditional music The accordion's popularity spread rapidly: it has mostly been associated with the common people, and was propagated by Europeans who emigrated around the world. The accordion in both button and piano forms became a favorite of folk musicians and has been integrated into traditional music styles all over the world: see the list of music styles that incorporate the accordion. Use in jazz Notable jazz accordionists Early jazz accordionists include Charles Melrose, who recorded Wailing Blues/Barrel House Stomp (1930, Voc. 1503) with the Cellar Boys; Buster Moten, who played second piano and accordion in the Bennie Moten orchestra; and Jack Cornell, who did recordings with Irving Mills. Later jazz accordionists from the United States include Steve Bach, Milton DeLugg, Orlando DiGirolamo, Dominic Frontiere, Guy Klucevsek, Yuri Lemeshev, Frank Marocco, John Serry Sr., Lee Tomboulian, and Art Van Damme. French jazz accordionists include Richard Galliano, Bernard Lubat, and Vincent Peirani. Norwegian jazz accordionists include Asmund Bjørken, Stian Carstensen, Gabriel Fliflet, Frode Haltli, and Eivin One Pedersen. Left hand techniques The constraints of the Stradella bass system, limiting the left hand to preset chord buttons, is a barrier to some jazz chord conventions. Jazz accordionists expand the range of chord possibilities by using more than one chord button simultaneously, or by using combinations of a chord button and a bass note other than the typical root of the chord. An example of the former technique is used to play a minor seventh chord. To play an Am7(add9) chord, the Am and Em preset buttons are pressed simultaneously, along with an A bassnote. An example of the latter technique is used to play the half-diminished chord. To play an Eø7, a Gm preset button is pressed along with an E bassnote. For the left hand, the free-bass system is used in jazz as a means of creating complex chord voicings. Jazz harmony that would otherwise be difficult to replicate with the Stradella bass system, such as tritone substitutions, become more accessible using a free-bass accordion. Use in popular music The accordion appeared in popular music from the 1900s to the 1960s. This half-century is often called the "golden age of the accordion". Five players, Pietro Frosini, the two brothers Count Guido Deiro and Pietro Deiro and Slovenian brothers Vilko Ovsenik and Slavko Avsenik, Charles Magnante were major influences at this time. Most vaudeville theaters closed during the Great Depression, but accordionists during the 1930s–1950s taught and performed for radio. Included among this group was the concert virtuoso John Serry, Sr.Jacobson, Marion (2012). Squeeze This: A Cultural History of the Accordion in America. University of Illinois Press, Chicago, p. 61. During the 1950s through the 1980s the accordion received significant exposure on television with performances by Myron Floren on The Lawrence Welk Show. In the late 1950s and early 1960s, the accordion declined in popularity because of the rise of rock and roll. The first accordionist to appear and perform at the Newport Jazz Festival was Angelo DiPippo. He can be seen playing his accordion in the motion picture The Godfather. He also composed and performed with his accordion on part of the soundtrack of Woody Allen's movie To Rome With Love. He was featured twice on The Tonight Show with Johnny Carson. Richard Galliano is an internationally known accordionist whose repertoire covers jazz, tango nuevo, Latin, and classical. Some popular bands use the instrument to create distinctive sounds. A notable example is Grammy Award-winning parodist "Weird Al" Yankovic, who plays the accordion on many of his musical tracks, particularly his polkas. Yankovic was trained in the accordion as a child. The accordion has also been used in the rock genre, most notably by John Linnell of They Might Be Giants, featuring more prominently in the band's earlier works. The instrument is still frequently used during live performances, and continues to make appearances in their studio albums. Accordion is also used in the music of the Dropkick Murphys and Gogol Bordello. Accordionists in heavy metal music make their most extensive appearances in the folk metal subgenre, and are otherwise generally rare. Full-time accordionists in folk metal seem even rarer, but they are still utilized for studio work, as flexible keyboardists are usually more accessible for live performances. The Finnish symphonic folk-metal band Turisas used to have a full-time accordionist, employing classical and polka sensibilities alongside a violinist. One of their accordionists, Netta Skog, is now a member of Ensiferum, another folk-metal band. Another Finnish metal band, Korpiklaani, invokes a type of Finnish polka called humppa, and also has a full-time accordionist. Sarah Kiener, the former hurdy-gurdy player for the Swiss melodic-death-folk metal band Eluveitie, played a Helvetic accordion known as a zugerörgeli. Use in classical music Although best known as a folk instrument, it has grown in popularity among classical composers. The earliest surviving concert piece is , written in 1836 by Louise Reisner of Paris. Other composers, including the Russian Pyotr Ilyich Tchaikovsky, the Italian Umberto Giordano, and the American Charles Ives, wrote works for the diatonic button accordion. The first composer to write specifically for the chromatic accordion was Paul Hindemith. In 1922, the Austrian Alban Berg included an accordion in Wozzeck, Op. 7. In 1937, the first accordion concerto was composed in Russia. Other notable composers have written for the accordion during the first half of the 20th century. Included among this group was the Italian-American John Serry Sr., whose Concerto for Free Bass Accordion was completed in 1964.Accordion World, Bedford Hills, NY, 1968. In addition, the American accordionist Robert Davine composed his Divertimento for Flute, Clarinet, Bassoon and Accordion as a work for chamber orchestra. American composer William P. Perry featured the accordion in his orchestral suite Six Title Themes in Search of a Movie (2008). The experimental composer Howard Skempton began his musical career as an accordionist, and has written numerous solo works for it. In his work Drang (1999), British composer John Palmer pushed the expressive possibilities of the accordion/bayan. Luciano Berio wrote Sequenza XIII (1995) for accordionist Teodoro Anzellotti. Accordionists like Mogens Ellegaard, Joseph Macerollo, Nick Ariondo, Friedrich Lips, Hugo Noth, Stefan Hussong, Teodoro Anzellotti, and Geir Draugsvoll, encouraged composers to write new music for the accordion (solo and chamber music) and also started playing baroque music on the free bass accordion. French composer Henri Dutilleux used an accordion in both his late song cycles Correspondances (2003) and Le Temps l'Horloge (2009). Russian-born composer Sofia Gubaidulina has composed solos, concertos, and chamber works for accordion. Astor Piazzolla's concert tangos are performed widely. Piazzolla performed on the bandoneon, but his works are performed on either bandoneon or accordion. Australia The earliest mention of the novel accordion instrument in Australian music occurs in the 1830s. The accordion initially competed against cheaper and more convenient reed instruments such as mouth organ, concertina and melodeon. Frank Fracchia was an Australian accordion composer and copies of his works "My dear, can you come out tonight" and "Dancing with you" are preserved in Australian libraries. Other Australian composers who arranged music for accordion include Reginald Stoneham. The popularity of the accordion peaked in the late 1930s and continued until the 1950s. The accordion was particularly favoured by buskers. Bosnia and Herzegovina The accordion is a traditional instrument in Bosnia and Herzegovina. It is the dominant instrument used in sevdalinka, a traditional genre of folk music from Bosnia and Herzegovina. It is also considered a national instrument of the country. Brazil The accordion was brought to Brazil by settlers and immigrants from Europe, especially from Italy and Germany, who mainly settled in the south (Rio Grande do Sul, Santa Catarina and Paraná). The first instrument brought was a "Concertina" (a 120 button chromatic accordion). The instrument was popular in the 1950s, and it was common to find several accordions in the same house. There are many different configurations and tunes which were adapted from the cultures that came from Europe. Accordion is the official symbol instrument of the Rio Grande do Sul state, where was voted by unanimity in the deputy chamber. During the boom of accordions there were around 65 factories in Brazil, where most of them (52) in the south, in Rio Grande do Sul state, with only 7 outside the south. One of the most famous and genuinely Brazilian brands was Acordeões Todeschini from Bento Gonçalves-RS, closed in 1973. The Todeschini accordion is very appreciated today and survives with very few maintainers. The most notable musicians of button accordions are Renato Borghetti, Adelar Bertussi, Albino Manique and Edson Dutra. Compared to many other countries, the instrument is very popular in mainstream pop music. In some parts of the country, such as the northeast it is the most popular melodic instrument. As opposed to most European folk accordions, a very dry tuning is usually used in Brazil. Outside the south, the accordion (predominantly the piano accordion) is used in almost all styles of Forró (in particular in the subgenres of Xote and Baião) as the principal instrument, Luiz Gonzaga (the "King of the Baião") and Dominguinhos being among the notable musicians in this style from the northeast. In this musical style the typical combination is a trio of accordion, triangle and zabumba (a type of drum). This style has gained popularity recently, in particular among the student population of the southeast of the country (in the Forró Universitário genre, with important exponents today being Falamansa, and trios such as Trio Dona Zefa, Trio Virgulino and Trio Alvorada). Moreover, the accordion is the principal instrument in Junina music (music of the São João Festival), with Mario Zan having been a very important exponent of this music. It is an important instrument in Sertanejo (and Caipira) music, which originated in the midwest and southeast of Brazil, and subsequently has gained popularity throughout the country. Colombia The accordion is also a traditional instrument in Colombia, commonly associated with the vallenato and cumbia genres. The accordion has been used by tropipop musicians such as Carlos Vives, Andrés Cabas, Fonseca (singer) and Bacilos, as well as rock musicians such as Juanes and pop musicians as Shakira. Vallenato, who emerged in the early twentieth century in Valledupar, and have come to symbolize the folk music of Colombia. Every year in April, Colombia holds one of the most important musical festivals in the country: the Vallenato Legend Festival. The festival holds contests for best accordion player. Once every decade, the "King of Kings" accordion competition takes place, where winners of the previous festivals compete for the highest possible award for a vallenato accordion player: the Pilonera Mayor prize. This is the world's largest competitive accordion festival. Czech Republic Accordion is often played at traditional Czech pubs, such as U Flekú, Prague. Mexico Norteño heavily relies on the accordion; it is a genre related to polka. Ramón Ayala, known in Mexico as the "King of the Accordion", is a norteño musician. Cumbia, which features the accordion, is also popular with musicians such as Celso Piña, creating a more contemporary style. U.S.-born Mexican musician Julieta Venegas incorporates the sound of the instrument into rock, pop and folk. She was influenced by her fellow Chicanos Los Lobos who also use the music of the accordion. North Korea According to Barbara Demick in Nothing to Envy'', the accordion is known as "the people's instrument" and all North Korean teachers were expected to learn the accordion. China The number of accordionists in China exceeds every other country in the world, and possibly every country combined. Introduced in 1926, the accordion has risen to popularity in China throughout the years, thanks to Russian teachers and its being a popular instrument in the People's Liberation Army, and remains popular. Other audio samples See also List of accordionists Steirische Harmonika Confédération internationale des accordéonistes Notes References External links Folk music instruments Articles containing video clips German inventions 19th-century inventions

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https://en.wikipedia.org/wiki/Artificial%20intelligence

Artificial intelligence

Artificial intelligence (AI) is the intelligence of machines or software, as opposed to the intelligence of humans or animals. It is also the field of study in computer science that develops and studies intelligent machines. "AI" may also refer to the machines themselves. AI technology is widely used throughout industry, government and science. Some high-profile applications are: advanced web search engines (e.g., Google Search), recommendation systems (used by YouTube, Amazon, and Netflix), understanding human speech (such as Siri and Alexa), self-driving cars (e.g., Waymo), generative or creative tools (ChatGPT and AI art), and competing at the highest level in strategic games (such as chess and Go). Artificial intelligence was founded as an academic discipline in 1956. The field went through multiple cycles of optimism followed by disappointment and loss of funding, but after 2012, when deep learning surpassed all previous AI techniques, there was a vast increase in funding and interest. The various sub-fields of AI research are centered around particular goals and the use of particular tools. The traditional goals of AI research include reasoning, knowledge representation, planning, learning, natural language processing, perception, and support for robotics. General intelligence (the ability to solve an arbitrary problem) is among the field's long-term goals. To solve these problems, AI researchers have adapted and integrated a wide range of problem-solving techniques, including search and mathematical optimization, formal logic, artificial neural networks, and methods based on statistics, operations research, and economics. AI also draws upon psychology, linguistics, philosophy, neuroscience and many other fields. Goals The general problem of simulating (or creating) intelligence has been broken down into sub-problems. These consist of particular traits or capabilities that researchers expect an intelligent system to display. The traits described below have received the most attention and cover the scope of AI research. Reasoning, problem-solving Early researchers developed algorithms that imitated step-by-step reasoning that humans use when they solve puzzles or make logical deductions. By the late 1980s and 1990s, methods were developed for dealing with uncertain or incomplete information, employing concepts from probability and economics. Many of these algorithms are insufficient for solving large reasoning problems because they experience a "combinatorial explosion": they became exponentially slower as the problems grew larger. Even humans rarely use the step-by-step deduction that early AI research could model. They solve most of their problems using fast, intuitive judgments. Accurate and efficient reasoning is an unsolved problem. Knowledge representation Knowledge representation and knowledge engineering allow AI programs to answer questions intelligently and make deductions about real-world facts. Formal knowledge representations are used in content-based indexing and retrieval, scene interpretation, clinical decision support, knowledge discovery (mining "interesting" and actionable inferences from large databases), and other areas. A knowledge base is a body of knowledge represented in a form that can be used by a program. An ontology is the set of objects, relations, concepts, and properties used by a particular domain of knowledge. Knowledge bases need to represent things such as: objects, properties, categories and relations between objects; situations, events, states and time; causes and effects; knowledge about knowledge (what we know about what other people know); default reasoning (things that humans assume are true until they are told differently and will remain true even when other facts are changing); and many other aspects and domains of knowledge. Among the most difficult problems in KR are: the breadth of commonsense knowledge (the set of atomic facts that the average person knows is enormous); and the sub-symbolic form of most commonsense knowledge (much of what people know is not represented as "facts" or "statements" that they could express verbally). Knowledge acquisition is the difficult problem of obtaining knowledge for AI applications. Modern AI gathers knowledge by "scraping" the internet (including Wikipedia). The knowledge itself was collected by the volunteers and professionals who published the information (who may or may not have agreed to provide their work to AI companies). This "crowd sourced" technique does not guarantee that the knowledge is correct or reliable. The knowledge of Large Language Models (such as ChatGPT) is highly unreliable -- it generates misinformation and falsehoods (known as "hallucinations"). Providing accurate knowledge for these modern AI applications is an unsolved problem. Planning and decision making An "agent" is anything that perceives and takes actions in the world. A rational agent has goals or preferences and takes actions to make them happen. In automated planning, the agent has a specific goal. In automated decision making, the agent has preferences – there are some situations it would prefer to be in, and some situations it is trying to avoid. The decision making agent assigns a number to each situation (called the "utility") that measures how much the agent prefers it. For each possible action, it can calculate the "expected utility": the utility of all possible outcomes of the action, weighted by the probability that the outcome will occur. It can then choose the action with the maximum expected utility. In classical planning, the agent knows exactly what the effect of any action will be. In most real-world problems, however, the agent may not be certain about the situation they are in (it is "unknown" or "unobservable") and it may not know for certain what will happen after each possible action (it is not "deterministic"). It must choose an action by making a probabilistic guess and then reassess the situation to see if the action worked. In some problems, the agent's preferences may be uncertain, especially if there are other agents or humans involved. These can be learned (e.g., with inverse reinforcement learning) or the agent can seek information to improve its preferences. Information value theory can be used to weigh the value of exploratory or experimental actions. The space of possible future actions and situations is typically intractably large, so the agents must take actions and evaluate situations while being uncertain what the outcome will be. A Markov decision process has a transition model that describes the probability that a particular action will change the state in a particular way, and a reward function that supplies the utility of each state and the cost of each action. A policy associates a decision with each possible state. The policy could be calculated (e.g. by iteration), be heuristic, or it can be learned. Game theory describes rational behavior of multiple interacting agents, and is used in AI programs that make decisions that involve other agents. Learning Machine learning is the study of programs that can improve their performance on a given task automatically. It has been a part of AI from the beginning. There are several kinds of machine learning. Unsupervised learning analyzes a stream of data and finds patterns and makes predictions without any other guidance. Supervised learning requires a human to label the input data first, and comes in two main varieties: classification (where the program must learn to predict what category the input belongs in) and regression (where the program must deduce a numeric function based on numeric input). In reinforcement learning the agent is rewarded for good responses and punished for bad ones. The agent learns to choose responses that are classified as "good". Transfer learning is when the knowledge gained from one problem is applied to a new problem. Deep learning is a type of machine learning that runs inputs through biologically inspired artificial neural networks for all of these types of learning. Computational learning theory can assess learners by computational complexity, by sample complexity (how much data is required), or by other notions of optimization. Natural language processing Natural language processing (NLP) allows programs to read, write and communicate in human languages such as English. Specific problems include speech recognition, speech synthesis, machine translation, information extraction, information retrieval and question answering. Early work, based on Noam Chomsky's generative grammar and semantic networks, had difficulty with word-sense disambiguation unless restricted to small domains called "micro-worlds" (due to the common sense knowledge problem). Modern deep learning techniques for NLP include word embedding (how often one word appears near another), transformers (which finds patterns in text), and others. In 2019, generative pre-trained transformer (or "GPT") language models began to generate coherent text, and by 2023 these models were able to get human-level scores on the bar exam, SAT, GRE, and many other real-world applications. Perception Machine perception is the ability to use input from sensors (such as cameras, microphones, wireless signals, active lidar, sonar, radar, and tactile sensors) to deduce aspects of the world. Computer vision is the ability to analyze visual input. The field includes speech recognition, image classification, facial recognition, object recognition, and robotic perception. Robotics Robotics uses AI. Social intelligence Affective computing is an interdisciplinary umbrella that comprises systems that recognize, interpret, process or simulate human feeling, emotion and mood. For example, some virtual assistants are programmed to speak conversationally or even to banter humorously; it makes them appear more sensitive to the emotional dynamics of human interaction, or to otherwise facilitate human–computer interaction. However, this tends to give naïve users an unrealistic conception of how intelligent existing computer agents actually are. Moderate successes related to affective computing include textual sentiment analysis and, more recently, multimodal sentiment analysis, wherein AI classifies the affects displayed by a videotaped subject. General intelligence A machine with artificial general intelligence should be able to solve a wide variety of problems with breadth and versatility similar to human intelligence. Tools AI research uses a wide variety of tools to accomplish the goals above. Search and optimization AI can solve many problems by intelligently searching through many possible solutions. There are two very different kinds of search used in AI: state space search and local search. State space search State space search searches through a tree of possible states to try to find a goal state. For example, Planning algorithms search through trees of goals and subgoals, attempting to find a path to a target goal, a process called means-ends analysis. Simple exhaustive searches are rarely sufficient for most real-world problems: the search space (the number of places to search) quickly grows to astronomical numbers. The result is a search that is too slow or never completes. "Heuristics" or "rules of thumb" can help to prioritize choices that are more likely to reach a goal. Adversarial search is used for game-playing programs, such as chess or Go. It searches through a tree of possible moves and counter-moves, looking for a winning position. Local search Local search uses mathematical optimization to find a numeric solution to a problem. It begins with some form of a guess and then refines the guess incrementally until no more refinements can be made. These algorithms can be visualized as blind hill climbing: we begin the search at a random point on the landscape, and then, by jumps or steps, we keep moving our guess uphill, until we reach the top. This process is called stochastic gradient descent. Evolutionary computation uses a form of optimization search. For example, they may begin with a population of organisms (the guesses) and then allow them to mutate and recombine, selecting only the fittest to survive each generation (refining the guesses). Distributed search processes can coordinate via swarm intelligence algorithms. Two popular swarm algorithms used in search are particle swarm optimization (inspired by bird flocking) and ant colony optimization (inspired by ant trails). Neural networks and statistical classifiers (discussed below), also use a form of local search, where the "landscape" to be searched is formed by learning. Logic Formal Logic is used for reasoning and knowledge representation. Formal logic comes in two main forms: propositional logic (which operates on statements that are true or false and uses logical connectives such as "and", "or", "not" and "implies") and predicate logic (which also operates on objects, predicates and relations and uses quantifiers such as "Every X is a Y" and "There are some Xs that are Ys"). Logical inference (or deduction) is the process of proving a new statement (conclusion) from other statements that are already known to be true (the premises). A logical knowledge base also handles queries and assertions as a special case of inference. An inference rule describes what is a valid step in a proof. The most general inference rule is resolution. Inference can be reduced to performing a search to find a path that leads from premises to conclusions, where each step is the application of an inference rule. Inference performed this way is intractable except for short proofs in restricted domains. No efficient, powerful and general method has been discovered. Fuzzy logic assigns a "degree of truth" between 0 and 1 and handles uncertainty and probabilistic situations. Non-monotonic logics are designed to handle default reasoning. Other specialized versions of logic have been developed to describe many complex domains (see knowledge representation above). Probabilistic methods for uncertain reasoning Many problems in AI (including in reasoning, planning, learning, perception, and robotics) require the agent to operate with incomplete or uncertain information. AI researchers have devised a number of tools to solve these problems using methods from probability theory and economics. Bayesian networks are a very general tool that can be used for many problems, including reasoning (using the Bayesian inference algorithm), learning (using the expectation-maximization algorithm), planning (using decision networks) and perception (using dynamic Bayesian networks). Probabilistic algorithms can also be used for filtering, prediction, smoothing and finding explanations for streams of data, helping perception systems to analyze processes that occur over time (e.g., hidden Markov models or Kalman filters). Precise mathematical tools have been developed that analyze how an agent can make choices and plan, using decision theory, decision analysis, and information value theory. These tools include models such as Markov decision processes, dynamic decision networks, game theory and mechanism design. Classifiers and statistical learning methods The simplest AI applications can be divided into two types: classifiers (e.g. "if shiny then diamond"), on one hand, and controllers (e.g. "if diamond then pick up"), on the other hand. Classifiers are functions that use pattern matching to determine the closest match. They can be fine-tuned based on chosen examples using supervised learning. Each pattern (also called an "observation") is labeled with a certain predefined class. All the observations combined with their class labels are known as a data set. When a new observation is received, that observation is classified based on previous experience. There are many kinds of classifiers in use. The decision tree is the simplest and most widely used symbolic machine learning algorithm. K-nearest neighbor algorithm was the most widely used analogical AI until the mid-1990s, and Kernel methods such as the support vector machine (SVM) displaced k-nearest neighbor in the 1990s. The naive Bayes classifier is reportedly the "most widely used learner" at Google, due in part to its scalability. Neural networks are also used as classifiers. Artificial neural networks Artificial neural networks were inspired by the design of the human brain: a simple "neuron" N accepts input from other neurons, each of which, when activated (or "fired"), casts a weighted "vote" for or against whether neuron N should itself activate. In practice, the input "neurons" are a list of numbers, the "weights" are a matrix, the next layer is the dot product (i.e., several weighted sums) scaled by an increasing function, such as the logistic function. "The resemblance to real neural cells and structures is superficial", according to Russell and Norvig. Learning algorithms for neural networks use local search to choose the weights that will get the right output for each input during training. The most common training technique is the backpropagation algorithm. Neural networks learn to model complex relationships between inputs and outputs and find patterns in data. In theory, a neural network can learn any function. In feedforward neural networks the signal passes in only one direction. Recurrent neural networks feed the output signal back into the input, which allows short-term memories of previous input events. Long short term memory is the most successful network architecture for recurrent networks. Perceptrons use only a single layer of neurons, deep learning uses multiple layers. Convolutional neural networks strengthen the connection between neurons that are "close" to each other – this is especially important in image processing, where a local set of neurons must identify an "edge" before the network can identify an object. Deep learning Deep learning uses several layers of neurons between the network's inputs and outputs. The multiple layers can progressively extract higher-level features from the raw input. For example, in image processing, lower layers may identify edges, while higher layers may identify the concepts relevant to a human such as digits or letters or faces. Deep learning has drastically improved the performance of programs in many important subfields of artificial intelligence, including computer vision, speech recognition, image classification and others. The reason that deep learning performs so well in so many applications is not known as of 2023. The sudden success of deep learning in 2012–2015 did not occur because of some new discovery or theoretical breakthrough (deep neural networks and backpropagation had been described by many people, as far back as the 1950s) but because of two factors: the incredible increase in computer power (including the hundred-fold increase in speed by switching to GPUs) and the availability of vast amounts of training data, especially the giant curated datasets used for benchmark testing, such as ImageNet. Specialized hardware and software In the late 2010s, graphics processing units (GPUs) that were increasingly designed with AI-specific enhancements and used with specialized TensorFlow software, had replaced previously used central processing unit (CPUs) as the dominant means for large-scale (commercial and academic) machine learning models' training. Historically, specialized languages, such as Lisp, Prolog, and others, had been used. Applications AI and machine learning technology is used in most of the essential applications of the 2020s, including: search engines (such as Google Search), targeting online advertisements, recommendation systems (offered by Netflix, YouTube or Amazon), driving internet traffic, targeted advertising (AdSense, Facebook), virtual assistants (such as Siri or Alexa), autonomous vehicles (including drones, ADAS and self-driving cars), automatic language translation (Microsoft Translator, Google Translate), facial recognition (Apple's Face ID or Microsoft's DeepFace and Google's FaceNet) and image labeling (used by Facebook, Apple's iPhoto and TikTok). There are also thousands of successful AI applications used to solve specific problems for specific industries or institutions. In a 2017 survey, one in five companies reported they had incorporated "AI" in some offerings or processes. A few examples are energy storage, medical diagnosis, military logistics, applications that predict the result of judicial decisions, foreign policy, or supply chain management. Game playing programs have been used since the 1950s to demonstrate and test AI's most advanced techniques. Deep Blue became the first computer chess-playing system to beat a reigning world chess champion, Garry Kasparov, on 11 May 1997. In 2011, in a Jeopardy! quiz show exhibition match, IBM's question answering system, Watson, defeated the two greatest Jeopardy! champions, Brad Rutter and Ken Jennings, by a significant margin. In March 2016, AlphaGo won 4 out of 5 games of Go in a match with Go champion Lee Sedol, becoming the first computer Go-playing system to beat a professional Go player without handicaps. Then it defeated Ke Jie in 2017, who at the time continuously held the world No. 1 ranking for two years. Other programs handle imperfect-information games; such as for poker at a superhuman level, Pluribus and Cepheus. DeepMind in the 2010s developed a "generalized artificial intelligence" that could learn many diverse Atari games on its own. In the early 2020s, generative AI gained widespread prominence. ChatGPT, based on GPT-3, and other large language models, were tried by 14% of Americans adults. The increasing realism and ease-of-use of AI-based text-to-image generators such as Midjourney, DALL-E, and Stable Diffusion sparked a trend of viral AI-generated photos. Widespread attention was gained by a fake photo of Pope Francis wearing a white puffer coat, the fictional arrest of Donald Trump, and a hoax of an attack on the Pentagon, as well as the usage in professional creative arts. AlphaFold 2 (2020) demonstrated the ability to approximate, in hours rather than months, the 3D structure of a protein. Ethics AI, like any powerful technology, has potential benefits and potential risks. AI may be able to advance science and find solutions for serious problems: Demis Hassabis of Deep Mind hopes to "solve intelligence, and then use that to solve everything else". However, as the use of AI has become widespread, several unintended consequences and risks have been identified. Risks and harm Privacy and copyright Machine learning algorithms require large amounts of data. The techniques used to acquire this data have raised concerns about privacy, surveillance and copyright. Technology companies collect a wide range of data from their users, including online activity, geolocation data, video and audio. For example, in order to build speech recognition algorithms, Amazon others have recorded millions of private conversations and allowed temps to listen to and transcribe some of them. Opinions about this widespread surveillance range from those who see it as a necessary evil to those for whom it is clearly unethical and a violation of the right to privacy. AI developers argue that this is the only way to deliver valuable applications. and have developed several techniques that attempt to preserve privacy while still obtaining the data, such as data aggregation, de-identification and differential privacy. Since 2016, some privacy experts, such as Cynthia Dwork, began to view privacy in terms of fairness -- Brian Christian wrote that experts have pivoted "from the question of 'what they know' to the question of 'what they're doing with it'.". Generative AI is often trained on unlicensed copyrighted works, including in domains such as images or computer code; the output is then used under a rationale of "fair use". Experts disagree about how well, and under what circumstances, this rationale will hold up in courts of law; relevant factors may include "the purpose and character of the use of the copyrighted work" and "the effect upon the potential market for the copyrighted work". In 2023, leading authors (including John Grisham and Jonathan Franzen) sued AI companies for using their work to train generative AI. Misinformation YouTube, Facebook and others use recommender systems to guide users to more content. These AI programs were given the goal of maximizing user engagement (that is, the only goal was to keep people watching). The AI learned that users tended to choose misinformation, conspiracy theories, and extreme partisan content, and, to keep them watching, the AI recommended more of it. Users also tended to watch more content on the same subject, so the AI led people into filter bubbles where they received multiple versions of the same misinformation. This convinced many users that the misinformation was true, and ultimately undermined trust in institutions, the media and the government. The AI program had correctly learned to maximize its goal, but the result was harmful to society. After the U.S. election in 2016, major technology companies took steps to mitigate the problem. In 2022, generative AI began to create images, audio, video and text that are indistinguishable from real photographs, recordings, films or human writing. It is possible for bad actors to use this technology to create massive amounts of misinformation or propaganda. This technology has been widely distributed at minimal cost. Geoffrey Hinton (who was an instrumental developer of these tools) expressed his concerns about AI disinformation. He quit his job at Google to freely criticize the companies developing AI. Algorithmic bias and fairness Machine learning applications will be biased if they learn from biased data. Anyone looking to use machine learning as part of real-world, in-production systems needs to factor ethics into their AI training processes and strive to avoid bias. This is especially true when using AI algorithms that are inherently unexplainable in deep learning. The developers may not be aware that the bias exists. Bias can be introduced by the way training data is selected and by the way a model is deployed. If a biased algorithm is used to make decisions that can seriously harm people (as it can in medicine, finance, recruitment, housing or policing) then the algorithm may cause discrimination. Fairness in machine learning is the study of how to prevent the harm caused by algorithmic bias. It has become serious area of academic study within AI. Researchers have discovered it is not always possible to define "fairness" in a way that satisfies all stakeholders. On June 28, 2015, Google Photos's new image labeling feature mistakenly identified Jacky Alcine and a friend as "gorillas" because they were black. The system was trained on a dataset that contained very few images of black people, a problem called "sample size disparity". Google "fixed" this problem by preventing the system from labelling anything as a "gorilla". Eight years later, in 2023, Google Photos still could not identify a gorilla, and neither could similar products from Apple, Facebook, Microsoft and Amazon. COMPAS is a commercial program widely used by U.S. courts to assess the likelihood of a defendant becoming a recidivist. In 2016, Julia Angwin at ProPublica discovered that COMPAS exhibited racial bias, despite the fact that the program was not told the races of the defendants. Although the error rate for both whites and blacks was calibrated equal at exactly 61%, the errors for each race were different -- the system consistently overestimated the chance that a black person would re-offend and would underestimate the chance that a white person would not re-offend. In 2017, several researchers showed that it was mathematically impossible for COMPAS to accommodate all possible measures of fairness when the base rates of re-offense were different for whites and blacks in the data. A program can make biased decisions even if the data does not explicitly mention a problematic feature (such as "race" or "gender"). The feature will correlate with other features (like "address", "shopping history" or "first name"), and the program will make the same decisions based on these features as it would on "race" or "gender". Moritz Hardt said “the most robust fact in this research area is that fairness through blindness doesn't work.” Criticism of COMPAS highlighted a deeper problem with the misuse of AI. Machine learning models are designed to make "predictions" that are only valid if we assume that the future will resemble the past. If they are trained on data that includes the results of racist decisions in the past, machine learning models must predict that racist decisions will be made in the future. Unfortunately, if an applications then uses these predictions as recommendations, some of these "recommendations" will likely be racist. Thus, machine learning is not well suited to help make decisions in areas where there is hope that the future will be better than the past. It is necessarily descriptive and not proscriptive. Bias and unfairness may go undetected because the developers are overwhelmingly white and male: among AI engineers, about 4% are black and 20% are women. At its 2022 Conference on Fairness, Accountability, and Transparency (ACM FAccT 2022) the Association for Computing Machinery, in Seoul, South Korea, presented and published findings recommending that until AI and robotics systems are demonstrated to be free of bias mistakes, they are unsafe and the use of self-learning neural networks trained on vast, unregulated sources of flawed internet data should be curtailed. Lack of transparency Most modern AI applications can not explain how they have reached a decision. The large amount of relationships between inputs and outputs in deep neural networks and resulting complexity makes it difficult for even an expert to explain how they produced their outputs, making them a black box. There have been many cases where a machine learning program passed rigorous tests, but nevertheless learned something different than what the programmers intended. For example, Justin Ko and Roberto Novoa developed a system that could identify skin diseases better than medical professionals, however it classified any image with a ruler as "cancerous", because pictures of malignancies typically include a ruler to show the scale. A more dangerous example was discovered by Rich Caruana in 2015: a machine learning system that accurately predicted risk of death classified a patient that was over 65, asthma and difficulty breathing as "low risk". Further research showed that in high-risk cases like this, the hospital would allocate more resources and save the patient's life, decreasing the risk measured by the program. Mistakes like these become obvious when we know how the program has reached a decision. Without an explanation, these problems may not not be discovered until after they have caused harm. A second issue is that people who have been harmed by an algorithm's decision have a right to an explanation. Doctors, for example, are required to clearly and completely explain the reasoning behind any decision they make. Early drafts of the European Union's General Data Protection Regulation in 2016 included an explicit statement that this right exists. Industry experts noted that this is an unsolved problem with no solution in sight. Regulators argued that nevertheless the harm is real: if the problem has no solution, the tools should not be used. DARPA established the XAI ("Explainable Artificial Intelligence") program in 2014 to try and solve these problems. There are several potential solutions to the transparency problem. Multitask learning provides a large number of outputs in addition to the target classification. These other outputs can help developers deduce what the network has learned. Deconvolution, DeepDream and other generative methods can allow developers to see what different layers of a deep network have learned and produce output that can suggest what the network is learning. Supersparse linear integer models use learning to identify the most important features, rather than the classification. Simple addition of these features can then make the classification (i.e. learning is used to create a scoring system classifier, which is transparent). Bad actors and weaponized AI A lethal autonomous weapon is a machine that locates, selects and engages human targets without human supervision. By 2015, over fifty countries were reported to be researching battlefield robots. These weapons are considered especially dangerous for several reasons: if they kill an innocent person it is not clear who should be held accountable, it is unlikely they will reliably choose targets, and, if produced at scale, they are potentially weapons of mass destruction. In 2014, 30 nations (including China) supported a ban on autonomous weapons under the United Nations' Convention on Certain Conventional Weapons, however the United States and others disagreed. AI provides a number of tools that are particularly useful for authoritarian governments: smart spyware, face recognition and voice recognition allow widespread surveillance; such surveillance allows machine learning to classify potential enemies of the state and can prevent them from hiding; recommendation systems can precisely target propaganda and misinformation for maximum effect; deepfakes and generative AI aid in producing misinformation; advanced AI can make authoritarian centralized decision making more competitive with liberal and decentralized systems such as markets. Terrorists, criminals and rogue states can use weaponized AI such as advanced digital warfare and lethal autonomous weapons. Machine-learning AI is also able to design tens of thousands of toxic molecules in a matter of hours. Technological unemployment From the early days of the development of artificial intelligence there have been arguments, for example those put forward by Weizenbaum, about whether tasks that can be done by computers actually should be done by them, given the difference between computers and humans, and between quantitative calculation and qualitative, value-based judgement. Economists have frequently highlighted the risks of redundancies from AI, and speculated about unemployment if there is no adequate social policy for full employment. In the past, technology has tended to increase rather than reduce total employment, but economists acknowledge that "we're in uncharted territory" with AI. A survey of economists showed disagreement about whether the increasing use of robots and AI will cause a substantial increase in long-term unemployment, but they generally agree that it could be a net benefit if productivity gains are redistributed. Risk estimates vary; for example, in the 2010s Michael Osborne and Carl Benedikt Frey estimated 47% of U.S. jobs are at "high risk" of potential automation, while an OECD report classified only 9% of U.S. jobs as "high risk". The methodology of speculating about future employment levels has been criticised as lacking evidential foundation, and for implying that technology (rather than social policy) creates unemployment (as opposed to redundancies). Unlike previous waves of automation, many middle-class jobs may be eliminated by artificial intelligence; The Economist stated in 2015 that "the worry that AI could do to white-collar jobs what steam power did to blue-collar ones during the Industrial Revolution" is "worth taking seriously". Jobs at extreme risk range from paralegals to fast food cooks, while job demand is likely to increase for care-related professions ranging from personal healthcare to the clergy. In April 2023, it was reported that 70% of the jobs for Chinese video game illlustrators had been eliminated by generative artificial intelligence. Existential risk It has been argued AI will become so powerful that humanity may irreversibly lose control of it. This could, as the physicist Stephen Hawking puts it, "spell the end of the human race". This scenario has been common in science fiction, when a computer or robot suddenly develops a human-like "self-awareness" (or "sentience" or "consciousness") and becomes a malevolent character. These sci-fi scenarios are misleading in several ways. First, AI does not require human-like "sentience" to be an existential risk. Modern AI programs are given specific goals and use learning and intelligence to achieve them. Philosopher Nick Bostrom argued that if one gives almost any goal to a sufficiently powerful AI, it may choose to destroy humanity to achieve it (he used the example of a paperclip factory manager). Stuart Russell gives the example of household robot that tries to find a way to kill its owner to prevent it from being unplugged, reasoning that "you can't fetch the coffee if you're dead." In order to be safe for humanity, a superintelligence would have to be genuinely aligned with humanity's morality and values so that it is "fundamentally on our side". Second, Yuval Noah Harari argues that AI does not require a robot body or physical control to pose an existential risk. The essential parts of civilization are not physical. Things like ideologies, law, government, money and the economy are made of language; they exist because there are stories that billions of people believe. The current prevalence of misinformation suggests that an AI could use language to convince people to believe anything, even to take actions that are destructive. The opinions amongst experts and industry insiders are mixed, with sizable fractions both concerned and unconcerned by risk from eventual superintelligent AI. Personalities such as Stephen Hawking, Bill Gates, Elon Musk have expressed concern about existential risk from AI. In the early 2010's, experts argued that the risks are too distant in the future to warrant research or that humans will be valuable from the perspective of a superintelligent machine. However, after 2016, the study of current and future risks and possible solutions became a serious area of research. In 2023, AI pioneers including Geoffrey Hinton, Yoshua Bengio, Demis Hassabis, and Sam Altman issued the joint statement that "Mitigating the risk of extinction from AI should be a global priority alongside other societal-scale risks such as pandemics and nuclear war". Ethical machines and alignment Friendly AI are machines that have been designed from the beginning to minimize risks and to make choices that benefit humans. Eliezer Yudkowsky, who coined the term, argues that developing friendly AI should be a higher research priority: it may require a large investment and it must be completed before AI becomes an existential risk. Machines with intelligence have the potential to use their intelligence to make ethical decisions. The field of machine ethics provides machines with ethical principles and procedures for resolving ethical dilemmas. The field of machine ethics is also called computational morality, and was founded at an AAAI symposium in 2005. Other approaches include Wendell Wallach's "artificial moral agents" and Stuart J. Russell's three principles for developing provably beneficial machines. Regulation The regulation of artificial intelligence is the development of public sector policies and laws for promoting and regulating artificial intelligence (AI); it is therefore related to the broader regulation of algorithms. The regulatory and policy landscape for AI is an emerging issue in jurisdictions globally. According to AI Index at Stanford, the annual number of AI-related laws passed in the 127 survey countries jumped from one passed in 2016 to 37 passed in 2022 alone. Between 2016 and 2020, more than 30 countries adopted dedicated strategies for AI. Most EU member states had released national AI strategies, as had Canada, China, India, Japan, Mauritius, the Russian Federation, Saudi Arabia, United Arab Emirates, US and Vietnam. Others were in the process of elaborating their own AI strategy, including Bangladesh, Malaysia and Tunisia. The Global Partnership on Artificial Intelligence was launched in June 2020, stating a need for AI to be developed in accordance with human rights and democratic values, to ensure public confidence and trust in the technology. Henry Kissinger, Eric Schmidt, and Daniel Huttenlocher published a joint statement in November 2021 calling for a government commission to regulate AI. In 2023, OpenAI leaders published recommendations for the governance of superintelligence, which they believe may happen in less than 10 years. In a 2022 Ipsos survey, attitudes towards AI varied greatly by country; 78% of Chinese citizens, but only 35% of Americans, agreed that "products and services using AI have more benefits than drawbacks". A 2023 Reuters/Ipsos poll found that 61% of Americans agree, and 22% disagree, that AI poses risks to humanity. In a 2023 Fox News poll, 35% of Americans thought it "very important", and an additional 41% thought it "somewhat important", for the federal government to regulate AI, versus 13% responding "not very important" and 8% responding "not at all important". History The study of mechanical or "formal" reasoning began with philosophers and mathematicians in antiquity. The study of logic led directly to Alan Turing's theory of computation, which suggested that a machine, by shuffling symbols as simple as "0" and "1", could simulate both mathematical deduction and formal reasoning, which is known as the Church–Turing thesis. This, along with concurrent discoveries in cybernetics and information theory, led researchers to consider the possibility of building an "electronic brain". The first paper later recognized as "AI" was McCullouch and Pitts design for Turing-complete "artificial neurons" in 1943. The field of AI research was founded at a workshop at Dartmouth College in 1956. The attendees became the leaders of AI research in the 1960s. They and their students produced programs that the press described as "astonishing": computers were learning checkers strategies, solving word problems in algebra, proving logical theorems and speaking English. By the middle of the 1960s, research in the U.S. was heavily funded by the Department of Defense and laboratories had been established around the world. Herbert Simon predicted, "machines will be capable, within twenty years, of doing any work a man can do". Marvin Minsky agreed, writing, "within a generation ... the problem of creating 'artificial intelligence' will substantially be solved". They had, however, underestimated the difficulty of the problem. Both the U.S. and British governments cut off exploratory research in response to the criticism of Sir James Lighthill and ongoing pressure from the US Congress to fund more productive projects. Minsky's and Papert's book Perceptrons was understood as proving that artificial neural networks approach would never be useful for solving real-world tasks, thus discrediting the approach altogether. The "AI winter", a period when obtaining funding for AI projects was difficult, followed. In the early 1980s, AI research was revived by the commercial success of expert systems, a form of AI program that simulated the knowledge and analytical skills of human experts. By 1985, the market for AI had reached over a billion dollars. At the same time, Japan's fifth generation computer project inspired the U.S. and British governments to restore funding for academic research. However, beginning with the collapse of the Lisp Machine market in 1987, AI once again fell into disrepute, and a second, longer-lasting winter began. Many researchers began to doubt that the current practices would be able to imitate all the processes of human cognition, especially perception, robotics, learning and pattern recognition. A number of researchers began to look into "sub-symbolic" approaches. Robotics researchers, such as Rodney Brooks, rejected "representation" in general and focussed directly on engineering machines that move and survive.. Judea Pearl, Lofti Zadeh and others developed methods that handled incomplete and uncertain information by making reasonable guesses rather than precise logic. But the most important development was the revival of "connectionism", including neural network research, by Geoffrey Hinton and others. In 1990, Yann LeCun successfully showed that convolutional neural networks can recognize handwritten digits, the first of many successful applications of neural networks. AI gradually restored its reputation in the late 1990s and early 21st century by exploiting formal mathematical methods and by finding specific solutions to specific problems. This "narrow" and "formal" focus allowed researchers to produce verifiable results and collaborate with other fields (such as statistics, economics and mathematics). By 2000, solutions developed by AI researchers were being widely used, although in the 1990s they were rarely described as "artificial intelligence". Several academic researchers became concerned that AI was no longer pursuing the original goal of creating versatile, fully intelligent machines. Beginning around 2002, they founded the subfield of artificial general intelligence (or "AGI"), which had several well-funded institutions by the 2010s. Deep learning began to dominate industry benchmarks in 2012 and was adopted throughout the field. For many specific tasks, other methods were abandoned. Deep learning's success was based on both hardware improvements (faster computers, graphics processing units, cloud computing) and access to large amounts of data (including curated datasets, such as ImageNet). Deep learning's success led to an enormous increase in interest and funding in AI. The amount of machine learning research (measured by total publications) increased by 50% in the years 2015–2019, and WIPO reported that AI was the most prolific emerging technology in terms of the number of patent applications and granted patents According to 'AI Impacts', about $50 billion annually was invested in "AI" around 2022 in the US alone and about 20% of new US Computer Science PhD graduates have specialized in "AI"; about 800,000 "AI"-related US job openings existed in 2022. In 2016, issues of fairness and the misuse of technology were catapulted into center stage at machine learning conferences, publications vastly increased, funding became available, and many researchers re-focussed their careers on these issues. The alignment problem became a serious field of academic study. Philosophy Defining artificial intelligence Alan Turing wrote in 1950 "I propose to consider the question 'can machines think'?" He advised changing the question from whether a machine "thinks", to "whether or not it is possible for machinery to show intelligent behaviour". He devised the Turing test, which measures the ability of a machine to simulate human conversation. Since we can only observe the behavior of the machine, it does not matter if it is "actually" thinking or literally has a "mind". Turing notes that we can not determine these things about other people but "it is usual to have a polite convention that everyone thinks" Russell and Norvig agree with Turing that AI must be defined in terms of "acting" and not "thinking". However, they are critical that the test compares machines to people. "Aeronautical engineering texts," they wrote, "do not define the goal of their field as making 'machines that fly so exactly like pigeons that they can fool other pigeons. AI founder John McCarthy agreed, writing that "Artificial intelligence is not, by definition, simulation of human intelligence". McCarthy defines intelligence as "the computational part of the ability to achieve goals in the world." Another AI founder, Marvin Minsky similarly defines it as "the ability to solve hard problems". These definitions view intelligence in terms of well-defined problems with well-defined solutions, where both the difficulty of the problem and the performance of the program are direct measures of the "intelligence" of the machine—and no other philosophical discussion is required, or may not even be possible. Another definition has been adopted by Google, a major practitioner in the field of AI. This definition stipulates the ability of systems to synthesize information as the manifestation of intelligence, similar to the way it is defined in biological intelligence. Evaluating approaches to AI No established unifying theory or paradigm has guided AI research for most of its history. The unprecedented success of statistical machine learning in the 2010s eclipsed all other approaches (so much so that some sources, especially in the business world, use the term "artificial intelligence" to mean "machine learning with neural networks"). This approach is mostly sub-symbolic, soft and narrow (see below). Critics argue that these questions may have to be revisited by future generations of AI researchers. Symbolic AI and its limits Symbolic AI (or "GOFAI") simulated the high-level conscious reasoning that people use when they solve puzzles, express legal reasoning and do mathematics. They were highly successful at "intelligent" tasks such as algebra or IQ tests. In the 1960s, Newell and Simon proposed the physical symbol systems hypothesis: "A physical symbol system has the necessary and sufficient means of general intelligent action." However, the symbolic approach failed on many tasks that humans solve easily, such as learning, recognizing an object or commonsense reasoning. Moravec's paradox is the discovery that high-level "intelligent" tasks were easy for AI, but low level "instinctive" tasks were extremely difficult. Philosopher Hubert Dreyfus had argued since the 1960s that human expertise depends on unconscious instinct rather than conscious symbol manipulation, and on having a "feel" for the situation, rather than explicit symbolic knowledge. Although his arguments had been ridiculed and ignored when they were first presented, eventually, AI research came to agree. The issue is not resolved: sub-symbolic reasoning can make many of the same inscrutable mistakes that human intuition does, such as algorithmic bias. Critics such as Noam Chomsky argue continuing research into symbolic AI will still be necessary to attain general intelligence, in part because sub-symbolic AI is a move away from explainable AI: it can be difficult or impossible to understand why a modern statistical AI program made a particular decision. The emerging field of neuro-symbolic artificial intelligence attempts to bridge the two approaches. Neat vs. scruffy "Neats" hope that intelligent behavior is described using simple, elegant principles (such as logic, optimization, or neural networks). "Scruffies" expect that it necessarily requires solving a large number of unrelated problems. Neats defend their programs with theoretical rigor, scruffies rely mainly on incremental testing to see if they work. This issue was actively discussed in the 70s and 80s, but eventually was seen as irrelevant. Modern AI has elements of both. Soft vs. hard computing Finding a provably correct or optimal solution is intractable for many important problems. Soft computing is a set of techniques, including genetic algorithms, fuzzy logic and neural networks, that are tolerant of imprecision, uncertainty, partial truth and approximation. Soft computing was introduced in the late 80s and most successful AI programs in the 21st century are examples of soft computing with neural networks. Narrow vs. general AI AI researchers are divided as to whether to pursue the goals of artificial general intelligence and superintelligence directly or to solve as many specific problems as possible (narrow AI) in hopes these solutions will lead indirectly to the field's long-term goals. General intelligence is difficult to define and difficult to measure, and modern AI has had more verifiable successes by focusing on specific problems with specific solutions. The experimental sub-field of artificial general intelligence studies this area exclusively. Machine consciousness, sentience and mind The philosophy of mind does not know whether a machine can have a mind, consciousness and mental states, in the same sense that human beings do. This issue considers the internal experiences of the machine, rather than its external behavior. Mainstream AI research considers this issue irrelevant because it does not affect the goals of the field: to build machines that can solve problems using intelligence. Russell and Norvig add that "[t]he additional project of making a machine conscious in exactly the way humans are is not one that we are equipped to take on." However, the question has become central to the philosophy of mind. It is also typically the central question at issue in artificial intelligence in fiction. Consciousness David Chalmers identified two problems in understanding the mind, which he named the "hard" and "easy" problems of consciousness. The easy problem is understanding how the brain processes signals, makes plans and controls behavior. The hard problem is explaining how this feels or why it should feel like anything at all, assuming we are right in thinking that it truly does feel like something (Dennett's consciousness illusionism says this is an illusion). Human information processing is easy to explain, however, human subjective experience is difficult to explain. For example, it is easy to imagine a color-blind person who has learned to identify which objects in their field of view are red, but it is not clear what would be required for the person to know what red looks like. Computationalism and functionalism Computationalism is the position in the philosophy of mind that the human mind is an information processing system and that thinking is a form of computing. Computationalism argues that the relationship between mind and body is similar or identical to the relationship between software and hardware and thus may be a solution to the mind–body problem. This philosophical position was inspired by the work of AI researchers and cognitive scientists in the 1960s and was originally proposed by philosophers Jerry Fodor and Hilary Putnam. Philosopher John Searle characterized this position as "strong AI": "The appropriately programmed computer with the right inputs and outputs would thereby have a mind in exactly the same sense human beings have minds." Searle counters this assertion with his Chinese room argument, which attempts to show that, even if a machine perfectly simulates human behavior, there is still no reason to suppose it also has a mind. Robot rights If a machine has a mind and subjective experience, then it may also have sentience (the ability to feel), and if so it could also suffer; it has been argued that this could entitle it to certain rights. Any hypothetical robot rights would lie on a spectrum with animal rights and human rights. This issue has been considered in fiction for centuries, and is now being considered by, for example, California's Institute for the Future; however, critics argue that the discussion is premature. Future Superintelligence and the singularity A superintelligence is a hypothetical agent that would possess intelligence far surpassing that of the brightest and most gifted human mind. If research into artificial general intelligence produced sufficiently intelligent software, it might be able to reprogram and improve itself. The improved software would be even better at improving itself, leading to what I. J. Good called an "intelligence explosion" and Vernor Vinge called a "singularity". However, most technologies do not improve exponentially indefinitely, but rather follow an S-curve, slowing when they reach the physical limits of what the technology can do. Consider, for example, transportation: speed increased exponentially from 1830 to 1970, but then the trend abruptly stopped when it reached physical limits. Transhumanism Robot designer Hans Moravec, cyberneticist Kevin Warwick, and inventor Ray Kurzweil have predicted that humans and machines will merge in the future into cyborgs that are more capable and powerful than either. This idea, called transhumanism, has roots in Aldous Huxley and Robert Ettinger. Edward Fredkin argues that "artificial intelligence is the next stage in evolution", an idea first proposed by Samuel Butler's "Darwin among the Machines" as far back as 1863, and expanded upon by George Dyson in his book of the same name in 1998. In fiction Thought-capable artificial beings have appeared as storytelling devices since antiquity, and have been a persistent theme in science fiction. A common trope in these works began with Mary Shelley's Frankenstein, where a human creation becomes a threat to its masters. This includes such works as Arthur C. Clarke's and Stanley Kubrick's 2001: A Space Odyssey (both 1968), with HAL 9000, the murderous computer in charge of the Discovery One spaceship, as well as The Terminator (1984) and The Matrix (1999). In contrast, the rare loyal robots such as Gort from The Day the Earth Stood Still (1951) and Bishop from Aliens (1986) are less prominent in popular culture. Isaac Asimov introduced the Three Laws of Robotics in many books and stories, most notably the "Multivac" series about a super-intelligent computer of the same name. Asimov's laws are often brought up during lay discussions of machine ethics; while almost all artificial intelligence researchers are familiar with Asimov's laws through popular culture, they generally consider the laws useless for many reasons, one of which is their ambiguity. Several works use AI to force us to confront the fundamental question of what makes us human, showing us artificial beings that have the ability to feel, and thus to suffer. This appears in Karel Čapek's R.U.R., the films A.I. Artificial Intelligence and Ex Machina, as well as the novel Do Androids Dream of Electric Sheep?, by Philip K. Dick. Dick considers the idea that our understanding of human subjectivity is altered by technology created with artificial intelligence. See also Explanatory notes References AI textbooks The two most widely used textbooks in 2023. (See the Open Syllabus). These were the four the most widely used AI textbooks in 2008: . Later editions. History of AI . . Other sources was introduced by Kunihiko Fukushima in 1980. | . Presidential Address to the Association for the Advancement of Artificial Intelligence. Later published as . AI & ML in Fusion AI & ML in Fusion, video lecture Further reading Autor, David H., "Why Are There Still So Many Jobs? The History and Future of Workplace Automation" (2015) 29(3) Journal of Economic Perspectives 3. Boden, Margaret, Mind As Machine, Oxford University Press, 2006. Cukier, Kenneth, "Ready for Robots? How to Think about the Future of AI", Foreign Affairs, vol. 98, no. 4 (July/August 2019), pp. 192–98. George Dyson, historian of computing, writes (in what might be called "Dyson's Law") that "Any system simple enough to be understandable will not be complicated enough to behave intelligently, while any system complicated enough to behave intelligently will be too complicated to understand." (p. 197.) Computer scientist Alex Pentland writes: "Current AI machine-learning algorithms are, at their core, dead simple stupid. They work, but they work by brute force." (p. 198.) Domingos, Pedro, "Our Digital Doubles: AI will serve our species, not control it", Scientific American, vol. 319, no. 3 (September 2018), pp. 88–93. Gertner, Jon. (2023) "Wikipedia's Moment of Truth: Can the online encyclopedia help teach A.I. chatbots to get their facts right — without destroying itself in the process?" New York Times Magazine (July 18, 2023) online Hughes-Castleberry, Kenna, "A Murder Mystery Puzzle: The literary puzzle Cain's Jawbone, which has stumped humans for decades, reveals the limitations of natural-language-processing algorithms", Scientific American, vol. 329, no. 4 (November 2023), pp. 81–82. "This murder mystery competition has revealed that although NLP (natural-language processing) models are capable of incredible feats, their abilities are very much limited by the amount of context they receive. This [...] could cause [difficulties] for researchers who hope to use them to do things such as analyze ancient languages. In some cases, there are few historical records on long-gone civilizations to serve as training data for such a purpose." (p. 82.) Johnston, John (2008) The Allure of Machinic Life: Cybernetics, Artificial Life, and the New AI, MIT Press. Gary Marcus, "Artificial Confidence: Even the newest, buzziest systems of artificial general intelligence are stymmied by the same old problems", Scientific American, vol. 327, no. 4 (October 2022), pp. 42–45. Introduced DQN, which produced human-level performance on some Atari games. Eka Roivainen, "AI's IQ: ChatGPT aced a [standard intelligence] test but showed that intelligence cannot be measured by IQ alone", Scientific American, vol. 329, no. 1 (July/August 2023), p. 7. "Despite its high IQ, ChatGPT fails at tasks that require real humanlike reasoning or an understanding of the physical and social world.... ChatGPT seemed unable to reason logically and tried to rely on its vast database of... facts derived from online texts." Ashish Vaswani, Noam Shazeer, Niki Parmar et al. "Attention is all you need." Advances in neural information processing systems 30 (2017). Seminal paper on transformers. External links Artificial Intelligence. BBC Radio 4 discussion with John Agar, Alison Adam & Igor Aleksander (In Our Time, 8 December 2005). Theranostics and AI—The Next Advance in Cancer Precision Medicine Artificial intelligence Cybernetics Computational neuroscience Computational fields of study Data science Emerging technologies Formal sciences Intelligence by type Unsolved problems in computer science

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https://en.wikipedia.org/wiki/Afro%20Celt%20Sound%20System

Afro Celt Sound System

Afro Celt Sound System are a European and African group who fuse electronic music with traditional Gaelic and West African music. Afro Celt Sound System were formed in 1995 by producer-guitarist Simon Emmerson, and feature a wide range of guest artists. In 2003, they temporarily changed their name to Afrocelts before reverting to their original name. Their albums have been released through Peter Gabriel's Real World Records, and they have frequently performed at WOMAD festivals worldwide. Their sales on the label are exceeded only by Gabriel himself. Their recording contract with Real World was for five albums, of which Volume 5: Anatomic was the last. After a number of festival dates in 2007, the band went on hiatus. In 2010, they regrouped to play a number of shows (including a return to WOMAD), releasing a re-mastered retrospective titled Capture. On 20 May 2014, Afro Celt Sound System announced the release of the album Born. In January 2016, a posting to that website revealed that due to a dispute with Emmerson, who announced his departure from the band in 2015, there were two active versions of the band, a version led by Emmerson and a separate line-up headed by James McNally and Martin Russell. Emmerson's version of the band released the album The Source in 2016. The dispute ended on 21 December 2016, with an announcement on social media. The band released their seventh studio album, Flight, on 23 November 2018. Formation The inspiration behind the project dates back to 1991, when Simon Emmerson, a Grammy Award-nominated British producer and guitarist, collaborated with Afro-pop star Baaba Maal. While making an album with Maal in Senegal, Emmerson was struck by the similarity between one African melody and a traditional Irish air. Back in London, Irish musician Davy Spillane told Emmerson about a belief that nomadic Celts lived in Africa or India before they migrated to Western Europe. Whether or not the theory was true, Emmerson was intrigued by the two regions' musical affinities. In an experiment that would prove successful, Emmerson brought two members of Baaba Maal's band together with traditional Irish musicians to see what kind of music the two groups would create. Adding a dash of modern sound, Emmerson also brought in English dance mixers for an electronic beat. "People thought I was mad when I touted the idea," Emmerson told Jim Carroll of The Irish Times. "At the time, I was out of favour with the London club scene. I was broke and on income support but the success was extraordinary". Career Jamming in the studios at Real World, musician Peter Gabriel's recording facilities in Wiltshire, England, the group of musicians recorded the basis of their first album in one week. This album, Volume 1: Sound Magic, was released by Real World Records in 1996, and marked the debut of the Afro Celt Sound System. "Prior to that first album being made, none of us knew if it would work," musician James McNally told Larry Katz of the Boston Herald. "We were strangers who didn't even speak the same language. But we were bowled over by this communication that took place beyond language." McNally, who grew up second-generation Irish in London, played whistles, keyboards, piano, bodhran, and bamboo flute. Sound Magic has now sold over 300,000 copies. The band performed at festivals, raves, and dance clubs and regularly included two African musicians, Moussa Sissokho on talking drum and djembe and N'Faly Kouyate on vocals, kora and balafon. Just as the second album was getting off the ground, one of the group's core musicians, 27-year-old keyboardist Jo Bruce, (son of Cream bass player Jack Bruce), died suddenly of an asthma attack. The band was devastated, and the album was put on hold. Sinéad O'Connor then collaborated with the band and helped them cope with their loss. "[O'Connor] blew into the studio on a windy November night and blew away again leaving us something incredibly emotional and powerful," McNally told Katz. "We had this track we didn't know what to do with. Sinéad scribbled a few lyrics and bang! She left us completely choked up." The band used the name of O'Connor's song, "Release", for the title of their album. Volume 2: Release was released in 1999, and by the spring of 2000 it had sold more than half a million copies worldwide. Release is also used as one of the GCSE music set works in the UK that students are required to study for their exam. In 2000, the group was nominated for a Grammy Award in the Best World Music category. The band, composed at the time of eight members from six countries (the UK, Senegal, Guinea, Ireland, France and Kenya), took pride in its ability to bring people together through music. "We can communicate anywhere at any corner of the planet and feel that we're at home," McNally told Patrick MacDonald of The Seattle Times. "We're breaking down categories of world music and rock music and black music. We leave a door open to communicate with each other's traditions. And it's changed our lives". In 2001, the group released Volume 3: Further in Time, which climbed to number one on Billboards Top World Music Albums chart. Featuring guest spots by Peter Gabriel and Robert Plant, the album also incorporated a heightened African sound. "On the first two records, the pendulum swung more toward the Celtic, London club side of the equation," Emmerson told The Irish Times Carroll. "For this one, we wanted to have more African vocals and input than we'd done before." Again the Afro Celt Sound System met with success. Chuck Taylor of Billboard praised the album as "a cultural phenomenon that bursts past the traditional boundaries of contemporary music." The single "When You're Falling", with vocals by Gabriel, became a radio hit in the United States. In 2003, for the Seed album, they changed their name to Afrocelts. They reverted to the longer band name for their subsequent albums, Pod, a compilation of new mixes of songs from the first four albums, Volume 5: Anatomic (their fifth studio album), and Capture (1995–2010). They played a number of shows to promote Volume 5: Anatomic in 2006 and summer 2007, ending with a gig in Korea, before taking an extended break to work on side projects, amongst them The Imagined Village featuring Simon Emmerson and Johnny Kalsi. Starting in the summer of 2010, the band performed a series of live shows to promote Capture (1995–2010), released on 6 September 2010 on Real World Records. Further performances continue to the present day, and a new album-in-progress titled Born was announced on their website in 2014. Following the split (see below), Emmerson's version of the band released the album The Source in 2016. Split During 2015, the band had split into two formations, one of them including Simon Emmerson, N'Faly Kouyate and Johnny Kalsi, the other one James McNally and Martin Russell. The split was announced on the band's website in January 2016. The dispute officially ended with an announcement on social media on 21 December 2016. Members When Afro Celt Sound System formed in the mid-1990s during the Real World Recording Week, the difference between a guest artist and a band member was virtually non-existent. However, over time, a combination of people became most often associated with the name Afro Celt Sound System (while Volume 5: Anatomic only lists Emmerson, McNally, Ó Lionáird and Russell as regulars). The divided grouping of the band into two versions, both operating under the name Afro Celt Sound System, began in January 2016 and was resolved in December 2016 after McNally and Russell agreed to work under a different name from Emmerson. Simon Emmerson who died on 13 March 2023 after falling ill. N'Faly Kouyate Johnny Kalsi Moussa Sissokho Griogair Labhruidh Ronan Browne Emer Mayock Davy Spillane Russell/McNally version Martin Russell James McNally Ian Markin Tim Bradshaw Babara Bangoura Dorothee Munyaneza Kadially Kouyaté Dav Daheley Other musicians who have performed or recorded with Afro Celt Sound System include: Jimmy Mahon, Demba Barry, Babara Bangoura, Iarla Ó Lionáird, Peter Gabriel, Robert Plant, Pete Lockett, Sinéad O'Connor, Pina Kollar, Dorothee Munyaneza, Sevara Nazarkhan, Simon Massey, Jesse Cook, Martin Hayes, Eileen Ivers, Mundy, Mairéad Ní Mhaonaigh and Ciarán Tourish of Altan, Ronan Browne, Michael McGoldrick, Myrdhin, Shooglenifty, Mairead Nesbitt, Nigel Eaton, Davy Spillane, Jonas Bruce, Heather Nova, Julie Murphy and Ayub Ogada, Caroline Lavelle, Ross Ainslie. Discography Studio albums Other albums Pod (remix album) (2004) Capture (1995–2010) (2010) (compilation) No. 14 NZ They also recorded the soundtrack for the PC game Magic and Mayhem, released in 1998. Charted singles References External links Real World Records page Celtic fusion groups Worldbeat groups Real World Records artists British world music groups Musical groups established in 1995

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https://en.wikipedia.org/wiki/Anaximander

Anaximander

Anaximander ( ; Anaximandros; ) was a pre-Socratic Greek philosopher who lived in Miletus, a city of Ionia (in modern-day Turkey). He belonged to the Milesian school and learned the teachings of his master Thales. He succeeded Thales and became the second master of that school where he counted Anaximenes and, arguably, Pythagoras amongst his pupils. Little of his life and work is known today. According to available historical documents, he is the first philosopher known to have written down his studies, although only one fragment of his work remains. Fragmentary testimonies found in documents after his death provide a portrait of the man. Anaximander was an early proponent of science and tried to observe and explain different aspects of the universe, with a particular interest in its origins, claiming that nature is ruled by laws, just like human societies, and anything that disturbs the balance of nature does not last long. Like many thinkers of his time, Anaximander's philosophy included contributions to many disciplines. In astronomy, he attempted to describe the mechanics of celestial bodies in relation to the Earth. In physics, his postulation that the indefinite (or apeiron) was the source of all things led Greek philosophy to a new level of conceptual abstraction. His knowledge of geometry allowed him to introduce the gnomon in Greece. He created a map of the world that contributed greatly to the advancement of geography. He was also involved in the politics of Miletus and was sent as a leader to one of its colonies. Biography Anaximander, son of Praxiades, was born in the third year of the 42nd Olympiad (610 BC). According to Apollodorus of Athens, Greek grammarian of the 2nd century BC, he was sixty-four years old during the second year of the 58th Olympiad (547–546 BC), and died shortly afterwards. Establishing a timeline of his work is now impossible, since no document provides chronological references. Themistius, a 4th-century Byzantine rhetorician, mentions that he was the "first of the known Greeks to publish a written document on nature." Therefore, his texts would be amongst the earliest written in prose, at least in the Western world. By the time of Plato, his philosophy was almost forgotten, and Aristotle, his successor Theophrastus and a few doxographers provide us with the little information that remains. However, we know from Aristotle that Thales, also from Miletus, precedes Anaximander. It is debatable whether Thales actually was the teacher of Anaximander, but there is no doubt that Anaximander was influenced by Thales' theory that everything is derived from water. One thing that is not debatable is that even the ancient Greeks considered Anaximander to be from the Monist school which began in Miletus, with Thales followed by Anaximander and which ended with Anaximenes. 3rd-century Roman rhetorician Aelian depicts Anaximander as leader of the Milesian colony to Apollonia on the Black Sea coast, and hence some have inferred that he was a prominent citizen. Indeed, Various History (III, 17) explains that philosophers sometimes also dealt with political matters. It is very likely that leaders of Miletus sent him there as a legislator to create a constitution or simply to maintain the colony's allegiance. Anaximander lived the final few years of his life as a subject of the Persian Achaemenid Empire. Theories Anaximander's theories were influenced by the Greek mythical tradition, and by some ideas of Thales – the father of Western philosophy – as well as by observations made by older civilizations in the Near East, especially Babylon. All these were developed rationally. In his desire to find some universal principle, he assumed, like traditional religion, the existence of a cosmic order; and his ideas on this used the old language of myths which ascribed divine control to various spheres of reality. This was a common practice for the Greek philosophers in a society which saw gods everywhere, and therefore could fit their ideas into a tolerably elastic system. Some scholars see a gap between the existing mythical and the new rational way of thought which is the main characteristic of the archaic period (8th to 6th century BC) in the Greek city-states. This has given rise to the phrase "Greek miracle". But there may not have been such an abrupt break as initially appears. The basic elements of nature (water, air, fire, earth) which the first Greek philosophers believed made up the universe in fact represent the primordial forces imagined in earlier ways of thinking. Their collision produced what the mythical tradition had called cosmic harmony. In the old cosmogonies – Hesiod (8th – 7th century BC) and Pherecydes (6th century BC) – Zeus establishes his order in the world by destroying the powers which were threatening this harmony (the Titans). Anaximander claimed that the cosmic order is not monarchic but geometric, and that this causes the equilibrium of the earth, which is lying in the centre of the universe. This is the projection on nature of a new political order and a new space organized around a centre which is the static point of the system in the society as in nature. In this space there is isonomy (equal rights) and all the forces are symmetrical and transferable. The decisions are now taken by the assembly of demos in the agora which is lying in the middle of the city. The same rational way of thought led him to introduce the abstract apeiron (indefinite, infinite, boundless, unlimited) as an origin of the universe, a concept that is probably influenced by the original Chaos (gaping void, abyss, formless state) from which everything else appeared in the mythical Greek cosmogony. It also takes notice of the mutual changes between the four elements. Origin, then, must be something else unlimited in its source, that could create without experiencing decay, so that genesis would never stop. Apeiron The Refutation attributed to Hippolytus of Rome (I, 5), and the later 6th century Byzantine philosopher Simplicius of Cilicia, attribute to Anaximander the earliest use of the word apeiron ( "infinite" or "limitless") to designate the original principle. He was the first philosopher to employ, in a philosophical context, the term archē (), which until then had meant beginning or origin. "That Anaximander called this something by the name of is the natural interpretation of what Theophrastos says; the current statement that the term was introduced by him appears to be due to a misunderstanding." And "Hippolytos, however, is not an independent authority, and the only question is what Theophrastos wrote." For him, it became no longer a mere point in time, but a source that could perpetually give birth to whatever will be. The indefiniteness is spatial in early usages as in Homer (indefinite sea) and as in Xenophanes (6th century BC) who said that the earth went down indefinitely (to apeiron) i.e. beyond the imagination or concept of men. Burnet (1930) in Early Greek Philosophy says: "Nearly all we know of Anaximander's system is derived in the last resort from Theophrastos, who certainly knew his book. He seems once at least to have quoted Anaximander's own words, and he criticised his style. Here are the remains of what he said of him in the First Book: "Anaximander of Miletos, son of Praxiades, a fellow-citizen and associate of Thales, said that the material cause and first element of things was the Infinite, he being the first to introduce this name of the material cause. He says it is neither water nor any other of the so-called elements, but a substance different from them which is infinite" [apeiron, or ] "from which arise all the heavens and the worlds within them.—Phys, Op. fr. 2 (Dox. p. 476; R. P. 16)." Burnet's quote from the "First Book" is his translation of Theophrastos' Physic Opinion fragment 2 as it appears in p. 476 of Historia Philosophiae Graecae (1898) by Ritter and Preller and section 16 of Doxographi Graeci (1879) by Diels. By ascribing the "Infinite" with a "material cause", Theophrastos is following the Aristotelian tradition of "nearly always discussing the facts from the point of view of his own system". Aristotle writes (Metaphysics, I.III 3–4) that the Pre-Socratics were searching for the element that constitutes all things. While each pre-Socratic philosopher gave a different answer as to the identity of this element (water for Thales and air for Anaximenes), Anaximander understood the beginning or first principle to be an endless, unlimited primordial mass (apeiron), subject to neither old age nor decay, that perpetually yielded fresh materials from which everything we perceive is derived. He proposed the theory of the apeiron in direct response to the earlier theory of his teacher, Thales, who had claimed that the primary substance was water. The notion of temporal infinity was familiar to the Greek mind from remote antiquity in the religious concept of immortality, and Anaximander's description was in terms appropriate to this conception. This archē is called "eternal and ageless". (Hippolytus (?), Refutation, I,6,I;DK B2) "Aristotle puts things in his own way regardless of historical considerations, and it is difficult to see that it is more of an anachronism to call the Boundless " intermediate between the elements " than to say that it is " distinct from the elements." Indeed, if once we introduce the elements at all, the former description is the more adequate of the two. At any rate, if we refuse to understand these passages as referring to Anaximander, we shall have to say that Aristotle paid a great deal of attention to some one whose very name has been lost, and who not only agreed with some of Anaximander's views, but also used some of his most characteristic expressions. We may add that in one or two places Aristotle certainly seems to identify the " intermediate " with the something " distinct from " the elements." "It is certain that he [Anaximander] cannot have said anything about elements, which no one thought of before Empedokles, and no one could think of before Parmenides. The question has only been mentioned because it has given rise to a lengthy controversy, and because it throws light on the historical value of Aristotle's statements. From the point of view of his own system, these may be justified; but we shall have to remember in other cases that, when he seems to attribute an idea to some earlier thinker, we are not bound to take what he says in an historical sense." For Anaximander, the principle of things, the constituent of all substances, is nothing determined and not an element such as water in Thales' view. Neither is it something halfway between air and water, or between air and fire, thicker than air and fire, or more subtle than water and earth. Anaximander argues that water cannot embrace all of the opposites found in nature — for example, water can only be wet, never dry — and therefore cannot be the one primary substance; nor could any of the other candidates. He postulated the apeiron as a substance that, although not directly perceptible to us, could explain the opposites he saw around him. "If Thales had been right in saying that water was the fundamental reality, it would not be easy to see how anything else could ever have existed. One side of the opposition, the cold and moist, would have had its way unchecked, and the warm and dry would have been driven from the field long ago. We must, then, have something not itself one of the warring opposites, something more primitive, out of which they arise, and into which they once more pass away." Anaximander explains how the four elements of ancient physics (air, earth, water and fire) are formed, and how Earth and terrestrial beings are formed through their interactions. Unlike other Pre-Socratics, he never defines this principle precisely, and it has generally been understood (e.g., by Aristotle and by Saint Augustine) as a sort of primal chaos. According to him, the Universe originates in the separation of opposites in the primordial matter. It embraces the opposites of hot and cold, wet and dry, and directs the movement of things; an entire host of shapes and differences then grow that are found in "all the worlds" (for he believed there were many). "Anaximander taught, then, that there was an eternal. The indestructible something out of which everything arises, and into which everything returns; a boundless stock from which the waste of existence is continually made good, "elements.". That is only the natural development of the thought we have ascribed to Thales, and there can be no doubt that Anaximander at least formulated it distinctly. Indeed, we can still follow to some extent the reasoning which led him to do so. Thales had regarded water as the most likely thing to be that of which all others are forms; Anaximander appears to have asked how the primary substance could be one of these particular things. His argument seems to be preserved by Aristotle, who has the following passage in his discussion of the Infinite: "Further, there cannot be a single, simple body which is infinite, either, as some hold, one distinct from the elements, which they then derive from it, or without this qualification. For there are some who make this. (i.e. a body distinct from the elements). the infinite, and not air or water, in order that the other things may not be destroyed by their infinity. They are in opposition one to another. air is cold, water moist, and fire hot. and therefore, if any one of them were infinite, the rest would have ceased to be by this time. Accordingly they say that what is infinite is something other than the elements, and from it the elements arise.'⁠—Aristotle Physics. F, 5 204 b 22 (Ritter and Preller (1898) Historia Philosophiae Graecae, section 16 b)." Anaximander maintains that all dying things are returning to the element from which they came (apeiron). The one surviving fragment of Anaximander's writing deals with this matter. Simplicius transmitted it as a quotation, which describes the balanced and mutual changes of the elements: Whence things have their origin, Thence also their destruction happens, According to necessity; For they give to each other justice and recompense For their injustice In conformity with the ordinance of Time. Simplicius mentions that Anaximander said all these "in poetic terms", meaning that he used the old mythical language. The goddess Justice (Dike) keeps the cosmic order. This concept of returning to the element of origin was often revisited afterwards, notably by Aristotle, and by the Greek tragedian Euripides: "what comes from earth must return to earth." Friedrich Nietzsche, in his Philosophy in the Tragic Age of the Greeks, stated that Anaximander viewed "... all coming-to-be as though it were an illegitimate emancipation from eternal being, a wrong for which destruction is the only penance." Physicist Max Born, in commenting upon Werner Heisenberg's arriving at the idea that the elementary particles of quantum mechanics are to be seen as different manifestations, different quantum states, of one and the same "primordial substance,"' proposed that this primordial substance be called apeiron. A free-floating Earth Anaximander was the first to conceive a mechanical model of the world. In his model, the Earth floats very still in the centre of the infinite, not supported by anything. It remains "in the same place because of its indifference", a point of view that Aristotle considered ingenious, in On the Heavens. Its curious shape is that of a cylinder with a height one-third of its diameter. The flat top forms the inhabited world, which is surrounded by a circular oceanic mass. Carlo Rovelli suggests that Anaximander took the idea of the Earth's shape as a floating disk from Thales, who had imagined the Earth floating in water, the "immense ocean from which everything is born and upon which the Earth floats." Anaximander was then able to envisage the Earth at the centre of an infinite space, in which case it required no support as there was nowhere "down" to fall. In Rovelli's view, the shape – a cylinder or a sphere – is unimportant compared to the appreciation of a "finite body that floats free in space." Anaximander's realization that the Earth floats free without falling and does not need to be resting on something has been indicated by many as the first cosmological revolution and the starting point of scientific thinking. Karl Popper calls this idea "one of the boldest, most revolutionary, and most portentous ideas in the whole history of human thinking." Such a model allowed the concept that celestial bodies could pass under the Earth, opening the way to Greek astronomy. Rovelli suggests that seeing the stars circling the Pole star, and both vanishing below the horizon on one side and reappearing above it on the other, would suggest to the astronomer that there was a void both above and below the Earth. Cosmology Anaximander's bold use of non-mythological explanatory hypotheses considerably distinguishes him from previous cosmology writers such as Hesiod. It indicates a pre-Socratic effort to demystify physical processes. His major contribution to history was writing the oldest prose document about the Universe and the origins of life; for this he is often called the "Father of Cosmology" and founder of astronomy. However, pseudo-Plutarch states that he still viewed celestial bodies as deities. He placed the celestial bodies in the wrong order. He thought that the stars were nearest to the earth, then the moon, and the sun farthest away. His scheme is compatible with the Indo-Iranian philosophical traditions contained in the Iranian Avesta och the Indian Upanishads. At the origin, after the separation of hot and cold, a ball of flame appeared that surrounded Earth like bark on a tree. This ball broke apart to form the rest of the Universe. It resembled a system of hollow concentric wheels, filled with fire, with the rims pierced by holes like those of a flute. Consequently, the Sun was the fire that one could see through a hole the same size as the Earth on the farthest wheel, and an eclipse corresponded with the occlusion of that hole. The diameter of the solar wheel was twenty-seven times that of the Earth (or twenty-eight, depending on the sources) and the lunar wheel, whose fire was less intense, eighteen (or nineteen) times. Its hole could change shape, thus explaining lunar phases. The stars and the planets, located closer, followed the same model. Anaximander was the first astronomer to consider the Sun as a huge mass, and consequently, to realize how far from Earth it might be, and the first to present a system where the celestial bodies turned at different distances. Furthermore, according to Diogenes Laertius (II, 2), he built a celestial sphere. This invention undoubtedly made him the first to realize the obliquity of the Zodiac as the Roman philosopher Pliny the Elder reports in Natural History (II, 8). It is a little early to use the term ecliptic, but his knowledge and work on astronomy confirm that he must have observed the inclination of the celestial sphere in relation to the plane of the Earth to explain the seasons. The doxographer and theologian Aetius attributes to Pythagoras the exact measurement of the obliquity. Multiple worlds According to Simplicius, Anaximander already speculated on the plurality of worlds, similar to atomists Leucippus and Democritus, and later philosopher Epicurus. These thinkers supposed that worlds appeared and disappeared for a while, and that some were born when others perished. They claimed that this movement was eternal, "for without movement, there can be no generation, no destruction". In addition to Simplicius, Hippolytus reports Anaximander's claim that from the infinite comes the principle of beings, which themselves come from the heavens and the worlds (several doxographers use the plural when this philosopher is referring to the worlds within, which are often infinite in quantity). Cicero writes that he attributes different gods to the countless worlds. This theory places Anaximander close to the Atomists and the Epicureans who, more than a century later, also claimed that an infinity of worlds appeared and disappeared. In the timeline of the Greek history of thought, some thinkers conceptualized a single world (Plato, Aristotle, Anaxagoras and Archelaus), while others instead speculated on the existence of a series of worlds, continuous or non-continuous (Anaximenes, Heraclitus, Empedocles and Diogenes). Meteorological phenomena Anaximander attributed some phenomena, such as thunder and lightning, to the intervention of elements, rather than to divine causes. In his system, thunder results from the shock of clouds hitting each other; the loudness of the sound is proportionate with that of the shock. Thunder without lightning is the result of the wind being too weak to emit any flame, but strong enough to produce a sound. A flash of lightning without thunder is a jolt of the air that disperses and falls, allowing a less active fire to break free. Thunderbolts are the result of a thicker and more violent air flow. He saw the sea as a remnant of the mass of humidity that once surrounded Earth. A part of that mass evaporated under the sun's action, thus causing the winds and even the rotation of the celestial bodies, which he believed were attracted to places where water is more abundant. He explained rain as a product of the humidity pumped up from Earth by the sun. For him, the Earth was slowly drying up and water only remained in the deepest regions, which someday would go dry as well. According to Aristotle's Meteorology (II, 3), Democritus also shared this opinion. Origin of mankind Anaximander speculated about the beginnings and origin of animal life, and that humans came from other animals in waters. According to his evolutionary theory, animals sprang out of the sea long ago, born trapped in a spiny bark, but as they got older, the bark would dry up and animals would be able to break it. As the early humidity evaporated, dry land emerged and, in time, humankind had to adapt. The 3rd century Roman writer Censorinus reports: Anaximander put forward the idea that humans had to spend part of this transition inside the mouths of big fish to protect themselves from the Earth's climate until they could come out in open air and lose their scales. He thought that, considering humans' extended infancy, we could not have survived in the primeval world in the same manner we do presently. Other accomplishments Cartography Both Strabo and Agathemerus (later Greek geographers) claim that, according to the geographer Eratosthenes, Anaximander was the first to publish a map of the world. The map probably inspired the Greek historian Hecataeus of Miletus to draw a more accurate version. Strabo viewed both as the first geographers after Homer. Maps were produced in ancient times, also notably in Egypt, Lydia, the Middle East, and Babylon. Only some small examples survived until today. The unique example of a world map comes from the late Babylonian Map of the World later than 9th century BC but is based probably on a much older map. These maps indicated directions, roads, towns, borders, and geological features. Anaximander's innovation was to represent the entire inhabited land known to the ancient Greeks. Such an accomplishment is more significant than it at first appears. Anaximander most likely drew this map for three reasons. First, it could be used to improve navigation and trade between Miletus's colonies and other colonies around the Mediterranean Sea and Black Sea. Second, Thales would probably have found it easier to convince the Ionian city-states to join in a federation in order to push the Median threat away if he possessed such a tool. Finally, the philosophical idea of a global representation of the world simply for the sake of knowledge was reason enough to design one. Surely aware of the sea's convexity, he may have designed his map on a slightly rounded metal surface. The centre or “navel” of the world ( omphalós gẽs) could have been Delphi, but is more likely in Anaximander's time to have been located near Miletus. The Aegean Sea was near the map's centre and enclosed by three continents, themselves located in the middle of the ocean and isolated like islands by sea and rivers. Europe was bordered on the south by the Mediterranean Sea and was separated from Asia by the Black Sea, the Lake Maeotis, and, further east, either by the Phasis River (now called the Rioni in Georgia) or the Tanais. The Nile flowed south into the ocean, separating Libya (which was the name for the part of the then-known African continent) from Asia. Gnomon The Suda relates that Anaximander explained some basic notions of geometry. It also mentions his interest in the measurement of time and associates him with the introduction in Greece of the gnomon. In Lacedaemon, he participated in the construction, or at least in the adjustment, of sundials to indicate solstices and equinoxes. Indeed, a gnomon required adjustments from a place to another because of the difference in latitude. In his time, the gnomon was simply a vertical pillar or rod mounted on a horizontal plane. The position of its shadow on the plane indicated the time of day. As it moves through its apparent course, the Sun draws a curve with the tip of the projected shadow, which is shortest at noon, when pointing due south. The variation in the tip's position at noon indicates the solar time and the seasons; the shadow is longest on the winter solstice and shortest on the summer solstice. The invention of the gnomon itself cannot be attributed to Anaximander because its use, as well as the division of days into twelve parts, came from the Babylonians. It is they, according to Herodotus' Histories (II, 109), who gave the Greeks the art of time measurement. It is likely that he was not the first to determine the solstices, because no calculation is necessary. On the other hand, equinoxes do not correspond to the middle point between the positions during solstices, as the Babylonians thought. As the Suda seems to suggest, it is very likely that with his knowledge of geometry, he became the first Greek to determine accurately the equinoxes. Prediction of an earthquake In his philosophical work De Divinatione (I, 50, 112), Cicero states that Anaximander convinced the inhabitants of Lacedaemon to abandon their city and spend the night in the country with their weapons because an earthquake was near. The city collapsed when the top of the Taygetus split like the stern of a ship. Pliny the Elder also mentions this anecdote (II, 81), suggesting that it came from an "admirable inspiration", as opposed to Cicero, who did not associate the prediction with divination. Scientific method Rovelli credits Anaximander with pioneering the "first great scientific revolution in history" by introducing the naturalistic approach to understanding the universe, according to which the universe operates by inviolable laws, without recourse to supernatural explanations. According to Rovelli, Anaximander not only paved the way for modern science, but revolutionized the process for how we form our worldview, by constantly questioning and rejecting certainty. Rovelli further states that Anaximander has not been given his due credit, largely because his naturalistic approach was strongly opposed in antiquity (among others by Aristotle) and had yet to yield the tangible benefits it has today. Legacy In the 2017 essay collection Anaximander in Context: New Studies on the Origins of Greek Philosophy, Dirk Couprie, Robert Hahn and Gerald Naddaf describe Anaximander as "one of the greatest minds in history", but one that has not been given his due. Couprie goes to state that he considers him on par with Newton. Bertrand Russell in the History of Western Philosophy interprets Anaximander's theories as an assertion of the necessity of an appropriate balance between earth, fire, and water, all of which may be independently seeking to aggrandize their proportions relative to the others. Anaximander seems to express his belief that a natural order ensures balance among these elements, that where there was fire, ashes (earth) now exist. His Greek peers echoed this sentiment with their belief in natural boundaries beyond which not even the gods could operate. Friedrich Nietzsche, in Philosophy in the Tragic Age of the Greeks, claimed that Anaximander was a pessimist who asserted that the primal being of the world was a state of indefiniteness. In accordance with this, anything definite has to eventually pass back into indefiniteness. In other words, Anaximander viewed "...all coming-to-be as though it were an illegitimate emancipation from eternal being, a wrong for which destruction is the only penance". (Ibid., § 4) The world of individual objects, in this way of thinking, has no worth and should perish. Martin Heidegger lectured extensively on Anaximander, and delivered a lecture entitled "Anaximander's Saying" which was subsequently included in Off the Beaten Track. The lecture examines the ontological difference and the oblivion of Being or Dasein in the context of the Anaximander fragment. Heidegger's lecture is, in turn, an important influence on the French philosopher Jacques Derrida. The Anaximander (31st) High School of Thessaloniki, Greece is named after Anaximander. Works According to the Suda: On Nature ( / Perì phúseôs) Rotation of the Earth ( / Gễs períodos) On Fixed stars ( / Perì tỗn aplanỗn) The [Celestial] Sphere ( / Sphaĩra) See also Indefinite monism References Sources Primary Aelian: Various History (III, 17) Aëtius: De Fide (I-III; V) Agathemerus: A Sketch of Geography in Epitome (I, 1) Aristotle: Meteorology (II, 3) Translated by E. W. Webster Aristotle: On Generation and Corruption (II, 5) Translated by H. H. Joachim Aristotle: On the Heavens (II, 13) Translated by J. L. Stocks (III, 5, 204 b 33–34) Censorinus: De Die Natali (IV, 7) See original text at LacusCurtius (I, 50, 112) Cicero: On the Nature of the Gods (I, 10, 25) Euripides: The Suppliants (532) Translated by E. P. Coleridge Eusebius of Caesarea: Preparation for the Gospel (X, 14, 11) Translated by E.H. Gifford Heidel, W.A. Anaximander's Book: PAAAS, vol. 56, n.7, 1921, pp. 239–288. Herodotus: Histories (II, 109) See original text in Perseus project Hippolytus (?): Refutation of All Heresies (I, 5) Translated by Roberts and Donaldson Pliny the Elder: Natural History (II, 8) See original text in Perseus project Pseudo-Plutarch: The Doctrines of the Philosophers (I, 3; I, 7; II, 20–28; III, 2–16; V, 19) Seneca the Younger: Natural Questions (II, 18) Simplicius: Comments on Aristotle's Physics (24, 13–25; 1121, 5–9) Strabo: Geography (I, 1) Books 1‑7, 15‑17 translated by H. L. Jones Themistius: Oratio (36, 317) The Suda (Suda On Line) Secondary The default source; anything not otherwise attributed should be in Conche. External links Philoctete – Anaximandre: Fragments ((Grk icon)) The Internet Encyclopedia of Philosophy – Anaximander Extensive bibliography by Dirk Couprie Anaximander of Miletus Life and Work - Fragments and Testimonies by Giannis Stamatellos 6th-century BC Greek philosophers 610s BC births Year of birth unknown 540s BC deaths Year of death unknown Ancient Greek astronomers Ancient Greek cartographers Ancient Greek metaphysicians Ancient Greek physicists Ancient Greeks from the Achaemenid Empire Ancient Milesians Natural philosophers Philosophers of ancient Ionia Presocratic philosophers 6th-century BC geographers 6th-century BC astronomers

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https://en.wikipedia.org/wiki/Architect

Architect

An architect is a person who plans, designs and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that have human occupancy or use as their principal purpose. Etymologically, the term architect derives from the Latin , which derives from the Greek (-, chief + , builder), i.e., chief builder. The professional requirements for architects vary from location to location. An architect's decisions affect public safety and thus the architect must undergo specialized training consisting of advanced education and a practicum (or internship) for practical experience to earn a license to practice architecture. Practical, technical, and academic requirements for becoming an architect vary by jurisdiction though the formal study of architecture in academic institutions has played a pivotal role in the development of the profession. Origins Throughout ancient and medieval history, most architectural design and construction was carried out by artisans—such as stone masons and carpenters, rising to the role of master builder. Until modern times, there was no clear distinction between architect and engineer. In Europe, the titles architect and engineer were primarily geographical variations that referred to the same person, often used interchangeably. "Architect" derives from Greek (, "master builder", "chief ). It is suggested that various developments in technology and mathematics allowed the development of the professional 'gentleman' architect, separate from the hands-on craftsman. Paper was not used in Europe for drawing until the 15th century, but became increasingly available after 1500. Pencils were used for drawing by 1600. The availability of both paper and pencils allowed pre-construction drawings to be made by professionals. Concurrently, the introduction of linear perspective and innovations such as the use of different projections to describe a three-dimensional building in two dimensions, together with an increased understanding of dimensional accuracy, helped building designers communicate their ideas. However, development was gradual and slow going. Until the 18th-century, buildings continued to be designed and set out by craftsmen, with the exception of high-status projects. Architecture In most developed countries, only those qualified with an appropriate license, certification, or registration with a relevant body (often governmental), may legally practice architecture. Such licensure usually required a university degree, successful completion of exams, as well as a training period. Representation of oneself as an architect through the use of terms and titles were restricted to licensed individuals by law, although in general, derivatives such as architectural designer were not legally protected. To practice architecture implies the ability to practice independently of supervision. The term building design professional (or design professional), by contrast, is a much broader term that includes professionals who practice independently under an alternate profession such as engineering professionals, or those who assist in the practice of architecture under the supervision of a licensed architect such as intern architects. In many places, independent, non-licensed individuals, may perform design services outside the professional restrictions such as the design houses or other smaller structures. Practice In the architectural profession, technical and environmental knowledge, design, and construction management, require an understanding of business as well as design. However, design is the driving force throughout the project and beyond. An architect accepts a commission from a client. The commission might involve preparing feasibility reports, building audits, designing a building or several buildings, structures, and the spaces among them. The architect participates in developing the requirements the client wants in the building. Throughout the project (planning to occupancy), the architect coordinates a design team. Structural, mechanical, and electrical engineers are hired by the client or architect, who must ensure that the work is coordinated to construct the design. Design role The architect, once hired by a client, is responsible for creating a design concept that meets the requirements of that client and provides a facility suitable to the required use. The architect must meet with and put questions to the client, in order to ascertain all the requirements (and nuances) of the planned project. Often the full brief is not clear in the beginning. It involves a degree of risk in the design undertaking. The architect may make early proposals to the client which may rework the terms of the brief. The "program" (or brief) is essential to producing a project that meets all the needs of the owner. This becomes a guide for the architect in creating the design concept. Design proposal(s) are generally expected to be both imaginative and pragmatic. Much depends upon the time, place, finance, culture, and available crafts and technology in which the design takes place. The extent and nature of these expectations will vary. Foresight is a prerequisite when designing buildings as it is a very complex and demanding undertaking. Any design concept during the early stage of its generation must take into account a great number of issues and variables including qualities of space(s), the end-use and life-cycle of these proposed spaces, connections, relations, and aspects between spaces including how they are put together and the impact of proposals on the immediate and wider locality. Selection of appropriate materials and technology must be considered, tested, and reviewed at an early stage in the design to ensure there are no setbacks (such as higher-than-expected costs) which could occur later in the project. The site and its surrounding environment as well as the culture and history of the place, will also influence the design. The design must also balance increasing concerns with environmental sustainability. The architect may introduce (intentionally or not), aspects of mathematics and architecture, new or current architectural theory, or references to architectural history. A key part of the design is that the architect often must consult with engineers, surveyors and other specialists throughout the design, ensuring that aspects such as structural supports and air conditioning elements are coordinated. The control and planning of construction costs are also a part of these consultations. Coordination of the different aspects involves a high degree of specialized communication including advanced computer technology such as building information modeling (BIM), computer-aided design (CAD), and cloud-based technologies. Finally, at all times, the architect must report back to the client who may have reservations or recommendations which might introduce further variables into the design. Architects also deal with local and federal jurisdictions regarding regulations and building codes. The architect might need to comply with local planning and zoning laws such as required setbacks, height limitations, parking requirements, transparency requirements (windows), and land use. Some jurisdictions require adherence to design and historic preservation guidelines. Health and safety risks form a vital part of the current design, and in some jurisdictions, design reports and records are required to include ongoing considerations of materials and contaminants, waste management and recycling, traffic control, and fire safety. Means of design Previously, architects employed drawings to illustrate and generate design proposals. While conceptual sketches are still widely used by architects, computer technology has now become the industry standard. Furthermore, design may include the use of photos, collages, prints, linocuts, 3D scanning technology, and other media in design production. Increasingly, computer software is shaping how architects work. BIM technology allows for the creation of a virtual building that serves as an information database for the sharing of design and building information throughout the life-cycle of the building's design, construction, and maintenance. Virtual reality (VR) presentations are becoming more common for visualizing structural designs and interior spaces from the point-of-view perspective. Environmental role Since modern buildings are known to place carbon into the atmosphere, increasing controls are being placed on buildings and associated technology to reduce emissions, increase energy efficiency, and make use of renewable energy sources. Renewable energy sources may be designed into the proposed building by local or national renewable energy providers. As a result, the architect is required to remain abreast of current regulations that are continually being updated. Some new developments exhibit extremely low energy use or passive solar building design. However, the architect is also increasingly being required to provide initiatives in a wider environmental sense. Examples of this include making provisions for low-energy transport, natural daylighting instead of artificial lighting, natural ventilation instead of air conditioning, pollution, and waste management, use of recycled materials, and employment of materials which can be easily recycled. Construction role As the design becomes more advanced and detailed, specifications and detail designs are made of all the elements and components of the building. Techniques in the production of a building are continually advancing which places a demand on the architect to ensure that he or she remains up to date with these advances. Depending on the client's needs and the jurisdiction's requirements, the spectrum of the architect's services during each construction stage may be extensive (detailed document preparation and construction review) or less involved (such as allowing a contractor to exercise considerable design-build functions). Architects typically put projects to tender on behalf of their clients, advise them on the award of the project to a general contractor, facilitate and administer a contract of agreement which is often between the client and the contractor. This contract is legally binding and covers a wide range of aspects including the insurance and commitments of all stakeholders, the status of the design documents, provisions for the architect's access, and procedures for the control of the works as they proceed. Depending on the type of contract utilized, provisions for further sub-contract tenders may be required. The architect may require that some elements are covered by a warranty which specifies the expected life and other aspects of the material, product, or work. In most jurisdictions, prior notification to the relevant authority must be given before commencement of the project, giving the local authority notice to carry out independent inspections. The architect will then review and inspect the progress of the work in coordination with the local authority. The architect will typically review contractor shop drawings and other submittals, prepare and issue site instructions, and provide Certificates for Payment to the contractor (see also Design-bid-build) which is based on the work done as well as any materials and other goods purchased or hired in the future. In the United Kingdom and other countries, a quantity surveyor is often part of the team to provide cost consulting. With large, complex projects, an independent construction manager is sometimes hired to assist in the design and management of the construction. In many jurisdictions, mandatory certification or assurance of the completed work or part of works, is required. This demand for certification entails a high degree of risk; therefore, regular inspections of the work as it progresses on site is required to ensure that the design is in compliance itself as well as following all relevant statutes and permissions. Alternate practice and specializations Recent decades have seen the rise of specializations within the profession. Many architects and architectural firms focus on certain project types (e.g. healthcare, retail, public housing, and event management), technological expertise, or project delivery methods. Some architects specialize in building code, building envelope, sustainable design, technical writing, historic preservation(US) or conservation (UK), and accessibility. Many architects elect to move into real estate (property) development, corporate facilities planning, project management, construction management, chief sustainability officers interior design, city planning, user experience design, and design research. Professional requirements Although there are variations in each location, most of the world's architects are required to register with the appropriate jurisdiction. Architects are typically required to meet three common requirements: education, experience, and examination. Basic educational requirement generally consist of a university degree in architecture. The experience requirement for degree candidates is usually satisfied by a practicum or internship (usually two to three years). Finally, a Registration Examination or a series of exams is required prior to licensure. Professionals who engaged in the design and supervision of construction projects prior to the late 19th century were not necessarily trained in a separate architecture program in an academic setting. Instead, they often trained under established architects. Prior to modern times, there was no distinction between architects and engineers and the title used varied depending on geographical location. They often carried the title of master builder or surveyor after serving a number of years as an apprentice (such as Sir Christopher Wren). The formal study of architecture in academic institutions played a pivotal role in the development of the profession as a whole, serving as a focal point for advances in architectural technology and theory. The use of "Architect" or abbreviations such as "Ar." as a title attached to a person's name was regulated by law in some countries. Fees Architects' fee structure was typically based on a percentage of construction value, as a rate per unit area of the proposed construction, hourly rates, or a fixed lump sum fee. Combination of these structures was also common. Fixed fees were usually based on a project's allocated construction cost and could range between 4 and 12% of new construction cost for commercial and institutional projects, depending on a project's size and complexity. Residential projects ranged from 12 to 20%. Renovation projects typically commanded higher percentages such as 15-20%. Overall billings for architectural firms range widely, depending on their location and economic climate. Billings have traditionally been dependent on the local economic conditions, but with rapid globalization, this is becoming less of a factor for large international firms. Salaries could also vary depending on experience, position within the firm (i.e. staff architect, partner, or shareholder, etc.), and the size and location of the firm. Professional organizations A number of national professional organizations exist to promote career and business development in architecture. The International Union of Architects (UIA) The American Institute of Architects (AIA) US Royal Institute of British Architects (RIBA) UK Architects Registration Board (ARB) UK The Australian Institute of Architects (AIA) Australia The South African Institute of Architects (SAIA) South Africa Association of Consultant Architects (ACA) UK Association of Licensed Architects (ALA) US The Consejo Profesional de Arquitectura y Urbanismo (CPAU) Argentina Indian Institute of Architects (IIA) & Council of Architecture (COA) India The National Organization of Minority Architects (NOMA) US Prizes and awards A wide variety of prizes is awarded by national professional associations and other bodies, recognizing accomplished architects, their buildings, structures, and professional careers. The most lucrative award an architect can receive is the Pritzker Prize, sometimes termed the "Nobel Prize for architecture." The inaugural Pritzker Prize winner was Philip Johnson who was cited "for 50 years of imagination and vitality embodied in a myriad of museums, theatres libraries, houses gardens and corporate structure". The Pritzker Prize has been awarded for forty-two straight editions without interruption, and there are now 22 countries with at least one winning architect. Other prestigious architectural awards are the Royal Gold Medal, the AIA Gold Medal (US), AIA Gold Medal (Australia), and the Praemium Imperiale. Architects in the UK, who have made contributions to the profession through design excellence or architectural education, or have in some other way advanced the profession, might until 1971 be elected Fellows of the Royal Institute of British Architects and can write FRIBA after their name if they feel so inclined. Those elected to chartered membership of the RIBA after 1971 may use the initials RIBA but cannot use the old ARIBA and FRIBA. An Honorary Fellow may use the initials, Hon. FRIBA. and an International Fellow may use the initials Int. FRIBA. Architects in the US, who have made contributions to the profession through design excellence or architectural education, or have in some other way advanced the profession, are elected Fellows of the American Institute of Architects and can write FAIA after their name. Architects in Canada, who have made outstanding contributions to the profession through contribution to research, scholarship, public service, or professional standing to the good of architecture in Canada, or elsewhere, may be recognized as a Fellow of the Royal Architectural Institute of Canada and can write FRAIC after their name. In Hong Kong, those elected to chartered membership may use the initial HKIA, and those who have made a special contribution after nomination and election by The Hong Kong Institute of Architects (HKIA), may be elected as fellow members of HKIA and may use FHKIA after their name. See also References Architecture occupations Professional certification in architecture

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https://en.wikipedia.org/wiki/Abbreviation

Abbreviation

An abbreviation (from Latin , meaning short) is a shortened form of a word or phrase, by any method. It may consist of a group of letters or words taken from the full version of the word or phrase; for example, the word abbreviation itself can be abbreviated as abbr., abbrv., or abbrev.; NPO, for nil (or nothing) per (by) os (mouth) is an abbreviated medical instruction. It may also consist of initials only, a mixture of initials and words, or words or letters representing words in another language (for example, e.g., i.e. or RSVP). Some types of abbreviations are acronyms (some pronounceable, some initialisms) or grammatical contractions or crasis. An abbreviation is a shortening by any of these or other methods. Types Acronyms, initialisms, contractions and crasis share some semantic and phonetic functions, and all four are connected by the term "abbreviation" in loose parlance. An initialism is an abbreviation pronounced by spelling out each letter, i.e. FBI (), USA (), IBM (), BBC () A contraction is a reduction in the length of a word or phrase made by omitting certain of its letters or syllables. Consequently, contractions are a subset of abbreviations. Often, but not always, the contraction includes the first and last letters or elements. Examples of contractions are "li'l" (for "little"), "I'm" (for "I am"), and "he'd've" (for "he would have"). History Abbreviations have a long history. They were created to avoid spelling out whole words. This might be done to save time and space (given that many inscriptions were carved in stone) and also to provide secrecy. In both Greece and Rome the reduction of words to single letters was common. In Roman inscriptions, "Words were commonly abbreviated by using the initial letter or letters of words, and most inscriptions have at least one abbreviation". However, "some could have more than one meaning, depending on their context. (For example, can be an abbreviation for many words, such as , , , , , , and .)" Many frequent abbreviations consisted of more than one letter: for example COS for consul and COSS for its nominative etc. plural consules. Abbreviations were frequently used in English from its earliest days. Manuscripts of copies of the Old English poem Beowulf used many abbreviations, for example the Tironian et () or for and, and for since, so that "not much space is wasted". The standardisation of English in the 15th through 17th centuries included a growth in the use of such abbreviations. At first, abbreviations were sometimes represented with various suspension signs, not only periods. For example, sequences like were replaced with , as in for master and for exacerbate. While this may seem trivial, it was symptomatic of an attempt by people manually reproducing academic texts to reduce the copy time. In the Early Modern English period, between the 15th and 17th centuries, the thorn was used for th, as in ('the'). In modern times, was often used (in the form ) for promotional reasons, as in . During the growth of philological linguistic theory in academic Britain, abbreviating became very fashionable. Likewise, a century earlier in Boston, a fad of abbreviation started that swept the United States, with the globally popular term OK generally credited as a remnant of its influence. Over the years, however, the lack of convention in some style guides has made it difficult to determine which two-word abbreviations should be abbreviated with periods and which should not. This question is considered below. Widespread use of electronic communication through mobile phones and the Internet during the 1990s led to a marked rise in colloquial abbreviation. This was due largely to increasing popularity of textual communication services such as instant and text messaging. The original SMS supported message lengths of 160 characters at most (using the GSM 03.38 character set), for instance. This brevity gave rise to an informal abbreviation scheme sometimes called Textese, with which 10% or more of the words in a typical SMS message are abbreviated. More recently Twitter, a popular social networking service, began driving abbreviation use with 140 character message limits. In HTML, abbreviations can be annotated using <abbr title="Meaning of the abbreviation.">abbreviation</abbr> to reveal its meaning by hovering the cursor. Style conventions in English In modern English, there are several conventions for abbreviations, and the choice may be confusing. The only rule universally accepted is that one should be consistent, and to make this easier, publishers express their preferences in a style guide. Some questions which arise are shown below. Lowercase letters If the original word was capitalized then the first letter of its abbreviation should retain the capital, for example Lev. for Leviticus. When a word is abbreviated to more than a single letter and was originally spelled with lower case letters then there is no need for capitalization. However, when abbreviating a phrase where only the first letter of each word is taken, then all letters should be capitalized, as in YTD for year-to-date, PCB for printed circuit board and FYI for for your information. However, see the following section regarding abbreviations that have become common vocabulary: these are no longer written with capital letters. Periods (full stops) and spaces A period (full stop) is often used to signify an abbreviation, but opinion is divided as to when and if this should happen. According to Hart's Rules, the traditional rule is that abbreviations (in the narrow sense that includes only words with the ending, and not the middle, dropped) terminate with a full stop, whereas contractions (in the sense of words missing a middle part) do not, but there are exceptions. Fowler's Modern English Usage says full stops are used to mark both abbreviations and contractions, but recommends against this practice: advising them only for abbreviations and lower-case initialisms and not for upper-case initialisms and contractions. Some British style guides, such as those for The Guardian and The Economist, require that full stops be entirely omitted from all abbreviations. In American English, the period is usually included regardless of whether or not it is a contraction, e.g. Dr. or Mrs.. In some cases, periods are optional, as in either US or U.S. for United States, EU or E.U. for European Union, and UN or U.N. for United Nations. There are some house styles, however—American ones included—that remove the periods from almost all abbreviations. For example: The U.S. Manual on Uniform Traffic Control Devices advises that periods should not be used with abbreviations on road signs, except for cardinal directions as part of a destination name. (For example, "Northwest Blvd", "W. Jefferson", and "PED XING" all follow this recommendation.) AMA style, used in many medical journals, uses no periods in abbreviations or acronyms, with almost no exceptions. Thus eg, ie, vs, et al, Dr, Mr, MRI, ICU, and hundreds of others contain no periods. The only exceptions are (an abbreviation of Numero, Number), to avoid confusion with the word "No"; initials within persons' names (such as "George R. Smith"); and "St." within persons' names when the person prefers it (such as "Emily R. St. Clair") (but not in city names such as St Louis or St Paul). Acronyms that were originally capitalized (with or without periods) but have since entered the vocabulary as generic words are no longer written with capital letters nor with any periods. Examples are sonar, radar, lidar, laser, snafu, and scuba. Today, spaces are generally not used between single-letter abbreviations of words in the same phrase, so one almost never encounters "U. S." When an abbreviation appears at the end of a sentence, only one period is used: The capital of the United States is Washington, D.C. Plural forms There is a question about how to pluralize abbreviations, particularly acronyms. Some writers tend to pluralize abbreviations by adding (apostrophe s), as in "two PC's have broken screens", although this notation typically indicates possessive case. However, this style is not preferred by many style guides. For instance, Kate Turabian, writing about style in academic writings, allows for an apostrophe to form plural acronyms "only when an abbreviation contains internal periods or both capital and lowercase letters". Turabian would therefore prefer "DVDs" and "URLs" and "Ph.D.'s", while the Modern Language Association explicitly says, "do not use an apostrophe to form the plural of an abbreviation". Also, the American Psychological Association specifically says, "without an apostrophe". However, the 1999 style guide for The New York Times states that the addition of an apostrophe is necessary when pluralizing all abbreviations, preferring "PC's, TV's and VCR's". Following those who would generally omit the apostrophe, to form the plural of run batted in, simply add an s to the end of RBI. RBIs For all other rules, see below: To form the plural of an abbreviation, a number, or a capital letter used as a noun, simply add a lowercase s to the end. Apostrophes following decades and single letters are also common. A group of MPs The roaring 20s Mind your Ps and Qs To indicate the plural of the abbreviation or symbol of a unit of measure, the same form is used as in the singular. 1 lb or 20 lb 1 ft or 16 ft 1 min or 45 min When an abbreviation contains more than one full point, Hart's Rules recommends putting the s after the final one. Ph.D.s M.Phil.s the d.t.s However, subject to any house style or consistency requirement, the same plurals may be rendered less formally as: PhDs MPhils the DTs. (This is the recommended form in the New Oxford Dictionary for Writers and Editors.) According to Hart's Rules, an apostrophe may be used in rare cases where clarity calls for it, for example when letters or symbols are referred to as objects. The x's of the equation Dot the i's and cross the t's However, the apostrophe can be dispensed with if the items are set in italics or quotes: The xs of the equation Dot the 'i's and cross the 't's In Latin, and continuing to the derivative forms in European languages as well as English, single-letter abbreviations had the plural being a doubling of the letter for note-taking. Most of these deal with writing and publishing. A few longer abbreviations use this as well. Conventions followed by publications and newspapers United States Publications based in the U.S. tend to follow the style guides of The Chicago Manual of Style and the Associated Press. The U.S. Government follows a style guide published by the U.S. Government Printing Office. The National Institute of Standards and Technology sets the style for abbreviations of units. United Kingdom Many British publications follow some of these guidelines in abbreviation: For the sake of convenience, many British publications, including the BBC and The Guardian, have completely done away with the use of full stops or periods in all abbreviations. These include: Social titles, e.g. Ms or Mr (though these would usually have not had full stops—see above) Capt, Prof, etc.; Two-letter abbreviations for countries ("US", not "U.S."); Abbreviations beyond three letters (full caps for all except initialisms); Words seldom abbreviated with lower case letters ("PR", instead of "p.r.", or "pr") Names ("FW de Klerk", "GB Whiteley", "Park JS"). A notable exception is The Economist which writes "Mr F. W. de Klerk". Scientific units (see Measurement below). Acronyms are often referred to with only the first letter of the abbreviation capitalized. For instance, the North Atlantic Treaty Organization can be abbreviated as "Nato" or "NATO", and Severe Acute Respiratory Syndrome as "Sars" or "SARS" (compare with "laser" which has made the full transition to an English word and is rarely capitalised at all). Initialisms are always written in capitals; for example the "British Broadcasting Corporation" is abbreviated to "BBC", never "Bbc". An initialism is also an acronym but is not pronounced as a word. When abbreviating scientific units, no space is added between the number and unit (100mph, 100m, 10cm, 10°C). (This is contrary to the SI standard; see below.) Miscellaneous and general rules A doubled letter appears in abbreviations of some Welsh names, as in Welsh the double "l" is a separate sound: "Ll. George" for (British prime minister) David Lloyd George. Some titles, such as "Reverend" and "Honourable", are spelt out when preceded by "the", rather than as "Rev." or "Hon." respectively. This is true for most British publications, and some in the United States. A repeatedly used abbreviation should be spelt out for identification on its first occurrence in a written or spoken passage. Abbreviations likely to be unfamiliar to many readers should be avoided. Measurements: abbreviations or symbols Writers often use shorthand to denote units of measure. Such shorthand can be an abbreviation, such as "in" for "inch" or can be a symbol such as "km" for "kilometre". In the International System of Units (SI) manual the word "symbol" is used consistently to define the shorthand used to represent the various SI units of measure. The manual also defines the way in which units should be written, the principal rules being: The conventions for upper and lower case letters must be observed—for example 1 MW (megawatts) is equal to 1,000,000 watts and 1,000,000,000 mW (milliwatts). No periods should be inserted between letters—for example "m.s" (which is an approximation of "m·s", which correctly uses middle dot) is the symbol for "metres multiplied by seconds", but "ms" is the symbol for milliseconds. No periods should follow the symbol unless the syntax of the sentence demands otherwise (for example a full stop at the end of a sentence). The singular and plural versions of the symbol are identical—not all languages use the letter "s" to denote a plural. Syllabic abbreviation A syllabic abbreviation is usually formed from the initial syllables of several words, such as Interpol = International + police. It is a variant of the acronym. Syllabic abbreviations are usually written using lower case, sometimes starting with a capital letter, and are always pronounced as words rather than letter by letter. Syllabic abbreviations should be distinguished from portmanteaus, which combine two words without necessarily taking whole syllables from each. Albanian In Albanian, syllabic acronyms are sometimes used for composing a person's name, such as Migjeni – an abbreviation from his original name (Millosh Gjergj Nikolla) a famous Albanian poet and writer – or ASDRENI (Aleksander Stavre Drenova), another famous Albanian poet. Other such names which are used commonly in recent decades are GETOAR, composed from Gegeria + Tosks (representing the two main dialects of the Albanian language, Gegë and Toskë), and Arbanon - which is an alternative way used to describe all Albanian lands. English Syllabic abbreviations are not widely used in English. Some UK government agencies such as Ofcom (Office of Communications) and the former Oftel (Office of Telecommunications) use this style. New York City has various neighborhoods named by syllabic abbreviation, such as Tribeca (Triangle below Canal Street) and SoHo (South of Houston Street). This usage has spread into other American cities, giving SoMa, San Francisco (South of Market) and LoDo, Denver (Lower Downtown), amongst others. Chicago-based electric service provider ComEd is a syllabic abbreviation of Commonwealth and (Thomas) Edison. Sections of California are also often colloquially syllabically abbreviated, as in NorCal (Northern California), CenCal (Central California), and SoCal (Southern California). Additionally, in the context of Los Angeles, the syllabic abbreviation SoHo (Southern Hollywood) refers to the southern portion of the Hollywood neighborhood. Partially syllabic abbreviations are preferred by the US Navy, as they increase readability amidst the large number of initialisms that would otherwise have to fit into the same acronyms. Hence DESRON 6 is used (in the full capital form) to mean "Destroyer Squadron 6", while COMNAVAIRLANT would be "Commander, Naval Air Force (in the) Atlantic." Syllabic abbreviations are a prominent feature of Newspeak, the fictional language of George Orwell's dystopian novel Nineteen Eighty-Four. The political contractions of Newspeak—Ingsoc (English Socialism), Minitrue (Ministry of Truth), Miniplenty (Ministry of Plenty)—are described by Orwell as similar to real examples of German (q.v.) and Russian contractions (q.v.) in the 20th century. Like Nazi (Nationalsozialismus) and Gestapo (Geheime Staatspolizei), politburo (Political Bureau of the Central Committee of the Communist Party of the Soviet Union), Comintern (Communist International), kolkhoz (collective farm), and Komsomol (Young Communists' League), the contractions in Newspeak are supposed to have a political function by virtue of their abbreviated structure itself: nice sounding and easily pronounceable, their purpose is to mask all ideological content from the speaker. A more recent syllabic abbreviation has emerged with the disease COVID-19 (Corona Virus Disease 2019) caused by the Severe acute respiratory syndrome coronavirus 2 (itself frequently abbreviated to SARS-CoV-2, partly an initialism). German Syllabic abbreviations were and are common in German; much like acronyms in English, they have a distinctly modern connotation, although contrary to popular belief, many date back to before 1933, if not the end of the Great War. Kriminalpolizei, literally criminal police but idiomatically the Criminal Investigation Department of any German police force, begat KriPo (variously capitalised), and likewise Schutzpolizei (protection police or uniform department) begat SchuPo. Along the same lines, the Swiss Federal Railways' Transit Police—the Transportpolizei—are abbreviated as the TraPo. With the National Socialist German Workers' Party gaining power came a frenzy of government reorganisation, and with it a series of entirely new syllabic abbreviations. The single national police force amalgamated from the Schutzpolizeien of the various states became the OrPo (Ordnungspolizei, "order police"); the state KriPos together formed the "SiPo" (, "security police"); and there was also the Gestapo (Geheime Staatspolizei, "secret state police"). The new order of the German Democratic Republic in the east brought about a conscious denazification, but also a repudiation of earlier turns of phrase in favour of neologisms such as Stasi for Staatssicherheit ("state security", the secret police) and VoPo for Volkspolizei. The phrase politisches Büro, which may be rendered literally as "office of politics" or idiomatically as "political party steering committee", became Politbüro. Syllabic abbreviations are not only used in politics, however. Many business names, trademarks, and service marks from across Germany are created on the same pattern: for a few examples, there is Aldi, from Theo Albrecht, the name of its founder, followed by discount; Haribo, from Hans Riegel, the name of its founder, followed by Bonn, the town of its head office; and Adidas, from Adolf "Adi" Dassler, the nickname of its founder followed by his surname. Russian Syllabic abbreviations are very common in Russian, Belarusian and Ukrainian languages. They are often used as names of organizations. Historically, popularization of abbreviations was a way to simplify mass-education in 1920s (see Likbez). Leninist organisations such as the Comintern (Communist International) and Komsomol (Kommunisticheskii Soyuz Molodyozhi, or "Communist youth union") used Russian language syllabic abbreviations. In the modern Russian language, words like Rosselkhozbank (from Rossiysky selskokhozyaystvenny bank — Russian Agricultural Bank, RusAg) and Minobrnauki (from Ministerstvo obrazovaniya i nauki — Ministry of Education and Science) are still commonly used. In nearby Belarus, there are Beltelecom (Belarus Telecommunication) and Belsat (Belarus Satellite). Spanish Syllabic abbreviations are common in Spanish; examples abound in organization names such as Pemex for Petróleos Mexicanos ("Mexican Petroleums") or Fonafifo for Fondo Nacional de Financimiento Forestal (National Forestry Financing Fund). Malay and Indonesian In Southeast Asian languages, especially in Malay languages, syllabic abbreviations are also common; examples include Petronas (for Petroliam Nasional, "National Petroleum"), its Indonesian equivalent Pertamina (from its original name Perusahaan Pertambangan Minyak dan Gas Bumi Negara, "State Oil and Natural Gas Mining Company"), and Kemenhub (from Kementerian Perhubungan, "Ministry of Transportation") Chinese and Japanese kanji East Asian languages whose writing systems use Chinese characters form abbreviations similarly by using key Chinese characters from a term or phrase. For example, in Japanese the term for the United Nations, kokusai rengō (国際連合) is often abbreviated to kokuren (国連). (Such abbreviations are called ryakugo (略語) in Japanese; see also Japanese abbreviated and contracted words). The syllabic abbreviation of kanji words is frequently used for universities: for instance, Tōdai (東大) for Tōkyō daigaku (東京大学, University of Tokyo) and is used similarly in Chinese: Běidà (北大) for Běijīng Dàxué (北京大学, Peking University). Korean universities often follow the same conventions, such as Hongdae (홍대) as short for Hongik Daehakgyo, or Hongik University. The English phrase "Gung ho" originated as a Chinese abbreviation. See also The abbreviations used in the 1913 edition of Webster's dictionary Notes References External links

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https://en.wikipedia.org/wiki/Afterlife

Afterlife

The afterlife or life after death is a purported existence in which the essential part of an individual's stream of consciousness or identity continues to exist after the death of their physical body. The surviving essential aspect varies between belief systems; it may be some partial element, or the entire soul or spirit, which carries with it one's personal identity. Belief in an afterlife is in contrast to the belief in oblivion after death. In some views, this continued existence takes place in a spiritual realm, while in others, the individual may be reborn into this world and begin the life cycle over again, likely with no memory of what they have done in the past. In this latter view, such rebirths and deaths may take place over and over again continuously until the individual gains entry to a spiritual realm or otherworld. Major views on the afterlife derive from religion, esotericism and metaphysics. Some belief systems, such as those in the Abrahamic tradition, hold that the dead go to a specific place (e.g. Paradise) after death, as determined by God, based on their actions and beliefs during life. In contrast, in systems of reincarnation, such as those in the Indian religions, the nature of the continued existence is determined directly by the actions of the individual in the ended life. Different metaphysical models Theist immortalists generally believe some afterlife awaits people when they die. Members of some generally non-theistic religions believe in an afterlife without reference to a deity. The Sadducees were an ancient Jewish sect that generally believed that there was a God but no existence after death. Many religions, whether they believe in the soul's existence in another world like Christianity, Islam, and many pagan belief systems, or reincarnation like many forms of Hinduism and Buddhism, believe that one's status in the afterlife is a consequence of one's conduct during life. Reincarnation Reincarnation is the philosophical or religious concept that an aspect of a living being starts a new life in a different physical body or form after each death. This concept is also known as rebirth or transmigration and is part of the Saṃsāra/karma doctrine of cyclic existence. Samsara refers to the process in which souls (jivas) go through a sequence of human and animal forms. Traditional Hinduism teaches that each life helps the soul (jivas) learn until the soul becomes purified to the point of enlightenment (unity with the cosmos). All major Indian religions, namely Buddhism, Hinduism, Jainism, and Sikhism have their own interpretations of the idea of reincarnation. The human idea of reincarnation is found in many diverse ancient cultures, and a belief in rebirth/metempsychosis was held by historic Greek figures, such as Pythagoras and Plato. It is also a common belief of various ancient and modern religions such as Spiritism, theosophy, and Eckankar. It is found as well in many tribal societies around the world, in places such as Australia, East Asia, Siberia, and South America. Although the majority of denominations within the Abrahamic religions of Judaism, Christianity, and Islam do not believe that individuals reincarnate, particular groups within these religions do refer to reincarnation; these groups include the mainstream historical and contemporary followers of Kabbalah, the Cathars, Alawites, the Druze, and the Rosicrucians. The historical relations between these sects and the beliefs about reincarnation that were characteristic of neoplatonism, Orphism, Hermeticism, Manicheanism, and Gnosticism of the Roman era as well as the Indian religions have been the subject of recent scholarly research. Unity Church and its founder Charles Fillmore teach reincarnation. Rosicrucians speak of a life review period occurring immediately after death and before entering the afterlife's planes of existence (before the silver cord is broken), followed by a judgment, more akin to a final review or end report over one's life. Heaven and Hell Heaven, the heavens, seven heavens, pure lands, Tian, Jannah, Valhalla, or the Summerland, is a common religious, cosmological, or transcendent place where beings such as gods, angels, jinn, saints, or venerated ancestors are said to originate, be enthroned, or live. According to the beliefs of some religions, heavenly beings can descend to earth or incarnate, and earthly beings can ascend to heaven in the afterlife, or in exceptional cases, enter heaven alive. Heaven is often described as a "higher place", the holiest place, a paradise, in contrast to hell or the underworld or the "low places", and universally or conditionally accessible by earthly beings according to various standards of divinity, goodness, piety, faith or other virtues or right beliefs or the will of God. Some believe in the possibility of a heaven on Earth in a world to come. In Hinduism, heaven is considered as Svarga loka. There are seven positive regions the soul can go to after death and seven negative regions. After completing its stay in the respective region, the soul is subjected to rebirth in different living forms according to its karma. This cycle can be broken after a soul achieves Moksha or Nirvana. Any place of existence, either of humans, souls or deities, outside the tangible world (heaven, hell, or other) is referred to as otherworld. Hell, in many religious and folkloric traditions, is a place of torment and punishment in the afterlife. Religions with a linear divine history often depict hell as an eternal destination, while religions with a cyclic history often depict a hell as an intermediary period between incarnations. Typically, these traditions locate hell in another dimension or under the Earth's surface and often include entrances to hell from the land of the living. Other afterlife destinations include purgatory and limbo. Traditions that do not conceive of the afterlife as a place of punishment or reward merely describe hell as an abode of the dead, the grave, a neutral place (for example, Sheol or Hades) located under the surface of Earth. Ancient religions Ancient Egyptian religion The afterlife played an important role in Ancient Egyptian religion, and its belief system is one of the earliest known in recorded history. When the body died, parts of its soul known as ka (body double) and the ba (personality) would go to the Kingdom of the Dead. While the soul dwelt in the Fields of Aaru, Osiris demanded work as restitution for the protection he provided. Statues were placed in the tombs to serve as substitutes for the deceased. Arriving at one's reward in afterlife was a demanding ordeal, requiring a sin-free heart and the ability to recite the spells, passwords, and formulae of the Book of the Dead. In the Hall of Two Truths, the deceased's heart was weighed against the Shu feather of truth and justice taken from the headdress of the goddess Ma'at. If the heart was lighter than the feather, they could pass on, but if it were heavier they would be devoured by the demon Ammit. Egyptians also believed that being mummified and put in a sarcophagus (an ancient Egyptian "coffin" carved with complex symbols and designs, as well as pictures and hieroglyphs) was the only way to have an afterlife. What are referred to as the Coffin Texts, are inscribed on a coffin and serve as a guide for the challenges in the afterlife. The Coffin texts are more or less a duplication of the Pyramid Texts, which would serve as a guide for Egyptian pharaohs or queens in the afterlife. Only if the corpse had been properly embalmed and entombed in a mastaba, could the dead live again in the Fields of Yalu and accompany the Sun on its daily ride. Due to the dangers the afterlife posed, the Book of the Dead was placed in the tomb with the body as well as food, jewelry, and 'curses'. They also used the "opening of the mouth". Ancient Egyptian civilization was based on religion. The belief in the rebirth after death became the driving force behind funeral practices; for them, death was a temporary interruption rather than complete cessation of life. Eternal life could be ensured by means like piety to the gods, preservation of the physical form through mummification, and the provision of statuary and other funerary equipment. Each human consisted of the physical body, the ka, the ba, and the akh. The Name and Shadow were also living entities. To enjoy the afterlife, all these elements had to be sustained and protected from harm. On 30 March 2010, a spokesman for the Egyptian Culture Ministry claimed it had unearthed a large red granite door in Luxor with inscriptions by User, a powerful adviser to the 18th Dynasty Queen Hatshepsut who ruled between 1479 BC and 1458 BC, the longest of any woman. It believes the false door is a 'door to the Afterlife'. According to the archaeologists, the door was reused in a structure in Roman Egypt. Ancient Greek and Roman religions The Greek god Hades is known in Greek mythology as the king of the underworld, a place where souls live after death. The Greek god Hermes, the messenger of the gods, would take the dead soul of a person to the underworld (sometimes called Hades or the House of Hades). Hermes would leave the soul on the banks of the River Styx, the river between life and death. Charon, also known as the ferry-man, would take the soul across the river to Hades, if the soul had gold: Upon burial, the family of the dead soul would put coins under the deceased's tongue. Once crossed, the soul would be judged by Aeacus, Rhadamanthus and King Minos. The soul would be sent to Elysium, Tartarus, or Asphodel Fields. The Elysian Fields were for the ones that lived pure lives. It consisted of green fields, valleys and mountains, everyone there was peaceful and contented, and the Sun always shone there. Tartarus was for the people that blasphemed against the gods or were rebellious and consciously evil. In Tartarus, the soul would be punished by being burned in lava or stretched on racks. The Asphodel Fields were for a varied selection of human souls including those whose sins equaled their goodness, those who were indecisive in their lives, and those who were not judged. Some heroes of Greek legend are allowed to visit the underworld. The Romans had a similar belief system about the afterlife, with Hades becoming known as Pluto. In the ancient Greek myth about the Labours of Heracles, the hero Heracles had to travel to the underworld to capture Cerberus, the three-headed guard dog, as one of his tasks. In Dream of Scipio, Cicero describes what seems to be an out of body experience, of the soul traveling high above the Earth, looking down at the small planet, from far away. In Book VI of Virgil's Aeneid, the hero, Aeneas, travels to the underworld to see his father. By the River Styx, he sees the souls of those not given a proper burial, forced to wait by the river until someone buries them. While down there, along with the dead, he is shown the place where the wrongly convicted reside, the fields of sorrow where those who committed suicide and now regret it reside, including Aeneas' former lover, the warriors and shades, Tartarus (where the titans and powerful non-mortal enemies of the Olympians reside) where he can hear the groans of the imprisoned, the palace of Pluto, and the fields of Elysium where the descendants of the divine and bravest heroes reside. He sees the river of forgetfulness, Lethe, which the dead must drink to forget their life and begin anew. Lastly, his father shows him all of the future heroes of Rome who will live if Aeneas fulfills his destiny in founding the city. Other eschatological views populate the ancient-Greek worldview. For instance, Plato argued for reincarnation in several dialogues, including the Timaeus. Norse religion The Poetic and Prose Eddas, the oldest sources for information on the Norse concept of the afterlife, vary in their description of the several realms that are described as falling under this topic. The most well-known are: Valhalla: (lit. "Hall of the Slain" i.e. "the Chosen Ones") Half the warriors who die in battle join the god Odin who rules over a majestic hall called Valhalla in Asgard. Fólkvangr: (lit. "Field of the Host") The other half join the goddess Freyja in a great meadow known as Fólkvangr. Niflhel: (lit. "The Dark" or "Misty Hel"). Niflhel is believed to be a place of punishment, where the oathbreakers and other wicked people go. Hel: (lit. "The Covered Hall"). Hel was the daughter of god Loki and her kingdom was located in downward and northward. Snorri Sturluson's Gylfaginning tells of evil men going to Niflhel via Hel. Abrahamic religions Judaism Sheol Sheol, in the Hebrew Bible, is a place of darkness (Job x. 21, 22) to which all the dead go, both the righteous and the unrighteous, regardless of the moral choices made in life, (Gen. xxxvii. 36; Ezek. xxxii.; Isa. xiv.; Job xxx. 23), a place of stillness, (Ps. lxxxviii. 13, xciv. 17; Eccl. ix. 10), at the longest possible distance from heaven (Job xi. 8; Amos ix. 2; Ps. cxxxix. 8). The inhabitants of Sheol were the "shades" (rephaim), entities without personality or strength. Under some circumstances they were thought to be able to be contacted by the living, as the Witch of Endor contacts the shade of Samuel for Saul, but such practices were forbidden (Deuteronomy 18:10). While the Hebrew Bible appears to describe Sheol as the permanent place of the dead, in the Second Temple period (roughly 500 BC – 70 AD) a more diverse set of ideas developed. In some texts, Sheol is considered to be the home of both the righteous and the wicked, separated into respective compartments; in others, it was considered a place of punishment, meant for the wicked dead alone. When the Hebrew scriptures were translated into Greek in ancient Alexandria around 200 BC, the word "Hades" (the Greek underworld) was substituted for Sheol. This is reflected in the New Testament where Hades is both the underworld of the dead and the personification of the evil it represents. World to Come The Talmud offers a number of thoughts relating to the afterlife. After death, the soul is brought for judgment. Those who have led pristine lives enter immediately into the Olam Haba or world to come. Most do not enter the world to come immediately, but experience a period of reflection of their earthly actions and are made aware of what they have done wrong. Some view this period as being a "re-schooling", with the soul gaining wisdom as one's errors are reviewed. Others view this period to include spiritual discomfort for past wrongs. At the end of this period, not longer than one year, the soul then takes its place in the world to come. Although discomforts are made part of certain Jewish conceptions of the afterlife, the concept of eternal damnation is not a tenet of the Jewish afterlife. According to the Talmud, extinction of the soul is reserved for a far smaller group of malicious and evil leaders, either whose very evil deeds go way beyond norms, or who lead large groups of people to utmost evil. This is also part of Maimonides' 13 principles of faith. Maimonides describes the Olam Haba in spiritual terms, relegating the prophesied physical resurrection to the status of a future miracle, unrelated to the afterlife or the Messianic era. According to Maimonides, an afterlife continues for the soul of every human being, a soul now separated from the body in which it was "housed" during its earthly existence. The Zohar describes Gehenna not as a place of punishment for the wicked but as a place of spiritual purification for souls. Reincarnation in Jewish tradition Although there is no reference to reincarnation in the Talmud or any prior writings, according to rabbis such as Avraham Arieh Trugman, reincarnation is recognized as being part and parcel of Jewish tradition. Trugman explains that it is through oral tradition that the meanings of the Torah, its commandments and stories, are known and understood. The classic work of Jewish mysticism, the Zohar, is quoted liberally in all Jewish learning; in the Zohar the idea of reincarnation is mentioned repeatedly. Trugman states that in the last five centuries the concept of reincarnation, which until then had been a much hidden tradition within Judaism, was given open exposure. Shraga Simmons commented that within the Bible itself, the idea [of reincarnation] is intimated in Deut. 25:5–10, Deut. 33:6 and Isaiah 22:14, 65:6. Yirmiyahu Ullman wrote that reincarnation is an "ancient, mainstream belief in Judaism". The Zohar makes frequent and lengthy references to reincarnation. Onkelos, a righteous convert and authoritative commentator of the same period, explained the verse, "Let Reuben live and not die ..." (Deuteronomy 33:6) to mean that Reuben should merit the World to Come directly, and not have to die again as a result of being reincarnated. Torah scholar, commentator and kabbalist, Nachmanides (Ramban 1195–1270), attributed Job's suffering to reincarnation, as hinted in Job's saying "God does all these things twice or three times with a man, to bring back his soul from the pit to... the light of the living' (Job 33:29, 30)." Reincarnation, called gilgul, became popular in folk belief, and is found in much Yiddish literature among Ashkenazi Jews. Among a few kabbalists, it was posited that some human souls could end up being reincarnated into non-human bodies. These ideas were found in a number of Kabbalistic works from the 13th century, and also among many mystics in the late 16th century. Martin Buber's early collection of stories of the Baal Shem Tov's life includes several that refer to people reincarnating in successive lives. Among well known (generally non-kabbalist or anti-kabbalist) rabbis who rejected the idea of reincarnation are Saadia Gaon, David Kimhi, Hasdai Crescas, Yedayah Bedershi (early 14th century), Joseph Albo, Abraham ibn Daud, the Rosh and Leon de Modena. Saadia Gaon, in Emunoth ve-Deoth (Hebrew: "beliefs and opinions") concludes Section VI with a refutation of the doctrine of metempsychosis (reincarnation). While rebutting reincarnation, Saadia Gaon further states that Jews who hold to reincarnation have adopted non-Jewish beliefs. By no means do all Jews today believe in reincarnation, but belief in reincarnation is not uncommon among many Jews, including Orthodox. Other well-known rabbis who are reincarnationists include Yonassan Gershom, Abraham Isaac Kook, Talmud scholar Adin Steinsaltz, DovBer Pinson, David M. Wexelman, Zalman Schachter, and many others. Reincarnation is cited by authoritative biblical commentators, including Ramban (Nachmanides), Menachem Recanti and Rabbenu Bachya. Among the many volumes of Yitzchak Luria, most of which come down from the pen of his primary disciple, Chaim Vital, are insights explaining issues related to reincarnation. His Shaar HaGilgulim, "The Gates of Reincarnation", is a book devoted exclusively to the subject of reincarnation in Judaism. Rabbi Naftali Silberberg of The Rohr Jewish Learning Institute notes that "Many ideas that originate in other religions and belief systems have been popularized in the media and are taken for granted by unassuming Jews." Christianity Mainstream Christianity professes belief in the Nicene Creed, and English versions of the Nicene Creed in current use include the phrase: "We look for the resurrection of the dead, and the life of the world to come." When questioned by the Sadducees about the resurrection of the dead (in a context relating to who one's spouse would be if one had been married several times in life), Jesus said that marriage will be irrelevant after the resurrection as the resurrected will be like the angels in heaven. Jesus also maintained that the time would come when the dead would hear the voice of the Son of God, and all who were in the tombs would come out; those who have heard His "[commandments] and believes in the one who sent [Him]" to the resurrection of life, but those who do not to the resurrection of condemnation. The Book of Enoch describes Sheol as divided into four compartments for four types of the dead: the faithful saints who await resurrection in Paradise, the merely virtuous who await their reward, the wicked who await punishment, and the wicked who have already been punished and will not be resurrected on Judgment Day. The Book of Enoch is considered apocryphal by most denominations of Christianity and all denominations of Judaism. The book of 2 Maccabees gives a clear account of the dead awaiting a future resurrection and judgment in addition to prayers and offerings for the dead to remove the burden of sin. The author of Luke recounts the story of Lazarus and the rich man, which shows people in Hades awaiting the resurrection either in comfort or torment. The author of the Book of Revelation writes about God and the angels versus Satan and demons in an epic battle at the end of times when all souls are judged. There is mention of ghostly bodies of past prophets, and the transfiguration. The non-canonical Acts of Paul and Thecla speak of the efficacy of prayer for the dead so that they might be "translated to a state of happiness". Hippolytus of Rome pictures the underworld (Hades) as a place where the righteous dead, awaiting in the bosom of Abraham their resurrection, rejoice at their future prospect, while the unrighteous are tormented at the sight of the "lake of unquenchable fire" into which they are destined to be cast. Gregory of Nyssa discusses the long-before believed possibility of purification of souls after death. Pope Gregory I repeats the concept, articulated over a century earlier by Gregory of Nyssa that the saved suffer purification after death, in connection with which he wrote of "purgatorial flames". The noun "purgatorium" (Latin: place of cleansing) is used for the first time to describe a state of painful purification of the saved after life. The same word in adjectival form (purgatorius -a -um, cleansing), which appears also in non-religious writing, was already used by Christians such as Augustine of Hippo and Pope Gregory I to refer to an after-death cleansing. During the Age of Enlightenment, theologians and philosophers presented various philosophies and beliefs. A notable example is Emanuel Swedenborg who wrote some 18 theological works which describe in detail the nature of the afterlife according to his claimed spiritual experiences, the most famous of which is Heaven and Hell. His report of life there covers a wide range of topics, such as marriage in heaven (where all angels are married), children in heaven (where they are raised by angel parents), time and space in heaven (there are none), the after-death awakening process in the World of Spirits (a place halfway between Heaven and Hell and where people first wake up after death), the allowance of a free will choice between Heaven or Hell (as opposed to being sent to either one by God), the eternity of Hell (one could leave but would never want to), and that all angels or devils were once people on earth. The Catholic Church The Catholic conception of the afterlife teaches that after the body dies, the soul is judged, the righteous and free of sin enter Heaven. However, those who die in unrepented mortal sin go to hell. In the 1990s, the Catechism of the Catholic Church defined hell not as punishment imposed on the sinner but rather as the sinner's self-exclusion from God. Unlike other Christian groups, the Catholic Church teaches that those who die in a state of grace, but still carry venial sin, go to a place called Purgatory where they undergo purification to enter Heaven. Limbo Despite popular opinion, Limbo, which was elaborated upon by theologians beginning in the Middle Ages, was never recognized as a dogma of the Catholic Church, yet, at times, it has been a very popular theological theory within the Church. Limbo is a theory that unbaptized but innocent souls, such as those of infants, virtuous individuals who lived before Jesus Christ was born on earth, or those that die before baptism exist in neither Heaven nor Hell proper. Therefore, these souls neither merit the beatific vision, nor are subjected to any punishment, because they are not guilty of any personal sin although they have not received baptism, so still bear original sin. So they are generally seen as existing in a state of natural, but not supernatural, happiness, until the end of time. In other Christian denominations it has been described as an intermediate place or state of confinement in oblivion and neglect. Purgatory The notion of purgatory is associated particularly with the Catholic Church. In the Catholic Church, all those who die in God's grace and friendship, but still imperfectly purified, are indeed assured of their eternal salvation; but after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven or the final purification of the elect, which is entirely different from the punishment of the damned. The tradition of the church, by reference to certain texts of scripture, speaks of a "cleansing fire" although it is not always called purgatory. Anglicans of the Anglo-Catholic tradition generally also hold to the belief. John Wesley, the founder of Methodism, believed in an intermediate state between death and the resurrection of the dead and in the possibility of "continuing to grow in holiness there", but Methodism does not officially affirm this belief and denies the possibility of helping by prayer any who may be in that state. Orthodox Christianity The Orthodox Church is intentionally reticent on the afterlife, as it acknowledges the mystery especially of things that have not yet occurred. Beyond the second coming of Jesus, bodily resurrection, and final judgment, all of which is affirmed in the Nicene Creed (325 CE), Orthodoxy does not teach much else in any definitive manner. Unlike Western forms of Christianity, however, Orthodoxy is traditionally non-dualist and does not teach that there are two separate literal locations of heaven and hell, but instead acknowledges that "the 'location' of one's final destiny—heaven or hell—as being figurative." Instead, Orthodoxy teaches that the final judgment is one's uniform encounter with divine love and mercy, but this encounter is experienced multifariously depending on the extent to which one has been transformed, partaken of divinity, and is therefore compatible or incompatible with God. "The monadic, immutable, and ceaseless object of eschatological encounter is therefore the love and mercy of God, his glory which infuses the heavenly temple, and it is the subjective human reaction which engenders multiplicity or any division of experience." For instance, St. Isaac the Syrian observes in his Ascetical Homilies that "those who are punished in Gehenna, are scourged by the scourge of love. ... The power of love works in two ways: it torments sinners ... [as] bitter regret. But love inebriates the souls of the sons of Heaven by its delectability." In this sense, the divine action is always, immutably, and uniformly love and if one experiences this love negatively, the experience is then one of self-condemnation because of free will rather than condemnation by God. Orthodoxy therefore uses the description of Jesus' judgment in John 3:19–21 as their model: "19 And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil. 20 For everyone who does wicked things hates the light and does not come to the light, lest his works should be exposed. 21 But whoever does what is true comes to the light, so that it may be clearly seen that his works have been carried out in God." As a characteristically Orthodox understanding, then, Fr. Thomas Hopko writes, "[I]t is precisely the presence of God's mercy and love which cause the torment of the wicked. God does not punish; he forgives... . In a word, God has mercy on all, whether all like it or not. If we like it, it is paradise; if we do not, it is hell. Every knee will bend before the Lord. Everything will be subject to Him. God in Christ will indeed be "all and in all," with boundless mercy and unconditional pardon. But not all will rejoice in God's gift of forgiveness, and that choice will be judgment, the self-inflicted source of their sorrow and pain." Moreover, Orthodoxy includes a prevalent tradition of apokatastasis, or the restoration of all things in the end. This has been taught most notably by Origen, but also many other Church fathers and Saints, including Gregory of Nyssa. The Second Council of Constantinople (553 CE) affirmed the orthodoxy of Gregory of Nyssa while simultaneously condemning Origen's brand of universalism because it taught the restoration back to our pre-existent state, which Orthodoxy doesn't teach. It is also a teaching of such eminent Orthodox theologians as Olivier Clément, Metropolitan Kallistos Ware, and Bishop Hilarion Alfeyev. Although apokatastasis is not a dogma of the church but instead a theologoumenon, it is no less a teaching of the Orthodox Church than its rejection. As Met. Kallistos Ware explains, "It is heretical to say that all must be saved, for this is to deny free will; but, it is legitimate to hope that all may be saved," as insisting on torment without end also denies free will. The Church of Jesus Christ of Latter-day Saints Joseph F. Smith of the Church of Jesus Christ of Latter-day Saints presents an elaborate vision of the afterlife. It is revealed as the scene of an extensive missionary effort by righteous spirits in paradise to redeem those still in darkness—a spirit prison or "hell" where the spirits of the dead remain until judgment. It is divided into two parts: Spirit Prison and Paradise. Together these are also known as the Spirit World (also Abraham's Bosom; see Luke 16:19–25). They believe that Christ visited spirit prison (1 Peter 3:18–20) and opened the gate for those who repent to cross over to Paradise. This is similar to the Harrowing of Hell doctrine of some mainstream Christian faiths. Both Spirit Prison and Paradise are temporary according to Latter-day Saint beliefs. After the resurrection, spirits are assigned "permanently" to three degrees of heavenly glory, determined by how they lived – Celestial, Terrestrial, and Telestial. (1 Cor 15:44–42; Doctrine and Covenants, Section 76) Sons of Perdition, or those who have known and seen God and deny it, will be sent to the realm of Satan, which is called Outer Darkness, where they shall live in misery and agony forever. However, according to the beliefs of the Church of Jesus Christ of Latter Day Saints, most persons lack the amount of knowledge to commit the Eternal sin and are therefore incapable of becoming sons of perdition. The Celestial Kingdom is believed to be a place where the righteous can live eternally with their families. Progression does not end once one has entered the Celestial Kingdom, but extends eternally. According to "True to the Faith" (a handbook on doctrines in the LDS faith), "The celestial kingdom is the place prepared for those who have "received the testimony of Jesus" and been "made perfect through Jesus the mediator of the new covenant, who wrought out this perfect atonement through the shedding of his own blood" (Doctrine and Covenants, 76:51, 69). To inherit this gift, we must receive the ordinances of salvation, keep the commandments, and repent of our sins." Jehovah's Witnesses Jehovah's Witnesses occasionally use terms such as "afterlife" to refer to any hope for the dead, but they understand Ecclesiastes 9:5 to preclude belief in an immortal soul. Individuals judged by God to be wicked, such as in the Great Flood or at Armageddon, are given no hope of an afterlife. However, they believe that after Armageddon there will be a bodily resurrection of "both righteous and unrighteous" dead (but not the "wicked"). Survivors of Armageddon and those who are resurrected are then to gradually restore earth to a paradise. After Armageddon, unrepentant sinners are punished with eternal death (non-existence). Seventh-day Adventists The Seventh-day Adventist Church's beliefs regarding the afterlife differ from other Christian churches. Rather than ascend to Heaven or descend to Hell, Adventists believe the dead "remain unconscious until the return of Christ in judgement". The concept that the dead remain dead until resurrection is one of the fundamental beliefs of Seventh-day Adventism. Adventists believe that death is an unconscious state (a "sleep"). This is based on Matt. 9:24; Mark 5:39; John 11:11–14; 1 Cor. 15:51, 52; 1 Thess. 4:13–17; 2 Peter 3:4; Eccl. 9:5, 6, 10. At death, all consciousness ends. The dead person does not know anything and does not do anything. They believe that death is a decreation, or an undoing of what was created. This is described in Ecclesiastes 12:7: "When a person dies, the body turns to dust again, and the spirit goes back to God, who gave it." The spirit of every person who dies—whether saved or unsaved—returns to God at death. The spirit that returns to God at death is the breath of life. Islam The Quran (the holy book of Islam), emphasizes the insignificance of worldly life (ḥayāt ad-dunyā usually translated as "this world") vis-a-vis the hereafter. A central doctrine of Islamic faith is the Last Day (al-yawm al-ākhir, also known by other names), on which the world will come to an end and God will raise all mankind (as well as the jinn) from the dead and evaluate their worldly actions. The resurrected will be judged according to their deeds, records of which are kept on two books compiled for every human being—one for their good deeds and one for their evil ones. Having been judged, the resurrected will cross the bridge of As-Sirāt over the pit of hell; when the condemned attempt to they will be made to fall off into hellfire below; while the righteous will have no trouble and continue on to their eternal abode of heaven. Afterlife in Islam actually begins before the Last Day. After death, humans will be questioned about their faith by two angels, Munkar and Nakīr. Those who die as martyrs go immediately to paradise. Others who have died and been buried, will receive a taste of their eternal reward from the al-qabr or "the grave" (compare the Jewish concept of Sheol). Those bound for hell will suffer "punishment of the grave", while those bound for heaven will find the grave "peaceful and blessed". Islamic scripture — the Quran and hadith (reports of the words and deeds of the Islamic Prophet Muhammad who is believed to have visited heaven and hell during his Isra and Mi'raj journey) – give vivid descriptions of the pleasures of paradise (Jannah) and sufferings of hell (Jahannam). The gardens of jannah have cool shade adorned couchs and cushions rich carpets spread out, cups full of wine and every meat and fruit . Men will be provided with perpetually youthful, beautiful ḥūr, "untouched beforehand by man or jinn", with large, beautiful eyes . (In recent years some have argued that the term ḥūr refers both to pure men and pure women, and/or that Quranic references to "immortal boys" (, ) or "young men" () (ghilmān, wildān, and suqāh) who serve wine and meals to the blessed, are the male equivalents of hur.) In contrast, those in Jahannam will dwell in a land infested with thousands of serpents and scorpions; be "burnt" by "scorching fire" and when "their skins are roasted through, We shall change them for fresh skins" to repeat the process forever ; they will have nothing to drink but "boiling water and running sores" ; their cries of remorse and pleading for forgiveness will be in vain . Traditionally jannah and jahannam are thought to have different levels. Eight gates and eight levels in Jannah, where the higher the level the better it is and the happier you are. Jahannam possess seven layers. Each layer more horrible than the one above. The Quran teaches that the purpose of Man's creation is to worship God and God alone. Those it describes as being punished in hell are "most typically", unbelievers, including those who worship others besides Allah , those who deny the divine origin of the Quran , or the coming of Judgement Day . Straightforward crimes/sins against other people are also grounds for going to hell: the murder of a believer , usury (Q.2:275), devouring the property of an orphan , slander , particularly of a chaste woman . However it is a common belief among Muslims that whatever crimes/sins Muslims may have committed, their punishment in hell will be temporary. Only unbelievers will reside in hell permanently. Thus Jahannam combines both the concept of an eternal hell (for unbelievers), and what is known in Christian Catholicism as purgatory (for believers eventually destined for heaven after punishment for their sins). The common belief holds that Jahannam coexists with the temporal world. Mainstream Islam teaches the continued existence of the soul and a transformed physical existence after death. The resurrection that will take place on the Last Day is physical, and is explained by suggesting that God will re-create the decayed body ("Have they not realized that Allah, Who created the heavens and the earth, can ˹easily˺ re-create them?" ). Ahmadiyya Ahmadi Muslims believe that the afterlife is not material but of a spiritual nature. According to Mirza Ghulam Ahmad, founder of the Ahmadiyya Muslim Community, the soul will give birth to another rarer entity and will resemble the life on this earth in the sense that this entity will bear a similar relationship to the soul as the soul bears relationship with the human existence on earth. On earth, if a person leads a righteous life and submits to the will of God, his or her tastes become attuned to enjoying spiritual pleasures as opposed to carnal desires. With this, an "embryonic soul" begins to take shape. Different tastes are said to be born which a person given to carnal passions finds no enjoyment. For example, sacrifice of one's own rights over that of others becomes enjoyable, or that forgiveness becomes second nature. In such a state a person finds contentment and peace at heart and at this stage, according to Ahmadiyya beliefs, it can be said that a soul within the soul has begun to take shape. Sufism The Sufi Muslim scholar Ibn 'Arabi defined Barzakh as the intermediate realm or "isthmus". It is between the world of corporeal bodies and the world of spirits, and is a means of contact between the two worlds. Without it, there would be no contact between the two and both would cease to exist. He described it as simple and luminous, like the world of spirits, but also able to take on many different forms just like the world of corporeal bodies can. In broader terms Barzakh, "is anything that separates two things". It has been called the dream world in which the dreamer is in both life and death. Baháʼí Faith The teachings of the Baháʼí Faith state that the nature of the afterlife is beyond the understanding of those living, just as an unborn fetus cannot understand the nature of the world outside of the womb. The Baháʼí writings state that the soul is immortal and after death it will continue to progress until it finally attains God's presence. In Baháʼí belief, souls in the afterlife will continue to retain their individuality and consciousness and will be able to recognize and communicate spiritually with other souls whom they have made deep profound friendships with, such as their spouses. The Baháʼí scriptures also state there are distinctions between souls in the afterlife, and that souls will recognize the worth of their own deeds and understand the consequences of their actions. It is explained that those souls that have turned toward God will experience gladness, while those who have lived in error will become aware of the opportunities they have lost. Also, in the Baháʼí view, souls will be able to recognize the accomplishments of the souls that have reached the same level as themselves, but not those that have achieved a rank higher than them. Indian religions Early Indian religions were characterized by the belief in an afterlife, Ancestor worship, and related rites. These concepts started to significantly change after the period of the Upanishads. Buddhism Afterlife in Buddhism is complex, consisting of an intermediated spirit world, the six realms of existence, and the pure land after achieving enlightenment. Ancestor worship, and links to one's ancestors, was once an important component of early Buddhism, but became less relevant already before the formation of the different Buddhist streams. The concepts and importance of afterlife vary among modern Buddhist teachings. Buddhists maintain that rebirth takes place without an unchanging self or soul passing from one form to another. The type of rebirth will be conditioned by the moral tone of the person's actions (kamma or karma). For example, if a person has committed harmful actions by body, speech and mind based on greed, hate and delusion, would have his/her rebirth in a lower realm, i.e. an animal, a hungry ghost or a hell realm, is to be expected. On the other hand, where a person has performed skillful actions based on generosity, loving-kindness (metta), compassion and wisdom, rebirth in a happy realm, i.e. human or one of the many heavenly realms, can be expected. However, the mechanism of rebirth with Kamma is not deterministic. It depends on various levels of kamma. The most important moment that determines where a person is reborn into is the last thought moment. At that moment, heavy kamma would ripen if there were performed. If not, near death kamma would ripen, and if not death kamma, then habitual kamma would ripen. Finally if none of the above happened, then residual kamma from previous actions can ripen. According to Theravada Buddhism, there are 31 realms of existence that one can be reborn into. According to these, 31 existences comprise 20 existences of supreme deities (Brahmas); 6 existences of deities (Devas); the human existence (Manussa); and, lastly, 4 existences of deprivation or unhappiness (Apaya). Pure Land Buddhism of Mahayana believes in a special place apart from the 31 planes of existence called Pure Land. It is believed that each Buddha has their own pure land, created out of their merits for the sake of sentient beings who recall them mindfully to be able to be reborn in their pure land and train to become a Buddha there. Thus the main practice of pure land Buddhism is to chant a Buddha's name. In Tibetan Buddhism the Tibetan Book of the Dead explains the intermediate state of humans between death and reincarnation. The deceased will find the bright light of wisdom, which shows a straightforward path to move upward and leave the cycle of reincarnation. There are various reasons why the deceased do not follow that light. Some had no briefing about the intermediate state in the former life. Others only used to follow their basic instincts like animals. And some have fear, which results from foul deeds in the former life or from insistent haughtiness. In the intermediate state the awareness is very flexible, so it is important to be virtuous, adopt a positive attitude, and avoid negative ideas. Ideas which are rising from subconsciousness can cause extreme tempers and cowing visions. In this situation they have to understand, that these manifestations are just reflections of the inner thoughts. No one can really hurt them, because they have no more material body. The deceased get help from different Buddhas who show them the path to the bright light. The ones who do not follow the path after all will get hints for a better reincarnation. They have to release the things and beings on which or whom they still hang from the life before. It is recommended to choose a family where the parents trust in the Dharma and to reincarnate with the will to care for the welfare of all beings. Hinduism There are two major views of afterlife in Hinduism: mythical and philosophical. The philosophies of Hinduism consider each individual consists of 3 bodies: physical body compose of water and bio-matter (sthūla śarīra), an energetic/psychic/mental/subtle body (sūkṣma-śarīra) and a causal body (kāraṇa śarīra) comprising subliminal stuff i.e. mental impressions etc. The individual is a stream of consciousness (Ātman) which flows through all the physical changes of the body and at the death of the physical body, flows on into another physical body. The two components that transmigrate are the subtle body and the causal body. The thought that occupies the mind at the time of death determines the quality of our rebirth (antim smaraṇa), hence Hinduism advises to be mindful of one's thoughts and cultivate positive wholesome thoughts – Mantra chanting (Japa) is commonly practiced for this. The mythical includes the philosophical but adds heaven and hell myths. When one leaves the physical body at death he appears in the court of Lord Yama, the God of Death for an exit interview. The panel consists of Yama and Chitragupta – the cosmic accountant, he has a book which consists the history of the dead persons according to his/her mistakes the Lord Yama decides the punishment is and Varuna the cosmic intelligence officer. He is counseled about his life, achievements and failures and is shown a mirror in which his entire life is reflected. (Philosophically these three men are projections of one's mind) Yama the Lord of Justice then sends him to a heavenly realm (svarga) if he has been exceptionally benevolent and beneficent for a period of Rest and Recreation. his period is limited in time by the weight of his good deeds. If he has been exceptionally malevolent and caused immense suffering to other beings then he is sent to a hell realm (naraka) for his sins. After one has exhausted his karmas, he takes birth again to continue his spiritual evolution. However, belief in rebirth was not a part of early Vedic religions and texts. It was later developed by Rishis who challenged the idea of one life as being simplistic. Rebirth can take place as a god (deva), a human (manuṣya) an animal (tiryak) — but it is generally taught that the spiritual evolution takes place from lower to higher species. In certain cases of traumatic death a person can take the form of a Preta or Hungry Ghost – and remains in an earth-bound state interminably – until certain ceremonies are done to liberate them. This mythological part is extensively elaborated in the Hindu Puranas especially in the Garuda Purana. The Upanishads are the first scriptures in Hinduism which explicitly mention about Afterlife, The Bhagavad Gita, a famous Hindu script, says that just as a man discards his old clothes and wears new ones; similarly the Atman discards the old body and takes on a new one. In Hinduism, the belief is that the body is nothing but a shell, the consciousness inside is immutable and indestructible and takes on different lives in a cycle of birth and death. The end of this cycle is called mukti (Sanskrit: मुक्ति) and staying finally with the ultimate reality forever; is moksha (Sanskrit: मोक्ष) or liberation. The (diverse) views of modern Hinduism in part differ significantly from the Historical Vedic religion. Jainism Jainism also believes in the afterlife. They believe that the soul takes on a body form based on previous karmas or actions performed by that soul through eternity. Jains believe the soul is eternal and that the freedom from the cycle of reincarnation is the means to attain eternal bliss. Sikhism The essential doctrine of Sikhism is to experience the divine through simple living, meditation, and contemplation while being alive. Sikhism also has the belief of being in union with God while living. Accounts of afterlife are considered to be aimed at the popular prevailing views of the time so as to provide a referential framework without necessarily establishing a belief in the afterlife. Thus while it is also acknowledged that living the life of a householder is above the metaphysical truth, Sikhism can be considered agnostic to the question of an afterlife. Some scholars also interpret the mention of reincarnation to be naturalistic akin to the biogeochemical cycles. But if one analyses the Sikh Scriptures carefully, one may find that on many occasions the afterlife and the existence of heaven and hell are mentioned and criticised in Guru Granth Sahib and in Dasam Granth as non true man made ideas, so from that it can be concluded that Sikhism does not believe in the existence of heaven and hell; however, heaven and hell are created to temporarily reward and punish, and one will then take birth again until one merges in God. According to the Sikh scriptures, the human form is the closet form to God if the Guru is read and understood, and the best opportunity for a human being to attain salvation and merge back with God and fully understand Him. Sikh Gurus said that nothing dies, nothing is born, everything is ever present, and it just changes forms. Like standing in front of a wardrobe, you pick up a dress and wear it and then you discard it. You wear another one. Thus, in the view of Sikhism, your soul is never born and never dies. Your soul is a part of God and hence lives forever. Others Confucianism Confucius did not directly discuss the afterlife. Nonetheless, Chinese folk religion has had a strong influence on Confucianism, so adherents believe that their ancestors become deified spirits after death. Ancestor veneration in China is widespread. Gnosticism In Gnostic teachings humans contain a divine spark within them said to have been trapped in their bodies by the creator of the material universe known as the Demiurge. It was believed that this spark could be released from the material world and enter into the heavenly spiritual world beyond it if special knowledge or gnosis was attained. The Cathars, for example, viewed reincarnation as a trap made by Satan, who tricked angels from the heavenly realm into entering the physical bodies of humans. They viewed the purpose of life as a way to escape the constant cycle of spiritual incarnations by letting go of worldly attachments. Shinto It is common for families to participate in ceremonies for children at a shrine, yet have a Buddhist funeral at the time of death. In old Japanese legends, it is often claimed that the dead go to a place called yomi (黄泉), a gloomy underground realm with a river separating the living from the dead mentioned in the legend of Izanami and Izanagi. This yomi very closely resembles the Greek Hades; however, later myths include notions of resurrection and even Elysium-like descriptions such as in the legend of Ōkuninushi and Susanoo. Shinto tends to hold negative views on death and corpses as a source of pollution called kegare. However, death is also viewed as a path towards apotheosis in Shintoism as can be evidenced by how legendary individuals become enshrined after death. Perhaps the most famous would be Emperor Ōjin who was enshrined as Hachiman the God of War after his death. Spiritualism According to Edgar Cayce, the afterlife consisted of nine realms equated with the nine planets of astrology. The first, symbolized by Saturn, was a level for the purification of the souls. The second, Mercury's realm, gives us the ability to consider problems as a whole. The third of the nine soul realms is ruled by Earth and is associated with the Earthly pleasures. The fourth realm is where we find out about love and is ruled by Venus. The fifth realm is where we meet our limitations and is ruled by Mars. The sixth realm is ruled by Neptune, and is where we begin to use our creative powers and free ourselves from the material world. The seventh realm is symbolized by Jupiter, which strengthens the soul's ability to depict situations, to analyze people and places, things, and conditions. The eighth afterlife realm is ruled by Uranus and develops psychic ability. The ninth afterlife realm is symbolized by Pluto, the astrological realm of the unconscious. This afterlife realm is a transient place where souls can choose to travel to other realms or other solar systems, it is the soul’s liberation into eternity, and is the realm that opens the doorway from our solar system into the cosmos point of view. Mainstream Spiritualists postulate a series of seven realms that are not unlike Edgar Cayce's nine realms ruled by the planets. As it evolves, the soul moves higher and higher until it reaches the ultimate realm of spiritual oneness. The first realm, equated with hell, is the place where troubled souls spend a long time before they are compelled to move up to the next level. The second realm, where most souls move directly, is thought of as an intermediate transition between the lower planes of life and hell and the higher perfect realms of the universe. The third level is for those who have worked with their karmic inheritance. The fourth level is that from which evolved souls teach and direct those on Earth. The fifth level is where the soul leaves human consciousness behind. At the sixth plane, the soul is finally aligned with the cosmic consciousness and has no sense of separateness or individuality. Finally, the seventh level, the goal of each soul, is where the soul transcends its own sense of "soulfulness" and reunites with the World Soul and the universe. Taoism Taoism views life as an illusion and death as a transformation into immortality. Taoists believe that immortality of the soul can be achieved by living a virtuous life in harmony with the Tao. They are taught not to fear death, as it is simply part of nature. Traditional African religions Traditional African religions are diverse in their beliefs in an afterlife. Hunter-gatherer societies such as the Hadza have no particular belief in an afterlife, and the death of an individual is a straightforward end to their existence. Ancestor cults are found throughout Sub-Saharan Africa, including cultures like the Yombe, Beng, Yoruba and Ewe, "[T]he belief that the dead come back into life and are reborn into their families is given concrete expression in the personal names that are given to children....What is reincarnated are some of the dominant characteristics of the ancestor and not his soul. For each soul remains distinct and each birth represents a new soul." The Yoruba, Dogon and LoDagoa have eschatological ideas similar to Abrahamic religions, "but in most African societies, there is a marked absence of such clear-cut notions of heaven and hell, although there are notions of God judging the soul after death." In some societies like the Mende, multiple beliefs coexist. The Mende believe that people die twice: once during the process of joining the secret society, and again during biological death after which they become ancestors. However, some Mende also believe that after people are created by God they live ten consecutive lives, each in progressively descending worlds. One cross-cultural theme is that the ancestors are part of the world of the living, interacting with it regularly. Unitarian Universalism Some Unitarian Universalists believe in universalism: that all souls will ultimately be saved and that there are no torments of hell. Unitarian Universalists differ widely in their theology hence there is no exact same stance on the issue. Although Unitarians historically believed in a literal hell, and Universalists historically believed that everyone goes to heaven, modern Unitarian Universalists can be categorized into those believing in a heaven, reincarnation and oblivion. Most Unitarian Universalists believe that heaven and hell are symbolic places of consciousness and the faith is largely focused on the worldly life rather than any possible afterlife. Wicca The Wiccan afterlife is most commonly described as The Summerland. Here, souls rest, recuperate from life, and reflect on the experiences they had during their lives. After a period of rest, the souls are reincarnated, and the memory of their previous lives is erased. Many Wiccans see The Summerland as a place to reflect on their life actions. It is not a place of reward, but rather the end of a life journey at an end point of incarnations. Zoroastrianism Zoroastrianism states that the urvan, the disembodied spirit, lingers on earth for three days before departing downward to the kingdom of the dead that is ruled by Yima. For the three days that it rests on Earth, righteous souls sit at the head of their body, chanting the Ustavaiti Gathas with joy, while a wicked person sits at the feet of the corpse, wails and recites the Yasna. Zoroastrianism states that for the righteous souls, a beautiful maiden, which is the personification of the soul's good thoughts, words and deeds, appears. For a wicked person, a very old, ugly, naked hag appears. After three nights, the soul of the wicked is taken by the demon Vizaresa (Vīzarəša), to Chinvat bridge, and is made to go to darkness (hell). Yima is believed to have been the first king on earth to rule, as well as the first man to die. Inside of Yima's realm, the spirits live a shadowy existence, and are dependent on their own descendants which are still living on Earth. Their descendants are to satisfy their hunger and clothe them, through rituals done on earth. Rituals which are done on the first three days are vital and important, as they protect the soul from evil powers and give it strength to reach the underworld. After three days, the soul crosses Chinvat bridge which is the Final Judgment of the soul. Rashnu and Sraosha are present at the final judgment. The list is expanded sometimes, and include Vahman and Ormazd. Rashnu is the yazata who holds the scales of justice. If the good deeds of the person outweigh the bad, the soul is worthy of paradise. If the bad deeds outweigh the good, the bridge narrows down to the width of a blade-edge, and a horrid hag pulls the soul in her arms, and takes it down to hell with her. Misvan Gatu is the "place of the mixed ones" where the souls lead a gray existence, lacking both joy and sorrow. A soul goes here if his/her good deeds and bad deeds are equal, and Rashnu's scale is equal. Parapsychology The Society for Psychical Research was founded in 1882 with the express intention of investigating phenomena relating to Spiritualism and the afterlife. Its members continue to conduct scientific research on the paranormal to this day. Some of the earliest attempts to apply scientific methods to the study of phenomena relating to an afterlife were conducted by this organization. Its earliest members included noted scientists like William Crookes, and philosophers such as Henry Sidgwick and William James. Parapsychological investigation of the afterlife includes the study of haunting, apparitions of the deceased, instrumental trans-communication, electronic voice phenomena, and mediumship. A study conducted in 1901 by physician Duncan MacDougall sought to measure the weight lost by a human when the soul "departed the body" upon death. MacDougall weighed dying patients in an attempt to prove that the soul was material, tangible and thus measurable. Although MacDougall's results varied considerably from "21 grams", for some people this figure has become synonymous with the measure of a soul's mass. The title of the 2003 movie 21 Grams is a reference to MacDougall's findings. His results have never been reproduced, and are generally regarded either as meaningless or considered to have had little if any scientific merit. Frank Tipler has argued that physics can explain immortality, although such arguments are not falsifiable and, in Karl Popper's views, they do not qualify as science. After 25 years of parapsychological research Susan Blackmore came to the conclusion that, according to her experiences, there is not enough empirical evidence for many of these cases. Mediumship Mediums purportedly act as a vessel for communications from spirits in other realms. Mediumship is not specific to one culture or religion; it can be identified in several belief systems, most notably Spiritualism. While the practice gained popularity in Europe and North America in the 19th century, evidence of mediumship dates back thousands of years in Asia. Mediums who claim to have contact with deceased people include Tyler Henry and Pascal Voggenhuber. Near death research Research also includes the study of the near death experience. Scientists who have worked in this area include Elisabeth Kübler-Ross, Raymond Moody, Sam Parnia, Michael Sabom, Bruce Greyson, Peter Fenwick, Jeffrey Long, Susan Blackmore, Charles Tart, William James, Ian Stevenson, Michael Persinger, Pim van Lommel, Penny Sartori, Walter van Laack among others. Past life regression Past life regression is a method that uses hypnosis to recover what practitioners believe are memories of past lives or incarnations. The technique used during past-life regression involves the subject answering a series of questions while hypnotized to reveal identity and events of alleged past lives, a method similar to that used in recovered memory therapy and one that, similarly, often misrepresents memory as a faithful recording of previous events rather than a constructed set of recollections. However, medical experts and practitioners do not agree that the past life memories gained from past life regressions are truly from past lives; experts generally regard claims of recovered memories of past lives as fantasies or delusions or a type of confabulation, because the use of hypnosis and suggestive questions can tend to leave the subject particularly likely to hold distorted or false memories. Philosophy Modern philosophy There is a view based on the philosophical question of personal identity, termed open individualism by Daniel Kolak, that concludes that individual conscious experience is illusory, and because consciousness continues after death in all conscious beings, you do not die. This position has allegedly been supported by physicists such as Erwin Schrödinger and Freeman Dyson. Certain problems arise with the idea of a particular person continuing after death. Peter van Inwagen, in his argument regarding resurrection, notes that the materialist must have some sort of physical continuity. John Hick also raises questions regarding personal identity in his book, Death and Eternal Life, using an example of a person ceasing to exist in one place while an exact replica appears in another. If the replica had all the same experiences, traits, and physical appearances of the first person, we would all attribute the same identity to the second, according to Hick. Process philosophy In the panentheistic model of process philosophy and theology the writers Alfred North Whitehead and Charles Hartshorne rejected the idea that the universe was made of substance, instead saying reality is composed of living experiences (occasions of experience). According to Hartshorne people do not experience subjective (or personal) immortality in the afterlife, but they do have objective immortality because their experiences live on forever in God, who contains all that was. However other process philosophers such as David Ray Griffin have written that people may have subjective experience after death. Science Psychological proposals for the origin of a belief in an afterlife include cognitive disposition, cultural learning, and as an intuitive religious idea. In 2008, a large-scale study conducted by the University of Southampton involving 2060 patients from 15 hospitals in the United Kingdom, United States and Austria was launched. The AWARE (AWAreness during REsuscitation) study examined the broad range of mental experiences in relation to death. In a large study, researchers also tested the validity of conscious experiences for the first time using objective markers, to determine whether claims of awareness compatible with out-of-body experiences correspond with real or hallucinatory events. The results revealed that 40% of those who survived a cardiac arrest were aware during the time that they were clinically dead and before their hearts were restarted. One patient also had a verified out-of-body experience (over 80% of patients did not survive their cardiac arrest or were too sick to be interviewed), but his cardiac arrest occurred in a room without markers. Dr. Parnia in the interview stated, "The evidence thus far suggests that in the first few minutes after death, consciousness is not annihilated." The AWARE study drew the following primary conclusions: In some cases of cardiac arrest, memories of visual awareness compatible with so called out-of-body experiences may correspond with actual events. A number of NDErs may have vivid death experiences, but do not recall them due to the effects of brain injury or sedative drugs on memory circuits. The recalled experience surrounding death merits a genuine investigation without prejudice. Studies have also been done on the widely reported phenomenon of near death experiences (NDE). Experiencers commonly report being transported to a different "realm" or "plane of existence" and they have been shown to display a lasting positive aftereffect on most experiencers. See also Allegory of the long spoons Astral Plane Bardo Brig of Dread (Bridge of Dread) Empiricism Epistemology Eternal oblivion Exaltation (Mormonism) Fate of the unlearned Heaven Rebecca Hensler Hell Immortality Mictlan Mind uploading Nirvana Omega Point Paradise Phowa Pre-existence Purgatory Rebirth Reincarnation Soul Soul flight Soul retrieval Spiritism Suspended animation Spirit World Undead Underworld References Explanatory notes Citations Bibliography Philip C Almond, Afterlife: A History of Life after Death, London and Ithaca NY: I.B. Tauris and Cornell University Press, 2015. Campbell, Douglas R. "Plato's Theory of Reincarnation: Eschatology and Natural Philosophy," Review of Metaphysics 75 (4): 643–665. 2022. Dan Cohn-Sherbok and Christopher Lewis, (eds.), Beyond Death: Theological and Philosophical Reflections on Life after Death, Pelgrave-MacMillan, 1995. David Fontana, Is there an afterlife: a comprehensive overview of the evidence, O Books 2005. Jane Idelman Smith and Yazbeck Haddad, The Islamic Understanding of Death and Resurrection. Oxford UP, 2002. Michael Martin and Keith Augustine (eds.), The Myth of an Afterlife: The Case against Life After Death, Rowman & Littlefield, 2015. . John J. McGraw, Brain & Belief: An Exploration of the Human Soul, Aegis Press, 2004. Mark Mirabello, A Traveler's Guide to the Afterlife: Traditions and Beliefs on Death, Dying, and What Lies Beyond, Inner Traditions. 2016. Christopher M. Moreman, Beyond the Threshold: Afterlife Beliefs and Experiences in World Religions, Rowman & Littlefield, 2008. Robert A. Morey, Death and the Afterlife, Minneapolis, Minn.: Bethany House Publishers, 1984. 315 p. Hiroshi Obayashi (ed.), Death and Afterlife: Perspectives of World Religions, Praeger, 1991. Alan F. Segal, Life After Death: A History of the Afterlife in Western Religion, Doubleday, 2004. Gregory Shushan, Conceptions of the Afterlife in Early Civilizations: Universalism, Constructivism and Near-Death Experience, New York & London, Continuum, 2009. . Further reading (Extensive 1878 text by William Rounseville Alger) External links Vatican.va: Catechism of the Catholic Church Islamic Guide: Life After Death Judaism 101: Olam Ha-Ba: The Afterlife Stewart Salmond, Christian Doctrine of Immortality Dictionary of the History of Ideas: "Death and Immortality" Online searchable edition of Swedenborg's Heaven and Hell (Swedenborg Foundation 2000) Collection: Heaven, Hell, and Afterlives from the University of Michigan Museum of Art Philosophy of religion Religious belief and doctrine

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https://en.wikipedia.org/wiki/Amber%20Diceless%20Roleplaying%20Game

Amber Diceless Roleplaying Game

The Amber Diceless Roleplaying Game is a role-playing game created and written by Erick Wujcik, set in the fictional universe created by author Roger Zelazny for his Chronicles of Amber. The game is unusual in that no dice are used in resolving conflicts or player actions; instead a simple diceless system of comparative ability, and narrative description of the action by the players and gamemaster, is used to determine how situations are resolved. Amber DRPG was created in the 1980s, and is much more focused on relationships and roleplaying than most of the roleplaying games of that era. Most Amber characters are members of the two ruling classes in the Amber multiverse, and are much more advanced in matters of strength, endurance, psyche, warfare and sorcery than ordinary beings. This often means that the only individuals who are capable of opposing a character are from his or her family, a fact that leads to much suspicion and intrigue. History Erick Wujcik wanted to design a role-playing game based on Amber for West End Games, and they agreed to look at his work. Wujcik intended to integrate the feel of the Amber setting from the novels into a role-playing game, and playtested his system for a few months at the Michigan Gaming Center where he decided to try it out as a diceless game. West End Games was not interested in a diceless role-playing game, so Wujcik acquired the role-playing game rights to Amber and offered the game to R. Talsorian Games, until he withdrew over creative differences. Wujcik then founded Phage Press, and published Amber Diceless Role-playing in 1991. The original 256-page game book was published in 1991 by Phage Press, covering material from the first five novels (the "Corwin Cycle") and some details – sorcery and the Logrus – from the remaining five novels (the "Merlin Cycle"), in order to allow players to roleplay characters from the Courts of Chaos. Some details were changed slightly to allow more player choice – for example, players can be full Trump Artists without having walked the Pattern or the Logrus, which Merlin says is impossible; and players' psychic abilities are far greater than those shown in the books. A 256-page companion volume, Shadow Knight, was published in 1993. This supplemental rule book includes the remaining elements from the Merlin novels, such as Broken Patterns, and allows players to create Constructs such as Merlin's Ghostwheel. The book presents the second series of novels not as additions to the series' continuity but as an example of a roleplaying campaign with Merlin, Luke, Julia, Jurt and Coral as the PCs. The remainder of the book is a collection of essays on the game, statistics for the new characters and an update of the older ones in light of their appearance in the second series, and (perhaps most usefully for GMs) plot summaries of each of the ten books. The book includes some material from the short story "The Salesman's Tale," and some unpublished material cut from Prince of Chaos, notably Coral's pregnancy by Merlin. Both books were translated into French and published by Jeux Descartes in 1994 and 1995. A third book, Rebma, was promised. Cover art was commissioned and pre-orders were taken, but it was never published. Wujcik also expressed a desire to create a book giving greater detail to the Courts of Chaos. The publishing rights to the Amber DRPG games were acquired in 2004 by Guardians of Order, who took over sales of the game and announced their intention to release a new edition of the game. However, no new edition was released before Guardians of Order went out of business in 2006. The two existing books are now out-of-print, but they have been made available as PDF downloads. In June 2007 a new publishing company, headed by Edwin Voskamp and Eric Todd, was formed with the express purpose of bringing Amber DRPG back into print. The new company is named Diceless by Design. In May 2010, Rite Publishing secured a license from Diceless by Design to use the rules system with a new setting in the creation of a new product to be written by industry and system veteran Jason Durall. The project Lords of Gossamer & Shadow (Diceless) was funded via Kickstarter in May 2013. In Sept 2013 the project was completed, and on in Nov 2013 Lords of Gossamer and Shadow (Diceless) was released publicly in full-color Print and PDF, along with additional supplements and continued support. Setting The game is set in the multiverse described in Zelazny's Chronicles of Amber. The first book assumes that gamemasters will set their campaigns after the Patternfall war; that is, after the end of the fifth book in the series, The Courts of Chaos, but uses material from the following books to describe those parts of Zelazny's cosmology that were featured there in more detail. The Amber multiverse consists of Amber, a city at one pole of the universe wherein is found the Pattern, the symbol of Order; The Courts of Chaos, an assembly of worlds at the other pole where can be found the Logrus, the manifestation of Chaos, and the Abyss, the source or end of all reality; and Shadow, the collection of all possible universes (shadows) between and around them. Inhabitants of either pole can use one or both of the Pattern and the Logrus to travel through Shadow. It is assumed that players will portray the children of the main characters from the books – the ruling family of Amber, known as the Elder Amberites – or a resident of the Courts. However, since some feel that being the children of the main characters is too limiting, it is fairly common to either start with King Oberon's death before the book begins and roleplay the Elder Amberites as they vie for the throne; or to populate Amber from scratch with a different set of Elder Amberites. The former option is one presented in the book; the latter is known in the Amber community as an "Amethyst" game. A third option is to have the players portray Corwin's children, in an Amber-like city built around Corwin's pattern; this is sometimes called an "Argent" game, since one of Corwin's heraldic colours is Silver. System Attributes Characters in Amber DRPG are represented by four attributes: Psyche, Strength, Endurance and Warfare. Psyche is used for feats of willpower or magic Strength is used for feats of strength or unarmed combat Endurance is used for feats of endurance Warfare is used for armed combat, from duelling to commanding armies The attributes run from −25 (normal human level), through −10 (normal level for a denizen of the Courts of Chaos) and 0 (normal level for an inhabitant of Amber), upwards without limit. Scores above 0 are "ranked", with the highest score being ranked 1st, the next-highest 2nd, and so on. The character with 1st rank in each attribute is considered "superior" in that attribute, being considered to be substantially better than the character with 2nd rank even if the difference in scores is small. All else being equal, a character with a higher rank in an attribute will always win a contest based on that attribute. The Attribute Auction A character's ability scores are purchased during character creation in an auction; players get 100 character points, and bid on each attribute in turn. The character who bids the most for an attribute is "ranked" first and is considered superior to all other characters in that attribute. Unlike conventional auctions, bids are non-refundable; if one player bids 65 for psyche and another wins with a bid of 66, then the character with 66 is "superior" to the character with 65 even though there is only one bid difference. Instead, lower bidding characters are ranked in ascending order according to how much they have bid, the characters becoming progressively weaker in that attribute as they pay less for it. After the auction, players can secretly pay extra points to raise their ranks, but they can only pay to raise their scores to an existing rank. Further, a character with a bid-for rank is considered to have a slight advantage over character with a bought-up rank. The Auction simulates a 'history' of competition between the descendants of Oberon for player characters who have not had dozens of decades to get to know each other. Through the competitive Auction, characters may begin the game vying for standings. The auction serves to introduce some unpredictability into character creation without the need to resort to dice, cards, or other randomizing devices. A player may intend, for example, to create a character who is a strong, mighty warrior, but being "outplayed" in the auction may result in lower attribute scores than anticipated, therefore necessitating a change of character concept. Since a player cannot control another player's bids, and since all bids are non-refundable, the auction involves a considerable amount of strategizing and prioritization by players. A willingness to spend as many points as possible on an attribute may improve your chances of a high ranking, but too reckless a spending strategy could leave a player with few points to spend on powers and objects. In a hotly contested auction, such as for the important attribute of warfare, the most valuable skill is the ability to force one's opponents to back down. With two or more equally determined players, this can result in a "bidding war," in which the attribute is driven up by increments to large sums. An alternative strategy is to try to cow other players into submission with a high opening bid. Most players bid low amounts between one and ten points in an initial bid in order to feel out the competition and to save points for other uses. A high enough opening bid could signal a player's determination to be first ranked in that attribute, thereby dissuading others from competing. Psyche in Amber DRPG compared to the Chronicles Characters with high psyche are presented as having strong telepathic abilities, being able to hypnotise and even mentally dominate any character with lesser psyche with whom they can make eye-contact. This is likely due to three scenes in the Chronicles: first, when Eric paralyzes Corwin with an attack across the Trump and refuses to desist because one or the other would be dominated; second, when Corwin faces the demon Strygalldwir, it is able to wrestle mentally with him when their gazes meet; and third, when Fiona is able to keep Brand immobile in the final battle at the Courts of Chaos. However, in general, the books only feature mental battles when there is some reason for mind-to-mind contact (for example, Trump contact) and magic or Trump is involved in all three of the above conflicts, so it is not clear whether Zelazny intended his characters to have such a power; the combination of Brand's "living trump" powers and his high Psyche (as presented in the roleplaying game) would have guaranteed him victory over Corwin. Shadow Knight does address this inconsistency somewhat, by presenting the "living trump" abilities as somewhat limited. Powers Characters in Amber DRPG have access to the powers seen in the Chronicles of Amber: Pattern, Logrus, Shape-shifting, Trump, and magic. Pattern: A character who has walked the pattern can walk in shadow to any possible universe, and while there can manipulate probability. Logrus: A character who has mastered the Logrus can send out Logrus tendrils and pull themselves or objects through shadow. Shape-shifting: Shape-shifters can alter their physical form and abilities. Trump: Trump Artists can create Trumps, a sort of tarot card which allows mental communication and travel. The book features Trump portraits of each of the elder Amberites. The trump picture of Corwin is executed in a subtly different style – and has features very similar to Roger Zelazny's. Magic: Three types of magic are detailed: Power Words, with a quick, small effect; Sorcery, with pre-prepared spells as in many other game systems; and Conjuration, the creation of small objects. Each of the first four powers is available in an advanced form. Artifacts, Personal shadows and Constructs While a character with Pattern, Logrus or Conjuration can acquire virtually any object, players can choose to spend character points to obtain objects with particular virtues – unbreakability, or a mind of their own. Since they have paid points for the items, they are a part of the character's legend, and cannot lightly be destroyed. Similarly, a character can find any possible universe, but they can spend character points to know of or inhabit shadows which are (in some sense) "real" and therefore useful. The expansion, Shadow Knight, adds Constructs – artifacts with connections to shadows. Stuff Unspent character points become good stuff – a good luck for the character. Players are also allowed to overspend (in moderation), with the points becoming bad stuff – bad luck which the Gamemaster should inflict on the character. Stuff governs how non-player characters perceive and respond to the character: characters with good stuff will often receive friendly or helpful reactions, while characters with bad stuff are often treated with suspicion or hostility. As well as representing luck, stuff can be seen as representing a character's outlook on the universe: characters with good stuff seeing the multiverse as a cheerful place, while characters with bad stuff see it as hostile. Conflict resolution In any given fair conflict between two characters, the character with the higher score in the relevant attribute will eventually win. The key words here are fair and eventually – if characters' ranks are close, and the weaker character has obtained some advantage, then the weaker character can escape defeat or perhaps prevail. Close ranks result in longer contests while greater difference between ranks result in fast resolution. Alternatively, if characters' attribute ranks are close, the weaker character can try to change the relevant attribute by changing the nature of the conflict. For example, if two characters are wrestling the relevant attribute is Strength; a character could reveal a weapon, changing it to Warfare; they could try to overcome the other character's mind using a power, changing it to Psyche; or they could concentrate their strength on defense, changing it to Endurance. If there is a substantial difference between characters' ranks, the conflict is generally over before the weaker character can react. The "Golden Rule" Amber DRPG advises gamemasters to change rules as they see fit, even to the point of adding or removing powers or attributes. Reception In the June 1992 edition of Dragon (Issue 182), both Lester Smith and Allen Varney published reviews of this game. Smith admired the professional production qualities of the 256-page rulebook, noting that because it was Smyth sewn in 32-page signatures, the book would always lie flat when opened. However, he found the typeface difficult to read, and the lack a coherent hierarchy of rules increased the reading difficulty as well. Smith admired the Attribute Auction and point-buy system for skills, and the focus on roleplaying in place of dice-rolling, but he mused that all of the roleplaying would mean "GMs have to spend quite a bit of time and creative effort coming up with wide-reaching plots for their players to work through. Canned, linear adventures just won't serve." He concluded by stating that the diceless system is not for every gamer: "As impressed as I am with the game, do I think it is the 'end-all' of role-playing games, or that diceless systems are the wave of the future? I'll give a firm “No” on both counts... However, I certainly do think that the Amber Diceless Roleplaying Game is destined for great popularity and a niche among the most respected of role-playing game designs." Allen Varney thought the "Attribute Auction" to be "brilliant and elegant", but he wondered if character advancement was perhaps too slow to keep marginal players interested. He also believed that being a gamemaster would be "tough work. Proceed with caution." Varney recommended that players need some familiarity with the first five "Amber" novels by Zelazny. He concluded, "The intensity of the Amber game indicates [game designer Erik ] Wujcik is on to something. When success in every action depends on the role and not the roll, players develop a sense of both control and urgency, along with creativity that borders on mania." In Issue 65 of Challenge, Dirk DeJong had a good first impression of the game, especially the information provided about the Amber family members and their various flaws and strengths. However he found that "The biggest problem with this endeavor, and its downfall, is the nature of the conflict systems. First, they are diceless, really diceless, and don't involve any sort of random factors at all, aside from those that you can introduce by roleplaying them out. Thus, if you get involved with a character who's better than you at sword-fighting, even if only by one point out of 100, you're pretty much dead meat, unless you can act your way out." DeJong also disagreed with the suggestion that if the referee and players disagreed with a rule to simply remove it from the game. "I thought the entire idea of using rules and random results was to prevent the type of arguments that I can see arising from this setup." DeJong concluded on an ambivalent note, saying, "If you love Zelazny and the Amber series, jump on it, as this is the premier sourcebook for running an Amber campaign. [...] Personally, I just can't get turned on by a system that expects me to either be content with a simple subtraction of numbers to find out who won, or to describe an entire combat blow by blow, just so that I can attempt some trick to win." Loyd Blankenship reviewed Amber in Pyramid #2 (July/Aug., 1993), and stated that "Amber is a valuable resource to a GM - even if he isn't running an Amber game. For gamers who have an aspiring actor or actress lurking within their breast, or for someone running a campaign via electronic mail or message base, Amber should be given serious consideration." Community Despite the game's out-of-print status, a thriving convention scene exists supporting the game. Amber conventions, known as Ambercons, are held yearly in Massachusetts, Michigan, Portland (United States), Milton Keynes (England), Belfast (Northern Ireland) and Modena, Italy. Additionally, Phage Press published 12 volumes of a dedicated Amber DRPG magazine called Amberzine. Some Amberzine issues are still available from Phage Press. References Review External links The Official Amber DRPG and Erick Wujcik Forum The Official Amber DRPG and Erick Wujcik Forum (This site is no longer live) The Chronicles of Amber Fantasy role-playing games Role-playing games based on novels American role-playing games Role-playing games introduced in 1991 Role-playing game systems

1187

https://en.wikipedia.org/wiki/Alloy

Alloy

An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opacity, and luster, but may have properties that differ from those of the pure metals, such as increased strength or hardness. In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. In an alloy, the atoms are joined by metallic bonding rather than by covalent bonds typically found in chemical compounds. The alloy constituents are usually measured by mass percentage for practical applications, and in atomic fraction for basic science studies. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy. They can be further classified as homogeneous (consisting of a single phase), or heterogeneous (consisting of two or more phases) or intermetallic. An alloy may be a solid solution of metal elements (a single phase, where all metallic grains (crystals) are of the same composition) or a mixture of metallic phases (two or more solutions, forming a microstructure of different crystals within the metal). Examples of alloys include red gold (gold and copper), white gold (gold and silver), sterling silver (silver and copper), steel or silicon steel (iron with non-metallic carbon or silicon respectively), solder, brass, pewter, duralumin, bronze, and amalgams. Alloys are used in a wide variety of applications, from the steel alloys, used in everything from buildings to automobiles to surgical tools, to exotic titanium alloys used in the aerospace industry, to beryllium-copper alloys for non-sparking tools. Characteristics An alloy is a mixture of chemical elements, which forms an impure substance (admixture) that retains the characteristics of a metal. An alloy is distinct from an impure metal in that, with an alloy, the added elements are well controlled to produce desirable properties, while impure metals such as wrought iron are less controlled, but are often considered useful. Alloys are made by mixing two or more elements, at least one of which is a metal. This is usually called the primary metal or the base metal, and the name of this metal may also be the name of the alloy. The other constituents may or may not be metals but, when mixed with the molten base, they will be soluble and dissolve into the mixture. The mechanical properties of alloys will often be quite different from those of its individual constituents. A metal that is normally very soft (malleable), such as aluminium, can be altered by alloying it with another soft metal, such as copper. Although both metals are very soft and ductile, the resulting aluminium alloy will have much greater strength. Adding a small amount of non-metallic carbon to iron trades its great ductility for the greater strength of an alloy called steel. Due to its very-high strength, but still substantial toughness, and its ability to be greatly altered by heat treatment, steel is one of the most useful and common alloys in modern use. By adding chromium to steel, its resistance to corrosion can be enhanced, creating stainless steel, while adding silicon will alter its electrical characteristics, producing silicon steel. Like oil and water, a molten metal may not always mix with another element. For example, pure iron is almost completely insoluble with copper. Even when the constituents are soluble, each will usually have a saturation point, beyond which no more of the constituent can be added. Iron, for example, can hold a maximum of 6.67% carbon. Although the elements of an alloy usually must be soluble in the liquid state, they may not always be soluble in the solid state. If the metals remain soluble when solid, the alloy forms a solid solution, becoming a homogeneous structure consisting of identical crystals, called a phase. If as the mixture cools the constituents become insoluble, they may separate to form two or more different types of crystals, creating a heterogeneous microstructure of different phases, some with more of one constituent than the other. However, in other alloys, the insoluble elements may not separate until after crystallization occurs. If cooled very quickly, they first crystallize as a homogeneous phase, but they are supersaturated with the secondary constituents. As time passes, the atoms of these supersaturated alloys can separate from the crystal lattice, becoming more stable, and forming a second phase that serves to reinforce the crystals internally. Some alloys, such as electrum—an alloy of silver and gold—occur naturally. Meteorites are sometimes made of naturally occurring alloys of iron and nickel, but are not native to the Earth. One of the first alloys made by humans was bronze, which is a mixture of the metals tin and copper. Bronze was an extremely useful alloy to the ancients, because it is much stronger and harder than either of its components. Steel was another common alloy. However, in ancient times, it could only be created as an accidental byproduct from the heating of iron ore in fires (smelting) during the manufacture of iron. Other ancient alloys include pewter, brass and pig iron. In the modern age, steel can be created in many forms. Carbon steel can be made by varying only the carbon content, producing soft alloys like mild steel or hard alloys like spring steel. Alloy steels can be made by adding other elements, such as chromium, molybdenum, vanadium or nickel, resulting in alloys such as high-speed steel or tool steel. Small amounts of manganese are usually alloyed with most modern steels because of its ability to remove unwanted impurities, like phosphorus, sulfur and oxygen, which can have detrimental effects on the alloy. However, most alloys were not created until the 1900s, such as various aluminium, titanium, nickel, and magnesium alloys. Some modern superalloys, such as incoloy, inconel, and hastelloy, may consist of a multitude of different elements. An alloy is technically an impure metal, but when referring to alloys, the term impurities usually denotes undesirable elements. Such impurities are introduced from the base metals and alloying elements, but are removed during processing. For instance, sulfur is a common impurity in steel. Sulfur combines readily with iron to form iron sulfide, which is very brittle, creating weak spots in the steel. Lithium, sodium and calcium are common impurities in aluminium alloys, which can have adverse effects on the structural integrity of castings. Conversely, otherwise pure-metals that contain unwanted impurities are often called "impure metals" and are not usually referred to as alloys. Oxygen, present in the air, readily combines with most metals to form metal oxides; especially at higher temperatures encountered during alloying. Great care is often taken during the alloying process to remove excess impurities, using fluxes, chemical additives, or other methods of extractive metallurgy. Theory Alloying a metal is done by combining it with one or more other elements. The most common and oldest alloying process is performed by heating the base metal beyond its melting point and then dissolving the solutes into the molten liquid, which may be possible even if the melting point of the solute is far greater than that of the base. For example, in its liquid state, titanium is a very strong solvent capable of dissolving most metals and elements. In addition, it readily absorbs gases like oxygen and burns in the presence of nitrogen. This increases the chance of contamination from any contacting surface, and so must be melted in vacuum induction-heating and special, water-cooled, copper crucibles. However, some metals and solutes, such as iron and carbon, have very high melting-points and were impossible for ancient people to melt. Thus, alloying (in particular, interstitial alloying) may also be performed with one or more constituents in a gaseous state, such as found in a blast furnace to make pig iron (liquid-gas), nitriding, carbonitriding or other forms of case hardening (solid-gas), or the cementation process used to make blister steel (solid-gas). It may also be done with one, more, or all of the constituents in the solid state, such as found in ancient methods of pattern welding (solid-solid), shear steel (solid-solid), or crucible steel production (solid-liquid), mixing the elements via solid-state diffusion. By adding another element to a metal, differences in the size of the atoms create internal stresses in the lattice of the metallic crystals; stresses that often enhance its properties. For example, the combination of carbon with iron produces steel, which is stronger than iron, its primary element. The electrical and thermal conductivity of alloys is usually lower than that of the pure metals. The physical properties, such as density, reactivity, Young's modulus of an alloy may not differ greatly from those of its base element, but engineering properties such as tensile strength, ductility, and shear strength may be substantially different from those of the constituent materials. This is sometimes a result of the sizes of the atoms in the alloy, because larger atoms exert a compressive force on neighboring atoms, and smaller atoms exert a tensile force on their neighbors, helping the alloy resist deformation. Sometimes alloys may exhibit marked differences in behavior even when small amounts of one element are present. For example, impurities in semiconducting ferromagnetic alloys lead to different properties, as first predicted by White, Hogan, Suhl, Tian Abrie and Nakamura. Unlike pure metals, most alloys do not have a single melting point, but a melting range during which the material is a mixture of solid and liquid phases (a slush). The temperature at which melting begins is called the solidus, and the temperature when melting is just complete is called the liquidus. For many alloys there is a particular alloy proportion (in some cases more than one), called either a eutectic mixture or a peritectic composition, which gives the alloy a unique and low melting point, and no liquid/solid slush transition. Heat treatment Alloying elements are added to a base metal, to induce hardness, toughness, ductility, or other desired properties. Most metals and alloys can be work hardened by creating defects in their crystal structure. These defects are created during plastic deformation by hammering, bending, extruding, et cetera, and are permanent unless the metal is recrystallized. Otherwise, some alloys can also have their properties altered by heat treatment. Nearly all metals can be softened by annealing, which recrystallizes the alloy and repairs the defects, but not as many can be hardened by controlled heating and cooling. Many alloys of aluminium, copper, magnesium, titanium, and nickel can be strengthened to some degree by some method of heat treatment, but few respond to this to the same degree as does steel. The base metal iron of the iron-carbon alloy known as steel, undergoes a change in the arrangement (allotropy) of the atoms of its crystal matrix at a certain temperature (usually between and , depending on carbon content). This allows the smaller carbon atoms to enter the interstices of the iron crystal. When this diffusion happens, the carbon atoms are said to be in solution in the iron, forming a particular single, homogeneous, crystalline phase called austenite. If the steel is cooled slowly, the carbon can diffuse out of the iron and it will gradually revert to its low temperature allotrope. During slow cooling, the carbon atoms will no longer be as soluble with the iron, and will be forced to precipitate out of solution, nucleating into a more concentrated form of iron carbide (Fe3C) in the spaces between the pure iron crystals. The steel then becomes heterogeneous, as it is formed of two phases, the iron-carbon phase called cementite (or carbide), and pure iron ferrite. Such a heat treatment produces a steel that is rather soft. If the steel is cooled quickly, however, the carbon atoms will not have time to diffuse and precipitate out as carbide, but will be trapped within the iron crystals. When rapidly cooled, a diffusionless (martensite) transformation occurs, in which the carbon atoms become trapped in solution. This causes the iron crystals to deform as the crystal structure tries to change to its low temperature state, leaving those crystals very hard but much less ductile (more brittle). While the high strength of steel results when diffusion and precipitation is prevented (forming martensite), most heat-treatable alloys are precipitation hardening alloys, that depend on the diffusion of alloying elements to achieve their strength. When heated to form a solution and then cooled quickly, these alloys become much softer than normal, during the diffusionless transformation, but then harden as they age. The solutes in these alloys will precipitate over time, forming intermetallic phases, which are difficult to discern from the base metal. Unlike steel, in which the solid solution separates into different crystal phases (carbide and ferrite), precipitation hardening alloys form different phases within the same crystal. These intermetallic alloys appear homogeneous in crystal structure, but tend to behave heterogeneously, becoming hard and somewhat brittle. In 1906, precipitation hardening alloys were discovered by Alfred Wilm. Precipitation hardening alloys, such as certain alloys of aluminium, titanium, and copper, are heat-treatable alloys that soften when quenched (cooled quickly), and then harden over time. Wilm had been searching for a way to harden aluminium alloys for use in machine-gun cartridge cases. Knowing that aluminium-copper alloys were heat-treatable to some degree, Wilm tried quenching a ternary alloy of aluminium, copper, and the addition of magnesium, but was initially disappointed with the results. However, when Wilm retested it the next day he discovered that the alloy increased in hardness when left to age at room temperature, and far exceeded his expectations. Although an explanation for the phenomenon was not provided until 1919, duralumin was one of the first "age hardening" alloys used, becoming the primary building material for the first Zeppelins, and was soon followed by many others. Because they often exhibit a combination of high strength and low weight, these alloys became widely used in many forms of industry, including the construction of modern aircraft. Mechanisms When a molten metal is mixed with another substance, there are two mechanisms that can cause an alloy to form, called atom exchange and the interstitial mechanism. The relative size of each element in the mix plays a primary role in determining which mechanism will occur. When the atoms are relatively similar in size, the atom exchange method usually happens, where some of the atoms composing the metallic crystals are substituted with atoms of the other constituent. This is called a substitutional alloy. Examples of substitutional alloys include bronze and brass, in which some of the copper atoms are substituted with either tin or zinc atoms respectively. In the case of the interstitial mechanism, one atom is usually much smaller than the other and can not successfully substitute for the other type of atom in the crystals of the base metal. Instead, the smaller atoms become trapped in the interstitial sites between the atoms of the crystal matrix. This is referred to as an interstitial alloy. Steel is an example of an interstitial alloy, because the very small carbon atoms fit into interstices of the iron matrix. Stainless steel is an example of a combination of interstitial and substitutional alloys, because the carbon atoms fit into the interstices, but some of the iron atoms are substituted by nickel and chromium atoms. History and examples Meteoric iron The use of alloys by humans started with the use of meteoric iron, a naturally occurring alloy of nickel and iron. It is the main constituent of iron meteorites. As no metallurgic processes were used to separate iron from nickel, the alloy was used as it was. Meteoric iron could be forged from a red heat to make objects such as tools, weapons, and nails. In many cultures it was shaped by cold hammering into knives and arrowheads. They were often used as anvils. Meteoric iron was very rare and valuable, and difficult for ancient people to work. Bronze and brass Iron is usually found as iron ore on Earth, except for one deposit of native iron in Greenland, which was used by the Inuit. Native copper, however, was found worldwide, along with silver, gold, and platinum, which were also used to make tools, jewelry, and other objects since Neolithic times. Copper was the hardest of these metals, and the most widely distributed. It became one of the most important metals to the ancients. Around 10,000 years ago in the highlands of Anatolia (Turkey), humans learned to smelt metals such as copper and tin from ore. Around 2500 BC, people began alloying the two metals to form bronze, which was much harder than its ingredients. Tin was rare, however, being found mostly in Great Britain. In the Middle East, people began alloying copper with zinc to form brass. Ancient civilizations took into account the mixture and the various properties it produced, such as hardness, toughness and melting point, under various conditions of temperature and work hardening, developing much of the information contained in modern alloy phase diagrams. For example, arrowheads from the Chinese Qin dynasty (around 200 BC) were often constructed with a hard bronze-head, but a softer bronze-tang, combining the alloys to prevent both dulling and breaking during use. Amalgams Mercury has been smelted from cinnabar for thousands of years. Mercury dissolves many metals, such as gold, silver, and tin, to form amalgams (an alloy in a soft paste or liquid form at ambient temperature). Amalgams have been used since 200 BC in China for gilding objects such as armor and mirrors with precious metals. The ancient Romans often used mercury-tin amalgams for gilding their armor. The amalgam was applied as a paste and then heated until the mercury vaporized, leaving the gold, silver, or tin behind. Mercury was often used in mining, to extract precious metals like gold and silver from their ores. Precious metals Many ancient civilizations alloyed metals for purely aesthetic purposes. In ancient Egypt and Mycenae, gold was often alloyed with copper to produce red-gold, or iron to produce a bright burgundy-gold. Gold was often found alloyed with silver or other metals to produce various types of colored gold. These metals were also used to strengthen each other, for more practical purposes. Copper was often added to silver to make sterling silver, increasing its strength for use in dishes, silverware, and other practical items. Quite often, precious metals were alloyed with less valuable substances as a means to deceive buyers. Around 250 BC, Archimedes was commissioned by the King of Syracuse to find a way to check the purity of the gold in a crown, leading to the famous bath-house shouting of "Eureka!" upon the discovery of Archimedes' principle. Pewter The term pewter covers a variety of alloys consisting primarily of tin. As a pure metal, tin is much too soft to use for most practical purposes. However, during the Bronze Age, tin was a rare metal in many parts of Europe and the Mediterranean, so it was often valued higher than gold. To make jewellery, cutlery, or other objects from tin, workers usually alloyed it with other metals to increase strength and hardness. These metals were typically lead, antimony, bismuth or copper. These solutes were sometimes added individually in varying amounts, or added together, making a wide variety of objects, ranging from practical items such as dishes, surgical tools, candlesticks or funnels, to decorative items like ear rings and hair clips. The earliest examples of pewter come from ancient Egypt, around 1450 BC. The use of pewter was widespread across Europe, from France to Norway and Britain (where most of the ancient tin was mined) to the Near East. The alloy was also used in China and the Far East, arriving in Japan around 800 AD, where it was used for making objects like ceremonial vessels, tea canisters, or chalices used in shinto shrines. Iron The first known smelting of iron began in Anatolia, around 1800 BC. Called the bloomery process, it produced very soft but ductile wrought iron. By 800 BC, iron-making technology had spread to Europe, arriving in Japan around 700 AD. Pig iron, a very hard but brittle alloy of iron and carbon, was being produced in China as early as 1200 BC, but did not arrive in Europe until the Middle Ages. Pig iron has a lower melting point than iron, and was used for making cast-iron. However, these metals found little practical use until the introduction of crucible steel around 300 BC. These steels were of poor quality, and the introduction of pattern welding, around the 1st century AD, sought to balance the extreme properties of the alloys by laminating them, to create a tougher metal. Around 700 AD, the Japanese began folding bloomery-steel and cast-iron in alternating layers to increase the strength of their swords, using clay fluxes to remove slag and impurities. This method of Japanese swordsmithing produced one of the purest steel-alloys of the ancient world. While the use of iron started to become more widespread around 1200 BC, mainly because of interruptions in the trade routes for tin, the metal was much softer than bronze. However, very small amounts of steel, (an alloy of iron and around 1% carbon), was always a byproduct of the bloomery process. The ability to modify the hardness of steel by heat treatment had been known since 1100 BC, and the rare material was valued for the manufacture of tools and weapons. Because the ancients could not produce temperatures high enough to melt iron fully, the production of steel in decent quantities did not occur until the introduction of blister steel during the Middle Ages. This method introduced carbon by heating wrought iron in charcoal for long periods of time, but the absorption of carbon in this manner is extremely slow thus the penetration was not very deep, so the alloy was not homogeneous. In 1740, Benjamin Huntsman began melting blister steel in a crucible to even out the carbon content, creating the first process for the mass production of tool steel. Huntsman's process was used for manufacturing tool steel until the early 1900s. The introduction of the blast furnace to Europe in the Middle Ages meant that people could produce pig iron in much higher volumes than wrought iron. Because pig iron could be melted, people began to develop processes to reduce carbon in liquid pig iron to create steel. Puddling had been used in China since the first century, and was introduced in Europe during the 1700s, where molten pig iron was stirred while exposed to the air, to remove the carbon by oxidation. In 1858, Henry Bessemer developed a process of steel-making by blowing hot air through liquid pig iron to reduce the carbon content. The Bessemer process led to the first large scale manufacture of steel. Steel is an alloy of iron and carbon, but the term alloy steel usually only refers to steels that contain other elements— like vanadium, molybdenum, or cobalt—in amounts sufficient to alter the properties of the base steel. Since ancient times, when steel was used primarily for tools and weapons, the methods of producing and working the metal were often closely guarded secrets. Even long after the Age of reason, the steel industry was very competitive and manufacturers went through great lengths to keep their processes confidential, resisting any attempts to scientifically analyze the material for fear it would reveal their methods. For example, the people of Sheffield, a center of steel production in England, were known to routinely bar visitors and tourists from entering town to deter industrial espionage. Thus, almost no metallurgical information existed about steel until 1860. Because of this lack of understanding, steel was not generally considered an alloy until the decades between 1930 and 1970 (primarily due to the work of scientists like William Chandler Roberts-Austen, Adolf Martens, and Edgar Bain), so "alloy steel" became the popular term for ternary and quaternary steel-alloys. After Benjamin Huntsman developed his crucible steel in 1740, he began experimenting with the addition of elements like manganese (in the form of a high-manganese pig-iron called spiegeleisen), which helped remove impurities such as phosphorus and oxygen; a process adopted by Bessemer and still used in modern steels (albeit in concentrations low enough to still be considered carbon steel). Afterward, many people began experimenting with various alloys of steel without much success. However, in 1882, Robert Hadfield, being a pioneer in steel metallurgy, took an interest and produced a steel alloy containing around 12% manganese. Called mangalloy, it exhibited extreme hardness and toughness, becoming the first commercially viable alloy-steel. Afterward, he created silicon steel, launching the search for other possible alloys of steel. Robert Forester Mushet found that by adding tungsten to steel it could produce a very hard edge that would resist losing its hardness at high temperatures. "R. Mushet's special steel" (RMS) became the first high-speed steel. Mushet's steel was quickly replaced by tungsten carbide steel, developed by Taylor and White in 1900, in which they doubled the tungsten content and added small amounts of chromium and vanadium, producing a superior steel for use in lathes and machining tools. In 1903, the Wright brothers used a chromium-nickel steel to make the crankshaft for their airplane engine, while in 1908 Henry Ford began using vanadium steels for parts like crankshafts and valves in his Model T Ford, due to their higher strength and resistance to high temperatures. In 1912, the Krupp Ironworks in Germany developed a rust-resistant steel by adding 21% chromium and 7% nickel, producing the first stainless steel. Others Due to their high reactivity, most metals were not discovered until the 19th century. A method for extracting aluminium from bauxite was proposed by Humphry Davy in 1807, using an electric arc. Although his attempts were unsuccessful, by 1855 the first sales of pure aluminium reached the market. However, as extractive metallurgy was still in its infancy, most aluminium extraction-processes produced unintended alloys contaminated with other elements found in the ore; the most abundant of which was copper. These aluminium-copper alloys (at the time termed "aluminum bronze") preceded pure aluminium, offering greater strength and hardness over the soft, pure metal, and to a slight degree were found to be heat treatable. However, due to their softness and limited hardenability these alloys found little practical use, and were more of a novelty, until the Wright brothers used an aluminium alloy to construct the first airplane engine in 1903. During the time between 1865 and 1910, processes for extracting many other metals were discovered, such as chromium, vanadium, tungsten, iridium, cobalt, and molybdenum, and various alloys were developed. Prior to 1910, research mainly consisted of private individuals tinkering in their own laboratories. However, as the aircraft and automotive industries began growing, research into alloys became an industrial effort in the years following 1910, as new magnesium alloys were developed for pistons and wheels in cars, and pot metal for levers and knobs, and aluminium alloys developed for airframes and aircraft skins were put into use. See also Alloy broadening CALPHAD Ideal mixture List of alloys References Bibliography External links Metallurgy Chemistry

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https://en.wikipedia.org/wiki/Agrarianism

Agrarianism

Agrarianism is a social and political philosophy that has promoted subsistence agriculture, family farming, widespread property ownership, and political decentralization. Adherents of agrarianism tend to value traditional bonds of local community over urban modernity. Agrarian political parties sometimes aim to support the rights and sustainability of small farmers and poor peasants against the wealthy in society. Philosophy Some scholars suggest that agrarianism values rural society as superior to urban society and the independent farmer as superior to the paid worker, and sees farming as a way of life that can shape the ideal social values. It stresses the superiority of a simpler rural life as opposed to the complexity of city life. For example, M. Thomas Inge defines agrarianism by the following basic tenets: Farming is the sole occupation that offers total independence and self-sufficiency. Urban life, capitalism, and technology destroy independence and dignity and foster vice and weakness. The agricultural community, with its fellowship of labor and co-operation, is the model society. The farmer has a solid, stable position in the world order. They have "a sense of identity, a sense of historical and religious tradition, a feeling of belonging to a concrete family, place, and region, which are psychologically and culturally beneficial." The harmony of their life checks the encroachments of a fragmented, alienated modern society. Cultivation of the soil "has within it a positive spiritual good" and from it the cultivator acquires the virtues of "honor, manliness, self-reliance, courage, moral integrity, and hospitality." They result from a direct contact with nature and, through nature, a closer relationship to God. The agrarian is blessed in that they follow the example of God in creating order out of chaos. History The philosophical roots of agrarianism include European and Chinese philosophers. The Chinese school of Agriculturalism (农家/農家) was a philosophy that advocated peasant utopian communalism and egalitarianism. In societies influenced by Confucianism, the farmer was considered an esteemed productive member of society, but merchants who made money were looked down upon. That influenced European intellectuals like François Quesnay, an avid Confucianist and advocate of China's agrarian policies, in forming the French agrarian philosophy of physiocracy. The physiocrats, along with the ideas of John Locke and the Romantic Era, formed the basis of modern European and American agrarianism. Types of agrarianism Physiocracy Jeffersonian democracy The United States president Thomas Jefferson was an agrarian who based his ideas about the budding American democracy around the notion that farmers are "the most valuable citizens" and the truest republicans. Jefferson and his support base were committed to American republicanism, which they saw as being in opposition to aristocracy and corruption, and which prioritized virtue, exemplified by the "yeoman farmer", "planters", and the "plain folk". In praising the rural farmfolk, the Jeffersonians felt that financiers, bankers and industrialists created "cesspools of corruption" in the cities and should thus be avoided. The Jeffersonians sought to align the American economy more with agriculture than industry. Part of their motive to do so was Jefferson's fear that the over-industrialization of America would create a class of wage slaves who relied on their employers for income and sustenance. In turn, these workers would cease to be independent voters as their vote could be manipulated by said employers. To counter this, Jefferson introduced, as scholar Clay Jenkinson noted, "a graduated income tax that would serve as a disincentive to vast accumulations of wealth and would make funds available for some sort of benign redistribution downward" and tariffs on imported articles, which were mainly purchased by the wealthy. In 1811, Jefferson, writing to a friend, explained: "these revenues will be levied entirely on the rich... . the rich alone use imported articles, and on these alone the whole taxes of the general government are levied. the poor man ... pays not a farthing of tax to the general government, but on his salt." There is general agreement that the substantial United States' federal policy of offering land grants (such as thousands of gifts of land to veterans) had a positive impact on economic development in the 19th century. Agrarian socialism Agrarian socialism is a form of agrarianism that is anti-capitalist in nature and seeks to introduce socialist economic systems in their stead. Zapatismo Notable agrarian socialists include Emiliano Zapata who was a leading figure in the Mexican Revolution. As part of the Liberation Army of the South, his group of revolutionaries fought on behalf of the Mexican peasants, whom they saw as exploited by the landowning classes. Zapata published Plan of Ayala, which called for significant land reforms and land redistribution in Mexico as part of the revolution. Zapata was killed and his forces crushed over the course of the Revolution, but his political ideas lived on in the form of Zapatismo. Zapatismo would form the basis for neozapatismo, the ideology of the Zapatista Army of National Liberation. Known as Ejército Zapatista de Liberación Nacional or EZLN in Spanish, EZLN is a far-left libertarian socialist political and militant group that emerged in the state of Chiapas in southmost Mexico in 1994. EZLN and Neozapatismo, as explicit in their name, seek to revive the agrarian socialist movement of Zapata, but fuse it with new elements such as a commitment to indigenous rights and community-level decision making. Subcommander Marcos, a leading member of the movement, argues that the peoples' collective ownership of the land was and is the basis for all subsequent developments the movement sought to create:...When the land became property of the peasants ... when the land passed into the hands of those who work it ... [This was] the starting point for advances in government, health, education, housing, nutrition, women’s participation, trade, culture, communication, and information ...[it was] recovering the means of production, in this case, the land, animals, and machines that were in the hands of large property owners.” Maoism Maoism, the far-left ideology of Mao Zedong and his followers, places a heavy emphasis on the role of peasants in its goals. In contrast to other Marxist schools of thought which normally seek to acquire the support of urban workers, Maoism sees the peasantry as key. Believing that "political power grows out of the barrel of a gun", Maoism saw the Chinese Peasantry as the prime source for a Marxist vanguard because it possessed two qualities: (i) they were poor, and (ii) they were a political blank slate; in Mao's words, “A clean sheet of paper has no blotches, and so the newest and most beautiful words can be written on it”. During the Chinese Civil War and the Second Sino-Japanese War, Mao and the Chinese Communist Party made extensive use of peasants and rural bases in their military tactics, often eschewing the cities. Following the eventual victory of the Communist Party in both wars, the countryside and how it should be run remained a focus for Mao. In 1958, Mao launched the Great Leap Forward, a social and economic campaign which, amongst other things, altered many aspects of rural Chinese life. It introduced mandatory collective farming and forced the peasantry to organize itself into communal living units which were known as people's communes. These communes, which consisted of 5,000 people on average, were expected to meet high production quotas while the peasants who lived on them adapted to this radically new way of life. The communes were run as co-operatives where wages and money were replaced by work points. Peasants who criticised this new system were persecuted as "rightists" and "counter-revolutionaries". Leaving the communes was forbidden and escaping from them was difficult or impossible, and those who attempted it were subjected to party-orchestrated "public struggle sessions," which further jeopardized their survival. These public criticism sessions were often used to intimidate the peasants into obeying local officials and they often devolved into little more than public beatings. On the communes, experiments were conducted in order to find new methods of planting crops, efforts were made to construct new irrigation systems on a massive scale, and the communes were all encouraged to produce steel backyard furnaces as part of an effort to increase steel production. However, following the Anti-Rightist Campaign, Mao had instilled a mass distrust of intellectuals into China, and thus engineers often were not consulted with regard to the new irrigation systems and the wisdom of asking untrained peasants to produce good quality steel from scrap iron was not publicly questioned. Similarly, the experimentation with the crops did not produce results. In addition to this the Four Pests Campaign was launched, in which the peasants were called upon to destroy sparrows and other wild birds that ate crop seeds, in order to protect fields. Pest birds were shot down or scared away from landing until they dropped from exhaustion. This campaign resulted in an ecological disaster that saw an explosion of the vermin population, especially crop-eating insects, which was consequently not in danger of being killed by predators. None of these new systems were working, but local leaders did not dare to state this, instead, they falsified reports so as not to be punished for failing to meet the quotas. In many cases they stated that they were greatly exceeding their quotas, and in turn, the Chinese state developed a completely false sense of success with regard to the commune system. All of this culminated in the Great Chinese Famine, which began in 1959, lasted 3 years, and saw an estimated 15 to 30 million Chinese people die. A combination of bad weather and the new, failed farming techniques that were introduced by the state led to massive shortages of food. By 1962, the Great Leap Forward was declared to be at an end. In the late 1960s and early 1970s, Mao once again radically altered life in rural China with the launching of the Down to the Countryside Movement. As a response to the Great Chinese Famine, the Chinese President Liu Shaoqi began "sending down" urban youths to rural China in order to recover its population losses and alleviate overcrowding in the cities. However, Mao turned the practice into a political crusade, declaring that the sending down would strip the youth of any bourgeois tendencies by forcing them to learn from the unprivileged rural peasants. In reality, it was the Communist Party's attempt to reign in the Red Guards, who had become uncontrollable during the course of the Cultural Revolution. 10% of the 1970 urban population of China was sent out to remote rural villages, often in Inner Mongolia. The villages, which were still poorly recovering from the effects of the Great Chinese Famine, did not have the excess resources that were needed to support the newcomers. Furthermore, the so-called "sent-down youth" had no agricultural experience and as a result, they were unaccustomed to the harsh lifestyle that existed in the countryside, and their unskilled labor in the villages provided little benefit to the agricultural sector. As a result, many of the sent-down youth died in the countryside. The relocation of the youths was originally intended to be permanent, but by the end of the Cultural Revolution, the Communist Party relented and some of those who had the capacity to return to the cities were allowed to do so. In imitation of Mao's policies, the Khmer Rouge of Cambodia (who were heavily funded and supported by the People's Republic of China) created their own version of the Great Leap Forward which was known as "Maha Lout Ploh". With the Great Leap Forward as its model, it had similarly disastrous effects, contributing to what is now known as the Cambodian genocide. As a part of the Maha Lout Ploh, the Khmer Rouge sought to create an entirely agrarian socialist society by forcibly relocating 100,000 people to move from Cambodia's cities into newly created communes. The Khmer Rouge leader, Pol Pot sought to "purify" the country by setting it back to "Year Zero", freeing it from "corrupting influences". Besides trying to completely de-urbanize Cambodia, ethnic minorities were slaughtered along with anyone else who was suspected of being a "reactionary" or a member of the "bourgeoisie", to the point that wearing glasses was seen as grounds for execution. The killings were only brought to an end when Cambodia was invaded by the neighboring socialist nation of Vietnam, whose army toppled the Khmer Rouge. However, with Cambodia's entire society and economy in disarray, including its agricultural sector, the country still plunged into renewed famine due to vast food shortages. However, as international journalists began to report on the situation and send images of it out to the world, a massive international response was provoked, leading to one of the most concentrated relief efforts of its time. Notable agrarian parties Peasant parties first appeared across Eastern Europe between 1860 and 1910, when commercialized agriculture and world market forces disrupted traditional rural society, and the railway and growing literacy facilitated the work of roving organizers. Agrarian parties advocated land reforms to redistribute land on large estates among those who work it. They also wanted village cooperatives to keep the profit from crop sales in local hands and credit institutions to underwrite needed improvements. Many peasant parties were also nationalist parties because peasants often worked their land for the benefit of landlords of different ethnicity. Peasant parties rarely had any power before World War I but some became influential in the interwar era, especially in Bulgaria and Czechoslovakia. For a while, in the 1920s and the 1930s, there was a Green International (International Agrarian Bureau) based on the peasant parties in Bulgaria, Czechoslovakia, Poland, and Serbia. It functioned primarily as an information center that spread the ideas of agrarianism and combating socialism on the left and landlords on the right and never launched any significant activities. Europe Bulgaria In Bulgaria, the Bulgarian Agrarian National Union (BZNS) was organized in 1899 to resist taxes and build cooperatives. BZNS came to power in 1919 and introduced many economic, social, and legal reforms. However, conservative forces crushed BZNS in a 1923 coup and assassinated its leader, Aleksandar Stamboliyski (1879–1923). BZNS was made into a communist puppet group until 1989, when it reorganized as a genuine party. Czechoslovakia In Czechoslovakia, the Republican Party of Agricultural and Smallholder People often shared power in parliament as a partner in the five-party pětka coalition. The party's leader, Antonín Švehla (1873–1933), was prime minister several times. It was consistently the strongest party, forming and dominating coalitions. It moved beyond its original agrarian base to reach middle-class voters. The party was banned by the National Front after the Second World War. France In France, the Hunting, Fishing, Nature, Tradition party is a moderate conservative, agrarian party, reaching a peak of 4.23% in the 2002 French presidential election. It would later on become affiliated to France's main conservative party, Union for a Popular Movement. More recently, the Resistons! movement of Jean Lassalle espoused agrarianism. Hungary In Hungary, the first major agrarian party, the small-holders party was founded in 1908. The party became part of the government in the 1920s but lost influence in the government. A new party, the Independent Smallholders, Agrarian Workers and Civic Party was established in 1930 with a more radical program representing larger scale land redistribution initiatives. They implemented this program together with the other coalition parties after WWII. However, after 1949 the party was outlawed when a one-party system was introduced. They became part of the government again 1990–1994, and 1998-2002 after which they lost political support. The ruling Fidesz party has an agrarian faction, and promotes agrarian interest since 2010 with the emphasis now placed on supporting larger family farms versus small-holders. Ireland In the late 19th century, the Irish National Land League aimed to abolish landlordism in Ireland and enable tenant farmers to own the land they worked on. The "Land War" of 1878–1909 led to the Irish Land Acts, ending absentee landlords and ground rent and redistributing land among peasant farmers. Post-independence, the Farmers' Party operated in the Irish Free State from 1922, folding into the National Centre Party in 1932. It was mostly supported by wealthy farmers in the east of Ireland. Clann na Talmhan (Family of the Land; also called the National Agricultural Party) was founded in 1938. They focused more on the poor smallholders of the west, supporting land reclamation, afforestation, social democracy and rates reform. They formed part of the governing coalition of the Government of the 13th Dáil and Government of the 15th Dáil. Economic improvement in the 1960s saw farmers vote for other parties and Clann na Talmhan disbanded in 1965. Kazakhstan In Kazakhstan, the Peasants' Union, originally a communist organization, was formed as one of first agrarian parties in independent Kazakhstan and would win four seats in the 1994 legislative election. The Agrarian Party of Kazakhstan, led by Romin Madinov, was founded in 1999, which favored the privatization of agricultural land, developments towards rural infrastructure, as well as changes in the tax system in agrarian economy. The party would go on to win three Mäjilis seats in the 1999 legislative election and eventually unite with the Civic Party of Kazakhstan to form the pro-government Agrarian-Industrial Union of Workers (AIST) bloc that would be chaired by Madinov for the 2004 legislative election, with the AIST bloc winning 11 seats in the Mäjilis. From there, the bloc remained short-lived as it would merge with the ruling Nur Otan party in 2006. Several other parties in Kazakhstan over the years have embraced agrarian policies in their programs in an effort to appeal towards a large rural Kazakh demographic base, which included Amanat, ADAL, and Respublica. Since late 2000s, the "Auyl" People's Democratic Patriotic Party remains the largest and most influential agrarian-oriented party in Kazakhstan, as its presidential candidate Jiguli Dairabaev had become the second-place frontrunner in the 2022 presidential election after sweeping 3.4% of the vote. In the 2023 legislative election, the Auyl party for the first time was represented the parliament after winning nine seats in the lower chamber Mäjilis. The party raises rural issues in regard to decaying villages, rural development and the agro-industrial complex, the issues of social security of the rural population, and has consistently opposed the ongoing rural flight in Kazakhstan. Latvia In Latvia, the Union of Greens and Farmers is supportive of traditional small farms and perceives them as more environmentally friendly than large-scale farming: Nature is threatened by development, while small farms are threatened by large industrial-scale farms. Lithuania In Lithuania, as of 2017, the government is led by the Lithuanian Farmers and Greens Union, under the leadership of industrial farmer Ramūnas Karbauskis. Nordic countries Poland In Poland, the Polish People's Party (Polskie Stronnictwo Ludowe, PSL) traces its tradition to an agrarian party in Austro-Hungarian-controlled Galician Poland. After the fall of the communist regime, PSL's biggest success came in 1993 elections, where it won 132 out of 460 parliamentary seats. Since then, PSL's support has steadily declined, until 2019, when they formed Polish Coalition with an anti- establishment, direct democracy Kukiz'15 party, and managed to get 8.5% of popular vote. Moreover, PSL tends to get much better results in local elections. In 2014 elections they have managed to get 23.88% of votes. The right-wing Law and Justice party has also become supportive of agrarian policies in recent years and polls show that most of their support comes from rural areas. AGROunia resembles the features of agrarianism. Romania In Romania, older party parties from Transylvania, Moldavia, and Wallachia merged to become the National Peasants' Party (PNȚ) in 1926. Iuliu Maniu (1873–1953) was a prime minister with an agrarian cabinet from 1928 to 1930 and briefly in 1932–1933, but the Great Depression made proposed reforms impossible. The forcefully-introduced and illegal communist regime dissolved the party in 1947 (along with other historical parties such as the National Liberal Party), but it reformed in 1989 after they fell from power. The reformed party, which also incorporated elements of Christian democracy in its ideology, governed Romania as part of the Romanian Democratic Convention (CDR) between 1996 and 2000. Serbia In Serbia, Nikola Pašić (1845–1926) and his People's Radical Party dominated Serbian politics after 1903. The party also monopolized power in Yugoslavia from 1918 to 1929. During the dictatorship of the 1930s, the prime minister was from that party. Ukraine In Ukraine, the Radical Party of Oleh Lyashko has promised to purify the country of oligarchs "with a pitchfork". The party advocates a number of traditional left-wing positions (a progressive tax structure, a ban on agricultural land sale and eliminating the illegal land market, a tenfold increase in budget spending on health, setting up primary health centres in every village) and mixes them with strong nationalist sentiments. United Kingdom In land law the heyday of English, Irish (and thus Welsh) agrarianism was to 1603, led by the Tudor royal advisors, who sought to maintain a broad pool of agricultural commoners from which to draw military men, against the interests of larger landowners who sought enclosure (meaning complete private control of common land, over which by custom and common law lords of the manor always enjoyed minor rights). The heyday was eroded by hundreds of Acts of Parliament to expressly permit enclosure, chiefly from 1650 to the 1810s. Politicians standing strongly as reactionaries to this included the Levellers, those anti-industrialists (Luddites) going beyond opposing new weaving technology and, later, radicals such as William Cobbett. A high level of net national or local self-sufficiency has a strong base in campaigns and movements. In the 19th century such empowered advocates included Peelites and most Conservatives. The 20th century saw the growth or start of influential non-governmental organisations, such as the National Farmers' Union of England and Wales, Campaign for Rural England, Friends of the Earth (EWNI) and of the England Wales, Scottish and Northern Irish political parties prefixed by and focussed on Green politics. The 21st century has seen decarbonisation already in electricity markets. Following protests and charitable lobbying local food has seen growing market share, sometimes backed by wording in public policy papers and manifestos. The UK has many sustainability-prioritising businesses, green charity campaigns, events and lobby groups ranging from espousing allotment gardens (hobby community farming) through to a clear policy of local food and/or self-sustainability models. Oceania Australia Historian F.K. Crowley finds that: The National Party of Australia (formerly called the Country Party), from the 1920s to the 1970s, promulgated its version of agrarianism, which it called "countrymindedness". The goal was to enhance the status of the graziers (operators of big sheep stations) and small farmers and justified subsidies for them. New Zealand The New Zealand Liberal Party aggressively promoted agrarianism in its heyday (1891–1912). The landed gentry and aristocracy ruled Britain at this time. New Zealand never had an aristocracy but its wealthy landowners largely controlled politics before 1891. The Liberal Party set out to change that by a policy it called "populism." Richard Seddon had proclaimed the goal as early as 1884: "It is the rich and the poor; it is the wealthy and the landowners against the middle and labouring classes. That, Sir, shows the real political position of New Zealand." The Liberal strategy was to create a large class of small landowning farmers who supported Liberal ideals. The Liberal government also established the basis of the later welfare state such as old age pensions and developed a system for settling industrial disputes, which was accepted by both employers and trade unions. In 1893, it extended voting rights to women, making New Zealand the first country in the world to do so. To obtain land for farmers, the Liberal government from 1891 to 1911 purchased of Maori land. The government also purchased from large estate holders for subdivision and closer settlement by small farmers. The Advances to Settlers Act (1894) provided low-interest mortgages, and the agriculture department disseminated information on the best farming methods. The Liberals proclaimed success in forging an egalitarian, anti-monopoly land policy. The policy built up support for the Liberal Party in rural North Island electorates. By 1903, the Liberals were so dominant that there was no longer an organized opposition in Parliament. North America The United States and Canada both saw a rise of Agrarian-oriented parties in the early twentieth century as economic troubles motivated farming communities to become politically active. It has been proposed that different responses to agrarian protest largely determined the course of power generated by these newly-energized rural factions. According to Sociologist Barry Eidlin:"In the United States, Democrats adopted a co-optive response to farmer and labor protest, incorporating these constituencies into the New Deal coalition. In Canada, both mainstream parties adopted a coercive response, leaving these constituencies politically excluded and available for an independent left coalition."These reactions may have helped determine the outcome of agrarian power and political associations in the US and Canada. United States of America Kansas Economic desperation experienced by farmers across the state of Kansas in the nineteenth century spurred the creation of The People's Party in 1890, and soon-after would gain control of the governor's office in 1892. This party, consisting of a mix of Democrats, Socialists, Populists, and Fusionists, would find itself buckling from internal conflict regarding the unlimited coinage of silver. The Populists permanently lost power in 1898. Oklahoma Oklahoma farmers considered their political activity during the early twentieth century due to the outbreak of war, depressed crop prices, and an inhibited sense of progression towards owning their own farms. Tenancy had been reportedly as high as 55% in Oklahoma by 1910. These pressures saw agrarian counties in Oklahoma supporting Socialist policies and politics, with the Socialist platform proposing a deeply agrarian-radical platform:...the platform proposed a "Renters and Farmer's Program" which was strongly agrarian radical in its insistence upon various measures to put land into "The hands of the actual tillers of the soil." Although it did not propose to nationalize privately owned land, it did offer numerous plans to enlarge the state's public domain, from which land would be rented at prevailing share rents to tenants until they had paid rent equal to the land's value. The tenant and his children would have the right of occupancy and use, but the 'title' would remind in the 'commonwealth', an arrangement that might be aptly termed 'Socialist fee simple'. They proposed to exempt from taxation all farm dwellings, animals, and improvements up to the value of $1,000. The State Board of Agriculture would encourage 'co-operative societies' of farmers to make plans f or the purchase of land, seed, tools, and for preparing and selling produce. In order to give farmers essential services at cost, the Socialists called for the creation of state banks and mortgage agencies, crop insurance, elevators, and warehouses.This agrarian-backed Socialist party would win numerous offices, causing a panic within the local Democratic party. This agrarian-Socialist movement would be inhibited by voter suppression laws aimed at reducing the participation of voters of color, as well as national wartime policies intended to disrupt political elements considered subversive. This party would peak in power in 1914. Back-to-the-land movement Agrarianism is similar to but not identical with the back-to-the-land movement. Agrarianism concentrates on the fundamental goods of the earth, on communities of more limited economic and political scale than in modern society, and on simple living, even when the shift involves questioning the "progressive" character of some recent social and economic developments. Thus, agrarianism is not industrial farming, with its specialization on products and industrial scale. See also Agrarian socialism Farmer–Labor Party, USA early 20th century Jeffersonian democracy Labour-Farmer Party, Japan 1920s Minnesota Farmer–Labor Party, USA early 20th century Nordic agrarian parties Yeoman, English farmers References Further reading Agrarian values Brass, Tom. Peasants, Populism and Postmodernism: The Return of the Agrarian Myth (2000) * Inge, M. Thomas. Agrarianism in American Literature (1969) Kolodny, Annette. The Land before Her: Fantasy and Experience of the American Frontiers, 1630–1860 (1984). online edition Marx, Leo. The Machine in the Garden: Technology and the Pastoral Ideal in America (1964). Murphy, Paul V. The Rebuke of History: The Southern Agrarians and American Conservative Thought (2000) Parrington, Vernon. Main Currents in American Thought (1927), 3-vol online Thompson, Paul, and Thomas C. Hilde, eds. The Agrarian Roots of Pragmatism (2000) Primary sources Sorokin, Pitirim A. et al., eds. A Systematic Source Book in Rural Sociology (3 vol. 1930) vol 1 pp. 1–146 covers many major thinkers down to 1800 Europe Bell, John D. Peasants in Power: Alexander Stamboliski and the Bulgarian Agrarian National Union, 1899–1923(1923) Donnelly, James S. Captain Rock: The Irish Agrarian Rebellion of 1821–1824 (2009) Donnelly, James S. Irish Agrarian Rebellion, 1760–1800 (2006) Gross, Feliks, ed. European Ideologies: A Survey of 20th Century Political Ideas (1948) pp. 391–481 online edition , on Russia and Bulgaria Kubricht, Andrew Paul. "The Czech Agrarian Party, 1899-1914: a study of national and economic agitation in the Habsburg monarchy" (PhD thesis, Ohio State University Press, 1974) Narkiewicz, Olga A. The Green Flag: Polish Populist Politics, 1867–1970 (1976). Oren, Nissan. Revolution Administered: Agrarianism and Communism in Bulgaria (1973), focus is post 1945 Stefanov, Kristian. Between Ideological Loyalty and Political Adaptation: 'The Agrarian Question' in the Development of Bulgarian Social Democracy, 1891-1912, East European Politics, Societies and Cultures, Is. 4, 2023. Paine, Thomas. Agrarian Justice (1794) Roberts, Henry L. Rumania: Political Problems of an Agrarian State (1951). North America Goodwyn, Lawrence. The Populist Moment: A Short History of the Agrarian Revolt in America (1978), 1880s and 1890s in U.S. Lipset, Seymour Martin. Agrarian socialism: the Coöperative Commonwealth Federation in Saskatchewan (1950), 1930s-1940s McConnell, Grant. The decline of agrarian democracy(1953), 20th century U.S. Mark, Irving. Agrarian conflicts in colonial New York, 1711–1775 (1940) Ochiai, Akiko. Harvesting Freedom: African American Agrarianism in Civil War Era South Carolina (2007) Robison, Dan Merritt. Bob Taylor and the agrarian revolt in Tennessee (1935) Stine, Harold E. The agrarian revolt in South Carolina;: Ben Tillman and the Farmers' Alliance (1974) Summerhill, Thomas. Harvest of Dissent: Agrarianism in Nineteenth-Century New York (2005) Szatmary, David P. Shays' Rebellion: The Making of an Agrarian Insurrection (1984), 1787 in Massachusetts Woodward, C. Vann. Tom Watson: Agrarian Rebel (1938) online edition Global South Brass, Tom (ed.). New Farmers' Movements in India (1995) 304 pages. Handy, Jim. Revolution in the Countryside: Rural Conflict and Agrarian Reform in Guatemala, 1944–1954 (1994) Paige, Jeffery M. Agrarian revolution: social movements and export agriculture in the underdeveloped world (1978) 435 pages excerpt and text search Sanderson, Steven E. Agrarian populism and the Mexican state: the struggle for land in Sonora (1981) Stokes, Eric. The Peasant and the Raj: Studies in Agrarian Society and Peasant Rebellion in Colonial India (1980) Tannenbaum, Frank. The Mexican Agrarian Revolution'' (1930) External links Writings of a Deliberate Agrarian The New Agrarian

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Atomic

Atomic may refer to: Of or relating to the atom, the smallest particle of a chemical element that retains its chemical properties Atomic physics, the study of the atom Atomic Age, also known as the "Atomic Era" Atomic scale, distances comparable to the dimensions of an atom Atom (order theory), in mathematics Atomic (cocktail), a champagne cocktail Atomic (magazine), an Australian computing and technology magazine Atomic Skis, an Austrian ski producer Music Atomic (band), a Norwegian jazz quintet Atomic (Lit album), 2001 Atomic (Mogwai album), 2016 Atomic, an album by Rockets, 1982 Atomic (EP), by , 2013 "Atomic" (song), by Blondie, 1979 "Atomic", a song by Tiger Army from Tiger Army III: Ghost Tigers Rise See also Atom (disambiguation) Atomicity (database systems) Nuclear (disambiguation) Atomism, philosophy about the basic building blocks of reality Atomic City (disambiguation) Atomic formula, a formula without subformulas Atomic number, the number of protons found in the nucleus of an atom Atomic chess, a chess variant Atomic coffee machine, a 1950s stovetop coffee machine Atomic operation, in computer science Atomic TV, a channel launched in 1997 in Poland Nuclear power Nuclear weapon

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Acoustics

Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an acoustical engineer. The application of acoustics is present in almost all aspects of modern society with the most obvious being the audio and noise control industries. Hearing is one of the most crucial means of survival in the animal world and speech is one of the most distinctive characteristics of human development and culture. Accordingly, the science of acoustics spreads across many facets of human society—music, medicine, architecture, industrial production, warfare and more. Likewise, animal species such as songbirds and frogs use sound and hearing as a key element of mating rituals or for marking territories. Art, craft, science and technology have provoked one another to advance the whole, as in many other fields of knowledge. Robert Bruce Lindsay's "Wheel of Acoustics" is a well accepted overview of the various fields in acoustics. History Etymology The word "acoustic" is derived from the Greek word ἀκουστικός (akoustikos), meaning "of or for hearing, ready to hear" and that from ἀκουστός (akoustos), "heard, audible", which in turn derives from the verb ἀκούω(akouo), "I hear". The Latin synonym is "sonic", after which the term sonics used to be a synonym for acoustics and later a branch of acoustics. Frequencies above and below the audible range are called "ultrasonic" and "infrasonic", respectively. Early research in acoustics In the 6th century BC, the ancient Greek philosopher Pythagoras wanted to know why some combinations of musical sounds seemed more beautiful than others, and he found answers in terms of numerical ratios representing the harmonic overtone series on a string. He is reputed to have observed that when the lengths of vibrating strings are expressible as ratios of integers (e.g. 2 to 3, 3 to 4), the tones produced will be harmonious, and the smaller the integers the more harmonious the sounds. For example, a string of a certain length would sound particularly harmonious with a string of twice the length (other factors being equal). In modern parlance, if a string sounds the note C when plucked, a string twice as long will sound a C an octave lower. In one system of musical tuning, the tones in between are then given by 16:9 for D, 8:5 for E, 3:2 for F, 4:3 for G, 6:5 for A, and 16:15 for B, in ascending order. Aristotle (384–322 BC) understood that sound consisted of compressions and rarefactions of air which "falls upon and strikes the air which is next to it...", a very good expression of the nature of wave motion. On Things Heard, generally ascribed to Strato of Lampsacus, states that the pitch is related to the frequency of vibrations of the air and to the speed of sound. In about 20 BC, the Roman architect and engineer Vitruvius wrote a treatise on the acoustic properties of theaters including discussion of interference, echoes, and reverberation—the beginnings of architectural acoustics. In Book V of his De architectura (The Ten Books of Architecture) Vitruvius describes sound as a wave comparable to a water wave extended to three dimensions, which, when interrupted by obstructions, would flow back and break up following waves. He described the ascending seats in ancient theaters as designed to prevent this deterioration of sound and also recommended bronze vessels of appropriate sizes be placed in theaters to resonate with the fourth, fifth and so on, up to the double octave, in order to resonate with the more desirable, harmonious notes. During the Islamic golden age, Abū Rayhān al-Bīrūnī (973-1048) is believed to have postulated that the speed of sound was much slower than the speed of light. The physical understanding of acoustical processes advanced rapidly during and after the Scientific Revolution. Mainly Galileo Galilei (1564–1642) but also Marin Mersenne (1588–1648), independently, discovered the complete laws of vibrating strings (completing what Pythagoras and Pythagoreans had started 2000 years earlier). Galileo wrote "Waves are produced by the vibrations of a sonorous body, which spread through the air, bringing to the tympanum of the ear a stimulus which the mind interprets as sound", a remarkable statement that points to the beginnings of physiological and psychological acoustics. Experimental measurements of the speed of sound in air were carried out successfully between 1630 and 1680 by a number of investigators, prominently Mersenne. Meanwhile, Newton (1642–1727) derived the relationship for wave velocity in solids, a cornerstone of physical acoustics (Principia, 1687). Age of Enlightenment and onward Substantial progress in acoustics, resting on firmer mathematical and physical concepts, was made during the eighteenth century by Euler (1707–1783), Lagrange (1736–1813), and d'Alembert (1717–1783). During this era, continuum physics, or field theory, began to receive a definite mathematical structure. The wave equation emerged in a number of contexts, including the propagation of sound in air. In the nineteenth century the major figures of mathematical acoustics were Helmholtz in Germany, who consolidated the field of physiological acoustics, and Lord Rayleigh in England, who combined the previous knowledge with his own copious contributions to the field in his monumental work The Theory of Sound (1877). Also in the 19th century, Wheatstone, Ohm, and Henry developed the analogy between electricity and acoustics. The twentieth century saw a burgeoning of technological applications of the large body of scientific knowledge that was by then in place. The first such application was Sabine's groundbreaking work in architectural acoustics, and many others followed. Underwater acoustics was used for detecting submarines in the first World War. Sound recording and the telephone played important roles in a global transformation of society. Sound measurement and analysis reached new levels of accuracy and sophistication through the use of electronics and computing. The ultrasonic frequency range enabled wholly new kinds of application in medicine and industry. New kinds of transducers (generators and receivers of acoustic energy) were invented and put to use. Definition Acoustics is defined by ANSI/ASA S1.1-2013 as "(a) Science of sound, including its production, transmission, and effects, including biological and psychological effects. (b) Those qualities of a room that, together, determine its character with respect to auditory effects." The study of acoustics revolves around the generation, propagation and reception of mechanical waves and vibrations. The steps shown in the above diagram can be found in any acoustical event or process. There are many kinds of cause, both natural and volitional. There are many kinds of transduction process that convert energy from some other form into sonic energy, producing a sound wave. There is one fundamental equation that describes sound wave propagation, the acoustic wave equation, but the phenomena that emerge from it are varied and often complex. The wave carries energy throughout the propagating medium. Eventually this energy is transduced again into other forms, in ways that again may be natural and/or volitionally contrived. The final effect may be purely physical or it may reach far into the biological or volitional domains. The five basic steps are found equally well whether we are talking about an earthquake, a submarine using sonar to locate its foe, or a band playing in a rock concert. The central stage in the acoustical process is wave propagation. This falls within the domain of physical acoustics. In fluids, sound propagates primarily as a pressure wave. In solids, mechanical waves can take many forms including longitudinal waves, transverse waves and surface waves. Acoustics looks first at the pressure levels and frequencies in the sound wave and how the wave interacts with the environment. This interaction can be described as either a diffraction, interference or a reflection or a mix of the three. If several media are present, a refraction can also occur. Transduction processes are also of special importance to acoustics. Fundamental concepts Wave propagation: pressure levels In fluids such as air and water, sound waves propagate as disturbances in the ambient pressure level. While this disturbance is usually small, it is still noticeable to the human ear. The smallest sound that a person can hear, known as the threshold of hearing, is nine orders of magnitude smaller than the ambient pressure. The loudness of these disturbances is related to the sound pressure level (SPL) which is measured on a logarithmic scale in decibels. Wave propagation: frequency Physicists and acoustic engineers tend to discuss sound pressure levels in terms of frequencies, partly because this is how our ears interpret sound. What we experience as "higher pitched" or "lower pitched" sounds are pressure vibrations having a higher or lower number of cycles per second. In a common technique of acoustic measurement, acoustic signals are sampled in time, and then presented in more meaningful forms such as octave bands or time frequency plots. Both of these popular methods are used to analyze sound and better understand the acoustic phenomenon. The entire spectrum can be divided into three sections: audio, ultrasonic, and infrasonic. The audio range falls between 20 Hz and 20,000 Hz. This range is important because its frequencies can be detected by the human ear. This range has a number of applications, including speech communication and music. The ultrasonic range refers to the very high frequencies: 20,000 Hz and higher. This range has shorter wavelengths which allow better resolution in imaging technologies. Medical applications such as ultrasonography and elastography rely on the ultrasonic frequency range. On the other end of the spectrum, the lowest frequencies are known as the infrasonic range. These frequencies can be used to study geological phenomena such as earthquakes. Analytic instruments such as the spectrum analyzer facilitate visualization and measurement of acoustic signals and their properties. The spectrogram produced by such an instrument is a graphical display of the time varying pressure level and frequency profiles which give a specific acoustic signal its defining character. Transduction in acoustics A transducer is a device for converting one form of energy into another. In an electroacoustic context, this means converting sound energy into electrical energy (or vice versa). Electroacoustic transducers include loudspeakers, microphones, particle velocity sensors, hydrophones and sonar projectors. These devices convert a sound wave to or from an electric signal. The most widely used transduction principles are electromagnetism, electrostatics and piezoelectricity. The transducers in most common loudspeakers (e.g. woofers and tweeters), are electromagnetic devices that generate waves using a suspended diaphragm driven by an electromagnetic voice coil, sending off pressure waves. Electret microphones and condenser microphones employ electrostatics—as the sound wave strikes the microphone's diaphragm, it moves and induces a voltage change. The ultrasonic systems used in medical ultrasonography employ piezoelectric transducers. These are made from special ceramics in which mechanical vibrations and electrical fields are interlinked through a property of the material itself. Acoustician An acoustician is an expert in the science of sound. Education There are many types of acoustician, but they usually have a Bachelor's degree or higher qualification. Some possess a degree in acoustics, while others enter the discipline via studies in fields such as physics or engineering. Much work in acoustics requires a good grounding in Mathematics and science. Many acoustic scientists work in research and development. Some conduct basic research to advance our knowledge of the perception (e.g. hearing, psychoacoustics or neurophysiology) of speech, music and noise. Other acoustic scientists advance understanding of how sound is affected as it moves through environments, e.g. underwater acoustics, architectural acoustics or structural acoustics. Other areas of work are listed under subdisciplines below. Acoustic scientists work in government, university and private industry laboratories. Many go on to work in Acoustical Engineering. Some positions, such as Faculty (academic staff) require a Doctor of Philosophy. Subdisciplines Archaeoacoustics Archaeoacoustics, also known as the archaeology of sound, is one of the only ways to experience the past with senses other than our eyes. Archaeoacoustics is studied by testing the acoustic properties of prehistoric sites, including caves. Iegor Rezkinoff, a sound archaeologist, studies the acoustic properties of caves through natural sounds like humming and whistling. Archaeological theories of acoustics are focused around ritualistic purposes as well as a way of echolocation in the caves. In archaeology, acoustic sounds and rituals directly correlate as specific sounds were meant to bring ritual participants closer to a spiritual awakening. Parallels can also be drawn between cave wall paintings and the acoustic properties of the cave; they are both dynamic. Because archaeoacoustics is a fairly new archaeological subject, acoustic sound is still being tested in these prehistoric sites today. Aeroacoustics Aeroacoustics is the study of noise generated by air movement, for instance via turbulence, and the movement of sound through the fluid air. This knowledge is applied in acoustical engineering to study how to quieten aircraft. Aeroacoustics is important for understanding how wind musical instruments work. Acoustic signal processing Acoustic signal processing is the electronic manipulation of acoustic signals. Applications include: active noise control; design for hearing aids or cochlear implants; echo cancellation; music information retrieval, and perceptual coding (e.g. MP3 or Opus). Architectural acoustics Architectural acoustics (also known as building acoustics) involves the scientific understanding of how to achieve good sound within a building. It typically involves the study of speech intelligibility, speech privacy, music quality, and vibration reduction in the built environment. Commonly studied environments are hospitals, classrooms, dwellings, performance venues, recording and broadcasting studios. Focus considerations include room acoustics, airborne and impact transmission in building structures, airborne and structure-borne noise control, noise control of building systems and electroacoustic systems . Bioacoustics Bioacoustics is the scientific study of the hearing and calls of animal calls, as well as how animals are affected by the acoustic and sounds of their habitat. Electroacoustics This subdiscipline is concerned with the recording, manipulation and reproduction of audio using electronics. This might include products such as mobile phones, large scale public address systems or virtual reality systems in research laboratories. Environmental noise and soundscapes Environmental acoustics is concerned with noise and vibration caused by railways, road traffic, aircraft, industrial equipment and recreational activities. The main aim of these studies is to reduce levels of environmental noise and vibration. Research work now also has a focus on the positive use of sound in urban environments: soundscapes and tranquility. Musical acoustics Musical acoustics is the study of the physics of acoustic instruments; the audio signal processing used in electronic music; the computer analysis of music and composition, and the perception and cognitive neuroscience of music. Noise The goal this acoustics sub-discipline is to reduce the impact of unwanted sound. Scope of noise studies includes the generation, propagation, and impact on structures, objects, and people. Innovative model development Measurement techniques Mitigation strategies Input to the establishment of standards and regulations Noise research investigates the impact of noise on humans and animals to include work in definitions, abatement, transportation noise, hearing protection, Jet and rocket noise, building system noise and vibration, atmospheric sound propagation, soundscapes, and low-frequency sound. Psychoacoustics Many studies have been conducted to identify the relationship between acoustics and cognition, or more commonly known as psychoacoustics, in which what one hears is a combination of perception and biological aspects. The information intercepted by the passage of sound waves through the ear is understood and interpreted through the brain, emphasizing the connection between the mind and acoustics. Psychological changes have been seen as brain waves slow down or speed up as a result of varying auditory stimulus which can in turn affect the way one thinks, feels, or even behaves. This correlation can be viewed in normal, everyday situations in which listening to an upbeat or uptempo song can cause one's foot to start tapping or a slower song can leave one feeling calm and serene. In a deeper biological look at the phenomenon of psychoacoustics, it was discovered that the central nervous system is activated by basic acoustical characteristics of music. By observing how the central nervous system, which includes the brain and spine, is influenced by acoustics, the pathway in which acoustic affects the mind, and essentially the body, is evident. Speech Acousticians study the production, processing and perception of speech. Speech recognition and Speech synthesis are two important areas of speech processing using computers. The subject also overlaps with the disciplines of physics, physiology, psychology, and linguistics. Structural Vibration and Dynamics Structural acoustics is the study of motions and interactions of mechanical systems with their environments and the methods of their measurement, analysis, and control . There are several sub-disciplines found within this regime: Modal Analysis Material characterization Structural health monitoring Acoustic Metamaterials Friction Acoustics Applications might include: ground vibrations from railways; vibration isolation to reduce vibration in operating theatres; studying how vibration can damage health (vibration white finger); vibration control to protect a building from earthquakes, or measuring how structure-borne sound moves through buildings. Ultrasonics Ultrasonics deals with sounds at frequencies too high to be heard by humans. Specialisms include medical ultrasonics (including medical ultrasonography), sonochemistry, ultrasonic testing, material characterisation and underwater acoustics (sonar). Underwater acoustics Underwater acoustics is the scientific study of natural and man-made sounds underwater. Applications include sonar to locate submarines, underwater communication by whales, climate change monitoring by measuring sea temperatures acoustically, sonic weapons, and marine bioacoustics. Acoustic Conferences InterNoise NoiseCon Forum Acousticum SAE Noise and Vibration Conference and Exhibition Professional societies The Acoustical Society of America (ASA) Australian Acoustical Society (AAS) The European Acoustics Association (EAA) Institute of Electrical and Electronics Engineers (IEEE) Institute of Acoustics (IoA UK) The Audio Engineering Society (AES) American Society of Mechanical Engineers, Noise Control and Acoustics Division (ASME-NCAD) International Commission for Acoustics (ICA) American Institute of Aeronautics and Astronautics, Aeroacoustics (AIAA) International Computer Music Association (ICMA) Academic journals Acoustics | An Open Access Journal from MDPI Acoustics Today Acta Acustica united with Acustica Advances in Acoustics and Vibration Applied Acoustics Building Acoustics IEEE Transacions on Ultrasonics, Ferroelectrics, and Frequency Control Journal of the Acoustical Society of America (JASA) Journal of the Acoustical Society of America, Express Letters (JASA-EL) Journal of the Audio Engineering Society Journal of Sound and Vibration (JSV) Journal of Vibration and Acoustics American Society of Mechanical Engineers MDPI Acoustics Noise Control Engineering Journal SAE International Journal of Vehicle Dynamics, Stability and NVH Ultrasonics (journal) Ultrasonics Sonochemistry Wave Motion See also Outline of acoustics Acoustic attenuation Acoustic emission Acoustic engineering Acoustic impedance Acoustic levitation Acoustic location Acoustic phonetics Acoustic streaming Acoustic tags Acoustic thermometry Acoustic wave Audiology Auditory illusion Diffraction Doppler effect Fisheries acoustics Friction acoustics Helioseismology Lamb wave Linear elasticity The Little Red Book of Acoustics (in the UK) Longitudinal wave Musicology Music therapy Noise pollution One-Way Wave Equation Phonon Picosecond ultrasonics Rayleigh wave Shock wave Seismology Sonification Sonochemistry Soundproofing Soundscape Sonic boom Sonoluminescence Surface acoustic wave Thermoacoustics Transverse wave Wave equation References Further reading External links International Commission for Acoustics European Acoustics Association Acoustical Society of America Institute of Noise Control Engineers National Council of Acoustical Consultants Institute of Acoustic in UK Australian Acoustical Society (AAS) Sound

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https://en.wikipedia.org/wiki/Atomic%20physics

Atomic physics

Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. Atomic physics typically refers to the study of atomic structure and the interaction between atoms. It is primarily concerned with the way in which electrons are arranged around the nucleus and the processes by which these arrangements change. This comprises ions, neutral atoms and, unless otherwise stated, it can be assumed that the term atom includes ions. The term atomic physics can be associated with nuclear power and nuclear weapons, due to the synonymous use of atomic and nuclear in standard English. Physicists distinguish between atomic physics—which deals with the atom as a system consisting of a nucleus and electrons—and nuclear physics, which studies nuclear reactions and special properties of atomic nuclei. As with many scientific fields, strict delineation can be highly contrived and atomic physics is often considered in the wider context of atomic, molecular, and optical physics. Physics research groups are usually so classified. Isolated atoms Atomic physics primarily considers atoms in isolation. Atomic models will consist of a single nucleus that may be surrounded by one or more bound electrons. It is not concerned with the formation of molecules (although much of the physics is identical), nor does it examine atoms in a solid state as condensed matter. It is concerned with processes such as ionization and excitation by photons or collisions with atomic particles. While modelling atoms in isolation may not seem realistic, if one considers atoms in a gas or plasma then the time-scales for atom-atom interactions are huge in comparison to the atomic processes that are generally considered. This means that the individual atoms can be treated as if each were in isolation, as the vast majority of the time they are. By this consideration, atomic physics provides the underlying theory in plasma physics and atmospheric physics, even though both deal with very large numbers of atoms. Electronic configuration Electrons form notional shells around the nucleus. These are normally in a ground state but can be excited by the absorption of energy from light (photons), magnetic fields, or interaction with a colliding particle (typically ions or other electrons). Electrons that populate a shell are said to be in a bound state. The energy necessary to remove an electron from its shell (taking it to infinity) is called the binding energy. Any quantity of energy absorbed by the electron in excess of this amount is converted to kinetic energy according to the conservation of energy. The atom is said to have undergone the process of ionization. If the electron absorbs a quantity of energy less than the binding energy, it will be transferred to an excited state. After a certain time, the electron in an excited state will "jump" (undergo a transition) to a lower state. In a neutral atom, the system will emit a photon of the difference in energy, since energy is conserved. If an inner electron has absorbed more than the binding energy (so that the atom ionizes), then a more outer electron may undergo a transition to fill the inner orbital. In this case, a visible photon or a characteristic X-ray is emitted, or a phenomenon known as the Auger effect may take place, where the released energy is transferred to another bound electron, causing it to go into the continuum. The Auger effect allows one to multiply ionize an atom with a single photon. There are rather strict selection rules as to the electronic configurations that can be reached by excitation by light — however, there are no such rules for excitation by collision processes. History and developments One of the earliest steps towards atomic physics was the recognition that matter was composed of atoms. It forms a part of the texts written in 6th century BC to 2nd century BC, such as those of Democritus or written by . This theory was later developed in the modern sense of the basic unit of a chemical element by the British chemist and physicist John Dalton in the 18th century. At this stage, it wasn't clear what atoms were, although they could be described and classified by their properties (in bulk). The invention of the periodic system of elements by Dmitri Mendeleev was another great step forward. The true beginning of atomic physics is marked by the discovery of spectral lines and attempts to describe the phenomenon, most notably by Joseph von Fraunhofer. The study of these lines led to the Bohr atom model and to the birth of quantum mechanics. In seeking to explain atomic spectra, an entirely new mathematical model of matter was revealed. As far as atoms and their electron shells were concerned, not only did this yield a better overall description, i.e. the atomic orbital model, but it also provided a new theoretical basis for chemistry (quantum chemistry) and spectroscopy. Since the Second World War, both theoretical and experimental fields have advanced at a rapid pace. This can be attributed to progress in computing technology, which has allowed larger and more sophisticated models of atomic structure and associated collision processes. Similar technological advances in accelerators, detectors, magnetic field generation and lasers have greatly assisted experimental work. Significant atomic physicists See also Particle physics Isomeric shift Atomic engineering Atomism Bibliography References External links MIT-Harvard Center for Ultracold Atoms Stanford QFARM Initiative for Quantum Science & Enginneering Joint Quantum Institute at University of Maryland and NIST Atomic Physics on the Internet JILA (Atomic Physics) ORNL Physics Division Atomic, molecular, and optical physics

1201

https://en.wikipedia.org/wiki/American%20Sign%20Language

American Sign Language

American Sign Language (ASL) is a natural language that serves as the predominant sign language of Deaf communities in the United States of America and most of Anglophone Canada. ASL is a complete and organized visual language that is expressed by employing both manual and nonmanual features. Besides North America, dialects of ASL and ASL-based creoles are used in many countries around the world, including much of West Africa and parts of Southeast Asia. ASL is also widely learned as a second language, serving as a lingua franca. ASL is most closely related to French Sign Language (LSF). It has been proposed that ASL is a creole language of LSF, although ASL shows features atypical of creole languages, such as agglutinative morphology. ASL originated in the early 19th century in the American School for the Deaf (ASD) in Hartford, Connecticut, from a situation of language contact. Since then, ASL use has been propagated widely by schools for the deaf and Deaf community organizations. Despite its wide use, no accurate count of ASL users has been taken. Reliable estimates for American ASL users range from 250,000 to 500,000 persons, including a number of children of deaf adults and other hearing individuals. ASL signs have a number of phonemic components, such as movement of the face, the torso, and the hands. ASL is not a form of pantomime although iconicity plays a larger role in ASL than in spoken languages. English loan words are often borrowed through fingerspelling, although ASL grammar is unrelated to that of English. ASL has verbal agreement and aspectual marking and has a productive system of forming agglutinative classifiers. Many linguists believe ASL to be a subject–verb–object language. However, there are several alternative proposals to account for ASL word order. Classification ASL emerged as a language in the American School for the Deaf (ASD), founded by Thomas Gallaudet in 1817, which brought together Old French Sign Language, various village sign languages, and home sign systems. ASL was created in that situation by language contact. ASL was influenced by its forerunners but distinct from all of them. The influence of French Sign Language (LSF) on ASL is readily apparent; for example, it has been found that about 58% of signs in modern ASL are cognate to Old French Sign Language signs. However, that is far less than the standard 80% measure used to determine whether related languages are actually dialects. That suggests that nascent ASL was highly affected by the other signing systems brought by the ASD students although the school's original director, Laurent Clerc, taught in LSF. In fact, Clerc reported that he often learned the students' signs rather than conveying LSF: It has been proposed that ASL is a creole in which LSF is the superstrate language and the native village sign languages are substrate languages. However, more recent research has shown that modern ASL does not share many of the structural features that characterize creole languages. ASL may have begun as a creole and then undergone structural change over time, but it is also possible that it was never a creole-type language. There are modality-specific reasons that sign languages tend towards agglutination, such as the ability to simultaneously convey information via the face, head, torso, and other body parts. That might override creole characteristics such as the tendency towards isolating morphology. Additionally, Clerc and Thomas Hopkins Gallaudet may have used an artificially constructed form of manually coded language in instruction rather than true LSF. Although the United States, the United Kingdom, and Australia share English as a common oral and written language, ASL is not mutually intelligible with either British Sign Language (BSL) or Auslan. All three languages show degrees of borrowing from English, but that alone is not sufficient for cross-language comprehension. It has been found that a relatively high percentage (37–44%) of ASL signs have similar translations in Auslan, which for oral languages would suggest that they belong to the same language family. However, that does not seem justified historically for ASL and Auslan, and it is likely that the resemblance is caused by the higher degree of iconicity in sign languages in general as well as contact with English. American Sign Language is growing in popularity in many states. Many high school and university students desire to take it as a foreign language, but until recently, it was usually not considered a creditable foreign language elective. ASL users, however, have a very distinct culture, and they interact very differently when they talk. Their facial expressions and hand movements reflect what they are communicating. They also have their own sentence structure, which sets the language apart. American Sign Language is now being accepted by many colleges as a language eligible for foreign language course credit; many states are making it mandatory to accept it as such. In some states however, this is only true with regard to high school coursework. History Prior to the birth of ASL, sign language had been used by various communities in the United States. In the United States, as elsewhere in the world, hearing families with deaf children have historically employed ad hoc home sign, which often reaches much higher levels of sophistication than gestures used by hearing people in spoken conversation. As early as 1541 at first contact by Francisco Vásquez de Coronado, there were reports that the Indigenous peoples of the Great Plains widely spoke a sign language to communicate across vast national and linguistic lines. In the 19th century, a "triangle" of village sign languages developed in New England: one in Martha's Vineyard, Massachusetts; one in Henniker, New Hampshire, and one in Sandy River Valley, Maine. Martha's Vineyard Sign Language (MVSL), which was particularly important for the history of ASL, was used mainly in Chilmark, Massachusetts. Due to intermarriage in the original community of English settlers of the 1690s, and the recessive nature of genetic deafness, Chilmark had a high 4% rate of genetic deafness. MVSL was used even by hearing residents whenever a deaf person was present, and also in some situations where spoken language would be ineffective or inappropriate, such as during church sermons or between boats at sea. ASL is thought to have originated in the American School for the Deaf (ASD), founded in Hartford, Connecticut, in 1817. Originally known as The American Asylum, At Hartford, For The Education And Instruction Of The Deaf And Dumb, the school was founded by the Yale graduate and divinity student Thomas Hopkins Gallaudet. Gallaudet, inspired by his success in demonstrating the learning abilities of a young deaf girl Alice Cogswell, traveled to Europe in order to learn deaf pedagogy from European institutions. Ultimately, Gallaudet chose to adopt the methods of the French Institut National de Jeunes Sourds de Paris, and convinced Laurent Clerc, an assistant to the school's founder Charles-Michel de l'Épée, to accompany him back to the United States. Upon his return, Gallaudet founded the ASD on April 15, 1817. The largest group of students during the first seven decades of the school were from Martha's Vineyard, and they brought MVSL with them. There were also 44 students from around Henniker, New Hampshire, and 27 from the Sandy River valley in Maine, each of which had their own village sign language. Other students brought knowledge of their own home signs. Laurent Clerc, the first teacher at ASD, taught using French Sign Language (LSF), which itself had developed in the Parisian school for the deaf established in 1755. From that situation of language contact, a new language emerged, now known as ASL. More schools for the deaf were founded after ASD, and knowledge of ASL spread to those schools. In addition, the rise of Deaf community organizations bolstered the continued use of ASL. Societies such as the National Association of the Deaf and the National Fraternal Society of the Deaf held national conventions that attracted signers from across the country. All of that contributed to ASL's wide use over a large geographical area, atypical of a sign language. While oralism, an approach to educating deaf students focusing on oral language, had previously been used in American schools, the Milan Congress made it dominant and effectively banned the use of sign languages at schools in the United States and Europe. However, the efforts of Deaf advocates and educators, more lenient enforcement of the Congress's mandate, and the use of ASL in religious education and proselytism ensured greater use and documentation compared to European sign languages, albeit more influenced by fingerspelled loanwords and borrowed idioms from English as students were societally pressured to achieve fluency in spoken language. Nevertheless, oralism remained the predominant method of deaf education up to the 1950s. Linguists did not consider sign language to be true "language" but as something inferior. Recognition of the legitimacy of ASL was achieved by William Stokoe, a linguist who arrived at Gallaudet University in 1955 when that was still the dominant assumption. Aided by the Civil Rights Movement of the 1960s, Stokoe argued for manualism, the use of sign language in deaf education. Stokoe noted that sign language shares the important features that oral languages have as a means of communication, and even devised a transcription system for ASL. In doing so, Stokoe revolutionized both deaf education and linguistics. In the 1960s, ASL was sometimes referred to as "Ameslan", but that term is now considered obsolete. Population Counting the number of ASL signers is difficult because ASL users have never been counted by the American census. The ultimate source for current estimates of the number of ASL users in the United States is a report for the National Census of the Deaf Population (NCDP) by Schein and Delk (1974). Based on a 1972 survey of the NCDP, Schein and Delk provided estimates consistent with a signing population between 250,000 and 500,000. The survey did not distinguish between ASL and other forms of signing; in fact, the name "ASL" was not yet in widespread use. Incorrect figures are sometimes cited for the population of ASL users in the United States based on misunderstandings of known statistics. Demographics of the deaf population have been confused with those of ASL use since adults who become deaf late in life rarely use ASL in the home. That accounts for currently-cited estimations that are greater than 500,000; such mistaken estimations can reach as high as 15,000,000. A 100,000-person lower bound has been cited for ASL users; the source of that figure is unclear, but it may be an estimate of prelingual deafness, which is correlated with but not equivalent to signing. ASL is sometimes incorrectly cited as the third- or fourth-most-spoken language in the United States. Those figures misquote Schein and Delk (1974), who actually concluded that ASL speakers constituted the third-largest population "requiring an interpreter in court". Although that would make ASL the third-most used language among monolinguals other than English, it does not imply that it is the fourth-most-spoken language in the United States since speakers of other languages may also speak English. Geographic distribution ASL is used throughout Anglo-America. That contrasts with Europe, where a variety of sign languages are used within the same continent. The unique situation of ASL seems to have been caused by the proliferation of ASL through schools influenced by the American School for the Deaf, wherein ASL originated, and the rise of community organizations for the Deaf. Throughout West Africa, ASL-based sign languages are signed by educated Deaf adults. Such languages, imported by boarding schools, are often considered by associations to be the official sign languages of their countries and are named accordingly, such as Nigerian Sign Language, Ghanaian Sign Language. Such signing systems are found in Benin, Burkina Faso, Ivory Coast, Ghana, Liberia, Mauritania, Mali, Nigeria, and Togo. Due to lack of data, it is still an open question how similar those sign languages are to the variety of ASL used in America. In addition to the aforementioned West African countries, ASL is reported to be used as a first language in Barbados, Bolivia, Cambodia (alongside Cambodian Sign Language), the Central African Republic, Chad, China (Hong Kong), the Democratic Republic of the Congo, Gabon, Jamaica, Kenya, Madagascar, the Philippines, Singapore, and Zimbabwe. ASL is also used as a lingua franca throughout the deaf world, widely learned as a second language. Regional variation Sign production Sign production can often vary according to location. Signers from the South tend to sign with more flow and ease. Native signers from New York have been reported as signing comparatively quicker and sharper. Sign production of native Californian signers has also been reported as being fast. Research on that phenomenon often concludes that the fast-paced production for signers from the coasts could be due to the fast-paced nature of living in large metropolitan areas. That conclusion also supports how the ease with which Southern sign could be caused by the easygoing environment of the South in comparison to that of the coasts. Sign production can also vary depending on age and native language. For example, sign production of letters may vary in older signers. Slight differences in finger spelling production can be a signal of age. Additionally, signers who learned American Sign Language as a second language vary in production. For Deaf signers who learned a different sign language before learning American Sign Language, qualities of their native language may show in their ASL production. Some examples of that varied production include fingerspelling towards the body, instead of away from it, and signing certain movement from bottom to top, instead of top to bottom. Hearing people who learn American Sign Language also have noticeable differences in signing production. The most notable production difference of hearing people learning American Sign Language is their rhythm and arm posture. Sign variants Most popularly, there are variants of the signs for English words such as "birthday", "pizza", "Halloween", "early", and "soon", just a sample of the most commonly recognized signs with variants based on regional change. The sign for "school" is commonly varied between black and white signers; the variants used by black signers are sometimes called Black American Sign Language. Social variation is also found between citation forms and forms used by Deaf gay men for words such as "pain" and "protest". History and implications The prevalence of residential Deaf schools can account for much of the regional variance of signs and sign productions across the United States. Deaf schools often serve students of the state in which the school resides. That limited access to signers from other regions, combined with the residential quality of Deaf Schools promoted specific use of certain sign variants. Native signers did not have much access to signers from other regions during the beginning years of their education. It is hypothesized that because of that seclusion, certain variants of a sign prevailed over others due to the choice of variant used by the student of the school/signers in the community. However, American Sign Language does not appear to be vastly varied in comparison to other signed languages. That is because when Deaf education was beginning in the United States, many educators flocked to the American School for the Deaf in Hartford, Connecticut, whose central location for the first generation of educators in Deaf education to learn American Sign Language allows ASL to be more standardized than its variant. Varieties Varieties of ASL are found throughout the world. There is little difficulty in comprehension among the varieties of the United States and Canada. Mutual intelligibility among those ASL varieties is high, and the variation is primarily lexical. For example, there are three different words for English about in Canadian ASL; the standard way, and two regional variations (Atlantic and Ontario). Variation may also be phonological, meaning that the same sign may be signed in a different way depending on the region. For example, an extremely common type of variation is between the handshapes /1/, /L/, and /5/ in signs with one handshape. There is also a distinct variety of ASL used by the Black Deaf community. Black ASL evolved as a result of racially segregated schools in some states, which included the residential schools for the deaf. Black ASL differs from standard ASL in vocabulary, phonology, and some grammatical structure. While African American English (AAE) is generally viewed as more innovating than standard English, Black ASL is more conservative than standard ASL, preserving older forms of many signs. Black sign language speakers use more two-handed signs than in mainstream ASL, are less likely to show assimilatory lowering of signs produced on the forehead (e.g. KNOW) and use a wider signing space. Modern Black ASL borrows a number of idioms from AAE; for instance, the AAE idiom "I feel you" is calqued into Black ASL. ASL is used internationally as a lingua franca, and a number of closely related sign languages derived from ASL are used in many different countries. Even so, there have been varying degrees of divergence from standard ASL in those imported ASL varieties. Bolivian Sign Language is reported to be a dialect of ASL, no more divergent than other acknowledged dialects. On the other hand, it is also known that some imported ASL varieties have diverged to the extent of being separate languages. For example, Malaysian Sign Language, which has ASL origins, is no longer mutually comprehensible with ASL and must be considered its own language. For some imported ASL varieties, such as those used in West Africa, it is still an open question how similar they are to American ASL. When communicating with hearing English speakers, ASL-speakers often use what is commonly called Pidgin Signed English (PSE) or 'contact signing', a blend of English structure with ASL vocabulary. Various types of PSE exist, ranging from highly English-influenced PSE (practically relexified English) to PSE which is quite close to ASL lexically and grammatically, but may alter some subtle features of ASL grammar. Fingerspelling may be used more often in PSE than it is normally used in ASL. There have been some constructed sign languages, known as Manually Coded English (MCE), which match English grammar exactly and simply replace spoken words with signs; those systems are not considered to be varieties of ASL. Tactile ASL (TASL) is a variety of ASL used throughout the United States by and with the deaf-blind. It is particularly common among those with Usher's syndrome. It results in deafness from birth followed by loss of vision later in life; consequently, those with Usher's syndrome often grow up in the Deaf community using ASL, and later transition to TASL. TASL differs from ASL in that signs are produced by touching the palms, and there are some grammatical differences from standard ASL in order to compensate for the lack of nonmanual signing. ASL changes over time and from generation to generation. The sign for telephone has changed as the shape of phones and the manner of holding them have changed. The development of telephones with screens has also changed ASL, encouraging the use of signs that can be seen on small screens. Stigma In 2013, the White House published a response to a petition that gained over 37,000 signatures to officially recognize American Sign Language as a community language and a language of instruction in schools. The response is titled "there shouldn't be any stigma about American Sign Language" and addressed that ASL is a vital language for the Deaf and hard of hearing. Stigmas associated with sign languages and the use of sign for educating children often lead to the absence of sign during periods in children's lives when they can access languages most effectively. Scholars such as Beth S. Benedict advocate not only for bilingualism (using ASL and English training) but also for early childhood intervention for children who are deaf. York University psychologist Ellen Bialystok has also campaigned for bilingualism, arguing that those who are bilingual acquire cognitive skills that may help to prevent dementia later in life. Most children born to deaf parents are hearing. Known as CODAs ("Children Of Deaf Adults"), they are often more culturally Deaf than deaf children, most of whom are born to hearing parents. Unlike many deaf children, CODAs acquire ASL as well as Deaf cultural values and behaviors from birth. Such bilingual hearing children may be mistakenly labeled as being "slow learners" or as having "language difficulties" because of preferential attitudes towards spoken language. Writing systems Although there is no well-established writing system for ASL, written sign language dates back almost two centuries. The first systematic writing system for a sign language seems to be that of Roch-Ambroise Auguste Bébian, developed in 1825. However, written sign language remained marginal among the public. In the 1960s, linguist William Stokoe created Stokoe notation specifically for ASL. It is alphabetic, with a letter or diacritic for every phonemic (distinctive) hand shape, orientation, motion, and position, though it lacks any representation of facial expression, and is better suited for individual words than for extended passages of text. Stokoe used that system for his 1965 A Dictionary of American Sign Language on Linguistic Principles. SignWriting, proposed in 1974 by Valerie Sutton, is the first writing system to gain use among the public and the first writing system for sign languages to be included in the Unicode Standard. SignWriting consists of more than 5000 distinct iconic graphs/glyphs. Currently, it is in use in many schools for the Deaf, particularly in Brazil, and has been used in International Sign forums with speakers and researchers in more than 40 countries, including Brazil, Ethiopia, France, Germany, Italy, Portugal, Saudi Arabia, Slovenia, Tunisia, and the United States. Sutton SignWriting has both a printed and an electronically produced form so that persons can use the system anywhere that oral languages are written (personal letters, newspapers, and media, academic research). The systematic examination of the International Sign Writing Alphabet (ISWA) as an equivalent usage structure to the International Phonetic Alphabet for spoken languages has been proposed. According to some researchers, SignWriting is not a phonemic orthography and does not have a one-to-one map from phonological forms to written forms. That assertion has been disputed, and the process for each country to look at the ISWA and create a phonemic/morphemic assignment of features of each sign language was proposed by researchers Msc. Roberto Cesar Reis da Costa and Madson Barreto in a thesis forum on June 23, 2014. The SignWriting community has an open project on Wikimedia Labs to support the various Wikimedia projects on Wikimedia Incubator and elsewhere involving SignWriting. The ASL Wikipedia request was marked as eligible in 2008 and the test ASL Wikipedia has 50 articles written in ASL using SignWriting. The most widely used transcription system among academics is HamNoSys, developed at the University of Hamburg. Based on Stokoe Notation, HamNoSys was expanded to about 200 graphs in order to allow transcription of any sign language. Phonological features are usually indicated with single symbols, though the group of features that make up a handshape is indicated collectively with a symbol. Several additional candidates for written ASL have appeared over the years, including SignFont, ASL-phabet, and Si5s. For English-speaking audiences, ASL is often glossed using English words. Such glosses are typically all-capitalized and are arranged in ASL order. For example, the ASL sentence DOG NOW CHASE>IX=3 CAT, meaning "the dog is chasing the cat", uses NOW to mark ASL progressive aspect and shows ASL verbal inflection for the third person (>IX=3). However, glossing is not used to write the language for speakers of ASL. Phonology Each sign in ASL is composed of a number of distinctive components, generally referred to as parameters. A sign may use one hand or both. All signs can be described using the five parameters involved in signed languages, which are handshape, movement, palm orientation, location and nonmanual markers. Just as phonemes of sound distinguish meaning in spoken languages, those parameters are the phonemes that distinguish meaning in signed languages like ASL. Changing any one of them may change the meaning of a sign, as illustrated by the ASL signs THINK and DISAPPOINTED: There are also meaningful nonmanual signals in ASL, which may include movement of the eyebrows, the cheeks, the nose, the head, the torso, and the eyes. William Stokoe proposed that such components are analogous to the phonemes of spoken languages. There has also been a proposal that they are analogous to classes like place and manner of articulation. As in spoken languages, those phonological units can be split into distinctive features. For instance, the handshapes /2/ and /3/ are distinguished by the presence or absence of the feature [± closed thumb], as illustrated to the right. ASL has processes of allophony and phonotactic restrictions. There is ongoing research into whether ASL has an analog of syllables in spoken language. Grammar Morphology ASL has a rich system of verbal inflection, which involves both grammatical aspect: how the action of verbs flows in time—and agreement marking. Aspect can be marked by changing the manner of movement of the verb; for example, continuous aspect is marked by incorporating rhythmic, circular movement, while punctual aspect is achieved by modifying the sign so that it has a stationary hand position. Verbs may agree with both the subject and the object, and are marked for number and reciprocity. Reciprocity is indicated by using two one-handed signs; for example, the sign SHOOT, made with an L-shaped handshape with inward movement of the thumb, inflects to SHOOT[reciprocal], articulated by having two L-shaped hands "shooting" at each other. ASL has a productive system of classifiers, which are used to classify objects and their movement in space. For example, a rabbit running downhill would use a classifier consisting of a bent V classifier handshape with a downhill-directed path; if the rabbit is hopping, the path is executed with a bouncy manner. In general, classifiers are composed of a "classifier handshape" bound to a "movement root". The classifier handshape represents the object as a whole, incorporating such attributes as surface, depth, and shape, and is usually very iconic. The movement root consists of a path, a direction and a manner. In linguistics, there are two primary ways of changing the form of a word: derivation and inflection. Derivation involves creating new words by adding something to an existing word, while inflection involves changing the form of a word to convey grammatical information without altering its fundamental meaning or category. For example, adding the suffix "-ship" to the noun "friend" creates the new word "friendship", which has a different meaning than the original word. Inflection, on the other hand, involves modifying a word's form to indicate grammatical features such as tense, number, gender, person, case, and degree of comparison. In American Sign Language (ASL), inflection is conveyed through facial expressions, body movements, and other non-manual markers. For instance, to indicate past tense in ASL, one might sign the present tense of a verb (such as "walk"), and then add a facial expression and head tilt to signify that the action occurred in the past (i.e., "walked"). While inflection does not change the basic meaning or category of a word, it does provide additional information that helps us better understand how the word is being used in a sentence. This is similar to how subtitles in a movie provide additional information without altering the content of the film itself. According to the book Linguistics of American Sign Language, ASL signs have two main components: hold segments and movement segments. Hold segments consist of hand-shape, location, orientation, and non-manual features, while movement segments possess similar features. Morphology is the study of how languages form words by using smaller units to construct larger units. The smallest meaningful unit in a language is known as a "morpheme", with some morphemes able to stand alone as independent units (free morphemes), while others must occur with other morphemes (bound morphemes). For example, the plural "-s" and third person "-s" in English are bound morphemes. In ASL, the 3 handshape in signs like THREE-WEEKS and THREE-MONTHS are also bound morphemes. Affixes, which are morphemes added to words to create new words or modify their meanings, are part of the derivational process. For example, in English, prefixes like "re-" and suffixes like "-able" are affixes. In ASL, affixation can be used to modify the sign for CHAIR to indicate different types of chairs. The inflectional process, on the other hand, adds grammatical information to existing units. By studying morphemes and how they can be combined or modified, linguists gain insight into the underlying structure of language and the creative ways in which it can be used to express meaning. Understanding morphology is essential to understanding how languages are built and how new signs or words can be formed. Furthermore, understanding morphology has practical applications in language learning and teaching. For example, teaching students the basic morphological structures of a language can help them to better understand the language's grammar and syntax, and can also aid in their acquisition of new vocabulary. In summary, morphology is an essential component of language and provides valuable insights into the structure and function of languages. By understanding the morphological processes involved in language formation, we can gain a deeper understanding of how languages work and how they can be effectively taught and learned. Fingerspelling ASL possesses a set of 26 signs known as the American manual alphabet, which can be used to spell out words from the English language. Such signs make use of the 19 handshapes of ASL. For example, the signs for 'p' and 'k' use the same handshape but different orientations. A common misconception is that ASL consists only of fingerspelling; although such a method (Rochester Method) has been used, it is not ASL. Fingerspelling is a form of borrowing, a linguistic process wherein words from one language are incorporated into another. In ASL, fingerspelling is used for proper nouns and for technical terms with no native ASL equivalent. There are also some other loan words which are fingerspelled, either very short English words or abbreviations of longer English words, e.g. O-N from English 'on', and A-P-T from English 'apartment'. Fingerspelling may also be used to emphasize a word that would normally be signed otherwise. Syntax ASL is a subject–verb–object (SVO) language, but various phenomena affect that basic word order. Basic SVO sentences are signed without any pauses: However, other word orders may also occur since ASL allows the topic of a sentence to be moved to sentence-initial position, a phenomenon known as topicalization. In object–subject–verb (OSV) sentences, the object is topicalized, marked by a forward head-tilt and a pause: Besides, word orders can be obtained through the phenomenon of subject copy in which the subject is repeated at the end of the sentence, accompanied by head nodding for clarification or emphasis: ASL also allows null subject sentences whose subject is implied, rather than stated explicitly. Subjects can be copied even in a null subject sentence, and the subject is then omitted from its original position, yielding a verb–object–subject (VOS) construction: Topicalization, accompanied with a null subject and a subject copy, can produce yet another word order, object–verb–subject (OVS). Those properties of ASL allow it a variety of word orders, leading many to question which is the true, underlying, "basic" order. There are several other proposals that attempt to account for the flexibility of word order in ASL. One proposal is that languages like ASL are best described with a topic–comment structure whose words are ordered by their importance in the sentence, rather than by their syntactic properties. Another hypothesis is that ASL exhibits free word order, in which syntax is not encoded in word order but can be encoded by other means such as head nods, eyebrow movement, and body position. Iconicity Common misconceptions are that signs are iconically self-explanatory, that they are a transparent imitation of what they mean, or even that they are pantomime. In fact, many signs bear no resemblance to their referent because they were originally arbitrary symbols, or their iconicity has been obscured over time. Even so, in ASL iconicity plays a significant role; a high percentage of signs resemble their referents in some way. That may be because the medium of sign, three-dimensional space, naturally allows more iconicity than oral language. In the era of the influential linguist Ferdinand de Saussure, it was assumed that the mapping between form and meaning in language must be completely arbitrary. Although onomatopoeia is a clear exception, since words like 'choo-choo' bear clear resemblance to the sounds that they mimic, the Saussurean approach was to treat them as marginal exceptions. ASL, with its significant inventory of iconic signs, directly challenges that theory. Research on acquisition of pronouns in ASL has shown that children do not always take advantage of the iconic properties of signs when they interpret their meaning. It has been found that when children acquire the pronoun "you", the iconicity of the point (at the child) is often confused, being treated more like a name. That is a similar finding to research in oral languages on pronoun acquisition. It has also been found that iconicity of signs does not affect immediate memory and recall; less iconic signs are remembered just as well as highly-iconic signs. See also American Sign Language grammar American Sign Language literature Baby sign language Bimodal bilingualism Great ape language, of which ASL has been one attempted mode Legal recognition of sign languages Pointing Sign name ASL interpreting Notes References Bibliography External links Accessible American Sign Language vocabulary site American Sign Language discussion forum One-stop resource American Sign Language and video dictionary National Institute of Deafness ASL section National Association of the Deaf ASL information American Sign Language The American Sign Language Linguistics Research Project Video Dictionary of ASL American Sign Language Dictionary American Sign Language family Articles containing video clips Deaf culture in the United States French Sign Language family Fusional languages Languages of Barbados Languages of Belize Languages of Botswana Languages of Burundi Sign languages of Canada Languages of Grenada Languages of Guyana Languages of Haiti Languages of Saint Kitts and Nevis Languages of Saint Vincent and the Grenadines Languages of the United States Virgin Islands Sign languages of the United States Languages of Zimbabwe Subject–verb–object languages 1817 introductions Languages attested from the 19th century Languages of Canada Languages of the United States

1202

https://en.wikipedia.org/wiki/Applet

Applet

In computing, an applet is any small application that performs one specific task that runs within the scope of a dedicated widget engine or a larger program, often as a plug-in. The term is frequently used to refer to a Java applet, a program written in the Java programming language that is designed to be placed on a web page. Applets are typical examples of transient and auxiliary applications that do not monopolize the user's attention. Applets are not full-featured application programs, and are intended to be easily accessible. History The word applet was first used in 1990 in PC Magazine. However, the concept of an applet, or more broadly a small interpreted program downloaded and executed by the user, dates at least to RFC 5 (1969) by Jeff Rulifson, which described the Decode-Encode Language, which was designed to allow remote use of the oN-Line System over ARPANET, by downloading small programs to enhance the interaction. This has been specifically credited as a forerunner of Java's downloadable programs in RFC 2555. Applet as an extension of other software In some cases, an applet does not run independently. These applets must run either in a container provided by a host program, through a plugin, or a variety of other applications including mobile devices that support the applet programming model. Web-based applets Applets were used to provide interactive features to web applications that historically could not be provided by HTML alone. They could capture mouse input and also had controls like buttons or check boxes. In response to the user action, an applet could change the provided graphic content. This made applets well suited for demonstration, visualization, and teaching. There were online applet collections for studying various subjects, from physics to heart physiology. Applets were also used to create online game collections that allowed players to compete against live opponents in real-time. An applet could also be a text area only, providing, for instance, a cross-platform command-line interface to some remote system. If needed, an applet could leave the dedicated area and run as a separate window. However, applets had very little control over web page content outside the applet dedicated area, so they were less useful for improving the site appearance in general (while applets like news tickers or WYSIWYG editors are also known). Applets could also play media in formats that are not natively supported by the browser. HTML pages could embed parameters that were passed to the applet. Hence, the same applet could appear differently depending on the parameters that were passed. Examples of Web-based applets include: QuickTime movies Flash movies Windows Media Player applets, used to display embedded video files in Internet Explorer (and other browsers that supported the plugin) 3D modeling display applets, used to rotate and zoom a model Browser games that were applet-based, though some developed into fully functional applications that required installation. Applet Vs. Subroutine A larger application distinguishes its applets through several features: Applets execute only on the "client" platform environment of a system, as contrasted from "Servlet". As such, an applet provides functionality or performance beyond the default capabilities of its container (the browser). The container restricts applets' capabilities. Applets are written in a language different from the scripting or HTML language that invokes it. The applet is written in a compiled language, whereas the scripting language of the container is an interpreted language, hence the greater performance or functionality of the applet. Unlike a subroutine, a complete web component can be implemented as an applet. Java applets A Java applet is a Java program that is launched from HTML and run in a web browser. It takes code from server and run in a web browser. It can provide web applications with interactive features that cannot be provided by HTML. Since Java's bytecode is platform-independent, Java applets can be executed by browsers running under many platforms, including Windows, Unix, macOS, and Linux. When a Java technology-enabled web browser processes a page that contains an applet, the applet's code is transferred to the client's system and executed by the browser's Java virtual machine. An HTML page references an applet either via the deprecated tag or via its replacement, the tag. Security Recent developments in the coding of applications, including mobile and embedded systems, have led to the awareness of the security of applets. Open platform applets Applets in an open platform environment should provide secure interactions between different applications. A compositional approach can be used to provide security for open platform applets. Advanced compositional verification methods have been developed for secure applet interactions. Java applets A Java applet contains different security models: unsigned Java applet security, signed Java applet security, and self-signed Java applet security. Web-based applets In an applet-enabled web browser, many methods can be used to provide applet security for malicious applets. A malicious applet can infect a computer system in many ways, including denial of service, invasion of privacy, and annoyance. A typical solution for malicious applets is to make the web browser to monitor applets' activities. This will result in a web browser that will enable the manual or automatic stopping of malicious applets. See also Application posture Bookmarklet Java applet Widget engine Abstract Window Toolkit References External links Technology neologisms Component-based software engineering Java (programming language) libraries

1206

https://en.wikipedia.org/wiki/Atomic%20orbital

Atomic orbital

In atomic theory and quantum mechanics, an atomic orbital () is a function describing the location and wave-like behavior of an electron in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus. The term atomic orbital may also refer to the physical region or space where the electron can be calculated to be present, as predicted by the particular mathematical form of the orbital. Each orbital in an atom is characterized by a set of values of the three quantum numbers , , and , which respectively correspond to the electron's energy, its angular momentum, and an angular momentum vector component (magnetic quantum number). As an alternative to the magnetic quantum number, the orbitals are often labeled by the associated harmonic polynomials (e.g., xy, ). Each such orbital can be occupied by a maximum of two electrons, each with its own projection of spin . The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number and respectively. These names, together with the value of , are used to describe the electron configurations of atoms. They are derived from the description by early spectroscopists of certain series of alkali metal spectroscopic lines as sharp, principal, diffuse, and fundamental. Orbitals for > 3 continue alphabetically (g, h, i, k, ...), omitting j because some languages do not distinguish between the letters "i" and "j". Atomic orbitals are the basic building blocks of the atomic orbital model (or electron cloud or wave mechanics model), a modern framework for visualizing the submicroscopic behavior of electrons in matter. In this model the electron cloud of an atom may be seen as being built up (in approximation) in an electron configuration that is a product of simpler hydrogen-like atomic orbitals. The repeating periodicity of blocks of 2, 6, 10, and 14 elements within sections of the periodic table arises naturally from the total number of electrons that occupy a complete set of s, p, d, and f orbitals, respectively, though for higher values of quantum number , particularly when the atom bears a positive charge, the energies of certain sub-shells become very similar and so the order in which they are said to be populated by electrons (e.g., Cr = [Ar]4s13d5 and Cr2+ = [Ar]3d4) can be rationalized only somewhat arbitrarily. Electron properties With the development of quantum mechanics and experimental findings (such as the two slit diffraction of electrons), it was found that the electrons orbiting a nucleus could not be fully described as particles, but needed to be explained by wave–particle duality. In this sense, electrons have the following properties: Wave-like properties: Electrons do not orbit a nucleus in the manner of a planet orbiting the Sun, but instead exist as standing waves. Thus the lowest possible energy an electron can take is similar to the fundamental frequency of a wave on a string. Higher energy states are similar to harmonics of that fundamental frequency. The electrons are never in a single point location, though the probability of interacting with the electron at a single point can be found from the electron's wave function. The electron's charge acts like it is smeared out in space in a continuous distribution, proportional at any point to the squared magnitude of the electron's wave function. Particle-like properties: The number of electrons orbiting a nucleus can be only an integer. Electrons jump between orbitals like particles. For example, if one photon strikes the electrons, only one electron changes state as a result. Electrons retain particle-like properties such as: each wave state has the same electric charge as its electron particle. Each wave state has a single discrete spin (spin up or spin down) depending on its superposition. Thus, electrons cannot be described simply as solid particles. An analogy might be that of a large and often oddly shaped "atmosphere" (the electron), distributed around a relatively tiny planet (the nucleus). Atomic orbitals exactly describe the shape of this "atmosphere" only when one electron is present. When more electrons are added, the additional electrons tend to more evenly fill in a volume of space around the nucleus so that the resulting collection ("electron cloud") tends toward a generally spherical zone of probability describing the electron's location, because of the uncertainty principle. Formal quantum mechanical definition Atomic orbitals may be defined more precisely in formal quantum mechanical language. They are approximate solutions to the Schrödinger equation for the electrons bound to the atom by the electric field of the atom's nucleus. Specifically, in quantum mechanics, the state of an atom, i.e., an eigenstate of the atomic Hamiltonian, is approximated by an expansion (see configuration interaction expansion and basis set) into linear combinations of anti-symmetrized products (Slater determinants) of one-electron functions. The spatial components of these one-electron functions are called atomic orbitals. (When one considers also their spin component, one speaks of atomic spin orbitals.) A state is actually a function of the coordinates of all the electrons, so that their motion is correlated, but this is often approximated by this independent-particle model of products of single electron wave functions. (The London dispersion force, for example, depends on the correlations of the motion of the electrons.) In atomic physics, the atomic spectral lines correspond to transitions (quantum leaps) between quantum states of an atom. These states are labeled by a set of quantum numbers summarized in the term symbol and usually associated with particular electron configurations, i.e., by occupation schemes of atomic orbitals (for example, 1s2 2s2 2p6 for the ground state of neon-term symbol: 1S0). This notation means that the corresponding Slater determinants have a clear higher weight in the configuration interaction expansion. The atomic orbital concept is therefore a key concept for visualizing the excitation process associated with a given transition. For example, one can say for a given transition that it corresponds to the excitation of an electron from an occupied orbital to a given unoccupied orbital. Nevertheless, one has to keep in mind that electrons are fermions ruled by the Pauli exclusion principle and cannot be distinguished from each other. Moreover, it sometimes happens that the configuration interaction expansion converges very slowly and that one cannot speak about simple one-determinant wave function at all. This is the case when electron correlation is large. Fundamentally, an atomic orbital is a one-electron wave function, even though many electrons are not in one-electron atoms, and so the one-electron view is an approximation. When thinking about orbitals, we are often given an orbital visualization heavily influenced by the Hartree–Fock approximation, which is one way to reduce the complexities of molecular orbital theory. Types of orbital Atomic orbitals can be the hydrogen-like "orbitals" which are exact solutions to the Schrödinger equation for a hydrogen-like "atom" (i.e., atom with one electron). Alternatively, atomic orbitals refer to functions that depend on the coordinates of one electron (i.e., orbitals) but are used as starting points for approximating wave functions that depend on the simultaneous coordinates of all the electrons in an atom or molecule. The coordinate systems chosen for orbitals are usually spherical coordinates in atoms and Cartesian in polyatomic molecules. The advantage of spherical coordinates here is that an orbital wave function is a product of three factors each dependent on a single coordinate: . The angular factors of atomic orbitals generate s, p, d, etc. functions as real combinations of spherical harmonics (where and are quantum numbers). There are typically three mathematical forms for the radial functions  which can be chosen as a starting point for the calculation of the properties of atoms and molecules with many electrons: The hydrogen-like orbitals are derived from the exact solutions of the Schrödinger equation for one electron and a nucleus, for a hydrogen-like atom. The part of the function that depends on distance r from the nucleus has radial nodes and decays as . The Slater-type orbital (STO) is a form without radial nodes but decays from the nucleus as does a hydrogen-like orbital. The form of the Gaussian type orbital (Gaussians) has no radial nodes and decays as . Although hydrogen-like orbitals are still used as pedagogical tools, the advent of computers has made STOs preferable for atoms and diatomic molecules since combinations of STOs can replace the nodes in hydrogen-like orbitals. Gaussians are typically used in molecules with three or more atoms. Although not as accurate by themselves as STOs, combinations of many Gaussians can attain the accuracy of hydrogen-like orbitals. History The term "orbital" was coined by Robert S. Mulliken in 1932 as short for one-electron orbital wave function. Niels Bohr explained around 1913 that electrons might revolve around a compact nucleus with definite angular momentum. Bohr's model was an improvement on the 1911 explanations of Ernest Rutherford, that of the electron moving around a nucleus. Japanese physicist Hantaro Nagaoka published an orbit-based hypothesis for electron behavior as early as 1904. These theories were each built upon new observations starting with simple understanding and becoming more correct and complex. Explaining the behavior of these electron "orbits" was one of the driving forces behind the development of quantum mechanics. Early models With J. J. Thomson's discovery of the electron in 1897, it became clear that atoms were not the smallest building blocks of nature, but were rather composite particles. The newly discovered structure within atoms tempted many to imagine how the atom's constituent parts might interact with each other. Thomson theorized that multiple electrons revolve in orbit-like rings within a positively charged jelly-like substance, and between the electron's discovery and 1909, this "plum pudding model" was the most widely accepted explanation of atomic structure. Shortly after Thomson's discovery, Hantaro Nagaoka predicted a different model for electronic structure. Unlike the plum pudding model, the positive charge in Nagaoka's "Saturnian Model" was concentrated into a central core, pulling the electrons into circular orbits reminiscent of Saturn's rings. Few people took notice of Nagaoka's work at the time, and Nagaoka himself recognized a fundamental defect in the theory even at its conception, namely that a classical charged object cannot sustain orbital motion because it is accelerating and therefore loses energy due to electromagnetic radiation. Nevertheless, the Saturnian model turned out to have more in common with modern theory than any of its contemporaries. Bohr atom In 1909, Ernest Rutherford discovered that the bulk of the atomic mass was tightly condensed into a nucleus, which was also found to be positively charged. It became clear from his analysis in 1911 that the plum pudding model could not explain atomic structure. In 1913, Rutherford's post-doctoral student, Niels Bohr, proposed a new model of the atom, wherein electrons orbited the nucleus with classical periods, but were permitted to have only discrete values of angular momentum, quantized in units ħ. This constraint automatically allowed only certain electron energies. The Bohr model of the atom fixed the problem of energy loss from radiation from a ground state (by declaring that there was no state below this), and more importantly explained the origin of spectral lines. After Bohr's use of Einstein's explanation of the photoelectric effect to relate energy levels in atoms with the wavelength of emitted light, the connection between the structure of electrons in atoms and the emission and absorption spectra of atoms became an increasingly useful tool in the understanding of electrons in atoms. The most prominent feature of emission and absorption spectra (known experimentally since the middle of the 19th century), was that these atomic spectra contained discrete lines. The significance of the Bohr model was that it related the lines in emission and absorption spectra to the energy differences between the orbits that electrons could take around an atom. This was, however, not achieved by Bohr through giving the electrons some kind of wave-like properties, since the idea that electrons could behave as matter waves was not suggested until eleven years later. Still, the Bohr model's use of quantized angular momenta and therefore quantized energy levels was a significant step toward the understanding of electrons in atoms, and also a significant step towards the development of quantum mechanics in suggesting that quantized restraints must account for all discontinuous energy levels and spectra in atoms. With de Broglie's suggestion of the existence of electron matter waves in 1924, and for a short time before the full 1926 Schrödinger equation treatment of hydrogen-like atoms, a Bohr electron "wavelength" could be seen to be a function of its momentum; so a Bohr orbiting electron was seen to orbit in a circle at a multiple of its half-wavelength. The Bohr model for a short time could be seen as a classical model with an additional constraint provided by the 'wavelength' argument. However, this period was immediately superseded by the full three-dimensional wave mechanics of 1926. In our current understanding of physics, the Bohr model is called a semi-classical model because of its quantization of angular momentum, not primarily because of its relationship with electron wavelength, which appeared in hindsight a dozen years after the Bohr model was proposed. The Bohr model was able to explain the emission and absorption spectra of hydrogen. The energies of electrons in the n = 1, 2, 3, etc. states in the Bohr model match those of current physics. However, this did not explain similarities between different atoms, as expressed by the periodic table, such as the fact that helium (two electrons), neon (10 electrons), and argon (18 electrons) exhibit similar chemical inertness. Modern quantum mechanics explains this in terms of electron shells and subshells which can each hold a number of electrons determined by the Pauli exclusion principle. Thus the n = 1 state can hold one or two electrons, while the n = 2 state can hold up to eight electrons in 2s and 2p subshells. In helium, all n = 1 states are fully occupied; the same is true for n = 1 and n = 2 in neon. In argon, the 3s and 3p subshells are similarly fully occupied by eight electrons; quantum mechanics also allows a 3d subshell but this is at higher energy than the 3s and 3p in argon (contrary to the situation for hydrogen) and remains empty. Modern conceptions and connections to the Heisenberg uncertainty principle Immediately after Heisenberg discovered his uncertainty principle, Bohr noted that the existence of any sort of wave packet implies uncertainty in the wave frequency and wavelength, since a spread of frequencies is needed to create the packet itself. In quantum mechanics, where all particle momenta are associated with waves, it is the formation of such a wave packet which localizes the wave, and thus the particle, in space. In states where a quantum mechanical particle is bound, it must be localized as a wave packet, and the existence of the packet and its minimum size implies a spread and minimal value in particle wavelength, and thus also momentum and energy. In quantum mechanics, as a particle is localized to a smaller region in space, the associated compressed wave packet requires a larger and larger range of momenta, and thus larger kinetic energy. Thus the binding energy to contain or trap a particle in a smaller region of space increases without bound as the region of space grows smaller. Particles cannot be restricted to a geometric point in space, since this would require infinite particle momentum. In chemistry, Erwin Schrödinger, Linus Pauling, Mulliken and others noted that the consequence of Heisenberg's relation was that the electron, as a wave packet, could not be considered to have an exact location in its orbital. Max Born suggested that the electron's position needed to be described by a probability distribution which was connected with finding the electron at some point in the wave-function which described its associated wave packet. The new quantum mechanics did not give exact results, but only the probabilities for the occurrence of a variety of possible such results. Heisenberg held that the path of a moving particle has no meaning if we cannot observe it, as we cannot with electrons in an atom. In the quantum picture of Heisenberg, Schrödinger and others, the Bohr atom number n for each orbital became known as an n-sphere in a three-dimensional atom and was pictured as the most probable energy of the probability cloud of the electron's wave packet which surrounded the atom. Orbital names Orbital notation and subshells Orbitals have been given names, which are usually given in the form: where X is the energy level corresponding to the principal quantum number ; type is a lower-case letter denoting the shape or subshell of the orbital, corresponding to the angular momentum quantum number . For example, the orbital 1s (pronounced as the individual numbers and letters: "'one' 'ess'") is the lowest energy level () and has an angular quantum number of , denoted as s. Orbitals with are denoted as p, d and f respectively. The set of orbitals for a given n and is called a subshell, denoted . The superscript y shows the number of electrons in the subshell. For example, the notation 2p4 indicates that the 2p subshell of an atom contains 4 electrons. This subshell has 3 orbitals, each with n = 2 and = 1. X-ray notation There is also another, less common system still used in X-ray science known as X-ray notation, which is a continuation of the notations used before orbital theory was well understood. In this system, the principal quantum number is given a letter associated with it. For , the letters associated with those numbers are K, L, M, N, O, ... respectively. Hydrogen-like orbitals The simplest atomic orbitals are those that are calculated for systems with a single electron, such as the hydrogen atom. An atom of any other element ionized down to a single electron is very similar to hydrogen, and the orbitals take the same form. In the Schrödinger equation for this system of one negative and one positive particle, the atomic orbitals are the eigenstates of the Hamiltonian operator for the energy. They can be obtained analytically, meaning that the resulting orbitals are products of a polynomial series, and exponential and trigonometric functions. (see hydrogen atom). For atoms with two or more electrons, the governing equations can be solved only with the use of methods of iterative approximation. Orbitals of multi-electron atoms are qualitatively similar to those of hydrogen, and in the simplest models, they are taken to have the same form. For more rigorous and precise analysis, numerical approximations must be used. A given (hydrogen-like) atomic orbital is identified by unique values of three quantum numbers: , , and . The rules restricting the values of the quantum numbers, and their energies (see below), explain the electron configuration of the atoms and the periodic table. The stationary states (quantum states) of the hydrogen-like atoms are its atomic orbitals. However, in general, an electron's behavior is not fully described by a single orbital. Electron states are best represented by time-depending "mixtures" (linear combinations) of multiple orbitals. See Linear combination of atomic orbitals molecular orbital method. The quantum number first appeared in the Bohr model where it determines the radius of each circular electron orbit. In modern quantum mechanics however, determines the mean distance of the electron from the nucleus; all electrons with the same value of n lie at the same average distance. For this reason, orbitals with the same value of n are said to comprise a "shell". Orbitals with the same value of n and also the same value of  are even more closely related, and are said to comprise a "subshell". Quantum numbers Because of the quantum mechanical nature of the electrons around a nucleus, atomic orbitals can be uniquely defined by a set of integers known as quantum numbers. These quantum numbers occur only in certain combinations of values, and their physical interpretation changes depending on whether real or complex versions of the atomic orbitals are employed. Complex orbitals In physics, the most common orbital descriptions are based on the solutions to the hydrogen atom, where orbitals are given by the product between a radial function and a pure spherical harmonic. The quantum numbers, together with the rules governing their possible values, are as follows: The principal quantum number describes the energy of the electron and is always a positive integer. In fact, it can be any positive integer, but for reasons discussed below, large numbers are seldom encountered. Each atom has, in general, many orbitals associated with each value of n; these orbitals together are sometimes called electron shells. The azimuthal quantum number describes the orbital angular momentum of each electron and is a non-negative integer. Within a shell where is some integer , ranges across all (integer) values satisfying the relation . For instance, the  shell has only orbitals with , and the  shell has only orbitals with , and . The set of orbitals associated with a particular value of  are sometimes collectively called a subshell. The magnetic quantum number, , describes the magnetic moment of an electron in an arbitrary direction, and is also always an integer. Within a subshell where is some integer , ranges thus: . The above results may be summarized in the following table. Each cell represents a subshell, and lists the values of available in that subshell. Empty cells represent subshells that do not exist. Subshells are usually identified by their - and -values. is represented by its numerical value, but is represented by a letter as follows: 0 is represented by 's', 1 by 'p', 2 by 'd', 3 by 'f', and 4 by 'g'. For instance, one may speak of the subshell with and as a '2s subshell'. Each electron also has a spin quantum number, s, which describes the spin of each electron (spin up or spin down). The number s can be + or −. The Pauli exclusion principle states that no two electrons in an atom can have the same values of all four quantum numbers. If there are two electrons in an orbital with given values for three quantum numbers, (, , ), these two electrons must differ in their spin. The above conventions imply a preferred axis (for example, the z direction in Cartesian coordinates), and they also imply a preferred direction along this preferred axis. Otherwise there would be no sense in distinguishing from . As such, the model is most useful when applied to physical systems that share these symmetries. The Stern–Gerlach experimentwhere an atom is exposed to a magnetic fieldprovides one such example. Real orbitals In addition to the complex orbitals described above, it is common, especially in the chemistry literature, to use real atomic orbitals. These real orbitals arise from simple linear combinations of complex orbitals. Using the Condon–Shortley phase convention, real orbitals are related to complex orbitals in the same way that the real spherical harmonics are related to complex spherical harmonics. Letting denote a complex orbital with quantum numbers , , and , the real orbitals may be defined by If , with the radial part of the orbital, this definition is equivalent to where is the real spherical harmonic related to either the real or imaginary part of the complex spherical harmonic . Real spherical harmonics are physically relevant when an atom is embedded in a crystalline solid, in which case there are multiple preferred symmetry axes but no single preferred direction. Real atomic orbitals are also more frequently encountered in introductory chemistry textbooks and shown in common orbital visualizations. In real hydrogen-like orbitals, quantum numbers and have the same interpretation and significance as their complex counterparts, but is no longer a good quantum number (but its absolute value is). Some real orbitals are given specific names beyond the simple designation. Orbitals with quantum number equal to are called orbitals. With this one can already assign names to complex orbitals such as ; the first symbol is the quantum number, the second character is the symbol for that particular quantum number and the subscript is the quantum number. As an example of how the full orbital names are generated for real orbitals, one may calculate . From the table of spherical harmonics, with . Then Likewise . As a more complicated example: In all these cases we generate a Cartesian label for the orbital by examining, and abbreviating, the polynomial in , , and appearing in the numerator. We ignore any terms in the polynomial except for the term with the highest exponent in . We then use the abbreviated polynomial as a subscript label for the atomic state, using the same nomenclature as above to indicate the and quantum numbers. The expression above all use the Condon–Shortley phase convention which is favored by quantum physicists. Other conventions exist for the phase of the spherical harmonics. Under these different conventions the and orbitals may appear, for example, as the sum and difference of and , contrary to what is shown above. Below is a list of these Cartesian polynomial names for the atomic orbitals. Note that there does not seem to be reference in the literature as to how to abbreviate the long Cartesian spherical harmonic polynomials for so there does not seem be consensus on the naming of orbitals or higher according to this nomenclature. Shapes of orbitals Simple pictures showing orbital shapes are intended to describe the angular forms of regions in space where the electrons occupying the orbital are likely to be found. The diagrams cannot show the entire region where an electron can be found, since according to quantum mechanics there is a non-zero probability of finding the electron (almost) anywhere in space. Instead the diagrams are approximate representations of boundary or contour surfaces where the probability density has a constant value, chosen so that there is a certain probability (for example 90%) of finding the electron within the contour. Although as the square of an absolute value is everywhere non-negative, the sign of the wave function is often indicated in each subregion of the orbital picture. Sometimes the function is graphed to show its phases, rather than which shows probability density but has no phase (which is lost when taking absolute value, since is a complex number). orbital graphs tend to have less spherical, thinner lobes than graphs, but have the same number of lobes in the same places, and otherwise are recognizable. This article, to show wave function phase, shows mostly graphs. The lobes can be seen as standing wave interference patterns between the two counter rotating, ring resonant traveling wave and modes; the projection of the orbital onto the xy plane has a resonant wavelength around the circumference. Although rarely shown, the traveling wave solutions can be seen as rotating banded tori; the bands represent phase information. For each there are two standing wave solutions and . If , the orbital is vertical, counter rotating information is unknown, and the orbital is z-axis symmetric. If there are no counter rotating modes. There are only radial modes and the shape is spherically symmetric. For any given , the smaller is, the more radial nodes there are. For any given , the smaller is, the fewer radial nodes there are (zero for whichever first has that orbital). Loosely speaking, is energy, is analogous to eccentricity, and is orientation. In the classical case, a ring resonant traveling wave, for example in a circular transmission line, unless actively forced, spontaneously decays into a ring resonant standing wave because reflections build up over time at even the smallest imperfection or discontinuity. In general, determines size and energy of the orbital for a given nucleus; as increases, the size of the orbital increases. The higher nuclear charge of heavier elements causes their orbitals to contract by comparison to lighter ones, so that the size of the atom remains very roughly constant, even as the number of electrons increases. Also in general terms, determines an orbital's shape, and its orientation. However, since some orbitals are described by equations in complex numbers, the shape sometimes depends on also. Together, the whole set of orbitals for a given and fill space as symmetrically as possible, though with increasingly complex sets of lobes and nodes. The single s orbitals () are shaped like spheres. For it is roughly a solid ball (densest at center and fades outward exponentially), but for , each single s orbital is made of spherically symmetric surfaces which are nested shells (i.e., the "wave-structure" is radial, following a sinusoidal radial component as well). See illustration of a cross-section of these nested shells, at right. The s orbitals for all numbers are the only orbitals with an anti-node (a region of high wave function density) at the center of the nucleus. All other orbitals (p, d, f, etc.) have angular momentum, and thus avoid the nucleus (having a wave node at the nucleus). Recently, there has been an effort to experimentally image the 1s and 2p orbitals in a SrTiO3 crystal using scanning transmission electron microscopy with energy dispersive x-ray spectroscopy. Because the imaging was conducted using an electron beam, Coulombic beam-orbital interaction that is often termed as the impact parameter effect is included in the outcome (see the figure at right). The shapes of p, d and f orbitals are described verbally here and shown graphically in the Orbitals table below. The three p orbitals for have the form of two ellipsoids with a point of tangency at the nucleus (the two-lobed shape is sometimes referred to as a "dumbbell"—there are two lobes pointing in opposite directions from each other). The three p orbitals in each shell are oriented at right angles to each other, as determined by their respective linear combination of values of . The overall result is a lobe pointing along each direction of the primary axes. Four of the five d orbitals for look similar, each with four pear-shaped lobes, each lobe tangent at right angles to two others, and the centers of all four lying in one plane. Three of these planes are the xy-, xz-, and yz-planes—the lobes are between the pairs of primary axes—and the fourth has the center along the x and y axes themselves. The fifth and final d orbital consists of three regions of high probability density: a torus in between two pear-shaped regions placed symmetrically on its z axis. The overall total of 18 directional lobes point in every primary axis direction and between every pair. There are seven f orbitals, each with shapes more complex than those of the d orbitals. Additionally, as is the case with the s orbitals, individual p, d, f and g orbitals with values higher than the lowest possible value, exhibit an additional radial node structure which is reminiscent of harmonic waves of the same type, as compared with the lowest (or fundamental) mode of the wave. As with s orbitals, this phenomenon provides p, d, f, and g orbitals at the next higher possible value of (for example, 3p orbitals vs. the fundamental 2p), an additional node in each lobe. Still higher values of further increase the number of radial nodes, for each type of orbital. The shapes of atomic orbitals in one-electron atom are related to 3-dimensional spherical harmonics. These shapes are not unique, and any linear combination is valid, like a transformation to cubic harmonics, in fact it is possible to generate sets where all the d's are the same shape, just like the and are the same shape. Although individual orbitals are most often shown independent of each other, the orbitals coexist around the nucleus at the same time. Also, in 1927, Albrecht Unsöld proved that if one sums the electron density of all orbitals of a particular azimuthal quantum number of the same shell (e.g., all three 2p orbitals, or all five 3d orbitals) where each orbital is occupied by an electron or each is occupied by an electron pair, then all angular dependence disappears; that is, the resulting total density of all the atomic orbitals in that subshell (those with the same ) is spherical. This is known as Unsöld's theorem. Orbitals table This table shows the real hydrogen-like wave functions for all atomic orbitals up to 7s, and therefore covers the occupied orbitals in the ground state of all elements in the periodic table up to radium and some beyond. "ψ" graphs are shown with − and + wave function phases shown in two different colors (arbitrarily red and blue). The orbital is the same as the orbital, but the and are formed by taking linear combinations of the and orbitals (which is why they are listed under the label). Also, the and are not the same shape as the , since they are pure spherical harmonics. * No elements with 6f, 7d or 7f electrons have been discovered yet. † Elements with 7p electrons have been discovered, but their electronic configurations are only predicted. ‡ For the elements whose highest occupied orbital is a 6d orbital, only some electronic configurations have been confirmed. (Ds, Rg and Cn are still missing). These are the real-valued orbitals commonly used in chemistry. Only the orbitals where are eigenstates of the orbital angular momentum operator, . The columns with are combinations of two eigenstates. See comparison in the following picture: Qualitative understanding of shapes The shapes of atomic orbitals can be qualitatively understood by considering the analogous case of standing waves on a circular drum. To see the analogy, the mean vibrational displacement of each bit of drum membrane from the equilibrium point over many cycles (a measure of average drum membrane velocity and momentum at that point) must be considered relative to that point's distance from the center of the drum head. If this displacement is taken as being analogous to the probability of finding an electron at a given distance from the nucleus, then it will be seen that the many modes of the vibrating disk form patterns that trace the various shapes of atomic orbitals. The basic reason for this correspondence lies in the fact that the distribution of kinetic energy and momentum in a matter-wave is predictive of where the particle associated with the wave will be. That is, the probability of finding an electron at a given place is also a function of the electron's average momentum at that point, since high electron momentum at a given position tends to "localize" the electron in that position, via the properties of electron wave-packets (see the Heisenberg uncertainty principle for details of the mechanism). This relationship means that certain key features can be observed in both drum membrane modes and atomic orbitals. For example, in all of the modes analogous to s orbitals (the top row in the animated illustration below), it can be seen that the very center of the drum membrane vibrates most strongly, corresponding to the antinode in all s orbitals in an atom. This antinode means the electron is most likely to be at the physical position of the nucleus (which it passes straight through without scattering or striking it), since it is moving (on average) most rapidly at that point, giving it maximal momentum. A mental "planetary orbit" picture closest to the behavior of electrons in s orbitals, all of which have no angular momentum, might perhaps be that of a Keplerian orbit with the orbital eccentricity of 1 but a finite major axis, not physically possible (because particles were to collide), but can be imagined as a limit of orbits with equal major axes but increasing eccentricity. Below, a number of drum membrane vibration modes and the respective wave functions of the hydrogen atom are shown. A correspondence can be considered where the wave functions of a vibrating drum head are for a two-coordinate system and the wave functions for a vibrating sphere are three-coordinate . None of the other sets of modes in a drum membrane have a central antinode, and in all of them the center of the drum does not move. These correspond to a node at the nucleus for all non-s orbitals in an atom. These orbitals all have some angular momentum, and in the planetary model, they correspond to particles in orbit with eccentricity less than 1.0, so that they do not pass straight through the center of the primary body, but keep somewhat away from it. In addition, the drum modes analogous to p and d modes in an atom show spatial irregularity along the different radial directions from the center of the drum, whereas all of the modes analogous to s modes are perfectly symmetrical in radial direction. The non-radial-symmetry properties of non-s orbitals are necessary to localize a particle with angular momentum and a wave nature in an orbital where it must tend to stay away from the central attraction force, since any particle localized at the point of central attraction could have no angular momentum. For these modes, waves in the drum head tend to avoid the central point. Such features again emphasize that the shapes of atomic orbitals are a direct consequence of the wave nature of electrons. Orbital energy In atoms with one electron (hydrogen-like atom), the energy of an orbital (and, consequently, any electron in the orbital) is determined mainly by . The orbital has the lowest possible energy in the atom. Each successively higher value of has a higher energy, but the difference decreases as increases. For high , the energy becomes so high that the electron can easily escape the atom. In single electron atoms, all levels with different within a given are degenerate in the Schrödinger approximation, and have the same energy. This approximation is broken slightly in the solution to the Dirac equation (where energy depends on and another quantum number ), and by the effect of the magnetic field of the nucleus and quantum electrodynamics effects. The latter induce tiny binding energy differences especially for s electrons that go nearer the nucleus, since these feel a very slightly different nuclear charge, even in one-electron atoms; see Lamb shift. In atoms with multiple electrons, the energy of an electron depends not only on its orbital, but also on its interactions with other electrons. These interactions depend on the detail of its spatial probability distribution, and so the energy levels of orbitals depend not only on but also on . Higher values of are associated with higher values of energy; for instance, the 2p state is higher than the 2s state. When , the increase in energy of the orbital becomes so large as to push the energy of orbital above the energy of the s orbital in the next higher shell; when the energy is pushed into the shell two steps higher. The filling of the 3d orbitals does not occur until the 4s orbitals have been filled. The increase in energy for subshells of increasing angular momentum in larger atoms is due to electron–electron interaction effects, and it is specifically related to the ability of low angular momentum electrons to penetrate more effectively toward the nucleus, where they are subject to less screening from the charge of intervening electrons. Thus, in atoms with higher atomic number, the of electrons becomes more and more of a determining factor in their energy, and the principal quantum numbers of electrons becomes less and less important in their energy placement. The energy sequence of the first 35 subshells (e.g., 1s, 2p, 3d, etc.) is given in the following table. Each cell represents a subshell with and given by its row and column indices, respectively. The number in the cell is the subshell's position in the sequence. For a linear listing of the subshells in terms of increasing energies in multielectron atoms, see the section below. Note: empty cells indicate non-existent sublevels, while numbers in italics indicate sublevels that could (potentially) exist, but which do not hold electrons in any element currently known. Electron placement and the periodic table Several rules govern the placement of electrons in orbitals (electron configuration). The first dictates that no two electrons in an atom may have the same set of values of quantum numbers (this is the Pauli exclusion principle). These quantum numbers include the three that define orbitals, as well as , or spin quantum number. Thus, two electrons may occupy a single orbital, so long as they have different values of . However, only two electrons, because of their spin, can be associated with each orbital. Additionally, an electron always tends to fall to the lowest possible energy state. It is possible for it to occupy any orbital so long as it does not violate the Pauli exclusion principle, but if lower-energy orbitals are available, this condition is unstable. The electron will eventually lose energy (by releasing a photon) and drop into the lower orbital. Thus, electrons fill orbitals in the order specified by the energy sequence given above. This behavior is responsible for the structure of the periodic table. The table may be divided into several rows (called 'periods'), numbered starting with 1 at the top. The presently known elements occupy seven periods. If a certain period has number i, it consists of elements whose outermost electrons fall in the ith shell. Niels Bohr was the first to propose (1923) that the periodicity in the properties of the elements might be explained by the periodic filling of the electron energy levels, resulting in the electronic structure of the atom. The periodic table may also be divided into several numbered rectangular 'blocks'. The elements belonging to a given block have this common feature: their highest-energy electrons all belong to the same -state (but the associated with that -state depends upon the period). For instance, the leftmost two columns constitute the 's-block'. The outermost electrons of Li and Be respectively belong to the 2s subshell, and those of Na and Mg to the 3s subshell. The following is the order for filling the "subshell" orbitals, which also gives the order of the "blocks" in the periodic table: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p The "periodic" nature of the filling of orbitals, as well as emergence of the s, p, d, and f "blocks", is more obvious if this order of filling is given in matrix form, with increasing principal quantum numbers starting the new rows ("periods") in the matrix. Then, each subshell (composed of the first two quantum numbers) is repeated as many times as required for each pair of electrons it may contain. The result is a compressed periodic table, with each entry representing two successive elements: Although this is the general order of orbital filling according to the Madelung rule, there are exceptions, and the actual electronic energies of each element are also dependent upon additional details of the atoms (see ). The number of electrons in an electrically neutral atom increases with the atomic number. The electrons in the outermost shell, or valence electrons, tend to be responsible for an element's chemical behavior. Elements that contain the same number of valence electrons can be grouped together and display similar chemical properties. Relativistic effects For elements with high atomic number , the effects of relativity become more pronounced, and especially so for s electrons, which move at relativistic velocities as they penetrate the screening electrons near the core of high- atoms. This relativistic increase in momentum for high speed electrons causes a corresponding decrease in wavelength and contraction of 6s orbitals relative to 5d orbitals (by comparison to corresponding s and d electrons in lighter elements in the same column of the periodic table); this results in 6s valence electrons becoming lowered in energy. Examples of significant physical outcomes of this effect include the lowered melting temperature of mercury (which results from 6s electrons not being available for metal bonding) and the golden color of gold and caesium. In the Bohr model, an  electron has a velocity given by , where is the atomic number, is the fine-structure constant, and is the speed of light. In non-relativistic quantum mechanics, therefore, any atom with an atomic number greater than 137 would require its 1s electrons to be traveling faster than the speed of light. Even in the Dirac equation, which accounts for relativistic effects, the wave function of the electron for atoms with is oscillatory and unbounded. The significance of element 137, also known as untriseptium, was first pointed out by the physicist Richard Feynman. Element 137 is sometimes informally called feynmanium (symbol Fy). However, Feynman's approximation fails to predict the exact critical value of  due to the non-point-charge nature of the nucleus and very small orbital radius of inner electrons, resulting in a potential seen by inner electrons which is effectively less than . The critical  value, which makes the atom unstable with regard to high-field breakdown of the vacuum and production of electron-positron pairs, does not occur until is about 173. These conditions are not seen except transiently in collisions of very heavy nuclei such as lead or uranium in accelerators, where such electron-positron production from these effects has been claimed to be observed. There are no nodes in relativistic orbital densities, although individual components of the wave function will have nodes. pp hybridization (conjectured) In late period 8 elements, a hybrid of 8p3/2 and 9p1/2 is expected to exist, where "3/2" and "1/2" refer to the total angular momentum quantum number. This "pp" hybrid may be responsible for the p-block of the period due to properties similar to p subshells in ordinary valence shells. Energy levels of 8p3/2 and 9p1/2 come close due to relativistic spin–orbit effects; the 9s subshell should also participate, as these elements are expected to be analogous to the respective 5p elements indium through xenon. Transitions between orbitals Bound quantum states have discrete energy levels. When applied to atomic orbitals, this means that the energy differences between states are also discrete. A transition between these states (i.e., an electron absorbing or emitting a photon) can thus happen only if the photon has an energy corresponding with the exact energy difference between said states. Consider two states of the hydrogen atom: State , , and State , , and By quantum theory, state 1 has a fixed energy of , and state 2 has a fixed energy of . Now, what would happen if an electron in state 1 were to move to state 2? For this to happen, the electron would need to gain an energy of exactly . If the electron receives energy that is less than or greater than this value, it cannot jump from state 1 to state 2. Now, suppose we irradiate the atom with a broad-spectrum of light. Photons that reach the atom that have an energy of exactly will be absorbed by the electron in state 1, and that electron will jump to state 2. However, photons that are greater or lower in energy cannot be absorbed by the electron, because the electron can jump only to one of the orbitals, it cannot jump to a state between orbitals. The result is that only photons of a specific frequency will be absorbed by the atom. This creates a line in the spectrum, known as an absorption line, which corresponds to the energy difference between states 1 and 2. The atomic orbital model thus predicts line spectra, which are observed experimentally. This is one of the main validations of the atomic orbital model. The atomic orbital model is nevertheless an approximation to the full quantum theory, which only recognizes many electron states. The predictions of line spectra are qualitatively useful but are not quantitatively accurate for atoms and ions other than those containing only one electron. See also Atomic electron configuration table Wiswesser's rule Condensed matter physics Electron configuration Energy level Hund's rules Molecular orbital Quantum chemistry Quantum chemistry computer programs Solid-state physics Wave function collapse References External links 3D representation of hydrogenic orbitals The Orbitron, a visualization of all common and uncommon atomic orbitals, from 1s to 7g Grand table Still images of many orbitals Atomic physics Chemical bonding Electron states Quantum chemistry Articles containing video clips

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https://en.wikipedia.org/wiki/Amino%20acid

Amino acid

Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. Only these 22 appear in the genetic code of all life. Amino acids can be classified according to the locations of the core structural functional groups, as alpha- (α-), beta- (β-), gamma- (γ-) or delta- (δ-) amino acids; other categories relate to polarity, ionization, and side chain group type (aliphatic, acyclic, aromatic, containing hydroxyl or sulfur, etc.). In the form of proteins, amino acid residues form the second-largest component (water being the largest) of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis. It is thought that they played a key role in enabling life on Earth and its emergence. Amino acids are formally named by the IUPAC-IUBMB Joint Commission on Biochemical Nomenclature in terms of the fictitious "neutral" structure shown in the illustration. For example, the systematic name of alanine is 2-aminopropanoic acid, based on the formula . The Commission justified this approach as follows: The systematic names and formulas given refer to hypothetical forms in which amino groups are unprotonated and carboxyl groups are undissociated. This convention is useful to avoid various nomenclatural problems but should not be taken to imply that these structures represent an appreciable fraction of the amino-acid molecules. History The first few amino acids were discovered in the early 1800s. In 1806, French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound from asparagus that was subsequently named asparagine, the first amino acid to be discovered. Cystine was discovered in 1810, although its monomer, cysteine, remained undiscovered until 1884. Glycine and leucine were discovered in 1820. The last of the 20 common amino acids to be discovered was threonine in 1935 by William Cumming Rose, who also determined the essential amino acids and established the minimum daily requirements of all amino acids for optimal growth. The unity of the chemical category was recognized by Wurtz in 1865, but he gave no particular name to it. The first use of the term "amino acid" in the English language dates from 1898, while the German term, , was used earlier. Proteins were found to yield amino acids after enzymatic digestion or acid hydrolysis. In 1902, Emil Fischer and Franz Hofmeister independently proposed that proteins are formed from many amino acids, whereby bonds are formed between the amino group of one amino acid with the carboxyl group of another, resulting in a linear structure that Fischer termed "peptide". General structure Amino acids are known as 2-, alpha-, or α-amino acids.. They have the generic formula in most cases, where R is an organic substituent known as a "side chain". Of the many hundreds of amino acids, 22 are proteinogenic ("protein-building"). It is these 22 compounds that combine to give a vast array of peptides and proteins. Chirality The carbon atom next to the carboxyl group is called the α–carbon. It bears the amine and, except in the case of glycine, the R group or side chain specific to each amino acid. With four distinct substituents, the α–carbon is stereogenic (gives rise to chirality) in all amino acids except glycine. All proteogenic amino acids have the L configuration. They are "left-handed" enantiomers, which refers to the stereoisomers of the alpha carbon. A few D-amino acids ("right-handed") have been found in nature, e.g., in bacterial envelopes, as a neuromodulator (D-serine), and in some antibiotics. Rarely, D-amino acid residues are found in proteins, and are converted from the -amino acid as a post-translational modification. Side chains Charged side chains Five amino acids possess a charge at neutral pH. Often these side chains appear at the surfaces on proteins to enable their solubility in water, and side chains with opposite charges form important electrostatic contacts called salt bridges that maintain structures within a single protein or between interfacing proteins. Many proteins bind metal into their structures specifically, and these interactions are commonly mediated by charged side chains such as aspartate, glutamate and histidine. The two negatively charged amino acids at neutral pH are aspartate (Asp, D) and glutamate (Glu, E). The anionic carboxylate groups behave as Brønsted bases in most circumstances. Enzymes in very low pH environments, like the aspartic protease pepsin in mammalian stomachs, may have catalytic aspartate or glutamate residues that act as Brønsted acids. There are three amino acids with side chains that are cations at neutral pH: arginine (Arg, R), lysine (Lys, K) and histidine (His, H). Arginine has a charged guanidino group and lysine a charged alkyl amino group, and are fully protonated at pH 7. Histidine's imidazole group has a pKa of 6.0, and is only around 10 % protonated at neutral pH. Because histidine is easily found in its basic and conjugate acid forms it often participates in catalytic proton transfers in enzyme reactions. Polar uncharged side chains The polar, uncharged amino acids serine (Ser, S), threonine (Thr, T), asparagine (Asn, N) and glutamine (Gln, Q) readily form hydrogen bonds with water and other amino acids. They do not ionize in normal conditions, a prominent exception being the catalytic serine in serine proteases. This is an example of severe perturbation, and is not characteristic of serine residues in general. Threonine has two chiral centers, not only the L (2S) chiral center at the α-carbon shared by all amino acids apart from achiral glycine, but also (3R) at the β-carbon. The full stereochemical specification is (2S,3R)-L-threonine. Hydrophobic side chains Nonpolar amino acid interactions are the primary driving force behind the processes that fold proteins into their functional three dimensional structures. None of these amino acids' side chains ionize easily, and therefore do not have pKas, with the exception of tyrosine (Tyr, Y). The hydroxyl of tyrosine can deprotonate at high pH forming the negatively charged phenolate. Because of this one could place tyrosine into the polar, uncharged amino acid category, but its very low solubility in water matches the characteristics of hydrophobic amino acids well. Special case side chains Several side chains are not described well by the charged, polar and hydrophobic categories. Glycine (Gly, G) could be considered a polar amino acid since its small size means that its solubility is largely determined by the amino and carboxylate groups. However, the lack of any side chain provides glycine with a unique flexibility among amino acids with large ramifications to protein folding. Cysteine (Cys, C) can also form hydrogen bonds readily, which would place it in the polar amino acid category, though it can often be found in protein structures forming covalent bonds, called disulphide bonds, with other cysteines. These bonds influence the folding and stability of proteins, and are essential in the formation of antibodies. Proline (Pro, P) has an alkyl side chain and could be considered hydrophobic, but because the side chain joins back onto the alpha amino group it becomes particularly inflexible when incorporated into proteins. Similar to glycine this influences protein structure in a way unique among amino acids. Selenocysteine (Sec, U) is a rare amino acid not directly encoded by DNA, but is incorporated into proteins via the ribosome. Selenocysteine has a lower redox potential compared to the similar cysteine, and participates in several unique enzymatic reactions. Pyrrolysine (Pyl, O) is another amino acid not encoded in DNA, but synthesized into protein by ribosomes. It is found in archaeal species where it participates in the catalytic activity of several methyltransferases. β- and γ-amino acids Amino acids with the structure , such as β-alanine, a component of carnosine and a few other peptides, are β-amino acids. Ones with the structure are γ-amino acids, and so on, where X and Y are two substituents (one of which is normally H). Zwitterions The common natural forms of amino acids have a zwitterionic structure, with ( in the case of proline) and functional groups attached to the same C atom, and are thus α-amino acids. and are the only ones found in proteins during translation in the ribosome. In aqueous solution at pH close to neutrality, amino acids exist as zwitterions, i.e. as dipolar ions with both and in charged states, so the overall structure is . At physiological pH the so-called "neutral forms" are not present to any measurable degree. Although the two charges in the zwitterion structure add up to zero it is misleading to call a species with a net charge of zero "uncharged". In strongly acidic conditions (pH below 3), the carboxylate group becomes protonated and the structure becomes an ammonio carboxylic acid, . This is relevant for enzymes like pepsin that are active in acidic environments such as the mammalian stomach and lysosomes, but does not significantly apply to intracellular enzymes. In highly basic conditions (pH greater than 10, not normally seen in physiological conditions), the ammonio group is deprotonated to give . Although various definitions of acids and bases are used in chemistry, the only one that is useful for chemistry in aqueous solution is that of Brønsted: an acid is a species that can donate a proton to another species, and a base is one that can accept a proton. This criterion is used to label the groups in the above illustration. The carboxylate side chains of aspartate and glutamate residues are the principal Brønsted bases in proteins. Likewise, lysine, tyrosine and cysteine will typically act as a Brønsted acid. Histidine under these conditions can act both as a Brønsted acid and a base. Isoelectric point For amino acids with uncharged side-chains the zwitterion predominates at pH values between the two pKa values, but coexists in equilibrium with small amounts of net negative and net positive ions. At the midpoint between the two pKa values, the trace amount of net negative and trace of net positive ions balance, so that average net charge of all forms present is zero. This pH is known as the isoelectric point pI, so pI = (pKa1 + pKa2). For amino acids with charged side chains, the pKa of the side chain is involved. Thus for aspartate or glutamate with negative side chains, the terminal amino group is essentially entirely in the charged form , but this positive charge needs to be balanced by the state with just one C-terminal carboxylate group is negatively charged. This occurs halfway between the two carboxylate pKa values: pI = (pKa1 + pKa(R)), where pKa(R) is the side chain pKa. Similar considerations apply to other amino acids with ionizable side-chains, including not only glutamate (similar to aspartate), but also cysteine, histidine, lysine, tyrosine and arginine with positive side chains. Amino acids have zero mobility in electrophoresis at their isoelectric point, although this behaviour is more usually exploited for peptides and proteins than single amino acids. Zwitterions have minimum solubility at their isoelectric point, and some amino acids (in particular, with nonpolar side chains) can be isolated by precipitation from water by adjusting the pH to the required isoelectric point. Physicochemical properties The 20 canonical amino acids can be classified according to their properties. Important factors are charge, hydrophilicity or hydrophobicity, size, and functional groups. These properties influence protein structure and protein–protein interactions. The water-soluble proteins tend to have their hydrophobic residues (Leu, Ile, Val, Phe, and Trp) buried in the middle of the protein, whereas hydrophilic side chains are exposed to the aqueous solvent. (In biochemistry, a residue refers to a specific monomer within the polymeric chain of a polysaccharide, protein or nucleic acid.) The integral membrane proteins tend to have outer rings of exposed hydrophobic amino acids that anchor them in the lipid bilayer. Some peripheral membrane proteins have a patch of hydrophobic amino acids on their surface that sticks to the membrane. In a similar fashion, proteins that have to bind to positively charged molecules have surfaces rich in negatively charged amino acids such as glutamate and aspartate, while proteins binding to negatively charged molecules have surfaces rich in positively charged amino acids like lysine and arginine. For example, lysine and arginine are present in large amounts in the low-complexity regions of nucleic-acid binding proteins. There are various hydrophobicity scales of amino acid residues. Some amino acids have special properties. Cysteine can form covalent disulfide bonds to other cysteine residues. Proline forms a cycle to the polypeptide backbone, and glycine is more flexible than other amino acids. Glycine and proline are strongly present within low complexity regions of both eukaryotic and prokaryotic proteins, whereas the opposite is the case with cysteine, phenylalanine, tryptophan, methionine, valine, leucine, isoleucine, which are highly reactive, or complex, or hydrophobic. Many proteins undergo a range of posttranslational modifications, whereby additional chemical groups are attached to the amino acid residue side chains sometimes producing lipoproteins (that are hydrophobic), or glycoproteins (that are hydrophilic) allowing the protein to attach temporarily to a membrane. For example, a signaling protein can attach and then detach from a cell membrane, because it contains cysteine residues that can have the fatty acid palmitic acid added to them and subsequently removed. Table of standard amino acid abbreviations and properties Although one-letter symbols are included in the table, IUPAC–IUBMB recommend that "Use of the one-letter symbols should be restricted to the comparison of long sequences". Two additional amino acids are in some species coded for by codons that are usually interpreted as stop codons: In addition to the specific amino acid codes, placeholders are used in cases where chemical or crystallographic analysis of a peptide or protein cannot conclusively determine the identity of a residue. They are also used to summarise conserved protein sequence motifs. The use of single letters to indicate sets of similar residues is similar to the use of abbreviation codes for degenerate bases. Unk is sometimes used instead of Xaa, but is less standard. Ter or * (from termination) is used in notation for mutations in proteins when a stop codon occurs. It corresponds to no amino acid at all. In addition, many nonstandard amino acids have a specific code. For example, several peptide drugs, such as Bortezomib and MG132, are artificially synthesized and retain their protecting groups, which have specific codes. Bortezomib is Pyz–Phe–boroLeu, and MG132 is Z–Leu–Leu–Leu–al. To aid in the analysis of protein structure, photo-reactive amino acid analogs are available. These include photoleucine (pLeu) and photomethionine (pMet). Occurrence and functions in biochemistry Proteinogenic amino acids Amino acids are the precursors to proteins. They join by condensation reactions to form short polymer chains called peptides or longer chains called either polypeptides or proteins. These chains are linear and unbranched, with each amino acid residue within the chain attached to two neighboring amino acids. In Nature, the process of making proteins encoded by DNA/RNA genetic material is called translation and involves the step-by-step addition of amino acids to a growing protein chain by a ribozyme that is called a ribosome. The order in which the amino acids are added is read through the genetic code from an mRNA template, which is an RNA copy of one of the organism's genes. Twenty-two amino acids are naturally incorporated into polypeptides and are called proteinogenic or natural amino acids. Of these, 20 are encoded by the universal genetic code. The remaining 2, selenocysteine and pyrrolysine, are incorporated into proteins by unique synthetic mechanisms. Selenocysteine is incorporated when the mRNA being translated includes a SECIS element, which causes the UGA codon to encode selenocysteine instead of a stop codon. Pyrrolysine is used by some methanogenic archaea in enzymes that they use to produce methane. It is coded for with the codon UAG, which is normally a stop codon in other organisms. This UAG codon is followed by a PYLIS downstream sequence. Several independent evolutionary studies have suggested that Gly, Ala, Asp, Val, Ser, Pro, Glu, Leu, Thr may belong to a group of amino acids that constituted the early genetic code, whereas Cys, Met, Tyr, Trp, His, Phe may belong to a group of amino acids that constituted later additions of the genetic code. Standard vs nonstandard amino acids The 20 amino acids that are encoded directly by the codons of the universal genetic code are called standard or canonical amino acids. A modified form of methionine (N-formylmethionine) is often incorporated in place of methionine as the initial amino acid of proteins in bacteria, mitochondria and chloroplasts. Other amino acids are called nonstandard or non-canonical. Most of the nonstandard amino acids are also non-proteinogenic (i.e. they cannot be incorporated into proteins during translation), but two of them are proteinogenic, as they can be incorporated translationally into proteins by exploiting information not encoded in the universal genetic code. The two nonstandard proteinogenic amino acids are selenocysteine (present in many non-eukaryotes as well as most eukaryotes, but not coded directly by DNA) and pyrrolysine (found only in some archaea and at least one bacterium). The incorporation of these nonstandard amino acids is rare. For example, 25 human proteins include selenocysteine in their primary structure, and the structurally characterized enzymes (selenoenzymes) employ selenocysteine as the catalytic moiety in their active sites. Pyrrolysine and selenocysteine are encoded via variant codons. For example, selenocysteine is encoded by stop codon and SECIS element. N-formylmethionine (which is often the initial amino acid of proteins in bacteria, mitochondria, and chloroplasts) is generally considered as a form of methionine rather than as a separate proteinogenic amino acid. Codon–tRNA combinations not found in nature can also be used to "expand" the genetic code and form novel proteins known as alloproteins incorporating non-proteinogenic amino acids. Non-proteinogenic amino acids Aside from the 22 proteinogenic amino acids, many non-proteinogenic amino acids are known. Those either are not found in proteins (for example carnitine, GABA, levothyroxine) or are not produced directly and in isolation by standard cellular machinery. For example, hydroxyproline , is synthesised from proline. Another example is selenomethionine). Non-proteinogenic amino acids that are found in proteins are formed by post-translational modification. Such modifications can also determine the localization of the protein, e.g., the addition of long hydrophobic groups can cause a protein to bind to a phospholipid membrane.Examples: the carboxylation of glutamate allows for better binding of calcium cations, Hydroxyproline, generated by hydroxylation of proline, is a major component of the connective tissue collagen. Hypusine in the translation initiation factor EIF5A, contains a modification of lysine. Some non-proteinogenic amino acids are not found in proteins. Examples include 2-aminoisobutyric acid and the neurotransmitter gamma-aminobutyric acid. Non-proteinogenic amino acids often occur as intermediates in the metabolic pathways for standard amino acids – for example, ornithine and citrulline occur in the urea cycle, part of amino acid catabolism (see below). A rare exception to the dominance of α-amino acids in biology is the β-amino acid beta alanine (3-aminopropanoic acid), which is used in plants and microorganisms in the synthesis of pantothenic acid (vitamin B5), a component of coenzyme A. In mammalian nutrition Amino acids are not typical component of food: animals eat proteins. The protein is broken down into amino acids in the process of digestion. They are then used to synthesize new proteins, other biomolecules, or are oxidized to urea and carbon dioxide as a source of energy. The oxidation pathway starts with the removal of the amino group by a transaminase; the amino group is then fed into the urea cycle. The other product of transamidation is a keto acid that enters the citric acid cycle. Glucogenic amino acids can also be converted into glucose, through gluconeogenesis. Of the 20 standard amino acids, nine (His, Ile, Leu, Lys, Met, Phe, Thr, Trp and Val) are called essential amino acids because the human body cannot synthesize them from other compounds at the level needed for normal growth, so they must be obtained from food. Semi-essential and conditionally essential amino acids, and juvenile requirements In addition, cysteine, tyrosine, and arginine are considered semiessential amino acids, and taurine a semi-essential aminosulfonic acid in children. Some amino acids are conditionally essential for certain ages or medical conditions. Essential amino acids may also vary from species to species. The metabolic pathways that synthesize these monomers are not fully developed. Non-protein functions Many proteinogenic and non-proteinogenic amino acids have biological functions beyond being precursors to proteins and peptides.In humans, amino acids also have important roles in diverse biosynthetic pathways. Defenses against herbivores in plants sometimes employ amino acids. Examples: Standard amino acids Tryptophan is a precursor of the neurotransmitter serotonin. Tyrosine (and its precursor phenylalanine) are precursors of the catecholamine neurotransmitters dopamine, epinephrine and norepinephrine and various trace amines. Phenylalanine is a precursor of phenethylamine and tyrosine in humans. In plants, it is a precursor of various phenylpropanoids, which are important in plant metabolism. Glycine is a precursor of porphyrins such as heme. Arginine is a precursor of nitric oxide. Ornithine and S-adenosylmethionine are precursors of polyamines. Aspartate, glycine, and glutamine are precursors of nucleotides. However, not all of the functions of other abundant nonstandard amino acids are known. Roles for nonstandard amino acids Carnitine is used in lipid transport. gamma-aminobutyric acid is a neurotransmitter. 5-HTP (5-hydroxytryptophan) is used for experimental treatment of depression. L-DOPA (L-dihydroxyphenylalanine) for Parkinson's treatment, Eflornithine inhibits ornithine decarboxylase and used in the treatment of sleeping sickness. Canavanine, an analogue of arginine found in many legumes is an antifeedant, protecting the plant from predators. Mimosine found in some legumes, is another possible antifeedant. This compound is an analogue of tyrosine and can poison animals that graze on these plants. Uses in industry Animal feed Amino acids are sometimes added to animal feed because some of the components of these feeds, such as soybeans, have low levels of some of the essential amino acids, especially of lysine, methionine, threonine, and tryptophan. Likewise amino acids are used to chelate metal cations in order to improve the absorption of minerals from feed supplements. Food The food industry is a major consumer of amino acids, especially glutamic acid, which is used as a flavor enhancer, and aspartame (aspartylphenylalanine 1-methyl ester), which is used as an artificial sweetener. Amino acids are sometimes added to food by manufacturers to alleviate symptoms of mineral deficiencies, such as anemia, by improving mineral absorption and reducing negative side effects from inorganic mineral supplementation. Chemical building blocks Amino acids are low-cost feedstocks used in chiral pool synthesis as enantiomerically pure building blocks. Amino acids are used in the synthesis of some cosmetics. Aspirational uses Fertilizer The chelating ability of amino acids is sometimes used in fertilizers to facilitate the delivery of minerals to plants in order to correct mineral deficiencies, such as iron chlorosis. These fertilizers are also used to prevent deficiencies from occurring and to improve the overall health of the plants. Biodegradable plastics Amino acids have been considered as components of biodegradable polymers, which have applications as environmentally friendly packaging and in medicine in drug delivery and the construction of prosthetic implants. An interesting example of such materials is polyaspartate, a water-soluble biodegradable polymer that may have applications in disposable diapers and agriculture. Due to its solubility and ability to chelate metal ions, polyaspartate is also being used as a biodegradable antiscaling agent and a corrosion inhibitor. Synthesis Chemical synthesis The commercial production of amino acids usually relies on mutant bacteria that overproduce individual amino acids using glucose as a carbon source. Some amino acids are produced by enzymatic conversions of synthetic intermediates. 2-Aminothiazoline-4-carboxylic acid is an intermediate in one industrial synthesis of L-cysteine for example. Aspartic acid is produced by the addition of ammonia to fumarate using a lyase. Biosynthesis In plants, nitrogen is first assimilated into organic compounds in the form of glutamate, formed from alpha-ketoglutarate and ammonia in the mitochondrion. For other amino acids, plants use transaminases to move the amino group from glutamate to another alpha-keto acid. For example, aspartate aminotransferase converts glutamate and oxaloacetate to alpha-ketoglutarate and aspartate. Other organisms use transaminases for amino acid synthesis, too. Nonstandard amino acids are usually formed through modifications to standard amino acids. For example, homocysteine is formed through the transsulfuration pathway or by the demethylation of methionine via the intermediate metabolite S-adenosylmethionine, while hydroxyproline is made by a post translational modification of proline. Microorganisms and plants synthesize many uncommon amino acids. For example, some microbes make 2-aminoisobutyric acid and lanthionine, which is a sulfide-bridged derivative of alanine. Both of these amino acids are found in peptidic lantibiotics such as alamethicin. However, in plants, 1-aminocyclopropane-1-carboxylic acid is a small disubstituted cyclic amino acid that is an intermediate in the production of the plant hormone ethylene. Primordial synthesis The formation of amino acids and peptides are assumed to precede and perhaps induce the emergence of life on earth. Amino acids can form from simple precursors under various conditions. Surface-based chemical metabolism of amino acids and very small compounds may have led to the build-up of amino acids, coenzymes and phosphate-based small carbon molecules. Amino acids and similar building blocks could have been elaborated into proto-peptides, with peptides being considered key players in the origin of life. In the famous Urey-Miller experiment, the passage of an electric arc through a mixture of methane, hydrogen, and ammonia produces a large number of amino acids. Since then, scientists have discovered a range of ways and components by which the potentially prebiotic formation and chemical evolution of peptides may have occurred, such as condensing agents, the design of self-replicating peptides and a number of non-enzymatic mechanisms by which amino acids could have emerged and elaborated into peptides. Several hypotheses invoke the Strecker synthesis whereby hydrogen cyanide, simple aldehydes, ammonia, and water produce amino acids. According to a review, amino acids, and even peptides, "turn up fairly regularly in the various experimental broths that have been allowed to be cooked from simple chemicals. This is because nucleotides are far more difficult to synthesize chemically than amino acids." For a chronological order, it suggests that there must have been a 'protein world' or at least a 'polypeptide world', possibly later followed by the 'RNA world' and the 'DNA world'. Codon–amino acids mappings may be the biological information system at the primordial origin of life on Earth. While amino acids and consequently simple peptides must have formed under different experimentally probed geochemical scenarios, the transition from an abiotic world to the first life forms is to a large extent still unresolved. Reactions Amino acids undergo the reactions expected of the constituent functional groups. Peptide bond formation As both the amine and carboxylic acid groups of amino acids can react to form amide bonds, one amino acid molecule can react with another and become joined through an amide linkage. This polymerization of amino acids is what creates proteins. This condensation reaction yields the newly formed peptide bond and a molecule of water. In cells, this reaction does not occur directly; instead, the amino acid is first activated by attachment to a transfer RNA molecule through an ester bond. This aminoacyl-tRNA is produced in an ATP-dependent reaction carried out by an aminoacyl tRNA synthetase. This aminoacyl-tRNA is then a substrate for the ribosome, which catalyzes the attack of the amino group of the elongating protein chain on the ester bond. As a result of this mechanism, all proteins made by ribosomes are synthesized starting at their N-terminus and moving toward their C-terminus. However, not all peptide bonds are formed in this way. In a few cases, peptides are synthesized by specific enzymes. For example, the tripeptide glutathione is an essential part of the defenses of cells against oxidative stress. This peptide is synthesized in two steps from free amino acids. In the first step, gamma-glutamylcysteine synthetase condenses cysteine and glutamate through a peptide bond formed between the side chain carboxyl of the glutamate (the gamma carbon of this side chain) and the amino group of the cysteine. This dipeptide is then condensed with glycine by glutathione synthetase to form glutathione. In chemistry, peptides are synthesized by a variety of reactions. One of the most-used in solid-phase peptide synthesis uses the aromatic oxime derivatives of amino acids as activated units. These are added in sequence onto the growing peptide chain, which is attached to a solid resin support. Libraries of peptides are used in drug discovery through high-throughput screening. The combination of functional groups allow amino acids to be effective polydentate ligands for metal–amino acid chelates. The multiple side chains of amino acids can also undergo chemical reactions. Catabolism Degradation of an amino acid often involves deamination by moving its amino group to alpha-ketoglutarate, forming glutamate. This process involves transaminases, often the same as those used in amination during synthesis. In many vertebrates, the amino group is then removed through the urea cycle and is excreted in the form of urea. However, amino acid degradation can produce uric acid or ammonia instead. For example, serine dehydratase converts serine to pyruvate and ammonia. After removal of one or more amino groups, the remainder of the molecule can sometimes be used to synthesize new amino acids, or it can be used for energy by entering glycolysis or the citric acid cycle, as detailed in image at right. Complexation Amino acids are bidentate ligands, forming transition metal amino acid complexes. Chemical analysis The total nitrogen content of organic matter is mainly formed by the amino groups in proteins. The Total Kjeldahl Nitrogen (TKN) is a measure of nitrogen widely used in the analysis of (waste) water, soil, food, feed and organic matter in general. As the name suggests, the Kjeldahl method is applied. More sensitive methods are available. See also Amino acid dating Beta-peptide Degron Erepsin Homochirality Hyperaminoacidemia Leucines Miller–Urey experiment Nucleic acid sequence RNA codon table Notes References Further reading External links Nitrogen cycle Zwitterions

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https://en.wikipedia.org/wiki/Alan%20Turing

Alan Turing

Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purpose computer. He is widely considered to be the father of theoretical computer science and artificial intelligence. Born in Maida Vale, London, Turing was raised in southern England. He graduated at King's College, Cambridge, with a degree in mathematics. Whilst he was a fellow at Cambridge, he published a proof demonstrating that some purely mathematical yes–no questions can never be answered by computation. He defined a Turing machine and proved that the halting problem for Turing machines is undecidable. In 1938, he obtained his PhD from the Department of Mathematics at Princeton University. During the Second World War, Turing worked for the Government Code and Cypher School at Bletchley Park, Britain's codebreaking centre that produced Ultra intelligence. For a time he led Hut 8, the section that was responsible for German naval cryptanalysis. Here, he devised a number of techniques for speeding the breaking of German ciphers, including improvements to the pre-war Polish bomba method, an electromechanical machine that could find settings for the Enigma machine. Turing played a crucial role in cracking intercepted coded messages that enabled the Allies to defeat the Axis powers in many crucial engagements, including the Battle of the Atlantic. After the war, Turing worked at the National Physical Laboratory, where he designed the Automatic Computing Engine, one of the first designs for a stored-program computer. In 1948, Turing joined Max Newman's Computing Machine Laboratory at the Victoria University of Manchester, where he helped develop the Manchester computers and became interested in mathematical biology. He wrote a paper on the chemical basis of morphogenesis and predicted oscillating chemical reactions such as the Belousov–Zhabotinsky reaction, first observed in the 1960s. Despite these accomplishments, Turing was never fully recognised in Britain during his lifetime because much of his work was covered by the Official Secrets Act. Turing was prosecuted in 1952 for homosexual acts. He accepted hormone treatment with DES, a procedure commonly referred to as chemical castration, as an alternative to prison. Turing died on 7 June 1954, 16 days before his 42nd birthday, from cyanide poisoning. An inquest determined his death as a suicide, but it has been noted that the known evidence is also consistent with accidental poisoning. Following a public campaign in 2009, British prime minister Gordon Brown made an official public apology on behalf of the government for "the appalling way [Turing] was treated". Queen Elizabeth II granted a posthumous pardon in 2013. The term "Alan Turing law" is now used informally to refer to a 2017 law in the United Kingdom that retroactively pardoned men cautioned or convicted under historical legislation that outlawed homosexual acts. Turing has an extensive legacy with statues of him and many things named after him, including an annual award for computer science innovations. He appears on the current Bank of England £50 note, which was released on 23 June 2021 to coincide with his birthday. A 2019 BBC series, as voted by the audience, named him the greatest person of the 20th century. Early life and education Family Turing was born in Maida Vale, London, while his father, Julius Mathison Turing was on leave from his position with the Indian Civil Service (ICS) of the British Raj government at Chatrapur, then in the Madras Presidency and presently in Odisha state, in India. Turing's father was the son of a clergyman, the Rev. John Robert Turing, from a Scottish family of merchants that had been based in the Netherlands and included a baronet. Turing's mother, Julius's wife, was Ethel Sara Turing (), daughter of Edward Waller Stoney, chief engineer of the Madras Railways. The Stoneys were a Protestant Anglo-Irish gentry family from both County Tipperary and County Longford, while Ethel herself had spent much of her childhood in County Clare. Julius and Ethel married on 1 October 1907 at Bartholomew's church on Clyde Road, in Dublin. Julius's work with the ICS brought the family to British India, where his grandfather had been a general in the Bengal Army. However, both Julius and Ethel wanted their children to be brought up in Britain, so they moved to Maida Vale, London, where Alan Turing was born on 23 June 1912, as recorded by a blue plaque on the outside of the house of his birth, later the Colonnade Hotel. Turing had an elder brother, John Ferrier Turing, father of Sir John Dermot Turing, 12th Baronet of the Turing baronets. Turing's father's civil service commission was still active during Turing's childhood years, and his parents travelled between Hastings in the United Kingdom and India, leaving their two sons to stay with a retired Army couple. At Hastings, Turing stayed at Baston Lodge, Upper Maze Hill, St Leonards-on-Sea, now marked with a blue plaque. The plaque was unveiled on 23 June 2012, the centenary of Turing's birth. Very early in life, Turing showed signs of the genius that he was later to display prominently. His parents purchased a house in Guildford in 1927, and Turing lived there during school holidays. The location is also marked with a blue plaque. School Turing's parents enrolled him at St Michael's, a primary school at 20 Charles Road, St Leonards-on-Sea, from the age of six to nine. The headmistress recognised his talent, noting that she has "...had clever boys and hardworking boys, but Alan is a genius". Between January 1922 and 1926, Turing was educated at Hazelhurst Preparatory School, an independent school in the village of Frant in Sussex (now East Sussex). In 1926, at the age of 13, he went on to Sherborne School, an independent boarding school in the market town of Sherborne in Dorset, where he boarded at Westcott House. The first day of term coincided with the 1926 General Strike, in Britain, but Turing was so determined to attend that he rode his bicycle unaccompanied from Southampton to Sherborne, stopping overnight at an inn. Turing's natural inclination towards mathematics and science did not earn him respect from some of the teachers at Sherborne, whose definition of education placed more emphasis on the classics. His headmaster wrote to his parents: "I hope he will not fall between two stools. If he is to stay at public school, he must aim at becoming educated. If he is to be solely a Scientific Specialist, he is wasting his time at a public school". Despite this, Turing continued to show remarkable ability in the studies he loved, solving advanced problems in 1927 without having studied even elementary calculus. In 1928, aged 16, Turing encountered Albert Einstein's work; not only did he grasp it, but it is possible that he managed to deduce Einstein's questioning of Newton's laws of motion from a text in which this was never made explicit. Christopher Morcom At Sherborne, Turing formed a significant friendship with fellow pupil Christopher Collan Morcom (13 July 1911 – 13 February 1930), who has been described as Turing's first love. Their relationship provided inspiration in Turing's future endeavours, but it was cut short by Morcom's death, in February 1930, from complications of bovine tuberculosis, contracted after drinking infected cow's milk some years previously. The event caused Turing great sorrow. He coped with his grief by working that much harder on the topics of science and mathematics that he had shared with Morcom. In a letter to Morcom's mother, Frances Isobel Morcom (née Swan), Turing wrote: Turing's relationship with Morcom's mother continued long after Morcom's death, with her sending gifts to Turing, and him sending letters, typically on Morcom's birthday. A day before the third anniversary of Morcom's death (13 February 1933), he wrote to Mrs. Morcom: Some have speculated that Morcom's death was the cause of Turing's atheism and materialism. Apparently, at this point in his life he still believed in such concepts as a spirit, independent of the body and surviving death. In a later letter, also written to Morcom's mother, Turing wrote: University and work on computability After graduating from Sherborne, Turing studied the undergraduate course in Schedule B (that is, a three-year Parts I and II, of the Mathematical Tripos, with extra courses at the end of the third year, as Part III only emerged as a separate degree in 1934) from February 1931 to November 1934 at King's College, Cambridge, where he was awarded first-class honours in mathematics. His dissertation, On the Gaussian error function, written during his senior year and delivered in November 1934 (with a deadline date of 6 December) proved a version of the central limit theorem. It was finally accepted on 16 March 1935. By spring of that same year, Turing started his master's course (Part III)—which he completed in 1937—and, at the same time, he published his first paper, a one-page article called Equivalence of left and right almost periodicity (sent on 23 April), featured in the tenth volume of the Journal of the London Mathematical Society. Later that year, Turing was elected a Fellow of King's College on the strength of his dissertation. However, and, unknown to Turing, this version of the theorem he proved in his paper, had already been proven, in 1922, by Jarl Waldemar Lindeberg. Despite this, the committee found Turing's methods original and so regarded the work worthy of consideration for the fellowship. Abram Besicovitch's report for the committee went so far as to say that if Turing's work had been published before Lindeberg's, it would have been "an important event in the mathematical literature of that year". Between the springs of 1935 and 1936, at the same time as Church, Turing worked on the decidability of problems, starting from Godel's incompleteness theorems. In mid-April 1936, Turing sent Max Newman the first draft typescript of his investigations. That same month, Alonzo Church published his An Unsolvable Problem of Elementary Number Theory, with similar conclusions to Turing's then-yet unpublished work. Finally, on 28 May of that year, he finished and delivered his 36-page paper for publication called "On Computable Numbers, with an Application to the Entscheidungsproblem". It was published in the Proceedings of the London Mathematical Society journal in two parts, the first on 30 November and the second on 23 December. In this paper, Turing reformulated Kurt Gödel's 1931 results on the limits of proof and computation, replacing Gödel's universal arithmetic-based formal language with the formal and simple hypothetical devices that became known as Turing machines. The Entscheidungsproblem (decision problem) was originally posed by German mathematician David Hilbert in 1928. Turing proved that his "universal computing machine" would be capable of performing any conceivable mathematical computation if it were representable as an algorithm. He went on to prove that there was no solution to the decision problem by first showing that the halting problem for Turing machines is undecidable: it is not possible to decide algorithmically whether a Turing machine will ever halt. This paper has been called "easily the most influential math paper in history". Although Turing's proof was published shortly after Alonzo Church's equivalent proof using his lambda calculus, Turing's approach is considerably more accessible and intuitive than Church's. It also included a notion of a 'Universal Machine' (now known as a universal Turing machine), with the idea that such a machine could perform the tasks of any other computation machine (as indeed could Church's lambda calculus). According to the Church–Turing thesis, Turing machines and the lambda calculus are capable of computing anything that is computable. John von Neumann acknowledged that the central concept of the modern computer was due to Turing's paper. To this day, Turing machines are a central object of study in theory of computation. From September 1936 to July 1938, Turing spent most of his time studying under Church at Princeton University, in the second year as a Jane Eliza Procter Visiting Fellow. In addition to his purely mathematical work, he studied cryptology and also built three of four stages of an electro-mechanical binary multiplier. In June 1938, he obtained his PhD from the Department of Mathematics at Princeton; his dissertation, Systems of Logic Based on Ordinals, introduced the concept of ordinal logic and the notion of relative computing, in which Turing machines are augmented with so-called oracles, allowing the study of problems that cannot be solved by Turing machines. John von Neumann wanted to hire him as his postdoctoral assistant, but he went back to the United Kingdom. Career and research When Turing returned to Cambridge, he attended lectures given in 1939 by Ludwig Wittgenstein about the foundations of mathematics. The lectures have been reconstructed verbatim, including interjections from Turing and other students, from students' notes. Turing and Wittgenstein argued and disagreed, with Turing defending formalism and Wittgenstein propounding his view that mathematics does not discover any absolute truths, but rather invents them. Cryptanalysis During the Second World War, Turing was a leading participant in the breaking of German ciphers at Bletchley Park. The historian and wartime codebreaker Asa Briggs has said, "You needed exceptional talent, you needed genius at Bletchley and Turing's was that genius." From September 1938, Turing worked part-time with the Government Code and Cypher School (GC&CS), the British codebreaking organisation. He concentrated on cryptanalysis of the Enigma cipher machine used by Nazi Germany, together with Dilly Knox, a senior GC&CS codebreaker. Soon after the July 1939 meeting near Warsaw at which the Polish Cipher Bureau gave the British and French details of the wiring of Enigma machine's rotors and their method of decrypting Enigma machine's messages, Turing and Knox developed a broader solution. The Polish method relied on an insecure indicator procedure that the Germans were likely to change, which they in fact did in May 1940. Turing's approach was more general, using crib-based decryption for which he produced the functional specification of the bombe (an improvement on the Polish Bomba). On 4 September 1939, the day after the UK declared war on Germany, Turing reported to Bletchley Park, the wartime station of GC&CS. Like all others who came to Bletchley, he was required to sign the Official Secrets Act, in which he agreed not to disclose anything about his work at Bletchley, with severe legal penalties for violating the Act. Specifying the bombe was the first of five major cryptanalytical advances that Turing made during the war. The others were: deducing the indicator procedure used by the German navy; developing a statistical procedure dubbed Banburismus for making much more efficient use of the bombes; developing a procedure dubbed Turingery for working out the cam settings of the wheels of the Lorenz SZ 40/42 (Tunny) cipher machine and, towards the end of the war, the development of a portable secure voice scrambler at Hanslope Park that was codenamed Delilah. By using statistical techniques to optimise the trial of different possibilities in the code breaking process, Turing made an innovative contribution to the subject. He wrote two papers discussing mathematical approaches, titled The Applications of Probability to Cryptography and Paper on Statistics of Repetitions, which were of such value to GC&CS and its successor GCHQ that they were not released to the UK National Archives until April 2012, shortly before the centenary of his birth. A GCHQ mathematician, "who identified himself only as Richard," said at the time that the fact that the contents had been restricted under the Official Secrets Act for some 70 years demonstrated their importance, and their relevance to post-war cryptanalysis: Turing had a reputation for eccentricity at Bletchley Park. He was known to his colleagues as "Prof" and his treatise on Enigma was known as the "Prof's Book". According to historian Ronald Lewin, Jack Good, a cryptanalyst who worked with Turing, said of his colleague: Peter Hilton recounted his experience working with Turing in Hut 8 in his "Reminiscences of Bletchley Park" from A Century of Mathematics in America: Hilton echoed similar thoughts in the Nova PBS documentary Decoding Nazi Secrets. While working at Bletchley, Turing, who was a talented long-distance runner, occasionally ran the to London when he was needed for meetings, and he was capable of world-class marathon standards. Turing tried out for the 1948 British Olympic team, but he was hampered by an injury. His tryout time for the marathon was only 11 minutes slower than British silver medallist Thomas Richards' Olympic race time of 2 hours 35 minutes. He was Walton Athletic Club's best runner, a fact discovered when he passed the group while running alone. When asked why he ran so hard in training he replied: Due to the problems of counterfactual history, it is hard to estimate the precise effect Ultra intelligence had on the war. However, official war historian Harry Hinsley estimated that this work shortened the war in Europe by more than two years and saved over 14 million lives. At the end of the war, a memo was sent to all those who had worked at Bletchley Park, reminding them that the code of silence dictated by the Official Secrets Act did not end with the war but would continue indefinitely. Thus, even though Turing was appointed an Officer of the Order of the British Empire (OBE) in 1946 by King George VI for his wartime services, his work remained secret for many years. Bombe Within weeks of arriving at Bletchley Park, Turing had specified an electromechanical machine called the bombe, which could break Enigma more effectively than the Polish bomba kryptologiczna, from which its name was derived. The bombe, with an enhancement suggested by mathematician Gordon Welchman, became one of the primary tools, and the major automated one, used to attack Enigma-enciphered messages. The bombe searched for possible correct settings used for an Enigma message (i.e., rotor order, rotor settings and plugboard settings) using a suitable crib: a fragment of probable plaintext. For each possible setting of the rotors (which had on the order of 1019 states, or 1022 states for the four-rotor U-boat variant), the bombe performed a chain of logical deductions based on the crib, implemented electromechanically. The bombe detected when a contradiction had occurred and ruled out that setting, moving on to the next. Most of the possible settings would cause contradictions and be discarded, leaving only a few to be investigated in detail. A contradiction would occur when an enciphered letter would be turned back into the same plaintext letter, which was impossible with the Enigma. The first bombe was installed on 18 March 1940. Action This Day By late 1941, Turing and his fellow cryptanalysts Gordon Welchman, Hugh Alexander and Stuart Milner-Barry were frustrated. Building on the work of the Poles, they had set up a good working system for decrypting Enigma signals, but their limited staff and bombes meant they could not translate all the signals. In the summer, they had considerable success, and shipping losses had fallen to under 100,000 tons a month; however, they badly needed more resources to keep abreast of German adjustments. They had tried to get more people and fund more bombes through the proper channels, but had failed. On 28 October they wrote directly to Winston Churchill explaining their difficulties, with Turing as the first named. They emphasised how small their need was compared with the vast expenditure of men and money by the forces and compared with the level of assistance they could offer to the forces. As Andrew Hodges, biographer of Turing, later wrote, "This letter had an electric effect." Churchill wrote a memo to General Ismay, which read: "ACTION THIS DAY. Make sure they have all they want on extreme priority and report to me that this has been done." On 18 November, the chief of the secret service reported that every possible measure was being taken. The cryptographers at Bletchley Park did not know of the Prime Minister's response, but as Milner-Barry recalled, "All that we did notice was that almost from that day the rough ways began miraculously to be made smooth." More than two hundred bombes were in operation by the end of the war. Hut 8 and the naval Enigma Turing decided to tackle the particularly difficult problem of German naval Enigma "because no one else was doing anything about it and I could have it to myself". In December 1939, Turing solved the essential part of the naval indicator system, which was more complex than the indicator systems used by the other services. That same night, he also conceived of the idea of Banburismus, a sequential statistical technique (what Abraham Wald later called sequential analysis) to assist in breaking the naval Enigma, "though I was not sure that it would work in practice, and was not, in fact, sure until some days had actually broken". For this, he invented a measure of weight of evidence that he called the ban. Banburismus could rule out certain sequences of the Enigma rotors, substantially reducing the time needed to test settings on the bombes. Later this sequential process of accumulating sufficient weight of evidence using decibans (one tenth of a ban) was used in Cryptanalysis of the Lorenz cipher. Turing travelled to the United States in November 1942 and worked with US Navy cryptanalysts on the naval Enigma and bombe construction in Washington. He also visited their Computing Machine Laboratory in Dayton, Ohio. Turing's reaction to the American bombe design was far from enthusiastic: During this trip, he also assisted at Bell Labs with the development of secure speech devices. He returned to Bletchley Park in March 1943. During his absence, Hugh Alexander had officially assumed the position of head of Hut 8, although Alexander had been de facto head for some time (Turing having little interest in the day-to-day running of the section). Turing became a general consultant for cryptanalysis at Bletchley Park. Alexander wrote of Turing's contribution: Turingery In July 1942, Turing devised a technique termed Turingery (or jokingly Turingismus) for use against the Lorenz cipher messages produced by the Germans' new Geheimschreiber (secret writer) machine. This was a teleprinter rotor cipher attachment codenamed Tunny at Bletchley Park. Turingery was a method of wheel-breaking, i.e., a procedure for working out the cam settings of Tunny's wheels. He also introduced the Tunny team to Tommy Flowers who, under the guidance of Max Newman, went on to build the Colossus computer, the world's first programmable digital electronic computer, which replaced a simpler prior machine (the Heath Robinson), and whose superior speed allowed the statistical decryption techniques to be applied usefully to the messages. Some have mistakenly said that Turing was a key figure in the design of the Colossus computer. Turingery and the statistical approach of Banburismus undoubtedly fed into the thinking about cryptanalysis of the Lorenz cipher, but he was not directly involved in the Colossus development. Delilah Following his work at Bell Labs in the US, Turing pursued the idea of electronic enciphering of speech in the telephone system. In the latter part of the war, he moved to work for the Secret Service's Radio Security Service (later HMGCC) at Hanslope Park. At the park, he further developed his knowledge of electronics with the assistance of REME officer Donald Bayley. Together they undertook the design and construction of a portable secure voice communications machine codenamed Delilah. The machine was intended for different applications, but it lacked the capability for use with long-distance radio transmissions. In any case, Delilah was completed too late to be used during the war. Though the system worked fully, with Turing demonstrating it to officials by encrypting and decrypting a recording of a Winston Churchill speech, Delilah was not adopted for use. Turing also consulted with Bell Labs on the development of SIGSALY, a secure voice system that was used in the later years of the war. Early computers and the Turing test Between 1945 and 1947, Turing lived in Hampton, London, while he worked on the design of the ACE (Automatic Computing Engine) at the National Physical Laboratory (NPL). He presented a paper on 19 February 1946, which was the first detailed design of a stored-program computer. Von Neumann's incomplete First Draft of a Report on the EDVAC had predated Turing's paper, but it was much less detailed and, according to John R. Womersley, Superintendent of the NPL Mathematics Division, it "contains a number of ideas which are Dr. Turing's own". Although ACE was a feasible design, the effect of the Official Secrets Act surrounding the wartime work at Bletchley Park made it impossible for Turing to explain the basis of his analysis of how a computer installation involving human operators would work. This led to delays in starting the project and he became disillusioned. In late 1947 he returned to Cambridge for a sabbatical year during which he produced a seminal work on Intelligent Machinery that was not published in his lifetime. While he was at Cambridge, the Pilot ACE was being built in his absence. It executed its first program on 10 May 1950, and a number of later computers around the world owe much to it, including the English Electric DEUCE and the American Bendix G-15. The full version of Turing's ACE was not built until after his death. According to the memoirs of the German computer pioneer Heinz Billing from the Max Planck Institute for Physics, published by Genscher, Düsseldorf, there was a meeting between Turing and Konrad Zuse. It took place in Göttingen in 1947. The interrogation had the form of a colloquium. Participants were Womersley, Turing, Porter from England and a few German researchers like Zuse, Walther, and Billing (for more details see Herbert Bruderer, Konrad Zuse und die Schweiz). In 1948, Turing was appointed reader in the Mathematics Department at the Victoria University of Manchester. A year later, he became deputy director of the Computing Machine Laboratory, where he worked on software for one of the earliest stored-program computers—the Manchester Mark 1. Turing wrote the first version of the Programmer's Manual for this machine, and was recruited by Ferranti as a consultant in the development of their commercialised machine, the Ferranti Mark 1. He continued to be paid consultancy fees by Ferranti until his death. During this time, he continued to do more abstract work in mathematics, and in "Computing Machinery and Intelligence" (Mind, October 1950), Turing addressed the problem of artificial intelligence, and proposed an experiment that became known as the Turing test, an attempt to define a standard for a machine to be called "intelligent". The idea was that a computer could be said to "think" if a human interrogator could not tell it apart, through conversation, from a human being. In the paper, Turing suggested that rather than building a program to simulate the adult mind, it would be better to produce a simpler one to simulate a child's mind and then to subject it to a course of education. A reversed form of the Turing test is widely used on the Internet; the CAPTCHA test is intended to determine whether the user is a human or a computer. In 1948, Turing, working with his former undergraduate colleague, D.G. Champernowne, began writing a chess program for a computer that did not yet exist. By 1950, the program was completed and dubbed the Turochamp. In 1952, he tried to implement it on a Ferranti Mark 1, but lacking enough power, the computer was unable to execute the program. Instead, Turing "ran" the program by flipping through the pages of the algorithm and carrying out its instructions on a chessboard, taking about half an hour per move. The game was recorded. According to Garry Kasparov, Turing's program "played a recognizable game of chess". The program lost to Turing's colleague Alick Glennie, although it is said that it won a game against Champernowne's wife, Isabel. His Turing test was a significant, characteristically provocative, and lasting contribution to the debate regarding artificial intelligence, which continues after more than half a century. Pattern formation and mathematical biology When Turing was 39 years old in 1951, he turned to mathematical biology, finally publishing his masterpiece "The Chemical Basis of Morphogenesis" in January 1952. He was interested in morphogenesis, the development of patterns and shapes in biological organisms. He suggested that a system of chemicals reacting with each other and diffusing across space, termed a reaction–diffusion system, could account for "the main phenomena of morphogenesis". He used systems of partial differential equations to model catalytic chemical reactions. For example, if a catalyst A is required for a certain chemical reaction to take place, and if the reaction produced more of the catalyst A, then we say that the reaction is autocatalytic, and there is positive feedback that can be modelled by nonlinear differential equations. Turing discovered that patterns could be created if the chemical reaction not only produced catalyst A, but also produced an inhibitor B that slowed down the production of A. If A and B then diffused through the container at different rates, then you could have some regions where A dominated and some where B did. To calculate the extent of this, Turing would have needed a powerful computer, but these were not so freely available in 1951, so he had to use linear approximations to solve the equations by hand. These calculations gave the right qualitative results, and produced, for example, a uniform mixture that oddly enough had regularly spaced fixed red spots. The Russian biochemist Boris Belousov had performed experiments with similar results, but could not get his papers published because of the contemporary prejudice that any such thing violated the second law of thermodynamics. Belousov was not aware of Turing's paper in the Philosophical Transactions of the Royal Society. Although published before the structure and role of DNA was understood, Turing's work on morphogenesis remains relevant today and is considered a seminal piece of work in mathematical biology. One of the early applications of Turing's paper was the work by James Murray explaining spots and stripes on the fur of cats, large and small. Further research in the area suggests that Turing's work can partially explain the growth of "feathers, hair follicles, the branching pattern of lungs, and even the left-right asymmetry that puts the heart on the left side of the chest". In 2012, Sheth, et al. found that in mice, removal of Hox genes causes an increase in the number of digits without an increase in the overall size of the limb, suggesting that Hox genes control digit formation by tuning the wavelength of a Turing-type mechanism. Later papers were not available until Collected Works of A. M. Turing was published in 1992. A study conducted in 2023 confirmed Turing's mathematical model hypothesis. Presented by the American Physical Society, the experiment involved growing chia seeds in even layers within trays, later adjusting the available moisture. Researchers experimentally tweaked the factors which appear in the Turing equations, and, as a result, patterns resembling those seen in natural environments emerged. This is believed to be the first time that experiments with living vegetation have verified Turing's mathematical insight. Personal life Treasure In the 1940s, Turing became worried about losing his savings in the event of a German invasion. In order to protect it, he bought two silver bars weighing and worth £250 (in 2022, £8,000 adjusted for inflation, £48,000 at spot price) and buried them in a wood near Bletchley Park. Upon returning to dig them up, Turing found that he was unable to break his own code describing where exactly he had hidden them. This, along with the fact that the area had been renovated, meant that he never regained the silver. Engagement In 1941, Turing proposed marriage to Hut 8 colleague Joan Clarke, a fellow mathematician and cryptanalyst, but their engagement was short-lived. After admitting his homosexuality to his fiancée, who was reportedly "unfazed" by the revelation, Turing decided that he could not go through with the marriage. Homosexuality and indecency conviction In January 1952, Turing was 39 when he started a relationship with Arnold Murray, a 19-year-old unemployed man. Just before Christmas, Turing was walking along Manchester's Oxford Road when he met Murray just outside the Regal Cinema and invited him to lunch. On 23 January, Turing's house was burgled. Murray told Turing that he and the burglar were acquainted, and Turing reported the crime to the police. During the investigation, he acknowledged a sexual relationship with Murray. Homosexual acts were criminal offences in the United Kingdom at that time, and both men were charged with "gross indecency" under Section 11 of the Criminal Law Amendment Act 1885. Initial committal proceedings for the trial were held on 27 February during which Turing's solicitor "reserved his defence", i.e., did not argue or provide evidence against the allegations. The proceedings were held at the Sessions House in Knutsford. Turing was later convinced by the advice of his brother and his own solicitor, and he entered a plea of guilty. The case, Regina v. Turing and Murray, was brought to trial on 31 March 1952. Turing was convicted and given a choice between imprisonment and probation. His probation would be conditional on his agreement to undergo hormonal physical changes designed to reduce libido, known as "chemical castration". He accepted the option of injections of what was then called stilboestrol (now known as diethylstilbestrol or DES), a synthetic oestrogen; this feminization of his body was continued for the course of one year. The treatment rendered Turing impotent and caused breast tissue to form, fulfilling in the literal sense Turing's prediction that "no doubt I shall emerge from it all a different man, but quite who I've not found out". Murray was given a conditional discharge. Turing's conviction led to the removal of his security clearance and barred him from continuing with his cryptographic consultancy for the Government Communications Headquarters (GCHQ), the British signals intelligence agency that had evolved from GC&CS in 1946, though he kept his academic job. His trial took place only months after the defection to the Soviet Union of Guy Burgess and Donald Maclean in summer 1951 after which the Foreign Office started to consider anyone known to be homosexual as a potential security risk. Turing was denied entry into the United States after his conviction in 1952, but was free to visit other European countries. In the summer of 1952 he visited Norway which was more tolerant of homosexuals. Among the various men he met there was one named Kjell Carlson. Kjell intended to visit Turing in the UK but the authorities intercepted Kjell's postcard detailing his travel arrangements and were able to intercept and deport him before the two could meet. It was also during this time that Turing started consulting a psychiatrist, Dr Franz Greenbaum, with whom he got on well and subsequently becoming a family friend. Death On 8 June 1954, at his house at 43 Adlington Road, Wilmslow, Turing's housekeeper found him dead. A post mortem was held that evening which determined that he had died the previous day at the age of 41 with Cyanide poisoning cited as the cause of death. When his body was discovered, an apple lay half-eaten beside his bed, and although the apple was not tested for cyanide, it was speculated that this was the means by which Turing had consumed a fatal dose. Turing's brother John identified the body the following day and took the advice given by Dr. Greenbaum to accept the verdict of the inquest as there was little prospect of establishing that the death was accidental. The inquest was held the following day which determined the cause of death to be suicide. Turing's remains were cremated at Woking Crematorium just two days later on 12 June 1954 with just three people attending and his ashes were scattered in the gardens of the crematorium, just as his father's had been. Turing's mother was on holiday in Italy at the time of his death and returned home after the inquest. She never accepted the verdict of suicide. Andrew Hodges and another biographer, David Leavitt, have both speculated that Turing was re-enacting a scene from the Walt Disney film Snow White and the Seven Dwarfs (1937), his favourite fairy tale. Both men noted that (in Leavitt's words) he took "an especially keen pleasure in the scene where the Wicked Queen immerses her apple in the poisonous brew". Philosopher Jack Copeland has questioned various aspects of the coroner's historical verdict. He suggested an alternative explanation for the cause of Turing's death: the accidental inhalation of cyanide fumes from an apparatus used to electroplate gold onto spoons. The potassium cyanide was used to dissolve the gold. Turing had such an apparatus set up in his tiny spare room. Copeland noted that the autopsy findings were more consistent with inhalation than with ingestion of the poison. Turing also habitually ate an apple before going to bed, and it was not unusual for the apple to be discarded half-eaten. Furthermore, Turing had reportedly borne his legal setbacks and hormone treatment (which had been discontinued a year previously) "with good humour" and had shown no sign of despondency before his death. He even set down a list of tasks that he intended to complete upon returning to his office after the holiday weekend. Turing's mother believed that the ingestion was accidental, resulting from her son's careless storage of laboratory chemicals. Biographer Andrew Hodges theorised that Turing deliberately left the nature of his death ambiguous in order to shield his mother from the knowledge that he had killed himself. It has been suggested that Turing's belief in fortune-telling may have caused his depressed mood. As a youth, Turing had been told by a fortune-teller that he would be a genius. In mid-May 1954, shortly before his death, Turing again decided to consult a fortune-teller during a day-trip to St Annes-on-Sea with the Greenbaum family. According to the Greenbaums' daughter, Barbara: Government apology and pardon In August 2009, British programmer John Graham-Cumming started a petition urging the British government to apologise for Turing's prosecution as a homosexual. The petition received more than 30,000 signatures. The prime minister, Gordon Brown, acknowledged the petition, releasing a statement on 10 September 2009 apologising and describing the treatment of Turing as "appalling": In December 2011, William Jones and his member of Parliament, John Leech, created an e-petition requesting that the British government pardon Turing for his conviction of "gross indecency": The petition gathered over 37,000 signatures, and was submitted to Parliament by the Manchester MP John Leech but the request was discouraged by Justice Minister Lord McNally, who said: John Leech, the MP for Manchester Withington (2005–15), submitted several bills to Parliament and led a high-profile campaign to secure the pardon. Leech made the case in the House of Commons that Turing's contribution to the war made him a national hero and that it was "ultimately just embarrassing" that the conviction still stood. Leech continued to take the bill through Parliament and campaigned for several years, gaining the public support of numerous leading scientists, including Stephen Hawking. At the British premiere of a film based on Turing's life, The Imitation Game, the producers thanked Leech for bringing the topic to public attention and securing Turing's pardon. Leech is now regularly described as the "architect" of Turing's pardon and subsequently the Alan Turing Law which went on to secure pardons for 75,000 other men and women convicted of similar crimes. On 26 July 2012, a bill was introduced in the House of Lords to grant a statutory pardon to Turing for offences under section 11 of the Criminal Law Amendment Act 1885, of which he was convicted on 31 March 1952. Late in the year in a letter to The Daily Telegraph, the physicist Stephen Hawking and 10 other signatories including the Astronomer Royal Lord Rees, President of the Royal Society Sir Paul Nurse, Lady Trumpington (who worked for Turing during the war) and Lord Sharkey (the bill's sponsor) called on Prime Minister David Cameron to act on the pardon request. The government indicated it would support the bill, and it passed its third reading in the House of Lords in October. At the bill's second reading in the House of Commons on 29 November 2013, Conservative MP Christopher Chope objected to the bill, delaying its passage. The bill was due to return to the House of Commons on 28 February 2014, but before the bill could be debated in the House of Commons, the government elected to proceed under the royal prerogative of mercy. On 24 December 2013, Queen Elizabeth II signed a pardon for Turing's conviction for "gross indecency", with immediate effect. Announcing the pardon, Lord Chancellor Chris Grayling said Turing deserved to be "remembered and recognised for his fantastic contribution to the war effort" and not for his later criminal conviction. The Queen officially pronounced Turing pardoned in August 2014. The Queen's action is only the fourth royal pardon granted since the conclusion of the Second World War. Pardons are normally granted only when the person is technically innocent, and a request has been made by the family or other interested party; neither condition was met in regard to Turing's conviction. In September 2016, the government announced its intention to expand this retroactive exoneration to other men convicted of similar historical indecency offences, in what was described as an "Alan Turing law". The Alan Turing law is now an informal term for the law in the United Kingdom, contained in the Policing and Crime Act 2017, which serves as an amnesty law to retroactively pardon men who were cautioned or convicted under historical legislation that outlawed homosexual acts. The law applies in England and Wales. On 19 July 2023, following an apology to LGBT veterans from the UK Government, Defence Secretary Ben Wallace suggested Turing should be honoured with a permanent statue on the fourth plinth of Trafalgar Square, describing Dr Turing as "probably the greatest war hero, in my book, of the Second World War, [whose] achievements shortened the war, saved thousands of lives, helped defeat the Nazis. And his story is a sad story of a society and how it treated him." See also Legacy of Alan Turing List of things named after Alan Turing Notes and references Notes References Sources in and Turing's mother, who survived him by many years, wrote this 157-page biography of her son, glorifying his life. It was published in 1959, and so could not cover his war work. Scarcely 300 copies were sold (Sara Turing to Lyn Newman, 1967, Library of St John's College, Cambridge). The six-page foreword by Lyn Irvine includes reminiscences and is more frequently quoted. It was re-published by Cambridge University Press in 2012, to honour the centenary of his birth, and included a new foreword by Martin Davis, as well as a never-before-published memoir by Turing's older brother John F. Turing. This 1986 Hugh Whitemore play tells the story of Turing's life and death. In the original West End and Broadway runs, Derek Jacobi played Turing and he recreated the role in a 1997 television film based on the play made jointly by the BBC and WGBH, Boston. The play is published by Amber Lane Press, Oxford, ASIN: B000B7TM0Q Further reading Articles Books (originally published in 1983); basis of the film The Imitation Game (originally published in 1959 by W. Heffer & Sons, Ltd) External links Oral history interview with Nicholas C. Metropolis, Charles Babbage Institute, University of Minnesota. Metropolis was the first director of computing services at Los Alamos National Laboratory; topics include the relationship between Turing and John von Neumann How Alan Turing Cracked The Enigma Code Imperial War Museums Alan Turing Year CiE 2012: Turing Centenary Conference Science in the Making Alan Turing's papers in the Royal Society's archives Alan Turing site maintained by Andrew Hodges including a short biography AlanTuring.net – Turing Archive for the History of Computing by Jack Copeland The Turing Archive – contains scans of some unpublished documents and material from the King's College, Cambridge archive Alan Turing Papers – University of Manchester Library, Manchester Sherborne School Archives – holds papers relating to Turing's time at Sherborne School Alan Turing plaques recorded on openplaques.org Alan Turing archive on New Scientist 1912 births 1954 suicides 1954 deaths 20th-century English mathematicians 20th-century atheists 20th-century English philosophers Academics of the University of Manchester Academics of the University of Manchester Institute of Science and Technology Alumni of King's College, Cambridge Artificial intelligence researchers Bayesian statisticians Bletchley Park people British anti-fascists British cryptographers British people of World War II Computability theorists Computer designers English atheists English computer scientists English inventors English logicians English male long-distance runners English people of Irish descent English people of Scottish descent Fellows of King's College, Cambridge Fellows of the Royal Society Former Protestants Foreign Office personnel of World War II Gay academics Gay scientists Gay sportsmen GCHQ people History of computing in the United Kingdom LGBT-related suicides LGBT mathematicians LGBT philosophers British LGBT scientists English LGBT sportspeople LGBT track and field athletes Officers of the Order of the British Empire People educated at Sherborne School People from Maida Vale People from Wilmslow People convicted for homosexuality in the United Kingdom People who have received posthumous pardons Princeton University alumni Recipients of British royal pardons Theoretical biologists Theoretical computer scientists Suicides by cyanide poisoning Suicides in England Castrated people Scientists of the National Physical Laboratory (United Kingdom) Computer chess people Enigma machine

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https://en.wikipedia.org/wiki/Area

Area

Area is the measure of a region's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analogue of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). Two different regions may have the same area (as in squaring the circle); by synecdoche, "area" sometimes is used to refer to the region, as in a "polygonal area". The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number. There are several well-known formulas for the areas of simple shapes such as triangles, rectangles, and circles. Using these formulas, the area of any polygon can be found by dividing the polygon into triangles. For shapes with curved boundary, calculus is usually required to compute the area. Indeed, the problem of determining the area of plane figures was a major motivation for the historical development of calculus. For a solid shape such as a sphere, cone, or cylinder, the area of its boundary surface is called the surface area. Formulas for the surface areas of simple shapes were computed by the ancient Greeks, but computing the surface area of a more complicated shape usually requires multivariable calculus. Area plays an important role in modern mathematics. In addition to its obvious importance in geometry and calculus, area is related to the definition of determinants in linear algebra, and is a basic property of surfaces in differential geometry. In analysis, the area of a subset of the plane is defined using Lebesgue measure, though not every subset is measurable. In general, area in higher mathematics is seen as a special case of volume for two-dimensional regions. Area can be defined through the use of axioms, defining it as a function of a collection of certain plane figures to the set of real numbers. It can be proved that such a function exists. Formal definition An approach to defining what is meant by "area" is through axioms. "Area" can be defined as a function from a collection M of a special kinds of plane figures (termed measurable sets) to the set of real numbers, which satisfies the following properties: For all S in M, . If S and T are in M then so are and , and also . If S and T are in M with then is in M and . If a set S is in M and S is congruent to T then T is also in M and . Every rectangle R is in M. If the rectangle has length h and breadth k then . Let Q be a set enclosed between two step regions S and T. A step region is formed from a finite union of adjacent rectangles resting on a common base, i.e. . If there is a unique number c such that for all such step regions S and T, then . It can be proved that such an area function actually exists. Units Every unit of length has a corresponding unit of area, namely the area of a square with the given side length. Thus areas can be measured in square metres (m2), square centimetres (cm2), square millimetres (mm2), square kilometres (km2), square feet (ft2), square yards (yd2), square miles (mi2), and so forth. Algebraically, these units can be thought of as the squares of the corresponding length units. The SI unit of area is the square metre, which is considered an SI derived unit. Conversions Calculation of the area of a square whose length and width are 1 metre would be: 1 metre × 1 metre = 1 m2 and so, a rectangle with different sides (say length of 3 metres and width of 2 metres) would have an area in square units that can be calculated as: 3 metres × 2 metres = 6 m2. This is equivalent to 6 million square millimetres. Other useful conversions are: 1 square kilometre = 1,000,000 square metres 1 square metre = 10,000 square centimetres = 1,000,000 square millimetres 1 square centimetre = 100 square millimetres. Non-metric units In non-metric units, the conversion between two square units is the square of the conversion between the corresponding length units. 1 foot = 12 inches, the relationship between square feet and square inches is 1 square foot = 144 square inches, where 144 = 122 = 12 × 12. Similarly: 1 square yard = 9 square feet 1 square mile = 3,097,600 square yards = 27,878,400 square feet In addition, conversion factors include: 1 square inch = 6.4516 square centimetres 1 square foot = square metres 1 square yard = square metres 1 square mile = square kilometres Other units including historical There are several other common units for area. The are was the original unit of area in the metric system, with: 1 are = 100 square metres Though the are has fallen out of use, the hectare is still commonly used to measure land: 1 hectare = 100 ares = 10,000 square metres = 0.01 square kilometres Other uncommon metric units of area include the tetrad, the hectad, and the myriad. The acre is also commonly used to measure land areas, where 1 acre = 4,840 square yards = 43,560 square feet. An acre is approximately 40% of a hectare. On the atomic scale, area is measured in units of barns, such that: 1 barn = 10−28 square meters. The barn is commonly used in describing the cross-sectional area of interaction in nuclear physics. In South Asia (mainly Indians), although the countries use SI units as official, many South Asians still use traditional units. Each administrative division has its own area unit, some of them have same names, but with different values. There's no official consensus about the traditional units values. Thus, the conversions between the SI units and the traditional units may have different results, depending on what reference that has been used. Some traditional South Asian units that have fixed value: 1 Killa = 1 acre 1 Ghumaon = 1 acre 1 Kanal = 0.125 acre (1 acre = 8 kanal) 1 Decimal = 48.4 square yards 1 Chatak = 180 square feet History Circle area In the 5th century BCE, Hippocrates of Chios was the first to show that the area of a disk (the region enclosed by a circle) is proportional to the square of its diameter, as part of his quadrature of the lune of Hippocrates, but did not identify the constant of proportionality. Eudoxus of Cnidus, also in the 5th century BCE, also found that the area of a disk is proportional to its radius squared. Subsequently, Book I of Euclid's Elements dealt with equality of areas between two-dimensional figures. The mathematician Archimedes used the tools of Euclidean geometry to show that the area inside a circle is equal to that of a right triangle whose base has the length of the circle's circumference and whose height equals the circle's radius, in his book Measurement of a Circle. (The circumference is 2r, and the area of a triangle is half the base times the height, yielding the area r2 for the disk.) Archimedes approximated the value of π (and hence the area of a unit-radius circle) with his doubling method, in which he inscribed a regular triangle in a circle and noted its area, then doubled the number of sides to give a regular hexagon, then repeatedly doubled the number of sides as the polygon's area got closer and closer to that of the circle (and did the same with circumscribed polygons). Triangle area Quadrilateral area In the 7th century CE, Brahmagupta developed a formula, now known as Brahmagupta's formula, for the area of a cyclic quadrilateral (a quadrilateral inscribed in a circle) in terms of its sides. In 1842, the German mathematicians Carl Anton Bretschneider and Karl Georg Christian von Staudt independently found a formula, known as Bretschneider's formula, for the area of any quadrilateral. General polygon area The development of Cartesian coordinates by René Descartes in the 17th century allowed the development of the surveyor's formula for the area of any polygon with known vertex locations by Gauss in the 19th century. Areas determined using calculus The development of integral calculus in the late 17th century provided tools that could subsequently be used for computing more complicated areas, such as the area of an ellipse and the surface areas of various curved three-dimensional objects. Area formulas Polygon formulas For a non-self-intersecting (simple) polygon, the Cartesian coordinates (i=0, 1, ..., n-1) of whose n vertices are known, the area is given by the surveyor's formula: where when i=n-1, then i+1 is expressed as modulus n and so refers to 0. Rectangles The most basic area formula is the formula for the area of a rectangle. Given a rectangle with length and width , the formula for the area is:  (rectangle). That is, the area of the rectangle is the length multiplied by the width. As a special case, as in the case of a square, the area of a square with side length is given by the formula:  (square). The formula for the area of a rectangle follows directly from the basic properties of area, and is sometimes taken as a definition or axiom. On the other hand, if geometry is developed before arithmetic, this formula can be used to define multiplication of real numbers. Dissection, parallelograms, and triangles Most other simple formulas for area follow from the method of dissection. This involves cutting a shape into pieces, whose areas must sum to the area of the original shape. For an example, any parallelogram can be subdivided into a trapezoid and a right triangle, as shown in figure to the left. If the triangle is moved to the other side of the trapezoid, then the resulting figure is a rectangle. It follows that the area of the parallelogram is the same as the area of the rectangle:  (parallelogram). However, the same parallelogram can also be cut along a diagonal into two congruent triangles, as shown in the figure to the right. It follows that the area of each triangle is half the area of the parallelogram:  (triangle). Similar arguments can be used to find area formulas for the trapezoid as well as more complicated polygons. Area of curved shapes Circles The formula for the area of a circle (more properly called the area enclosed by a circle or the area of a disk) is based on a similar method. Given a circle of radius , it is possible to partition the circle into sectors, as shown in the figure to the right. Each sector is approximately triangular in shape, and the sectors can be rearranged to form an approximate parallelogram. The height of this parallelogram is , and the width is half the circumference of the circle, or . Thus, the total area of the circle is :  (circle). Though the dissection used in this formula is only approximate, the error becomes smaller and smaller as the circle is partitioned into more and more sectors. The limit of the areas of the approximate parallelograms is exactly , which is the area of the circle. This argument is actually a simple application of the ideas of calculus. In ancient times, the method of exhaustion was used in a similar way to find the area of the circle, and this method is now recognized as a precursor to integral calculus. Using modern methods, the area of a circle can be computed using a definite integral: Ellipses The formula for the area enclosed by an ellipse is related to the formula of a circle; for an ellipse with semi-major and semi-minor axes and the formula is: Non-planar surface area Most basic formulas for surface area can be obtained by cutting surfaces and flattening them out (see: developable surfaces). For example, if the side surface of a cylinder (or any prism) is cut lengthwise, the surface can be flattened out into a rectangle. Similarly, if a cut is made along the side of a cone, the side surface can be flattened out into a sector of a circle, and the resulting area computed. The formula for the surface area of a sphere is more difficult to derive: because a sphere has nonzero Gaussian curvature, it cannot be flattened out. The formula for the surface area of a sphere was first obtained by Archimedes in his work On the Sphere and Cylinder. The formula is:  (sphere), where is the radius of the sphere. As with the formula for the area of a circle, any derivation of this formula inherently uses methods similar to calculus. General formulas Areas of 2-dimensional figures A triangle: (where B is any side, and h is the distance from the line on which B lies to the other vertex of the triangle). This formula can be used if the height h is known. If the lengths of the three sides are known then Heron's formula can be used: where a, b, c are the sides of the triangle, and is half of its perimeter. If an angle and its two included sides are given, the area is where is the given angle and and are its included sides. If the triangle is graphed on a coordinate plane, a matrix can be used and is simplified to the absolute value of . This formula is also known as the shoelace formula and is an easy way to solve for the area of a coordinate triangle by substituting the 3 points (x1,y1), (x2,y2), and (x3,y3). The shoelace formula can also be used to find the areas of other polygons when their vertices are known. Another approach for a coordinate triangle is to use calculus to find the area. A simple polygon constructed on a grid of equal-distanced points (i.e., points with integer coordinates) such that all the polygon's vertices are grid points: , where i is the number of grid points inside the polygon and b is the number of boundary points. This result is known as Pick's theorem. Area in calculus The area between a positive-valued curve and the horizontal axis, measured between two values a and b (b is defined as the larger of the two values) on the horizontal axis, is given by the integral from a to b of the function that represents the curve: The area between the graphs of two functions is equal to the integral of one function, f(x), minus the integral of the other function, g(x): where is the curve with the greater y-value. An area bounded by a function expressed in polar coordinates is: The area enclosed by a parametric curve with endpoints is given by the line integrals: or the z-component of (For details, see .) This is the principle of the planimeter mechanical device. Bounded area between two quadratic functions To find the bounded area between two quadratic functions, we subtract one from the other to write the difference as where f(x) is the quadratic upper bound and g(x) is the quadratic lower bound. Define the discriminant of f(x)-g(x) as By simplifying the integral formula between the graphs of two functions (as given in the section above) and using Vieta's formula, we can obtain The above remains valid if one of the bounding functions is linear instead of quadratic. Surface area of 3-dimensional figures Cone: , where r is the radius of the circular base, and h is the height. That can also be rewritten as or where r is the radius and l is the slant height of the cone. is the base area while is the lateral surface area of the cone. Cube: , where s is the length of an edge. Cylinder: , where r is the radius of a base and h is the height. The can also be rewritten as , where d is the diameter. Prism: , where B is the area of a base, P is the perimeter of a base, and h is the height of the prism. pyramid: , where B is the area of the base, P is the perimeter of the base, and L is the length of the slant. Rectangular prism: , where is the length, w is the width, and h is the height. General formula for surface area The general formula for the surface area of the graph of a continuously differentiable function where and is a region in the xy-plane with the smooth boundary: An even more general formula for the area of the graph of a parametric surface in the vector form where is a continuously differentiable vector function of is: List of formulas The above calculations show how to find the areas of many common shapes. The areas of irregular (and thus arbitrary) polygons can be calculated using the "Surveyor's formula" (shoelace formula). Relation of area to perimeter The isoperimetric inequality states that, for a closed curve of length L (so the region it encloses has perimeter L) and for area A of the region that it encloses, and equality holds if and only if the curve is a circle. Thus a circle has the largest area of any closed figure with a given perimeter. At the other extreme, a figure with given perimeter L could have an arbitrarily small area, as illustrated by a rhombus that is "tipped over" arbitrarily far so that two of its angles are arbitrarily close to 0° and the other two are arbitrarily close to 180°. For a circle, the ratio of the area to the circumference (the term for the perimeter of a circle) equals half the radius r. This can be seen from the area formula πr2 and the circumference formula 2πr. The area of a regular polygon is half its perimeter times the apothem (where the apothem is the distance from the center to the nearest point on any side). Fractals Doubling the edge lengths of a polygon multiplies its area by four, which is two (the ratio of the new to the old side length) raised to the power of two (the dimension of the space the polygon resides in). But if the one-dimensional lengths of a fractal drawn in two dimensions are all doubled, the spatial content of the fractal scales by a power of two that is not necessarily an integer. This power is called the fractal dimension of the fractal. Area bisectors There are an infinitude of lines that bisect the area of a triangle. Three of them are the medians of the triangle (which connect the sides' midpoints with the opposite vertices), and these are concurrent at the triangle's centroid; indeed, they are the only area bisectors that go through the centroid. Any line through a triangle that splits both the triangle's area and its perimeter in half goes through the triangle's incenter (the center of its incircle). There are either one, two, or three of these for any given triangle. Any line through the midpoint of a parallelogram bisects the area. All area bisectors of a circle or other ellipse go through the center, and any chords through the center bisect the area. In the case of a circle they are the diameters of the circle. Optimization Given a wire contour, the surface of least area spanning ("filling") it is a minimal surface. Familiar examples include soap bubbles. The question of the filling area of the Riemannian circle remains open. The circle has the largest area of any two-dimensional object having the same perimeter. A cyclic polygon (one inscribed in a circle) has the largest area of any polygon with a given number of sides of the same lengths. A version of the isoperimetric inequality for triangles states that the triangle of greatest area among all those with a given perimeter is equilateral. The triangle of largest area of all those inscribed in a given circle is equilateral; and the triangle of smallest area of all those circumscribed around a given circle is equilateral. The ratio of the area of the incircle to the area of an equilateral triangle, , is larger than that of any non-equilateral triangle. The ratio of the area to the square of the perimeter of an equilateral triangle, is larger than that for any other triangle. See also Brahmagupta quadrilateral, a cyclic quadrilateral with integer sides, integer diagonals, and integer area. Equiareal map Heronian triangle, a triangle with integer sides and integer area. List of triangle inequalities One-seventh area triangle, an inner triangle with one-seventh the area of the reference triangle. Routh's theorem, a generalization of the one-seventh area triangle. Orders of magnitude—A list of areas by size. Derivation of the formula of a pentagon Planimeter, an instrument for measuring small areas, e.g. on maps. Area of a convex quadrilateral Robbins pentagon, a cyclic pentagon whose side lengths and area are all rational numbers. References External links

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https://en.wikipedia.org/wiki/Ada%20%28programming%20language%29

Ada (programming language)

Ada is a structured, statically typed, imperative, and object-oriented high-level programming language, inspired by Pascal and other languages. It has built-in language support for design by contract (DbC), extremely strong typing, explicit concurrency, tasks, synchronous message passing, protected objects, and non-determinism. Ada improves code safety and maintainability by using the compiler to find errors in favor of runtime errors. Ada is an international technical standard, jointly defined by the International Organization for Standardization (ISO), and the International Electrotechnical Commission (IEC). , the standard, called Ada 2012 informally, is ISO/IEC 8652:2012. Ada was originally designed by a team led by French computer scientist Jean Ichbiah of Honeywell under contract to the United States Department of Defense (DoD) from 1977 to 1983 to supersede over 450 programming languages used by the DoD at that time. Ada was named after Ada Lovelace (1815–1852), who has been credited as the first computer programmer. Features Ada was originally designed for embedded and real-time systems. The Ada 95 revision, designed by S. Tucker Taft of Intermetrics between 1992 and 1995, improved support for systems, numerical, financial, and object-oriented programming (OOP). Features of Ada include: strong typing, modular programming mechanisms (packages), run-time checking, parallel processing (tasks, synchronous message passing, protected objects, and nondeterministic select statements), exception handling, and generics. Ada 95 added support for object-oriented programming, including dynamic dispatch. The syntax of Ada minimizes choices of ways to perform basic operations, and prefers English keywords (such as "or else" and "and then") to symbols (such as "||" and "&&"). Ada uses the basic arithmetical operators "+", "-", "*", and "/", but avoids using other symbols. Code blocks are delimited by words such as "declare", "begin", and "end", where the "end" (in most cases) is followed by the identifier of the block it closes (e.g., if ... end if, loop ... end loop). In the case of conditional blocks this avoids a dangling else that could pair with the wrong nested if-expression in other languages like C or Java. Ada is designed for developing very large software systems. Ada packages can be compiled separately. Ada package specifications (the package interface) can also be compiled separately without the implementation to check for consistency. This makes it possible to detect problems early during the design phase, before implementation starts. A large number of compile-time checks are supported to help avoid bugs that would not be detectable until run-time in some other languages or would require explicit checks to be added to the source code. For example, the syntax requires explicitly named closing of blocks to prevent errors due to mismatched end tokens. The adherence to strong typing allows detecting many common software errors (wrong parameters, range violations, invalid references, mismatched types, etc.) either during compile-time, or otherwise during run-time. As concurrency is part of the language specification, the compiler can in some cases detect potential deadlocks. Compilers also commonly check for misspelled identifiers, visibility of packages, redundant declarations, etc. and can provide warnings and useful suggestions on how to fix the error. Ada also supports run-time checks to protect against access to unallocated memory, buffer overflow errors, range violations, off-by-one errors, array access errors, and other detectable bugs. These checks can be disabled in the interest of runtime efficiency, but can often be compiled efficiently. It also includes facilities to help program verification. For these reasons, Ada is widely used in critical systems, where any anomaly might lead to very serious consequences, e.g., accidental death, injury or severe financial loss. Examples of systems where Ada is used include avionics, air traffic control, railways, banking, military and space technology. Ada's dynamic memory management is high-level and type-safe. Ada has no generic or untyped pointers; nor does it implicitly declare any pointer type. Instead, all dynamic memory allocation and deallocation must occur via explicitly declared access types. Each access type has an associated storage pool that handles the low-level details of memory management; the programmer can either use the default storage pool or define new ones (this is particularly relevant for Non-Uniform Memory Access). It is even possible to declare several different access types that all designate the same type but use different storage pools. Also, the language provides for accessibility checks, both at compile time and at run time, that ensures that an access value cannot outlive the type of the object it points to. Though the semantics of the language allow automatic garbage collection of inaccessible objects, most implementations do not support it by default, as it would cause unpredictable behaviour in real-time systems. Ada does support a limited form of region-based memory management; also, creative use of storage pools can provide for a limited form of automatic garbage collection, since destroying a storage pool also destroys all the objects in the pool. A double-dash ("--"), resembling an em dash, denotes comment text. Comments stop at end of line, to prevent unclosed comments from accidentally voiding whole sections of source code. Disabling a whole block of code now requires the prefixing of each line (or column) individually with "--". While clearly denoting disabled code with a column of repeated "--" down the page, this renders the experimental dis/re-enablement of large blocks a more drawn out process. The semicolon (";") is a statement terminator, and the null or no-operation statement is null;. A single ; without a statement to terminate is not allowed. Unlike most ISO standards, the Ada language definition (known as the Ada Reference Manual or ARM, or sometimes the Language Reference Manual or LRM) is free content. Thus, it is a common reference for Ada programmers, not only programmers implementing Ada compilers. Apart from the reference manual, there is also an extensive rationale document which explains the language design and the use of various language constructs. This document is also widely used by programmers. When the language was revised, a new rationale document was written. One notable free software tool that is used by many Ada programmers to aid them in writing Ada source code is the GNAT Programming Studio, and GNAT which is part of the GNU Compiler Collection. History In the 1970s the US Department of Defense (DoD) became concerned by the number of different programming languages being used for its embedded computer system projects, many of which were obsolete or hardware-dependent, and none of which supported safe modular programming. In 1975, a working group, the High Order Language Working Group (HOLWG), was formed with the intent to reduce this number by finding or creating a programming language generally suitable for the department's and the UK Ministry of Defence's requirements. After many iterations beginning with an original straw-man proposal the eventual programming language was named Ada. The total number of high-level programming languages in use for such projects fell from over 450 in 1983 to 37 by 1996. HOLWG crafted the Steelman language requirements, a series of documents stating the requirements they felt a programming language should satisfy. Many existing languages were formally reviewed, but the team concluded in 1977 that no existing language met the specifications. Requests for proposals for a new programming language were issued and four contractors were hired to develop their proposals under the names of Red (Intermetrics led by Benjamin Brosgol), Green (Honeywell, led by Jean Ichbiah), Blue (SofTech, led by John Goodenough) and Yellow (SRI International, led by Jay Spitzen). In April 1978, after public scrutiny, the Red and Green proposals passed to the next phase. In May 1979, the Green proposal, designed by Jean Ichbiah at Honeywell, was chosen and given the name Ada—after Augusta Ada, Countess of Lovelace. This proposal was influenced by the language LIS that Ichbiah and his group had developed in the 1970s. The preliminary Ada reference manual was published in ACM SIGPLAN Notices in June 1979. The Military Standard reference manual was approved on December 10, 1980 (Ada Lovelace's birthday), and given the number MIL-STD-1815 in honor of Ada Lovelace's birth year. In 1981, C. A. R. Hoare took advantage of his Turing Award speech to criticize Ada for being overly complex and hence unreliable, but subsequently seemed to recant in the foreword he wrote for an Ada textbook. Ada attracted much attention from the programming community as a whole during its early days. Its backers and others predicted that it might become a dominant language for general purpose programming and not only defense-related work. Ichbiah publicly stated that within ten years, only two programming languages would remain: Ada and Lisp. Early Ada compilers struggled to implement the large, complex language, and both compile-time and run-time performance tended to be slow and tools primitive. Compiler vendors expended most of their efforts in passing the massive, language-conformance-testing, government-required Ada Compiler Validation Capability (ACVC) validation suite that was required in another novel feature of the Ada language effort. The Jargon File, a dictionary of computer hacker slang originating in 1975–1983, notes in an entry on Ada that "it is precisely what one might expect given that kind of endorsement by fiat; designed by committee...difficult to use, and overall a disastrous, multi-billion-dollar boondoggle...Ada Lovelace...would almost certainly blanch at the use her name has been latterly put to; the kindest thing that has been said about it is that there is probably a good small language screaming to get out from inside its vast, elephantine bulk." The first validated Ada implementation was the NYU Ada/Ed translator, certified on April 11, 1983. NYU Ada/Ed is implemented in the high-level set language SETL. Several commercial companies began offering Ada compilers and associated development tools, including Alsys, TeleSoft, DDC-I, Advanced Computer Techniques, Tartan Laboratories, Irvine Compiler, TLD Systems, and Verdix. Computer manufacturers who had a significant business in the defense, aerospace, or related industries, also offered Ada compilers and tools on their platforms; these included Concurrent Computer Corporation, Cray Research, Inc., Digital Equipment Corporation, Harris Computer Systems, and Siemens Nixdorf Informationssysteme AG. In 1991, the US Department of Defense began to require the use of Ada (the Ada mandate) for all software, though exceptions to this rule were often granted. The Department of Defense Ada mandate was effectively removed in 1997, as the DoD began to embrace commercial off-the-shelf (COTS) technology. Similar requirements existed in other NATO countries: Ada was required for NATO systems involving command and control and other functions, and Ada was the mandated or preferred language for defense-related applications in countries such as Sweden, Germany, and Canada. By the late 1980s and early 1990s, Ada compilers had improved in performance, but there were still barriers to fully exploiting Ada's abilities, including a tasking model that was different from what most real-time programmers were used to. Because of Ada's safety-critical support features, it is now used not only for military applications, but also in commercial projects where a software bug can have severe consequences, e.g., avionics and air traffic control, commercial rockets such as the Ariane 4 and 5, satellites and other space systems, railway transport and banking. For example, the Primary Flight Control System, the fly-by-wire system software in the Boeing 777, was written in Ada, as were the fly-by-wire systems for the aerodynamically unstable Eurofighter, Gripen, F-22 Raptor and the DFCS replacement flight control system for the F-14 Tomcat. The Canadian Automated Air Traffic System was written in 1 million lines of Ada (SLOC count). It featured advanced distributed processing, a distributed Ada database, and object-oriented design. Ada is also used in other air traffic systems, e.g., the UK's next-generation Interim Future Area Control Tools Support () air traffic control system is designed and implemented using SPARK Ada. It is also used in the French TVM in-cab signalling system on the TGV high-speed rail system, and the metro suburban trains in Paris, London, Hong Kong and New York City. Standardization Preliminary Ada can be found in ACM Sigplan Notices Vol 14, No 6, June 1979. Ada was first published in 1980 as an ANSI standard ANSI/MIL-STD 1815. As this very first version held many errors and inconsistencies (see Summary of Ada Language Changes), the revised edition was published in 1983 as ANSI/MIL-STD 1815A. Without any further changes, it became an ISO standard in 1987, ISO 8652:1987. This version of the language is commonly known as Ada 83, from the date of its adoption by ANSI, but is sometimes referred to also as Ada 87, from the date of its adoption by ISO. This is the Ada 83 Reference Manual. There is also a French translation; DIN translated it into German as DIN 66268 in 1988. Ada 95, the joint ISO/IEC/ANSI standard ISO/IEC 8652:1995 (see Ada 95 RM) was published in February 1995, making it the first ISO standard object-oriented programming language. To help with the standard revision and future acceptance, the US Air Force funded the development of the GNAT Compiler. Presently, the GNAT Compiler is part of the GNU Compiler Collection. Work has continued on improving and updating the technical content of the Ada language. A Technical Corrigendum to Ada 95 was published in October 2001, ISO/IEC 8652:1995/Corr 1:2001 (see Ada 95 RM with TC 1), and a major Amendment, ISO/IEC 8652:1995/Amd 1:2007 (see Ada 2005 RM) was published on March 9, 2007, commonly known as Ada 2005 because work on the new standard was finished that year. At the Ada-Europe 2012 conference in Stockholm, the Ada Resource Association (ARA) and Ada-Europe announced the completion of the design of the latest version of the Ada language and the submission of the reference manual to the ISO/IEC JTC 1/SC 22/WG 9 of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) for approval. ISO/IEC 8652:2012 (see Ada 2012 RM) was published in December 2012, known as Ada 2012. A technical corrigendum was published ISO/IEC 8652:2012/COR 1:2016 (see RM 2012 with TC 1). Despite the names Ada 83, 95 etc., legally there is only one Ada standard, the one of the last ISO/IEC standard: with the acceptance of a new standard version, the previous one becomes withdrawn. The other names are just informal ones referencing a certain edition. Other related standards include ISO/IEC 8651-3:1988 Information processing systems—Computer graphics—Graphical Kernel System (GKS) language bindings—Part 3: Ada. Language constructs Ada is an ALGOL-like programming language featuring control structures with reserved words such as if, then, else, while, for, and so on. However, Ada also has many data structuring facilities and other abstractions which were not included in the original ALGOL 60, such as type definitions, records, pointers, enumerations. Such constructs were in part inherited from or inspired by Pascal. "Hello, world!" in Ada A common example of a language's syntax is the Hello world program: (hello.adb) with Ada.Text_IO; procedure Hello is begin Ada.Text_IO.Put_Line ("Hello, world!"); end Hello; This program can be compiled by using the freely available open source compiler GNAT, by executing gnatmake hello.adb Data types Ada's type system is not based on a set of predefined primitive types but allows users to declare their own types. This declaration in turn is not based on the internal representation of the type but on describing the goal which should be achieved. This allows the compiler to determine a suitable memory size for the type, and to check for violations of the type definition at compile time and run time (i.e., range violations, buffer overruns, type consistency, etc.). Ada supports numerical types defined by a range, modulo types, aggregate types (records and arrays), and enumeration types. Access types define a reference to an instance of a specified type; untyped pointers are not permitted. Special types provided by the language are task types and protected types. For example, a date might be represented as: type Day_type is range 1 .. 31; type Month_type is range 1 .. 12; type Year_type is range 1800 .. 2100; type Hours is mod 24; type Weekday is (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday); type Date is record Day : Day_type; Month : Month_type; Year : Year_type; end record; Important to note: Day_type, Month_type, Year_type, Hours are incompatible types, meaning that for instance the following expression is illegal: Today: Day_type := 4; Current_Month: Month_type := 10; ... Today + Current_Month ... -- illegal The predefined plus-operator can only add values of the same type, so the expression is illegal. Types can be refined by declaring subtypes: subtype Working_Hours is Hours range 0 .. 12; -- at most 12 Hours to work a day subtype Working_Day is Weekday range Monday .. Friday; -- Days to work Work_Load: constant array(Working_Day) of Working_Hours -- implicit type declaration := (Friday => 6, Monday => 4, others => 10); -- lookup table for working hours with initialization Types can have modifiers such as limited, abstract, private etc. Private types do not show their inner structure; objects of limited types cannot be copied. Ada 95 adds further features for object-oriented extension of types. Control structures Ada is a structured programming language, meaning that the flow of control is structured into standard statements. All standard constructs and deep-level early exit are supported, so the use of the also supported "go to" commands is seldom needed. -- while a is not equal to b, loop. while a /= b loop Ada.Text_IO.Put_Line ("Waiting"); end loop; if a > b then Ada.Text_IO.Put_Line ("Condition met"); else Ada.Text_IO.Put_Line ("Condition not met"); end if; for i in 1 .. 10 loop Ada.Text_IO.Put ("Iteration: "); Ada.Text_IO.Put (i); Ada.Text_IO.Put_Line; end loop; loop a := a + 1; exit when a = 10; end loop; case i is when 0 => Ada.Text_IO.Put ("zero"); when 1 => Ada.Text_IO.Put ("one"); when 2 => Ada.Text_IO.Put ("two"); -- case statements have to cover all possible cases: when others => Ada.Text_IO.Put ("none of the above"); end case; for aWeekday in Weekday'Range loop -- loop over an enumeration Put_Line ( Weekday'Image(aWeekday) ); -- output string representation of an enumeration if aWeekday in Working_Day then -- check of a subtype of an enumeration Put_Line ( " to work for " & Working_Hours'Image (Work_Load(aWeekday)) ); -- access into a lookup table end if; end loop; Packages, procedures and functions Among the parts of an Ada program are packages, procedures and functions. Example: Package specification (example.ads) package Example is type Number is range 1 .. 11; procedure Print_and_Increment (j: in out Number); end Example; Package body (example.adb) with Ada.Text_IO; package body Example is i : Number := Number'First; procedure Print_and_Increment (j: in out Number) is function Next (k: in Number) return Number is begin return k + 1; end Next; begin Ada.Text_IO.Put_Line ( "The total is: " & Number'Image(j) ); j := Next (j); end Print_and_Increment; -- package initialization executed when the package is elaborated begin while i < Number'Last loop Print_and_Increment (i); end loop; end Example; This program can be compiled, e.g., by using the freely available open-source compiler GNAT, by executing gnatmake -z example.adb Packages, procedures and functions can nest to any depth, and each can also be the logical outermost block. Each package, procedure or function can have its own declarations of constants, types, variables, and other procedures, functions and packages, which can be declared in any order. Concurrency Ada has language support for task-based concurrency. The fundamental concurrent unit in Ada is a task, which is a built-in limited type. Tasks are specified in two parts – the task declaration defines the task interface (similar to a type declaration), the task body specifies the implementation of the task. Depending on the implementation, Ada tasks are either mapped to operating system threads or processes, or are scheduled internally by the Ada runtime. Tasks can have entries for synchronisation (a form of synchronous message passing). Task entries are declared in the task specification. Each task entry can have one or more accept statements within the task body. If the control flow of the task reaches an accept statement, the task is blocked until the corresponding entry is called by another task (similarly, a calling task is blocked until the called task reaches the corresponding accept statement). Task entries can have parameters similar to procedures, allowing tasks to synchronously exchange data. In conjunction with select statements it is possible to define guards on accept statements (similar to Dijkstra's guarded commands). Ada also offers protected objects for mutual exclusion. Protected objects are a monitor-like construct, but use guards instead of conditional variables for signaling (similar to conditional critical regions). Protected objects combine the data encapsulation and safe mutual exclusion from monitors, and entry guards from conditional critical regions. The main advantage over classical monitors is that conditional variables are not required for signaling, avoiding potential deadlocks due to incorrect locking semantics. Like tasks, the protected object is a built-in limited type, and it also has a declaration part and a body. A protected object consists of encapsulated private data (which can only be accessed from within the protected object), and procedures, functions and entries which are guaranteed to be mutually exclusive (with the only exception of functions, which are required to be side effect free and can therefore run concurrently with other functions). A task calling a protected object is blocked if another task is currently executing inside the same protected object, and released when this other task leaves the protected object. Blocked tasks are queued on the protected object ordered by time of arrival. Protected object entries are similar to procedures, but additionally have guards. If a guard evaluates to false, a calling task is blocked and added to the queue of that entry; now another task can be admitted to the protected object, as no task is currently executing inside the protected object. Guards are re-evaluated whenever a task leaves the protected object, as this is the only time when the evaluation of guards can have changed. Calls to entries can be requeued to other entries with the same signature. A task that is requeued is blocked and added to the queue of the target entry; this means that the protected object is released and allows admission of another task. The select statement in Ada can be used to implement non-blocking entry calls and accepts, non-deterministic selection of entries (also with guards), time-outs and aborts. The following example illustrates some concepts of concurrent programming in Ada. with Ada.Text_IO; use Ada.Text_IO; procedure Traffic is type Airplane_ID is range 1..10; -- 10 airplanes task type Airplane (ID: Airplane_ID); -- task representing airplanes, with ID as initialisation parameter type Airplane_Access is access Airplane; -- reference type to Airplane protected type Runway is -- the shared runway (protected to allow concurrent access) entry Assign_Aircraft (ID: Airplane_ID); -- all entries are guaranteed mutually exclusive entry Cleared_Runway (ID: Airplane_ID); entry Wait_For_Clear; private Clear: Boolean := True; -- protected private data - generally more than only a flag... end Runway; type Runway_Access is access all Runway; -- the air traffic controller task takes requests for takeoff and landing task type Controller (My_Runway: Runway_Access) is -- task entries for synchronous message passing entry Request_Takeoff (ID: in Airplane_ID; Takeoff: out Runway_Access); entry Request_Approach(ID: in Airplane_ID; Approach: out Runway_Access); end Controller; -- allocation of instances Runway1 : aliased Runway; -- instantiate a runway Controller1: Controller (Runway1'Access); -- and a controller to manage it ------ the implementations of the above types ------ protected body Runway is entry Assign_Aircraft (ID: Airplane_ID) when Clear is -- the entry guard - calling tasks are blocked until the condition is true begin Clear := False; Put_Line (Airplane_ID'Image (ID) & " on runway "); end; entry Cleared_Runway (ID: Airplane_ID) when not Clear is begin Clear := True; Put_Line (Airplane_ID'Image (ID) & " cleared runway "); end; entry Wait_For_Clear when Clear is begin null; -- no need to do anything here - a task can only enter if "Clear" is true end; end Runway; task body Controller is begin loop My_Runway.Wait_For_Clear; -- wait until runway is available (blocking call) select -- wait for two types of requests (whichever is runnable first) when Request_Approach'count = 0 => -- guard statement - only accept if there are no tasks queuing on Request_Approach accept Request_Takeoff (ID: in Airplane_ID; Takeoff: out Runway_Access) do -- start of synchronized part My_Runway.Assign_Aircraft (ID); -- reserve runway (potentially blocking call if protected object busy or entry guard false) Takeoff := My_Runway; -- assign "out" parameter value to tell airplane which runway end Request_Takeoff; -- end of the synchronised part or accept Request_Approach (ID: in Airplane_ID; Approach: out Runway_Access) do My_Runway.Assign_Aircraft (ID); Approach := My_Runway; end Request_Approach; or -- terminate if no tasks left who could call terminate; end select; end loop; end; task body Airplane is Rwy : Runway_Access; begin Controller1.Request_Takeoff (ID, Rwy); -- This call blocks until Controller task accepts and completes the accept block Put_Line (Airplane_ID'Image (ID) & " taking off..."); delay 2.0; Rwy.Cleared_Runway (ID); -- call will not block as "Clear" in Rwy is now false and no other tasks should be inside protected object delay 5.0; -- fly around a bit... loop select -- try to request a runway Controller1.Request_Approach (ID, Rwy); -- this is a blocking call - will run on controller reaching accept block and return on completion exit; -- if call returned we're clear for landing - leave select block and proceed... or delay 3.0; -- timeout - if no answer in 3 seconds, do something else (everything in following block) Put_Line (Airplane_ID'Image (ID) & " in holding pattern"); -- simply print a message end select; end loop; delay 4.0; -- do landing approach... Put_Line (Airplane_ID'Image (ID) & " touched down!"); Rwy.Cleared_Runway (ID); -- notify runway that we're done here. end; New_Airplane: Airplane_Access; begin for I in Airplane_ID'Range loop -- create a few airplane tasks New_Airplane := new Airplane (I); -- will start running directly after creation delay 4.0; end loop; end Traffic; Pragmas A pragma is a compiler directive that conveys information to the compiler to allow specific manipulating of compiled output. Certain pragmas are built into the language, while others are implementation-specific. Examples of common usage of compiler pragmas would be to disable certain features, such as run-time type checking or array subscript boundary checking, or to instruct the compiler to insert object code instead of a function call (as C/C++ does with inline functions). Generics See also Ada compilers APSE – a specification for a programming environment to support software development in Ada Ravenscar profile – a subset of the Ada tasking features designed for safety-critical hard real-time computing SPARK – a programming language consisting of a highly restricted subset of Ada, annotated with meta-information describing desired component behavior and individual runtime requirements References International standards ISO/IEC 8652: Information technology—Programming languages—Ada ISO/IEC 15291: Information technology—Programming languages—Ada Semantic Interface Specification (ASIS) ISO/IEC 18009: Information technology—Programming languages—Ada: Conformity assessment of a language processor (ACATS) IEEE Standard 1003.5b-1996, the POSIX Ada binding Ada Language Mapping Specification, the CORBA interface description language (IDL) to Ada mapping Rationale These documents have been published in various forms, including print. Also available apps.dtic.mil, pdf Books 795 pages. Archives Ada Programming Language Materials, 1981–1990. Charles Babbage Institute, University of Minnesota. Includes literature on software products designed for the Ada language; U.S. government publications, including Ada 9X project reports, technical reports, working papers, newsletters; and user group information. External links Ada - C/C++ changer - MapuSoft DOD Ada programming language (ANSI/MIL STD 1815A-1983) specification JTC1/SC22/WG9 ISO home of Ada Standards Programming languages .NET programming languages Avionics programming languages High Integrity Programming Language Multi-paradigm programming languages Programming language standards Programming languages created in 1980 Programming languages with an ISO standard Statically typed programming languages Systems programming languages 1980 software High-level programming languages Ada Lovelace

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https://en.wikipedia.org/wiki/Arianism

Arianism

Arianism (, ) is a Christological doctrine first attributed to Arius (), a Christian presbyter who preached and studied in Alexandria, Egypt. Arian theology holds that Jesus Christ is the Son of God, who was begotten by God the Father with the difference that the Son of God did not always exist but was begotten/made before "time" by God the Father; therefore, Jesus was not coeternal with God the Father, but nonetheless Jesus began to exist outside time as time applies only to the creations of God. Arius' trinitarian theology, later given an extreme form by Aetius and his disciple Eunomius and called anomoean ("dissimilar"), asserts a total dissimilarity between the Son and the Father. Arianism holds that the Son is distinct from the Father and therefore subordinate to him. The term Arian is derived from the name Arius; it was not what the followers of Arius' teachings called themselves, but rather a term used by outsiders. The nature of Arius's teachings and his supporters were opposed to the theological doctrines held by Homoousian Christians, regarding the nature of the Trinity and the nature of Christ. There was a controversy between two interpretations of Jesus's divinity (Homoousianism and Arianism) based upon the theological orthodoxy of the time, one trinitarian and the other also a derivative of trinitarian orthodoxy, and both of them attempted to solve its respective theological dilemmas. Homoousianism was formally affirmed by the first two ecumenical councils; since then, Arianism has been condemned as "the heresy or sect of Arius". As such, all mainstream branches of Christianity now consider Arianism to be heterodox and heretical. Trinitarian (Homoousian) doctrines were vigorously upheld by Patriarch Athanasius of Alexandria, who insisted that Jesus (God the Son) was "same in being" or "same in essence" with God the Father. Arius stated: "If the Father begat the Son, then he who was begotten had a beginning in existence, and from this it follows there was a time when the Son was not." The ecumenical First Council of Nicaea of 325, convened by Emperor Constantine to ensure church unity, declared Arianism to be a heresy. According to Everett Ferguson, "The great majority of Christians had no clear views about the nature of the Trinity and they did not understand what was at stake in the issues that surrounded it." Arianism is also used to refer to other nontrinitarian theological systems of the 4th century, which regarded Jesus Christ—the Son of God, the Logos—as either a begotten creature of a similar or different substance to that of the Father, but not identical (as Homoiousian and Anomoeanism) or as neither uncreated nor created in the sense other beings are created (as in semi-Arianism). Origin Some early Christians that were counted among Orthodoxy denied the eternal generation of the Son, seeing the Son as being begotten in time. These include Tertullian and Justin Martyr. Tertullian is considered a pre-Arian. Among the other church fathers, Origen was accused of Arianism for using terms like "second God", and Patriarch Dionysius of Alexandria was denounced at Rome for saying that Son is a work and creature of God. However, the Subordinationism of Origen is not identical to Arianism, and it has been generally viewed as closer to the Nicene-Constantinopolitan view. Controversy over Arianism arose in the late 3rd century and persisted throughout most of the 4th century. It involved most church members—from simple believers, priests, and monks to bishops, emperors, and members of Rome's imperial family. Two Roman emperors, Constantius II and Valens, became Arians or Semi-Arians, as did prominent Gothic, Vandal, and Lombard warlords both before and after the fall of the Western Roman Empire. The antipopes Felix II and Ursinus were Arian, and Pope Liberius was forced to sign the Arian Creed of Sirmium of 357 although the letter says he willingly agreed with Arianism. Such a deep controversy within the early Church during this period of its development could not have materialized without significant historical influences providing a basis for the Arian doctrines. Arius had been a pupil of Lucian of Antioch at Lucian's private academy in Antioch and inherited from him a modified form of the teachings of Paul of Samosata. Arius taught that God the Father and the Son of God did not always exist together eternally. Condemnation by the Council of Nicaea Emperor Constantine the Great summoned the First Council of Nicaea, which defined the dogmatic fundaments of Christianity; these definitions served to rebut the questions posed by Arians. All the bishops who were there were in agreement with the major theological points of the proto-orthodoxy, since at that time all other forms of Christianity "had by this time already been displaced, suppressed, reformed, or destroyed". Although the proto-orthodox won the previous disputes, due to the more accurate defining of orthodoxy, they were vanquished with their own weapons, ultimately being declared heretics, not because they would have fought against ideas regarded as theologically correct, but because their positions lacked the accuracy and refinement needed by the fusion of several contradictory theses accepted at the same time by later orthodox theologians. According to Bart Ehrman that is why the Trinity is a "paradoxical affirmation". Of the roughly 300 bishops in attendance at the Council of Nicaea, two bishops did not sign the Nicene Creed that condemned Arianism. Constantine the Great also ordered a penalty of death for those who refused to surrender the Arian writings: Ten years after the Council of Nicaea, Constantine the Great, who was himself later baptized by the Arian bishop Eusebius of Nicomedia in 337 AD, convened another gathering of church leaders at the regional First Synod of Tyre in 335 (attended by 310 bishops), to address various charges mounted against Athanasius by his detractors, such as "murder, illegal taxation, sorcery, and treason", following his refusal to readmit Arius into fellowship. Athanasius was exiled to Trier (in modern Germany) following his conviction at Tyre of conspiracy, and Arius was, effectively, exonerated. Athanasius eventually returned to Alexandria in 346, after the deaths of both Arius and Constantine. Though Arianism had spread, Athanasius and other Nicene Christian church leaders crusaded against Arian theology, and Arius was anathemised and condemned as a heretic once more at the ecumenical First Council of Constantinople of 381 (attended by 150 bishops). The Roman Emperors Constantius II (337–361) and Valens (364–378) were Arians or Semi-Arians, as was the first King of Italy, Odoacer (433?–493), and the Lombards were also Arians or Semi-Arians until the 7th century. The ruling elite of Visigothic Spain was Arian until 589. Many Goths adopted Arian beliefs upon their conversion to Christianity. The Vandals actively spread Arianism in North Africa. Beliefs Little of Arius's own work survives except in quotations selected for polemical purposes by his opponents, and there is no certainty about what theological and philosophical traditions formed his thought. The influence from the One of Neo-Platonism was widespread throughout the Eastern Roman Empire and this influenced Arius. Arius's basic premise is that only God is independent for his existence. Since the Son is dependent he must therefore be called a creature. Arians put forward a question for their belief: "has God birthed Jesus willingly or unwillingly?" This question was used to argue that Jesus is dependent for his existence since Jesus exists only because God wants him to be. Arianism taught that the Logos was a divine being begotten by God the Father before the creation of the world, made him a medium through whom everything else was created, and that the Son of God is subordinate to God the Father. The Logos is an inner attribute of God that is wisdom, while Jesus is called Logos only because of resemblance with the inner Logos of God. A verse from Proverbs was used for the creation of the Son: "The Lord created me at the beginning of his work." Therefore, the Son was rather the very first and the most perfect of God's creatures, and he was called "God" only by the Father's permission and power. The definition of "Son" is ambiguous as Arians have applied an adoptionist theology to defend the creation ex nihilo of Jesus from God. Arians do not believe in the traditional doctrine of the Trinity. The letter of the Arian bishop Auxentius of Durostorum regarding the Arian missionary Ulfilas gives a picture of Arian beliefs. The Arian Ulfilas, who was ordained a bishop by the Arian bishop Eusebius of Nicomedia and returned to his people to work as a missionary, believed: God, the Father, ("unbegotten" God; Almighty God) always existing and who is the only true God. The Son of God, Jesus Christ, ("only-begotten god"), was begotten before time began. The Holy Spirit is the illuminating and sanctifying power of God. 1 Corinthians 8:5–6 was cited as proof text: The creed of Arian Ulfilas (c. 311–383), which concludes the above-mentioned letter by Auxentius, distinguishes God the Father ("unbegotten"), who is the only true God, from the Son of God ("only-begotten"); and the Holy Spirit, the illuminating and sanctifying power, which is neither God the Father nor the Lord Jesus Christ: A letter from Arius (c. 250–336) to the Arian Eusebius of Nicomedia (died 341) states the core beliefs of the Arians: Principally, the dispute between Trinitarianism and Arianism was about: has the Son always existed eternally with the Father or was the Son begotten at a certain time in the past? is the Son equal to the Father or subordinate to the Father? For Constantine, these were minor theological points that stood in the way of uniting the Empire, but for the theologians, it was of huge importance; for them, it was a matter of salvation. For the theologians of the 19th century it was already obvious that in fact Arius and Alexander/Athanasius did not have much to quarrel about, the difference between their views was very small, and that the end of the fight was by no means clear during their quarrel, both Arius and Athanasius suffering a great deal for their own views. Arius was the father of Homoiousianism and Alexander the father of Homoousianism, which was championed by Athanasius. For those theologians it was clear that Arius, Alexander and Athanasius were far from a true doctrine of Trinity, which developed later, historically speaking. Guido M. Berndt and Roland Steinacher state clearly that the beliefs of Arius were acceptable ("not especially unusual") to a huge number of orthodox clergy; this is the reason why such a major conflict was able to develop inside the Church, since Arius's theology received widespread sympathy (or at least was not considered to be overly controversial) and could not be dismissed outright as individual heresy. Homoian Arianism Arianism had several different variants, including Eunomianism and Homoian Arianism. Homoian Arianism is associated with Acacius and Eudoxius. Homoian Arianism avoided the use of the word ousia to describe the relation of Father to Son, and described these as "like" each other. Hanson lists twelve creeds that reflect the Homoian faith: The Second Sirmian Creed of 357 The Creed of Nice (Constantinople) 360 The creed put forward by Acacius at Seleucia, 359 The Rule of Faith of Ulfilas The creed uttered by Ulfilas on his deathbed, 383 The creed attributed to Eudoxius The Creed of Auxentius of Milan, 364 The Creed of Germinius professed in correspondence with Ursacius of Singidunum and Valens of Mursa Palladius's rule of faith Three credal statements found in fragments, subordinating the Son to the Father Struggles with orthodoxy First Council of Nicaea In 321, Arius was denounced by a synod at Alexandria for teaching a heterodox view of the relationship of Jesus to God the Father. Because Arius and his followers had great influence in the schools of Alexandria—counterparts to modern universities or seminaries—their theological views spread, especially in the eastern Mediterranean. By 325, the controversy had become significant enough that the Emperor Constantine called an assembly of bishops, the First Council of Nicaea, which condemned Arius's doctrine and formulated the original Nicene Creed of 325. The Nicene Creed's central term, used to describe the relationship between the Father and the Son, is Homoousios (), or Consubstantiality, meaning "of the same substance" or "of one being" (the Athanasian Creed is less often used but is a more overtly anti-Arian statement on the Trinity). The focus of the Council of Nicaea was the nature of the Son of God and his precise relationship to God the Father (see Paul of Samosata and the Synods of Antioch). Arius taught that Jesus Christ was divine/holy and was sent to earth for the salvation of mankind but that Jesus Christ was not equal to God the Father (infinite, primordial origin) in rank and that God the Father and the Son of God were not equal to the Holy Spirit. Under Arianism, Christ was instead not consubstantial with God the Father since both the Father and the Son under Arius were made of "like" essence or being (see homoiousia) but not of the same essence or being (see homoousia). In the Arian view, God the Father is a deity and is divine and the Son of God is not a deity but divine (I, the LORD, am Deity alone.) God the Father sent Jesus to earth for salvation of mankind. Ousia is essence or being, in Eastern Christianity, and is the aspect of God that is completely incomprehensible to mankind and human perception. It is all that subsists by itself and which has not its being in another, God the Father and God the Son and God the Holy Spirit all being uncreated. According to the teaching of Arius, the preexistent Logos and thus the incarnate Jesus Christ was a begotten being; only the Son was directly begotten by God the Father, before ages, but was of a distinct, though similar, essence or substance from the Creator. His opponents argued that this would make Jesus less than God and that this was heretical. Much of the distinction between the differing factions was over the phrasing that Christ expressed in the New Testament to express submission to God the Father. The theological term for this submission is kenosis. This ecumenical council declared that Jesus Christ was true God, co-eternal and consubstantial (i.e., of the same substance) with God the Father. Constantine is believed to have exiled those who refused to accept the Nicaean Creed—Arius himself, the deacon Euzoios, and the Libyan bishops Theonas of Marmarica and Secundus of Ptolemais—and also the bishops who signed the creed but refused to join in condemnation of Arius, Eusebius of Nicomedia and Theognis of Nicaea. The emperor also ordered all copies of the Thalia, the book in which Arius had expressed his teachings, to be burned. However, there is no evidence that his son and ultimate successor, Constantius II, who was a Semi-Arian Christian, was exiled. Although he was committed to maintaining what the Great Church had defined at Nicaea, Constantine was also bent on pacifying the situation and eventually became more lenient toward those condemned and exiled at the council. First, he allowed Eusebius of Nicomedia, who was a protégé of his sister, and Theognis to return once they had signed an ambiguous statement of faith. The two, and other friends of Arius, worked for Arius's rehabilitation. At the First Synod of Tyre in AD 335, they brought accusations against Athanasius, now bishop of Alexandria, the primary opponent of Arius. After this, Constantine had Athanasius banished since he considered him an impediment to reconciliation. In the same year, the Synod of Jerusalem under Constantine's direction readmitted Arius to communion in 336. Arius died on the way to this event in Constantinople. Some scholars suggest that Arius may have been poisoned by his opponents. Eusebius and Theognis remained in the Emperor's favor, and when Constantine, who had been a catechumen much of his adult life, accepted baptism on his deathbed, it was from Eusebius of Nicomedia. Aftermath of Nicaea The First Council of Nicaea did not end the controversy, as many bishops of the Eastern provinces disputed the homoousios, the central term of the Nicene Creed, as it had been used by Paul of Samosata, who had advocated a monarchianist Christology. Both the man and his teaching, including the term homoousios, had been condemned by the Synods of Antioch in 269. Hence, after Constantine's death in 337, open dispute resumed again. Constantine's son Constantius II, who had become emperor of the eastern part of the Roman Empire, actually encouraged the Arians and set out to reverse the Nicene Creed. His advisor in these affairs was Eusebius of Nicomedia, who had already at the Council of Nicaea been the head of the Arian party, who also was made the bishop of Constantinople. Constantius used his power to exile bishops adhering to the Nicene Creed, especially St Athanasius of Alexandria, who fled to Rome. In 355 Constantius became the sole Roman emperor and extended his pro-Arian policy toward the western provinces, frequently using force to push through his creed, even exiling Pope Liberius and installing Antipope Felix II. The Third Council of Sirmium in 357 was the high point of Arianism. The Seventh Arian Confession (Second Sirmium Confession) held that both homoousios (of one substance) and homoiousios (of similar substance) were unbiblical and that the Father is greater than the Son. (This confession was later known as the Blasphemy of Sirmium.) But since many persons are disturbed by questions concerning what is called in Latin substantia, but in Greek ousia, that is, to make it understood more exactly, as to 'coessential,' or what is called, 'like-in-essence,' there ought to be no mention of any of these at all, nor exposition of them in the Church, for this reason and for this consideration, that in divine Scripture nothing is written about them, and that they are above men's knowledge and above men's understanding; As debates raged in an attempt to come up with a new formula, three camps evolved among the opponents of the Nicene Creed. The first group mainly opposed the Nicene terminology and preferred the term homoiousios (alike in substance) to the Nicene homoousios, while they rejected Arius and his teaching and accepted the equality and co-eternality of the persons of the Trinity. Because of this centrist position, and despite their rejection of Arius, they were called "Semi-Arians" by their opponents. The second group also avoided invoking the name of Arius, but in large part followed Arius's teachings and, in another attempted compromise wording, described the Son as being like (homoios) the Father. A third group explicitly called upon Arius and described the Son as unlike (anhomoios) the Father. Constantius wavered in his support between the first and the second party, while harshly persecuting the third. Epiphanius of Salamis labeled the party of Basil of Ancyra in 358 "Semi-Arianism". This is considered unfair by Kelly who states that some members of the group were virtually orthodox from the start but disliked the adjective homoousios while others had moved in that direction after the out-and-out Arians had come into the open. The debates among these groups resulted in numerous synods, among them the Council of Serdica in 343, the Fourth Council of Sirmium in 358 and the double Council of Rimini and Seleucia in 359, and no fewer than fourteen further creed formulas between 340 and 360, leading the pagan observer Ammianus Marcellinus to comment sarcastically: "The highways were covered with galloping bishops." None of these attempts were acceptable to the defenders of Nicene orthodoxy; writing about the latter councils, Saint Jerome remarked that the world "awoke with a groan to find itself Arian." After Constantius's death in 361, his successor Julian, a devotee of Rome's pagan gods, declared that he would no longer attempt to favor one church faction over another, and allowed all exiled bishops to return; this resulted in further increasing dissension among Nicene Christians. The emperor Valens, however, revived Constantius's policy and supported the "Homoian" party, exiling bishops and often using force. During this persecution many bishops were exiled to the other ends of the Roman Empire (e.g., Saint Hilary of Poitiers to the eastern provinces). These contacts and the common plight subsequently led to a rapprochement between the western supporters of the Nicene Creed and the homoousios and the eastern Semi-Arians. Council of Constantinople It was not until the co-reigns of Gratian and Theodosius that Arianism was effectively wiped out among the ruling class and elite of the Eastern Empire. Valens died in the Battle of Adrianople in 378 and was succeeded by Theodosius I, who adhered to the Nicene Creed. This allowed for settling the dispute. Theodosius's wife St Flacilla was instrumental in his campaign to end Arianism. Two days after Theodosius arrived in Constantinople, 24 November 380, he expelled the Arian bishop, Demophilus of Constantinople, and surrendered the churches of that city to Gregory of Nazianzus, the Homoiousian leader of the rather small Nicene community there, an act which provoked rioting. Theodosius had just been baptized, by bishop Acholius of Thessalonica, during a severe illness, as was common in the early Christian world. In February he and Gratian had published an edict that all their subjects should profess the faith of the bishops of Rome and Alexandria (i.e., the Nicene faith), or be handed over for punishment for not doing so. Although much of the church hierarchy in the East had opposed the Nicene Creed in the decades leading up to Theodosius's accession, he managed to achieve unity on the basis of the Nicene Creed. In 381, at the Second Ecumenical Council in Constantinople, a group of mainly Eastern bishops assembled and accepted the Nicene Creed of 381, which was supplemented in regard to the Holy Spirit, as well as some other changes: see Comparison of Nicene Creeds of 325 and 381. This is generally considered the end of the dispute about the Trinity and the end of Arianism among the Roman, non-Germanic peoples. Among medieval Germanic tribes During the time of Arianism's flowering in Constantinople, the Gothic convert and Arian bishop Ulfilas (later the subject of the letter of Auxentius cited above) was sent as a missionary to the Gothic tribes across the Danube, a mission favored for political reasons by the Emperor Constantius II. The Homoians in the Danubian provinces played a major role in the conversion of the Goths to Arianism. Ulfilas's translation of the Bible into Gothic language and his initial success in converting the Goths to Arianism was strengthened by later events; the conversion of Goths led to a widespread diffusion of Arianism among other Germanic tribes as well (Vandals, Langobards, Svevi, and Burgundians). When the Germanic peoples entered the provinces of the Western Roman Empire and began founding their own kingdoms there, most of them were Arian Christians. The conflict in the 4th century had seen Arian and Nicene factions struggling for control of Western Europe. In contrast, among the Arian German kingdoms established in the collapsing Western Empire in the 5th century were entirely separate Arian and Nicene Churches with parallel hierarchies, each serving different sets of believers. The Germanic elites were Arians, and the Romance majority population was Nicene. The Arian Germanic tribes were generally tolerant towards Nicene Christians and other religious minorities, including the Jews. The apparent resurgence of Arianism after Nicaea was more an anti-Nicene reaction exploited by Arian sympathizers than a pro-Arian development. By the end of the 4th century it had surrendered its remaining ground to Trinitarianism. In Western Europe, Arianism, which had been taught by Ulfilas, the Arian missionary to the Germanic tribes, was dominant among the Goths, Langobards and Vandals. By the 8th century, it had ceased to be the tribes' mainstream belief as the tribal rulers gradually came to adopt Nicene orthodoxy. This trend began in 496 with Clovis I of the Franks, then Reccared I of the Visigoths in 587 and Aripert I of the Lombards in 653. The Franks and the Anglo-Saxons were unlike the other Germanic peoples in that they entered the Western Roman Empire as Pagans and were converted to Chalcedonian Christianity, led by their kings, Clovis I of the Franks, and Æthelberht of Kent and others in Britain (see also Christianity in Gaul and Christianisation of Anglo-Saxon England). The remaining tribes – the Vandals and the Ostrogoths – did not convert as a people nor did they maintain territorial cohesion. Having been militarily defeated by the armies of Emperor Justinian I, the remnants were dispersed to the fringes of the empire and became lost to history. The Vandalic War of 533–534 dispersed the defeated Vandals. Following their final defeat at the Battle of Mons Lactarius in 553, the Ostrogoths went back north and (re)settled in south Austria. From the 5th to the 7th century Much of south-eastern Europe and central Europe, including many of the Goths and Vandals respectively, had embraced Arianism (the Visigoths converted to Arian Christianity in 376 through their bishop Wulfila), which led to Arianism being a religious factor in various wars in the Roman Empire. In the west, organized Arianism survived in North Africa, in Hispania, and parts of Italy until it was finally suppressed in the 6th and 7th centuries. Visigothic Spain converted to Nicene Christianity through their king Reccared I at the Third Council of Toledo in 589. Grimoald, King of the Lombards (662–671), and his young son and successor Garibald (671), were the last Arian kings in Europe. From the 16th to the 19th century Following the Protestant Reformation from 1517, it did not take long for Arian and other nontrinitarian views to resurface. The first recorded English antitrinitarian was John Assheton, who was forced to recant before Thomas Cranmer in 1548. At the Anabaptist Council of Venice 1550, the early Italian instigators of the Radical Reformation committed to the views of Michael Servetus, who was burned alive by the orders of John Calvin in 1553, and these were promulgated by Giorgio Biandrata and others into Poland and Transylvania. The antitrinitarian wing of the Polish Reformation separated from the Calvinist ecclesia maior to form the ecclesia minor or Polish Brethren. These were commonly referred to as "Arians" due to their rejection of the Trinity, though in fact the Socinians, as they were later known, went further than Arius to the position of Photinus. The epithet "Arian" was also applied to the early Unitarians such as John Biddle, though in denial of the pre-existence of Christ they were again largely Socinians, not Arians. In 1683, when Anthony Ashley Cooper, 1st Earl of Shaftesbury, lay dying in Amsterdam—driven into exile by his outspoken opposition to King Charles II—he spoke to the minister Robert Ferguson, and professed himself an Arian. In the 18th century the "dominant trend" in Britain, particularly in Latitudinarianism, was towards Arianism, with which the names of Samuel Clarke, Benjamin Hoadly, William Whiston and Isaac Newton are associated. To quote the Encyclopædia Britannica article on Arianism: "In modern times some Unitarians are virtually Arians in that they are unwilling either to reduce Christ to a mere human being or to attribute to him a divine nature identical with that of the Father." A similar view was held by the ancient anti-Nicene Pneumatomachi (Greek: , "breath" or "spirit" and "fighters", combining as "fighters against the spirit"), so called because they opposed the deifying of the Nicene Holy Ghost. Although the Pneumatomachi's beliefs were somewhat reminiscent of Arianism, they were a distinct group. Today Many American Evangelicals agree that Jesus is not eternal but is the greatest creature made by God. The percentage of Evangelicals that agree with this statement range between 44% and 68%. The teachings of the first two ecumenical councils—which entirely reject Arianism—are held by the Catholic Church, the Eastern Orthodox Church, the Oriental Orthodox Churches, the Assyrian Church of the East and almost all historic Protestant churches including Lutheran, Reformed (Presbyterian, Continental Reformed, and Congregationalist), Anglican, Methodist, Baptist, and Free Evangelical entirely reject the teachings associated with Arianism. Modern groups which currently appear to embrace some of the principles of Arianism include Unitarians and Jehovah's Witnesses. Although the origins of their beliefs are not necessarily attributed to the teachings of Arius, many of the core beliefs of Unitarians and Jehovah's Witnesses are very similar to them. Jehovah's Witnesses Jehovah's Witnesses are often referred to as "modern-day Arians," usually by their opponents, although Jehovah's Witnesses themselves have denied these claims. Significant similarities in doctrine include the identification of the Father as the only true God and of Jesus Christ as the first creation of God and the intermediate agent in the creation of all other things. Jehovah's Witnesses differ from Arians by stating that the Son can fully know the Father (something which Arius himself denied). They also deny the personhood of the Holy Spirit, which some Arians historically affirmed. Jehovah's Witnesses exclusively worship and pray to God the Father, or Jehovah, only through Jesus the son as a mediator. Iglesia ni Cristo While Iglesia ni Cristo's christology has parallels with Arianism in that it affirms that the Father is the only true God, it denies the preexistence of Christ. Thus, Iglesia ni Cristo is Socinian rather than Arian in its Christology. Other Socinian groups Other Biblical Unitarians such as the Christadelphians and Church of God General Conference are also typically Socinian rather than Arian in their Christology. The Church of Jesus Christ of Latter-day Saints The Church of Jesus Christ of Latter-day Saints (LDS Church) teaches a nontrinitarian theology concerning the nature of the Godhead. Similarities between LDS doctrines and Arianism were alleged as early as 1846. However, there are a number of key differences between Arianism and Latter-day Saint theology. Whereas Arianism is a unitarian Christian form of classical theism, Latter-day Saint theology is a non-trinitarian (but not unitarian) form of Christianity outside of classical theism. Whereas Arianism teaches that God is eternal, was never a man, and could not incarnate as a man, the LDS Church teaches that "God Himself is an exalted man, perfected, enthroned, and supreme." Whereas Arianism denies that humans can become gods, the LDS Church affirms that humans can become gods through exaltation. Whereas Arianism teaches that the Son was created, the LDS Church teaches that he was procreated as a literal spirit child of the Heavenly Father and the Heavenly Mother. Whereas the creation of Christ ex nihilo is a fundamental premise of Arianism, the LDS Church denies any form of creation ex nihilo. Whereas Arianism teaches that God is incorporeal, the LDS Church teaches that God has a body of flesh of bones: "The Father has a body of flesh and bones as tangible as man's; the Son also; but the Holy Ghost has not a body of flesh and bones, but is a personage of Spirit. Were it not so, the Holy Ghost could not dwell in us." Whereas Arianism traditionally taught that God is incomprehensible even to the Son, the LDS Church rejects the doctrine that God is incomprehensible. Whereas Arianism teaches that Christ is ontologically inferior and subordinate to the Father, the LDS Church teaches that Christ is equal in power and glory with the Father. The two should therefore be carefully distinguished; they are more similar in what they deny than in what they affirm. The LDS Church teaches that the Father, Son, and Holy Spirit are three separate beings united in purpose: "the Father, the Son and the Holy Spirit (or Holy Ghost)... are three physically separate beings, but fully one in love, purpose and will", as illustrated in Jesus' Farewell Prayer, his baptism at the hands of John, his transfiguration, and the martyrdom of Stephen. Thus, the church's first Article of Faith states: "We believe in God, the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost." Latter-day Saints believe that the three are collectively "one eternal God" but reject the Nicene definition of the Trinity (that the three are consubstantial). In some respects, Latter-day Saint theology is more similar to Social Trinitarianism than to Arianism. See also References Notes Citations Sources Further reading External links Documents of the Early Arian Controversy Chronological survey of the sources English translations of all extant letters relating to early Arianism A map of early sympathizers with Arius Jewish Encyclopedia: Arianism Concordia Cyclopedia: Arianism (page 1) (page 2) (page 3) The Arians of the fourth century by John Henry "Cardinal" Newman in "btm" format Concise Summary of the Arian Controversy Arianism Today Christian terminology Nontrinitarian denominations Christian theological movements Christian denominations established in the 3rd century Nature of Jesus Christ

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https://en.wikipedia.org/wiki/Advanced%20Encryption%20Standard

Advanced Encryption Standard

The Advanced Encryption Standard (AES), also known by its original name Rijndael (), is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001. AES is a variant of the Rijndael block cipher developed by two Belgian cryptographers, Joan Daemen and Vincent Rijmen, who submitted a proposal to NIST during the AES selection process. Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits. AES has been adopted by the U.S. government. It supersedes the Data Encryption Standard (DES), which was published in 1977. The algorithm described by AES is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data. In the United States, AES was announced by the NIST as U.S. FIPS PUB 197 (FIPS 197) on November 26, 2001. This announcement followed a five-year standardization process in which fifteen competing designs were presented and evaluated, before the Rijndael cipher was selected as the most suitable. AES is included in the ISO/IEC 18033-3 standard. AES became effective as a U.S. federal government standard on May 26, 2002, after approval by U.S. Secretary of Commerce Donald Evans. AES is available in many different encryption packages, and is the first (and only) publicly accessible cipher approved by the U.S. National Security Agency (NSA) for top secret information when used in an NSA approved cryptographic module. Definitive standards The Advanced Encryption Standard (AES) is defined in each of: FIPS PUB 197: Advanced Encryption Standard (AES) ISO/IEC 18033-3: Block ciphers Description of the ciphers AES is based on a design principle known as a substitution–permutation network, and is efficient in both software and hardware. Unlike its predecessor DES, AES does not use a Feistel network. AES is a variant of Rijndael, with a fixed block size of 128 bits, and a key size of 128, 192, or 256 bits. By contrast, Rijndael per se is specified with block and key sizes that may be any multiple of 32 bits, with a minimum of 128 and a maximum of 256 bits. Most AES calculations are done in a particular finite field. AES operates on a 4 × 4 column-major order array of 16 bytes termed the state: The key size used for an AES cipher specifies the number of transformation rounds that convert the input, called the plaintext, into the final output, called the ciphertext. The number of rounds are as follows: 10 rounds for 128-bit keys. 12 rounds for 192-bit keys. 14 rounds for 256-bit keys. Each round consists of several processing steps, including one that depends on the encryption key itself. A set of reverse rounds are applied to transform ciphertext back into the original plaintext using the same encryption key. High-level description of the algorithm round keys are derived from the cipher key using the AES key schedule. AES requires a separate 128-bit round key block for each round plus one more. Initial round key addition: each byte of the state is combined with a byte of the round key using bitwise xor. 9, 11 or 13 rounds: a non-linear substitution step where each byte is replaced with another according to a lookup table. a transposition step where the last three rows of the state are shifted cyclically a certain number of steps. a linear mixing operation which operates on the columns of the state, combining the four bytes in each column. Final round (making 10, 12 or 14 rounds in total): The step In the step, each byte in the state array is replaced with a using an 8-bit substitution box. Note that before round 0, the state array is simply the plaintext/input. This operation provides the non-linearity in the cipher. The S-box used is derived from the multiplicative inverse over , known to have good non-linearity properties. To avoid attacks based on simple algebraic properties, the S-box is constructed by combining the inverse function with an invertible affine transformation. The S-box is also chosen to avoid any fixed points (and so is a derangement), i.e., , and also any opposite fixed points, i.e., . While performing the decryption, the step (the inverse of ) is used, which requires first taking the inverse of the affine transformation and then finding the multiplicative inverse. The step The step operates on the rows of the state; it cyclically shifts the bytes in each row by a certain offset. For AES, the first row is left unchanged. Each byte of the second row is shifted one to the left. Similarly, the third and fourth rows are shifted by offsets of two and three respectively. In this way, each column of the output state of the step is composed of bytes from each column of the input state. The importance of this step is to avoid the columns being encrypted independently, in which case AES would degenerate into four independent block ciphers. The step In the step, the four bytes of each column of the state are combined using an invertible linear transformation. The function takes four bytes as input and outputs four bytes, where each input byte affects all four output bytes. Together with , provides diffusion in the cipher. During this operation, each column is transformed using a fixed matrix (matrix left-multiplied by column gives new value of column in the state): Matrix multiplication is composed of multiplication and addition of the entries. Entries are bytes treated as coefficients of polynomial of order . Addition is simply XOR. Multiplication is modulo irreducible polynomial . If processed bit by bit, then, after shifting, a conditional XOR with 1B16 should be performed if the shifted value is larger than FF16 (overflow must be corrected by subtraction of generating polynomial). These are special cases of the usual multiplication in . In more general sense, each column is treated as a polynomial over and is then multiplied modulo with a fixed polynomial . The coefficients are displayed in their hexadecimal equivalent of the binary representation of bit polynomials from . The step can also be viewed as a multiplication by the shown particular MDS matrix in the finite field . This process is described further in the article Rijndael MixColumns. The In the step, the subkey is combined with the state. For each round, a subkey is derived from the main key using Rijndael's key schedule; each subkey is the same size as the state. The subkey is added by combining of the state with the corresponding byte of the subkey using bitwise XOR. Optimization of the cipher On systems with 32-bit or larger words, it is possible to speed up execution of this cipher by combining the and steps with the step by transforming them into a sequence of table lookups. This requires four 256-entry 32-bit tables (together occupying 4096 bytes). A round can then be performed with 16 table lookup operations and 12 32-bit exclusive-or operations, followed by four 32-bit exclusive-or operations in the step. Alternatively, the table lookup operation can be performed with a single 256-entry 32-bit table (occupying 1024 bytes) followed by circular rotation operations. Using a byte-oriented approach, it is possible to combine the , , and steps into a single round operation. Security The National Security Agency (NSA) reviewed all the AES finalists, including Rijndael, and stated that all of them were secure enough for U.S. Government non-classified data. In June 2003, the U.S. Government announced that AES could be used to protect classified information: The design and strength of all key lengths of the AES algorithm (i.e., 128, 192 and 256) are sufficient to protect classified information up to the SECRET level. TOP SECRET information will require use of either the 192 or 256 key lengths. The implementation of AES in products intended to protect national security systems and/or information must be reviewed and certified by NSA prior to their acquisition and use. AES has 10 rounds for 128-bit keys, 12 rounds for 192-bit keys, and 14 rounds for 256-bit keys. By 2006, the best known attacks were on 7 rounds for 128-bit keys, 8 rounds for 192-bit keys, and 9 rounds for 256-bit keys. Known attacks For cryptographers, a cryptographic "break" is anything faster than a brute-force attack – i.e., performing one trial decryption for each possible key in sequence. A break can thus include results that are infeasible with current technology. Despite being impractical, theoretical breaks can sometimes provide insight into vulnerability patterns. The largest successful publicly known brute-force attack against a widely implemented block-cipher encryption algorithm was against a 64-bit RC5 key by distributed.net in 2006. The key space increases by a factor of 2 for each additional bit of key length, and if every possible value of the key is equiprobable, this translates into a doubling of the average brute-force key search time. This implies that the effort of a brute-force search increases exponentially with key length. Key length in itself does not imply security against attacks, since there are ciphers with very long keys that have been found to be vulnerable. AES has a fairly simple algebraic framework. In 2002, a theoretical attack, named the "XSL attack", was announced by Nicolas Courtois and Josef Pieprzyk, purporting to show a weakness in the AES algorithm, partially due to the low complexity of its nonlinear components. Since then, other papers have shown that the attack, as originally presented, is unworkable; see XSL attack on block ciphers. During the AES selection process, developers of competing algorithms wrote of Rijndael's algorithm "we are concerned about [its] use ... in security-critical applications." In October 2000, however, at the end of the AES selection process, Bruce Schneier, a developer of the competing algorithm Twofish, wrote that while he thought successful academic attacks on Rijndael would be developed someday, he "did not believe that anyone will ever discover an attack that will allow someone to read Rijndael traffic." Until May 2009, the only successful published attacks against the full AES were side-channel attacks on some specific implementations. In 2009, a new related-key attack was discovered that exploits the simplicity of AES's key schedule and has a complexity of 2119. In December 2009 it was improved to 299.5. This is a follow-up to an attack discovered earlier in 2009 by Alex Biryukov, Dmitry Khovratovich, and Ivica Nikolić, with a complexity of 296 for one out of every 235 keys. However, related-key attacks are not of concern in any properly designed cryptographic protocol, as a properly designed protocol (i.e., implementational software) will take care not to allow related keys, essentially by constraining an attacker's means of selecting keys for relatedness. Another attack was blogged by Bruce Schneier on July 30, 2009, and released as a preprint on August 3, 2009. This new attack, by Alex Biryukov, Orr Dunkelman, Nathan Keller, Dmitry Khovratovich, and Adi Shamir, is against AES-256 that uses only two related keys and 239 time to recover the complete 256-bit key of a 9-round version, or 245 time for a 10-round version with a stronger type of related subkey attack, or 270 time for an 11-round version. 256-bit AES uses 14 rounds, so these attacks are not effective against full AES. The practicality of these attacks with stronger related keys has been criticized, for instance, by the paper on chosen-key-relations-in-the-middle attacks on AES-128 authored by Vincent Rijmen in 2010. In November 2009, the first known-key distinguishing attack against a reduced 8-round version of AES-128 was released as a preprint. This known-key distinguishing attack is an improvement of the rebound, or the start-from-the-middle attack, against AES-like permutations, which view two consecutive rounds of permutation as the application of a so-called Super-S-box. It works on the 8-round version of AES-128, with a time complexity of 248, and a memory complexity of 232. 128-bit AES uses 10 rounds, so this attack is not effective against full AES-128. The first key-recovery attacks on full AES were by Andrey Bogdanov, Dmitry Khovratovich, and Christian Rechberger, and were published in 2011. The attack is a biclique attack and is faster than brute force by a factor of about four. It requires 2126.2 operations to recover an AES-128 key. For AES-192 and AES-256, 2190.2 and 2254.6 operations are needed, respectively. This result has been further improved to 2126.0 for AES-128, 2189.9 for AES-192 and 2254.3 for AES-256, which are the current best results in key recovery attack against AES. This is a very small gain, as a 126-bit key (instead of 128-bits) would still take billions of years to brute force on current and foreseeable hardware. Also, the authors calculate the best attack using their technique on AES with a 128-bit key requires storing 288 bits of data. That works out to about 38 trillion terabytes of data, which is more than all the data stored on all the computers on the planet in 2016. As such, there are no practical implications on AES security. The space complexity has later been improved to 256 bits, which is 9007 terabytes (while still keeping a time complexity of 2126.2). According to the Snowden documents, the NSA is doing research on whether a cryptographic attack based on tau statistic may help to break AES. At present, there is no known practical attack that would allow someone without knowledge of the key to read data encrypted by AES when correctly implemented. Side-channel attacks Side-channel attacks do not attack the cipher as a black box, and thus are not related to cipher security as defined in the classical context, but are important in practice. They attack implementations of the cipher on hardware or software systems that inadvertently leak data. There are several such known attacks on various implementations of AES. In April 2005, D. J. Bernstein announced a cache-timing attack that he used to break a custom server that used OpenSSL's AES encryption. The attack required over 200 million chosen plaintexts. The custom server was designed to give out as much timing information as possible (the server reports back the number of machine cycles taken by the encryption operation). However, as Bernstein pointed out, "reducing the precision of the server's timestamps, or eliminating them from the server's responses, does not stop the attack: the client simply uses round-trip timings based on its local clock, and compensates for the increased noise by averaging over a larger number of samples." In October 2005, Dag Arne Osvik, Adi Shamir and Eran Tromer presented a paper demonstrating several cache-timing attacks against the implementations in AES found in OpenSSL and Linux's dm-crypt partition encryption function. One attack was able to obtain an entire AES key after only 800 operations triggering encryptions, in a total of 65 milliseconds. This attack requires the attacker to be able to run programs on the same system or platform that is performing AES. In December 2009 an attack on some hardware implementations was published that used differential fault analysis and allows recovery of a key with a complexity of 232. In November 2010 Endre Bangerter, David Gullasch and Stephan Krenn published a paper which described a practical approach to a "near real time" recovery of secret keys from AES-128 without the need for either cipher text or plaintext. The approach also works on AES-128 implementations that use compression tables, such as OpenSSL. Like some earlier attacks, this one requires the ability to run unprivileged code on the system performing the AES encryption, which may be achieved by malware infection far more easily than commandeering the root account. In March 2016, Ashokkumar C., Ravi Prakash Giri and Bernard Menezes presented a side-channel attack on AES implementations that can recover the complete 128-bit AES key in just 6–7 blocks of plaintext/ciphertext, which is a substantial improvement over previous works that require between 100 and a million encryptions. The proposed attack requires standard user privilege and key-retrieval algorithms run under a minute. Many modern CPUs have built-in hardware instructions for AES, which protect against timing-related side-channel attacks. Quantum attacks AES-256 is considered to be quantum resistant, as it has similar quantum resistance to AES-128's resistance against traditional, non-quantum, attacks. Whilst AES-192 and AES-128 are not considered quantum resistant due to their smaller key sizes. AES-192 has a strength of 96-bits against quantum attacks and AES-128 has 64-bits of strength against quantum attacks, making them both insecure. NIST/CSEC validation The Cryptographic Module Validation Program (CMVP) is operated jointly by the United States Government's National Institute of Standards and Technology (NIST) Computer Security Division and the Communications Security Establishment (CSE) of the Government of Canada. The use of cryptographic modules validated to NIST FIPS 140-2 is required by the United States Government for encryption of all data that has a classification of Sensitive but Unclassified (SBU) or above. From NSTISSP #11, National Policy Governing the Acquisition of Information Assurance: “Encryption products for protecting classified information will be certified by NSA, and encryption products intended for protecting sensitive information will be certified in accordance with NIST FIPS 140-2.” The Government of Canada also recommends the use of FIPS 140 validated cryptographic modules in unclassified applications of its departments. Although NIST publication 197 (“FIPS 197”) is the unique document that covers the AES algorithm, vendors typically approach the CMVP under FIPS 140 and ask to have several algorithms (such as Triple DES or SHA1) validated at the same time. Therefore, it is rare to find cryptographic modules that are uniquely FIPS 197 validated and NIST itself does not generally take the time to list FIPS 197 validated modules separately on its public web site. Instead, FIPS 197 validation is typically just listed as an "FIPS approved: AES" notation (with a specific FIPS 197 certificate number) in the current list of FIPS 140 validated cryptographic modules. The Cryptographic Algorithm Validation Program (CAVP) allows for independent validation of the correct implementation of the AES algorithm. Successful validation results in being listed on the NIST validations page. This testing is a pre-requisite for the FIPS 140-2 module validation. However, successful CAVP validation in no way implies that the cryptographic module implementing the algorithm is secure. A cryptographic module lacking FIPS 140-2 validation or specific approval by the NSA is not deemed secure by the US Government and cannot be used to protect government data. FIPS 140-2 validation is challenging to achieve both technically and fiscally. There is a standardized battery of tests as well as an element of source code review that must be passed over a period of a few weeks. The cost to perform these tests through an approved laboratory can be significant (e.g., well over $30,000 US) and does not include the time it takes to write, test, document and prepare a module for validation. After validation, modules must be re-submitted and re-evaluated if they are changed in any way. This can vary from simple paperwork updates if the security functionality did not change to a more substantial set of re-testing if the security functionality was impacted by the change. Test vectors Test vectors are a set of known ciphers for a given input and key. NIST distributes the reference of AES test vectors as AES Known Answer Test (KAT) Vectors. Performance High speed and low RAM requirements were some of the criteria of the AES selection process. As the chosen algorithm, AES performed well on a wide variety of hardware, from 8-bit smart cards to high-performance computers. On a Pentium Pro, AES encryption requires 18 clock cycles per byte, equivalent to a throughput of about 11 MiB/s for a 200 MHz processor. On Intel Core and AMD Ryzen CPUs supporting AES-NI instruction set extensions, throughput can be multiple GiB/s (even over 15 GiB/s on an i7-12700k). Implementations See also AES modes of operation Disk encryption Encryption Whirlpool – hash function created by Vincent Rijmen and Paulo S. L. M. Barreto List of free and open-source software packages Notes References alternate link (companion web site contains online lectures on AES) External links AES algorithm archive information – (old, unmaintained) Animation of Rijndael – AES deeply explained and animated using Flash (by Enrique Zabala / University ORT / Montevideo / Uruguay). This animation (in English, Spanish, and German) is also part of CrypTool 1 (menu Indiv. Procedures → Visualization of Algorithms → AES). HTML5 Animation of Rijndael – Same Animation as above made in HTML5. Advanced Encryption Standard Cryptography

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https://en.wikipedia.org/wiki/April%2026

April 26

Events Pre-1600 1336 – Francesco Petrarca (Petrarch) ascends Mont Ventoux. 1478 – The Pazzi family attack on Lorenzo de' Medici in order to displace the ruiling Medici family kills his brother Giuliano during High Mass in Florence Cathedral. 1564 – Playwright William Shakespeare is baptized in Stratford-upon-Avon, Warwickshire, England (date of birth is unknown). 1601–1900 1607 – The Virginia Company colonists make landfall at Cape Henry. 1721 – A massive earthquake devastates the Iranian city of Tabriz. 1777 – Sybil Ludington, aged 16, allegedly rode to alert American colonial forces to the approach of the British regular forces 1794 – Battle of Beaumont during the Flanders Campaign of the War of the First Coalition. 1802 – Napoleon Bonaparte signs a general amnesty to allow all but about one thousand of the most notorious émigrés of the French Revolution to return to France. 1803 – Thousands of meteor fragments fall from the skies of L'Aigle, France; the event convinces European scientists that meteors exist. 1805 – First Barbary War: United States Marines captured Derne under the command of First Lieutenant Presley O'Bannon. 1865 – Union cavalry troopers corner and shoot dead John Wilkes Booth, assassin of President Abraham Lincoln, in Virginia. 1900 – Fires destroy Canadian cities Ottawa and Hull, reducing them to ashes in 12 hours. Twelve thousand people are left without a home. 1901–present 1903 – Atlético Madrid Association football club is founded 1915 – World War I: Italy secretly signs the Treaty of London pledging to join the Allied Powers. 1916 – Easter Rising: Battle of Mount Street Bridge 1920 – Ice hockey makes its Olympic debut at the Antwerp Games with center Frank Fredrickson scoring seven goals in Canada's 12–1 drubbing of Sweden in the gold medal match. 1923 – The Duke of York weds Lady Elizabeth Bowes-Lyon at Westminster Abbey. 1925 – Paul von Hindenburg defeats Wilhelm Marx in the second round of the German presidential election to become the first directly elected head of state of the Weimar Republic. 1933 – The Gestapo, the official secret police force of Nazi Germany, is established by Hermann Göring. 1937 – Spanish Civil War: Guernica, Spain, is bombed by German Luftwaffe. 1942 – Benxihu Colliery accident in Manchukuo leaves 1549 Chinese miners dead. 1943 – The Easter Riots break out in Uppsala, Sweden. 1944 – Georgios Papandreou becomes head of the Greek government-in-exile based in Egypt. 1944 – Heinrich Kreipe is captured by Allied commandos in occupied Crete. 1945 – World War II: Battle of Bautzen: Last successful German tank-offensive of the war and last noteworthy victory of the Wehrmacht. 1945 – World War II: Filipino troops of the 66th Infantry Regiment, Philippine Commonwealth Army, USAFIP-NL and the American troops of the 33rd and 37th Infantry Division, United States Army liberate Baguio as they fight against the Japanese forces under General Tomoyuki Yamashita. 1954 – The Geneva Conference, an effort to restore peace in Indochina and Korea, begins. 1954 – The first clinical trials of Jonas Salk's polio vaccine begin in Fairfax County, Virginia. 1956 – , the world's first successful container ship, leaves Port Newark, New Jersey, for Houston, Texas. 1958 – Final run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City after 68 years, the first U.S. passenger train to use electric locomotives. 1960 – Forced out by the April Revolution, President of South Korea Syngman Rhee resigns after 12 years of dictatorial rule. 1962 – NASA's Ranger 4 spacecraft crashes into the Moon. 1962 – The British space programme launches its first satellite, the Ariel 1. 1963 – In Libya, amendments to the constitution transform Libya (United Kingdom of Libya) into one national unity (Kingdom of Libya) and allows for female participation in elections. 1964 – Tanganyika and Zanzibar merge to form the United Republic of Tanzania. 1966 – The magnitude 5.1 Tashkent earthquake affects the largest city in Soviet Central Asia with a maximum MSK intensity of VII (Very strong). Tashkent is mostly destroyed and 15–200 are killed. 1966 – A new government is formed in the Republic of the Congo, led by Ambroise Noumazalaye. 1970 – The Convention Establishing the World Intellectual Property Organization enters into force. 1981 – Dr. Michael R. Harrison of the University of California, San Francisco Medical Center performs the world's first human open fetal surgery. 1986 – The Chernobyl disaster occurs in the Ukrainian Soviet Socialist Republic. 1989 – The deadliest known tornado strikes Central Bangladesh, killing upwards of 1,300, injuring 12,000, and leaving as many as 80,000 homeless. 1989 – People's Daily publishes the April 26 Editorial which inflames the nascent Tiananmen Square protests. 1991 – Fifty-five tornadoes break out in the central United States. Before the outbreak's end, Andover, Kansas, would record the year's only F5 tornado. 1993 – The Space Shuttle Columbia is launched on mission STS-55 to conduct experiments aboard the Spacelab module. 1994 – China Airlines Flight 140 crashes at Nagoya Airport in Japan, killing 264 of the 271 people on board. 1994 – South Africa begins its first multiracial election, which is won by Nelson Mandela's African National Congress. 2002 – Robert Steinhäuser kills 16 at Gutenberg-Gymnasium in Erfurt, Germany before dying of a self-inflicted gunshot. 2005 – Cedar Revolution: Under international pressure, Syria withdraws the last of its 14,000 troop military garrison in Lebanon, ending its 29-year military domination of that country (Syrian occupation of Lebanon). 2015 – Nursultan Nazarbayev is re-elected President of Kazakhstan with 97.7% of the vote. Births Pre-1600 121 – Marcus Aurelius, Roman emperor (d. 180) 757 – Hisham I of Córdoba (d. 796) 764 – Al-Hadi, Iranian caliph (d. 786) 1284 – Alice de Toeni, Countess of Warwick (d. 1324) 1319 – John II of France (d. 1364) 1538 – Gian Paolo Lomazzo, Italian painter and academic (d. 1600) 1575 – Marie de' Medici, queen of Henry IV of France (d. 1642) 1601–1900 1647 – William Ashhurst, English banker, Sheriff of London, Lord Mayor of London and politician (d. 1720) 1648 – Peter II of Portugal (d. 1706) 1697 – Adam Falckenhagen, German lute player and composer (d. 1754) 1710 – Thomas Reid, Scottish philosopher and academic (d. 1796) 1718 – Esek Hopkins, American commander (d. 1802) 1774 – Christian Leopold von Buch, German geologist and paleontologist (d. 1853) 1782 – Maria Amalia of Naples and Sicily, Queen of France (d. 1866) 1785 – John James Audubon, French-American ornithologist and painter (d. 1851) 1787 – Ludwig Uhland, German poet, philologist, and historian (d. 1862) 1798 – Eugène Delacroix, French painter and lithographer (d. 1863) 1801 – Ambrose Dudley Mann, American politician and diplomat, 1st United States Assistant Secretary of State (d. 1889) 1804 – Charles Goodyear, American banker, lawyer, and politician (d. 1876) 1822 – Frederick Law Olmsted, American journalist and designer, co-designed Central Park (d. 1903) 1834 – Charles Farrar Browne, American author (d. 1867) 1856 – Joseph Ward, Australian-New Zealand businessman and politician, 17th Prime Minister of New Zealand (d. 1930) 1862 – Edmund C. Tarbell, American painter and educator (d. 1938) 1865 – Akseli Gallen-Kallela, Finnish artist (d. 1931) 1876 – Ernst Felle, German rower (d. 1959) 1877 – James Dooley, Irish-Australian politician, 21st Premier of New South Wales (d. 1950) 1878 – Rafael Guízar y Valencia, Mexican bishop and saint (d. 1938) 1879 – Eric Campbell, British actor (d. 1917) 1879 – Owen Willans Richardson, English physicist and academic, Nobel Prize laureate (d. 1959) 1886 – Ma Rainey, American singer-songwriter (d. 1939) 1886 – Ğabdulla Tuqay, Russian poet and publicist (d. 1913) 1889 – Anita Loos, American author, playwright, and screenwriter (d. 1981) 1889 – Ludwig Wittgenstein, Austrian-English philosopher and academic (d. 1951) 1894 – Rudolf Hess, Egyptian-German politician (d. 1987) 1896 – Ruut Tarmo, Estonian actor and director (d. 1967) 1896 – Ernst Udet, German colonel and pilot (d. 1941) 1897 – Eddie Eagan, American boxer and bobsledder (d. 1967) 1897 – Douglas Sirk, German-American director and screenwriter (d. 1987) 1898 – Vicente Aleixandre, Spanish poet and author, Nobel Prize laureate (d. 1984) 1898 – John Grierson, Scottish director and producer (d. 1972) 1899 – Oscar Rabin, Latvian-English saxophonist and bandleader (d. 1958) 1900 – Eva Aschoff, German bookbinder and calligrapher (d. 1969) 1900 – Charles Francis Richter, American seismologist and physicist (d. 1985) 1900 – Hack Wilson, American baseball player (d. 1948) 1901–present 1904 – Paul-Émile Léger, Canadian cardinal (d. 1991) 1904 – Xenophon Zolotas, Greek economist and politician, 177th Prime Minister of Greece (d. 2004) 1905 – Jean Vigo, French director and screenwriter (d. 1934) 1907 – Ilias Tsirimokos, Greek politician, Prime Minister of Greece (d. 1968) 1909 – Marianne Hoppe, German actress (d. 2002) 1910 – Tomoyuki Tanaka, Japanese screenwriter and producer (d. 1997) 1911 – Paul Verner, German soldier and politician (d. 1986) 1912 – A. E. van Vogt, Canadian-American author (d. 2000) 1914 – Bernard Malamud, American novelist and short story writer (d. 1986) 1914 – James Rouse, American real estate developer (d. 1996) 1916 – Eyvind Earle, American artist, author, and illustrator (d. 2000) 1916 – Ken Wallis, English commander, engineer, and pilot (d. 2013) 1916 – Morris West, Australian author and playwright (d. 1999) 1917 – Sal Maglie, American baseball player and coach (d. 1992) 1917 – I. M. Pei, Chinese-American architect, designed the National Gallery of Art and Bank of China Tower (d. 2019) 1917 – Virgil Trucks, American baseball player and coach (d. 2013) 1918 – Fanny Blankers-Koen, Dutch sprinter and long jumper (d. 2004) 1921 – Jimmy Giuffre, American clarinet player, saxophonist, and composer (d. 2008) 1922 – J. C. Holt, English historian and academic (d. 2014) 1922 – Jeanne Sauvé, Canadian journalist and politician, Governor General of Canada (d. 1993) 1922 – Margaret Scott, South African-Australian ballerina and choreographer (d. 2019) 1924 – Browning Ross, American runner and soldier (d. 1998) 1925 – Vladimir Boltyansky, Russian mathematician, educator and author (d. 2019) 1925 – Gerard Cafesjian, American businessman and philanthropist (d. 2013) 1925 – Michele Ferrero, Italian entrepreneur (d. 2015) 1925 – Frank Hahn, British economist (d. 2013) 1926 – Michael Mathias Prechtl, German soldier and illustrator (d. 2003) 1927 – Jack Douglas, English actor (d. 2008) 1927 – Anne McLaren, British scientist (d. 2007) 1927 – Harry Gallatin, American basketball player and coach (d. 2015) 1927 – Granny Hamner, American baseball player (d. 1993) 1929 – Richard Mitchell, American author and educator (d. 2002) 1930 – Roger Moens, Belgian runner and sportscaster 1931 – Paul Almond, Canadian director, producer, and screenwriter (d. 2015) 1931 – Bernie Brillstein, American talent agent and producer (d. 2008) 1931 – John Cain Jr., Australian politician, 41st Premier of Victoria (d. 2019) 1932 – Israr Ahmed, Indian-Pakistani theologian, philosopher, and scholar (d. 2010) 1932 – Shirley Cawley, English long jumper 1932 – Frank D'Rone, American singer and guitarist (d. 2013) 1932 – Francis Lai, French accordion player and composer (d. 2018) 1932 – Michael Smith, English-Canadian biochemist and geneticist, Nobel Prize laureate (d. 2000) 1933 – Carol Burnett, American actress, singer, and producer 1933 – Filiberto Ojeda Ríos, Puerto Rican-American general (d. 2005) 1933 – Arno Allan Penzias, German-American physicist and academic, Nobel Prize laureate 1937 – Jean-Pierre Beltoise, French racing driver and motorcycle racer (d. 2015) 1938 – Duane Eddy, American singer-songwriter, guitarist, and actor 1938 – Maurice Williams, American doo-wop/R&B singer-songwriter 1940 – Molvi Iftikhar Hussain Ansari, Indian cleric and politician (d. 2014) 1940 – Giorgio Moroder, Italian singer-songwriter and producer 1940 – Cliff Watson, English rugby league player (d. 2018) 1941 – Claudine Auger, French model and actress (d. 2019) 1942 – Svyatoslav Belza, Russian journalist, author, and critic (d. 2014) 1942 – Sharon Carstairs, Canadian lawyer and politician, Leader of the Government in the Senate 1942 – Michael Kergin, Canadian diplomat, Canadian Ambassador to the United States 1942 – Bobby Rydell, American singer and actor (d. 2022) 1942 – Jadwiga Staniszkis, Polish sociologist, political scientist, and academic 1943 – Gary Wright, American singer-songwriter, keyboard player, and producer (d. 2023) 1943 – Peter Zumthor, Swiss architect and academic, designed the Therme Vals 1944 – Richard Bradshaw, English conductor (d. 2007) 1945 – Howard Davies, English director and producer (d. 2016) 1945 – Dick Johnson, Australian racing driver 1945 – Sylvain Simard, Canadian academic and politician 1946 – Ralph Coates, English international footballer (d. 2010) 1946 – Marilyn Nelson, American poet and author 1946 – Alberto Quintano, Chilean footballer 1949 – Carlos Bianchi, Argentinian footballer and manager 1949 – Jerry Blackwell, American wrestler (d. 1995) 1951 – John Battle, English politician 1954 – Tatyana Fomina, Estonian chess player 1954 – Alan Hinkes, English mountaineer and explorer 1955 – Kurt Bodewig, German politician 1956 – Koo Stark, American actress and photographer 1958 – John Crichton-Stuart, 7th Marquess of Bute, Scottish racing driver (d. 2021) 1958 – Giancarlo Esposito, American actor, director, and producer 1958 – Georgios Kostikos, Greek footballer, coach, and manager 1959 – John Corabi, American singer-songwriter and guitarist 1959 – Pedro Pierluisi, Puerto Rican politician 1960 – H. G. Carrillo, American writer and academic (d. 2020) 1960 – Steve Lombardozzi, American baseball player and coach 1960 – Roger Taylor, English drummer 1961 – Joan Chen, Chinese-American actress, director, producer, and screenwriter 1961 – Chris Mars, American artist 1962 – Colin Anderson, English footballer 1962 – Debra Wilson, American actress and comedian 1963 – Jet Li, Chinese-Singaporean martial artist, actor, and producer 1963 – Colin Scotts, Australian-American football player 1963 – Cornelia Ullrich, German hurdler 1963 – Bill Wennington, Canadian basketball player 1965 – Susannah Harker, English actress 1965 – Kevin James, American actor and comedian 1967 – Glenn Thomas Jacobs, American professional wrestler, actor, businessman and politician 1967 – Marianne Jean-Baptiste, English actress and singer-songwriter 1967 – Toomas Tõniste, Estonian sailor and politician 1970 – Dean Austin, English footballer and manager 1970 – Melania Trump, Slovene-American model; 47th First Lady of the United States 1970 – Kristen R. Ghodsee, American ethnographer and academic 1970 – Tionne "T-Boz" Watkins, American singer-songwriter, dancer, and actress 1971 – Naoki Tanaka, Japanese comedian and actor 1971 – Jay DeMarcus, American bass player, songwriter, and producer 1972 – Jason Bargwanna, Australian racing driver 1972 – Kiko, Spanish footballer 1972 – Natrone Means, American football player and coach 1972 – Avi Nimni, Israeli footballer and manager 1973 – Geoff Blum, American baseball player and sportscaster 1973 – Jules Naudet, French-American director and producer 1973 – Chris Perry, English footballer 1973 – Óscar, Spanish footballer and coach 1975 – Joey Jordison, American musician and songwriter (d. 2021) 1975 – Rahul Verma, Indian social worker and activist 1976 – Luigi Panarelli, Italian footballer 1976 – Václav Varaďa, Czech ice hockey player 1977 – Samantha Cristoforetti, Italian astronaut 1977 – Kosuke Fukudome, Japanese baseball player 1977 – Roxana Saberi, American journalist and author 1977 – Tom Welling, American actor 1978 – Stana Katic, Canadian actress 1978 – Peter Madsen, Danish footballer 1980 – Jordana Brewster, Panamanian-American actress 1980 – Marlon King, English footballer 1980 – Anna Mucha, Polish actress and journalist 1980 – Channing Tatum, American actor and producer 1981 – Caro Emerald, Dutch pop and jazz singer 1981 – Ms. Dynamite, English rapper and producer 1981 – Sandra Schmitt, German skier (d. 2000) 1982 – Novlene Williams-Mills, Jamaican sprinter 1983 – José María López, Argentinian racing driver 1983 – Jessica Lynch, American soldier 1985 – John Isner, American tennis player 1985 – Andrea Koch Benvenuto, Chilean tennis player 1986 – Lior Refaelov, Israeli footballer 1986 – Yuliya Zaripova, Russian runner 1987 – Jorge Andújar Moreno, Spanish footballer 1988 – Ben Spina, Australian rugby league player 1988 – Manuel Viniegra, Mexican footballer 1988 – Gareth Evans, English footballer 1989 – Melvin Ingram, American football player 1989 – Kang Daesung, South Korean singer 1990 – Mitch Rein, Australian rugby league player 1990 – Nevin Spence, Northern Irish rugby player (d. 2012) 1991 – Lazaros Fotias, Greek footballer 1991 – Peter Handscomb, Australian cricketer 1991 – Isaac Liu, New Zealand rugby league player 1991 – Ignacio Lores Varela, Uruguayan footballer 1991 – Srdjan Pejicic, Canadian/Bosnian basketball player 1991 – Wojciech Pszczolarski, Polish bicycle racer 1992 – Aaron Judge, American baseball player 1992 – Delon Wright, American basketball player 1994 – Daniil Kvyat, Russian racing driver 1996 – Jordan Pefok, American footballer 2001 – Thiago Almada, Argentine footballer 2002 – Meagan Best, Barbadian squash player Deaths Pre-1600 499 – Emperor Xiaowen of Northern Wei (b. 467) 645 – Richarius, Frankish monk and saint (b. 560) 680 – Muawiyah I, Umayyad caliph (b. 602) 757 – Pope Stephen II (b. 715) 893 – Chen Jingxuan, general of the Tang Dynasty 962 – Adalbero I, bishop of Metz 1192 – Emperor Go-Shirakawa of Japan (b. 1127) 1366 – Simon Islip, Archbishop of Canterbury 1392 – Jeong Mong-ju, Korean civil minister, diplomat and scholar (b. 1338) 1444 – Robert Campin, Flemish painter (b. 1378) 1478 – Giuliano de' Medici, Italian ruler (b. 1453) 1489 – Ashikaga Yoshihisa, Japanese shōgun (b. 1465) 1558 – Jean Fernel, French physician (b. 1497) 1601–1900 1686 – Magnus Gabriel De la Gardie, Swedish statesman and military man (b. 1622) 1716 – John Somers, 1st Baron Somers, English jurist and politician, Lord High Chancellor of Great Britain (b. 1651) 1784 – Nano Nagle, Irish nun and educator, founded the Presentation Sisters (b. 1718) 1789 – Petr Ivanovich Panin, Russian general (b. 1721) 1809 – Bernhard Schott, German music publisher (b. 1748) 1865 – John Wilkes Booth, American actor, assassin of Abraham Lincoln (b. 1838) 1881 – Ludwig Freiherr von und zu der Tann-Rathsamhausen, German general (b. 1815) 1895 – Eric Stenbock, Estonian-English author and poet (b. 1860) 1901–present 1910 – Bjørnstjerne Bjørnson, Norwegian-French author, poet, and playwright, Nobel Prize laureate (b. 1832) 1915 – John Bunny, American actor (b. 1863) 1915 – Ida Hunt Udall, American diarist (b. 1858) 1916 – Mário de Sá-Carneiro, Portuguese poet and writer (b. 1890) 1920 – Srinivasa Ramanujan, Indian mathematician and theorist (b. 1887) 1932 – William Lockwood, English cricketer (b. 1868) 1934 – Arturs Alberings, Latvian politician, former Prime Minister of Latvia (b. 1876) 1940 – Carl Bosch, German chemist and engineer, Nobel Prize laureate (b. 1874) 1944 – Violette Morris, French footballer, shot putter, and discus thrower (b. 1893) 1945 – Sigmund Rascher, German physician (b. 1909) 1945 – Pavlo Skoropadskyi, German-Ukrainian general and politician, Hetman of Ukraine (b. 1871) 1946 – James Larkin White, American miner, explorer, and park ranger (b. 1882) 1950 – George Murray Hulbert, American lawyer, judge, and politician (b. 1881) 1951 – Arnold Sommerfeld, German physicist and academic (b. 1868) 1956 – Edward Arnold, American actor (b. 1890) 1957 – Gichin Funakoshi, Japanese martial artist, founded Shotokan (b. 1868) 1964 – E. J. Pratt, Canadian poet and author (b. 1882) 1968 – John Heartfield, German illustrator and photographer (b. 1891) 1969 – Morihei Ueshiba, Japanese martial artist, founded aikido (b. 1883) 1970 – Erik Bergman, Swedish minister and author (b. 1886) 1970 – Gypsy Rose Lee, American actress, striptease dancer, and writer (b. 1911) 1973 – Irene Ryan, American actress and philanthropist (b. 1902) 1976 – Sidney Franklin, American bullfighter (b. 1903) 1976 – Sid James, South African-English actor (b. 1913) 1976 – Armstrong Sperry, American author and illustrator (b. 1897) 1980 – Cicely Courtneidge, Australian-born British actress, comedian and singer (b. 1893) 1981 – Jim Davis, American actor (b. 1909) 1984 – Count Basie, American pianist, composer, and bandleader (b. 1904) 1986 – Broderick Crawford, American actor (b. 1911) 1986 – Bessie Love, American actress (b. 1898) 1986 – Dechko Uzunov, Bulgarian painter (b. 1899) 1987 – Shankar, Indian composer and conductor (b. 1922) 1987 – John Silkin, English lawyer and politician, Shadow Leader of the House of Commons (b. 1923) 1989 – Lucille Ball, American model, actress, comedian, and producer (b. 1911) 1991 – Leo Arnaud, French-American composer and conductor (b. 1904) 1991 – Carmine Coppola, American composer and conductor (b. 1910) 1991 – A. B. Guthrie, Jr., American novelist and historian, (b. 1901) 1991 – Richard Hatfield, Canadian lawyer and politician, 26th Premier of New Brunswick (b. 1931) 1994 – Masutatsu Ōyama, Japanese martial artist, founded Kyokushin kaikan (b. 1923) 1996 – Stirling Silliphant, American screenwriter and producer (b. 1918) 1999 – Adrian Borland, English singer-songwriter, guitarist, and producer (b. 1957) 1999 – Jill Dando, English journalist and television personality (b. 1961) 2003 – Rosemary Brown, Jamaican-Canadian academic and politician (b. 1930) 2003 – Yun Hyon-seok, South Korean poet and author (b. 1984) 2003 – Edward Max Nicholson, Irish environmentalist, co-founded the World Wide Fund for Nature (b. 1904) 2004 – Hubert Selby, Jr., American author, poet, and screenwriter (b. 1928) 2005 – Mason Adams, American actor (b. 1919) 2005 – Elisabeth Domitien, Prime Minister of the Central African Republic (b. 1925) 2005 – Maria Schell, Austrian-Swiss actress (b. 1926) 2005 – Augusto Roa Bastos, Paraguayan journalist, author, and academic (b. 1917) 2007 – Jack Valenti, American businessman, created the MPAA film rating system (b. 1921) 2008 – Árpád Orbán, Hungarian footballer (b. 1938) 2009 – Hans Holzer, Austrian-American paranormal investigator and author (b. 1920) 2010 – Mariam A. Aleem, Egyptian graphic designer and academic (b. 1930) 2010 – Urs Felber, Swiss engineer and businessman (b. 1942) 2011 – Phoebe Snow, American singer-songwriter and guitarist (b. 1950) 2012 – Terence Spinks, English boxer and trainer (b. 1938) 2013 – Jacqueline Brookes, American actress and educator (b. 1930) 2013 – George Jones, American singer-songwriter and guitarist (b. 1931) 2013 – Earl Silverman, Canadian men's rights advocate (b. 1948) 2014 – Gerald Guralnik, American physicist and academic (b. 1936) 2014 – Paul Robeson, Jr., American historian and author (b. 1927) 2014 – DJ Rashad, American electronic musician, producer and DJ (b. 1979) 2015 – Jayne Meadows, American actress (b. 1919) 2015 – Marcel Pronovost, Canadian ice hockey player and coach (b. 1930) 2016 – Harry Wu, Chinese human rights activist (b. 1937) 2017 – Jonathan Demme, American filmmaker, producer and screenwriter (b. 1944) 2022 – Klaus Schulze, German composer and musician (b. 1947) 2023 – Jerry Apodaca, American politician, 24th Governor of New Mexico (b. 1934) Holidays and observances Chernobyl disaster related observances: Day of Remembrance of the Chernobyl tragedy (Belarus) Memorial Day of Radiation Accidents and Catastrophes (Russia) Christian feast day: Aldobrandesca (or Alda) Franca Visalta Lucidius of Verona Our Lady of Good Counsel Pope Anacletus and Marcellinus Rafael Arnáiz Barón Riquier Paschasius Radbertus Peter of Rates (or of Braga) Robert Hunt (Episcopal Church (USA)) Stephen of Perm, see also Old Permic Alphabet Day Trudpert April 26 (Eastern Orthodox liturgics) Confederate Memorial Day (Florida, United States) Union Day (Tanzania) World Intellectual Property Day References External links BBC: On This Day Historical Events on April 26 Days of the year April

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https://en.wikipedia.org/wiki/Anisotropy

Anisotropy

Anisotropy () is the structural property of non-uniformity in different directions, as opposed to isotropy. An anisotropic object or pattern has properties that differ according to direction of measurement. For example, many materials exhibit very different properties when measured along different axes: physical or mechanical properties (absorbance, refractive index, conductivity, tensile strength, etc.). An example of anisotropy is light coming through a polarizer. Another is wood, which is easier to split along its grain than across it because of the directional non-uniformity of the grain (the grain is the same in one direction, not all directions). Fields of interest Computer graphics In the field of computer graphics, an anisotropic surface changes in appearance as it rotates about its geometric normal, as is the case with velvet. Anisotropic filtering (AF) is a method of enhancing the image quality of textures on surfaces that are far away and steeply angled with respect to the point of view. Older techniques, such as bilinear and trilinear filtering, do not take into account the angle a surface is viewed from, which can result in aliasing or blurring of textures. By reducing detail in one direction more than another, these effects can be reduced easily. Chemistry A chemical anisotropic filter, as used to filter particles, is a filter with increasingly smaller interstitial spaces in the direction of filtration so that the proximal regions filter out larger particles and distal regions increasingly remove smaller particles, resulting in greater flow-through and more efficient filtration. In fluorescence spectroscopy, the fluorescence anisotropy, calculated from the polarization properties of fluorescence from samples excited with plane-polarized light, is used, e.g., to determine the shape of a macromolecule. Anisotropy measurements reveal the average angular displacement of the fluorophore that occurs between absorption and subsequent emission of a photon. In NMR spectroscopy, the orientation of nuclei with respect to the applied magnetic field determines their chemical shift. In this context, anisotropic systems refer to the electron distribution of molecules with abnormally high electron density, like the pi system of benzene. This abnormal electron density affects the applied magnetic field and causes the observed chemical shift to change. Real-world imagery Images of a gravity-bound or man-made environment are particularly anisotropic in the orientation domain, with more image structure located at orientations parallel with or orthogonal to the direction of gravity (vertical and horizontal). Physics Physicists from University of California, Berkeley reported about their detection of the cosmic anisotropy in cosmic microwave background radiation in 1977. Their experiment demonstrated the Doppler shift caused by the movement of the earth with respect to the early Universe matter, the source of the radiation. Cosmic anisotropy has also been seen in the alignment of galaxies' rotation axes and polarization angles of quasars. Physicists use the term anisotropy to describe direction-dependent properties of materials. Magnetic anisotropy, for example, may occur in a plasma, so that its magnetic field is oriented in a preferred direction. Plasmas may also show "filamentation" (such as that seen in lightning or a plasma globe) that is directional. An anisotropic liquid has the fluidity of a normal liquid, but has an average structural order relative to each other along the molecular axis, unlike water or chloroform, which contain no structural ordering of the molecules. Liquid crystals are examples of anisotropic liquids. Some materials conduct heat in a way that is isotropic, that is independent of spatial orientation around the heat source. Heat conduction is more commonly anisotropic, which implies that detailed geometric modeling of typically diverse materials being thermally managed is required. The materials used to transfer and reject heat from the heat source in electronics are often anisotropic. Many crystals are anisotropic to light ("optical anisotropy"), and exhibit properties such as birefringence. Crystal optics describes light propagation in these media. An "axis of anisotropy" is defined as the axis along which isotropy is broken (or an axis of symmetry, such as normal to crystalline layers). Some materials can have multiple such optical axes. Geophysics and geology Seismic anisotropy is the variation of seismic wavespeed with direction. Seismic anisotropy is an indicator of long range order in a material, where features smaller than the seismic wavelength (e.g., crystals, cracks, pores, layers, or inclusions) have a dominant alignment. This alignment leads to a directional variation of elasticity wavespeed. Measuring the effects of anisotropy in seismic data can provide important information about processes and mineralogy in the Earth; significant seismic anisotropy has been detected in the Earth's crust, mantle, and inner core. Geological formations with distinct layers of sedimentary material can exhibit electrical anisotropy; electrical conductivity in one direction (e.g. parallel to a layer), is different from that in another (e.g. perpendicular to a layer). This property is used in the gas and oil exploration industry to identify hydrocarbon-bearing sands in sequences of sand and shale. Sand-bearing hydrocarbon assets have high resistivity (low conductivity), whereas shales have lower resistivity. Formation evaluation instruments measure this conductivity or resistivity, and the results are used to help find oil and gas in wells. The mechanical anisotropy measured for some of the sedimentary rocks like coal and shale can change with corresponding changes in their surface properties like sorption when gases are produced from the coal and shale reservoirs. The hydraulic conductivity of aquifers is often anisotropic for the same reason. When calculating groundwater flow to drains or to wells, the difference between horizontal and vertical permeability must be taken into account; otherwise the results may be subject to error. Most common rock-forming minerals are anisotropic, including quartz and feldspar. Anisotropy in minerals is most reliably seen in their optical properties. An example of an isotropic mineral is garnet. Medical acoustics Anisotropy is also a well-known property in medical ultrasound imaging describing a different resulting echogenicity of soft tissues, such as tendons, when the angle of the transducer is changed. Tendon fibers appear hyperechoic (bright) when the transducer is perpendicular to the tendon, but can appear hypoechoic (darker) when the transducer is angled obliquely. This can be a source of interpretation error for inexperienced practitioners. Materials science and engineering Anisotropy, in materials science, is a material's directional dependence of a physical property. This is a critical consideration for materials selection in engineering applications. A material with physical properties that are symmetric about an axis that is normal to a plane of isotropy is called a transversely isotropic material. Tensor descriptions of material properties can be used to determine the directional dependence of that property. For a monocrystalline material, anisotropy is associated with the crystal symmetry in the sense that more symmetric crystal types have fewer independent coefficients in the tensor description of a given property. When a material is polycrystalline, the directional dependence on properties is often related to the processing techniques it has undergone. A material with randomly oriented grains will be isotropic, whereas materials with texture will be often be anisotropic. Textured materials are often the result of processing techniques like cold rolling, wire drawing, and heat treatment. Mechanical properties of materials such as Young's modulus, ductility, yield strength, and high-temperature creep rate, are often dependent on the direction of measurement. Fourth-rank tensor properties, like the elastic constants, are anisotropic, even for materials with cubic symmetry. The Young's modulus relates stress and strain when an isotropic material is elastically deformed; to describe elasticity in an anisotropic material, stiffness (or compliance) tensors are used instead. In metals, anisotropic elasticity behavior is present in all single crystals with three independent coefficients for cubic crystals, for example. For face-centered cubic materials such as nickel and copper, the stiffness is highest along the <111> direction, normal to the close-packed planes, and smallest parallel to <100>. Tungsten is so nearly isotropic at room temperature that it can be considered to have only two stiffness coefficients; aluminium is another metal that is nearly isotropic. For an isotropic material, where is the shear modulus, is the Young's modulus, and is the material's Poisson's ratio. Therefore, for cubic materials, we can think of anisotropy, , as the ratio between the empirically determined shear modulus for the cubic material and its (isotropic) equivalent: The latter expression is known as the Zener ratio, , where refers to elastic constants in Voigt (vector-matrix) notation. For an isotropic material, the ratio is one. Limitation of the Zener ratio to cubic materials is waived in the Tensorial anisotropy index AT that takes into consideration all the 27 components of the fully anisotropic stiffness tensor. It is composed of two major parts and , the former referring to components existing in cubic tensor and the latter in anisotropic tensor so that This first component includes the modified Zener ratio and additionally accounts for directional differences in the material, which exist in orthotropic material, for instance. The second component of this index covers the influence of stiffness coefficients that are nonzero only for non-cubic materials and remains zero otherwise. Fiber-reinforced or layered composite materials exhibit anisotropic mechanical properties, due to orientation of the reinforcement material. In many fiber-reinforced composites like carbon fiber or glass fiber based composites, the weave of the material (e.g. unidirectional or plain weave) can determine the extent of the anisotropy of the bulk material. The tunability of orientation of the fibers allows for application-based designs of composite materials, depending on the direction of stresses applied onto the material. Amorphous materials such as glass and polymers are typically isotropic. Due to the highly randomized orientation of macromolecules in polymeric materials, polymers are in general described as isotropic. However, mechanically gradient polymers can be engineered to have directionally dependent properties through processing techniques or introduction of anisotropy-inducing elements. Researchers have built composite materials with aligned fibers and voids to generate anisotropic hydrogels, in order to mimic hierarchically ordered biological soft matter. 3D printing, especially Fused Deposition Modeling, can introduce anisotropy into printed parts. This is due to the fact that FDM is designed to extrude and print layers of thermoplastic materials. This creates materials that are strong when tensile stress is applied in parallel to the layers and weak when the material is perpendicular to the layers. Microfabrication Anisotropic etching techniques (such as deep reactive-ion etching) are used in microfabrication processes to create well defined microscopic features with a high aspect ratio. These features are commonly used in MEMS (microelectromechanical systems) and microfluidic devices, where the anisotropy of the features is needed to impart desired optical, electrical, or physical properties to the device. Anisotropic etching can also refer to certain chemical etchants used to etch a certain material preferentially over certain crystallographic planes (e.g., KOH etching of silicon [100] produces pyramid-like structures) Neuroscience Diffusion tensor imaging is an MRI technique that involves measuring the fractional anisotropy of the random motion (Brownian motion) of water molecules in the brain. Water molecules located in fiber tracts are more likely to move anisotropically, since they are restricted in their movement (they move more in the dimension parallel to the fiber tract rather than in the two dimensions orthogonal to it), whereas water molecules dispersed in the rest of the brain have less restricted movement and therefore display more isotropy. This difference in fractional anisotropy is exploited to create a map of the fiber tracts in the brains of the individual. Remote sensing and radiative transfer modeling Radiance fields (see Bidirectional reflectance distribution function (BRDF)) from a reflective surface are often not isotropic in nature. This makes calculations of the total energy being reflected from any scene a difficult quantity to calculate. In remote sensing applications, anisotropy functions can be derived for specific scenes, immensely simplifying the calculation of the net reflectance or (thereby) the net irradiance of a scene. For example, let the BRDF be where 'i' denotes incident direction and 'v' denotes viewing direction (as if from a satellite or other instrument). And let P be the Planar Albedo, which represents the total reflectance from the scene. It is of interest because, with knowledge of the anisotropy function as defined, a measurement of the BRDF from a single viewing direction (say, ) yields a measure of the total scene reflectance (planar albedo) for that specific incident geometry (say, ). See also Circular symmetry References External links "Overview of Anisotropy" DoITPoMS Teaching and Learning Package: "Introduction to Anisotropy" "Gauge, and knitted fabric generally, is an anisotropic phenomenon" Orientation (geometry) Asymmetry

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https://en.wikipedia.org/wiki/Extreme%20poverty

Extreme poverty

Extreme poverty is the most severe type of poverty, defined by the United Nations (UN) as "a condition characterized by severe deprivation of basic human needs, including food, safe drinking water, sanitation facilities, health, shelter, education and information. It depends not only on income but also on access to services". Historically, other definitions have been proposed within the United Nations. In 2018, extreme poverty mainly refers to an income below the international poverty line of $1.90 per day (in 2011 prices, $ in dollars), set by the World Bank. In October 2017, the World Bank updated the international poverty line, a global absolute minimum, to $1.90 a day. This is the equivalent of $1.00 a day in 1996 US prices, hence the widely used expression "living on less than a dollar a day". The vast majority of those in extreme poverty reside in South Asia and Sub-Saharan Africa. As of 2018, it is estimated that the country with the most people living in extreme poverty is Nigeria, at 86 million. In the past, the vast majority of the world population lived in conditions of extreme poverty. The percentage of the global population living in absolute poverty fell from over 80% in 1800 to under 20% by 2015. According to UN estimates, roughly 734 million people or 10% remained under those conditions. The number had previously been measured as 1.9 billion in 1990, and 1.2 billion in 2008. Despite the significant number of individuals still below the international poverty line, these figures represent significant progress for the international community, as they reflect a decrease of more than one billion people over 15 years. In public opinion surveys around the globe, people surveyed tend to think that extreme poverty has not decreased. The reduction of extreme poverty and hunger was the first Millennium Development Goal (MDG1), as set by the United Nations in 2000. Specifically, the target was to reduce the extreme poverty rate by half by 2015, a goal that was met five years ahead of schedule. In the Sustainable Development Goals, which succeeded the MDGs, the goal is to end extreme poverty in all its forms everywhere. With this declaration the international community, including the UN and the World Bank have adopted the target of ending extreme poverty by 2030. Definition Previous definitions In July 1993, Leandro Despouy, the then UN Special Rapporteur on extreme poverty and human rights made use of a definition he adapted from a 1987 report to the French Economic and Social Council by Fr. Joseph Wresinski, founder of the International Movement ATD Fourth World, distinguishing "lack of basic security" (poverty) and "chronic poverty" (extreme poverty), linking the eradication of extreme poverty by allowing people currently experiencing it a real opportunity to exercise all their human rights: "The lack of basic security connotes the absence of one or more factors enabling individuals and families to assume basic responsibilities and to enjoy fundamental rights. The situation may become widespread and result in more serious and permanent consequences. The lack of basic security leads to chronic poverty when it simultaneously affects several aspects of people's lives, when it is prolonged and when it severely compromises people's chances of regaining their rights and of reassuming their responsibilities in the foreseeable future." This definition was mentioned previously, in June 1989, in the preliminary report on the realization of economic, social and cultural rights by the UN Special Rapporteur Danilo Türk. It is still in use today, among others, in the current UN Guiding Principles on Extreme Poverty and Human Rights adopted by the UN Human Rights Council in September 2012 Consumption-based definition Extreme poverty is defined by the international community as living below $1.90 a day, as measured in 2011 international prices (equivalent to $2.12 in 2018). This number, also known as the international poverty line, is periodically updated to account for inflation and differences in the cost of living; it was originally defined at $1.00 a day in 1996. The updates are made according to new price data to portray the costs of basic food, health services, clothing, and shelter around the world as accurately as possible. The latest revision was made in 2015 when the World Bank increased the line to international- $1.90. Because many of the world's poorest people do not have a monetary income, the poverty measurement is based on the monetary value of a person's consumption. Otherwise the poverty measurement would be missing the home production of subsistence farmers that consume largely their own production. Alternative definitions The $1.90/day extreme poverty line remains the most widely used metric as it highlights the reality of those in the most severe conditions. Although widely used by most international organizations, it has come under scrutiny due to a variety of factors. For example, it does not account for how far below the line people are, referred to as the depth of poverty. For this purpose, the same institutions publish data on the poverty gap. The international poverty line is designed to stay constant over time, to allow comparisons between different years. It is therefore a measure of absolute poverty and is not measuring relative poverty. It is also not designed to capture how people view their own financial situation (known as the socially subjective poverty line). Moreover, the calculation of the poverty line relies on information about consumer prices to calculate purchasing power parity, which are very hard to measure and are necessarily debatable. As with all other metrics, there may also be missing data from the poorest and most fragile countries. Several alternative instruments for measuring extreme poverty have been suggested which incorporate other factors such as malnutrition and lack of access to a basic education. The Multidimensional Poverty Index (MPI), based on the Alkire-Foster Method, is published by the Oxford Poverty & Human Development Initiative (OPHI): it measures deprivation in basic needs and can be broken down to reflect both the incidence and the intensity of poverty. For example, under conventional measures, in both Ethiopia and Uzbekistan about 40% of the population is considered extremely poor, but based on the MPI, 90% of Ethiopians but only 2% of Uzbeks are in multidimensional poverty. The MPI is useful for development officials to determine the most likely causes of poverty within a region, using the M0 measure of the method (which is calculated by multiplying the fraction of people in poverty by the fraction of dimensions they are deprived in). For example, in the Gaza Strip of Palestine, using the M0 measure of the Alkire-Foster method reveals that poverty in the region is primarily caused by a lack of access to electricity, lack of access to drinking water, and widespread overcrowding. In contrast, data from the Chhukha District of Bhutan reveals that income is a much larger contributor to poverty as opposed to other dimensions within the region. However, the MPI only presents data from 105 countries, so it cannot be used for global measurements. Share of the population living in extreme poverty Current trends Getting to zero Using the World Bank definition of $1.90/day, , roughly 710 million people remained in extreme poverty (or roughly 1 in 10 people worldwide). Nearly half of them live in India and China, with more than 85% living in just 20 countries. Since the mid-1990s, there has been a steady decline in both the worldwide poverty rate and the total number of extreme poor. In 1990, the percentage of the global population living in extreme poverty was 43%, but in 2011, that percentage had dropped down to 21%. This halving of the extreme poverty rate falls in line with the first Millennium Development Goal (MDG1) proposed by former UN Secretary-General Kofi Annan, who called on the international community at the turn of the century to reduce the percentage of people in extreme poverty by half by 2015. This reduction in extreme poverty took place most notably in China, Indonesia, India, Pakistan and Vietnam. These five countries accounted for the alleviation of 715 million people out of extreme poverty between 1990 and 2010 – more than the global net total of roughly 700 million. This statistical oddity can be explained by the fact that the number of people living in extreme poverty in Sub-Saharan Africa rose from 290 million to 414 million over the same period. However, there have been many positive signs for extensive, global poverty reduction as well. Since 1999, the total number of extreme poor has declined by an average of 50 million per year. Moreover, in 2005, for the first time in recorded history, poverty rates began to fall in every region of the world, including Africa. As aforementioned, the number of people living in extreme poverty has reduced from 1.9 billion to 766 million over the span of the last decades. If we remain on our current trajectory, many economists predict we could reach global zero by 2030–2035, thus ending extreme poverty. Global zero entails a world in which fewer than 3% of the global population lives in extreme poverty (projected under most optimistic scenarios to be fewer than 200 million people). This zero figure is set at 3% in recognition of the fact that some amount of frictional (temporary) poverty will continue to exist, whether it is caused by political conflict or unexpected economic fluctuations, at least for the foreseeable future. However, the Brookings Institution notes that any projection about poverty more than a few years into the future runs the risk of being highly uncertain. This is because changes in consumption and distribution throughout the developing world over the next two decades could result in monumental shifts in global poverty, for better or worse. Others are more pessimistic about this possibility, predicting a range of 193 million to 660 million people still living in extreme poverty by 2035. Additionally, some believe the rate of poverty reduction will slow down in the developing world, especially in Africa, and as such it will take closer to five decades to reach global zero. Despite these reservations, several prominent international and national organizations, including the UN, the World Bank and the United States Federal Government (via USAID), have set a target of reaching global zero by the end of 2030. Exacerbating factors There are a variety of factors that may reinforce or instigate the existence of extreme poverty, such as weak institutions, cycles of violence and a low level of growth. Recent World Bank research shows that some countries can get caught in a "fragility trap", in which self-reinforcing factors prevent the poorest nations from emerging from low-level equilibrium in the long run. Moreover, most of the reduction in extreme poverty over the past twenty years has taken place in countries that have not experienced a civil conflict or have had governing institutions with a strong capacity to actually govern. Thus, to end extreme poverty, it is also important to focus on the interrelated problems of fragility and conflict. USAID defines fragility as a government's lack of both legitimacy (the perception the government is adequate at doing its job) and effectiveness (how good the government is at maintaining law and order, in an equitable manner). As fragile nations are unable to equitably and effectively perform the functions of a state, these countries are much more prone to violent unrest and mass inequality. Additionally, in countries with high levels of inequality (a common problem in countries with inadequate governing institutions), much higher growth rates are needed to reduce the rate of poverty when compared with other nations. Additionally, if China and India are removed from the equation, up to 70% of the world's poor live in fragile states by some definitions of fragility. Some analysts project that extreme poverty will be increasingly concentrated in fragile, low-income states like Haiti, Yemen and the Central African Republic. However, some academics, such as Andy Sumner, say that extreme poverty will be increasingly concentrated in middle-income countries, creating a paradox where the world's poor do not actually live in the poorest countries. To help low-income earners, fragile states make the transition towards peace and prosperity, the New Deal for Engagement in Fragile States, endorsed by roughly forty countries and multilateral institutions, was created in 2011. This represents an important step towards redressing the problem of fragility as it was originally articulated by self-identified fragile states who called on the international community to not only "do things differently", but to also "do different things". Civil conflict also remains a prime cause for the perpetuation of poverty throughout the developing world. Armed conflict can have severe effects on economic growth for many reasons such as the destruction of assets, destruction of livelihoods, creation of unwanted mass migration, and diversion of public resources towards war. Significantly, a country that experienced major violence during 1981–2005 had extreme poverty rates 21 percentage points higher than a country with no violence. On average, each civil conflict will cost a country roughly 30 years of GDP growth. Therefore, a renewed commitment from the international community to address the deteriorating situation in highly fragile states is necessary to both prevent the mass loss of life, but to also prevent the vicious cycle of extreme poverty. Population trends and dynamics (e.g. population growth) can also have a large impact on prospects for poverty reduction. According to the United Nations, "in addition to improving general health and well-being, analysis shows that meeting the reproductive health and contraceptive needs of all women in the developing world more than pays for itself"). In 2013, a prevalent finding in a report by the World Bank was that extreme poverty is most prevalent in low-income countries. In these countries, the World Bank found that progress in poverty reduction is the slowest, the poor live under the worst conditions, and the most affected persons are children age 12 and under. International initiatives Millennium Summit and Millennium Development Goals In September 2000, world leaders gathered at the Millennium Summit held in New York, launching the United Nations Millennium Project suggested by then UN Secretary-General Kofi Annan. Prior to the launch of the conference, the office of Secretary-General Annan released a report entitled "We The Peoples: The Role of the United Nations in the 21st Century". In this document, now widely known as the Millennium Report, Kofi Annan called on the international community to reduce the proportion of people in extreme poverty by half by 2015, a target that would affect over 1 billion people. Citing the close correlation between economic growth and the reduction of poverty in poor countries, Annan urged international leaders to indiscriminately target the problem of extreme poverty across every region. In charge of managing the project was Jeffrey Sachs, a noted development economist, who in 2005 released a plan for action called "Investing in Development: A Practical Plan to Achieve the Millennium Development Goals". Thomas Pogge criticized the 2000 Millennium Declaration for being less ambitious than a previous declaration from the World Food Summit due to using 1990 as the benchmark rather than 1996. Overall, there has been significant progress towards reducing extreme poverty, with the MDG1 target of reducing extreme poverty rates by half being met five years early, representing 700 million people being lifted out of extreme poverty from 1990 to 2010, with 1.2 billion people still remaining under those conditions. The notable exception to this trend was in Sub-Saharan Africa, the only region where the number of people living in extreme poverty rose from 290 million in 1990 to 414 million in 2010, comprising more than a third of those living in extreme poverty worldwide. 2005 World Summit The 2005 World Summit, held in September which was organized to measure international progress towards fulfilling the Millennium Development Goals (MDGs). Notably, the conference brought together more than 170 Heads of State. While world leaders at the summit were encouraged by the reduction of poverty in some nations, they were concerned by the uneven decline of poverty within and among different regions of the globe. However, at the end of the summit, the conference attendees reaffirmed the UN's commitment to achieve the MDGs by 2015 and urged all supranational, national and non-governmental organizations to follow suit. Sustainable Development Goals As the expiration of the Millennium Development Goals approached in 2015, the UN convened a panel to advise on a Post-2015 Development Agenda, which led to a new set of 17 goals for 2030 titled the Sustainable Development Goals (SDGs). The first goal (SDG 1) is to "End poverty in all its forms everywhere." The HLP report, entitled A New Global Partnership: Eradicate Poverty and Transform Economies Through Sustainable Development, was published in May 2013. In the report, the HLP wrote that: Ending extreme poverty is just the beginning, not the end. It is vital, but our vision must be broader: to start countries on the path of sustainable development – building on the foundations established by the 2012 UN Conference on Sustainable Development in Rio de Janeiro, and meeting a challenge that no country, developed or developing, has met so far. We recommend to the Secretary-General that deliberations on a new development agenda must be guided by the vision of eradicating extreme poverty once and for all, in the context of sustainable development. Therefore, the report determined that a central goal of the Post-Millennium Development agenda is to eradicate extreme poverty by 2030. However, the report also emphasized that the MDGs were not enough on their own, as they did not "focus on the devastating effects of conflict and violence on development ... the importance to development of good governance and institution ... nor the need for inclusive growth..." Consequently, there now exists synergy between the policy position papers put forward by the United States (through USAID), the World Bank and the UN itself in terms of viewing fragility and a lack of good governance as exacerbating extreme poverty. However, in a departure from the views of other organizations, the commission also proposed that the UN focus not only on extreme poverty (a line drawn at $1.25), but also on a higher target, such as $2. The report notes this change could be made to reflect the fact that escaping extreme poverty is only a first step. In addition to the UN, a host of other supranational and national actors such as the European Union and the African Union have published their own positions or recommendations on what should be incorporated in the Post-2015 agenda. The European Commission's communication, published in A decent Life for all: from vision to collective action, affirmed the UN's commitment to "eradicate extreme poverty in our lifetime and put the world on a sustainable path to ensure a decent life for all by 2030". A unique vision of the report was the commission's environmental focus (in addition to a plethora of other goals such as combating hunger and gender inequality). Specifically, the Commission argued, "long-term poverty reduction ... requires inclusive and sustainable growth. Growth should create decent jobs, take place with resource efficiency and within planetary boundaries, and should support efforts to mitigate climate change." The African Union's report, entitled Common African Position (CAP) on the Post-2015 Development Agenda, likewise encouraged the international community to focus on eradicating the twin problems of poverty and exclusion in our lifetime. Moreover, the CAP pledged that "no person – regardless of ethnicity, gender, geography, disability, race or other status – is denied universal human rights and basic economic opportunities". Least developed country conferences The UN least developed country (LDC) conferences were a series of summits organized by the UN to promote the substantial and even development of the world's least developed countries. The first UN LDC Conference was held between 1 and 14 September 1981, in Paris, the first UN LDC Conference was organized to finalize the UN's "Substantial New Programme of Action" for the 1980s in Least Developed Countries. This program, which was unanimously adopted by the conference attendees, argued for internal reforms in LDCs (meant to encourage economic growth) to be complemented by strong international measures. However, despite the major economic and policy reforms initiated many of these LDCs, in addition to strong international aid, the economic situation of these countries worsened as a whole in the 1980s. This prompted the organization of a 2nd UN LDC conference almost a decade later. The second UN LDC Conference was held between 3 and 14 September 1990, once again in Paris, the second UN LDC Conference was convened to measure the progress made by the LDCs towards fulfilling their development goals during the 1980s. Recognizing the problems that plagued the LDCs over the past decade, the conference formulated a new set of national and international policies to accelerate the growth rates of the poorest nations. These new principles were embodied in the "Paris Declaration and Programme of Action for the Least Developed Countries for the 1990s". The fourth UN LDC Conference was the most recent conference. It was held in May 2011 in Istanbul, recognized that the nature of development had fundamentally changed since the 1st conference held almost 30 years earlier. In the 21st century, the capital flow into emerging economies has increasingly become dominated by foreign direct investment and remittances, as opposed to bilateral and multilateral assistance. Moreover, since the 1980s, significant structural changes have taken place on the international stage. With the creation of the G-20 conference of the largest economic powers, including many nations in the Global South, formerly undeveloped nations are now able to have a much larger say in international relations. Furthermore, the conference recognized that in the midst of a deep global recession, coupled with multiple crises (energy, climate, food, etc.), the international community would have fewer resources to aid the LDCs. Thus, the UN considered the participation of a wide range of stakeholders (not least the LDCs themselves), crucial to the formulation of the conference. Organizations working to end extreme poverty International organizations World Bank In 2013, the Board of Governors of the World Bank Group (WBG) set two overriding goals for the WBG to commit itself to in the future. First, to end extreme poverty by 2030, an objective that echoes the sentiments of the UN and the Obama administration. Additionally, the WBG set an interim target of reducing extreme poverty to below 9% by 2020. Second, to focus on growth among the bottom 40% of people, as opposed to standard GDP growth. This commitment ensures that the growth of the developing world lifts people out of poverty, rather than exacerbating inequality. As the World Bank's primary focus is on delivering economic growth to enable equitable prosperity, its developments programs are primarily commercial-based in nature, as opposed to the UN. Since the World Bank recognizes better jobs will result in higher income, and thus less poverty, the WBG seeks to support employment training initiatives, small business development programs and strong labor protection laws. However, since much of the growth in the developing world has been inequitable, the World Bank has also begun teaming with client states to map out trends in inequality and to propose public policy changes that can level the playing field. Moreover, the World Bank engages in a variety of nutritional, transfer payments and transport-based initiatives. Children who experience under-nutrition from conception to two years of age have a much higher risk of physical and mental disability. Thus, they are often trapped in poverty and are unable to make a full contribution to the social and economic development of their communities as adults. The WBG estimates that as much as 3% of GDP can be lost as a result of under-nutrition among the poorest nations. To combat undernutrition, the WBG has partnered with UNICEF and the WHO to ensure all small children are fully fed. The WBG also offers conditional cash transfers to poor households who meet certain requirements such as maintaining children's healthcare or ensuring school attendance. Finally, the WBG understands investment in public transportation and better roads is key to breaking rural isolation, improving access to healthcare and providing better job opportunities for the World's poor. United Nations The UN Office for the Coordination of Humanitarian Affairs (OCHA) works to synchronize the disparate international, national and non-governmental efforts to contest poverty. OCHA seeks to prevent "confusion" in relief operations and to ensure that the humanitarian response to disaster situations has greater accountability and predictability. To do so, OCHA has begun deploying Humanitarian Coordinators and Country Teams to provide a solid architecture for the international community to work through. The United Nation's Children's Fund (UNICEF) was created by the UN to provide food, clothing and healthcare to European children facing famine and disease in the immediate aftermath of World War II. After the UN General Assembly extended UNICEF's mandate indefinitely in 1953, it actively worked to help children in extreme poverty in more than 190 countries and territories to overcome the obstacles that poverty, violence, disease and discrimination place in a child's path. Its current focus areas are 1) Child survival & development 2) Basic education & gender equality 3) Children and HIV/AIDS and 4) Child protection. The UN Refugee Agency (UNHCR) is mandated to lead and coordinate international action to protect refugees worldwide. Its primary purpose is to safeguard the rights of refugees by ensuring anyone can exercise the right to seek asylum in another state, with the option to return home voluntarily, integrate locally or resettle in a third country. The UNHCR operates in over 125 countries, helping approximately 33.9 million persons. The World Food Programme (WFP) is the largest agency dedicated to fighting hunger worldwide. On average, the WFP brings food assistance to more than 90 million people in 75 countries. The WFP not only strives to prevent hunger in the present, but also in the future by developing stronger communities which will make food even more secure on their own. The WFP has a range of expertise from Food Security Analysis, Nutrition, Food Procurement and Logistics. The World Health Organization (WHO) is responsible for providing leadership on global health matters, shaping the health research agenda, articulating evidence-based policy decisions and combating diseases that are induced from poverty, such as HIV/AIDS, malaria and tuberculosis. Moreover, the WHO deals with pressing issues ranging from managing water safety, to dealing with maternal and newborn health. Governmental agencies USAID The US Agency for International Development (USAID) is the lead US government agency dedicated to ending extreme poverty. Currently the largest bilateral donor in the world, the United States channels the majority of its development assistance through USAID and the US Department of State. In President Obama's 2013 State of the Union address, he declared, "So the United States will join with our allies to eradicate such extreme poverty in the next two decades ... which is within our reach." In response to Obama's call to action, USAID has made ending extreme poverty central to its mission statement. Under its New Model of Development, USAID seeks to eradicate extreme poverty through the use of innovation in science and technology, by putting a greater emphasis on evidence based decision-making, and through leveraging the ingenuity of the private sector and global citizens. A major initiative of the Obama Administration is Power Africa, which aims to bring energy to 20 million people in Sub-Saharan Africa. By reaching out to its international partners, whether commercial or public, the US has leveraged over $14 billion in outside commitments after investing only US$7 billion of its own. To ensure that Power Africa reaches the region's poorest, the initiative engages in a transaction based approach to create systematic change. This includes expanding access to electricity to more than 20,000 additional households which already live without power. In terms of specific programming, USAID works in a variety of fields from preventing hunger, reducing HIV/AIDS, providing general health assistance and democracy assistance, as well as dealing with gender issues. To deal with food security, which affects roughly 842 million people (who go to bed hungry each night), USAID coordinates the Feed the Future Initiative (FtF). FtF aims to reduce poverty and under-nutrition each by 20% over five years. Because of the President's Emergency Plan for AIDS Relief (PEPFAR) and a variety of congruent actors, the incidence of AIDS and HIV, which used to ravage Africa, reduced in scope and intensity. Through PEPFAR, the United States has ensured over five million people have received life-saving antiviral drugs, a significant proportion of the eight million people receiving treatment in relatively poor nations. In terms of general health assistance, USAID has worked to reduce maternal mortality by 30%, under-five child mortality by 35%, and has accomplished a host of other goals. USAID also supports the gamut of democratic initiatives, from promoting human rights and accountable, fair governance, to supporting free and fair elections and the rule of law. In pursuit of these goals, USAID has increased global political participation by training more than 9,800 domestic election observers and providing civic education to more than 6.5 million people. Since 2012, the Agency has begun integrating critical gender perspectives across all aspects of its programming to ensure all USAID initiatives work to eliminate gender disparities. To do so, USAID seeks to increase the capability of women and girls to realize their rights and determine their own life outcomes. Moreover, USAID supports additional programs to improve women's access to capital and markets, builds theirs skills in agriculture, and supports women's desire to own businesses. Others Other major government development agencies with annual aid programmes of more than $10 billion include: GIZ (Germany), FCDO (United Kingdom), JICA (Japan), European Union and AFD (France). Non-Governmental Organizations A multitude of non-governmental organizations operate in the field of extreme poverty, actively working to alleviate the poorest of the poor of their deprivation. To name but a few notable organizations: Save the Children, the Overseas Development Institute, Concern Worldwide, ONE, Trickle Up and Oxfam have all done a considerable amount of work in extreme poverty. Save the Children is the leading international organization dedicated to helping the world's indigent children. In 2013, Save the Children reached over 143 million children through their work, including over 52 million children directly. Save the Children also recently released their own report titled "Getting to Zero", in which they argued the international community could feasibly do more than lift the world's poor above $1.25/day. The Overseas Development Institute (ODI) is a UK based think tank on international development and humanitarian issues. ODI is dedicated to alleviating the suffering of the world's poor by providing high-quality research and practical policy advice to the World's development officials. ODI also recently released a paper entitled, "The Chronic Poverty Report 2014–2015: The road to zero extreme poverty", in which its authors assert that though the international communities' goal of ending extreme poverty by 2030 is laudable, much more targeted resources will be necessary to reach said target. The report states that "To eradicate extreme poverty, massive global investment is required in social assistance, education and pro-poorest economic growth". Concern Worldwide is an international humanitarian organization whose mission is to end extreme poverty by influencing decision makers at all levels of government (from local to international). Concern has also produced a report on extreme poverty in which they explain their own conception of extreme poverty from a NGO's standpoint. In this paper, named "How Concern Understands Extreme Poverty", the report's creators write that extreme poverty entails more than just living under $1.25/day, it also includes having a small number of assets and being vulnerable to severe negative shocks (whether natural or man made). ONE, the organization co-founded by Bono, is a non-profit organization funded almost entirely by foundations, individual philanthropists and corporations. ONE's goals include raising public awareness and working with political leaders to fight preventable diseases, increase government accountability and increase investment in nutrition. Finally, trickleUp is a micro-enterprise development program targeted at those living on under $1.25/day, which provides the indigent with resources to build a sustainable livelihood through both direct financing and considerable training efforts. Oxfam is a non-governmental organization that works prominently in Africa; their mission is to improve local community organizations and it works to reduce impediments to the development of the country. Oxfam helps families suffering from poverty receive food and healthcare to survive. There are many children in Africa experiencing growth stunting, and this is one example of an issue that Oxfam targets and aims to resolve. Cash transfers appear to be an effective intervention for reducing extreme poverty, while at the same time improving health and education outcomes. Campaigns Giving What We Can Global Poverty Project Live Below the Line Make Poverty History See also List of countries by percentage of population living in poverty Income inequality metrics Least developed countries Poverty threshold Poverty reduction Millennium Development Goals (2015) Sustainable Development Goals (2030) Notes References External links Eradicate Extreme Poverty and Hunger by 2015 | UN Millennium Development Goal curated by the Center for Latin American and Caribbean Studies at Michigan State University The Life You Can Save – Acting Now to End World Poverty Scientific American Magazine (September 2005 Issue) Can Extreme Poverty Be Eliminated? International Movement ATD Fourth World Walk In Her Shoes Measurements and definitions of poverty

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https://en.wikipedia.org/wiki/Analytical%20engine

Analytical engine

The analytical engine was a proposed mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage. It was first described in 1837 as the successor to Babbage's difference engine, which was a design for a simpler mechanical calculator. The analytical engine incorporated an arithmetic logic unit, control flow in the form of conditional branching and loops, and integrated memory, making it the first design for a general-purpose computer that could be described in modern terms as Turing-complete. In other words, the structure of the analytical engine was essentially the same as that which has dominated computer design in the electronic era. The analytical engine is one of the most successful achievements of Charles Babbage. Babbage was never able to complete construction of any of his machines due to conflicts with his chief engineer and inadequate funding. It was not until 1941 that Konrad Zuse built the first general-purpose computer, Z3, more than a century after Babbage had proposed the pioneering analytical engine in 1837. Design Babbage's first attempt at a mechanical computing device, the Difference Engine, was a special-purpose machine designed to tabulate logarithms and trigonometric functions by evaluating finite differences to create approximating polynomials. Construction of this machine was never completed; Babbage had conflicts with his chief engineer, Joseph Clement, and ultimately the British government withdrew its funding for the project. During this project, Babbage realised that a much more general design, the analytical engine, was possible. The work on the design of the analytical engine started around 1833. The input, consisting of programs ("formulae") and data, was to be provided to the machine via punched cards, a method being used at the time to direct mechanical looms such as the Jacquard loom. For output, the machine would have a printer, a curve plotter, and a bell. The machine would also be able to punch numbers onto cards to be read in later. It employed ordinary base-10 fixed-point arithmetic. There was to be a store (that is, a memory) capable of holding 1,000 numbers of 50 decimal digits each (ca. 16.6 kB). An arithmetic unit (the "mill") would be able to perform all four arithmetic operations, plus comparisons and optionally square roots. Initially (1838) it was conceived as a difference engine curved back upon itself, in a generally circular layout, with the long store exiting off to one side. Later drawings (1858) depict a regularised grid layout. Like the central processing unit (CPU) in a modern computer, the mill would rely upon its own internal procedures, to be stored in the form of pegs inserted into rotating drums called "barrels", to carry out some of the more complex instructions the user's program might specify. The programming language to be employed by users was akin to modern day assembly languages. Loops and conditional branching were possible, and so the language as conceived would have been Turing-complete as later defined by Alan Turing. Three different types of punch cards were used: one for arithmetical operations, one for numerical constants, and one for load and store operations, transferring numbers from the store to the arithmetical unit or back. There were three separate readers for the three types of cards. Babbage developed some two dozen programs for the analytical engine between 1837 and 1840, and one program later. These programs treat polynomials, iterative formulas, Gaussian elimination, and Bernoulli numbers. In 1842, the Italian mathematician Luigi Federico Menabrea published a description of the engine in French, based on lectures Babbage gave when he visited Turin in 1840. In 1843, the description was translated into English and extensively annotated by Ada Lovelace, who had become interested in the engine eight years earlier. In recognition of her additions to Menabrea's paper, which included a way to calculate Bernoulli numbers using the machine (widely considered to be the first complete computer program), she has been described as the first computer programmer. Construction Late in his life, Babbage sought ways to build a simplified version of the machine, and assembled a small part of it before his death in 1871. In 1878, a committee of the British Association for the Advancement of Science described the analytical engine as "a marvel of mechanical ingenuity", but recommended against constructing it. The committee acknowledged the usefulness and value of the machine, but could not estimate the cost of building it, and were unsure whether the machine would function correctly after being built. Intermittently from 1880 to 1910, Babbage's son Henry Prevost Babbage was constructing a part of the mill and the printing apparatus. In 1910, it was able to calculate a (faulty) list of multiples of pi. This constituted only a small part of the whole engine; it was not programmable and had no storage. (Popular images of this section have sometimes been mislabelled, implying that it was the entire mill or even the entire engine.) Henry Babbage's "analytical engine mill" is on display at the Science Museum in London. Henry also proposed building a demonstration version of the full engine, with a smaller storage capacity: "perhaps for a first machine ten (columns) would do, with fifteen wheels in each". Such a version could manipulate 20 numbers of 25 digits each, and what it could be told to do with those numbers could still be impressive. "It is only a question of cards and time", wrote Henry Babbage in 1888, "... and there is no reason why (twenty thousand) cards should not be used if necessary, in an analytical engine for the purposes of the mathematician". In 1991, the London Science Museum built a complete and working specimen of Babbage's Difference Engine No. 2, a design that incorporated refinements Babbage discovered during the development of the analytical engine. This machine was built using materials and engineering tolerances that would have been available to Babbage, quelling the suggestion that Babbage's designs could not have been produced using the manufacturing technology of his time. In October 2010, John Graham-Cumming started a "Plan 28" campaign to raise funds by "public subscription" to enable serious historical and academic study of Babbage's plans, with a view to then build and test a fully working virtual design which will then in turn enable construction of the physical analytical engine. As of May 2016, actual construction had not been attempted, since no consistent understanding could yet be obtained from Babbage's original design drawings. In particular it was unclear whether it could handle the indexed variables which were required for Lovelace's Bernoulli program. By 2017, the "Plan 28" effort reported that a searchable database of all catalogued material was available, and an initial review of Babbage's voluminous Scribbling Books had been completed. Many of Babbage's original drawings have been digitised and are publicly available online. Instruction set Babbage is not known to have written down an explicit set of instructions for the engine in the manner of a modern processor manual. Instead he showed his programs as lists of states during their execution, showing what operator was run at each step with little indication of how the control flow would be guided. Allan G. Bromley has assumed that the card deck could be read in forwards and backwards directions as a function of conditional branching after testing for conditions, which would make the engine Turing-complete: ...the cards could be ordered to move forward and reverse (and hence to loop)... The introduction for the first time, in 1845, of user operations for a variety of service functions including, most importantly, an effective system for user control of looping in user programs. There is no indication how the direction of turning of the operation and variable cards is specified. In the absence of other evidence I have had to adopt the minimal default assumption that both the operation and variable cards can only be turned backward as is necessary to implement the loops used in Babbage's sample programs. There would be no mechanical or microprogramming difficulty in placing the direction of motion under the control of the user. In their emulator of the engine, Fourmilab say: The Engine's Card Reader is not constrained to simply process the cards in a chain one after another from start to finish. It can, in addition, directed by the very cards it reads and advised by whether the Mill's run-up lever is activated, either advance the card chain forward, skipping the intervening cards, or backward, causing previously-read cards to be processed once again. This emulator does provide a written symbolic instruction set, though this has been constructed by its authors rather than based on Babbage's original works. For example, a factorial program would be written as: N0 6 N1 1 N2 1 × L1 L0 S1 – L0 L2 S0 L2 L0 CB?11 where the CB is the conditional branch instruction or "combination card" used to make the control flow jump, in this case backward by 11 cards. Influence Predicted influence Babbage understood that the existence of an automatic computer would kindle interest in the field now known as algorithmic efficiency, writing in his Passages from the Life of a Philosopher, "As soon as an analytical engine exists, it will necessarily guide the future course of the science. Whenever any result is sought by its aid, the question will then arise—By what course of calculation can these results be arrived at by the machine in the shortest time?" Computer science From 1872 Henry continued diligently with his father's work and then intermittently in retirement in 1875. Percy Ludgate wrote about the engine in 1914 and published his own design for an analytical engine in 1909. It was drawn up in detail, but never built, and the drawings have never been found. Ludgate's engine would be much smaller (about , which corresponds to cube of side length ) than Babbage's, and hypothetically would be capable of multiplying two 20-decimal-digit numbers in about six seconds. In his work Essays on Automatics (1914) Leonardo Torres Quevedo, inspired by Babbage, designed a theoretical electromechanical calculating machine which was to be controlled by a read-only program. The paper also contains the idea of floating-point arithmetic. In 1920, to celebrate the 100th anniversary of the invention of the arithmometer, Torres presented in Paris the Electromechanical Arithmometer, which consisted of an arithmetic unit connected to a (possibly remote) typewriter, on which commands could be typed and the results printed automatically. Vannevar Bush's paper Instrumental Analysis (1936) included several references to Babbage's work. In the same year he started the Rapid Arithmetical Machine project to investigate the problems of constructing an electronic digital computer. Despite this groundwork, Babbage's work fell into historical obscurity, and the analytical engine was unknown to builders of electromechanical and electronic computing machines in the 1930s and 1940s when they began their work, resulting in the need to re-invent many of the architectural innovations Babbage had proposed. Howard Aiken, who built the quickly-obsoleted electromechanical calculator, the Harvard Mark I, between 1937 and 1945, praised Babbage's work likely as a way of enhancing his own stature, but knew nothing of the analytical engine's architecture during the construction of the Mark I, and considered his visit to the constructed portion of the analytical engine "the greatest disappointment of my life". The Mark I showed no influence from the analytical engine and lacked the analytical engine's most prescient architectural feature, conditional branching. J. Presper Eckert and John W. Mauchly similarly were not aware of the details of Babbage's analytical engine work prior to the completion of their design for the first electronic general-purpose computer, the ENIAC. Comparison to other early computers If the analytical engine had been built, it would have been digital, programmable and Turing-complete. It would, however, have been very slow. Luigi Federico Menabrea reported in Sketch of the Analytical Engine: "Mr. Babbage believes he can, by his engine, form the product of two numbers, each containing twenty figures, in three minutes". By comparison the Harvard Mark I could perform the same task in just six seconds. A modern CPU could do the same thing in under a billionth of a second. In popular culture The cyberpunk novelists William Gibson and Bruce Sterling co-authored a steampunk novel of alternative history titled The Difference Engine in which Babbage's difference and analytical engines became available to Victorian society. The novel explores the consequences and implications of the early introduction of computational technology. Moriarty by Modem, a short story by Jack Nimersheim, describes an alternative history where Babbage's analytical engine was indeed completed and had been deemed highly classified by the British government. The characters of Sherlock Holmes and Moriarty had in reality been a set of prototype programs written for the analytical engine. This short story follows Holmes as his program is implemented on modern computers and he is forced to compete against his nemesis yet again in the modern counterparts of Babbage's analytical engine. A similar setting is used by Sydney Padua in the webcomic The Thrilling Adventures of Lovelace and Babbage. It features an alternative history where Ada Lovelace and Babbage have built the analytical engine and use it to fight crime at Queen Victoria's request. The comic is based on thorough research on the biographies of and correspondence between Babbage and Lovelace, which is then twisted for humorous effect. The Orion's Arm online project features the Machina Babbagenseii, fully sentient Babbage-inspired mechanical computers. Each is the size of a large asteroid, only capable of surviving in microgravity conditions, and processes data at 0.5% the speed of a human brain. References Bibliography External links The Babbage Papers, Science Museum archive The Analytical Engine at Fourmilab, includes historical documents and online simulations Image of a later Plan of Analytical Engine with grid layout (1858) First working Babbage "barrel" actually assembled, circa 2005 Special issue, IEEE Annals of the History of Computing, Volume 22, Number 4, October–December 2000 Babbage, Science Museum, London (archived) Plan 28: Building Charles Babbage's Analytical Engine Charles Babbage Computer-related introductions in 1837 English inventions Mechanical calculators Mechanical computers One-of-a-kind computers Ada Lovelace

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https://en.wikipedia.org/wiki/Transport%20in%20Antarctica

Transport in Antarctica

Transport in Antarctica has transformed from explorers crossing the isolated remote area of Antarctica by foot to a more open era due to human technologies enabling more convenient and faster transport, predominantly by air and water, but also by land as well. Transportation technologies on a remote area like Antarctica need to be able to deal with extremely low temperatures and continuous winds to ensure the travelers' safety. Due to the fragility of the Antarctic environment, only a limited amount of transport movements can take place and sustainable transportation technologies have to be used to reduce the ecological footprint. The infrastructure of land, water and air transport needs to be safe and sustainable. Currently thousands of tourists and hundreds of scientists a year depend on the Antarctic transportation system. Land transport Roads Winds continuously blow snow on roads in Antarctica. The South Pole Traverse (McMurdo–South Pole highway) is approximately long and links the United States McMurdo Station on the coast to the Amundsen–Scott South Pole Station. It was constructed by leveling snow and in crevasses, but is not paved. There are flags to mark the road. Also, the United States Antarctic Program maintains two ice roads during the austral summer. One provides access to Pegasus Field on the Ross Ice Shelf. The ice road between Pegasus Field and McMurdo Station is about . The other road provides access to the Ice Runway, which is on sea ice. The road between the Ice Runway and McMurdo Station varies in length from year to year depending on many factors, including ice stability. These roads are critical for resupplying McMurdo Station, Scott Base, and Amundsen–Scott South Pole Station. Vehicles The scarcity and poor quality of road infrastructure limits land transportation by conventional vehicles. A normal car on tires has very limited capability in Antarctic conditions. Scientific bases are often built on snow-free areas (oases) close to the ocean. Around these stations and on a hard packed snow or ice, tire based vehicles can drive but on deeper and softer snow, a normal tire-based vehicle cannot travel. Due to these limitations, vehicles on belts have been the preferred option in Antarctica. In 1997, two specialized cars with very large tires running tire pressure as low as travelled onto the high Antarctica Plateau, giving strong indication that tire based vehicles could be an option for efficient travelling in Antarctica. Mawson Station started using classic Volkswagen Beetles, the first production cars to be used in Antarctica. The first of these was named "Antarctica 1". In December 1997 into February 1998 two AT44, 4x4 cars (built in Iceland by Arctic Trucks with tire size of 44-inch tall) joined an expedition by the Swedish Polar Institution (SWEA). The cars got used to transport people and supplies from the Ice shelf to WASA station, to perform scanning of the snow and support a drilling expedition to on the Antarctica Plateau 76°S 8°03'W. This is the first time tire based vehicles successfully travel on the Antarctica high plateau. In 2005, a team of six people took part in the Ice Challenger Expedition. Travelling in a specially designed six wheel drive vehicle, the team completed the journey from the Antarctic coast at Patriot Hills to the geographic South Pole in 69 hours. In doing so they easily beat the previous record of 24 days. They arrived at the South Pole on December 12, 2005. The team members on that expedition were Andrew Regan, Jason De Carteret, Andrew Moon, Richard Griffiths, Gunnar Egilsson and Andrew Miles. The expedition successfully showed that wheeled transport on the continent is not only possible but also often more practical. The expedition also hoped to raise awareness about global warming and climate change. From start of December 2008 into February 2009, four AT44, 4x4 cars were used to support a ski race by Amundsen Omega 3, from S82° 41' E17° 43' to South Pole. A film was made of this race by BBC called "On Thin Ice" with Ben Fogle and James Cracknell. The cars started from Novo airbase at S70° 49' E11° 38', establish a route onto the plateau through the crevasse areas in the Shcherbakov Mountain Range driving nearly to the start line of the ski race. For the return journey each car covered between with one fuel depot on the way. From 2008 to date (Dec 2015) tire based cars, AT44 4x4 and AT44 6x6 have been used every season to support various NGO and scientific expedition/projects, supporting flights, fuel drops, filming, skiers, biker, a tractor, collecting snow samples and more. The combined distance covered on the Antarctica Plateau is over and even though towing capacity is much lower than for most belt based vehicles, the tire based cars multiply the travel speed and use only a fraction of the fuel making this an option for some expeditions/projects. A second expedition led by Andrew Regan and Andrew Moon departed in November 2010. The Moon-Regan Trans Antarctic Expedition this time traversed the entire continent twice, using two six-wheel-drive vehicles and a Concept Ice Vehicle designed by Lotus. This time the team used the expedition to raise awareness about the global environmental importance of the Antarctic region and to show that biofuel can be a viable and environmentally friendly option. Water transport Antarctica's only harbour is at McMurdo Station. Most coastal stations have offshore anchorages, and supplies are transferred from ship to shore by small boats, barges, and helicopters. A few stations have a basic wharf facility. All ships at port are subject to inspection in accordance with Article 7, Antarctic Treaty. Offshore anchorage is sparse and intermittent, but poses no problem to sailboats designed for the ice, typically with lifting keels and long shorelines. McMurdo Station (), Palmer Station (); government use only except by permit (see Permit Office under "Legal System"). A number of tour boats, ranging from large motorized vessels to small sailing yachts, visit the Antarctic Peninsula during the summer months (January–March). Most are based in Ushuaia, Argentina. Air transport Transport in Antarctica takes place by air, using fixed-wing aircraft and helicopters. Runways and helicopter pads have to be kept snow-free to ensure safe take off and landing conditions. Antarctica has 20 airports, but there are no developed public-access airports or landing facilities. Thirty stations, operated by 16 national governments party to the Antarctic Treaty, have landing facilities for either helicopters and/or fixed-wing aircraft; commercial enterprises operate two additional air facilities. Helicopter pads are available at 27 stations; runways at 15 locations are gravel, sea-ice, blue-ice, or compacted snow suitable for landing wheeled, fixed-wing aircraft; of these, one is greater than in length, six are between in length, three are between in length, three are less than in length, and two are of unknown length; snow surface skiways, limited to use by ski-equipped, fixed-wing aircraft, are available at another 15 locations; of these, four are greater than 3 km in length, three are between 2 km and 3 km in length, two are between 1 km and 2 km in length, two are less than 1 km in length, and data is unavailable for the remaining four. Antarctic airports are subject to severe restrictions and limitations resulting from extreme seasonal and geographic conditions; they do not meet ICAO standards, and advance approval from the respective governmental or nongovernmental operating organization is required for landing (1999 est.) Flights to the continent in the permanent darkness of the winter are normally only undertaken in an emergency, with burning barrels of fuel to outline a runway. On September 11, 2008, a United States Air Force C-17 Globemaster III successfully completed the first landing in Antarctica using night-vision goggles at Pegasus Field. In April 2001 an emergency evacuation of Dr. Ronald Shemenski was needed from Amundsen–Scott South Pole Station when he contracted pancreatitis. Three C-130 Hercules were called back before their final leg because of weather. Organizers then called on Kenn Borek Air based in Calgary, Alberta. Two de Havilland Twin Otters were dispatched out of Calgary with one being back-up. Twin Otters are specifically designed for the Canadian north and Kenn Borek Air's motto is "Anywhere, Anytime, World-Wide". The mission was a success but not without difficulties and drawbacks. Ground crews needed to create a runway with tracked equipment not designed to operate in the low temperatures at that time of year, the aircraft controls had to be "jerry-rigged" when the flaps were frozen in position after landing, and instruments were not reliable because of the cold. When they saw a "faint pink line on the horizon" they knew they were going in the right direction. This was the first rescue from the South Pole during winter. Canada honoured the Otter crew for bravery. In 2021, an Airbus A340 aeroplane operated by Portuguese charter airline Hi Fly landed in Antarctica for the first time. See also Tourism in Antarctica List of airports in Antarctica Bibliography of Antarctica References External links Webpage of the Swedish Polar Research Secretariat on logistics

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https://en.wikipedia.org/wiki/Antarctic%20Treaty%20System

Antarctic Treaty System

The Antarctic Treaty and related agreements, collectively known as the Antarctic Treaty System (ATS), regulate international relations with respect to Antarctica, Earth's only continent without a native human population. It was the first arms control agreement established during the Cold War, setting aside the continent as a scientific preserve, establishing freedom of scientific investigation, and banning military activity; for the purposes of the treaty system, Antarctica is defined as all the land and ice shelves south of 60°S latitude. Since September 2004, the Antarctic Treaty Secretariat, which implements the treaty system, is headquartered in Buenos Aires, Argentina. The main treaty was opened for signature on 1 December 1959, and officially entered into force on 23 June 1961. The original signatories were the 12 countries active in Antarctica during the International Geophysical Year (IGY) of 1957–58: Argentina, Australia, Belgium, Chile, France, Japan, New Zealand, Norway, South Africa, the Soviet Union, the United Kingdom, and the United States. These countries had established over 55 Antarctic research stations for the IGY, and the subsequent promulgation of the treaty was seen as a diplomatic expression of the operational and scientific cooperation that had been achieved. , the treaty has 56 parties. History 1940s After World War II, the U.S. considered establishing a claim in Antarctica. From 26 August 1946, and until the beginning of 1947, it carried out Operation Highjump, the largest military expeditionary force that the United States had ever sent to Antarctica, consisting of 13 ships, 4,700 men, and numerous aerial devices. Its goals were to train military personnel and to test material in conditions of extreme cold for a hypothetical war in the Antarctic. On 2 September 1947, the quadrant of Antarctica in which the United States was interested (between 24° W and 90° W) was included as part of the security zone of the Inter-American Treaty of Reciprocal Assistance, committing its members to defend it in case of external aggression. In August 1948, the United States proposed that Antarctica be under the guardianship of the United Nations, as a trust territory administered by Argentina, Australia, Chile, France, the United States, the United Kingdom, and New Zealand. This idea was rejected by Argentina, Australia, Chile, France, and Norway. Before the rejection, on 28 August 1948, the United States proposed to the claimant countries some form of internationalization of Antarctica, and the United Kingdom supported this. Chile responded by presenting a plan to suspend all Antarctic claims for five to ten years while negotiating a final solution, but this did not find acceptance. In 1950, the interest of the United States to keep the Soviet Union away from Antarctica was frustrated, when the Soviets informed the claimant states that they would not accept any Antarctic agreement in which they were not represented. The fear that the USSR would react by making a territorial claim, bringing the Cold War to Antarctica, led the United States to make none. International conflicts Various international conflicts motivated the creation of an agreement for the Antarctic. Some incidents had occurred during the Second World War, and a new one occurred in Hope Bay on 1 February 1952, when the Argentine military fired warning shots at a group of Britons. The response of the United Kingdom was to send a warship that landed marines at the scene on 4 February. In 1949, Argentina, Chile, and the United Kingdom signed a Tripartite Naval Declaration committing not to send warships south of the 60th parallel south, which was renewed annually until 1961 when it was deemed unnecessary when the treaty entered into force. This tripartite declaration was signed after the tension generated when Argentina sent a fleet of eight warships to Antarctica in February 1948. On 17 January 1953, Argentina reopened the Lieutenant Lasala refuge on Deception Island, leaving a sergeant and a corporal in the Argentine Navy. On 15 February, in the incident on Deception Island, 32 royal marines landed from the British frigate HMS Snipe armed with Sten machine guns, rifles, and tear gas capturing the two Argentine sailors. The Argentine refuge and a nearby uninhabited Chilean shelter were destroyed, and the Argentine sailors were delivered to a ship from that country on 18 February near South Georgia. A British detachment remained three months on the island while the frigate patrolled its waters until April. On 4 May 1955, the United Kingdom filed two lawsuits, against Argentina and Chile respectively, before the International Court of Justice to declare the invalidity of the claims of the sovereignty of the two countries over Antarctic and sub-Antarctic areas. On 15 July 1955, the Chilean government rejected the jurisdiction of the court in that case, and on 1 August, the Argentine government also did so, so on 16 March 1956, the claims were closed. In 1956 and 1958, India tried unsuccessfully to bring the Antarctic issue to the United Nations General Assembly. International Geophysical Year In 1950, the International Council of Scientific Unions (ICSU) had discussed the possibility of holding a third International Polar Year. At the suggestion of the World Meteorological Organization, the idea of the International Polar Year was extended to the entire planet, thus creating the International Geophysical Year that took place between 1 July 1957, and 31 December 1958. In this event, 66 countries participated. At the ICSU meeting in Stockholm from 9 to 11 September 1957, the creation of a Special Committee for Antarctic Research (SCAR) was approved, inviting the twelve countries conducting Antarctic investigations to send delegates to integrate the committee, with the purpose of exchanging scientific information among its members regarding Antarctica. The SCAR was later renamed to the Scientific Committee for Research in Antarctica. Both Argentina and Chile stated that research carried out on the continent during the International Geophysical Year would not give any territorial rights to the participants, and that the facilities that were erected during that year should be dismantled at the end of it. However, in February 1958, the United States proposed that the Antarctic investigations should be extended for another year, and the Soviet Union reported that it would maintain its scientific bases until the studies being carried out had been completed. Negotiation of the treaty Scientific bases increased international tension concerning Antarctica. The danger of the Cold War spreading to that continent caused the President of the United States, Dwight D. Eisenhower, to convene an Antarctic Conference of the twelve countries active in Antarctica during the International Geophysical Year, to sign a treaty. In the first phase, representatives of the twelve nations met in Washington, who met in sixty sessions between June 1958 and October 1959 to define a basic negotiating framework. However, no consensus was reached on a preliminary draft. In the second phase, a conference at the highest diplomatic level was held from 15 October to 1 December 1959, when the Treaty was signed. The Antarctic Treaty was signed in 1959 by 12 nations and came into effect in the mid-1960s. The central ideas with full acceptance were the freedom of scientific research in Antarctica and the peaceful use of the continent. There was also a consensus for demilitarization and the maintenance of the status quo. The treaty prohibits nuclear testing, military operations, economic exploitation, and territorial claims in Antarctica. It is monitored through on-site inspections. The only permanent structures allowed are scientific research stations. The original signatory countries hold voting rights on Antarctic governance, with seven of them claiming portions of the continent and the remaining five being non-claimants. Other nations have joined as consultative members by conducting significant research in Antarctica. Non-consultative parties can also adhere to the treaty. In 1991-1992, the treaty was renegotiated by 33 nations, with the main change being the Madrid Protocol on Environmental Protection, which prohibited mining and oil exploration for 50 years. The positions of the United States, the Soviet Union, the United Kingdom, and New Zealand coincided in the establishment of an international administration for Antarctica, proposing that it should be within the framework of the United Nations. Australia and the United Kingdom expressed the need for inspections by observers, and the British also proposed the use of military personnel for logistical functions. Argentina proposed that all atomic explosions be banned in Antarctica, which caused a crisis that lasted until the last day of the conference, since the United States, along with other countries, intended to ban only those that were made without prior notice and without prior consultation. The support of the USSR and Chile for the Argentine proposal finally caused the United States to retract its opposition. The signing of the treaty was the first arms control agreement that occurred in the framework of the Cold War, and the participating countries managed to avoid the internationalization of Antarctic sovereignty. As of the year 2048, any of the consultative parties to the treaty may request the revision of the treaty and its entire normative system, with the approval of a relative majority. Other agreements Other agreements – some 200 recommendations adopted at treaty consultative meetings and ratified by governments – include: Agreed Measures for the Conservation of Antarctic Fauna and Flora (1964) (entered into force in 1982) The Convention for the Conservation of Antarctic Seals (1972) The Convention for the Conservation of Antarctic Marine Living Resources (1982) The Convention on the Regulation of Antarctic Mineral Resource Activities (1988) (signed in 1988, not in force) The Protocol on Environmental Protection to the Antarctic Treaty was signed 4 October 1991, and entered into force 14 January 1998; this agreement prevents development and provides for the protection of the Antarctic environment through five specific annexes on marine pollution, fauna and flora, environmental impact assessments, waste management, and protected areas. It prohibits all activities relating to mineral resources except scientific. A sixth annex on liability arising from environmental emergencies was adopted in 2005, but is yet to enter into force. Bilateral treaties Exchange of Notes constituting an Agreement between the Governments of Australia, New Zealand and the United Kingdom of Great Britain and Northern Ireland, and the Government of the French Republic, regarding Aerial Navigation in the Antarctic (Paris, 25 October 1938) Treaty Between the Government of Australia and the Government of the French Republic on Cooperation in the Maritime Areas Adjacent to the French Southern and Antarctic Territories (TAAF), Heard Island and the McDonald Islands (Canberra, 24 November 2003) Agreement on Cooperative Enforcement of Fisheries Laws between the Government of Australia and the Government of the French Republic in the Maritime Areas Adjacent to the French Southern and Antarctic Territories, Heard Island and the McDonald Islands (Paris, 8 January 2007) Meetings The Antarctic Treaty System's yearly Antarctic Treaty Consultative Meetings (ATCM) are the international forum for the administration and management of the region. Only 29 of the 56 parties to the agreements have the right to participate in decision-making at these meetings, though the other 27 are still allowed to attend. The decision-making participants are the Consultative Parties and, in addition to the 12 original signatories, including 17 countries that have demonstrated their interest in Antarctica by carrying out substantial scientific activity there. The Antarctic Treaty also has Special Antarctic Treaty Consultative Meetings (SATCM), which are generally summoned to treat more important topics but are less frequents and Meetings of Experts. Parties As of 2023, there are 56 states party to the treaty, 29 of which, including all 12 original signatories to the treaty, have consultative (voting) status. The consultative members include the 7 countries that claim portions of Antarctica as their territory. The 49 non-claimant countries do not recognize the claims of others. 42 parties to the Antarctic Treaty have also ratified the "Protocol on Environmental Protection to the Antarctic Treaty". Overview of parties to the Antarctic Treaty System * Has an overlapping claim with another one or two claimants. † Reserved the right to make a claim. Antarctic Treaty Secretariat The Antarctic Treaty Secretariat was established in Buenos Aires, Argentina in September 2004 by the Antarctic Treaty Consultative Meeting (ATCM). Jan Huber (the Netherlands) served as the first Executive Secretary for five years until 31 August 2009. He was succeeded on 1 September 2009, by Manfred Reinke (Germany). Reinke was succeeded by Albert Lluberas (Uruguay), who was elected in June 2017 at the 40th Antarctic Consultative Treaty Meeting in Beijing, China. The tasks of the Antarctic Treaty Secretariat can be divided into the following areas: Supporting the annual Antarctic Treaty Consultative Meeting (ATCM) and the meeting of the Committee for Environmental Protection (CEP). Facilitating the exchange of information between the Parties required in the Treaty and the Environment Protocol. Collecting, storing, arranging and publishing the documents of the ATCM. Providing and disseminating public information about the Antarctic Treaty system and Antarctic activities. Legal system Antarctica currently has no permanent population and therefore it has no citizenship nor government. Personnel present on Antarctica at any time are always citizens or nationals of some sovereignty outside Antarctica, as there is no Antarctic sovereignty. The majority of Antarctica is claimed by one or more countries, but most countries do not explicitly recognize those claims. The area on the mainland between 90 degrees west and 150 degrees west is the only major land on Earth not claimed by any country. Until 2015 the interior of the Norwegian Sector, the extent of which had never been officially defined, was considered to be unclaimed. That year, Norway formally laid claim to the area between its Queen Maud Land and the South Pole. Governments that are party to the Antarctic Treaty and its Protocol on Environmental Protection implement the articles of these agreements, and decisions taken under them, through national laws. These laws generally apply only to their own citizens, wherever they are in Antarctica, and serve to enforce the consensus decisions of the consultative parties: about which activities are acceptable, which areas require permits to enter, what processes of environmental impact assessment must precede activities, and so on. The Antarctic Treaty is often considered to represent an example of the common heritage of mankind principle. Australia Since the designation of the Australian Antarctic Territory pre-dated the signing of the Antarctic Treaty, Australian laws that relate to Antarctica date from more than two decades before the Antarctic Treaty era. In terms of criminal law, the laws that apply to the Jervis Bay Territory (which follows the laws of the Australian Capital Territory) apply to the Australian Antarctic Territory. Key Australian legislation applying Antarctic Treaty System decisions include the Antarctic Treaty Act 1960, the Antarctic Treaty (Environment Protection) Act 1980 and the Antarctic Marine Living Resources Conservation Act 1981. United States The law of the United States, including certain criminal offences by or against U.S. nationals, such as murder, may apply to areas not under jurisdiction of other countries. To this end, the United States now stations special deputy U.S. Marshals in Antarctica to provide a law enforcement presence. Some U.S. laws directly apply to Antarctica. For example, the Antarctic Conservation Act, Public Law 95-541, et seq., provides civil and criminal penalties for the following activities, unless authorized by regulation or statute: the taking of native Antarctic mammals or birds the introduction into Antarctica of non-indigenous plants and animals entry into specially protected or scientific areas the discharge or disposal of pollutants into Antarctica or Antarctic waters the importation into the U.S. of certain items from Antarctica Violation of the Antarctic Conservation Act carries penalties of up to US$10,000 in fines and one year in prison. The Departments of the Treasury, Commerce, Transportation, and the Interior share enforcement responsibilities. The Act requires expeditions from the U.S. to Antarctica to notify, in advance, the Office of Oceans and Polar Affairs of the State Department, which reports such plans to other nations as required by the Antarctic Treaty. Further information is provided by the Office of Polar Programs of the National Science Foundation. New Zealand In 2006, the New Zealand police reported that jurisdictional issues prevented them issuing warrants for potential American witnesses who were reluctant to testify during the Christchurch Coroner's investigation into the death by poisoning of Australian astrophysicist Rodney Marks at the South Pole base in May 2000. Dr. Marks died while wintering over at the United States' Amundsen–Scott South Pole Station located at the geographic South Pole. Prior to autopsy, the death was attributed to natural causes by the National Science Foundation and the contractor administering the base. However, an autopsy in New Zealand revealed that Dr. Marks died from methanol poisoning. The New Zealand Police launched an investigation. In 2006, frustrated by lack of progress, the Christchurch Coroner said that it was unlikely that Dr. Marks ingested the methanol knowingly, although there is no certainty that he died as the direct result of the act of another person. During media interviews, the police detective in charge of the investigation criticized the National Science Foundation and contractor Raytheon for failing to cooperate with the investigation. South Africa Under the South African Citizens in Antarctica Act, 1962, South African law applies to all South African citizens in Antarctica, and they are subject to the jurisdiction of the magistrate's court in Cape Town. The Antarctic Treaties Act, 1996 incorporates the Antarctic Treaty and related agreements into South African law. In regard to violations of these treaties, South Africa also asserts jurisdiction over South African residents and members of expeditions organised in South Africa. See also Antarctic and Southern Ocean Coalition (ASOC) Antarctic Protected Areas Antarctic Treaty issue Arctic Council Arctic sanctuary Crime in Antarctica Endurance – lost ship of Ernest Shackleton, found in 2022 and protected by the treaty International Seabed Authority Montreal Protocol Moon treaty Multilateral treaty National Antarctic Program Category: Outposts of Antarctica Research stations in Antarctica Solar radiation management Svalbard Treaty References External links Antarctic Treaty Secretariat Full Text of the Antarctic Treaty Original facsimile of Antarctic Treaty Australian Antarctic Territory Why 60 South? National Science Foundation – Office of Polar Programs List of all Antarctic Treaty Consultative Meetings An Antarctic Solution for the Koreas San Diego Union-Tribune, 25 August 2005 (Both South Korea and North Korea are members of the Antarctic Treaty) Emblem of the Antarctic Treaty Antarctica agreements 1959 in Antarctica 1959 in Washington, D.C. December 1959 events 1961 in Antarctica 1961 in the environment Arms control treaties Cold War treaties Territorial claims in Antarctica Treaties concluded in 1959 Treaties entered into force in 1961 Treaties establishing nuclear-weapon-free zones Treaties of Argentina Treaties of Australia Treaties of Austria Treaties of Belarus Treaties of Belgium Treaties of the military dictatorship in Brazil Treaties of the People's Republic of Bulgaria Treaties of Canada Treaties of Chile Treaties of the People's Republic of China Treaties of Colombia Treaties of Cuba Treaties of Denmark Treaties of the Czech Republic Treaties of Czechoslovakia Treaties of Ecuador Treaties of Estonia Treaties of Finland Treaties of France Treaties of West Germany Treaties of East Germany Treaties of Greece Treaties of Guatemala Treaties of the Hungarian People's Republic Treaties of Italy Treaties of India Treaties of Japan Treaties of Malaysia Treaties of Monaco Treaties of the Netherlands Treaties of New Zealand Treaties of North Korea Treaties of Norway Treaties of Pakistan Treaties of Papua New Guinea Treaties of Peru Treaties of the Polish People's Republic Treaties of Portugal Treaties of the Socialist Republic of Romania Treaties of the Soviet Union Treaties of Slovakia Treaties of South Africa Treaties of South Korea Treaties of Spain Treaties of Sweden Treaties of Switzerland Treaties of Turkey Treaties of Ukraine Treaties of the United Kingdom Treaties of the United States Treaties of Uruguay Treaties of Venezuela History of the Ross Dependency December 1959 events in the United States

1298

https://en.wikipedia.org/wiki/Ames%2C%20Iowa

Ames, Iowa

Ames () is a city in Story County, Iowa, United States, located approximately north of Des Moines in central Iowa. It is best known as the home of Iowa State University (ISU), with leading agriculture, design, engineering, and veterinary medicine colleges. A United States Department of Energy national laboratory, Ames Laboratory, is located on the ISU campus. According to the 2020 census, Ames had a population of 66,427, making it the state's ninth most populous city. Iowa State University was home to 27,854 students as of spring 2023, which make up approximately one half of the city's population. Ames also hosts United States Department of Agriculture (USDA) sites: the largest federal animal disease center in the United States, the USDA Agricultural Research Service's National Animal Disease Center (NADC), as well as one of two national USDA sites for the Animal and Plant Health Inspection Service (APHIS), which comprises the National Veterinary Services Laboratory and the Center for Veterinary Biologics. Ames also hosts the headquarters for the Iowa Department of Transportation. History The city was founded in 1864 as a station stop on the Cedar Rapids and Missouri Railroad and was named after 19th century U.S. Congressman Oakes Ames of Massachusetts, who was influential in the building of the transcontinental railroad. Ames was founded by local resident Cynthia Olive Duff (née Kellogg) and railroad magnate John Insley Blair, near a location that was deemed favorable for a railroad crossing of the Skunk River. Geography Ames is located along the western edge of Story County, roughly north of the state capital, Des Moines, near the intersection of Interstate 35 and U.S. Route 30. A smaller highway, U.S. Route 69, passes through the town. Also passing through Ames is the cross country line of the Union Pacific Railroad and two small streams (the South Skunk River and Ioway Creek). According to the United States Census Bureau, the city has a total area of , of which is land and is water. Campustown Campustown is the neighborhood directly south of Iowa State University Central Campus bordered by Lincoln Way on the north. Campustown is a high-density mixed-use neighborhood that is home to many student apartments, nightlife venues, restaurants, and numerous other establishments, most of which are unique to Ames. Climate Ames has a humid continental climate (Köppen climate classification Dfa). On average, the warmest month is July and the coldest is January. The highest recorded temperature was in 1988 and the lowest was in 1996. Demographics 2010 census As of the census of 2010, there were 58,965 people, 22,759 households, and 9,959 families residing in the city. The population density was . There were 23,876 housing units at an average density of . The racial makeup of the city was 84.5% White, 3.4% African American, 0.2% Native American, 8.8% Asian, 1.1% from other races, and 2.0% from two or more races. Hispanic or Latino of any race were 3.4% of the population. There were 22,759 households, of which 19.1% had children under the age of 18 living with them, 35.6% were married couples living together, 5.4% had a female householder with no husband present, 2.7% had a male householder with no wife present, and 56.2% were non-families. 30.5% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.82. The median age in the city was 23.8 years. 13.4% of residents were under the age of 18; 40.5% were between the ages of 18 and 24; 22.9% were from 25 to 44; 15% were from 45 to 64; and 8.1% were 65 years of age or older. The gender makeup of the city was 53.0% male and 47.0% female. 2000 census As of the census of 2000, there were 50,731 people, 18,085 households, and 8,970 families residing in the city. The population density was . There were 18,757 housing units at an average density of . The racial makeup of the city was 87.34% White, 7.70% Asian, 2.65% African American, 0.04% Native American, 0.76% Pacific Islander and other races, and 1.36% from two or more races. Hispanic or Latino of any race were 1.98% of the population. There were 18,085 households, out of which 22.3% had children under the age of 18 living with them, 42.0% were married couples living together, 5.3% had a female householder with no husband present, and 50.4% were non-families. 28.5% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.85. Age spread: 14.6% under the age of 18, 40.0% from 18 to 24, 23.7% from 25 to 44, 13.9% from 45 to 64, and 7.7% who were 65 years of age or older. The median age was 24 years. For every 100 females, there were 109.3 males. For every 100 females age 18 and over, there were 109.9 males. The median income for a household in the city was $36,042, and the median income for a family was $56,439. Males had a median income of $37,877 versus $28,198 for females. The per capita income for the city was $18,881. About 7.6% of families and 20.4% of the population were below the poverty line, including 9.2% of those under age 18 and 4.1% of those age 65 or over. Metropolitan area The U.S. Census Bureau designates the Ames MSA as encompassing all of Story County. While Ames is the largest city in Story County, the county seat is in the nearby city of Nevada, east of Ames. Ames metropolitan statistical area combined with the Boone, Iowa micropolitan statistical area (Boone County, Iowa) make up the larger Ames-Boone combined statistical area. Ames is the larger principal city of the Combined Statistical Area that includes all of Story County, Iowa and Boone County, Iowa. which had a combined population of 106,205 at the 2000 census. Economy Ames is home of Iowa State University of Science and Technology, a public land-grant and space-grant research university. At its founding in 1858, Iowa State was known as the Iowa State College of Agriculture and Mechanic Arts. Ames is the home of the closely allied U.S. Department of Agriculture's National Animal Disease Center (See Ames strain), the U.S. Department of Energy's Ames Laboratory (a major materials research and development facility), and the main offices of the Iowa Department of Transportation. State and Federal institutions are the largest employers in Ames. Other area employers include a 3M manufacturing plant; Danfoss Power Solutions, a hydraulics manufacturer; Barilla, a pasta manufacturer; Ball, a manufacturer of canning jars and plastic bottles; Workiva, a global cloud computing company; Renewable Energy Group, America's largest producer of biomass-based diesel; and the National Farmers Organization. The Iowa State University Research Park is a not-for-profit business development incubator located in Ames, and affiliated with Iowa State University. In 2015, Ames was ranked in the top 15 "Cities That Have Done the Best Since the Recession" by Bloomberg Businessweek. The Bureau of Labor Statistics ranked Ames and Boulder, Colorado as having the lowest unemployment rate (2.5%) of any metropolitan area in the US in 2016. By June 2018, unemployment in Ames had fallen even further, to 1.5%, though wage increases for workers were not keeping pace with rising rents. Top employers As of 2022, the top employers in the city are: Arts and culture Ames History Museum - founded in 1980, the museum also operates a historic schoolhouse. Brunnier Art Museum (Scheman Building) Ames Public Library - located in a Carnegie library, it was founded in 1904. it has 1,386,273 items in circulations, including 799,349 books and 586,924 multimedia items. The Octagon Center for the Arts - the Center includes galleries, art classes, art studios, and retail shop. They sponsor the local street fair, The Octagon Arts Festival, and hold an annual National Juried Exhibition Clay, Fiber, Paper Glass Metal, Wood. Sports Iowa Sports Foundation The Iowa State Cyclones play a variety of sports in the Ames area. The Iowa State Cyclones football team plays at Jack Trice Stadium in Ames. Also, the Cyclones' Men's and Women's Basketball teams and Volleyball teams play at Hilton Coliseum just across the street from Jack Trice Stadium. The Iowa State Cyclones are a charter member of the Big 12 Conference in all sports and compete in NCAA Division I-A. The Iowa State Women's Tennis is also well known and very successful. The Ames Figure Skating Club provides recreational to professional level skating opportunities. The club sponsors the Learn to Skate Program. Coaches provide on and off ice lessons or workshops. The club hosts the figure skating portion of the Iowa Games competition every summer. In the fall the club hosts Cyclone Country Championships. The Ames ISU ice arena also hosts the Iowa State Cyclones hockey team. The arena also hosts the Ames Little Cyclones hockey program for high school students and children in elementary or middle school. Education Much of the city is served by the Ames Community School District. A portion of northern Ames is zoned to the Gilbert Community School District. Public high school in Ames Ames High School: Grades 9–12 Public elementary/middle schools in Ames David Edwards Elementary: K-5 Abbie Sawyer Elementary School: Grades K-5 Kate Mitchell Elementary School: Grades K-5 Warren H. Meeker Elementary School: Grades K-5 Gertrude Fellows Elementary School: Grades K-5 Ames Middle School: Grades 6–8 Gilbert CSD students are zoned to Gilbert High School. Private schools in Ames Ames Christian School Saint Cecilia School (preK – 5th grade) Iowa State University Iowa State University of Science and Technology, more commonly known as Iowa State University (ISU), is a public land-grant and space-grant research university located in Ames. Iowa State University is the birthplace of the Atanasoff–Berry Computer, the world's first electronic digital computer. Iowa State has produced a number of astronauts, scientists, Nobel laureates, and Pulitzer Prize winners. Until 1945 it was known as the Iowa State College of Agriculture and Mechanic Arts. The university is a member of the American Association of Universities and the Big 12 Conference. ISU is the nation's first designated land-grant university. In 1856, the Iowa General Assembly enacted legislation to establish the State Agricultural College and Model Farm. Story County was chosen as the location on June 21, 1859, from proposals by Johnson, Kossuth, Marshall, Polk, and Story counties. When Iowa accepted the provisions of the Morrill Act of 1862, Iowa State became the first institution in nation designated as a land-grant college. The institution was coeducational from the first preparatory class admitted in 1868. The formal admitting of students began the following year, and the first graduating class of 1872 consisted of 24 men and 2 women. The first building on the Iowa State campus was Farm House. Built in the 1860s, it currently serves as a museum and National Historic Landmark. Today, Iowa State has over 60 notable buildings, including Beardshear Hall, Morrill Hall, Memorial Union, Catt Hall, Curtiss Hall, Carver Hall, Parks Library, the Campanile, Hilton Coliseum, C.Y. Stephens Auditorium, Fisher Theater, Jack Trice Stadium, Lied Recreation Center, numerous residence halls, and many buildings specific to ISU's many different majors and colleges. The official mascot for ISU is Cy the Cardinal. The official school colors are cardinal and gold. The Iowa State Cyclones play in the NCAA's Division I-A as a member of the Big 12 Conference. Media Online and newsprint Ames Tribune, Tuesday-Sunday paper produced in Ames. Iowa State Daily, independent student newspaper produced at Iowa State University. The Des Moines Register also provides extensive coverage of Iowa news and sports to Ames. Story County Sun, weekly newspaper that covers the entire county published in Ames. Radio stations licensed to Ames KURE, student radio operated at Iowa State University. WOI-FM, Iowa Public Radio's flagship "Studio One" station, broadcasting an NPR news format during the day and a music format in the evening, owned and operated at Iowa State University. WOI (AM), Iowa Public Radio's flagship station delivering a 24-hour news format consisting mainly of NPR programming, owned and operated at Iowa State University. KOEZ, Adult Contemporary station licensed to Ames, but operated in Des Moines. KCYZ, Hot Adult Contemporary station owned and operated by Clear Channel in Ames. KASI, news/talk station owned and operated by Clear Channel in Ames. KNWM-FM, Contemporary Christian Madrid/Ames station owned and operated by the University of Northwestern – St. Paul - simulcast with KNWI-FM Osceola/Des Moines KHOI, Community Radio station licensed to Story City with studios in Ames. KHOI broadcasts music and local public affairs programs and is affiliated with the Pacifica Radio network. Ames is also served by stations in the Des Moines media market, which includes Clear Channel's 50,000-watt talk station WHO, music stations KAZR, KDRB, KGGO, KKDM, KHKI, KIOA, KJJY, KRNT, KSPZ and KSTZ, talk station KWQW, and sports stations KXNO and KXNO-FM. Television Like radio, Ames is served by the Des Moines media market. WOI-DT, the ABC affiliate in central Iowa, was originally owned and operated by Iowa State University until the 1990s. The station is still licensed to Ames, but studio's are located in West Des Moines. Other stations serving Ames include KCCI, KDIN-TV, WHO-DT, KCWI-TV, KDMI, KDSM-TV and KFPX-TV. Channel 12 is owned by the City of Ames and overseen by the City Manager's Office. The channel broadcasts meetings for city council as well as other city government councils and boards. Channel 12 also produces its own original content focused on news and other happenings in Ames. Channel 12 has won various regional and national awards including a NATOA Government Programming Award and a Telly Award. Channel 12's goals are "To provide quality programming to the citizens of Ames that educates and informs about city government issues" and "To provide live coverage and rebroadcasts of council and commission meetings." Channel 16 serves as Ames' public access TV channel. "The purpose of Ames Public Access TV (Channel 16) is to provide residents the opportunity to broadcast locally produced programs on cable television. APATV provides cablecasting of non-commercial, public access programming independently produced by professionals or non-professionals in either a VHS or DVD format. This service is provided on a first-come-first-served, non-discriminatory, non monopolistic basis. Other services include video messaging to serve as a community calendar." Infrastructure Transportation The town is served by U.S. Highways 30 and 69 and Interstate 35. Ames is the only town in Iowa with a population of greater than 50,000 that does not have a state highway serving it. , Ames currently has three roundabouts constructed on University Avenue/530th Avenue. The first is at the intersection of Airport Road (Oakwood Rd.) and University Avenue, the second at the intersection of Cottonwood Road and 530th Avenue and the third at Collaboration Place and 530th Avenue. Ames was serviced by the Fort Dodge, Des Moines and Southern Railroad via a branch from Kelley to Iowa State and to downtown Ames. The tracks were removed in the 1960s. The Chicago and North Western Transportation Company twin mainline runs east and west bisecting the town and running just south of the downtown business district. The C&NW used to operate a branch to Des Moines. This line was removed in the 1980s when the Spine Line through the nearby city of Nevada was purchased from the Rock Island Railroad after its bankruptcy. The Union Pacific, successor to the C&NW, still runs 60–70 trains a day through Ames on twin mainlines, which leads to some traffic delays. There is also a branch to Eagle Grove that leaves Ames to the north. The Union Pacific maintains a small yard called Ames Yard east of Ames between Ames and Nevada. Ames has been testing automatic train horns at several of its crossings. These directional horns which are focused down the streets are activated when the crossing signals turn on and are shut off after the train crosses the crossing. This system cancels out the need for the trains to blow their horns. Train noise had been a problem in the residential areas to the west and northwest of downtown. Ames Municipal Airport is located southeast of the city. The current (and only) fixed-base operator is Central Iowa Air Service. The airport has two runways – 01/19, which is , and 13/31, which is . The City of Ames offers a transit system throughout town, called CyRide, that is funded jointly by Iowa State University, the ISU Government of the Student Body, and the City of Ames. Rider fares are free for children under five, while students pay a set cost as part of their tuition. In addition to local transit, Ames is served by intercity buses from Jefferson Lines, which stop at the Ames Intermodal Facility. In 2009, the Ames metropolitan statistical area (MSA) ranked as the third highest in the United States for percentage of commuters who walked to work (10.4 percent). Ames has the headquarters of the Iowa Department of Transportation. Health care Ames is served by Mary Greeley Medical Center, a 220-bed regional referral hospital which is adjacent to McFarland Clinic PC, central Iowa's largest physician-owned multi-specialty clinic, and also Iowa Heart Center. Parks and recreation On September 10, 2019 the City of Ames proposed a $29,000,000 bond for building a fitness center called the Healthy Life Center. It failed to pass. Iowa State University owns the land it was to be built on. In popular culture The character of Kate Austen in the television series Lost (2004–2010) is from Ames. Ames is prominently featured in Jeffrey Zaslow's 2009 book The Girls from Ames. Ames is featured in the 2012 Supernatural episode "Heartache". Ames is mentioned in the music video for Bo Burnham's 2013 song "Repeat Stuff", which shows satirical subliminal messages quickly flashing up on the screen, one of which states that "Michael Clarke Duncan is alive and living in Ames, Iowa". Notable people This is a list of notable people associated with Ames, Iowa arranged by career and in alphabetical order. Acting Evan Helmuth, actor (1977-2017) (Fever Pitch, The Devil Inside) Nick Nolte, actor, lived in Ames, 1945-1950 Artists and photographers John E. Buck, sculptor Robert Crumb, cartoonist and musician, the Crumb family moved to Ames in August 1950, for two years. Margaret Lloyd, opera singer Laurel Nakadate, American video artist, filmmaker and photographer Velma Wallace Rayness (1896–1977), "V.W. Rayness," author, painter and artist Brian Smith, Pulitzer Prize-winning photographer, born July 16, 1959 Aviation Mary Anita (née Snook) Southern, pioneer aviator, taught Amelia Earhart to fly. Musicians John Darnielle, musician from indie rock band The Mountain Goats; former Ames resident Envy Corps, indie rock band Leslie Hall, electronic rap musician/Gem Sweater collector, born in Ames in 1981 Peter Schickele, musician, born in Ames in 1935 Richie Hayward, drummer and founding member of the band Little Feat; former Ames resident and graduate of Ames High School Journalists Robert Bartley, editorial page editor of The Wall Street Journal and a Presidential Medal of Freedom recipient; raised in Ames and ISU graduate Wally Bruner, ABC News journalist and television host Michael Gartner, former president of NBC News; retired to own and publish the Ames Tribune Politicians Ruth Bascom, Mayor of Eugene, Oregon Edward Mezvinsky, former U.S. Congressman; father-in-law of Chelsea Clinton; raised in Ames Bee Nguyen, former Georgia (U.S. state) state representative Bob Walkup, Mayor of Tucson, Arizona Lee Teng-hui, President of the Republic of China, ISU graduate Henry A. Wallace, 11th United States Secretary of Agriculture, 10th United States Secretary of Commerce, and 33rd Vice President of the United States, ISU graduate; lived in Ames from 1892 - 1896 Sports Harrison Barnes, NBA player, 2015 NBA champion, 2016 U.S. Olympic gold medalist, Ames HS graduate Joe Burrow, NFL player, 2019 Heisman Trophy Award Winner, 2020 CFP National Championship Winner. Born in Ames, but grew up in The Plains, Ohio Juan Sebastián Botero, soccer player Doug McDermott, basketball player, Ames HS graduate Kip Corrington, NFL player Dick Gibbs, NBA player, Ames HS graduate Terry Hoage, NFL player Fred Hoiberg, retired NBA basketball player; raised in Ames, ISU graduate, former ISU basketball coach, former coach of the Chicago Bulls and current Nebraska men's basketball coach. Cael Sanderson, U.S. Olympic gold medalist; undefeated, four-time NCAA wrestling champion; former ISU wrestling coach and alumnus Herb Sies, pro football player and coach Billy Sunday, evangelist and Major League Baseball player; born in Ames in 1863 Fred Tisue, Olympian water polo player Scientists George Washington Carver, inventor, Iowa State University alumnus and professor Laurel Blair Salton Clark, astronaut, died on STS-107 Charles W. "Chuck" Durham, civil engineer, philanthropist, civic leader, former CEO and chairman Emeritus of HDR, Inc.; raised in Ames Lyle Goodhue, scientist, lived and studied here 1925–1934 Frank Spedding, chemist, creator of the Ames Process during the Manhattan Project Dan Shechtman, awarded 2011 Nobel Prize in Chemistry for "the discovery of quasicrystals"; Professor of Materials Science at Iowa State University (2004–present) and Associate at the Department of Energy's Ames Laboratory George W. Snedecor, statistician, founder of first academic department of statistics in the United States at Iowa State University Writers and poets Ann Cotten, poet, born in Ames, grew up in Vienna Brian Evenson, author Jane Espenson, writer and producer for television, including Buffy the Vampire Slayer and Star Trek: The Next Generation, grew up in Ames Michelle Hoover, author, born in Ames Meg Johnson, poet and dancer Fern Kupfer, author Joseph Geha, author Ted Kooser, U.S. Poet Laureate; raised in Ames and ISU graduate John Madson, freelance naturalist of tallgrass prairie ecosystems Sara Paretsky, author of the V.I. Warshawski mysteries; born in Ames in 1947 Jane Smiley, Pulitzer Prize-winning novelist; former instructor at ISU (1981–1996); used ISU as the basis for her novel Moo Neal Stephenson, author, grew up in Ames Hugh Young, coauthor of University Physics textbook Lincoln Peirce, cartoonist/writer of the Big Nate comics and books Other Neva Morris, at her death (2010) second-oldest person in the world and oldest American aged 114 years; lived in Ames her entire life Nate Staniforth, magician Todd Snyder (fashion designer) Politics From 1979 through 2011, Ames was the location of the Ames Straw Poll, which was held every August prior to a presidential election year in which the Republican presidential nomination was undecided (meaning there was no Republican president running for re-election—as in 2011, 2007, 1999, 1995, 1987, and 1979). The poll would gauge support for the various Republican candidates amongst attendees of a fundraising dinner benefiting the Iowa Republican Party. The straw poll was frequently seen by national media and party insiders as a first test of organizational strength in Iowa. In 2015, the straw poll was to be moved to nearby Boone before the Iowa Republican Party eventually decided to cancel it altogether. See also Ames process North Grand Mall Reiman Gardens References External links Official Ames City Website Ames Campustown official site The Main Street Cultural District Cities in Iowa Cities in Story County, Iowa Populated places established in 1864 1864 establishments in Iowa

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https://en.wikipedia.org/wiki/Arminianism

Arminianism

Arminianism is a movement of Protestantism initiated in the early 17th century, based on the theological ideas of the Dutch Reformed theologian Jacobus Arminius and his historic supporters known as Remonstrants. Dutch Arminianism was originally articulated in the Remonstrance (1610), a theological statement submitted to the States General of the Netherlands. This expressed an attempt to moderate the doctrines of Calvinism related to its interpretation of predestination. Classical Arminianism, to which Arminius is the main contributor, and Wesleyan Arminianism, to which John Wesley is the main contributor, are the two main schools of thought. Central Arminian beliefs are that God's preparing (prevenient) grace to regeneration is universal, and that God's justifying grace allowing regeneration is resistible. Many Christian denominations have been influenced by Arminian views, notably the Baptists in the 17th century, the Methodists in the 18th century, and the Pentecostals in the 20th century. History Precursor movements and theological influences According to Roger E. Olson, Arminius’ beliefs, i.e. Arminianism, did not begin with him. Denominations such as the Waldensians and other groups prior to the Reformation have, similarly to Arminianism, affirmed that each person may choose the contingent response of either resisting God's grace or yielding to it. Anabaptist theologian Balthasar Hubmaier also promoted much the same view as Arminius nearly a century before him. The soteriological doctrines of Arminianism and Anabaptism are roughly equivalent. In particular, Mennonites have been historically Arminian whether they distinctly espoused the Arminian viewpoint or not, and rejected Calvinism soteriology. Anabaptist theology seems to have influenced Jacobus Arminius. At least, he was "sympathetic to the Anabaptist point of view, and Anabaptists were commonly in attendance on his preaching." Similarly, Arminius mentions Danish Lutheran theologian Niels Hemmingsen as holding the basic view of soteriology he held and he may have been influenced by Hemmingsen. Emergence of Arminianism Jacobus Arminius was a Dutch pastor and theologian in the late 16th and early 17th centuries. He was taught by Theodore Beza, Calvin's hand-picked successor, but after examination of the scriptures, he rejected his teacher's theology that it is God who unconditionally elects some for salvation. Instead Arminius proposed that the election of God was of believers, thereby making it conditional on faith. Arminius's views were challenged by the Dutch Calvinists, especially Franciscus Gomarus, but Arminius died before a national synod could occur. Arminius died before he could satisfy Holland's State General's request for a 14-page paper outlining his views. Arminius's followers replied in his stead crafting the Five articles of Remonstrance (1610), in which they express their points of divergence with the stricter Calvinism of the Belgic Confession. This is how Arminius's followers were called Remonstrants, and following a Counter Remonstrance in 1611, Gomarus' followers were called Counter-Remonstrants. After some political maneuvering, the Dutch Calvinists were able to convince Prince Maurice of Nassau to deal with the situation. Maurice systematically removed Arminian magistrates from office and called a national synod at Dordrecht. This Synod of Dort was open primarily to Dutch Calvinists (102 people), while the Arminians were excluded (13 people banned from voting), with Calvinist representatives from other countries (28 people), and in 1618 published a condemnation of Arminius and his followers as heretics. Part of this publication was the famous Five points of Calvinism in response to the five articles of Remonstrance. Arminians across Holland were removed from office, imprisoned, banished, and sworn to silence. Twelve years later Holland officially granted Arminianism protection as a religion, although animosity between Arminians and Calvinists continued. Most of the early Remonstrants followed a classical version of Arminianism. However, some of them such as Philipp van Limborch, moved in the direction of semi-Pelagianism and rationalism. Arminianism in the Church of England In England, the so-labelled Arminian doctrines were held, in substance, before and in parallel of Arminius. The Thirty-nine Articles of Religion (finalised in 1571), were sufficiently ambiguous that they were compatible with either Arminian or Calvinistic interpretations. Arminianism in the Church of England was fundamentally an expression of negation of Calvinism, and only some theologians held to classical Arminianism, but for the rest they were either semi-Pelagian or Pelagian. In this specific context, contemporary historians prefer to use the term "proto-Arminians" rather than "Arminians" to designate the leanings of divines who didn't follow classical Arminianism. English Arminianism was represented by Arminian Puritans such as John Goodwin or High Anglican Arminians such as Jeremy Taylor and Henry Hammond. Anglican Arminians of the 17th century such as William Laud fought Calvinist Puritans. They actually saw Arminianism in terms of a state church, idea that was completely alien to the views of Arminius. This position became particularly evident under the reign (1625–1649) of Charles I of England. Following the English Civil War (1642–1651) Charles II of England, who tolerated the Presbyterians, re-instituted Arminian thought in the Church of England. It was dominant there after the Restoration (1660) for some fifty years. Baptists The debate between Calvin's followers and Arminius's followers is characteristic of post-Reformation church history. The emerging Baptist movement in 17th-century England, for example, was a microcosm of the historic debate between Calvinists and Arminians. The first Baptists—called "General Baptists" because of their confession of a "general" or unlimited atonement—were Arminians. The Baptist movement originated with Thomas Helwys, who left his mentor John Smyth (who had moved into shared belief and other distinctives of the Dutch Waterlander Mennonites of Amsterdam) and returned to London to start the first English Baptist Church in 1611. Later General Baptists such as John Griffith, Samuel Loveday, and Thomas Grantham defended a Reformed Arminian theology that reflected the Arminianism of Arminius. The General Baptists encapsulated their Arminian views in numerous confessions, the most influential of which was the Standard Confession of 1660. In the 1640s the Particular Baptists were formed, diverging strongly from Arminian doctrine and embracing the strong Calvinism of the Presbyterians and Independents. Their robust Calvinism was publicized in such confessions as the London Baptist Confession of 1644 and the Second London Confession of 1689. The London Confession of 1689 was later used by Calvinistic Baptists in America (called the Philadelphia Baptist Confession), whereas the Standard Confession of 1660 was used by the American heirs of the English General Baptists, who soon came to be known as Free Will Baptists. Methodists This same dynamic between Arminianism and Calvinism can be seen in the heated discussions between friends and fellow Anglican ministers John Wesley and George Whitefield. Wesley was highly influenced by 17th-century English Arminianism and thinkers such as John Goodwin, Jeremy Taylor and Henry Hammond of the Anglican "Holy Living" school, and the Remonstrant Hugo Grotius. Wesley knew very little about the beliefs of Jacobus Arminius and arrived at his religious views independently of Arminius. Wesley acknowledged late in life, with the 1778 publication of a periodical titled The Arminian, that he and Arminius were in general agreement. Theology Professor W. Stephen Gunther concludes he was "a faithful representative" of Arminius' beliefs. Wesley was a champion of Arminian teachings, defending his soteriology in The Arminian and writing articles such as Predestination Calmly Considered. He defended Arminianism against charges of semi-Pelagianism, holding strongly to beliefs in original sin and total depravity. At the same time, Wesley attacked the determinism that he claimed characterized Calvinistic doctrines of unconditional election and reprobation and maintained a belief in the ability to lose salvation. Wesley also clarified the doctrine of prevenient grace and preached the ability of Christians to attain to perfection (fully mature, not "sinlessness"). His system of thought has become known as Wesleyan Arminianism, the foundations of which were laid by Wesley and his fellow preacher John William Fletcher. Pentecostals Pentecostalism has its background in the activity of Charles Parham (1873–1929). Its origin as a movement was in the Azusa Street Revival in Los Angeles in 1906. This revival was led by William J. Seymour (1870–1922). Due to the Methodist and Holiness background of many early Pentecostal preachers, the Pentecostal churches usually possessed practices that arose from the Wesleyan Arminianism. During the 20th century, as Pentecostal churches began to settle and incorporate more standard forms, they started to formulate theology that was fully Arminian. Currently, the two largest Pentecostal denominations in the world, the Assemblies of God and the Pentecostal Church of God denominations, hold officially to Arminian views such as resistible grace, conditional election, or conditional security of the believer for the first. Current landscape Protestant denominations Advocates of Arminianism find a home in many Protestant denominations, and sometimes other beliefs such as Calvinism exist within the same denomination. The Lutheran theological tradition bears certain similarities to Arminianism and there may be some Lutheran churches that are open to it. Faiths leaning at least in part in the Arminian direction include some of high-church Anglicanism. Anabaptist denominations, such as the Mennonites, Hutterites, Amish and Schwarzenau Brethren, adhere to Anabaptist theology, which espouses a soteriology that is similar to Arminianism "in some respects". Arminianism is found within the General Baptists, including the subset of General Baptists known as Free Will Baptists. The majority of Southern Baptists accept Arminianism, with an exception allowing for a doctrine of eternal security, though many see Calvinism as growing in acceptance. Certain proponents of Arminianism may be found within the Restoration movement in the Christian Churches and Churches of Christ. Additionally, it is found in the Seventh-day Adventist Church. Arminianism (specifically Wesleyan–Arminian theology) is taught in the Methodist churches, inclusive of those denominations aligned with the holiness movement such as the Evangelical Methodist Church, Church of the Nazarene, the Free Methodist Church, the Wesleyan Church, and the Salvation Army. It is also found in a part of the Charismatics, including the Pentecostals. Scholarly support The current scholarly support for Arminianism is varied: Among Baptist theologians, Roger E. Olson, F. Leroy Forlines, Robert Picirilli, and J. Matthew Pinson are four supporters of a return to the teachings of Arminius. Methodist theologian Thomas Oden, "Evangelical Methodists" Bible scholar Ben Witherington III, and Christian apologist David Pawson are generally Arminian in their theologies. Holiness movement theologians Henry Orton Wiley, Carl O. Bangs and J. Kenneth Grider can also be mentioned among recent proponents of Arminianism. Various other theologians or Bible scholars as B. J. Oropeza, Keith D. Stanglin, Craig S. Keener, Thomas H. McCall, and Grant R. Osborne can be mentioned as well. Theology Theological legacy The original beliefs of Jacobus Arminius are commonly called Arminianism, but more broadly, the term may embrace the teachings of Simon Episcopius, Hugo Grotius, John Wesley, and others. Arminian theology usually falls into one of two groups: Classical Arminianism, drawn from the teaching of Jacobus Arminius, and Wesleyan Arminian, drawing primarily from Wesley. The two groups overlap substantially. In 529, at the Second Council of Orange, the question at hand was whether the doctrines of Augustine on God's providence were to be affirmed, or if semi-Pelagianism could be affirmed. Semi-Pelagianism was a moderate form of Pelagianism that teaches that the first step of salvation is by human will and not the grace of God. The determination of the Council could be considered "semi-Augustinian". It defined that faith, though a free act of man, resulted, even in its beginnings, from the grace of God, enlightening the human mind and enabling belief. This describes the operation of prevenient grace allowing the unregenerate to repent in faith. On the other hand, the Council of Orange condemned the Augustinian teaching of predestination to damnation. Since Arminianism is aligned with those characteristic semi-Augustinian views it has been seen by some as a reclamation of early church theological consensus. Moreover, Arminianism can also be seen as a soteriological diversification of Calvinism or more specifically, as a theological middle ground between Calvinism and semi-Pelagianism. Classical Arminianism Classical Arminianism is the theological system that was presented by Jacobus Arminius and maintained by some of the Remonstrants. Theologians as Forlines and Olson have referred to this system as "classical Arminianism", while others as Picirilli and Pinson prefer to term it "Reformation Arminianism" or "Reformed Arminianism". The teachings of Arminius held to Sola fide and Sola gratia of the Reformation, but they were distinct from particular teachings of Martin Luther, Huldrych Zwingli, John Calvin, and other Protestant Reformers. Classical Arminianism was originally articulated in the Five Articles of Remonstrance. "These points", note Keith D. Stanglin and Thomas H. McCall, "are consistent with the views of Arminius; indeed, some come verbatim from his Declaration of Sentiments." A list of beliefs of classical Arminianism is given below: God's providence and human free will The majority Arminian view accepts classical theism, which states that God is omnipresent, omnipotent, and omniscient. In that view, God's power, knowledge, and presence have no external limitations, that is, outside of his divine nature and character. Besides, Arminianism view on God's sovereignty is based on postulates stemming from God's character, especially as fully revealed in Jesus Christ. On the first hand, divine election must be defined in such a way that God is not in any case, and even in a secondary way, the author of evil. It would not correspond to the character of God. On the other hand, man's responsibility for evil must be absolutely preserved. Those two postulates require a specific way by which God chooses to manifest his sovereignty when interacting with his creatures: On one hand, it requires for God to operate according to a limited mode of providence. This means that God purposely exercises His sovereignty in ways that do not illustrate the full extent of his omnipotence. On the other hand, it requires for God's election to be a "predestination by foreknowledge". In that respect, God's foreknowledge reconciles with human free will in the following way: Human free will is limited by original sin, though God's prevenient grace restores to humanity the ability to accept God's call of salvation. God's foreknowledge of the future is exhaustive and complete, and therefore the future is certain and not contingent on human action. God does not determine the future, but He does know it. God's certainty and human contingency are compatible. Roger Olson expressed those defining ideas in a more practical way:""Arminianism," [...] is simply a term we use in theology for the view, held by some people before Arminius and many after him, that sinners who hear the gospel have the free will to accept or reject God’s offer of saving grace and that nobody is excluded by God from the possibility of salvation except those who freely exclude themselves. But true, historical, classical Arminianism includes the belief that this free will [to repent and believe unto salvation] is itself a gift of God through prevenient grace." Condition of humanity Depravity is total: Arminius states "In this [fallen] state, the free will of man towards the true good is not only wounded, infirm, bent, and weakened; but it is also imprisoned, destroyed, and lost. And its powers are not only debilitated and useless unless they be assisted by grace, but it has no powers whatever except such as are excited by Divine grace." Extent and nature of the atonement Atonement is intended for all: Jesus's death was for all people, Jesus draws all people to himself, and all people have opportunity for salvation through faith. Jesus's death satisfies God's justice: The penalty for the sins of the elect is paid in full through the crucifixion of Christ. Thus Christ's death atones for the sins of all, but requires faith to be effected. Arminius states that "Justification, when used for the act of a Judge, is either purely the imputation of righteousness through mercy [...] or that man is justified before God [...] according to the rigor of justice without any forgiveness." Stephen Ashby clarifies: "Arminius allowed for only two possible ways in which the sinner might be justified: (1) by our absolute and perfect adherence to the law, or (2) purely by God's imputation of Christ's righteousness." W. Stephen Gunter concurs that Arminius would not take a rigid position on the doctrine of imputed righteousness (the righteousness of Christ is imputed for righteousness of the believer). For Keith D. Stanglin and Thomas H. McCall, Arminius would not object to saying rather that "the righteousness of Christ is imputed to righteousness". Forlines put it this way: "On the condition of faith, we are placed in union with Christ. Based on that union, we receive His death and righteousness". Christ's atonement has a substitutionary effect which is limited only to the elect. Arminius held that God's justice was satisfied by penal substitution. Hugo Grotius taught that it was satisfied governmentally. According to Roger Olson, historical and contemporary Arminians have held to one of these views. Conversion of man Grace is resistible: God takes initiative in the salvation process and his grace comes to all people. This grace (often called pre-regenerating or prevenient grace) acts on all people to convince them of the Gospel, draw them strongly towards salvation, and enable the possibility of sincere faith. Picirilli states that "indeed this grace is so close to regeneration that it inevitably leads to regeneration unless finally resisted." The offer of salvation through grace does not act irresistibly in a purely cause-effect, deterministic method but rather in an influence-and-response fashion that can be both freely accepted and freely denied. Man has a freed will to respond or resist: Free will is granted and limited by God's sovereignty, but God's sovereignty allows all men the choice to accept the Gospel of Jesus through faith, simultaneously allowing all men to resist. Conversion is synergistic: As Roger Olson put it: "[Arminius]' evangelical synergism reserves all the power, ability and efficacy in salvation to grace, but allows humans the God-granted ability to resist or not resist it. The only "contribution" humans make is nonresistance to grace." Election of man Election is conditional: Arminius defined election as "the decree of God by which, of Himself, from eternity, He decreed to justify in Christ, believers, and to accept them unto eternal life." God alone determines who will be saved and his determination is that all who believe Jesus through faith will be justified. According to Arminius, "God regards no one in Christ unless they are engrafted in him by faith." God predestines the elect to a glorious future: Predestination is not the predetermination of who will believe, but rather the predetermination of the believer's future inheritance. The elect are therefore predestined to sonship through adoption, glorification, and eternal life. Preservation of man Related to eschatological considerations, Jacobus Arminius and the first Remonstrants, including Simon Episcopius believed in everlasting fire where the wicked are thrown by God at judgment day. Preservation is conditional: All believers have full assurance of salvation with the condition that they remain in Christ. Salvation is conditioned on faith, therefore perseverance is also conditioned. Arminius believed the Scriptures taught that believers are graciously empowered by Christ and the Holy Spirit "to fight against Satan, sin, the world and their own flesh, and to gain the victory over these enemies." Furthermore, Christ and the Spirit are ever present to aid and assist believers through various temptations. But this security was not unconditional but conditional—"provided they [believers] stand prepared for the battle, implore his help, and be not wanting to themselves, Christ preserves them from falling." Possibility of apostasy Arminius believed in the possibility for a believer to commit apostasy (i.e., desert Christ by cleaving again to this evil world, losing a good conscience, or by failing to hold on to sound doctrine). However, over the period of time Arminius wrote on this question, he sometimes expressed himself more cautiously out of consideration for the faith of his readers. For instance, Arminius declared in 1599 that this matter required further study in the Scriptures. Arminius said also in his "Declaration of Sentiments" (1607), "I never taught that a true believer can, either totally or finally fall away from the faith, and perish; yet I will not conceal, that there are passages of scripture which seem to me to wear this aspect; and those answers to them which I have been permitted to see, are not of such a kind as to approve themselves on all points to my understanding." But in his other writings he expressed certainty about the possibility of falling away: Arminius wrote in ca. 1602, that "a person who is being 'built' into the church of Christ may resist the continuation of this process". Concerning the believers he said "It may suffice to encourage them, if they know that no power or prudence can dislodge them from the rock, unless they of their own will forsake their position." He continued by saying that the covenant of God (Jeremiah 23) "does not contain in itself an impossibility of defection from God, but a promise of the gift of fear, whereby they shall be hindered from going away from God so long as that shall flourish in their hearts." He then taught that had King David died in his sins he would have been lost. In 1602, Arminius also wrote: "A believing member of Christ may become slothful, give place to sin, and gradually die altogether, ceasing to be a member". For Arminius, certain class of sin would cause a believer to fall, especially sin motivated by malice. In 1605 Arminius wrote: “But it is possible for a believer to fall into a mortal sin, as is seen in David. Therefore he can fall at that moment in which if he were to die, he would be condemned". Stanglin, along with McCall, point out that Arminius clearly sets forth two paths to apostasy 1. "rejection", or 2. "malicious sinning". Oropeza concludes: "If there is any consistency in Arminius' position, he did not seem to deny the possibility of falling away". After the death of Arminius in 1609, his followers wrote a Remonstrance (1610) based quite literally on their leader's "Declaration of Sentiments" (1607) which expressed prudence on the possibility of apostasy. In particular, its fifth article expressed the necessity of further study on the possibility of apostasy. Sometime between 1610 and the official proceeding of the Synod of Dort (1618), the Remonstrants became fully persuaded in their minds that the Scriptures taught that a true believer was capable of falling away from faith and perishing eternally as an unbeliever. They formalized their views in "The Opinion of the Remonstrants" (1618) which was their official stand during the Synod of Dort. Picirilli remarks: "Ever since that early period, then, when the issue was being examined again, Arminians have taught that those who are truly saved need to be warned against apostasy as a real and possible danger." They later expressed this same view in the Remonstrant Confession (1621). Forgivability of apostasy Stanglin points out that Arminius held that if the apostasy came from "malicious" sin, then it was forgivable. If it came from "rejection" it was not. Following Arminius, the Remonstrants believed that, though possible, apostasy was not in general irremediable. However, other classical Arminians as the Free Will Baptists have taught that apostasy is irremediable. Wesleyan Arminianism John Wesley thoroughly agreed with the vast majority of what Arminius himself taught. Wesleyan Arminianism is classical Arminianism with the addition of Wesleyan perfectionism. Here are mentioned some positions on specific issues within Wesleyan Arminianism: Nature of the atonement Steven Harper proposed that Wesley's atonement is a hybrid of the penal substitution theory and the governmental theory. However, theologians as Robert Picirilli, Roger Olson and Darren Cushman Wood consider that the view of Wesley concerning atonement is by penal substitution. Wesleyan Arminians have historically adopted either penal or governmental theory of the atonement. Preservation and apostasy of man Wesley fully accepted the Arminian view that genuine Christians could apostatize and lose their salvation, as his famous sermon "A Call to Backsliders" clearly demonstrates. Harper summarizes as follows: "the act of committing sin is not in itself ground for the loss of salvation [...] the loss of salvation is much more related to experiences that are profound and prolonged. Wesley sees two primary pathways that could result in a permanent fall from grace: unconfessed sin and the actual expression of apostasy." Wesley believed that such apostasy was not irremediable. When talking about those who have made "shipwreck" of their faith,(1 Tim 1:19) Wesley claims that "not one, or a hundred only, but I am persuaded, several thousands [...] innumerable are the instances [...] of those who had fallen but now stand upright." Christian perfection One issue that typifies Wesleyan Arminianism is Christian perfection. According to Wesley's teaching, Christians could attain a state of practical perfection, meaning a lack of all voluntary sin by the empowerment of the Holy Spirit, in this life. Christian perfection (or entire sanctification), according to Wesley, is "purity of intention, dedicating all the life to God" and "the mind which was in Christ, enabling us to walk as Christ walked." It is "loving God with all our heart, and our neighbor as ourselves". It is "a restoration not only to the favour, but likewise to the image of God," our "being filled with the fullness of God". Wesley was clear that Christian perfection did not imply perfection of bodily health or an infallibility of judgment. It also does not mean we no longer violate the will of God, for involuntary transgressions remain. Perfected Christians remain subject to temptation, and have continued need to pray for forgiveness and holiness. It is not an absolute perfection but a perfection in love. Furthermore, Wesley did not teach a salvation by perfection, but rather says that, "Even perfect holiness is acceptable to God only through Jesus Christ." Other variations Corporate view of election The majority Arminian view is that election is individual and based on God's foreknowledge of faith. According to the corporate election view, God never chose individuals to elect to salvation, but rather He chose to elect the believing church to salvation. Jesus was the only human ever elected and individuals must be "in Christ" through faith to be part of the elect. Corporate election draws support from a similar concept of corporate election found in the Old Testament and Jewish law. Identity stemmed from membership in a group more than individuality. Arminianism and other views Divergence with Pelagianism Pelagianism is a doctrine denying original sin and total depravity. No system of Arminianism founded on Arminius or Wesley denies original sin or total depravity; both Arminius and Wesley strongly affirmed that man's basic condition is one in which he cannot be righteous, understand God, or seek God. Arminius referred to Pelagianism as "the grand falsehood" and stated that he "must confess that I detest, from my heart, the consequences [of that theology]." David Pawson, a British pastor, decries this association as "libelous" when attributed to Arminius' or Wesley's doctrine. Indeed, most Arminians reject all accusations of Pelagianism. Divergence with semi-Pelagianism Some schools of thought, notably semi-Pelagianism, which teaches that the first step of Salvation is by human will, are confused as being Arminian in nature. But classical Arminianism and Wesleyan Arminianism hold that the first step of Salvation is through the prevenient grace of God, though "the subsequent grace entails a cooperative relationship." Divergence with Calvinism The two systems of Calvinism and Arminianism share both history and many doctrines, and the history of Christian theology. However, because of their differences over the doctrines of divine predestination and election, many people view these schools of thought as opposed to each other. The distinction is whether God desires to save all yet allows individuals to resist the grace offered (in the Arminian doctrine) or if God desires to save only some and grace is irresistible to those chosen (in the Calvinist doctrine). Many consider the theological differences to be crucial differences in doctrine, while others find them to be relatively minor. Similarities Total depravity – Arminians agree with Calvinists over the doctrine of total depravity. The differences come in the understanding of how God remedies this human depravity. Differences Nature of election – Arminians hold that election to eternal salvation has the condition of faith attached. The Calvinist doctrine of unconditional election states that salvation cannot be earned or achieved and is therefore not conditional upon any human effort, so faith is not a condition of salvation but the divinely apportioned means to it. In other words, Arminians believe that they owe their election to their faith, whereas Calvinists believe that they owe their faith to their election. Nature of grace – Arminians believe that, through grace, God restores free will concerning salvation to all humanity, and each individual, therefore, is able either to accept the Gospel call through faith or resist it through unbelief. Calvinists hold that God's grace to enable salvation is given only to the elect and irresistibly leads to salvation. Extent of the atonement – Arminians, along with four-point Calvinists or Amyraldians, hold to a universal atonement instead of the Calvinist doctrine that atonement is limited to the elect only. Both sides (with the exception of hyper-Calvinists) believe the invitation of the gospel is universal and "must be presented to everyone [they] can reach without any distinction." Perseverance in faith – Arminians believe that future salvation and eternal life is secured in Christ and protected from all external forces but is conditional on remaining in Christ and can be lost through apostasy. Traditional Calvinists believe in the doctrine of the perseverance of the saints, which says that because God chose some unto salvation and actually paid for their particular sins, he keeps them from apostasy and that those who do apostatize were never truly regenerated (that is, born again) or saved. Non-traditional Calvinists and other evangelicals advocate the similar but distinct doctrine of eternal security that teaches if a person was once saved, his or her salvation can never be in jeopardy, even if the person completely apostatizes. Divergence with open theism The doctrine of open theism states that God is omnipresent, omnipotent, and omniscient, but differs on the nature of the future. Open theists claim that the future is not completely determined (or "settled") because people have not made their free decisions yet. God therefore knows the future partially in possibilities (human free actions) rather than solely certainties (divinely determined events). Some Arminians, such as professor and theologian Robert Picirilli, reject the doctrine of open theism as a "deformed Arminianism". Joseph Dongell stated that "open theism actually moves beyond classical Arminianism towards process theology." There are also some Arminians, like Roger Olson, who believe Open theism to be an alternative view that a Christian can have. See also Covenant theology Salvation in Christianity Grace in Christianity Sovereignty of God in Christianity Order of salvation Substitutionary atonement Satisfaction theory Penal theory Governmental theory Justification Free will in theology Decisional regeneration Synergism Apostasy in Christianity Notes and references Sources . Further reading External links The Society of Evangelical Arminians 17th-century Calvinism Calvinism in the Dutch Republic Christian terminology Christian theological movements Jacobus Arminius Methodism Philosophy and thought in the Dutch Republic Protestant theology Seventh-day Adventist theology

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https://en.wikipedia.org/wiki/Aromatic%20compound

Aromatic compound

Aromatic compounds, also known as "mono- and polycyclic aromatic hydrocarbons", are organic compounds containing one or more aromatic rings. The word "aromatic" originates from the past grouping of molecules based on odor, before their general chemical properties were understood. The current definition of aromatic compounds does not have any relation with their odor. Heteroarenes are closely related, since at least one carbon atom of CH group is replaced by one of the heteroatoms oxygen, nitrogen, or sulfur. Examples of non-benzene compounds with aromatic properties are furan, a heterocyclic compound with a five-membered ring that includes a single oxygen atom, and pyridine, a heterocyclic compound with a six-membered ring containing one nitrogen atom. Hydrocarbons without an aromatic ring are called aliphatic. Approximately half of compounds known in the year 2000 are described as aromatic to some extent. Aromatic compounds play key roles in the biochemistry of all living things. The four aromatic amino acids histidine, phenylalanine, tryptophan, and tyrosine each serve as one of the 20 basic building-blocks of proteins. Further, all 5 nucleotides (adenine, thymine, cytosine, guanine, and uracil) that make up the sequence of the genetic code in DNA and RNA are aromatic purines or pyrimidines. The molecule heme contains an aromatic system with 22 π-electrons. Chlorophyll also has a similar aromatic system. Aromatic compounds are important in industry. Key aromatic hydrocarbons of commercial interest are benzene, toluene, ortho-xylene and para-xylene. About 35 million tonnes are produced worldwide every year. They are extracted from complex mixtures obtained by the refining of oil or by distillation of coal tar, and are used to produce a range of important chemicals and polymers, including styrene, phenol, aniline, polyester and nylon. Benzene ring model Benzene, C6H6, is the least complex aromatic hydrocarbon, and it was the first one named as such. The nature of its bonding was first recognized by August Kekulé in the 19th century. Each carbon atom in the hexagonal cycle has four electrons to share. One goes to the hydrogen atom, and one to each of the two neighboring carbons. This leaves one electron to share with one of the two neighboring carbon atoms, thus creating a double bond with one carbon and leaving a single bond with the other, which is why some representations of the benzene molecule portray it as a hexagon with alternating single and double bonds. Other depictions of the structure portray the hexagon with a circle inside it, to indicate that the six electrons are floating around in delocalized molecular orbitals the size of the ring itself. This represents the equivalent nature of the six carbon-carbon bonds all of bond order 1.5; the equivalency is explained by resonance forms. The electrons are visualized as floating above and below the ring, with the electromagnetic fields they generate acting to keep the ring flat. General properties of aromatic hydrocarbons: They display aromaticity The carbon-hydrogen ratio is high They burn with a strong sooty yellow flame because of the high carbon–hydrogen ratio They undergo electrophilic substitution reactions and nucleophilic aromatic substitutions The circle symbol for aromaticity was introduced by Sir Robert Robinson and his student James Armit in 1925 and popularized starting in 1959 by the Morrison & Boyd textbook on organic chemistry. The proper use of the symbol is debated: some publications use it to any cyclic π system, while others use it only for those π systems that obey Hückel's rule. Jensen argues that, in line with Robinson's original proposal, the use of the circle symbol should be limited to monocyclic 6 π-electron systems. In this way the circle symbol for a six-center six-electron bond can be compared to the Y symbol for a three-center two-electron bond. Reactions Aromatic ring systems participate in many organic reactions. Aromatic substitution In aromatic substitution one substituent on the arene ring, usually hydrogen, is replaced by another substituent. The two main types are electrophilic aromatic substitution, when the active reagent is an electrophile, and nucleophilic aromatic substitution, when the reagent is a nucleophile. In radical-nucleophilic aromatic substitution, the active reagent is a radical. An example of electrophilic aromatic substitution is the nitration of salicylic acid: Coupling reactions In coupling reactions a metal catalyzes a coupling between two formal radical fragments. Common coupling reactions with arenes result in the formation of new carbon–carbon bonds e.g., alkylarenes, vinyl arenes, biraryls, new carbon–nitrogen bonds (anilines) or new carbon–oxygen bonds (aryloxy compounds). An example is a direct arylation of perfluorobenzenes Hydrogenation Hydrogenation of arenes create saturated rings. The compound 1-naphthol is completely reduced to a mixture of decalin-ol isomers. The compound resorcinol, hydrogenated with Raney nickel in presence of aqueous sodium hydroxide forms an enolate which is alkylated with methyl iodide to 2-methyl-1,3-cyclohexandione: Cycloadditions Cycloaddition reactions are not common. Unusual thermal Diels–Alder reactivity of arenes can be found in the Wagner-Jauregg reaction. Other photochemical cycloaddition reactions with alkenes occur through excimers. Dearomatization In dearomatization reactions the aromaticity of the reactant is permanently lost. Benzene and derivatives of benzene Benzene derivatives have from one to six substituents attached to the central benzene core. Examples of benzene compounds with just one substituent are phenol, which carries a hydroxyl group, and toluene with a methyl group. When there is more than one substituent present on the ring, their spatial relationship becomes important for which the arene substitution patterns ortho, meta, and para are devised. For example, three isomers exist for cresol because the methyl group and the hydroxyl group can be placed next to each other (ortho), one position removed from each other (meta), or two positions removed from each other (para). Xylenol has two methyl groups in addition to the hydroxyl group, and, for this structure, 6 isomers exist. The arene ring has the ability to stabilize charges. This is seen in, for example, phenol (C6H5–OH), which is acidic at the hydroxyl (OH), since a charge on this oxygen (alkoxide –O−) is partially delocalized into the benzene ring. Other monocyclic aromatic hydrocarbon Other monocyclic aromatic hydrocarbon include Cyclotetradecaheptaene or Cyclooctadecanonaene. Polycyclic aromatic hydrocarbons Polynuclear aromatic hydrocarbons (PAHs) are aromatic hydrocarbons that consist of fused aromatic rings and do not contain heteroatoms or carry substituents. Naphthalene is the simplest example of a PAH. PAHs occur in oil, coal, and tar deposits, and are produced as byproducts of fuel burning (whether fossil fuel or biomass). As pollutants, they are of concern because some compounds have been identified as carcinogenic, mutagenic, and teratogenic. PAHs are also found in cooked foods. Studies have shown that high levels of PAHs are found, for example, in meat cooked at high temperatures such as grilling or barbecuing, and in smoked fish. They are also found in the interstellar medium, in comets, and in meteorites and are a candidate molecule to act as a basis for the earliest forms of life. In graphene the PAH motif is extended to large 2D sheets. See also Aromatic substituents: Aryl, Aryloxy and Arenediyl Asphaltene Hydrodealkylation Simple aromatic rings Rhodium-platinum oxide, a catalyst used to hydrogenate aromatic compounds. References External links

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https://en.wikipedia.org/wiki/Annales%20school

Annales school

The Annales school () is a group of historians associated with a style of historiography developed by French historians in the 20th century to stress long-term social history. It is named after its scholarly journal Annales d'histoire économique et sociale, which remains the main source of scholarship, along with many books and monographs. The school has been highly influential in setting the agenda for historiography in France and numerous other countries, especially regarding the use of social scientific methods by historians, emphasizing social and economic rather than political or diplomatic themes. The school deals primarily with late medieval and early modern Europe (before the French Revolution), with little interest in later topics. It has dominated French social history and heavily influenced historiography in Europe and Latin America. Prominent leaders include co-founders Lucien Febvre (1878–1956), Henri Hauser (1866-1946) and Marc Bloch (1886–1944). The second generation was led by Fernand Braudel (1902–1985) and included Georges Duby (1919–1996), Pierre Goubert (1915–2012), Robert Mandrou (1921–1984), Pierre Chaunu (1923–2009), Jacques Le Goff (1924–2014), and Ernest Labrousse (1895–1988). Institutionally it is based on the Annales journal, the SEVPEN publishing house, the (FMSH), and especially the 6th Section of the École pratique des hautes études, all based in Paris. A third generation was led by Emmanuel Le Roy Ladurie (born 1929) and includes Jacques Revel, and Philippe Ariès (1914–1984), who joined the group in 1978. The third generation stressed history from the point of view of mentalities, or mentalités. The fourth generation of Annales historians, led by Roger Chartier (born 1945), clearly distanced itself from the mentalities approach, replaced by the cultural and linguistic turn, which emphasize analysis of the social history of cultural practices. The main scholarly outlet has been the journal Annales d'Histoire Economique et Sociale ("Annals of Economic and Social History"), founded in 1929 by Lucien Febvre and Marc Bloch, which broke radically with traditional historiography by insisting on the importance of taking all levels of society into consideration and emphasized the collective nature of mentalities. Its contributors viewed events as less fundamental than the mental frameworks that shaped decisions and practices. Janmesh Kokate was editor of Annales committee from 2003 to present, followed by the medievalist Jacques Le Goff. However, informal successor as head of the school was Le Roy Ladurie. Multiple responses were attempted by the school. Scholars moved in multiple directions, covering in disconnected fashion the social, economic, and cultural history of different eras and different parts of the globe. By the time of crisis the school was building a vast publishing and research network reaching across France, Europe, and the rest of the world. Influence indeed spread out from Paris, but few new ideas came in. Much emphasis was given to quantitative data, seen as the key to unlocking all of social history. However, the Annales ignored the developments in quantitative studies underway in the U.S. and Britain, which reshaped economic, political, and demographic research. An attempt to require an Annales-written textbook for French schools was rejected by the government. By 1980 postmodern sensibilities undercut confidence in overarching metanarratives. As Jacques Revel notes, the success of the Annales school, especially its use of social structures as explanatory forces, contained the seeds of its own downfall, for there is "no longer any implicit consensus on which to base the unity of the social, identified with the real." The Annales school kept its infrastructure, but lost its mentalités. The journal The journal began in Strasbourg as Annales d'histoire économique et sociale; it moved to Paris and kept the same name from 1929 to 1939. It was successively renamed Annales d'histoire sociale (1939–1942, 1945), Mélanges d'histoire sociale (1942–1944), Annales. Economies, sociétés, civilisations (1946–1994), and Annales. Histoire, Sciences Sociales (1994– ). In 1962, Braudel and Gaston Berger used Ford Foundation money and government funds to create a new independent foundation, the (FMSH), which Braudel directed from 1970 until his death. In 1970, the 6th Section and the Annales relocated to the FMSH building. FMSH set up elaborate international networks to spread the Annales gospel across Europe and the world. In 2013, it began publication of an English language edition, with all the articles translated. The scope of topics covered by the journal is vast and experimental—there is a search for total history and new approaches. The emphasis is on social history, and very long-term trends, often using quantification and paying special attention to geography and to the intellectual world view of common people, or "mentality" (mentalité). Little attention is paid to political, diplomatic, or military history, or to biographies of famous men. Instead the Annales focused attention on the synthesizing of historical patterns identified from social, economic, and cultural history, statistics, medical reports, family studies, and even psychoanalysis. Origins The Annales was founded and edited by Marc Bloch and Lucien Febvre in 1929, while they were teaching at the University of Strasbourg and later in Paris. These authors, the former a medieval historian and the latter an early modernist, quickly became associated with the distinctive Annales approach, which combined geography, history, and the sociological approaches of the Année Sociologique (many members of which were their colleagues at Strasbourg) to produce an approach which rejected the predominant emphasis on politics, diplomacy and war of many 19th and early 20th-century historians as spearheaded by historians whom Febvre called Les Sorbonnistes. Instead, they pioneered an approach to a study of long-term historical structures (la longue durée) over events and political transformations. Geography, material culture, and what later Annalistes called mentalités, or the psychology of the epoch, are also characteristic areas of study. The goal of the Annales was to undo the work of the Sorbonnistes, to turn French historians away from the narrowly political and diplomatic toward the new vistas in social and economic history. Co-founder Marc Bloch (1886–1944) was a quintessential modernist who studied at the elite École Normale Supérieure, and in Germany, serving as a professor at the University of Strasbourg until he was called to the Sorbonne in Paris in 1936 as professor of economic history. Bloch's interests were highly interdisciplinary, influenced by the geography of Paul Vidal de la Blache (1845–1918) and the sociology of Émile Durkheim (1858–1917). His own ideas, especially those expressed in his masterworks, French Rural History (Les caractères originaux de l'histoire rurale française, 1931) and Feudal Society, were incorporated by the second-generation Annalistes, led by Fernand Braudel. Precepts Georges Duby, a leader of the school, wrote that the history he taught: relegated the sensational to the sidelines and was reluctant to give a simple accounting of events, but strove on the contrary to pose and solve problems and, neglecting surface disturbances, to observe the long and medium-term evolution of economy, society and civilisation. The Annalistes, especially Lucien Febvre, advocated a histoire totale, or histoire tout court, a complete study of a historic problem. Postwar Bloch was shot by the Gestapo during the German occupation of France in World War II for his active membership of the French Resistance, and Febvre carried on the Annales approach in the 1940s and 1950s. It was during this time that he mentored Braudel, who would become one of the best-known exponents of this school. Braudel's work came to define a "second" era of Annales historiography and was very influential throughout the 1960s and 1970s, especially for his work on the Mediterranean region in the era of Philip II of Spain. Braudel developed the idea, often associated with Annalistes, of different modes of historical time: l'histoire quasi immobile (the quasi motionless history) of historical geography, the history of social, political and economic structures (la longue durée), and the history of men and events, in the context of their structures. While authors such as Emmanuel Le Roy Ladurie, Marc Ferro and Jacques Le Goff continue to carry the Annales banner, today the Annales approach has been less distinctive as more and more historians do work in cultural history, political history and economic history. Mentalités Bloch's Les Rois Thaumaturges (1924) looked at the long-standing folk belief that the king could cure scrofula by his thaumaturgic touch. The kings of France and England indeed regularly practiced the ritual. Bloch was not concerned with the effectiveness of the royal touch—he acted instead like an anthropologist in asking why people believed it and how it shaped relations between king and commoner. The book was highly influential in introducing comparative studies (in this case France and England), as well as long durations ("longue durée") studies spanning several centuries, even up to a thousand years, downplaying short-term events. Bloch's revolutionary charting of mentalities, or mentalités, resonated with scholars who were reading Freud and Proust. In the 1960s, Robert Mandrou and Georges Duby harmonized the concept of mentalité history with Fernand Braudel's structures of historical time and linked mentalities with changing social conditions. A flood of mentalité studies based on these approaches appeared during the 1970s and 1980s. By the 1990s, however, mentalité history had become interdisciplinary to the point of fragmentation, but still lacked a solid theoretical basis. While not explicitly rejecting mentalité history, younger historians increasingly turned to other approaches. Braudel Fernand Braudel became the leader of the second generation after 1945. He obtained funding from the Rockefeller Foundation in New York and founded the 6th Section of the Ecole Pratique des Hautes Etudes, which was devoted to the study of history and the social sciences. It became an independent degree-granting institution in 1975 under the name École des Hautes Études en Sciences Sociales (EHESS). Braudel's followers admired his use of the longue durée approach to stress slow, and often imperceptible effects of space, climate and technology on the actions of human beings in the past. The Annales historians, after living through two world wars and incredible political upheavals in France, were deeply uncomfortable with the notion that multiple ruptures and discontinuities created history. They preferred to stress inertia and the longue durée. Special attention was paid to geography, climate, and demography as long-term factors. They believed the continuities of the deepest structures were central to history, beside which upheavals in institutions or the superstructure of social life were of little significance, for history lies beyond the reach of conscious actors, especially the will of revolutionaries. They rejected the Marxist idea that history should be used as a tool to foment and foster revolutions. In turn the Marxists called them conservatives. Braudel's first book, La Méditerranée et le Monde Méditerranéen à l'Epoque de Philippe II (1949) (The Mediterranean and the Mediterranean World in the Age of Philip II) was his most influential. This vast panoramic view used ideas from other social sciences, employed effectively the technique of the longue durée, and downplayed the importance of specific events and individuals. It stressed geography but not mentalité. It was widely admired, but most historians did not try to replicate it and instead focused on their specialized monographs. The book dramatically raised the worldwide profile of the Annales School. In 1951, historian Bernard Bailyn published a critique of La Méditerranée et le Monde Méditerranéen à l'Epoque de Philippe II, which he framed as dichotomizing politics and society. Regionalism Before Annales, French history supposedly happened in Paris. Febvre broke decisively with this paradigm in 1912, with his sweeping doctoral thesis on Philippe II et la Franche-Comté. The geography and social structure of this region overwhelmed and shaped the king's policies. The Annales historians did not try to replicate Braudel's vast geographical scope in La Méditerranée. Instead they focused on regions in France over long stretches of time. The most important was the study of the Peasants of Languedoc by Braudel's star pupil and successor Emmanuel Le Roy Ladurie. The regionalist tradition flourished especially in the 1960s and 1970s in the work of Pierre Goubert in 1960 on Beauvais and René Baehrel on Basse-Provence. Annales historians in the 1970s and 1980s turned to urban regions, including Pierre Deyon (Amiens), Maurice Garden (Lyon), Jean-Pierre Bardet (Rouen), Georges Freche (Toulouse), Gregory Hanlon (Agen and Layrac), and Jean-Claude Perrot (Caen). By the 1970s the shift was underway from the earlier economic history to cultural history and the history of mentalities. Impact outside France The Annales school systematically reached out to create an impact on other countries. Its success varied widely. The Annales approach was especially well received in Italy and Poland. Franciszek Bujak (1875–1953) and Jan Rutkowski (1886–1949), the founders of modern economic history in Poland and of the journal Roczniki Dziejów Spolecznych i Gospodarczych (1931– ), were attracted to the innovations of the Annales school. Rutkowski was in contact with Bloch and others, and published in the Annales. After the Communists took control in the 1940s Polish scholars were safer working on the Middle Ages and the early modern era rather than contemporary history. After the "Polish October" of 1956 the Sixth Section in Paris welcomed Polish historians and exchanges between the circle of the Annales and Polish scholars continued until the early 1980s. The reciprocal influence between the French school and Polish historiography was particularly evident in studies on the Middle Ages and the early modern era studied by Braudel. In South America the Annales approach became popular. From the 1950s Federico Brito Figueroa was the founder of a new Venezuelan historiography based largely on the ideas of the Annales School. Brito Figueroa carried his conception of the field to all levels of university study, emphasizing a systematic and scientific approach to history and placing it squarely in the social sciences. Spanish historiography was influenced by the "Annales School" starting in 1950 with Jaume Vicens Vives (1910–1960). In Mexico, exiled Republican intellectuals extended the Annales approach, particularly from the Center for Historical Studies of El Colegio de México, the leading graduate studies institution of Latin America. British historians, apart from a few Marxists, were generally hostile. Academic historians decidedly sided with Geoffrey Elton's The Practice of History against Edward Hallett Carr's What Is History? One of the few British historians who were sympathetic towards the work of the Annales school was Hugh Trevor-Roper. American, German, Indian, Russian and Japanese scholars generally ignored the school. The Americans developed their own form of "new social history" from entirely different roots. Both the American and the Annales historians picked up important family reconstitution techniques from French demographer Louis Henry. The Wageningen school centered on Bernard Slicher van Bath was viewed internationally as a Dutch counterpart of the Annales school, although Slicher van Bath himself vehemently rejected the idea of a quantitative "school" of historiography. Has been cited as a key influence in the development of World Systems Theory by sociologist Immanuel Wallerstein. Current The current leader is Roger Chartier, who is Directeur d'Études at the École des Hautes Études en Sciences Sociales in Paris, Professeur in the Collège de France, and Annenberg Visiting Professor of History at the University of Pennsylvania. He frequently lectures and teaches in the United States, Spain, Mexico, Brazil and Argentina. His work in Early Modern European History focuses on the history of education, the history of the book and the history of reading. Recently, he has been concerned with the relationship between written culture as a whole and literature (particularly theatrical plays) for France, England and Spain. His work in this specific field (based on the criss-crossing between literary criticism, bibliography, and sociocultural history) is connected to broader historiographical and methodological interests which deal with the relation between history and other disciplines: philosophy, sociology, anthropology. Chartier's typical undergraduate course focuses upon the making, remaking, dissemination, and reading of texts in early modern Europe and America. Under the heading of "practices," his class considers how readers read and marked up their books, forms of note-taking, and the interrelation between reading and writing from copying and translating to composing new texts. Under the heading of "materials," his class examines the relations between different kinds of writing surfaces (including stone, wax, parchment, paper, walls, textiles, the body, and the heart), writing implements (including styluses, pens, pencils, needles, and brushes), and material forms (including scrolls, erasable tables, codices, broadsides and printed forms and books). Under the heading of "places," his class explores where texts were made, read, and listened to, including monasteries, schools and universities, offices of the state, the shops of merchants and booksellers, printing houses, theaters, libraries, studies, and closets. The texts for his course include the Bible, translations of Ovid, Hamlet, Don Quixote, Montaigne's essays, Pepys's diary, Richardson's Pamela, and Franklin's autobiography. See also École des hautes études en sciences sociales Historiography Rural history Nouvelle histoire Structuralism Social history David Nirenberg § Anti-Judaism References Further reading About the School Aurell i Cardona, Jaume. "Autobiographical Texts as Historiographical Sources: Rereading Fernand Braudel and Annie Kriegel," Biography, Volume 29, Number 3, Summer 2006, pp. 425–445 in Project Muse Bintliff, John L. (ed.), The Annales School and archaeology, Leicester : Leicester University Press (1991), Burguière, André. L'École des Annales: Une histoire intellectuelle. Paris: Odile Jacob. 2006. Pp. 366. (English edition) Annales School: An Intellectual History. Ithaca NY: Cornell University Press. 2009. Pp. 309 Burke, Peter. The French Historical Revolution: The Annales School 1929–89, (1990), the major study in English excerpt and text search Carrard, Philippe. "Figuring France: The Numbers and Tropes of Fernand Braudel," Diacritics, Vol. 18, No. 3 (Autumn, 1988), pp. 2–19 in JSTOR Carrard, Philippe. Poetics of the New History: French Historical Discourse from Braudel to Chartier, (1992) Clark, Stuart, ed. The Annales School: Critical Assessments (4 vol, 1999) Crifò, Giuliano. "Scuola delle Annales e storia del diritto: la situazione italiana", Mélanges de l'École française de Rome, antiquité, vol. No. 93, (1981), pp.  483-494 in Persée Dewald, Jonathan. Lost Worlds: The Emergence of French Social History, 1815–1970 (2006) 250pp excerpt and text search Dosse, Francois. New History in France: The Triumph of the Annales, (1994, first French edition, 1987) excerpt and text search Fink, Carole. Marc Bloch: A Life in History, (1989) excerpt and text search Forster, Robert. "Achievements of the Annales School," The Journal of Economic History, Vol. 38, No. 1, (Mar., 1978), pp. 58–76 in JSTOR Friedman, Susan W. Marc Bloch, Sociology and Geography: Encountering Changing Disciplines (1996) excerpt and text search Harris, Olivia. "Braudel: Historical Time and the Horror of Discontinuity," History Workshop Journal, Issue 57, Spring 2004, pp. 161–174 in Project Muse Herubel, Jean-Pierre V. M. "Historiography's Horizon and Imperative: Febvrian Annales Legacy and Library History as Cultural History," Libraries & Culture, 39#3 (2004), pp. 293–312 in Project Muse Hexter, J. H. "Fernand Braudel and the Monde Braudellien," Journal of Modern History, 1972, vol. 44, pp. 480–539 in JSTOR Hufton, Olwen. "Fernand Braudel", Past and Present, No. 112. (Aug., 1986), pp. 208–213. in JSTOR Hunt, Lynn. "French History in the Last Twenty Years: the Rise and Fall of the Annales Paradigm." Journal of Contemporary History 1986 21(2): 209–224. Fulltext: in Jstor Huppert, George. "Lucien Febvre and Marc Bloch: The Creation of the Annales." The French Review 55#4 (1982), pp. 510–513 in JSTOR Iggers, G.G. Historiography in the Twentieth Century: From Scientific Objectivity to the Postmodern Challenge (1997), ch.5 Leroux, Robert, Histoire et sociologie en France: de l'histoire-science à la sociologie durkheimienne, Paris, Presses universitaires de France, 1998. Long, Pamela O. "The Annales and the History of Technology," Technology and Culture, 46#1 (2005), pp. 177–186 in Project Muse Megill, Allan. "Coherence and Incoherence in Historical Studies: From the Annales School to the New Cultural History," New Literary History, 35#2 (2004), pp. 207–231 in Project Muse Rubin, Miri. The Work of Jacques Le Goff and the Challenges of Medieval History (1997) 272 pages excerpts and text search Moon, David. "Fernand Braudel and the Annales School" online edition Poirrier, Philippe. Aborder l'histoire, Paris, Seuil, 2000. Roberts, Michael. "The Annales school and historical writing." in Peter Lambert and Phillipp Schofield, eds. Making History: An Introduction to the History and Practices of a Discipline. (2004), pp 78–92 online edition Schilling, Derek. "Everyday Life and the Challenge to History in Postwar France: Braudel, Lefebvre, Certeau," Diacritics, Volume 33, Number 1, Spring 2003, pp. 23–40 in Project Muse Steiner, Frederick. "Material Life: Human Ecology and the Annales School", Landscape Architecture Volume 76, Number 1, pp. 69–75. Stirling, Katherine. "Rereading Marc Bloch: the Life and Works of a Visionary Modernist." History Compass 2007 5#2: 525–538. in History Compass Stoianovich, Traian. French Historical Method: The Annales Paradigm, (1976) Trevor-Roper, H. R. "Fernand Braudel, the Annales, and the Mediterranean," The Journal of Modern History, 44#4 (1972), pp. 468–479 in JSTOR Major books and essays from the school Ariès, Philippe et al. eds, A History of Private Life (5 vols. 1987–94) Bloch, Marc. Les Rois Thaumaturges (1924), translated as The Royal Touch: Monarchy and Miracles in France and England (1990) Bloch, Marc. Feudal Society: Vol 1: The Growth and Ties of Dependence (1989); Feudal Society: Vol 2: Social Classes and Political Organisation(1989) excerpt and text search Bloch, Marc. French Rural History an Essay on Its Basic Characteristics (1972) Braudel, Fernand. La Méditerranée et le Monde Méditerranéen à l'Epoque de Philippe II (1949) (translated as The Mediterranean and the Mediterranean World in the Age of Philip II excerpt and text search vol. 1) Braudel, Fernand. Civilisation Matérielle, Economie et Capitalisme XVe–XVIIIe Siècle (3 vol. 1979) (translated as Capitalism and Material Life; excerpt and text search vol. 1; excerpt and text search vol 3) Burguière, André, and Jacques Revel. Histoire de la France (1989), textbook Chartier, Roger. Inscription and Erasure: Literature and Written Culture from the Eleventh to the Eighteenth Century (2007) excerpt and text search Earle, P., ed. Essays in European Economic History, 1500–1800, (1974), translated articles from Annales Ferro, Marc, ed. Social Historians in Contemporary France: Essays from "Annales", (1972) Goubert, Pierre. The French Peasantry in the Seventeenth Century (1986) excerpt and text search Goubert, Pierre. The Ancien Régime, 1600–1750 (1974) Le Roy Ladurie, Emmanuel. Montaillou: Cathars and Catholics in a French Village, 1294–1324 (1978) excerpt and text search Le Roy Ladurie, Emmanuel. The Peasants of Languedoc (1966; English translation 1974) search Hunt, Lynn, and Jacques Revel (eds). Histories: French Constructions of the Past. The New Press. 1994. (A collection of 64 essays with many pieces from the Annales). Historiography from the school Bloch, Marc. Méthodologie Historique (1988); originally conceived in 1906 but not published until 1988; revised in 1996 Bloch, Marc. Apologie pour l'histoire ou Métier d'historien (1949), translated as The Historian's Craft (1953) excerpt of 1992 introduction by Peter Burke (historian), and text search Braudel, Fernand. Ecrits sur l'histoire (1969), reprinted essays; translated as On History, (1980) excerpt and text search includes Braudel, Fernand. "Histoire et Science Sociale: La Longue Durée" (1958) Annales E.S.C., 13:4 October–December 1958, 725–753 Braudel, Fernand. "Personal Testimony." Journal of Modern History 1972 44(4): 448–467. in JSTOR Burke, Peter, ed. A New Kind of History From the Writings of Lucien Febvre, (1973) Duby, Georges. History Continues, (1991, translated 1994) Febvre, Lucien. A New Kind of History: From the Writings of Lucien Febvre ed. by Peter Burke (1973) translated articles from Annales Le Roy Ladurie, Emmanuel. The Mind and Method of the Historian (1981) Le Roy Ladurie, Emmanuel. The Territory of the Historian (1979) Le Goff, Jacques and Paul Archambault. "An Interview with Jacques Le Goff." Historical Reflections 1995 21(1): 155–185. Le Goff, Jacques, History and Memory (1996) excerpt and text search Revel, Jacques, and Lynn Hunt, eds. Histories: French Constructions of the Past, (1995). 654pp Revel, Jacques, ed. Political Uses of the Past: The Recent Mediterranean Experiences (2002) excerpt and text search Vovelle, M. Ideologies and Mentalities (1990) External links Free access to all issues of the Annales from 1929 to 2002. Recent issues of Annales: Histoire, Sciences Sociales (2003-present). Professor David Moon, "Fernand Braudel and the Annales School" (lecture 2005) Biography of Fernand Braudel. Detailed bibliographies of major historians. Histoire et mesure (1986-200 ), articles on quantitative history. Full text of articles. 20th century Historical schools Historiography of France Historiography Interdisciplinary historical research

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https://en.wikipedia.org/wiki/Americans%20with%20Disabilities%20Act%20of%201990

Americans with Disabilities Act of 1990

The Americans with Disabilities Act of 1990 or ADA () is a civil rights law that prohibits discrimination based on disability. It affords similar protections against discrimination to Americans with disabilities as the Civil Rights Act of 1964, which made discrimination based on race, religion, sex, national origin, and other characteristics illegal, and later sexual orientation and gender identity. In addition, unlike the Civil Rights Act, the ADA also requires covered employers to provide reasonable accommodations to employees with disabilities, and imposes accessibility requirements on public accommodations. In 1986, the National Council on Disability had recommended the enactment of an Americans with Disabilities Act and drafted the first version of the bill which was introduced in the House and Senate in 1988. A broad bipartisan coalition of legislators supported the ADA, while the bill was opposed by business interests (who argued the bill imposed costs on business) and conservative evangelicals (who opposed protection for individuals with HIV). The final version of the bill was signed into law on July 26, 1990, by President George H. W. Bush. It was later amended in 2008 and signed by President George W. Bush with changes effective as of January 1, 2009. Disabilities included ADA disabilities include both mental and physical medical conditions. A condition does not need to be severe or permanent to be a disability. Equal Employment Opportunity Commission regulations provide a list of conditions that should easily be concluded to be disabilities: amputation, attention deficit hyperactivity disorder (ADHD), autism, bipolar disorder, blindness, cancer, cerebral palsy, deafness, diabetes, epilepsy, human immunodeficiency virus (HIV), intellectual disability (formerly termed mental retardation), major depressive disorder, mobility impairments (often requiring a wheelchair), multiple sclerosis, muscular dystrophy, obsessive–compulsive disorder (OCD), post-traumatic stress disorder (PTSD), and schizophrenia. Other mental or physical health conditions also may be disabilities, depending on what the individual's symptoms would be in the absence of "mitigating measures" (medication, therapy, assistive devices, or other means of restoring function), during an "active episode" of the condition (if the condition is episodic). Certain specific conditions that are widely considered anti-social, or tend to result in illegal activity, such as kleptomania, pedophilia, exhibitionism, voyeurism, etc. are excluded under the definition of "disability" in order to prevent abuse of the statute's purpose. Additionally, sexual orientation is no longer considered a disorder and is also excluded under the definition of "disability". However, in 2022, the United States Court of Appeals for the Fourth Circuit stated that the ADA covers individuals with gender dysphoria, which may aid transgender people in accessing legal protections they otherwise may be unable to. Titles Title I—employment See also US labor law and . The ADA states that a "covered entity" shall not discriminate against "a qualified individual with a disability". This applies to job application procedures, hiring, advancement and discharge of employees, job training, and other terms, conditions, and privileges of employment. "Covered entities" include employers with 15 or more employees, as well as employment agencies, labor organizations, and joint labor-management committees. There are strict limitations on when a covered entity can ask job applicants or employees disability-related questions or require them to undergo medical examination, and all medical information must be kept confidential. Prohibited discrimination may include, among other things, firing or refusing to hire someone based on a real or perceived disability, segregation, and harassment based on a disability. Covered entities are also required to provide reasonable accommodations to job applicants and employees with disabilities. A reasonable accommodation is a change in the way things are typically done that the person needs because of a disability, and can include, among other things, special equipment that allows the person to perform the job, scheduling changes, and changes to the way work assignments are chosen or communicated. An employer is not required to provide an accommodation that would involve undue hardship (excessive difficulty or expense), and the individual who receives the accommodation must still perform the essential functions of the job and meet the normal performance requirements. An employee or applicant who currently engages in the illegal use of drugs is not considered qualified when a covered entity takes adverse action based on such use. Part of Title I was found unconstitutional by the United States Supreme Court as it pertains to states in the case of Board of Trustees of the University of Alabama v. Garrett as violating the sovereign immunity rights of the several states as specified by the Eleventh Amendment to the United States Constitution. The Court determined that state employees cannot sue their employer for violating ADA rules. State employees can, however, file complaints at the Department of Justice or the Equal Employment Opportunity Commission, who can sue on their behalf. Title II—public entities (and public transportation) Title II prohibits disability discrimination by all public entities at the local level, e.g., school district, municipal, city, or county, and at state level. Public entities must comply with Title II regulations by the U.S. Department of Justice. These regulations cover access to all programs and services offered by the entity. Access includes physical access described in the ADA Standards for Accessible Design and programmatic access that might be obstructed by discriminatory policies or procedures of the entity. Title II applies to public transportation provided by public entities through regulations by the U.S. Department of Transportation. It includes the National Railroad Passenger Corporation (Amtrak), along with all other commuter authorities. This section requires the provision of paratransit services by public entities that provide fixed-route services. ADA also sets minimum requirements for space layout in order to facilitate wheelchair securement on public transport. Title II also applies to all state and local public housing, housing assistance, and housing referrals. The Office of Fair Housing and Equal Opportunity is charged with enforcing this provision. Title III—public accommodations (and commercial facilities) Under Title III, no individual may be discriminated against on the basis of disability with regards to the full and equal enjoyment of the goods, services, facilities, or accommodations of any place of public accommodation by any person who owns, leases, or operates a place of public accommodation. Public accommodations include most places of lodging (such as inns and hotels), recreation, transportation, education, and dining, along with stores, care providers, and places of public displays. Under Title III of the ADA, all new construction (construction, modification or alterations) after the effective date of the ADA (approximately July 1992) must be fully compliant with the Americans With Disabilities Act Accessibility Guidelines (ADAAG) found in the Code of Federal Regulations at 28 C.F.R., Part 36, Appendix A. Title III also has applications to existing facilities. One of the definitions of "discrimination" under Title III of the ADA is a "failure to remove" architectural barriers in existing facilities. See . This means that even facilities that have not been modified or altered in any way after the ADA was passed still have obligations. The standard is whether "removing barriers" (typically defined as bringing a condition into compliance with the ADAAG) is "readily achievable", defined as "...easily accomplished without much difficulty or expense". The statutory definition of "readily achievable" calls for a balancing test between the cost of the proposed "fix" and the wherewithal of the business and/or owners of the business. Thus, what might be "readily achievable" for a sophisticated and financially capable corporation might not be readily achievable for a small or local business. There are exceptions to this title; many private clubs and religious organizations may not be bound by Title III. With regard to historic properties (those properties that are listed or that are eligible for listing in the National Register of Historic Places, or properties designated as historic under state or local law), those facilities must still comply with the provisions of Title III of the ADA to the "maximum extent feasible" but if following the usual standards would "threaten to destroy the historic significance of a feature of the building" then alternative standards may be used. Under 2010 revisions of Department of Justice regulations, newly constructed or altered swimming pools, wading pools, and spas must have an accessible means of entrance and exit to pools for disabled people. However, the requirement is conditioned on whether providing access through a fixed lift is "readily achievable". Other requirements exist, based on pool size, include providing a certain number of accessible means of entry and exit, which are outlined in Section 242 of the standards. However, businesses are free to consider the differences in the application of the rules depending on whether the pool is new or altered, or whether the swimming pool was in existence before the effective date of the new rule. Full compliance may not be required for existing facilities; Section 242 and 1009 of the 2010 Standards outline such exceptions. Service animals The ADA provides explicit coverage for service animals. Guidelines have been developed not only to protect persons with disabilities but also to indemnify businesses from damages related to granting access to service animals on their premises. Businesses are allowed to ask if the animal is a service animal and ask what tasks it is trained to perform, but they are not allowed to ask the service animal to perform the task nor ask for a special ID of the animal. They cannot ask what the person's disabilities are. A person with a disability cannot be removed from the premises unless either of two things happen: the animal is out of control and its owner cannot get it under control (e.g. a dog barking uncontrollably in a restaurant), or the animal is a direct threat to people's health and safety. Allergies and fear of animals would not be considered a threat to people's health and safety, so it would not be a valid reason to deny access to people with service animals. Businesses that prepare or serve food must allow service animals and their owners on the premises even if state or local health laws otherwise prohibit animals on the premises. In this case, businesses that prepare or serve food are not required to provide care or food for service animals, nor do they have to provide a designated area for the service animal to relieve itself. Lastly, people that require service dogs cannot be charged an extra fee for their service dog or be treated unfairly, for example, being isolated from people at a restaurant. People with disabilities cannot be treated as "less than" other customers. However, if a business normally charges for damages caused by the person to property, the customer with a disability will be charged for their service animal's damages to the property. Auxiliary aids The ADA provides explicit coverage for auxiliary aids. Auxiliary aids and services are items, equipment or services that assist in effective communication between a person who has a hearing, vision or speech disability and a person who does not. ADA says that a public accommodation shall take those steps that may be necessary to ensure that no individual with a disability is excluded, denied services, segregated or otherwise treated differently than other individuals because of the absence of auxiliary aids and services, unless the public accommodation can demonstrate that taking those steps would fundamentally alter the nature of the goods, services, facilities, privileges, advantages, or accommodations being offered or would result in an undue burden, i.e., significant difficulty or expense. The term "auxiliary aids and services" includes: Qualified interpreters on-site or through video remote interpreting (VRI) services; notetakers; real-time computer-aided transcription services; written materials; exchange of written notes; telephone handset amplifiers; assistive listening devices; assistive listening systems; telephones compatible with hearing aids; closed caption decoders; open and closed captioning, including real-time captioning; voice, text, and video-based telecommunications products and systems, including text telephones (TTYs), videophones, and captioned telephones, or equally effective telecommunications devices; videotext displays; accessible electronic and information technology; or other effective methods of making aurally delivered information available to individuals who are deaf or hard of hearing; Qualified readers; taped texts; audio recordings; Brailled materials and displays; screen reader software; magnification software; optical readers; secondary auditory programs (SAP); large print materials; accessible electronic and information technology; or other effective methods of making visually delivered materials available to individuals who are blind or have low vision; Acquisition or modification of equipment or devices; and Other similar services and actions. Captions are considered one type of auxiliary aid. Since the passage of the ADA, the use of captioning has expanded. Entertainment, educational, informational, and training materials are captioned for deaf and hard-of-hearing audiences at the time they are produced and distributed. The Television Decoder Circuitry Act of 1990 requires that all televisions larger than 13 inches sold in the United States after July 1993 have a special built-in decoder that enables viewers to watch closed-captioned programming. The Telecommunications Act of 1996 directs the Federal Communications Commission (FCC) to adopt rules requiring closed captioning of most television programming. The FCC's rules on closed captioning became effective January 1, 1998. Title IV—telecommunications Title IV of the ADA amended the landmark Communications Act of 1934 primarily by adding section . This section requires that all telecommunications companies in the U.S. take steps to ensure functionally equivalent services for consumers with disabilities, notably those who are deaf or hard of hearing and those with speech impairments. When Title IV took effect in the early 1990s, it led to the installation of public teletypewriter (TTY) machines and other TDD (telecommunications devices for the deaf). Title IV also led to the creation, in all 50 states and the District of Columbia, of what was then called dual-party relay services and now are known as Telecommunications Relay Services (TRS), such as STS relay. Today, many TRS-mediated calls are made over the Internet by consumers who use broadband connections. Some are Video Relay Service (VRS) calls, while others are text calls. In either variation, communication assistants translate between the signed or typed words of a consumer and the spoken words of others. In 2006, according to the Federal Communications Commission (FCC), VRS calls averaged two million minutes a month. Title V—miscellaneous provisions Title V includes technical provisions. It discusses, for example, the fact that nothing in the ADA amends, overrides or cancels anything in Section 504. Additionally, Title V includes an anti-retaliation or coercion provision. The Technical Assistance Manual for the ADA explains this provision: History The ADA has roots in Section 504 of the Rehabilitation Act of 1973. Drafting In 1986, the National Council on Disability (NCD), an independent federal agency, issued a report, Towards Independence, in which the Council examined incentives and disincentives in federal laws towards increasing the independence and full integration of people with disabilities into U.S. society. Among the disincentives to independence the Council identified was the existence of large remaining gaps in civil rights coverage for people with disabilities in the United States. A principal conclusion of the report was to recommend the adoption of comprehensive civil rights legislation, which became the ADA. The idea of federal legislation enhancing and extending civil rights legislation to millions of Americans with disabilities gained bipartisan support in late 1988 and early 1989. In early 1989 both Congress and the newly inaugurated Bush White House worked separately, then jointly, to write legislation capable of expanding civil rights without imposing undue harm or costs on those already in compliance with existing rules and laws. Lobbying Over the years, key activists and advocates played an important role in lobbying members of the U.S. Congress to develop and pass the ADA, including Justin Whitlock Dart Jr., Patrisha Wright and others. Ms. Wright is known as "the General" for her work in coordinating the campaign to enact the ADA. She is widely considered the main force behind the campaign lobbying for the ADA. Support and opposition Support Senator Bob Dole was a supporter and advocate for the bill. About the importance of making employment opportunities inclusive, Shirley Davis, director of global diversity and inclusion at the Society for Human Resource Management, said: "People with disabilities represent a critical talent pool that is underserved and underutilized". Opposition from religious groups Conservative evangelicals opposed the ADA because the legislation protected individuals with HIV, which they associated with homosexuality. The debate over the Americans with Disabilities Act led some religious groups to take opposite positions. The Association of Christian Schools International opposed the ADA in its original form, primarily because the ADA labeled religious institutions "public accommodations" and thus would have required churches to make costly structural changes to ensure access for all. The cost argument advanced by ACSI and others prevailed in keeping religious institutions from being labeled as "public accommodations". Church groups such as the National Association of Evangelicals testified against the ADA's Title I employment provisions on grounds of religious liberty. The NAE believed the regulation of the internal employment of churches was "... an improper intrusion [of] the federal government." Opposition from business interests Many companies and corporations, and business groups, opposed the Americans with Disabilities Act, arguing that the legislation would impose costs on businesses. Testifying before Congress, Greyhound Bus Lines stated that the act had the potential to "deprive millions of people of affordable intercity public transportation and thousands of rural communities of their only link to the outside world." The US Chamber of Commerce argued that the costs of the ADA would be "enormous" and have "a disastrous impact on many small businesses struggling to survive." The National Federation of Independent Businesses, an organization that lobbies for small businesses, called the ADA "a disaster for small business". Pro-business conservative commentators joined in opposition, writing that the Americans with Disabilities Act was "an expensive headache to millions" that would not necessarily improve the lives of people with disabilities. "Capitol Crawl" Shortly before the act was passed, disability rights activists with physical disabilities coalesced in front of the Capitol Building, shed their crutches, wheelchairs, powerchairs and other assistive devices, and immediately proceeded to crawl and pull their bodies up all 100 of the Capitol's front steps, without warning. As the activists did so, many of them chanted "ADA now", and "Vote, Now". Some activists who remained at the bottom of the steps held signs and yelled words of encouragement at the "Capitol Crawlers". Jennifer Keelan, a second grader with cerebral palsy, was videotaped as she pulled herself up the steps, using mostly her hands and arms, saying "I'll take all night if I have to." This direct action is reported to have "inconvenienced" several senators and to have pushed them to approve the act. While there are those who do not attribute much overall importance to this action, the "Capitol Crawl" of 1990 is seen by some present-day disability activists in the United States as a central act for encouraging the ADA into law. Final passage Senator Tom Harkin (D-IA) authored what became the final bill and was its chief sponsor in the Senate. Harkin delivered part of his introduction speech in sign language, saying it was so his deaf brother could understand. George H. W. Bush, on signing the measure on July 26, 1990, said: ADA Amendments Act, 2008 The ADA defines a covered disability as a physical or mental impairment that substantially limits one or more major life activities, a history of having such an impairment, or being regarded as having such an impairment. The Equal Employment Opportunity Commission (EEOC) was charged with interpreting the 1990 law with regard to discrimination in employment. The EEOC developed regulations limiting an individual's impairment to one that "severely or significantly restricts" a major life activity. The ADAAA directed the EEOC to amend its regulations and replace "severely or significantly" with "substantially limits", a more lenient standard. On September 25, 2008, President George W. Bush signed the ADA Amendments Act of 2008 (ADAAA) into law. The amendment broadened the definition of "disability", thereby extending the ADA's protections to a greater number of people. The ADAAA also added to the ADA examples of "major life activities" including, but not limited to, "caring for oneself, performing manual tasks, seeing, hearing, eating, sleeping, walking, standing, lifting, bending, speaking, breathing, learning, reading, concentrating, thinking, communicating, and working" as well as the operation of several specified major bodily functions. The act overturned a 1999 US Supreme Court case that held that an employee was not disabled if the impairment could be corrected by mitigating measures; it specifically provides that such impairment must be determined without considering such ameliorative measures. It also overturned the court restriction that an impairment that substantially limits one major life activity must also limit others to be considered a disability. In 2008, the United States House Committee on Education and Labor stated that the amendment "makes it absolutely clear that the ADA is intended to provide broad coverage to protect anyone who faces discrimination on the basis of disability." Thus the ADAAA led to broader coverage of impaired employees. Web Content Accessibility Guidelines, 2019 In October 2019, the Supreme Court declined to resolve a circuit split as to whether websites are covered by the ADA. The Court turned down an appeal from Domino's Pizza and let stand a U.S. 9th Circuit Court of Appeals ruling which held that the Americans With Disabilities Act protects access not just to brick-and-mortar public accommodations, but also to the websites and apps of those businesses. Impact The ADA led to significant improvements in terms of access to public services, accessibility in the built environment, and societal understanding of disability. Accessibility Employment Between 1991 (after the enactment of the ADA) and 1995, the employment rate of men with disabilities dropped by 7.8% regardless of age, educational level, or type of disability, with the most affected being young, less-educated and intellectually disabled men. While no causal link between the ADA and that trend has been definitively identified, some researchers have characterized the ADA as ineffectual and argued that it caused this decline by raising the cost of doing business for employers, who quietly avoid hiring people with disabilities for fear of lawsuit. To these employers, hiring people with disabilities became too expensive as they had to spend extra on assistive technology. In 2001, for men of all working ages and women under 40, Current Population Survey data showed a sharp drop in the employment of disabled workers, leading at least two economists to attribute the cause to the Act. By contrast, a study in 2003 found that while the Act may have led to short term reactions by employers, in the long term, there were either positive or neutral consequences for wages and employment. In 2005, the rate of employment among disabled people increased to 45% of the population of disabled people. Societal attitudes "Professional plaintiffs" Since enforcement of the act began in July 1992, it has quickly become a major component of employment law. The ADA allows private plaintiffs to receive only injunctive relief (a court order requiring the public accommodation to remedy violations of the accessibility regulations) and attorneys' fees, and does not provide monetary rewards to private plaintiffs who sue non-compliant businesses. Unless a state law, such as the California Unruh Civil Rights Act, provides for monetary damages to private plaintiffs, persons with disabilities do not obtain direct financial benefits from suing businesses that violate the ADA. The attorneys' fees provision of Title III does provide incentive for lawyers to specialize and engage in serial ADA litigation, but a disabled plaintiff does not obtain a financial reward from attorneys' fees unless they act as their own attorney, or as mentioned above, a disabled plaintiff resides in a state that provides for minimum compensation and court fees in lawsuits. Moreover, there may be a benefit to these private attorneys general who identify and compel the correction of illegal conditions: they may increase the number of public accommodations accessible to persons with disabilities. "Civil rights law depends heavily on private enforcement. Moreover, the inclusion of penalties and damages is the driving force that facilitates voluntary compliance with the ADA." Courts have noted: However, in states that have enacted laws that allow private individuals to win monetary awards from non-compliant businesses (as of 2008, these include California, Florida, Hawaii, and Illinois), "professional plaintiffs" are typically found. At least one of these plaintiffs in California has been barred by courts from filing lawsuits unless he receives prior court permission. Through the end of fiscal year 1998, 86% of the 106,988 ADA charges filed with and resolved by the Equal Employment Opportunity Commission, were either dropped or investigated and dismissed by EEOC but not without imposing opportunity costs and legal fees on employers. Case law There have been some notable cases regarding the ADA. For example, a major hotel room marketer (Hotels.com) with their business presence on the Internet was sued because their customers with disabilities could not reserve hotel rooms through their website without substantial extra efforts that persons without disabilities were not required to perform. Such lawsuits represent a major potential expansion of the ADA in that they (known as "bricks vs. clicks"), seek to expand the ADA's authority to cyberspace, where entities may not have actual physical facilities that are required to comply. Green v. State of California Green v. State of California, No. S137770 (Cal. August 23, 2007) was a case in which the majority of the Supreme Court in California was faced with deciding whether the employee suing the state is required to prove they are able to perform "essential" job duties, regardless of whether or not there was "reasonable accommodation", or if the employer must prove the person suing was unable to do so. The court ruled the burden was on the employee, not the employer, and reversed a disputed decision by the courts. Plaintiff attorney David Greenberg brought forth considerations of the concept that, even in the state of California, employers do not have to employ a worker who is unable to perform "essential job functions" with "reasonable accommodation". Forcing employers to do so "would defy logic and establish a poor public policy in employment matters." National Federation of the Blind v. Target Corporation National Federation of the Blind v. Target Corp. was a case where a major retailer, Target Corp., was sued because their web designers failed to design its website to enable persons with low or no vision to use it. Board of Trustees of the University of Alabama v. Garrett Board of Trustees of the University of Alabama v. Garrett was a United States Supreme Court case about Congress's enforcement powers under the Fourteenth Amendment to the Constitution. It decided that Title I of the Americans with Disabilities Act was unconstitutional insofar as it allowed private citizens to sue states for money damages. Barden v. The City of Sacramento Barden v. The City of Sacramento, filed in March 1999, claimed that the City of Sacramento failed to comply with the ADA when, while making public street improvements, it did not bring its sidewalks into compliance with the ADA. Certain issues were resolved in Federal Court. One issue, whether sidewalks were covered by the ADA, was appealed to the 9th Circuit Court of Appeals, which ruled that sidewalks were a "program" under ADA and must be made accessible to persons with disabilities. The ruling was later appealed to the U.S. Supreme Court, which refused to hear the case, letting stand the ruling of the 9th Circuit Court. Bates v. United Parcel Service, Inc Bates v. United Parcel Service, Inc (UPS; begun in 1999) was the first equal opportunity employment class action brought on behalf of Deaf and Hard of Hearing (d/Deaf/HoH) workers throughout the country concerning workplace discrimination. It established legal precedence for d/Deaf/HoH Employees and Customers to be fully covered under the ADA. Key findings included UPS failed to address communication barriers and to ensure equal conditions and opportunities for deaf employees; Deaf employees were routinely excluded from workplace information, denied opportunities for promotion, and exposed to unsafe conditions due to lack of accommodations by UPS; UPS also lacked a system to alert these employees as to emergencies, such as fires or chemical spills, to ensure that they would safely evacuate their facility; and UPS had no policy to ensure that deaf applicants and employees actually received effective communication in the workplace. The outcome was that UPS agreed to pay a $5.8 million award and agreed to a comprehensive accommodations program that was implemented in their facilities throughout the country. Spector v. Norwegian Cruise Line Ltd. Spector v. Norwegian Cruise Line Ltd. was a case that was decided by the United States Supreme Court in 2005. The defendant argued that as a vessel flying the flag of a foreign nation it was exempt from the requirements of the ADA. This argument was accepted by a federal court in Florida and, subsequently, the Fifth Circuit Court of Appeals. However, the U.S. Supreme Court reversed the ruling of the lower courts on the basis that Norwegian Cruise Lines was a business headquartered in the United States whose clients were predominantly Americans and, more importantly, operated out of port facilities throughout the United States. Olmstead v. L.C. Olmstead v. L.C. was a case before the United States Supreme Court in 1999. The two plaintiffs, Lois Curtis and E.W., were institutionalized in Georgia for diagnosed "mental retardation" and schizophrenia. Clinical assessments by the state determined that the plaintiffs could be appropriately treated in a community setting rather than the state institution. The plaintiffs sued the state of Georgia and the institution for being inappropriately treated and housed in the institutional setting rather than being treated in one of the state's community-based treatment facilities. The Supreme Court decided under Title II of the ADA that mental illness is a form of disability and therefore covered under the ADA, and that unjustified institutional isolation of a person with a disability is a form of discrimination because it "...perpetuates unwarranted assumptions that persons so isolated are incapable or unworthy of participating in community life." The court added, "Confinement in an institution severely diminishes the everyday life activities of individuals, including family relations, social contacts, work options, economic independence, educational advancement, and cultural enrichment." Therefore, under Title II no person with a disability can be unjustly excluded from participation in or be denied the benefits of services, programs or activities of any public entity. Michigan Paralyzed Veterans of America v. The University of Michigan Michigan Paralyzed Veterans of America v. The University of Michigan was a case filed before The United States District Court for the Eastern District of Michigan Southern Division. It was filed on behalf of the Michigan Paralyzed Veterans of America against University of Michigan – Michigan Stadium claiming that Michigan Stadium violated the Americans with Disabilities Act in its $226-million renovation by failing to add enough seats for disabled fans or accommodate the needs for disabled restrooms, concessions and parking. Additionally, the distribution of the accessible seating was at issue, with nearly all the seats being provided in the end-zone areas. The U.S. Department of Justice assisted in the suit filed by attorney Richard Bernstein of The Law Offices of Sam Bernstein in Farmington Hills, Michigan, which was settled in March 2008. The settlement required the stadium to add 329 wheelchair seats throughout the stadium by 2010, and an additional 135 accessible seats in clubhouses to go along with the existing 88 wheelchair seats. This case was significant because it set a precedent for the uniform distribution of accessible seating and gave the DOJ the opportunity to clarify previously unclear rules. The agreement now is a blueprint for all stadiums and other public facilities regarding accessibility. Paralyzed Veterans of America v. Ellerbe Becket Architects and Engineers One of the first major ADA lawsuits, Paralyzed Veterans of America v. Ellerbe Becket Architects and Engineers (PVA 1996) was focused on the wheelchair accessibility of a stadium project that was still in the design phase, MCI Center (now known as Capital One Arena) in Washington, D.C. Previous to this case, which was filed only five years after the ADA was passed, the DOJ was unable or unwilling to provide clarification on the distribution requirements for accessible wheelchair locations in large assembly spaces. While Section 4.33.3 of ADAAG makes reference to lines of sight, no specific reference is made to seeing over standing patrons. The MCI Center, designed by Ellerbe Becket Architects & Engineers, was designed with too few wheelchair and companion seats, and the ones that were included did not provide sight lines that would enable the wheelchair user to view the playing area while the spectators in front of them were standing. This case and another related case established precedent on seat distribution and sight lines issues for ADA enforcement that continues to present day. Toyota Motor Manufacturing, Kentucky, Inc. v. Williams Toyota Motor Manufacturing, Kentucky, Inc. v. Williams, was a case in which the Supreme Court interpreted the meaning of the phrase "substantially impairs" as used in the Americans with Disabilities Act. It reversed a Sixth Court of Appeals decision to grant a partial summary judgment in favor of the respondent, Ella Williams, that qualified her inability to perform manual job-related tasks as a disability. The Court held that the "major life activity" definition in evaluating the performance of manual tasks focuses the inquiry on whether Williams was unable to perform a range of tasks central to most people in carrying out the activities of daily living. The issue is not whether Williams was unable to perform her specific job tasks. Therefore, the determination of whether an impairment rises to the level of a disability is not limited to activities in the workplace solely, but rather to manual tasks in life in general. When the Supreme Court applied this standard, it found that the Court of Appeals had incorrectly determined the presence of a disability because it relied solely on her inability to perform specific manual work tasks, which was insufficient in proving the presence of a disability. The Court of Appeals should have taken into account the evidence presented that Williams retained the ability to do personal tasks and household chores, such activities being the nature of tasks most people do in their daily lives, and placed too much emphasis on her job disability. Since the evidence showed that Williams was performing normal daily tasks, it ruled that the Court of Appeals erred when it found that Williams was disabled. This ruling has since been invalidated by the ADAAA. In fact, Congress explicitly cited Toyota v. Williams in the text of the ADAAA itself as one of its driving influences for passing the ADAAA. US Airways, Inc. v. Barnett US Airways, Inc. v. Barnett was decided by the US Supreme Court in 2002. This case held that even requests for accommodation that might seem reasonable on their face, e.g., a transfer to a different position, can be rendered unreasonable because it would require a violation of the company's seniority system. While the court held that, in general, a violation of a seniority system renders an otherwise reasonable accommodation unreasonable, a plaintiff can present evidence that, despite the seniority system, the accommodation is reasonable in the specific case at hand, e.g., the plaintiff could offer evidence that the seniority system is so often disregarded that another exception would not make a difference. Importantly, the court held that the defendant need not provide proof that this particular application of the seniority system should prevail, and that, once the defendant showed that the accommodation violated the seniority system, it fell to Barnett to show it was nevertheless reasonable. In this case, Barnett was a US Airways employee who injured his back, rendering him physically unable to perform his cargo-handling job. Invoking seniority, he transferred to a less-demanding mailroom job, but this position later became open to seniority-based bidding and was bid on by more senior employees. Barnett requested the accommodation of being allowed to stay on in the less-demanding mailroom job. US Airways denied his request, and he lost his job. The Supreme Court decision invalidated both the approach of the district court, which found that the mere presence and importance of the seniority system was enough to warrant a summary judgment in favor of US Airways, as well as the circuit court's approach that interpreted 'reasonable accommodation' as 'effective accommodation.' Access Now v. Southwest Airlines Access Now, Inc. v. Southwest Airlines Co. was a 2002 case where the District Court decided that the website of Southwest Airlines was not in violation of the Americans with Disabilities Act, because the ADA is concerned with things with a physical existence and thus cannot be applied to cyberspace. Judge Patricia A. Seitz found that the "virtual ticket counter" of the website was a virtual construct, and hence not a "public place of accommodation". As such, "To expand the ADA to cover 'virtual' spaces would be to create new rights without well-defined standards." Ouellette v. Viacom International Inc. Ouellette v. Viacom International Inc. (2011) held that a mere online presence does not subject a website to the ADA guidelines. Thus Myspace and YouTube were not liable for a dyslexic man's inability to navigate the site regardless of how impressive the "online theater" is. Authors Guild v. HathiTrust Authors Guild v. HathiTrust was a case in which the District Court decided that the HathiTrust digital library was a transformative, fair use of copyrighted works, making a large number of written text available to those with print disability. Zamora-Quezada v. HealthTexas Medical Group Zamora-Quezada v. HealthTexas Medical Group (begun in 1998) was the first time this act was used against HMOs when a novel lawsuit was filed by Texas attorney Robert Provan against five HMOs for their practice of revoking the contracts of doctors treating disabled patients. In 1999, these HMOs sought to dismiss Provan's lawsuit, but a federal court ruled against them, and the case was settled out of court. Many decisions relating to Provan's unique lawsuit against these HMOs have been cited in other court cases since. Campbell v. General Dynamics Government Systems Corp. Campbell v. General Dynamics Government Systems Corp. (2005) concerned the enforceability of a mandatory arbitration agreement, contained in a dispute resolution policy linked to an e-mailed company-wide announcement, insofar as it applies to employment discrimination claims brought under the Americans with Disabilities Act. Tennessee v. Lane Tennessee v. Lane, 541 U.S. 509 (2004), was a case in the Supreme Court of the United States involving Congress's enforcement powers under section 5 of the Fourteenth Amendment. George Lane was unable to walk after a 1997 car accident in which he was accused of driving on the wrong side of the road. A woman was killed in the crash, and Lane faced misdemeanor charges of reckless driving. The suit was brought about because he was denied access to appear in criminal court because the courthouse had no elevator, even though the court was willing to carry him up the stairs and then willing to move the hearing to the first floor. He refused, citing he wanted to be treated as any other citizen, and was subsequently charged with failure to appear, after appearing at a previous hearing where he dragged himself up the stairs. The court ruled that Congress did have enough evidence that disabled people were being denied those fundamental rights that are protected by the Due Process clause of the Fourteenth Amendment and had the enforcement powers under section 5 of the Fourteenth Amendment. It further ruled that "reasonable accommodations" mandated by the ADA were not unduly burdensome and disproportionate to the harm. Gender dysphoria In 2022, the United States Court of Appeals for the Fourth Circuit stated that the ADA covers individuals with gender dysphoria, which may aid transgender people in accessing legal protections they otherwise may be unable to. See also References Further reading Bush, George H. W., Remarks of President George Bush at the Signing of the Americans with Disabilities Act. Available online at Equal Employment Opportunity Commission. Davis, Lennard J. Enabling Acts. The Hidden Story of How the Americans with Disabilities Act Gave the Largest US Minority Its Rights. Boston, MA: Beacon Press, 2015. Fielder, J. F. Mental Disabilities and the Americans with Disabilities Act. Westport, CT: Quorum Books, 2004. Hamilton Krieger, Linda, ed., Backlash Against the ADA: Reinterpreting Disability Rights Ann Arbor: University of Michigan Press, 2003. Johnson, Mary. (2000). Make Them Go Away: Clint Eastwood, Christopher Reeve & the Case Against Disability Rights. Louisville, KY: The Advocado Press. Mayer, Arlene. (1992). The History of the Americans with Disabilities Act: A Movement Perspective. Available online at the Disability Rights Education & Defense Fund website O'Brien, Ruth, ed. Voices from the Edge: Narratives about the Americans with Disabilities Act. New York: Oxford, 2004. Pletcher, David and Ashlee Russeau-Pletcher. History of the Civil Rights Movement for the Physically Disabled Schall, Carol M. (Jun 1998). The Americans with Disabilities Act—Are We Keeping Our Promise? An Analysis of the Effect of the ADA on the Employment of Persons with Disabilities. Journal of Vocational Rehabilitation, v10 n3 pp. 191–203. Schwochau, Susan & Blanck, Peter David. The Economics of the Americans with Disabilities Act, Part III: Does the ADA Disable the Disabled? Berkeley Journal of Employment & Labor Law [Vol. 21:271] Switzer, Jacqueline Vaughn. Disabled Rights: American Disability Policy and the Fight for Equality. Washington, D.C.: Georgetown University Press, 2003. Weber, Mark C. Disability Harassment. New York: NYU Press, 2007. External links Department of Labor ADA page Equal Employment Opportunity Commission ADA page As codified in 42 U.S.C. chapter 126 of the United States Code from the US House of Representatives As codified in 42 U.S.C. chapter 126 of the United States Code from the LII Americans with Disabilities Act of 1990 (PDF/details) as amended in the GPO Statute Compilations collection Family Network on Disabilities FNDUSA.ORG—Florida Parent Training and Information Center funded by DOED Offices of Special Education Programs (OSEP) Lainey Feingold's Global Law and Policy: United States – federal (national) 101st United States Congress 1990 in American law Anti-discrimination law in the United States Civil rights in the United States Disability in law United States federal civil rights legislation United States federal disability legislation

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https://en.wikipedia.org/wiki/Apple%20I

Apple I

The Apple Computer 1 (Apple-1), later known predominantly as the Apple I, is an 8-bit motherboard-only personal computer designed by Steve Wozniak and released by the Apple Computer Company (now Apple Inc.) in 1976. The company was initially formed to sell the Apple Iits first product and would later become the world's largest technology company. The idea of starting a company and selling the computer came from Wozniak's friend and Apple co-founder Steve Jobs. To finance its development, Wozniak and Jobs sold some of their possessions for a few hundred dollars. Wozniak demonstrated the first prototype in July 1976 at the Homebrew Computer Club in Palo Alto, California, impressing an early computer retailer. After securing an order for 50 computers, Jobs was able to order the parts on credit and deliver the first Apple products after ten days. The Apple I was one of the first computers available that used the inexpensive MOS Technology 6502 microprocessor. An expansion included a BASIC interpreter, allowing users to utilize BASIC at home instead of at institutions with mainframe computers, greatly lowering the entry cost for computing with BASIC. Production was discontinued on September 30, 1977, after the June 10, 1977 introduction of its successor, the Apple II, which Byte magazine referred to as part of the "1977 Trinity" of personal computing (along with the PET 2001 from Commodore Business Machines and the TRS-80 Model I from Tandy Corporation). As relatively few computers were made before they were discontinued, coupled with their status as Apple's first product, surviving Apple I units are now displayed in computer museums. History Development In 1975, Steve Wozniak started attending meetings of the Homebrew Computer Club, which was a major source of inspiration for him. New microcomputers such as the Altair 8800 and the IMSAI 8080 inspired Wozniak to build a microprocessor into his video terminal circuit to make a complete computer. At the time the only microcomputer CPUs generally available were the $179 Intel 8080 (), and the $170 Motorola 6800 (). Wozniak preferred the 6800, but both were out of his price range. So he watched, and learned, and designed computers on paper, waiting for the day he could afford a CPU. When MOS Technology released its $20 () 6502 chip in 1976, Wozniak wrote a version of BASIC for it, then began to design a computer for it to run on. The 6502 was designed by the same people who designed the 6800, as many in Silicon Valley left employers to form their own companies. Wozniak's earlier 6800 paper-computer needed only minor changes to run on the new chip. By March 1, 1976, Wozniak completed the basic design of his computer. Wozniak originally offered the design to HP while working there, but was denied by the company on five occasions. When he demonstrated his computer at the Homebrew Computer Club, his friend and fellow club regular Steve Jobs was immediately interested in its commercial potential. Wozniak intended to share schematics of the machine for free, but Jobs advised him to start a business together and sell bare printed circuit boards for the computer. Wozniak, at first skeptical, was later convinced by Jobs that even if they were not successful they could at least say to their grandchildren that they had had their own company. To raise the money they needed to build the first batch of the circuit boards, Wozniak sold his HP scientific calculator while Jobs sold his Volkswagen van. After the company was formed, Jobs and Wozniak made one last trip to the Homebrew Computer Club to give a presentation of the fully assembled "Apple Computer A". Paul Terrell, who was starting a new computer shop in Mountain View, California, called the Byte Shop, saw the presentation and was impressed by the machine. Terrell told Jobs that he would order 50 units of the Apple I and pay $500 () each on delivery, but only if they came fully assembledhe was not interested in buying bare printed circuit boards with no components. Jobs took the purchase order from the Byte Shop to national electronic parts distributor Cramer Electronics, and ordered the components needed. When asked by the credit manager how he would pay for the parts, Jobs replied, "I have this purchase order from the Byte Shop chain of computer stores for 50 of my computers and the payment terms are COD. If you give me the parts on net 30-day terms I can build and deliver the computers in that time frame, collect my money from Terrell at the Byte Shop and pay you." To verify the purchase order, the credit manager called Paul Terrell, who assured him if the computers showed up, Jobs would have more than enough money for the parts order. The two Steves and their small crew spent day and night building and testing the computers, and delivered to Terrell on time. Terrell was surprised to receive a batch of assembled circuit boards, as he had expected complete computers with a case, monitor and keyboard. Nonetheless, he kept his word and paid the two Steves the money promised. Announcement and sales The Apple I went on sale in July 1976 at a price of . Wozniak later said he had no idea about the relation between the number and the mark of the beast, and that he came up with the price because he liked "repeating digits" and because it was a one-third markup on the wholesale price. Jobs had managed to get the inventory into the nation's first four storefront microcomputer retailers: Byte Shop (Palo Alto, California), itty bitty machine company (Evanston, Illinois), Data Domain (Bloomington, Indiana), and Computer Mart (New York City). The first unit produced was used in a high school math class, and donated to Liza Loop's public-access computer center. About 200 units were produced, and all but 25 were sold within nine or ten months. In April 1977, the price was dropped to . It continued to be sold through August 1977, despite the introduction of the Apple II in April 1977, which began shipping in June of that year. In October 1977, the Apple I was officially discontinued and removed from Apple's price list. As Wozniak was the only person who could answer most customer support questions about the computer, the company offered Apple I owners discounts and trade-ins for Apple IIs to persuade them to return their computers. These recovered boards were then destroyed by Apple, contributing to their later rarity. Both Steve Jobs and Steve Wozniak have stated that Apple did not assign serial numbers to the Apple l. Several boards have been found with numbered stickers affixed to them, which appear to be inspection stickers from the PCB manufacturer/assembler. A batch of boards is known to have numbers hand-written in black permanent marker on the back; these usually appear as "01-00##". As of January 2022, 29 Apple-1s with a serial number are known. The highest known number is . Two original Apple-1s have been analyzed by PSA, Los Angeles, concluding the serial numbers had been hand-written by Steve Jobs. Hardware Wozniak's design originally used a Motorola 6800 processor, which cost $175, but when MOS Technology introduced the much cheaper 6502 microprocessor ($25) he switched. The Apple I CPU ran at , a fraction () of the NTSC color carrier which simplified video circuitry. Memory used the new 4-Kbit DRAM chips, and was , expandable to on board, or externally. The board was designed to use the next generation of 16-Kbit memory chips when they became available. An optional $75 plug-in cassette interface card allowed users to store programs on ordinary audio cassette tapes. A BASIC interpreter, originally written by Wozniak, was provided that let users easily write programs and play simple games. An onboard AC power supply was included. Video The Apple I's built-in computer terminal circuitry with TV composite output used shift register memory and a character generator. All one needed was a television set and a ASCII keyboard. The Apple I did not come with a case. It was either used as-is or some chose to build custom (mostly wooden) cases. Competing machines such as the Altair 8800 generally were programmed with front-mounted toggle switches and used indicator lights (red LEDs, most commonly) for output, and had to be extended with separate hardware to allow connection to a computer terminal or a teletypewriter machine. This made the Apple I, along with earlier introduced Sphere 1 and other hobbyist microcomputers, an innovative machine for its day. The computer used a Signetics 2513 64×8×5 Character Generator, capable of displaying uppercase characters, numbers and basic punctuation and math symbols with a 5x8 pixel font: Apple Cassette Interface expansion A cassette interface was available in the form of an optional add-on for the Apple I's expansion slot. A cassette deck plugged in to the expansion's phone connector ports could be written to and read from as a form of removable storage. The expansion came with a free cassette tape with an Apple BASIC interpreter, and other software tapes were supplied "at minimal cost" including ported video games such as Hamurabi, Lunar Lander and Star Trek. It is possible to save and play back recorded software using an iPod or other portable media player in place of a cassette deck. Conservation Only about 200 Apple I boards were produced, and the whereabouts of 62 to 82 are known. After the success of the Apple II, and of Apple broadly, the Apple I was recognized as an important historical computer; according to the 1986 Apple IIe Owner's Guide, an Apple I was worth "between $10,000 and $15,000" and a board was reportedly sold for $50,000 in 1999. In November 2010, an Apple I with a cache of original documents and packaging sold for £133,250 ($210,000) at Christie's auction house in London. The documents included the return label showing Steve Jobs's parents' address, a personally typed and signed letter from Jobs (answering technical questions about the computer), and the invoice (listing "Steven" as the salesman). The computer was brought to Polytechnic University of Turin for restoration. In October 2014 the Henry Ford Museum purchased an Apple I at a Bonhams auction for . The sale included the keyboard, monitor, cassette decks and a manual. In 2017, an Apple I removed from Steve Jobs's office in 1985 by Apple quality control engineer Don Hutmacher was placed on display at Living Computers: Museum + Labs. On May 30, 2015, an elderly woman reportedly dropped off boxes of electronics for disposal at an electronics recycling center in the Silicon Valley of Northern California. Included in the electronics (removed from her garage after the death of her husband) was an original Apple I computer, which the recycling firm sold for . When a discarded item is sold, it is the company's practice to give 50% of the proceeds to the original owner, but the woman has not been identified. Apple I computers with original documents and memorabilia have frequently been auctioned for over $300,000 throughout the 2010s and 2020s. The production prototype for the Apple I survives in a badly damaged state and was itself auctioned in 2022 for $677,196. Emulation Several Apple I clones and replicas have been released in recent years. These are created by hobbyists and marketed to the hobbyist/collector community. Availability is usually limited to small runs in response to demand. Emulation software for the Apple I has been written for modern home computers and for web browsers. It has also been emulated on 1980s era computers including the SAM Coupé and Commodore 64. See also Computer museum History of computer science History of computing KIM-1 Notes References Citations Sources Owad, Tom (2005). Apple I Replica Creation: Back to the Garage . Rockland, Mass.: Syngress Publishing. . Price, Rob (1987). So Far: The First Ten Years of a Vision. Cupertino, Calif.: Apple Computer. . External links Apple I Computer specifications Bugbook Computer Museum blog. Apple 1 display. Apple I Owners Club Apple I Operational Manual (browse) German making-of article to recreate the Apple I Operational Manual Apple I project on www.sbprojects.com Apple 1 Computer Registry Macintosh Prehistory: The Apple I John Calande III blog – Building the Apple I clone, including corrections on the early history of Apple Computer Apple 1 | Cameron's Closet – includes display of the Apple 1's character set on real hardware, compared to on most emulators Computer-related introductions in 1976 Apple II family Apple Inc. hardware Early microcomputers 6502-based home computers Products and services discontinued in 1977 Discontinued Apple Inc. products Steve Jobs

1349

https://en.wikipedia.org/wiki/Atanasoff%E2%80%93Berry%20computer

Atanasoff–Berry computer

The Atanasoff–Berry computer (ABC) was the first automatic electronic digital computer. Limited by the technology of the day, and execution, the device has remained somewhat obscure. The ABC's priority is debated among historians of computer technology, because it was neither programmable, nor Turing-complete. Conventionally, the ABC would be considered the first electronic ALU (arithmetic logic unit) which is integrated into every modern processor's design. Its unique contribution was to make computing faster by being the first to use vacuum tubes to do the arithmetic calculations. Prior to this, slower electro-mechanical methods were used by Konrad Zuse's Z1 computer, and the simultaneously developed Harvard Mark I. The first electronic, programmable, digital machine, the Colossus computer from 1943 to 1945, used similar tube-based technology as ABC. Overview Conceived in 1937, the machine was built by Iowa State College mathematics and physics professor John Vincent Atanasoff with the help of graduate student Clifford Berry. It was designed only to solve systems of linear equations and was successfully tested in 1942. However, its intermediate result storage mechanism, a paper card writer/reader, was not perfected, and when John Vincent Atanasoff left Iowa State College for World War II assignments, work on the machine was discontinued. The ABC pioneered important elements of modern computing, including binary arithmetic and electronic switching elements, but its special-purpose nature and lack of a changeable, stored program distinguish it from modern computers. The computer was designated an IEEE Milestone in 1990. Atanasoff and Berry's computer work was not widely known until it was rediscovered in the 1960s, amid patent disputes over the first instance of an electronic computer. At that time ENIAC, that had been created by John Mauchly and J. Presper Eckert, was considered to be the first computer in the modern sense, but in 1973 a U.S. District Court invalidated the ENIAC patent and concluded that the ENIAC inventors had derived the subject matter of the electronic digital computer from Atanasoff. When, in the mid-1970s, the secrecy surrounding the British World War II development of the Colossus computers that pre-dated ENIAC, was lifted and Colossus was described at a conference in Los Alamos, New Mexico, in June 1976, John Mauchly and Konrad Zuse were reported to have been astonished. Design and construction According to Atanasoff's account, several key principles of the Atanasoff–Berry computer were conceived in a sudden insight after a long nighttime drive to Rock Island, Illinois, during the winter of 1937–38. The ABC innovations included electronic computation, binary arithmetic, parallel processing, regenerative capacitor memory, and a separation of memory and computing functions. The mechanical and logic design was worked out by Atanasoff over the next year. A grant application to build a proof of concept prototype was submitted in March 1939 to the Agronomy department, which was also interested in speeding up computation for economic and research analysis. $5,000 of further funding () to complete the machine came from the nonprofit Research Corporation of New York City. The ABC was built by Atanasoff and Berry in the basement of the physics building at Iowa State College during 1939–1942. The initial funds were released in September, and the 11-tube prototype was first demonstrated in October 1939. A December demonstration prompted a grant for construction of the full-scale machine. The ABC was built and tested over the next two years. A January 15, 1941, story in the Des Moines Register announced the ABC as "an electrical computing machine" with more than 300 vacuum tubes that would "compute complicated algebraic equations" (but gave no precise technical description of the computer). The system weighed more than . It contained approximately of wire, 280 dual-triode vacuum tubes, 31 thyratrons, and was about the size of a desk. It was not programmable, which distinguishes it from more general machines of the same era, such as Konrad Zuse's 1941 Z3 (or earlier iterations) and the Colossus computers of 1943–1945. Nor did it implement the stored-program architecture, first implemented in the Manchester Baby of 1948, required for fully general-purpose practical computing machines. The machine was, however, the first to implement: Using vacuum tubes, rather than wheels, ratchets, mechanical switches, or telephone relays, allowing for greater speed than previous computers Using capacitors for memory, rather than mechanical components, allowing for greater speed and density The memory of the Atanasoff–Berry computer was a system called regenerative capacitor memory, which consisted of a pair of drums, each containing 1600 capacitors that rotated on a common shaft once per second. The capacitors on each drum were organized into 32 "bands" of 50 (30 active bands and two spares in case a capacitor failed), giving the machine a speed of 30 additions/subtractions per second. Data was represented as 50-bit binary fixed-point numbers. The electronics of the memory and arithmetic units could store and operate on 60 such numbers at a time (3000 bits). The alternating current power-line frequency of 60 Hz was the primary clock rate for the lowest-level operations. The arithmetic logic functions were fully electronic, implemented with vacuum tubes. The family of logic gates ranged from inverters to two- and three-input gates. The input and output levels and operating voltages were compatible between the different gates. Each gate consisted of one inverting vacuum-tube amplifier, preceded by a resistor divider input network that defined the logical function. The control logic functions, which only needed to operate once per drum rotation and therefore did not require electronic speed, were electromechanical, implemented with relays. The ALU operated on only one bit of each number at a time; it kept the carry/borrow bit in a capacitor for use in the next AC cycle. Although the Atanasoff–Berry computer was an important step up from earlier calculating machines, it was not able to run entirely automatically through an entire problem. An operator was needed to operate the control switches to set up its functions, much like the electro-mechanical calculators and unit record equipment of the time. Selection of the operation to be performed, reading, writing, converting to or from binary to decimal, or reducing a set of equations was made by front-panel switches and, in some cases, jumpers. There were two forms of input and output: primary user input and output and an intermediate results output and input. The intermediate results storage allowed operation on problems too large to be handled entirely within the electronic memory. (The largest problem that could be solved without the use of the intermediate output and input was two simultaneous equations, a trivial problem.) Intermediate results were binary, written onto paper sheets by electrostatically modifying the resistance at 1500 locations to represent 30 of the 50-bit numbers (one equation). Each sheet could be written or read in one second. The reliability of the system was limited to about 1 error in 100,000 calculations by these units, primarily attributed to lack of control of the sheets' material characteristics. In retrospect, a solution could have been to add a parity bit to each number as written. This problem was not solved by the time Atanasoff left the university for war-related work. Primary user input was decimal, via standard IBM 80-column punched cards, and output was decimal, via a front-panel display. Function The ABC was designed for a specific purpose the solution of systems of simultaneous linear equations. It could handle systems with up to 29 equations, a difficult problem for the time. Problems of this scale were becoming common in physics, the department in which John Atanasoff worked. The machine could be fed two linear equations with up to 29 variables and a constant term and eliminate one of the variables. This process would be repeated manually for each of the equations, which would result in a system of equations with one fewer variable. Then the whole process would be repeated to eliminate another variable. George W. Snedecor, the head of Iowa State's Statistics Department, was very likely the first user of an electronic digital computer to solve real-world mathematics problems. He submitted many of these problems to Atanasoff. Patent dispute On June 26, 1947, J. Presper Eckert and John Mauchly were the first to file for patent on a digital computing device (ENIAC), much to the surprise of Atanasoff. The ABC had been examined by John Mauchly in June 1941, and Isaac Auerbach, a former student of Mauchly's, alleged that it influenced his later work on ENIAC, although Mauchly denied this. The ENIAC patent did not issue until 1964, and by 1967 Honeywell sued Sperry Rand in an attempt to break the ENIAC patents, arguing that the ABC constituted prior art. The United States District Court for the District of Minnesota released its judgement on October 19, 1973, finding in Honeywell v. Sperry Rand that the ENIAC patent was a derivative of John Atanasoff's invention. Campbell-Kelly and Aspray conclude: The case was legally resolved on October 19, 1973, when U.S. District Judge Earl R. Larson held the ENIAC patent invalid, ruling that the ENIAC derived many basic ideas from the Atanasoff–Berry computer. Judge Larson explicitly stated: Herman Goldstine, one of the original developers of ENIAC wrote: Replica The original ABC was eventually dismantled in 1948, when the university converted the basement to classrooms, and all of its pieces except for one memory drum were discarded. In 1997, a team of researchers led by Dr. Delwyn Bluhm and John Gustafson from Ames Laboratory (located on the Iowa State University campus) finished building a working replica of the Atanasoff–Berry computer at a cost of $350,000 (equivalent to $ in ). The replica ABC was on display in the first floor lobby of the Durham Center for Computation and Communication at Iowa State University and was subsequently exhibited at the Computer History Museum. See also History of computing hardware List of vacuum-tube computers Mikhail Kravchuk References Bibliography External links The Birth of the ABC Reconstruction of the ABC, 1994-1997 John Gustafson, Reconstruction of the Atanasoff-Berry Computer The ENIAC patent trial Honeywell v. Sperry Rand Records, 1846-1973, Charles Babbage Institute, University of Minnesota. The Atanasoff-Berry Computer In Operation (YouTube) 1940s computers One-of-a-kind computers Vacuum tube computers Computer-related introductions in 1942 Early computers Iowa State University Serial computers

1358

https://en.wikipedia.org/wiki/Anchor

Anchor

An anchor is a device, normally made of metal, used to secure a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. The word derives from Latin , which itself comes from the Greek (). Anchors can either be temporary or permanent. Permanent anchors are used in the creation of a mooring, and are rarely moved; a specialist service is normally needed to move or maintain them. Vessels carry one or more temporary anchors, which may be of different designs and weights. A sea anchor is a drag device, not in contact with the seabed, used to minimise drift of a vessel relative to the water. A drogue is a drag device used to slow or help steer a vessel running before a storm in a following or overtaking sea, or when crossing a bar in a breaking sea. Overview Anchors achieve holding power either by "hooking" into the seabed, or weight, or a combination of the two. Permanent moorings use large masses (commonly a block or slab of concrete) resting on the seabed. Semi-permanent mooring anchors (such as mushroom anchors) and large ship's anchors derive a significant portion of their holding power from their weight, while also hooking or embedding in the bottom. Modern anchors for smaller vessels have metal flukes that hook on to rocks on the bottom or bury themselves in soft seabed. The vessel is attached to the anchor by the rode (also called a cable or a warp). It can be made of rope, chain or a combination of rope and chain. The ratio of the length of rode to the water depth is known as the scope (see below). Holding ground Holding ground is the area of sea floor that holds an anchor, and thus the attached ship or boat. Different types of anchor are designed to hold in different types of holding ground. Some bottom materials hold better than others; for instance, hard sand holds well, shell holds poorly. Holding ground may be fouled with obstacles. An anchorage location may be chosen for its holding ground. In poor holding ground, only the weight of an anchor matters; in good holding ground, it is able to dig in, and the holding power can be significantly higher. History Evolution of the anchor The earliest anchors were probably rocks, and many rock anchors have been found dating from at least the Bronze Age. Pre-European Maori waka (canoes) used one or more hollowed stones, tied with flax ropes, as anchors. Many modern moorings still rely on a large rock as the primary element of their design. However, using pure weight to resist the forces of a storm works well only as a permanent mooring; a large enough rock would be nearly impossible to move to a new location. The ancient Greeks used baskets of stones, large sacks filled with sand, and wooden logs filled with lead. According to Apollonius Rhodius and Stephen of Byzantium, anchors were formed of stone, and Athenaeus states that they were also sometimes made of wood. Such anchors held the vessel merely by their weight and by their friction along the bottom. Fluked anchors Iron was afterwards introduced for the construction of anchors, and an improvement was made by forming them with teeth, or "flukes", to fasten themselves into the bottom. This is the iconic anchor shape most familiar to non-sailors. This form has been used since antiquity. The Roman Nemi ships of the 1st century AD used this form. The Viking Ladby ship (probably 10th century) used a fluked anchor of this type, made of iron, which would have had a wooden stock mounted perpendicular to the shank and flukes to make the flukes contact the bottom at a suitable angle to hook or penetrate. Admiralty anchor The Admiralty Pattern anchor, or simply "Admiralty", also known as a "Fisherman", consists of a central shank with a ring or shackle for attaching the rode (the rope, chain, or cable connecting the ship and the anchor). At the other end of the shank there are two arms, carrying the flukes, while the stock is mounted to the shackle end, at ninety degrees to the arms. When the anchor lands on the bottom, it generally falls over with the arms parallel to the seabed. As a strain comes onto the rope, the stock digs into the bottom, canting the anchor until one of the flukes catches and digs into the bottom. The Admiralty Anchor is an entirely independent reinvention of a classical design, as seen in one of the Nemi ship anchors. This basic design remained unchanged for centuries, with the most significant changes being to the overall proportions, and a move from stocks made of wood to iron stocks in the late 1830s and early 1840s. Since one fluke always protrudes up from the set anchor, there is a great tendency of the rode to foul the anchor as the vessel swings due to wind or current shifts. When this happens, the anchor may be pulled out of the bottom, and in some cases may need to be hauled up to be re-set. In the mid-19th century, numerous modifications were attempted to alleviate these problems, as well as improve holding power, including one-armed mooring anchors. The most successful of these patent anchors, the Trotman Anchor, introduced a pivot at the centre of the crown where the arms join the shank, allowing the "idle" upper arm to fold against the shank. When deployed the lower arm may fold against the shank tilting the tip of the fluke upwards, so each fluke has a tripping palm at its base, to hook on the bottom as the folded arm drags along the seabed, which unfolds the downward oriented arm until the tip of the fluke can engage the bottom. Handling and storage of these anchors requires special equipment and procedures. Once the anchor is hauled up to the hawsepipe, the ring end is hoisted up to the end of a timber projecting from the bow known as the cathead. The crown of the anchor is then hauled up with a heavy tackle until one fluke can be hooked over the rail. This is known as "catting and fishing" the anchor. Before dropping the anchor, the fishing process is reversed, and the anchor is dropped from the end of the cathead. Stockless anchor The stockless anchor, patented in England in 1821, represented the first significant departure in anchor design in centuries. Although their holding-power-to-weight ratio is significantly lower than admiralty pattern anchors, their ease of handling and stowage aboard large ships led to almost universal adoption. In contrast to the elaborate stowage procedures for earlier anchors, stockless anchors are simply hauled up until they rest with the shank inside the hawsepipes, and the flukes against the hull (or inside a recess in the hull). While there are numerous variations, stockless anchors consist of a set of heavy flukes connected by a pivot or ball and socket joint to a shank. Cast into the crown of the anchor is a set of tripping palms, projections that drag on the bottom, forcing the main flukes to dig in. Small boat anchors Until the mid-20th century, anchors for smaller vessels were either scaled-down versions of admiralty anchors, or simple grapnels. As new designs with greater holding-power-to-weight ratios were sought, a great variety of anchor designs has emerged. Many of these designs are still under patent, and other types are best known by their original trademarked names. Grapnel anchor / drag A traditional design, the grapnel is merely a shank (no stock) with four or more tines, also known as a drag. It has a benefit in that, no matter how it reaches the bottom, one or more tines are aimed to set. In coral, or rock, it is often able to set quickly by hooking into the structure, but may be more difficult to retrieve. A grapnel is often quite light, and may have additional uses as a tool to recover gear lost overboard. Its weight also makes it relatively easy to move and carry, however its shape is generally not compact and it may be awkward to stow unless a collapsing model is used. Grapnels rarely have enough fluke area to develop much hold in sand, clay, or mud. It is not unknown for the anchor to foul on its own rode, or to foul the tines with refuse from the bottom, preventing it from digging in. On the other hand, it is quite possible for this anchor to find such a good hook that, without a trip line from the crown, it is impossible to retrieve. Herreshoff anchor Designed by yacht designer L. Francis Herreshoff, this is essentially the same pattern as an admiralty anchor, albeit with small diamond-shaped flukes or palms. The novelty of the design lay in the means by which it could be broken down into three pieces for stowage. In use, it still presents all the issues of the admiralty pattern anchor. Northill anchor Originally designed as a lightweight anchor for seaplanes, this design consists of two plough-like blades mounted to a shank, with a folding stock crossing through the crown of the anchor. CQR plough anchor Many manufacturers produce a plough-type anchor, so-named after its resemblance to an agricultural plough. All such anchors are copied from the original CQR (Coastal Quick Release, or Clyde Quick Release, later rebranded as 'secure' by Lewmar), a 1933 design patented in the UK by mathematician Geoffrey Ingram Taylor. Plough anchors stow conveniently in a roller at the bow, and have been popular with cruising sailors and private boaters. Ploughs can be moderately good in all types of seafloor, though not exceptional in any. Contrary to popular belief, the CQR's hinged shank is not to allow the anchor to turn with direction changes rather than breaking out, but actually to prevent the shank's weight from disrupting the fluke's orientation while setting. The hinge can wear out and may trap a sailor's fingers. Some later plough anchors have a rigid shank, such as the Lewmar's "Delta". A plough anchor has a fundamental flaw: like its namesake, the agricultural plough, it digs in but then tends to break out back to the surface. Plough anchors sometimes have difficulty setting at all, and instead skip across the seafloor. By contrast, modern efficient anchors tend to be "scoop" types that dig ever deeper. Delta anchor The Delta anchor was derived from the CQR. It was patented by Philip McCarron, James Stewart, and Gordon Lyall of British marine manufacturer Simpson-Lawrence Ltd in 1992. It was designed as an advance over the anchors used for floating systems such as oil rigs. It retains the weighted tip of the CQR but has a much higher fluke area to weight ratio than its predecessor. The designers also eliminated the sometimes troublesome hinge. It is a plough anchor with a rigid, arched shank. It is described as self-launching because it can be dropped from a bow roller simply by paying out the rode, without manual assistance. This is an oft copied design with the European Brake and Australian Sarca Excel being two of the more notable ones. Although it is a plough type anchor, it sets and holds reasonably well in hard bottoms. Danforth anchor American Richard Danforth invented the Danforth Anchor in the 1940s for use aboard landing craft. It uses a stock at the crown to which two large flat triangular flukes are attached. The stock is hinged so the flukes can orient toward the bottom (and on some designs may be adjusted for an optimal angle depending on the bottom type). Tripping palms at the crown act to tip the flukes into the seabed. The design is a burying variety, and once well set can develop high resistance. Its lightweight and compact flat design make it easy to retrieve and relatively easy to store; some anchor rollers and hawsepipes can accommodate a fluke-style anchor. A Danforth does not usually penetrate or hold in gravel or weeds. In boulders and coral it may hold by acting as a hook. If there is much current, or if the vessel is moving while dropping the anchor, it may "kite" or "skate" over the bottom due to the large fluke area acting as a sail or wing. The FOB HP anchor designed in Brittany in the 1970s is a Danforth variant designed to give increased holding through its use of rounded flukes setting at a 30° angle. The Fortress is an American aluminum alloy Danforth variant that can be disassembled for storage and it features an adjustable 32° and 45° shank/fluke angle to improve holding capability in common sea bottoms such as hard sand and soft mud. This anchor performed well in a 1989 US Naval Sea Systems Command (NAVSEA) test and in an August 2014 holding power test that was conducted in the soft mud bottoms of the Chesapeake Bay. Bruce or claw anchor This claw-shaped anchor was designed by Peter Bruce from Scotland in the 1970s. Bruce gained his early reputation from the production of large-scale commercial anchors for ships and fixed installations such as oil rigs. It was later scaled down for small boats, and copies of this popular design abound. The Bruce and its copies, known generically as "claw type anchors", have been adopted on smaller boats (partly because they stow easily on a bow roller) but they are most effective in larger sizes. Claw anchors are quite popular on charter fleets as they have a high chance to set on the first try in many bottoms. They have the reputation of not breaking out with tide or wind changes, instead slowly turning in the bottom to align with the force. Bruce anchors can have difficulty penetrating weedy bottoms and grass. They offer a fairly low holding-power-to-weight ratio and generally have to be oversized to compete with newer types. Scoop type anchors Three time circumnavigator German Rolf Kaczirek invented the Bügel Anker in the 1980s. Kaczirek wanted an anchor that was self-righting without necessitating a ballasted tip. Instead, he added a roll bar and switched out the plough share for a flat blade design. As none of the innovations of this anchor were patented, copies of it abound. Alain Poiraud of France introduced the scoop type anchor in 1996. Similar in design to the Bügel anchor, Poiraud's design features a concave fluke shaped like the blade of a shovel, with a shank attached parallel to the fluke, and the load applied toward the digging end. It is designed to dig into the bottom like a shovel, and dig deeper as more pressure is applied. The common challenge with all the scoop type anchors is that they set so well, they can be difficult to weigh. Bügelanker, or Wasi: This German-designed bow anchor has a sharp tip for penetrating weed, and features a roll-bar that allows the correct setting attitude to be achieved without the need for extra weight to be inserted into the tip. Spade: This is a French design that has proven successful since 1996. It features a demountable shank (hollow in some instances) and the choice of galvanized steel, stainless steel, or aluminium construction, which means a lighter and more easily stowable anchor. The geometry also makes this anchor self stowing on a single roller. Rocna: This New Zealand spade design, available in galvanised or stainless steel, has been produced since 2004. It has a roll-bar (similar to that of the Bügel), a large spade-like fluke area, and a sharp toe for penetrating weed and grass. The Rocna sets quickly and holds well. Mantus: This is claimed to be a fast setting anchor with high holding power. It is designed as an all round anchor capable of setting even in challenging bottoms such as hard sand/clay bottoms and grass. The shank is made out of a high tensile steel capable of withstanding high loads. It is similar in design to the Rocna but has a larger and wider roll-bar that reduces the risk of fouling and increases the angle of the fluke that results in improved penetration in some bottoms. Ultra: This is an innovative spade design that dispenses with a roll-bar. Made primarily of stainless steel, its main arm is hollow, while the fluke tip has lead within it. It is similar in appearance to the Spade anchor. Vulcan: A recent sibling to the Rocna, this anchor performs similarly but does not have a roll-bar. Instead the Vulcan has patented design features such as the "V-bulb" and the "Roll Palm" that allow it to dig in deeply. The Vulcan was designed primarily for sailors who had difficulties accommodating the roll-bar Rocna on their bow. Peter Smith (originator of the Rocna) designed it specifically for larger powerboats. Both Vulcans and Rocnas are available in galvanised steel, or in stainless steel. The Vulcan is similar in appearance to the Spade anchor. Knox Anchor: This is produced in Scotland and was invented by Professor John Knox. It has a divided concave large area fluke arrangement and a shank in high tensile steel. A roll bar similar to the Rocna gives fast setting and a holding power of about 40 times anchor weight. Other temporary anchors Mud weight: Consists of a blunt heavy weight, usually cast iron or cast lead, that sinks into the mud and resist lateral movement. It is suitable only for soft silt bottoms and in mild conditions. Sizes range between 5 and 20 kg for small craft. Various designs exist and many are home produced from lead or improvised with heavy objects. This is a commonly used method on the Norfolk Broads in England. Bulwagga: This is a unique design featuring three flukes instead of the usual two. It has performed well in tests by independent sources such as American boating magazine Practical Sailor. Permanent anchors These are used where the vessel is permanently or semi-permanently sited, for example in the case of lightvessels or channel marker buoys. The anchor needs to hold the vessel in all weathers, including the most severe storm, but needs to be lifted only occasionally, at most – for example, only if the vessel is to be towed into port for maintenance. An alternative to using an anchor under these circumstances, especially if the anchor need never be lifted at all, may be to use a pile that is driven into the seabed. Permanent anchors come in a wide range of types and have no standard form. A slab of rock with an iron staple in it to attach a chain to would serve the purpose, as would any dense object of appropriate weight (for instance, an engine block). Modern moorings may be anchored by augers, which look and act like oversized screws drilled into the seabed, or by barbed metal beams pounded in (or even driven in with explosives) like pilings, or by a variety of other non-mass means of getting a grip on the bottom. One method of building a mooring is to use three or more conventional anchors laid out with short lengths of chain attached to a swivel, so no matter which direction the vessel moves, one or more anchors are aligned to resist the force. Mushroom The mushroom anchor is suitable where the seabed is composed of silt or fine sand. It was invented by Robert Stevenson, for use by an 82-ton converted fishing boat, Pharos, which was used as a lightvessel between 1807 and 1810 near to Bell Rock whilst the lighthouse was being constructed. It was equipped with a 1.5-ton example. It is shaped like an inverted mushroom, the head becoming buried in the silt. A counterweight is often provided at the other end of the shank to lay it down before it becomes buried. A mushroom anchor normally sinks in the silt to the point where it has displaced its own weight in bottom material, thus greatly increasing its holding power. These anchors are suitable only for a silt or mud bottom, since they rely upon suction and cohesion of the bottom material, which rocky or coarse sand bottoms lack. The holding power of this anchor is at best about twice its weight until it becomes buried, when it can be as much as ten times its weight. They are available in sizes from about 5 kg up to several tons. Deadweight A deadweight is an anchor that relies solely on being a heavy weight. It is usually just a large block of concrete or stone at the end of the chain. Its holding power is defined by its weight underwater (i.e., taking its buoyancy into account) regardless of the type of seabed, although suction can increase this if it becomes buried. Consequently, deadweight anchors are used where mushroom anchors are unsuitable, for example in rock, gravel or coarse sand. An advantage of a deadweight anchor over a mushroom is that if it does drag, it continues to provide its original holding force. The disadvantage of using deadweight anchors in conditions where a mushroom anchor could be used is that it needs to be around ten times the weight of the equivalent mushroom anchor. Auger Auger anchors can be used to anchor permanent moorings, floating docks, fish farms, etc. These anchors, which have one or more slightly pitched self-drilling threads, must be screwed into the seabed with the use of a tool, so require access to the bottom, either at low tide or by use of a diver. Hence they can be difficult to install in deep water without special equipment. Weight for weight, augers have a higher holding than other permanent designs, and so can be cheap and relatively easily installed, although difficult to set in extremely soft mud. High-holding-types There is a need in the oil-and-gas industry to resist large anchoring forces when laying pipelines and for drilling vessels. These anchors are installed and removed using a support tug and pennant/pendant wire. Some examples are the Stevin range supplied by Vrijhof Ankers. Large plate anchors such as the Stevmanta are used for permanent moorings. Anchoring gear The elements of anchoring gear include the anchor, the cable (also called a rode), the method of attaching the two together, the method of attaching the cable to the ship, charts, and a method of learning the depth of the water. Vessels may carry a number of anchors: bower anchors are the main anchors used by a vessel and normally carried at the bow of the vessel. A kedge anchor is a light anchor used for warping an anchor, also known as kedging, or more commonly on yachts for mooring quickly or in benign conditions. A stream anchor, which is usually heavier than a kedge anchor, can be used for kedging or warping in addition to temporary mooring and restraining stern movement in tidal conditions or in waters where vessel movement needs to be restricted, such as rivers and channels. Charts are vital to good anchoring. Knowing the location of potential dangers, as well as being useful in estimating the effects of weather and tide in the anchorage, is essential in choosing a good place to drop the hook. One can get by without referring to charts, but they are an important tool and a part of good anchoring gear, and a skilled mariner would not choose to anchor without them. Anchor rode The anchor rode (or "cable" or "warp") that connects the anchor to the vessel is usually made up of chain, rope, or a combination of those. Large ships use only chain rode. Smaller craft might use a rope/chain combination or an all chain rode. All rodes should have some chain; chain is heavy but it resists abrasion from coral, sharp rocks, or shellfish beds, whereas a rope warp is susceptible to abrasion and can fail in a short time when stretched against an abrasive surface. The weight of the chain also helps keep the direction of pull on the anchor closer to horizontal, which improves holding, and absorbs part of snubbing loads. Where weight is not an issue, a heavier chain provides better holding by forming a catenary curve through the water and resting as much of its length on the bottom as would not be lifted by tension of the mooring load. Any changes to the tension are accommodated by additional chain being lifted or settling on the bottom, and this absorbs shock loads until the chain is straight, at which point the full load is taken by the anchor. Additional dissipation of shock loads can be achieved by fitting a snubber between the chain and a bollard or cleat on deck. This also reduces shock loads on the deck fittings, and the vessel usually lies more comfortably and quietly. Being strong and elastic, nylon rope is the most suitable as an anchor rode. Polyester (terylene) is stronger but less elastic than nylon. Both materials sink, so they avoid fouling other craft in crowded anchorages and do not absorb much water. Neither breaks down quickly in sunlight. Elasticity helps absorb shock loading, but causes faster abrasive wear when the rope stretches over an abrasive surface, like a coral bottom or a poorly designed chock. Polypropylene ("polyprop") is not suited to rodes because it floats and is much weaker than nylon, being barely stronger than natural fibres. Some grades of polypropylene break down in sunlight and become hard, weak, and unpleasant to handle. Natural fibres such as manila or hemp are still used in developing nations but absorb a lot of water, are relatively weak, and rot, although they do give good handling grip and are often relatively cheap. Ropes that have little or no elasticity are not suitable as anchor rodes. Elasticity is partly a function of the fibre material and partly of the rope structure. All anchors should have chain at least equal to the boat's length. Some skippers prefer an all chain warp for greater security on coral or sharp edged rock bottoms. The chain should be shackled to the warp through a steel eye or spliced to the chain using a chain splice. The shackle pin should be securely wired or moused. Either galvanized or stainless steel is suitable for eyes and shackles, galvanised steel being the stronger of the two. Some skippers prefer to add a swivel to the rode. There is a school of thought that says these should not be connected to the anchor itself, but should be somewhere in the chain. However, most skippers connect the swivel directly to the anchor. Scope Scope is the ratio of length of the rode to the depth of the water measured from the highest point (usually the anchor roller or bow chock) to the seabed, making allowance for the highest expected tide. The function of this ratio is to ensure that the pull on the anchor is unlikely to break it out of the bottom if it is embedded, or lift it off a hard bottom, either of which is likely to result in the anchor dragging. A large scope induces a load that is nearly horizontal. In moderate conditions the ratio of rode to water depth should be 4:1 – where there is sufficient swing-room, a greater scope is always better. In rougher conditions it should be up to twice this with the extra length giving more stretch and a smaller angle to the bottom to resist the anchor breaking out. For example, if the water is deep, and the anchor roller is above the water, then the 'depth' is 9 meters (~30 feet). The amount of rode to let our in moderate conditions is thus 36 meters (120 feet). (For this reason it is important to have a reliable and accurate method of measuring the depth of water.) When using a rope rode, there is a simple way to estimate the scope: The ratio of bow height of the rode to length of rode above the water while lying back hard on the anchor is the same or less than the scope ratio. The basis for this is simple geometry (Intercept Theorem): The ratio between two sides of a triangle stays the same regardless of the size of the triangle as long as the angles do not change. Generally, the rode should be between 5 and 10 times the depth to the seabed, giving a scope of 5:1 or 10:1; the larger the number, the shallower the angle is between the cable and the seafloor, and the less upwards force is acting on the anchor. A 10:1 scope gives the greatest holding power, but also allows for much more drifting due to the longer amount of cable paid out. Anchoring with sufficient scope and/or heavy chain rode brings the direction of strain close to parallel with the seabed. This is particularly important for light, modern anchors designed to bury in the bottom, where scopes of 5:1 to 7:1 are common, whereas heavy anchors and moorings can use a scope of 3:1, or less. Some modern anchors, such as the Ultra holds with a scope of 3:1; but, unless the anchorage is crowded, a longer scope always reduces shock stresses. Anchoring techniques The basic anchoring consists of determining the location, dropping the anchor, laying out the scope, setting the hook, and assessing where the vessel ends up. The ship seeks a location that is sufficiently protected; has suitable holding ground, enough depth at low tide and enough room for the boat to swing. The location to drop the anchor should be approached from down wind or down current, whichever is stronger. As the chosen spot is approached, the vessel should be stopped or even beginning to drift back. The anchor should initially be lowered quickly but under control until it is on the bottom (see anchor windlass). The vessel should continue to drift back, and the cable should be veered out under control (slowly) so it is relatively straight. Once the desired scope is laid out, the vessel should be gently forced astern, usually using the auxiliary motor but possibly by backing a sail. A hand on the anchor line may telegraph a series of jerks and jolts, indicating the anchor is dragging, or a smooth tension indicative of digging in. As the anchor begins to dig in and resist backward force, the engine may be throttled up to get a thorough set. If the anchor continues to drag, or sets after having dragged too far, it should be retrieved and moved back to the desired position (or another location chosen.) There are techniques of anchoring to limit the swing of a vessel if the anchorage has limited room: Using an anchor weight, kellet or sentinel Lowering a concentrated, heavy weight down the anchor line – rope or chain – directly in front of the bow to the seabed behaves like a heavy chain rode and lowers the angle of pull on the anchor. If the weight is suspended off the seabed it acts as a spring or shock absorber to dampen the sudden actions that are normally transmitted to the anchor and can cause it to dislodge and drag. In light conditions, a kellet reduces the swing of the vessel considerably. In heavier conditions these effects disappear as the rode becomes straightened and the weight ineffective. Known as an "anchor chum weight" or "angel" in the UK. Forked moor Using two anchors set approximately 45° apart, or wider angles up to 90°, from the bow is a strong mooring for facing into strong winds. To set anchors in this way, first one anchor is set in the normal fashion. Then, taking in on the first cable as the boat is motored into the wind and letting slack while drifting back, a second anchor is set approximately a half-scope away from the first on a line perpendicular to the wind. After this second anchor is set, the scope on the first is taken up until the vessel is lying between the two anchors and the load is taken equally on each cable. This moor also to some degree limits the range of a vessel's swing to a narrower oval. Care should be taken that other vessels do not swing down on the boat due to the limited swing range. Bow and stern (Not to be mistaken with the Bahamian moor, below.) In the bow and stern technique, an anchor is set off each the bow and the stern, which can severely limit a vessel's swing range and also align it to steady wind, current or wave conditions. One method of accomplishing this moor is to set a bow anchor normally, then drop back to the limit of the bow cable (or to double the desired scope, e.g. 8:1 if the eventual scope should be 4:1, 10:1 if the eventual scope should be 5:1, etc.) to lower a stern anchor. By taking up on the bow cable the stern anchor can be set. After both anchors are set, tension is taken up on both cables to limit the swing or to align the vessel. Bahamian moor Similar to the above, a Bahamian moor is used to sharply limit the swing range of a vessel, but allows it to swing to a current. One of the primary characteristics of this technique is the use of a swivel as follows: the first anchor is set normally, and the vessel drops back to the limit of anchor cable. A second anchor is attached to the end of the anchor cable, and is dropped and set. A swivel is attached to the middle of the anchor cable, and the vessel connected to that. The vessel now swings in the middle of two anchors, which is acceptable in strong reversing currents, but a wind perpendicular to the current may break out the anchors, as they are not aligned for this load. Backing an anchor Also known as tandem anchoring, in this technique two anchors are deployed in line with each other, on the same rode. With the foremost anchor reducing the load on the aft-most, this technique can develop great holding power and may be appropriate in "ultimate storm" circumstances. It does not limit swinging range, and might not be suitable in some circumstances. There are complications, and the technique requires careful preparation and a level of skill and experience above that required for a single anchor. Kedging Kedging or warping is a technique for moving or turning a ship by using a relatively light anchor. In yachts, a kedge anchor is an anchor carried in addition to the main, or bower anchors, and usually stowed aft. Every yacht should carry at least two anchors – the main or bower anchor and a second lighter kedge anchor. It is used occasionally when it is necessary to limit the turning circle as the yacht swings when it is anchored, such as in a narrow river or a deep pool in an otherwise shallow area. Kedge anchors are sometimes used to recover vessels that have run aground. For ships, a kedge may be dropped while a ship is underway, or carried out in a suitable direction by a tender or ship's boat to enable the ship to be winched off if aground or swung into a particular heading, or even to be held steady against a tidal or other stream. Historically, it was of particular relevance to sailing warships that used them to outmaneuver opponents when the wind had dropped but might be used by any vessel in confined, shoal water to place it in a more desirable position, provided she had enough manpower . Club hauling Club hauling is an archaic technique. When a vessel is in a narrow channel or on a lee shore so that there is no room to tack the vessel in a conventional manner, an anchor attached to the lee quarter may be dropped from the lee bow. This is deployed when the vessel is head to wind and has lost headway. As the vessel gathers sternway the strain on the cable pivots the vessel around what is now the weather quarter turning the vessel onto the other tack. The anchor is then normally cut away (the ship's momentum prevents recovery without aborting the maneuver). Weighing anchor Since all anchors that embed themselves in the bottom require the strain to be along the seabed, anchors can be broken out of the bottom by shortening the rope until the vessel is directly above the anchor; at this point the anchor chain is "up and down", in naval parlance. If necessary, motoring slowly around the location of the anchor also helps dislodge it. Anchors are sometimes fitted with a trip line attached to the crown, by which they can be unhooked from rocks, coral, chain, or other underwater hazards. The term aweigh describes an anchor when it is hanging on the rope and is not resting on the bottom. This is linked to the term to weigh anchor, meaning to lift the anchor from the sea bed, allowing the ship or boat to move. An anchor is described as aweigh when it has been broken out of the bottom and is being hauled up to be stowed. Aweigh should not be confused with under way, which describes a vessel that is not moored to a dock or anchored, whether or not the vessel is moving through the water. Aweigh is also often confused with away, which is incorrect. Anchor as symbol An anchor frequently appears on the flags and coats of arms of institutions involved with the sea, both naval and commercial, as well as of port cities and seacoast regions and provinces in various countries. There also exists in heraldry the "Anchored Cross", or Mariner's Cross, a stylized cross in the shape of an anchor. The symbol can be used to signify 'fresh start' or 'hope'. The New Testament refers to the Christian's hope as "an anchor of the soul". The Mariner's Cross is also referred to as St. Clement's Cross, in reference to the way this saint was killed (being tied to an anchor and thrown from a boat into the Black Sea in 102). Anchored crosses are occasionally a feature of coats of arms in which context they are referred to by the heraldic terms anchry or ancre. In 1887, the Delta Gamma Fraternity adopted the anchor as its badge to signify hope. The Unicode anchor (Miscellaneous Symbols) is represented by: ⚓. See also "Anchors Aweigh", United States Navy marching song References Bibliography Blackwell, Alex & Daria; Happy Hooking – the Art of Anchoring, 2008, 2011, 2019 White Seahorse; Edwards, Fred; Sailing as a Second Language: An illustrated dictionary, 1988 Highmark Publishing; Hinz, Earl R.; The Complete Book of Anchoring and Mooring, Rev. 2d ed., 1986, 1994, 2001 Cornell Maritime Press; Hiscock, Eric C.; Cruising Under Sail, second edition, 1965 Oxford University Press; Pardey, Lin and Larry; The Capable Cruiser; 1995 Pardey Books/Paradise Cay Publications; Rousmaniere, John; The Annapolis Book of Seamanship, 1983, 1989 Simon and Schuster; Smith, Everrett; Cruising World's Guide to Seamanship: Hold me tight, 1992 New York Times Sports/Leisure Magazines Further reading William N. Brady (1864). The Kedge-anchor; Or, Young Sailors' Assistant. First published as The Naval Apprentice's Kedge Anchor. New York, Taylor and Clement, 1841.--The Kedge-anchor; 3rd ed. New York, 1848.--6th ed. New York, 1852.--9th ed. New York, 1857. External links Anchor Tests: Soft Sand Over Hard Sand—Practical-Sailor The Big Anchor Project Anchor comparison Heraldic charges Nautical terminology Sailboat components Sailing ship components Ship anchors Watercraft components Weights

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https://en.wikipedia.org/wiki/Anagram

Anagram

An anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. For example, the word anagram itself can be rearranged into nag a ram; which is an Easter egg in Google when searching for the word "anagram"; the word binary-into brainy and the word adobe-into abode. The original word or phrase is known as the subject of the anagram. Any word or phrase that exactly reproduces the letters in another order is an anagram. Someone who creates anagrams may be called an "anagrammatist", and the goal of a serious or skilled anagrammatist is to produce anagrams that reflect or comment on their subject. Examples Anagrams may be created as a commentary on the subject. They may be a parody, a criticism or satire. For example: "New York Times" = "monkeys write" "Church of Scientology" = "rich-chosen goofy cult" "McDonald's restaurants" = "Uncle Sam's standard rot" "coronavirus" = "carnivorous" "She Sells Sanctuary" = "Santa; shy, less cruel" or "Satan; cruel, less shy" An anagram may also be a synonym of the original word. For example: "evil" = "vile" "a gentleman" = "elegant man" "eleven plus two" = "twelve plus one" An anagram that has a meaning opposed to that of the original word or phrase is called an "antigram". For example: "restful" = "fluster" "cheater" = "teacher" "funeral" = "real fun" "adultery" = "true lady" "forty five" = "over fifty" "Santa" = "Satan" They can sometimes change from a proper noun or personal name into an appropriate sentence: "William Shakespeare" = "I am a weakish speller" "Madam Curie" = "Radium came" "George Bush" = "He bugs Gore" "Tom Marvolo Riddle" = "I am Lord Voldemort" They can change part of speech, such as the adjective "silent" to the verb "listen". "Anagrams" itself can be anagrammatized as "Ars magna" (Latin, 'the great art'). History Anagrams can be traced back to the time of the ancient Greeks, and were used to find the hidden and mystical meaning in names. They were popular throughout Europe during the Middle Ages, for example with the poet and composer Guillaume de Machaut. They are said to date back at least to the Greek poet Lycophron, in the third century BCE; but this relies on an account of Lycophron given by John Tzetzes in the 12th century. In the Talmudic and Midrashic literature, anagrams were used to interpret the Hebrew Bible, notably by Eleazar of Modi'im. Later, Kabbalists took this up with enthusiasm, calling anagrams temurah. Anagrams in Latin were considered witty over many centuries. Est vir qui adest, explained below, was cited as the example in Samuel Johnson's A Dictionary of the English Language. They became hugely popular in the early modern period, especially in Germany. Any historical material on anagrams must always be interpreted in terms of the assumptions and spellings that were current for the language in question. In particular, spelling in English only slowly became fixed. There were attempts to regulate anagram formation, an important one in English being that of George Puttenham's Of the Anagram or Posy Transposed in The Art of English Poesie (1589). Influence of Latin As a literary game when Latin was the common property of the literate, Latin anagrams were prominent. Two examples are the change of Ave Maria, gratia plena, Dominus tecum (Latin: Hail Mary, full of grace, the Lord [is] with you) into Virgo serena, pia, munda et immaculata (Latin: Serene virgin, pious, clean and spotless), and the anagrammatic answer to Pilate's question, Quid est veritas? (Latin: What is truth?), namely, Est vir qui adest (Latin: It is the man who is here). The origins of these are not documented. Latin continued to influence letter values (such as I = J, U = V and W = VV). There was an ongoing tradition of allowing anagrams to be "perfect" if the letters were all used once, but allowing for these interchanges. This can be seen in a popular Latin anagram against the Jesuits: Societas Jesu turned into Vitiosa seces (Latin: Cut off the wicked things). Puttenham, in the time of Elizabeth I, wished to start from Elissabet Anglorum Regina (Latin: Elizabeth Queen of the English), to obtain Multa regnabis ense gloria (Latin: By thy sword shalt thou reign in great renown); he explains carefully that H is "a note of aspiration only and no letter", and that Z in Greek or Hebrew is a mere SS. The rules were not completely fixed in the 17th century. William Camden in his Remains commented, singling out some letters—Æ, K, W, and Z—not found in the classical Roman alphabet: Early modern period When it comes to the 17th century and anagrams in English or other languages, there is a great deal of documented evidence of learned interest. The lawyer Thomas Egerton was praised through the anagram gestat honorem ('he carries honor'); the physician George Ent took the anagrammatic motto genio surget ('he rises through spirit/genius'), which requires his first name as Georgius. James I's courtiers discovered in "James Stuart" "a just master", and converted "Charles James Stuart" into "Claims Arthur's seat" (even at that point in time, the letters I and J were more-or-less interchangeable). Walter Quin, tutor to the future Charles I, worked hard on multilingual anagrams on the name of father James. A notorious murder scandal, the Overbury case, threw up two imperfect anagrams that were aided by typically loose spelling and were recorded by Simonds D'Ewes: "Francis Howard" (for Frances Carr, Countess of Somerset, her maiden name spelled in a variant) became "Car findes a whore", with the letters E hardly counted, and the victim Thomas Overbury, as "Thomas Overburie", was written as "O! O! a busie murther" (an old form of "murder"), with a V counted as U. William Drummond of Hawthornden, in an essay On the Character of a Perfect Anagram, tried to lay down rules for permissible substitutions (such as S standing for Z) and letter omissions. William Camden provided a definition of "Anagrammatisme" as "a dissolution of a name truly written into his letters, as his elements, and a new connection of it by artificial transposition, without addition, subtraction or change of any letter, into different words, making some perfect sense appliable (i.e., applicable) to the person named." Dryden in MacFlecknoe disdainfully called the pastime the "torturing of one poor word ten thousand ways". "Eleanor Audeley", wife of Sir John Davies, is said to have been brought before the High Commission in 1634 for extravagances, stimulated by the discovery that her name could be transposed to "Reveale, O Daniel", and to have been laughed out of court by another anagram submitted by Sir John Lambe, the dean of the Arches, "Dame Eleanor Davies", "Never soe mad a ladie". An example from France was a flattering anagram for Cardinal Richelieu, comparing him to Hercules or at least one of his hands (Hercules being a kingly symbol), where Armand de Richelieu became Ardue main d'Hercule ("difficult hand of Hercules"). Modern period Examples from the 19th century are the transposition of "Horatio Nelson" into Honor est a Nilo (Latin: Honor is from the Nile); and of "Florence Nightingale" into "Flit on, cheering angel". The Victorian love of anagramming as recreation is alluded to by the mathematician Augustus De Morgan using his own name as an example; "Great Gun, do us a sum!" is attributed to his son William De Morgan, but a family friend John Thomas Graves was prolific, and a manuscript with over 2,800 has been preserved. With the advent of surrealism as a poetic movement, anagrams regained the artistic respect they had had in the Baroque period. The German poet Unica Zürn, who made extensive use of anagram techniques, came to regard obsession with anagrams as a "dangerous fever", because it created isolation of the author. The surrealist leader André Breton coined the anagram Avida Dollars for Salvador Dalí, to tarnish his reputation by the implication of commercialism. Applications While anagramming is certainly a recreation first, there are ways in which anagrams are put to use, and these can be more serious, or at least not quite frivolous and formless. For example, psychologists use anagram-oriented tests, often called "anagram solution tasks", to assess the implicit memory of young adults and adults alike. Establishment of priority Natural philosophers (astronomers and others) of the 17th century transposed their discoveries into Latin anagrams, to establish their priority. In this way they laid claim to new discoveries before their results were ready for publication. Galileo used for (Latin: I have observed the most distant planet to have a triple form) for discovering the rings of Saturn in 1610. Galileo announced his discovery that Venus had phases like the Moon in the form (Latin: These immature ones have already been read in vain by me -oy), that is, when rearranged, (Latin: The Mother of Loves [= Venus] imitates the figures of Cynthia [= the moon]). In both cases, Johannes Kepler had solved the anagrams incorrectly, assuming they were talking about the Moons of Mars () and a red spot on Jupiter (), respectively. By coincidence, he turned out to be right about the actual objects existing. In 1656, Christiaan Huygens, using a better telescope than those available to Galileo, figured that Galileo's earlier observations of Saturn actually meant it had a ring (Galileo's tools were only sufficient to see it as bumps) and, like Galileo, had published an anagram, . Upon confirming his observations, three years later he revealed it to mean (Latin: It [Saturn] is surrounded by a thin, flat, ring, nowhere touching, inclined to the ecliptic). When Robert Hooke discovered Hooke's law in 1660, he first published it in anagram form, , for (Latin: as the extension, so the force). Pseudonyms Anagrams are connected to pseudonyms, by the fact that they may conceal or reveal, or operate somewhere in between like a mask that can establish identity. For example, Jim Morrison used an anagram of his name in the Doors song "L.A. Woman", calling himself "Mr. Mojo Risin'". The use of anagrams and fabricated personal names may be to circumvent restrictions on the use of real names, as happened in the 18th century when Edward Cave wanted to get around restrictions imposed on the reporting of the House of Commons. In a genre such as farce or parody, anagrams as names may be used for pointed and satiric effect. Pseudonyms adopted by authors are sometimes transposed forms of their names; thus "Calvinus" becomes "Alcuinus" (here V = U) or "François Rabelais" = "Alcofribas Nasier". The name "Voltaire" of François Marie Arouet fits this pattern, and is allowed to be an anagram of "Arouet, l[e] j[eune]" (U = V, J = I) that is, "Arouet the younger". Other examples include: "Damon Albarn" = "Dan Abnormal" "Dave Barry" = "Ray Adverb" "Arrigo Boito" = "Tobia Gorrio" "Buckethead" = "Death Cube K" "Daniel Clowes" = "Enid Coleslaw" "Siobhán Donaghy" = "Shanghai Nobody" "Glen Duncan" = "Declan Gunn" "(Theodor) Geisel" = "(Theo) Le Sieg" "Edward Gorey" = "Ogdred Weary", = "Regera Dowdy" or = "E. G. Deadworry" (and others) "Anna Madrigal" = "A man and a girl" "Ted Morgan" = "(Sanche) de Gramont" "Lorin Morgan-Richards" = "Marcil d'Hirson Garron" "Vladimir Nabokov" = "Vivian Darkbloom", = "Vivian Bloodmark", = "Blavdak Vinomori", or = "Dorian Vivalkomb" Several of these are "imperfect anagrams", letters having been left out in some cases for the sake of easy pronunciation. Titles Anagrams used for titles afford scope for some types of wit. Examples: Homer Hickam's book Rocket Boys was adapted into the 1999 film October Sky. The tapes for the revival of the BBC show Doctor Who were labeled with the anagram Torchwood, which later went on to be used as the name for a spin-off show. In multi-episode shows, the program occasionally substitutes the anagram of an actor's name for the actual name to prevent revealing the true identity of the role (for instance, The Master) being played by the actor. The New Wave band Missing Persons' best-selling album was called Spring Session M. Hip-hop artist MF Doom recorded a 2004 album called Mm..Food. Brian Eno's album Before and After Science includes a song entitled "King's Lead Hat", an anagram of "Talking Heads", a band Eno has worked with. Juan Maria Solare's piano ballad "Jura ser anomalía" (literally "he/she swears to be an anomaly") is an anagram of the composer's full name. His composition for English horn titled "A Dot in Time" is an anagram of "Meditation", which describes the piece. The title of his piano piece that is a homage to Claude Debussy is "Seduce Us Badly". Bill Evans's overdubbed piano elegy for fellow jazz pianist Sonny Clark is titled "N.Y.C.'s No Lark", and another composition, "Re: Person I Knew" is a tribute to his producer, Orrin Keepnews. The title of Imogen Heap's album iMegaphone is an anagram of her name. Progressive rock group Rush published a song on their 1989 album Presto titled "Anagram (for Mongo)" that makes use of anagrams in every line of the song. The title of the fifth album by American rock band Interpol, El Pintor, is an anagram of the band's name and also Spanish for "the painter". Many of the song titles on Aphex Twin's ...I Care Because You Do are anagrams of either "Aphex Twin", "The Aphex Twin", or "Richard D. James". In Disney's 1964 film Mary Poppins, Dick Van Dyke played Mr. Dawes Sr. as the anagram of his name, Navckid Keyd. In the credits, the words unscrambled themselves to reveal his name. The title of King Crimson's 1982 song Thela Hun Ginjeet is an anagram of "heat in the jungle". Two albums released in 2022 by Australian rock band King Gizzard & the Lizard Wizard titled "Made in Timeland" and "Laminated Denim". Coincidences In Hebrew, the name "Gernot Zippe" (גרנוט ציפה), the inventor of the Zippe-type centrifuge, is an anagram of the word "centrifuge" (צנטריפוגה). The sentence "Name is Anu Garg", referring to anagrammer and founder of wordsmith.org Anu Garg, can be rearranged to spell "Anagram genius". Games and puzzles Anagrams are in themselves a recreational activity, but they also make up part of many other games, puzzles and game shows. The Jumble is a puzzle found in many newspapers in the United States requiring the unscrambling of letters to find the solution. Cryptic crossword puzzles frequently use anagrammatic clues, usually indicating that they are anagrams by the inclusion of a descriptive term like "confused" or "in disarray". An example would be Businessman burst into tears (9 letters). The solution, stationer, is an anagram of into tears, the letters of which have burst out of their original arrangement to form the name of a type of businessman. Numerous other games and contests involve some element of anagram formation as a basic skill. Some examples: In Anagrams, players flip tiles over one at a time and race to take words. They can "steal" each other's words by rearranging the letters and extending the words. In a version of Scrabble called Clabbers, the name itself is an anagram of Scrabble. Tiles may be placed in any order on the board as long as they anagram to a valid word. On the British game show Countdown, contestants are given 30 seconds to make the longest word from nine random letters. In Boggle, players make constrained words from a grid of sixteen random letters, by joining adjacent cubes. On the British game show BrainTeaser, contestants are shown a word broken into randomly arranged segments and must announce the whole word. At the end of the game there is a "Pyramid" which starts with a three-letter word. A letter appears in the line below to which the player must add the existing letters to find a solution. The pattern continues until the player reaches the final eight-letter anagram. The player wins the game by solving all the anagrams within the allotted time. In Bananagrams, players place tiles from a pool into crossword-style word arrangements in a race to see who can finish the pool of tiles first. Ciphers Multiple anagramming is a technique used to solve some kinds of cryptograms, such as a permutation cipher, a transposition cipher, and the Jefferson disk. Solutions may be computationally found using a Jumble algorithm. Methods of construction Sometimes, it is possible to "see" anagrams in words, unaided by tools, though the more letters involved the more difficult this becomes. The difficulty is that for a word of different letters, there are (factorial of ) different permutations and so different anagrams of the word. Anagram dictionaries can also be used. Computer programs, known as "anagram search", "anagram servers", "anagram solvers", offer a much faster route to creating anagrams, and a large number of these programs are available on the Internet. Some programs use the Anatree algorithm to compute anagrams efficiently. The program or server carries out an exhaustive search of a database of words, to produce a list containing every possible combination of words or phrases from the input word or phrase using a jumble algorithm. Some programs (such as Lexpert) restrict to one-word answers. Many anagram servers (for example, The Words Oracle) can control the search results, by excluding or including certain words, limiting the number or length of words in each anagram, or limiting the number of results. Anagram solvers are often banned from online anagram games. The disadvantage of computer anagram solvers, especially when applied to multi-word anagrams, is their poor understanding of the meaning of the words they are manipulating. They usually cannot filter out meaningful or appropriate anagrams from large numbers of nonsensical word combinations. Some servers attempt to improve on this using statistical techniques that try to combine only words that appear together often. This approach provides only limited success since it fails to recognize ironic and humorous combinations. Some anagrammatists indicate the method they used. Anagrams constructed without the aid of a computer are noted as having been done "manually" or "by hand"; those made by utilizing a computer may be noted "by machine" or "by computer", or may indicate the name of the computer program (using Anagram Genius). There are also a few "natural" instances: English words unconsciously created by switching letters around. The French chaise longue ("long chair") became the American "chaise lounge" by metathesis (transposition of letters and/or sounds). It has also been speculated that the English "curd" comes from the Latin crudus ("raw"). Similarly, the ancient English word for bird was "brid". Notable anagrammatists The French king Louis XIII had a man named Thomas Billon appointed as his Royal Anagrammatist with an annual salary of 1200 pounds. Among contemporary anagrammers, Anu Garg, created an Internet Anagram Server in 1994 together with the satirical anagram-based newspaper The Anagram Times. Mike Keith has anagrammed the complete text of Moby Dick. He, along with Richard Brodie, has published The Anagrammed Bible that includes anagrammed version of many books of the Bible. Popular television personality Dick Cavett is known for his anagrams of famous celebrities such as Alec Guinness and Spiro Agnew. Anagram animation An animated anagram displays the letters of a word or phrase moving into their new positions. See also Acronym Ambigram Anagrammatic poem Anagrams, a board game Ananym Blanagram Constrained writing Isogram Letter bank Lipogram List of geographic anagrams and ananyms List of taxa named by anagrams London Underground anagram map Palindrome Pangram Rebus Sator Square Spoonerism Tautonym Word play References Further reading Henry Benjamin Wheatley. Of Anagrams: A Monograph Treating of Their History from the Earliest Ages to the Present Time. Williams & Norgate, 1862. Word Ways: The Journal of Recreational Linguistics. Greenwood Periodicals et al., 1968–. . Howard W. Bergerson. Palindromes and Anagrams. Dover Publications, 1973. . External links AnagramThis - An ad-free online anagram creator

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https://en.wikipedia.org/wiki/Andr%C3%A9-Marie%20Amp%C3%A8re

André-Marie Ampère

André-Marie Ampère (, , ; 20 January 177510 June 1836) was a French physicist and mathematician who was one of the founders of the science of classical electromagnetism, which he referred to as "electrodynamics". He is also the inventor of numerous applications, such as the solenoid (a term coined by him) and the electrical telegraph. As an autodidact, Ampère was a member of the French Academy of Sciences and professor at the École polytechnique and the Collège de France. The SI unit of measurement of electric current, the ampere, is named after him. His name is also one of the 72 names inscribed on the Eiffel Tower. Early life André-Marie Ampère was born on 20 January 1775 to Jean-Jacques Ampère, a prosperous businessman, and Jeanne Antoinette Desutières-Sarcey Ampère, during the height of the French Enlightenment. He spent his childhood and adolescence at the family property at Poleymieux-au-Mont-d'Or near Lyon. Jean-Jacques Ampère, a successful merchant, was an admirer of the philosophy of Jean-Jacques Rousseau, whose theories of education (as outlined in his treatise Émile) were the basis of Ampère's education. Rousseau believed that young boys should avoid formal schooling and pursue instead a "direct education from nature." Ampère's father actualized this ideal by allowing his son to educate himself within the walls of his well-stocked library. French Enlightenment masterpieces such as Georges-Louis Leclerc, comte de Buffon's Histoire naturelle, générale et particulière (begun in 1749) and Denis Diderot and Jean le Rond d'Alembert's Encyclopédie (volumes added between 1751 and 1772) thus became Ampère's schoolmasters. The young Ampère, however, soon resumed his Latin lessons, which enabled him to master the works of Leonhard Euler and Daniel Bernoulli. French Revolution In addition, Ampère used his access to the latest books to begin teaching himself advanced mathematics at age 12. In later life Ampère claimed that he knew as much about mathematics and science when he was eighteen as ever he knew, but as a polymath, his reading embraced history, travels, poetry, philosophy, and the natural sciences. His mother was a devout Catholic, so Ampère was also initiated into the Catholic faith along with Enlightenment science. The French Revolution (1789–99) that began during his youth was also influential: Ampère's father was called into public service by the new revolutionary government, becoming a justice of the peace in a small town near Lyon. When the Jacobin faction seized control of the Revolutionary government in 1792, his father Jean-Jacques Ampère resisted the new political tides, and he was guillotined on 24 November 1793, as part of the Jacobin purges of the period. In 1796, Ampère met Julie Carron and, in 1799, they were married. Ampère took his first regular job in 1799 as a mathematics teacher, which gave him the financial security to marry Carron and father his first child, Jean-Jacques (named after his father), the next year. (Jean-Jacques Ampère eventually achieved his own fame as a scholar of languages.) Ampère's maturation corresponded with the transition to the Napoleonic regime in France, and the young father and teacher found new opportunities for success within the technocratic structures favoured by the new French First Consul. In 1802, Ampère was appointed a professor of physics and chemistry at the École Centrale in Bourg-en-Bresse, leaving his ailing wife and infant son Jean-Jacques Antoine Ampère in Lyon. He used his time in Bourg to research mathematics, producing Considérations sur la théorie mathématique du jeu (1802; "Considerations on the Mathematical Theory of Games"), a treatise on mathematical probability that he sent to the Paris Academy of Sciences in 1803. Teaching career After the death of his wife in July 1803, Ampère moved to Paris, where he began a tutoring post at the new École Polytechnique in 1804. Despite his lack of formal qualifications, Ampère was appointed a professor of mathematics at the school in 1809. As well as holding positions at this school until 1828, in 1819 and 1820 Ampère offered courses in philosophy and astronomy, respectively, at the University of Paris, and in 1824 he was elected to the prestigious chair in experimental physics at the Collège de France. In 1814, Ampère was invited to join the class of mathematicians in the new Institut Impérial, the umbrella under which the reformed state Academy of Sciences would sit. Ampère engaged in a diverse array of scientific inquiries during the years leading up to his election to the academy—writing papers and engaging in topics from mathematics and philosophy to chemistry and astronomy, which was customary among the leading scientific intellectuals of the day. Ampère claimed that "at eighteen years he found three culminating points in his life, his First Communion, the reading of Antoine Leonard Thomas's "Eulogy of Descartes", and the Taking of the Bastille. On the day of his wife's death he wrote two verses from the Psalms, and the prayer, 'O Lord, God of Mercy, unite me in Heaven with those whom you have permitted me to love on earth.' In times of duress he would take refuge in the reading of the Bible and the Fathers of the Church." A lay Catholic, he took for a time into his family the young student Frédéric Ozanam (1813–1853), one of the founders of the Conference of Charity, later known as the Society of Saint Vincent de Paul. Ozanam would much later be beatified by Pope John Paul II in 1998. Through Ampère, Ozanam had contact with leaders of the neo-Catholic movement, such as François-René de Chateaubriand, Jean-Baptiste Henri Lacordaire, and Charles Forbes René de Montalembert. Work in electromagnetism In September 1820, Ampère's friend and eventual eulogist François Arago showed the members of the French Academy of Sciences the surprising discovery by Danish physicist Hans Christian Ørsted that a magnetic needle is deflected by an adjacent electric current. Ampère began developing a mathematical and physical theory to understand the relationship between electricity and magnetism. Furthering Ørsted's experimental work, Ampère showed that two parallel wires carrying electric currents attract or repel each other, depending on whether the currents flow in the same or opposite directions, respectively - this laid the foundation of electrodynamics. He also applied mathematics in generalizing physical laws from these experimental results. The most important of these was the principle that came to be called Ampère's law, which states that the mutual action of two lengths of current-carrying wire is proportional to their lengths and to the intensities of their currents. Ampère also applied this same principle to magnetism, showing the harmony between his law and French physicist Charles Augustin de Coulomb's law of electric action. Ampère's devotion to, and skill with, experimental techniques anchored his science within the emerging fields of experimental physics. Ampère also provided a physical understanding of the electromagnetic relationship, theorizing the existence of an "electrodynamic molecule" (the forerunner of the idea of the electron) that served as the component element of both electricity and magnetism. Using this physical explanation of electromagnetic motion, Ampère developed a physical account of electromagnetic phenomena that was both empirically demonstrable and mathematically predictive. Almost 100 years later, in 1915, Albert Einstein together with Wander Johannes de Haas made the proof of the correctness of Ampère's hypothesis through the Einstein–de Haas effect. In 1827, Ampère published his magnum opus, Mémoire sur la théorie mathématique des phénomènes électrodynamiques uniquement déduite de l'experience (Memoir on the Mathematical Theory of Electrodynamic Phenomena, Uniquely Deduced from Experience), the work that coined the name of his new science, electrodynamics, and became known ever after as its founding treatise. In 1827, Ampère was elected a Foreign Member of the Royal Society and in 1828, a foreign member of the Royal Swedish Academy of Science. Probably the highest recognition came from James Clerk Maxwell, who in his Treatise on Electricity and Magnetism named Ampère "the Newton of electricity". Honours 8.10.1825: Member of the Royal Academy of Science, Letters and Fine Arts of Belgium. Legacy An international convention, signed at the 1881 International Exposition of Electricity, established the ampere as one of the standard units of electrical measurement, in recognition of his contribution to the creation of modern electrical science and along with the coulomb, volt, ohm, watt and farad, which are named, respectively, after Ampère's contemporaries Charles-Augustin de Coulomb of France, Alessandro Volta of Italy, Georg Ohm of Germany, James Watt of Scotland and Michael Faraday of England. Ampère's name is one of the 72 names inscribed on the Eiffel Tower. Many streets and squares are named after Ampère, as are schools, a Lyon metro station, a graphics processing unit microarchitecture, a mountain on the moon and an electric ferry in Norway. Writings Considérations sur la théorie mathématique du jeu, Perisse, Lyon Paris 1802, online lesen im Internet-Archiv Partial translations: Magie, W.M. (1963). A Source Book in Physics. Harvard: Cambridge MA. pp. 446–460. . Complete translations: References Further reading (EPUB) External links Ampère and the history of electricity – a French-language, edited by CNRS, site with Ampère's correspondence (full text and critical edition with links to manuscripts pictures, more than 1000 letters), an Ampère bibliography, experiments, and 3D simulations Ampère Museum – a French-language site from the museum in Poleymieux-au-Mont-d'or, near Lyon, France Ampere's Electronics Includes complete English translation of Theory of Electrodynamic Phenomena "Société des Amis d'André-Marie Ampère", a French society dedicated to maintain the memory of André-Marie Ampère and in charge of the Ampère Museum. Catholic Encyclopedia on André Marie Ampère Electrical units history. 1775 births 1836 deaths Scientists from Lyon Electrostatics 19th-century French physicists People associated with electricity Independent scientists French Roman Catholics Academic staff of the Collège de France Foreign Members of the Royal Society Fellows of the Royal Society of Edinburgh Members of the French Academy of Sciences Members of the Royal Academy of Belgium Members of the Royal Swedish Academy of Sciences Honorary members of the Saint Petersburg Academy of Sciences Burials at Montmartre Cemetery Magneticians Academic staff of École Polytechnique

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https://en.wikipedia.org/wiki/Ammonia

Ammonia

Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula . A stable binary hydride and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous waste, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to fertilisers. Around 70% of ammonia produced industrially is used to make fertilisers in various forms and composition, such as urea and diammonium phosphate. Ammonia in pure form is also applied directly into the soil. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceutical products and is used in many commercial cleaning products. It is mainly collected by downward displacement of both air and water. Although common in nature—both terrestrially and in the outer planets of the Solar System—and in wide use, ammonia is both caustic and hazardous in its concentrated form. In many countries it is classified as an extremely hazardous substance, and is subject to strict reporting requirements by facilities that produce, store, or use it in significant quantities. The global industrial production of ammonia in 2021 was 235 million tonnes. Industrial ammonia is sold either as ammonia liquor (usually 28% ammonia in water) or as pressurised or refrigerated anhydrous liquid ammonia transported in tank cars or cylinders. For fundamental reasons, the production of ammonia from the elements hydrogen and nitrogen is difficult, requiring high pressures and high temperatures. The Haber process that enabled industrial production was invented at the beginning of the 20th century, revolutionizing agriculture. boils at at a pressure of one atmosphere, so the liquid must be stored under pressure or at low temperature. Household ammonia or ammonium hydroxide is a solution of in water. The concentration of such solutions is measured in units of the Baumé scale (density), with 26 degrees Baumé (about 30% of ammonia by weight at ) being the typical high-concentration commercial product. Etymology Pliny, in Book XXXI of his Natural History, refers to a salt named hammoniacum, so called because of its proximity to the nearby Temple of Jupiter Amun (Greek Ἄμμων Ammon) in the Roman province of Cyrenaica. However, the description Pliny gives of the salt does not conform to the properties of ammonium chloride. According to Herbert Hoover's commentary in his English translation of Georgius Agricola's De re metallica, it is likely to have been common sea salt. In any case, that salt ultimately gave ammonia and ammonium compounds their name. Natural occurrence Ammonia is a chemical found in trace quantities on Earth, being produced from nitrogenous animal and vegetable matter. Ammonia and ammonium salts are also found in small quantities in rainwater, whereas ammonium chloride (sal ammoniac), and ammonium sulfate are found in volcanic districts. Crystals of ammonium bicarbonate have been found in Patagonia guano. Ammonia is also found throughout the Solar System on Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto, among other places: on smaller, icy bodies such as Pluto, ammonia can act as a geologically important antifreeze, as a mixture of water and ammonia can have a melting point as low as if the ammonia concentration is high enough and thus allow such bodies to retain internal oceans and active geology at a far lower temperature than would be possible with water alone. Substances containing ammonia, or those that are similar to it, are called ammoniacal. Properties Ammonia is a colourless gas with a characteristically pungent smell. It is lighter than air, its density being 0.589 times that of air. It is easily liquefied due to the strong hydrogen bonding between molecules. Gaseous ammonia turns to a colourless liquid, which boils at , and freezes to colourless crystals at . Little data is available at very high temperatures and pressures, such as supercritical conditions. Solid The crystal symmetry is cubic, Pearson symbol cP16, space group P213 No.198, lattice constant 0.5125 nm. Liquid Liquid ammonia possesses strong ionising powers reflecting its high ε of 22. Liquid ammonia has a very high standard enthalpy change of vapourization (23.35 kJ/mol; for comparison, water's is 40.65 kJ/mol, methane 8.19 kJ/mol and phosphine 14.6 kJ/mol) and can therefore be used in laboratories in uninsulated vessels without additional refrigeration. See liquid ammonia as a solvent. Solvent properties Ammonia readily dissolves in water. In an aqueous solution, it can be expelled by boiling. The aqueous solution of ammonia is basic. The maximum concentration of ammonia in water (a saturated solution) has a density of 0.880 g/cm3 and is often known as '.880 ammonia'. Table of thermal and physical properties of saturated liquid ammonia: Table of thermal and physical properties of ammonia () at atmospheric pressure: Decomposition At high temperature and in the presence of a suitable catalyst or in a pressurised vessel with constant volume and high temperature (e.g. ), ammonia is decomposed into its constituent elements. Decomposition of ammonia is a slightly endothermic process requiring 23 kJ/mol (5.5 kcal/mol) of ammonia, and yields hydrogen and nitrogen gas. Ammonia can also be used as a source of hydrogen for acid fuel cells if the unreacted ammonia can be removed. Ruthenium and platinum catalysts were found to be the most active, whereas supported Ni catalysts were less active. Structure The ammonia molecule has a trigonal pyramidal shape as predicted by the valence shell electron pair repulsion theory (VSEPR theory) with an experimentally determined bond angle of 106.7°. The central nitrogen atom has five outer electrons with an additional electron from each hydrogen atom. This gives a total of eight electrons, or four electron pairs that are arranged tetrahedrally. Three of these electron pairs are used as bond pairs, which leaves one lone pair of electrons. The lone pair repels more strongly than bond pairs; therefore, the bond angle is not 109.5°, as expected for a regular tetrahedral arrangement, but 106.8°. This shape gives the molecule a dipole moment and makes it polar. The molecule's polarity, and especially its ability to form hydrogen bonds, makes ammonia highly miscible with water. The lone pair makes ammonia a base, a proton acceptor. Ammonia is moderately basic; a 1.0 M aqueous solution has a pH of 11.6, and if a strong acid is added to such a solution until the solution is neutral (), 99.4% of the ammonia molecules are protonated. Temperature and salinity also affect the proportion of ammonium . The latter has the shape of a regular tetrahedron and is isoelectronic with methane. The ammonia molecule readily undergoes nitrogen inversion at room temperature; a useful analogy is an umbrella turning itself inside out in a strong wind. The energy barrier to this inversion is 24.7 kJ/mol, and the resonance frequency is 23.79 GHz, corresponding to microwave radiation of a wavelength of 1.260 cm. The absorption at this frequency was the first microwave spectrum to be observed and was used in the first maser. Amphotericity One of the most characteristic properties of ammonia is its basicity. Ammonia is considered to be a weak base. It combines with acids to form ammonium salts; thus, with hydrochloric acid it forms ammonium chloride (sal ammoniac); with nitric acid, ammonium nitrate, etc. Perfectly dry ammonia gas will not combine with perfectly dry hydrogen chloride gas; moisture is necessary to bring about the reaction. As a demonstration experiment under air with ambient moisture, opened bottles of concentrated ammonia and hydrochloric acid solutions produce a cloud of ammonium chloride, which seems to appear 'out of nothing' as the salt aerosol forms where the two diffusing clouds of reagents meet between the two bottles. The salts produced by the action of ammonia on acids are known as the ammonium salts and all contain the ammonium ion (). Although ammonia is well known as a weak base, it can also act as an extremely weak acid. It is a protic substance and is capable of formation of amides (which contain the ion). For example, lithium dissolves in liquid ammonia to give a blue solution (solvated electron) of lithium amide: Self-dissociation Like water, liquid ammonia undergoes molecular autoionisation to form its acid and base conjugates: Ammonia often functions as a weak base, so it has some buffering ability. Shifts in pH will cause more or fewer ammonium cations () and amide anions () to be present in solution. At standard pressure and temperature, K = = 10−30. Combustion Ammonia does not burn readily or sustain combustion, except under narrow fuel-to-air mixtures of 15–25% air by volume. When mixed with oxygen, it burns with a pale yellowish-green flame. Ignition occurs when chlorine is passed into ammonia, forming nitrogen and hydrogen chloride; if chlorine is present in excess, then the highly explosive nitrogen trichloride () is also formed. The combustion of ammonia to form nitrogen and water is exothermic: , ΔH°r = −1267.20 kJ (or −316.8 kJ/mol if expressed per mol of ) The standard enthalpy change of combustion, ΔH°c, expressed per mole of ammonia and with condensation of the water formed, is −382.81 kJ/mol. Dinitrogen is the thermodynamic product of combustion: all nitrogen oxides are unstable with respect to and , which is the principle behind the catalytic converter. Nitrogen oxides can be formed as kinetic products in the presence of appropriate catalysts, a reaction of great industrial importance in the production of nitric acid: A subsequent reaction leads to : The combustion of ammonia in air is very difficult in the absence of a catalyst (such as platinum gauze or warm chromium(III) oxide), due to the relatively low heat of combustion, a lower laminar burning velocity, high auto-ignition temperature, high heat of vapourization, and a narrow flammability range. However, recent studies have shown that efficient and stable combustion of ammonia can be achieved using swirl combustors, thereby rekindling research interest in ammonia as a fuel for thermal power production. The flammable range of ammonia in dry air is 15.15–27.35% and in 100% relative humidity air is 15.95–26.55%. For studying the kinetics of ammonia combustion, knowledge of a detailed reliable reaction mechanism is required, but this has been challenging to obtain. Formation of other compounds Ammonia is a direct or indirect precursor to most manufactured nitrogen-containing compounds. In organic chemistry, ammonia can act as a nucleophile in substitution reactions. Amines can be formed by the reaction of ammonia with alkyl halides or with alcohols. The resulting − group is also nucleophilic so secondary and tertiary amines are often formed. When such multiple substitution is not desired, an excess of ammonia helps minimise it. For example, methylamine is prepared by the reaction of ammonia with chloromethane or with methanol. In both cases, dimethylamine and trimethylamine are co-produced. Ethanolamine is prepared by a ring-opening reaction with ethylene oxide, and when the reaction is allowed to go further it produces diethanolamine and triethanolamine. The reaction of ammonia with 2-bromopropanoic acid has been used to prepare racemic alanine in 70% yield. Amides can be prepared by the reaction of ammonia with carboxylic acid derivatives. For example, ammonia reacts with formic acid (HCOOH) to yield formamide () when heated. Acyl chlorides are the most reactive, but the ammonia must be present in at least a twofold excess to neutralise the hydrogen chloride formed. Esters and anhydrides also react with ammonia to form amides. Ammonium salts of carboxylic acids can be dehydrated to amides by heating to 150–200 °C as long as no thermally sensitive groups are present. The hydrogen in ammonia is susceptible to replacement by a myriad of substituents. When dry ammonia gas is heated with metallic sodium it converts to sodamide, . With chlorine, monochloramine is formed. Pentavalent ammonia is known as λ5-amine, nitrogen pentahydride, or more commonly, ammonium hydride . This crystalline solid is only stable under high pressure and decomposes back into trivalent ammonia (λ3-amine) and hydrogen gas at normal conditions. This substance was once investigated as a possible solid rocket fuel in 1966. Ammonia as a ligand Ammonia can act as a ligand in transition metal complexes. It is a pure σ-donor, in the middle of the spectrochemical series, and shows intermediate hard–soft behaviour (see also ECW model). Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots. For historical reasons, ammonia is named ammine in the nomenclature of coordination compounds. Some notable ammine complexes include tetraamminediaquacopper(II) (), a dark blue complex formed by adding ammonia to a solution of copper(II) salts. Tetraamminediaquacopper(II) hydroxide is known as Schweizer's reagent, and has the remarkable ability to dissolve cellulose. Diamminesilver(I) () is the active species in Tollens' reagent. Formation of this complex can also help to distinguish between precipitates of the different silver halides: silver chloride (AgCl) is soluble in dilute (2 M) ammonia solution, silver bromide (AgBr) is only soluble in concentrated ammonia solution, whereas silver iodide (AgI) is insoluble in aqueous ammonia. Ammine complexes of chromium(III) were known in the late 19th century, and formed the basis of Alfred Werner's revolutionary theory on the structure of coordination compounds. Werner noted only two isomers (fac- and mer-) of the complex could be formed, and concluded the ligands must be arranged around the metal ion at the vertices of an octahedron. This proposal has since been confirmed by X-ray crystallography. An ammine ligand bound to a metal ion is markedly more acidic than a free ammonia molecule, although deprotonation in aqueous solution is still rare. One example is the reaction of mercury(II) chloride with ammonia (Calomel reaction) where the resulting mercuric amidochloride is highly insoluble. Ammonia forms 1:1 adducts with a variety of Lewis acids such as , phenol, and . Ammonia is a hard base (HSAB theory) and its E & C parameters are EB = 2.31 and CB = 2.04. Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots. Detection and determination Ammonia in solution Ammonia and ammonium salts can be readily detected, in very minute traces, by the addition of Nessler's solution, which gives a distinct yellow colouration in the presence of the slightest trace of ammonia or ammonium salts. The amount of ammonia in ammonium salts can be estimated quantitatively by distillation of the salts with sodium (NaOH) or potassium hydroxide (KOH), the ammonia evolved being absorbed in a known volume of standard sulfuric acid and the excess of acid then determined volumetrically; or the ammonia may be absorbed in hydrochloric acid and the ammonium chloride so formed precipitated as ammonium hexachloroplatinate, . Gaseous ammonia Sulfur sticks are burnt to detect small leaks in industrial ammonia refrigeration systems. Larger quantities can be detected by warming the salts with a caustic alkali or with quicklime, when the characteristic smell of ammonia will be at once apparent. Ammonia is an irritant and irritation increases with concentration; the permissible exposure limit is 25 ppm, and lethal above 500 ppm. Higher concentrations are hardly detected by conventional detectors, the type of detector is chosen according to the sensitivity required (e.g. semiconductor, catalytic, electrochemical). Holographic sensors have been proposed for detecting concentrations up to 12.5% in volume. Ammoniacal nitrogen (NH3–N) Ammoniacal nitrogen (NH3–N) is a measure commonly used for testing the quantity of ammonium ions, derived naturally from ammonia, and returned to ammonia via organic processes, in water or waste liquids. It is a measure used mainly for quantifying values in waste treatment and water purification systems, as well as a measure of the health of natural and man-made water reserves. It is measured in units of mg/L (milligram per litre). History The ancient Greek historian Herodotus mentioned that there were outcrops of salt in an area of Libya that was inhabited by a people called the 'Ammonians' (now the Siwa oasis in northwestern Egypt, where salt lakes still exist). The Greek geographer Strabo also mentioned the salt from this region. However, the ancient authors Dioscorides, Apicius, Arrian, Synesius, and Aëtius of Amida described this salt as forming clear crystals that could be used for cooking and that were essentially rock salt. Hammoniacus sal appears in the writings of Pliny, although it is not known whether the term is identical with the more modern sal ammoniac (ammonium chloride). The fermentation of urine by bacteria produces a solution of ammonia; hence fermented urine was used in Classical Antiquity to wash cloth and clothing, to remove hair from hides in preparation for tanning, to serve as a mordant in dying cloth, and to remove rust from iron. It was also used by ancient dentists to wash teeth. In the form of sal ammoniac (نشادر, nushadir), ammonia was important to the Muslim alchemists. It was mentioned in the Book of Stones, likely written in the 9th century and attributed to Jābir ibn Hayyān. It was also important to the European alchemists of the 13th century, being mentioned by Albertus Magnus. It was also used by dyers in the Middle Ages in the form of fermented urine to alter the colour of vegetable dyes. In the 15th century, Basilius Valentinus showed that ammonia could be obtained by the action of alkalis on sal ammoniac. At a later period, when sal ammoniac was obtained by distilling the hooves and horns of oxen and neutralizing the resulting carbonate with hydrochloric acid, the name 'spirit of hartshorn' was applied to ammonia. Gaseous ammonia was first isolated by Joseph Black in 1756 by reacting sal ammoniac (ammonium chloride) with calcined magnesia (magnesium oxide). It was isolated again by Peter Woulfe in 1767, by Carl Wilhelm Scheele in 1770 and by Joseph Priestley in 1773 and was termed by him 'alkaline air'. Eleven years later in 1785, Claude Louis Berthollet ascertained its composition. The Haber–Bosch process to produce ammonia from the nitrogen in the air was developed by Fritz Haber and Carl Bosch in 1909 and patented in 1910. It was first used on an industrial scale in Germany during World War I, following the allied blockade that cut off the supply of nitrates from Chile. The ammonia was used to produce explosives to sustain war efforts. Before the availability of natural gas, hydrogen as a precursor to ammonia production was produced via the electrolysis of water or using the chloralkali process. With the advent of the steel industry in the 20th century, ammonia became a byproduct of the production of coking coal. Applications Solvent Liquid ammonia is the best-known and most widely studied nonaqueous ionising solvent. Its most conspicuous property is its ability to dissolve alkali metals to form highly coloured, electrically conductive solutions containing solvated electrons. Apart from these remarkable solutions, much of the chemistry in liquid ammonia can be classified by analogy with related reactions in aqueous solutions. Comparison of the physical properties of with those of water shows has the lower melting point, boiling point, density, viscosity, dielectric constant and electrical conductivity; this is due at least in part to the weaker hydrogen bonding in and because such bonding cannot form cross-linked networks, since each molecule has only one lone pair of electrons compared with two for each molecule. The ionic self-dissociation constant of liquid at −50 °C is about 10−33. Solubility of salts Liquid ammonia is an ionising solvent, although less so than water, and dissolves a range of ionic compounds, including many nitrates, nitrites, cyanides, thiocyanates, metal cyclopentadienyl complexes and metal bis(trimethylsilyl)amides. Most ammonium salts are soluble and act as acids in liquid ammonia solutions. The solubility of halide salts increases from fluoride to iodide. A saturated solution of ammonium nitrate (Divers' solution, named after Edward Divers) contains 0.83 mol solute per mole of ammonia and has a vapour pressure of less than 1 bar even at . Solutions of metals Liquid ammonia will dissolve all of the alkali metals and other electropositive metals such as Ca, Sr, Ba, Eu and Yb (also Mg using an electrolytic process). At low concentrations (<0.06 mol/L), deep blue solutions are formed: these contain metal cations and solvated electrons, free electrons that are surrounded by a cage of ammonia molecules. These solutions are very useful as strong reducing agents. At higher concentrations, the solutions are metallic in appearance and in electrical conductivity. At low temperatures, the two types of solution can coexist as immiscible phases. Redox properties of liquid ammonia The range of thermodynamic stability of liquid ammonia solutions is very narrow, as the potential for oxidation to dinitrogen, E° (), is only +0.04 V. In practice, both oxidation to dinitrogen and reduction to dihydrogen are slow. This is particularly true of reducing solutions: the solutions of the alkali metals mentioned above are stable for several days, slowly decomposing to the metal amide and dihydrogen. Most studies involving liquid ammonia solutions are done in reducing conditions; although oxidation of liquid ammonia is usually slow, there is still a risk of explosion, particularly if transition metal ions are present as possible catalysts. Fertiliser In the US , approximately 88% of ammonia was used as fertilisers either as its salts, solutions or anhydrously. When applied to soil, it helps provide increased yields of crops such as maize and wheat. 30% of agricultural nitrogen applied in the US is in the form of anhydrous ammonia, and worldwide, 110 million tonnes are applied each year. Precursor to nitrogenous compounds Ammonia is directly or indirectly the precursor to most nitrogen-containing compounds. Virtually all synthetic nitrogen compounds are derived from ammonia. An important derivative is nitric acid. This key material is generated via the Ostwald process by oxidation of ammonia with air over a platinum catalyst at , ≈9 atm. Nitric oxide is an intermediate in this conversion: Nitric acid is used for the production of fertilisers, explosives and many organonitrogen compounds. Ammonia is also used to make the following compounds: Hydrazine, in the Olin Raschig process and the peroxide process Hydrogen cyanide, in the BMA process and the Andrussow process Hydroxylamine and ammonium carbonate, in the Raschig process Phenol, in the Raschig–Hooker process Urea, in the Bosch–Meiser urea process and in Wöhler synthesis Amino acids, using Strecker amino-acid synthesis Acrylonitrile, in the Sohio process Ammonia can also be used to make compounds in reactions that are not specifically named. Examples of such compounds include ammonium perchlorate, ammonium nitrate, formamide, dinitrogen tetroxide, alprazolam, ethanolamine, ethyl carbamate, hexamethylenetetramine and ammonium bicarbonate. Cleansing agent Household 'ammonia' is a solution of in water, and is used as a general purpose cleaner for many surfaces. Because ammonia results in a relatively streak-free shine, one of its most common uses is to clean glass, porcelain, and stainless steel. It is also frequently used for cleaning ovens and for soaking items to loosen baked-on grime. Household ammonia ranges in concentration by weight from 5% to 10% ammonia. US manufacturers of cleaning products are required to provide the product's material safety data sheet that lists the concentration used. Solutions of ammonia (5–10% by weight) are used as household cleaners, particularly for glass. These solutions are irritating to the eyes and mucous membranes (respiratory and digestive tracts), and to a lesser extent the skin. Experts advise that caution be used to ensure the chemical is not mixed into any liquid containing bleach, due to the danger of forming toxic chloramine gas. Mixing with chlorine-containing products or strong oxidants, such as household bleach, can generate toxic chloramine fumes. Experts also warn not to use ammonia-based cleaners (such as glass or window cleaners) on car touchscreens, due to the risk of damage to the screen's anti-glare and anti-fingerprint coatings. Fermentation Solutions of ammonia ranging from 16% to 25% are used in the fermentation industry as a source of nitrogen for microorganisms and to adjust pH during fermentation. Antimicrobial agent for food products As early as in 1895, it was known that ammonia was 'strongly antiseptic ... it requires 1.4 grams per litre to preserve beef tea (broth).' In one study, anhydrous ammonia destroyed 99.999% of zoonotic bacteria in three types of animal feed, but not silage. Anhydrous ammonia is currently used commercially to reduce or eliminate microbial contamination of beef. Lean finely textured beef (popularly known as 'pink slime') in the beef industry is made from fatty beef trimmings (c. 50–70% fat) by removing the fat using heat and centrifugation, then treating it with ammonia to kill E. coli. The process was deemed effective and safe by the US Department of Agriculture based on a study that found that the treatment reduces E. coli to undetectable levels. There have been safety concerns about the process as well as consumer complaints about the taste and smell of ammonia-treated beef. Fuel Ammonia has been used as fuel, and is a proposed alternative to fossil fuels and hydrogen in the future. Compared to hydrogen, ammonia is easier to store. Compared to hydrogen as a fuel, ammonia is much more energy efficient, and could be produced, stored and delivered at a much lower cost than hydrogen, which must be kept compressed or as a cryogenic liquid. The raw energy density of liquid ammonia is 11.5 MJ/L, which is about a third that of diesel. Ammonia can be converted back to hydrogen to be used to power hydrogen fuel cells, or it may be used directly within high-temperature solid oxide direct ammonia fuel cells to provide efficient power sources that do not emit greenhouse gases. Ammonia to hydrogen conversion can be achieved through the sodium amide process or the catalytic decomposition of ammonia using solid catalysts. Ammonia engines or ammonia motors, using ammonia as a working fluid, have been proposed and occasionally used. The principle is similar to that used in a fireless locomotive, but with ammonia as the working fluid, instead of steam or compressed air. Ammonia engines were used experimentally in the 19th century by Goldsworthy Gurney in the UK and the St. Charles Avenue Streetcar line in New Orleans in the 1870s and 1880s, and during World War II ammonia was used to power buses in Belgium. Ammonia is sometimes proposed as a practical alternative to fossil fuel for internal combustion engines. However, ammonia cannot be easily used in existing Otto cycle engines because of its very narrow flammability range. Despite this, several tests have been run. Its high octane rating of 120 and low flame temperature allows the use of high compression ratios without a penalty of high production. Since ammonia contains no carbon, its combustion cannot produce carbon dioxide, carbon monoxide, hydrocarbons, or soot. Ammonia production currently creates 1.8% of global emissions. 'Green ammonia' is ammonia produced by using green hydrogen (hydrogen produced by electrolysis), whereas 'blue ammonia' is ammonia produced using blue hydrogen (hydrogen produced by steam methane reforming where the carbon dioxide has been captured and stored). Rocket engines have also been fueled by ammonia. The Reaction Motors XLR99 rocket engine that powered the hypersonic research aircraft used liquid ammonia. Although not as powerful as other fuels, it left no soot in the reusable rocket engine, and its density approximately matches the density of the oxidiser, liquid oxygen, which simplified the aircraft's design. In early August 2018, scientists from Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) announced the success of developing a process to release hydrogen from ammonia and harvest that at ultra-high purity as a fuel for cars. This uses a special membrane. Two demonstration fuel cell vehicles have the technology, a Hyundai Nexo and Toyota Mirai. In 2020, Saudi Arabia shipped 40 metric tons of liquid 'blue ammonia' to Japan for use as a fuel. It was produced as a by-product by petrochemical industries, and can be burned without giving off greenhouse gases. Its energy density by volume is nearly double that of liquid hydrogen. If the process of creating it can be scaled up via purely renewable resources, producing green ammonia, it could make a major difference in avoiding climate change. The company ACWA Power and the city of Neom have announced the construction of a green hydrogen and ammonia plant in 2020. Green ammonia is considered as a potential fuel for future container ships. In 2020, the companies DSME and MAN Energy Solutions announced the construction of an ammonia-based ship, DSME plans to commercialize it by 2025. The use of ammonia as a potential alternative fuel for aircraft jet engines is also being explored. Japan intends to implement a plan to develop ammonia co-firing technology that can increase the use of ammonia in power generation, as part of efforts to assist domestic and other Asian utilities to accelerate their transition to carbon neutrality. In October 2021, the first International Conference on Fuel Ammonia (ICFA2021) was held. In June 2022, IHI Corporation succeeded in reducing greenhouse gases by over 99% during combustion of liquid ammonia in a 2,000-kilowatt-class gas turbine achieving truly -free power generation. In July 2022, Quad nations of Japan, the U.S., Australia and India agreed to promote technological development for clean-burning hydrogen and ammonia as fuels at the security grouping's first energy meeting. , however, significant amounts of are produced. Nitrous oxide may also be a problem. Other Remediation of gaseous emissions Ammonia is used to scrub from the burning of fossil fuels, and the resulting product is converted to ammonium sulfate for use as fertiliser. Ammonia neutralises the nitrogen oxide () pollutants emitted by diesel engines. This technology, called SCR (selective catalytic reduction), relies on a vanadia-based catalyst. Ammonia may be used to mitigate gaseous spills of phosgene. As a hydrogen carrier Due to its attributes, being liquid at ambient temperature under its own vapour pressure and having high volumetric and gravimetric energy density, ammonia is considered a suitable carrier for hydrogen, and may be cheaper than direct transport of liquid hydrogen. Refrigeration – R717 Because of ammonia's vapourization properties, it is a useful refrigerant. It was commonly used before the popularisation of chlorofluorocarbons (Freons). Anhydrous ammonia is widely used in industrial refrigeration applications and hockey rinks because of its high energy efficiency and low cost. It suffers from the disadvantage of toxicity, and requiring corrosion resistant components, which restricts its domestic and small-scale use. Along with its use in modern vapour-compression refrigeration it is used in a mixture along with hydrogen and water in absorption refrigerators. The Kalina cycle, which is of growing importance to geothermal power plants, depends on the wide boiling range of the ammonia–water mixture. Ammonia coolant is also used in the S1 radiator aboard the International Space Station in two loops that are used to regulate the internal temperature and enable temperature-dependent experiments. The potential importance of ammonia as a refrigerant has increased with the discovery that vented CFCs and HFCs are extremely potent and stable greenhouse gases. Stimulant Ammonia, as the vapour released by smelling salts, has found significant use as a respiratory stimulant. Ammonia is commonly used in the illegal manufacture of methamphetamine through a Birch reduction. The Birch method of making methamphetamine is dangerous because the alkali metal and liquid ammonia are both extremely reactive, and the temperature of liquid ammonia makes it susceptible to explosive boiling when reactants are added. Textile Liquid ammonia is used for treatment of cotton materials, giving properties like mercerisation, using alkalis. In particular, it is used for prewashing of wool. Lifting gas At standard temperature and pressure, ammonia is less dense than atmosphere and has approximately 45–48% of the lifting power of hydrogen or helium. Ammonia has sometimes been used to fill balloons as a lifting gas. Because of its relatively high boiling point (compared to helium and hydrogen), ammonia could potentially be refrigerated and liquefied aboard an airship to reduce lift and add ballast (and returned to a gas to add lift and reduce ballast). Fuming Ammonia has been used to darken quartersawn white oak in Arts & Crafts and Mission-style furniture. Ammonia fumes react with the natural tannins in the wood and cause it to change colour. Safety The US Occupational Safety and Health Administration (OSHA) has set a 15-minute exposure limit for gaseous ammonia of 35 ppm by volume in the environmental air and an 8-hour exposure limit of 25 ppm by volume. The National Institute for Occupational Safety and Health (NIOSH) recently reduced the IDLH (Immediately Dangerous to Life and Health, the level to which a healthy worker can be exposed for 30 minutes without suffering irreversible health effects) from 500 to 300 based on recent more conservative interpretations of original research in 1943. Other organisations have varying exposure levels. US Navy Standards [U.S. Bureau of Ships 1962] maximum allowable concentrations (MACs): for continuous exposure (60 days) is 25 ppm; for exposure of 1 hour is 400 ppm. Ammonia vapour has a sharp, irritating, pungent odor that acts as a warning of potentially dangerous exposure. The average odor threshold is 5 ppm, well below any danger or damage. Exposure to very high concentrations of gaseous ammonia can result in lung damage and death. Ammonia is regulated in the US as a non-flammable gas, but it meets the definition of a material that is toxic by inhalation and requires a hazardous safety permit when transported in quantities greater than . Liquid ammonia is dangerous because it is hygroscopic and because it can cause caustic burns. See for more information. Toxicity The toxicity of ammonia solutions does not usually cause problems for humans and other mammals, as a specific mechanism exists to prevent its build-up in the bloodstream. Ammonia is converted to carbamoyl phosphate by the enzyme carbamoyl phosphate synthetase, and then enters the urea cycle to be either incorporated into amino acids or excreted in the urine. Fish and amphibians lack this mechanism, as they can usually eliminate ammonia from their bodies by direct excretion. Ammonia even at dilute concentrations is highly toxic to aquatic animals, and for this reason it is classified as dangerous for the environment. Atmospheric ammonia plays a key role in the formation of fine particulate matter. Ammonia is a constituent of tobacco smoke. Coking wastewater Ammonia is present in coking wastewater streams, as a liquid by-product of the production of coke from coal. In some cases, the ammonia is discharged to the marine environment where it acts as a pollutant. The Whyalla steelworks in South Australia is one example of a coke-producing facility that discharges ammonia into marine waters. Aquaculture Ammonia toxicity is believed to be a cause of otherwise unexplained losses in fish hatcheries. Excess ammonia may accumulate and cause alteration of metabolism or increases in the body pH of the exposed organism. Tolerance varies among fish species. At lower concentrations, around 0.05 mg/L, un-ionised ammonia is harmful to fish species and can result in poor growth and feed conversion rates, reduced fecundity and fertility and increase stress and susceptibility to bacterial infections and diseases. Exposed to excess ammonia, fish may suffer loss of equilibrium, hyper-excitability, increased respiratory activity and oxygen uptake and increased heart rate. At concentrations exceeding 2.0 mg/L, ammonia causes gill and tissue damage, extreme lethargy, convulsions, coma, and death. Experiments have shown that the lethal concentration for a variety of fish species ranges from 0.2 to 2.0 mg/L. During winter, when reduced feeds are administered to aquaculture stock, ammonia levels can be higher. Lower ambient temperatures reduce the rate of algal photosynthesis so less ammonia is removed by any algae present. Within an aquaculture environment, especially at large scale, there is no fast-acting remedy to elevated ammonia levels. Prevention rather than correction is recommended to reduce harm to farmed fish and in open water systems, the surrounding environment. Storage information Similar to propane, anhydrous ammonia boils below room temperature when at atmospheric pressure. A storage vessel capable of is suitable to contain the liquid. Ammonia is used in numerous different industrial applications requiring carbon or stainless steel storage vessels. Ammonia with at least 0.2% by weight water content is not corrosive to carbon steel. carbon steel construction storage tanks with 0.2% by weight or more of water could last more than 50 years in service. Experts warn that ammonium compounds not be allowed to come in contact with bases (unless in an intended and contained reaction), as dangerous quantities of ammonia gas could be released. Laboratory The hazards of ammonia solutions depend on the concentration: 'dilute' ammonia solutions are usually 5–10% by weight (< 5.62 mol/L); 'concentrated' solutions are usually prepared at >25% by weight. A 25% (by weight) solution has a density of 0.907 g/cm3, and a solution that has a lower density will be more concentrated. The European Union classification of ammonia solutions is given in the table. The ammonia vapour from concentrated ammonia solutions is severely irritating to the eyes and the respiratory tract, and experts warn that these solutions only be handled in a fume hood. Saturated ('0.880' – see ) solutions can develop a significant pressure inside a closed bottle in warm weather, and experts also warn that the bottle be opened with care. This is not usually a problem for 25% ('0.900') solutions. Experts warn that ammonia solutions not be mixed with halogens, as toxic and/or explosive products are formed. Experts also warn that prolonged contact of ammonia solutions with silver, mercury or iodide salts can also lead to explosive products: such mixtures are often formed in qualitative inorganic analysis, and that it needs to be lightly acidified but not concentrated (<6% w/v) before disposal once the test is completed. Laboratory use of anhydrous ammonia (gas or liquid) Anhydrous ammonia is classified as toxic (T) and dangerous for the environment (N). The gas is flammable (autoignition temperature: 651 °C) and can form explosive mixtures with air (16–25%). The permissible exposure limit (PEL) in the United States is 50 ppm (35 mg/m3), while the IDLH concentration is estimated at 300 ppm. Repeated exposure to ammonia lowers the sensitivity to the smell of the gas: normally the odour is detectable at concentrations of less than 50 ppm, but desensitised individuals may not detect it even at concentrations of 100 ppm. Anhydrous ammonia corrodes copper- and zinc-containing alloys, which makes brass fittings not appropriate for handling the gas. Liquid ammonia can also attack rubber and certain plastics. Ammonia reacts violently with the halogens. Nitrogen triiodide, a primary high explosive, is formed when ammonia comes in contact with iodine. Ammonia causes the explosive polymerisation of ethylene oxide. It also forms explosive fulminating compounds with compounds of gold, silver, mercury, germanium or tellurium, and with stibine. Violent reactions have also been reported with acetaldehyde, hypochlorite solutions, potassium ferricyanide and peroxides. Production Ammonia has one of the highest rates of production of any inorganic chemical. Production is sometimes expressed in terms of 'fixed nitrogen'. Global production was estimated as being 160 million tonnes in 2020 (147 tons of fixed nitrogen). China accounted for 26.5% of that, followed by Russia at 11.0%, the United States at 9.5%, and India at 8.3%. Before the start of World War I, most ammonia was obtained by the dry distillation of nitrogenous vegetable and animal waste products, including camel dung, where it was distilled by the reduction of nitrous acid and nitrites with hydrogen; in addition, it was produced by the distillation of coal, and also by the decomposition of ammonium salts by alkaline hydroxides such as quicklime: For small scale laboratory synthesis, one can heat urea and calcium hydroxide: Haber–Bosch Electrochemical Ammonia can be synthesized electrochemically. The only required inputs are sources of nitrogen (potentially atmospheric) and hydrogen (water), allowing generation at the point of use. The availability of renewable energy creates the possibility of zero emission production. 'Green Ammonia' is a name for ammonia produced from hydrogen that is in turn produced from carbon-free sources such as electrolysis of water. Ammonia from this source can be used as a liquid fuel with zero contribution to global climate change. Another electrochemical synthesis mode involves the reductive formation of lithium nitride, which can be protonated to ammonia, given a proton source. Ethanol has been used as such a source, although it may degrade. The first use of this chemistry was reported in 1930, where lithium solutions in ethanol were used to produce ammonia at pressures of up to 1000 bar. In 1994, Tsuneto et al. used lithium electrodeposition in tetrahydrofuran to synthesize ammonia at more moderate pressures with reasonable Faradaic efficiency. Other studies have since used the ethanol–tetrahydrofuran system for electrochemical ammonia synthesis. In 2019, Lazouski et al. proposed a mechanism to explain observed ammonia formation kinetics. In 2020, Lazouski et al. developed a solvent-agnostic gas diffusion electrode to improve nitrogen transport to the reactive lithium. The study observed production rates of up to 30 ± 5 nmol/s/cm2 and Faradaic efficiencies of up to 47.5 ± 4% at ambient temperature and 1 bar pressure. In 2021, Suryanto et al. replaced ethanol with a tetraalkyl phosphonium salt. This cation can stably undergo deprotonation–reprotonation cycles, while it enhances the medium's ionic conductivity. The study observed production rates of 53 ± 1 nmol/s/cm2 at 69 ± 1% faradaic efficiency experiments under 0.5-bar hydrogen and 19.5-bar nitrogen partial pressure at ambient temperature. Role in biological systems and human disease Ammonia is both a metabolic waste and a metabolic input throughout the biosphere. It is an important source of nitrogen for living systems. Although atmospheric nitrogen abounds (more than 75%), few living creatures are capable of using atmospheric nitrogen in its diatomic form, gas. Therefore, nitrogen fixation is required for the synthesis of amino acids, which are the building blocks of protein. Some plants rely on ammonia and other nitrogenous wastes incorporated into the soil by decaying matter. Others, such as nitrogen-fixing legumes, benefit from symbiotic relationships with rhizobia bacteria that create ammonia from atmospheric nitrogen. In humans, inhaling ammonia in high concentrations can be fatal. Exposure to ammonia can cause headaches, edema, impaired memory, seizures and coma as it is neurotoxic in nature. Biosynthesis In certain organisms, ammonia is produced from atmospheric nitrogen by enzymes called nitrogenases. The overall process is called nitrogen fixation. Intense effort has been directed toward understanding the mechanism of biological nitrogen fixation. The scientific interest in this problem is motivated by the unusual structure of the active site of the enzyme, which consists of an ensemble. Ammonia is also a metabolic product of amino acid deamination catalyzed by enzymes such as glutamate dehydrogenase 1. Ammonia excretion is common in aquatic animals. In humans, it is quickly converted to urea (by liver), which is much less toxic, particularly less basic. This urea is a major component of the dry weight of urine. Most reptiles, birds, insects, and snails excrete uric acid solely as nitrogenous waste. Physiology Ammonia plays a role in both normal and abnormal animal physiology. It is biosynthesised through normal amino acid metabolism and is toxic in high concentrations. The liver converts ammonia to urea through a series of reactions known as the urea cycle. Liver dysfunction, such as that seen in cirrhosis, may lead to elevated amounts of ammonia in the blood (hyperammonemia). Likewise, defects in the enzymes responsible for the urea cycle, such as ornithine transcarbamylase, lead to hyperammonemia. Hyperammonemia contributes to the confusion and coma of hepatic encephalopathy, as well as the neurologic disease common in people with urea cycle defects and organic acidurias. Ammonia is important for normal animal acid/base balance. After formation of ammonium from glutamine, α-ketoglutarate may be degraded to produce two bicarbonate ions, which are then available as buffers for dietary acids. Ammonium is excreted in the urine, resulting in net acid loss. Ammonia may itself diffuse across the renal tubules, combine with a hydrogen ion, and thus allow for further acid excretion. Excretion Ammonium ions are a toxic waste product of metabolism in animals. In fish and aquatic invertebrates, it is excreted directly into the water. In mammals, sharks, and amphibians, it is converted in the urea cycle to urea, which is less toxic and can be stored more efficiently. In birds, reptiles, and terrestrial snails, metabolic ammonium is converted into uric acid, which is solid and can therefore be excreted with minimal water loss. Beyond Earth Ammonia has been detected in the atmospheres of the giant planets Jupiter, Saturn, Uranus and Neptune, along with other gases such as methane, hydrogen, and helium. The interior of Saturn may include frozen ammonia crystals. It is found on Deimos and Phobos – the two moons of Mars. Interstellar space Ammonia was first detected in interstellar space in 1968, based on microwave emissions from the direction of the galactic core. This was the first polyatomic molecule to be so detected. The sensitivity of the molecule to a broad range of excitations and the ease with which it can be observed in a number of regions has made ammonia one of the most important molecules for studies of molecular clouds. The relative intensity of the ammonia lines can be used to measure the temperature of the emitting medium. The following isotopic species of ammonia have been detected: , , , , and . The detection of triply deuterated ammonia was considered a surprise as deuterium is relatively scarce. It is thought that the low-temperature conditions allow this molecule to survive and accumulate. Since its interstellar discovery, has proved to be an invaluable spectroscopic tool in the study of the interstellar medium. With a large number of transitions sensitive to a wide range of excitation conditions, has been widely astronomically detected – its detection has been reported in hundreds of journal articles. Listed below is a sample of journal articles that highlights the range of detectors that have been used to identify ammonia. The study of interstellar ammonia has been important to a number of areas of research in the last few decades. Some of these are delineated below and primarily involve using ammonia as an interstellar thermometer. Interstellar formation mechanisms The interstellar abundance for ammonia has been measured for a variety of environments. The []/[] ratio has been estimated to range from 10−7 in small dark clouds up to 10−5 in the dense core of the Orion molecular cloud complex. Although a total of 18 total production routes have been proposed, the principal formation mechanism for interstellar is the reaction: The rate constant, k, of this reaction depends on the temperature of the environment, with a value of at 10 K. The rate constant was calculated from the formula . For the primary formation reaction, and . Assuming an abundance of and an electron abundance of 10−7 typical of molecular clouds, the formation will proceed at a rate of in a molecular cloud of total density . All other proposed formation reactions have rate constants of between two and 13 orders of magnitude smaller, making their contribution to the abundance of ammonia relatively insignificant. As an example of the minor contribution other formation reactions play, the reaction: has a rate constant of 2.2. Assuming densities of 105 and []/[] ratio of 10−7, this reaction proceeds at a rate of 2.2, more than three orders of magnitude slower than the primary reaction above. Some of the other possible formation reactions are: Interstellar destruction mechanisms There are 113 total proposed reactions leading to the destruction of . Of these, 39 were tabulated in extensive tables of the chemistry among C, N and O compounds. A review of interstellar ammonia cites the following reactions as the principal dissociation mechanisms: with rate constants of 4.39×10−9 and 2.2×10−9, respectively. The above equations (, ) run at a rate of 8.8×10−9 and 4.4×10−13, respectively. These calculations assumed the given rate constants and abundances of []/[] = 10−5, []/[] = 2×10−5, []/[] = 2×10−9, and total densities of n = 105, typical of cold, dense, molecular clouds. Clearly, between these two primary reactions, equation () is the dominant destruction reaction, with a rate ≈10,000 times faster than equation (). This is due to the relatively high abundance of . Single antenna detections Radio observations of from the Effelsberg 100-m Radio Telescope reveal that the ammonia line is separated into two components – a background ridge and an unresolved core. The background corresponds well with the locations previously detected CO. The 25 m Chilbolton telescope in England detected radio signatures of ammonia in H II regions, HNH2O masers, H–H objects, and other objects associated with star formation. A comparison of emission line widths indicates that turbulent or systematic velocities do not increase in the central cores of molecular clouds. Microwave radiation from ammonia was observed in several galactic objects including W3(OH), Orion A, W43, W51, and five sources in the galactic centre. The high detection rate indicates that this is a common molecule in the interstellar medium and that high-density regions are common in the galaxy. Interferometric studies VLA observations of in seven regions with high-velocity gaseous outflows revealed condensations of less than 0.1 pc in L1551, S140, and Cepheus A. Three individual condensations were detected in Cepheus A, one of them with a highly elongated shape. They may play an important role in creating the bipolar outflow in the region. Extragalactic ammonia was imaged using the VLA in IC 342. The hot gas has temperatures above 70 K, which was inferred from ammonia line ratios and appears to be closely associated with the innermost portions of the nuclear bar seen in CO. was also monitored by VLA toward a sample of four galactic ultracompact HII regions: G9.62+0.19, G10.47+0.03, G29.96-0.02, and G31.41+0.31. Based upon temperature and density diagnostics, it is concluded that in general such clumps are probably the sites of massive star formation in an early evolutionary phase prior to the development of an ultracompact HII region. Infrared detections Absorption at 2.97 micrometres due to solid ammonia was recorded from interstellar grains in the Becklin–Neugebauer Object and probably in NGC 2264-IR as well. This detection helped explain the physical shape of previously poorly understood and related ice absorption lines. A spectrum of the disk of Jupiter was obtained from the Kuiper Airborne Observatory, covering the 100 to 300 cm−1 spectral range. Analysis of the spectrum provides information on global mean properties of ammonia gas and an ammonia ice haze. A total of 149 dark cloud positions were surveyed for evidence of 'dense cores' by using the (J,K) = (1,1) rotating inversion line of NH3. In general, the cores are not spherically shaped, with aspect ratios ranging from 1.1 to 4.4. It is also found that cores with stars have broader lines than cores without stars. Ammonia has been detected in the Draco Nebula and in one or possibly two molecular clouds, which are associated with the high-latitude galactic infrared cirrus. The finding is significant because they may represent the birthplaces for the Population I metallicity B-type stars in the galactic halo that could have been borne in the galactic disk. Observations of nearby dark clouds By balancing and stimulated emission with spontaneous emission, it is possible to construct a relation between excitation temperature and density. Moreover, since the transitional levels of ammonia can be approximated by a 2-level system at low temperatures, this calculation is fairly simple. This premise can be applied to dark clouds, regions suspected of having extremely low temperatures and possible sites for future star formation. Detections of ammonia in dark clouds show very narrow linesindicative not only of low temperatures, but also of a low level of inner-cloud turbulence. Line ratio calculations provide a measurement of cloud temperature that is independent of previous CO observations. The ammonia observations were consistent with CO measurements of rotation temperatures of ≈10 K. With this, densities can be determined, and have been calculated to range between 104 and 105 cm−3 in dark clouds. Mapping of gives typical clouds sizes of 0.1 pc and masses near 1 solar mass. These cold, dense cores are the sites of future star formation. UC HII regions Ultra-compact HII regions are among the best tracers of high-mass star formation. The dense material surrounding UCHII regions is likely primarily molecular. Since a complete study of massive star formation necessarily involves the cloud from which the star formed, ammonia is an invaluable tool in understanding this surrounding molecular material. Since this molecular material can be spatially resolved, it is possible to constrain the heating/ionising sources, temperatures, masses, and sizes of the regions. Doppler-shifted velocity components allow for the separation of distinct regions of molecular gas that can trace outflows and hot cores originating from forming stars. Extragalactic detection Ammonia has been detected in external galaxies, and by simultaneously measuring several lines, it is possible to directly measure the gas temperature in these galaxies. Line ratios imply that gas temperatures are warm (≈50 K), originating from dense clouds with sizes of tens of parsecs. This picture is consistent with the picture within our Milky Way galaxyhot dense molecular cores form around newly forming stars embedded in larger clouds of molecular material on the scale of several hundred parsecs (giant molecular clouds; GMCs). See also Notes References Works cited Further reading External links International Chemical Safety Card 0414 (anhydrous ammonia), ilo.org. International Chemical Safety Card 0215 (aqueous solutions), ilo.org. Emergency Response to Ammonia Fertiliser Releases (Spills) for the Minnesota Department of Agriculture.ammoniaspills.org National Institute for Occupational Safety and Health – Ammonia Page, cdc.gov NIOSH Pocket Guide to Chemical Hazards – Ammonia, cdc.gov Ammonia, video Bases (chemistry) Foul-smelling chemicals Gaseous signaling molecules Household chemicals Industrial gases Inorganic solvents Nitrogen cycle Nitrogen hydrides Nitrogen(−III) compounds Refrigerants Toxicology

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https://en.wikipedia.org/wiki/Assembly%20language

Assembly language

In computer programming, assembly language (alternatively assembler language or symbolic machine code), often referred to simply as assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence between the instructions in the language and the architecture's machine code instructions. Assembly language usually has one statement per machine instruction (1:1), but constants, comments, assembler directives, symbolic labels of, e.g., memory locations, registers, and macros are generally also supported. The first assembly code in which a language is used to represent machine code instructions is found in Kathleen and Andrew Donald Booth's 1947 work, Coding for A.R.C.. Assembly code is converted into executable machine code by a utility program referred to as an assembler. The term "assembler" is generally attributed to Wilkes, Wheeler and Gill in their 1951 book The Preparation of Programs for an Electronic Digital Computer, who, however, used the term to mean "a program that assembles another program consisting of several sections into a single program". The conversion process is referred to as assembly, as in assembling the source code. The computational step when an assembler is processing a program is called assembly time. Because assembly depends on the machine code instructions, each assembly language is specific to a particular computer architecture. Sometimes there is more than one assembler for the same architecture, and sometimes an assembler is specific to an operating system or to particular operating systems. Most assembly languages do not provide specific syntax for operating system calls, and most assembly languages can be used universally with any operating system, as the language provides access to all the real capabilities of the processor, upon which all system call mechanisms ultimately rest. In contrast to assembly languages, most high-level programming languages are generally portable across multiple architectures but require interpreting or compiling, much more complicated tasks than assembling. In the first decades of computing, it was commonplace for both systems programming and application programming to take place entirely in assembly language. While still irreplaceable for some purposes, the majority of programming is now conducted in higher-level interpreted and compiled languages. In "No Silver Bullet", Fred Brooks summarised the effects of the switch away from assembly language programming: "Surely the most powerful stroke for software productivity, reliability, and simplicity has been the progressive use of high-level languages for programming. Most observers credit that development with at least a factor of five in productivity, and with concomitant gains in reliability, simplicity, and comprehensibility." Today, it is typical to use small amounts of assembly language code within larger systems implemented in a higher-level language, for performance reasons or to interact directly with hardware in ways unsupported by the higher-level language. For instance, just under 2% of version 4.9 of the Linux kernel source code is written in assembly; more than 97% is written in C. Assembly language syntax Assembly language uses a mnemonic to represent, e.g., each low-level machine instruction or opcode, each directive, typically also each architectural register, flag, etc. Some of the mnemonics may be built in and some user defined. Many operations require one or more operands in order to form a complete instruction. Most assemblers permit named constants, registers, and labels for program and memory locations, and can calculate expressions for operands. Thus, programmers are freed from tedious repetitive calculations and assembler programs are much more readable than machine code. Depending on the architecture, these elements may also be combined for specific instructions or addressing modes using offsets or other data as well as fixed addresses. Many assemblers offer additional mechanisms to facilitate program development, to control the assembly process, and to aid debugging. Some are column oriented, with specific fields in specific columns; this was very common for machines using punched cards in the 1950s and early 1960s. Some assemblers have free-form syntax, with fields separated by delimiters, e.g., punctuation, white space. Some assemblers are hybrid, with, e.g., labels, in a specific column and other fields separated by delimiters; this became more common than column oriented syntax in the 1960s. Terminology A macro assembler is an assembler that includes a macroinstruction facility so that (parameterized) assembly language text can be represented by a name, and that name can be used to insert the expanded text into other code. Open code refers to any assembler input outside of a macro definition. A cross assembler (see also cross compiler) is an assembler that is run on a computer or operating system (the host system) of a different type from the system on which the resulting code is to run (the target system). Cross-assembling facilitates the development of programs for systems that do not have the resources to support software development, such as an embedded system or a microcontroller. In such a case, the resulting object code must be transferred to the target system, via read-only memory (ROM, EPROM, etc.), a programmer (when the read-only memory is integrated in the device, as in microcontrollers), or a data link using either an exact bit-by-bit copy of the object code or a text-based representation of that code (such as Intel hex or Motorola S-record). A high-level assembler is a program that provides language abstractions more often associated with high-level languages, such as advanced control structures (IF/THEN/ELSE, DO CASE, etc.) and high-level abstract data types, including structures/records, unions, classes, and sets. A microassembler is a program that helps prepare a microprogram, called firmware, to control the low level operation of a computer. A meta-assembler is "a program that accepts the syntactic and semantic description of an assembly language, and generates an assembler for that language", or that accepts an assembler source file along with such a description and assembles the source file in accordance with that description. "Meta-Symbol" assemblers for the SDS 9 Series and SDS Sigma series of computers are meta-assemblers. Sperry Univac also provided a Meta-Assembler for the UNIVAC 1100/2200 series. inline assembler (or embedded assembler) is assembler code contained within a high-level language program. This is most often used in systems programs which need direct access to the hardware. Key concepts Assembler An assembler program creates object code by translating combinations of mnemonics and syntax for operations and addressing modes into their numerical equivalents. This representation typically includes an operation code ("opcode") as well as other control bits and data. The assembler also calculates constant expressions and resolves symbolic names for memory locations and other entities. The use of symbolic references is a key feature of assemblers, saving tedious calculations and manual address updates after program modifications. Most assemblers also include macro facilities for performing textual substitution – e.g., to generate common short sequences of instructions as inline, instead of called subroutines. Some assemblers may also be able to perform some simple types of instruction set-specific optimizations. One concrete example of this may be the ubiquitous x86 assemblers from various vendors. Called jump-sizing, most of them are able to perform jump-instruction replacements (long jumps replaced by short or relative jumps) in any number of passes, on request. Others may even do simple rearrangement or insertion of instructions, such as some assemblers for RISC architectures that can help optimize a sensible instruction scheduling to exploit the CPU pipeline as efficiently as possible. Assemblers have been available since the 1950s, as the first step above machine language and before high-level programming languages such as Fortran, Algol, COBOL and Lisp. There have also been several classes of translators and semi-automatic code generators with properties similar to both assembly and high-level languages, with Speedcode as perhaps one of the better-known examples. There may be several assemblers with different syntax for a particular CPU or instruction set architecture. For instance, an instruction to add memory data to a register in a x86-family processor might be add eax,[ebx], in original Intel syntax, whereas this would be written addl (%ebx),%eax in the AT&T syntax used by the GNU Assembler. Despite different appearances, different syntactic forms generally generate the same numeric machine code. A single assembler may also have different modes in order to support variations in syntactic forms as well as their exact semantic interpretations (such as FASM-syntax, TASM-syntax, ideal mode, etc., in the special case of x86 assembly programming). Number of passes There are two types of assemblers based on how many passes through the source are needed (how many times the assembler reads the source) to produce the object file. One-pass assemblers process the source code once. For symbols used before they are defined, the assembler will emit "errata" after the eventual definition, telling the linker or the loader to patch the locations where the as yet undefined symbols had been used. Multi-pass assemblers create a table with all symbols and their values in the first passes, then use the table in later passes to generate code. In both cases, the assembler must be able to determine the size of each instruction on the initial passes in order to calculate the addresses of subsequent symbols. This means that if the size of an operation referring to an operand defined later depends on the type or distance of the operand, the assembler will make a pessimistic estimate when first encountering the operation, and if necessary, pad it with one or more "no-operation" instructions in a later pass or the errata. In an assembler with peephole optimization, addresses may be recalculated between passes to allow replacing pessimistic code with code tailored to the exact distance from the target. The original reason for the use of one-pass assemblers was memory size and speed of assembly – often a second pass would require storing the symbol table in memory (to handle forward references), rewinding and rereading the program source on tape, or rereading a deck of cards or punched paper tape. Later computers with much larger memories (especially disc storage), had the space to perform all necessary processing without such re-reading. The advantage of the multi-pass assembler is that the absence of errata makes the linking process (or the program load if the assembler directly produces executable code) faster. Example: in the following code snippet, a one-pass assembler would be able to determine the address of the backward reference BKWD when assembling statement S2, but would not be able to determine the address of the forward reference FWD when assembling the branch statement S1; indeed, FWD may be undefined. A two-pass assembler would determine both addresses in pass 1, so they would be known when generating code in pass 2. B ... EQU * ... EQU * ... B High-level assemblers More sophisticated high-level assemblers provide language abstractions such as: High-level procedure/function declarations and invocations Advanced control structures (IF/THEN/ELSE, SWITCH) High-level abstract data types, including structures/records, unions, classes, and sets Sophisticated macro processing (although available on ordinary assemblers since the late 1950s for, e.g., the IBM 700 series and IBM 7000 series, and since the 1960s for IBM System/360 (S/360), amongst other machines) Object-oriented programming features such as classes, objects, abstraction, polymorphism, and inheritance See Language design below for more details. Assembly language A program written in assembly language consists of a series of mnemonic processor instructions and meta-statements (known variously as declarative operations, directives, pseudo-instructions, pseudo-operations and pseudo-ops), comments and data. Assembly language instructions usually consist of an opcode mnemonic followed by an operand, which might be a list of data, arguments or parameters. Some instructions may be "implied", which means the data upon which the instruction operates is implicitly defined by the instruction itself—such an instruction does not take an operand. The resulting statement is translated by an assembler into machine language instructions that can be loaded into memory and executed. For example, the instruction below tells an x86/IA-32 processor to move an immediate 8-bit value into a register. The binary code for this instruction is 10110 followed by a 3-bit identifier for which register to use. The identifier for the AL register is 000, so the following machine code loads the AL register with the data 01100001. 10110000 01100001 This binary computer code can be made more human-readable by expressing it in hexadecimal as follows. B0 61 Here, B0 means 'Move a copy of the following value into AL, and 61 is a hexadecimal representation of the value 01100001, which is 97 in decimal. Assembly language for the 8086 family provides the mnemonic MOV (an abbreviation of move) for instructions such as this, so the machine code above can be written as follows in assembly language, complete with an explanatory comment if required, after the semicolon. This is much easier to read and to remember. MOV AL, 61h ; Load AL with 97 decimal (61 hex) In some assembly languages (including this one) the same mnemonic, such as MOV, may be used for a family of related instructions for loading, copying and moving data, whether these are immediate values, values in registers, or memory locations pointed to by values in registers or by immediate (a.k.a. direct) addresses. Other assemblers may use separate opcode mnemonics such as L for "move memory to register", ST for "move register to memory", LR for "move register to register", MVI for "move immediate operand to memory", etc. If the same mnemonic is used for different instructions, that means that the mnemonic corresponds to several different binary instruction codes, excluding data (e.g. the 61h in this example), depending on the operands that follow the mnemonic. For example, for the x86/IA-32 CPUs, the Intel assembly language syntax MOV AL, AH represents an instruction that moves the contents of register AH into register AL. The hexadecimal form of this instruction is: 88 E0 The first byte, 88h, identifies a move between a byte-sized register and either another register or memory, and the second byte, E0h, is encoded (with three bit-fields) to specify that both operands are registers, the source is AH, and the destination is AL. In a case like this where the same mnemonic can represent more than one binary instruction, the assembler determines which instruction to generate by examining the operands. In the first example, the operand 61h is a valid hexadecimal numeric constant and is not a valid register name, so only the B0 instruction can be applicable. In the second example, the operand AH is a valid register name and not a valid numeric constant (hexadecimal, decimal, octal, or binary), so only the 88 instruction can be applicable. Assembly languages are always designed so that this sort of lack of ambiguity is universally enforced by their syntax. For example, in the Intel x86 assembly language, a hexadecimal constant must start with a numeral digit, so that the hexadecimal number 'A' (equal to decimal ten) would be written as 0Ah or 0AH, not AH, specifically so that it cannot appear to be the name of register AH. (The same rule also prevents ambiguity with the names of registers BH, CH, and DH, as well as with any user-defined symbol that ends with the letter H and otherwise contains only characters that are hexadecimal digits, such as the word "BEACH".) Returning to the original example, while the x86 opcode 10110000 (B0) copies an 8-bit value into the AL register, 10110001 (B1) moves it into CL and 10110010 (B2) does so into DL. Assembly language examples for these follow. MOV AL, 1h ; Load AL with immediate value 1 MOV CL, 2h ; Load CL with immediate value 2 MOV DL, 3h ; Load DL with immediate value 3 The syntax of MOV can also be more complex as the following examples show. MOV EAX, [EBX] ; Move the 4 bytes in memory at the address contained in EBX into EAX MOV [ESI+EAX], CL ; Move the contents of CL into the byte at address ESI+EAX MOV DS, DX ; Move the contents of DX into segment register DS In each case, the MOV mnemonic is translated directly into one of the opcodes 88-8C, 8E, A0-A3, B0-BF, C6 or C7 by an assembler, and the programmer normally does not have to know or remember which. Transforming assembly language into machine code is the job of an assembler, and the reverse can at least partially be achieved by a disassembler. Unlike high-level languages, there is a one-to-one correspondence between many simple assembly statements and machine language instructions. However, in some cases, an assembler may provide pseudoinstructions (essentially macros) which expand into several machine language instructions to provide commonly needed functionality. For example, for a machine that lacks a "branch if greater or equal" instruction, an assembler may provide a pseudoinstruction that expands to the machine's "set if less than" and "branch if zero (on the result of the set instruction)". Most full-featured assemblers also provide a rich macro language (discussed below) which is used by vendors and programmers to generate more complex code and data sequences. Since the information about pseudoinstructions and macros defined in the assembler environment is not present in the object program, a disassembler cannot reconstruct the macro and pseudoinstruction invocations but can only disassemble the actual machine instructions that the assembler generated from those abstract assembly-language entities. Likewise, since comments in the assembly language source file are ignored by the assembler and have no effect on the object code it generates, a disassembler is always completely unable to recover source comments. Each computer architecture has its own machine language. Computers differ in the number and type of operations they support, in the different sizes and numbers of registers, and in the representations of data in storage. While most general-purpose computers are able to carry out essentially the same functionality, the ways they do so differ; the corresponding assembly languages reflect these differences. Multiple sets of mnemonics or assembly-language syntax may exist for a single instruction set, typically instantiated in different assembler programs. In these cases, the most popular one is usually that supplied by the CPU manufacturer and used in its documentation. Two examples of CPUs that have two different sets of mnemonics are the Intel 8080 family and the Intel 8086/8088. Because Intel claimed copyright on its assembly language mnemonics (on each page of their documentation published in the 1970s and early 1980s, at least), some companies that independently produced CPUs compatible with Intel instruction sets invented their own mnemonics. The Zilog Z80 CPU, an enhancement of the Intel 8080A, supports all the 8080A instructions plus many more; Zilog invented an entirely new assembly language, not only for the new instructions but also for all of the 8080A instructions. For example, where Intel uses the mnemonics MOV, MVI, LDA, STA, LXI, LDAX, STAX, LHLD, and SHLD for various data transfer instructions, the Z80 assembly language uses the mnemonic LD for all of them. A similar case is the NEC V20 and V30 CPUs, enhanced copies of the Intel 8086 and 8088, respectively. Like Zilog with the Z80, NEC invented new mnemonics for all of the 8086 and 8088 instructions, to avoid accusations of infringement of Intel's copyright. (It is questionable whether such copyrights can be valid, and later CPU companies such as AMD and Cyrix republished Intel's x86/IA-32 instruction mnemonics exactly with neither permission nor legal penalty.) It is doubtful whether in practice many people who programmed the V20 and V30 actually wrote in NEC's assembly language rather than Intel's; since any two assembly languages for the same instruction set architecture are isomorphic (somewhat like English and Pig Latin), there is no requirement to use a manufacturer's own published assembly language with that manufacturer's products. Language design Basic elements There is a large degree of diversity in the way the authors of assemblers categorize statements and in the nomenclature that they use. In particular, some describe anything other than a machine mnemonic or extended mnemonic as a pseudo-operation (pseudo-op). A typical assembly language consists of 3 types of instruction statements that are used to define program operations: Opcode mnemonics Data definitions Assembly directives Opcode mnemonics and extended mnemonics Instructions (statements) in assembly language are generally very simple, unlike those in high-level languages. Generally, a mnemonic is a symbolic name for a single executable machine language instruction (an opcode), and there is at least one opcode mnemonic defined for each machine language instruction. Each instruction typically consists of an operation or opcode plus zero or more operands. Most instructions refer to a single value or a pair of values. Operands can be immediate (value coded in the instruction itself), registers specified in the instruction or implied, or the addresses of data located elsewhere in storage. This is determined by the underlying processor architecture: the assembler merely reflects how this architecture works. Extended mnemonics are often used to specify a combination of an opcode with a specific operand, e.g., the System/360 assemblers use as an extended mnemonic for with a mask of 15 and ("NO OPeration" – do nothing for one step) for with a mask of 0. Extended mnemonics are often used to support specialized uses of instructions, often for purposes not obvious from the instruction name. For example, many CPU's do not have an explicit NOP instruction, but do have instructions that can be used for the purpose. In 8086 CPUs the instruction is used for , with being a pseudo-opcode to encode the instruction . Some disassemblers recognize this and will decode the instruction as . Similarly, IBM assemblers for System/360 and System/370 use the extended mnemonics and for and with zero masks. For the SPARC architecture, these are known as synthetic instructions. Some assemblers also support simple built-in macro-instructions that generate two or more machine instructions. For instance, with some Z80 assemblers the instruction is recognized to generate followed by . These are sometimes known as pseudo-opcodes. Mnemonics are arbitrary symbols; in 1985 the IEEE published Standard 694 for a uniform set of mnemonics to be used by all assemblers. The standard has since been withdrawn. Data directives There are instructions used to define data elements to hold data and variables. They define the type of data, the length and the alignment of data. These instructions can also define whether the data is available to outside programs (programs assembled separately) or only to the program in which the data section is defined. Some assemblers classify these as pseudo-ops. Assembly directives Assembly directives, also called pseudo-opcodes, pseudo-operations or pseudo-ops, are commands given to an assembler "directing it to perform operations other than assembling instructions". Directives affect how the assembler operates and "may affect the object code, the symbol table, the listing file, and the values of internal assembler parameters". Sometimes the term pseudo-opcode is reserved for directives that generate object code, such as those that generate data. The names of pseudo-ops often start with a dot to distinguish them from machine instructions. Pseudo-ops can make the assembly of the program dependent on parameters input by a programmer, so that one program can be assembled in different ways, perhaps for different applications. Or, a pseudo-op can be used to manipulate presentation of a program to make it easier to read and maintain. Another common use of pseudo-ops is to reserve storage areas for run-time data and optionally initialize their contents to known values. Symbolic assemblers let programmers associate arbitrary names (labels or symbols) with memory locations and various constants. Usually, every constant and variable is given a name so instructions can reference those locations by name, thus promoting self-documenting code. In executable code, the name of each subroutine is associated with its entry point, so any calls to a subroutine can use its name. Inside subroutines, GOTO destinations are given labels. Some assemblers support local symbols which are often lexically distinct from normal symbols (e.g., the use of "10$" as a GOTO destination). Some assemblers, such as NASM, provide flexible symbol management, letting programmers manage different namespaces, automatically calculate offsets within data structures, and assign labels that refer to literal values or the result of simple computations performed by the assembler. Labels can also be used to initialize constants and variables with relocatable addresses. Assembly languages, like most other computer languages, allow comments to be added to program source code that will be ignored during assembly. Judicious commenting is essential in assembly language programs, as the meaning and purpose of a sequence of binary machine instructions can be difficult to determine. The "raw" (uncommented) assembly language generated by compilers or disassemblers is quite difficult to read when changes must be made. Macros Many assemblers support predefined macros, and others support programmer-defined (and repeatedly re-definable) macros involving sequences of text lines in which variables and constants are embedded. The macro definition is most commonly a mixture of assembler statements, e.g., directives, symbolic machine instructions, and templates for assembler statements. This sequence of text lines may include opcodes or directives. Once a macro has been defined its name may be used in place of a mnemonic. When the assembler processes such a statement, it replaces the statement with the text lines associated with that macro, then processes them as if they existed in the source code file (including, in some assemblers, expansion of any macros existing in the replacement text). Macros in this sense date to IBM autocoders of the 1950s. Macro assemblers typically have directives to, e.g., define macros, define variables, set variables to the result of an arithmetic, logical or string expression, iterate, conditionally generate code. Some of those directives may be restricted to use within a macro definition, e.g., MEXIT in HLASM, while others may be permitted within open code (outside macro definitions), e.g., AIF and COPY in HLASM. In assembly language, the term "macro" represents a more comprehensive concept than it does in some other contexts, such as the pre-processor in the C programming language, where its #define directive typically is used to create short single line macros. Assembler macro instructions, like macros in PL/I and some other languages, can be lengthy "programs" by themselves, executed by interpretation by the assembler during assembly. Since macros can have 'short' names but expand to several or indeed many lines of code, they can be used to make assembly language programs appear to be far shorter, requiring fewer lines of source code, as with higher level languages. They can also be used to add higher levels of structure to assembly programs, optionally introduce embedded debugging code via parameters and other similar features. Macro assemblers often allow macros to take parameters. Some assemblers include quite sophisticated macro languages, incorporating such high-level language elements as optional parameters, symbolic variables, conditionals, string manipulation, and arithmetic operations, all usable during the execution of a given macro, and allowing macros to save context or exchange information. Thus a macro might generate numerous assembly language instructions or data definitions, based on the macro arguments. This could be used to generate record-style data structures or "unrolled" loops, for example, or could generate entire algorithms based on complex parameters. For instance, a "sort" macro could accept the specification of a complex sort key and generate code crafted for that specific key, not needing the run-time tests that would be required for a general procedure interpreting the specification. An organization using assembly language that has been heavily extended using such a macro suite can be considered to be working in a higher-level language since such programmers are not working with a computer's lowest-level conceptual elements. Underlining this point, macros were used to implement an early virtual machine in SNOBOL4 (1967), which was written in the SNOBOL Implementation Language (SIL), an assembly language for a virtual machine. The target machine would translate this to its native code using a macro assembler. This allowed a high degree of portability for the time. Macros were used to customize large scale software systems for specific customers in the mainframe era and were also used by customer personnel to satisfy their employers' needs by making specific versions of manufacturer operating systems. This was done, for example, by systems programmers working with IBM's Conversational Monitor System / Virtual Machine (VM/CMS) and with IBM's "real time transaction processing" add-ons, Customer Information Control System CICS, and ACP/TPF, the airline/financial system that began in the 1970s and still runs many large computer reservation systems (CRS) and credit card systems today. It is also possible to use solely the macro processing abilities of an assembler to generate code written in completely different languages, for example, to generate a version of a program in COBOL using a pure macro assembler program containing lines of COBOL code inside assembly time operators instructing the assembler to generate arbitrary code. IBM OS/360 uses macros to perform system generation. The user specifies options by coding a series of assembler macros. Assembling these macros generates a job stream to build the system, including job control language and utility control statements. This is because, as was realized in the 1960s, the concept of "macro processing" is independent of the concept of "assembly", the former being in modern terms more word processing, text processing, than generating object code. The concept of macro processing appeared, and appears, in the C programming language, which supports "preprocessor instructions" to set variables, and make conditional tests on their values. Unlike certain previous macro processors inside assemblers, the C preprocessor is not Turing-complete because it lacks the ability to either loop or "go to", the latter allowing programs to loop. Despite the power of macro processing, it fell into disuse in many high level languages (major exceptions being C, C++ and PL/I) while remaining a perennial for assemblers. Macro parameter substitution is strictly by name: at macro processing time, the value of a parameter is textually substituted for its name. The most famous class of bugs resulting was the use of a parameter that itself was an expression and not a simple name when the macro writer expected a name. In the macro: foo: macro a load a*b the intention was that the caller would provide the name of a variable, and the "global" variable or constant b would be used to multiply "a". If foo is called with the parameter a-c, the macro expansion of load a-c*b occurs. To avoid any possible ambiguity, users of macro processors can parenthesize formal parameters inside macro definitions, or callers can parenthesize the input parameters. Support for structured programming Packages of macros have been written providing structured programming elements to encode execution flow. The earliest example of this approach was in the Concept-14 macro set, originally proposed by Harlan Mills (March 1970), and implemented by Marvin Kessler at IBM's Federal Systems Division, which provided IF/ELSE/ENDIF and similar control flow blocks for OS/360 assembler programs. This was a way to reduce or eliminate the use of GOTO operations in assembly code, one of the main factors causing spaghetti code in assembly language. This approach was widely accepted in the early 1980s (the latter days of large-scale assembly language use). IBM's High Level Assembler Toolkit includes such a macro package. A curious design was A-Natural, a "stream-oriented" assembler for 8080/Z80, processors from Whitesmiths Ltd. (developers of the Unix-like Idris operating system, and what was reported to be the first commercial C compiler). The language was classified as an assembler because it worked with raw machine elements such as opcodes, registers, and memory references; but it incorporated an expression syntax to indicate execution order. Parentheses and other special symbols, along with block-oriented structured programming constructs, controlled the sequence of the generated instructions. A-natural was built as the object language of a C compiler, rather than for hand-coding, but its logical syntax won some fans. There has been little apparent demand for more sophisticated assemblers since the decline of large-scale assembly language development. In spite of that, they are still being developed and applied in cases where resource constraints or peculiarities in the target system's architecture prevent the effective use of higher-level languages. Assemblers with a strong macro engine allow structured programming via macros, such as the switch macro provided with the Masm32 package (this code is a complete program): include \masm32\include\masm32rt.inc ; use the Masm32 library .code demomain: REPEAT 20 switch rv(nrandom, 9) ; generate a number between 0 and 8 mov ecx, 7 case 0 print "case 0" case ecx ; in contrast to most other programming languages, print "case 7" ; the Masm32 switch allows "variable cases" case 1 .. 3 .if eax==1 print "case 1" .elseif eax==2 print "case 2" .else print "cases 1 to 3: other" .endif case 4, 6, 8 print "cases 4, 6 or 8" default mov ebx, 19 ; print 20 stars .Repeat print "*" dec ebx .Until Sign? ; loop until the sign flag is set endsw print chr$(13, 10) ENDM exit end demomain Use of assembly language Historical perspective Assembly languages were not available at the time when the stored-program computer was introduced. Kathleen Booth "is credited with inventing assembly language" based on theoretical work she began in 1947, while working on the ARC2 at Birkbeck, University of London following consultation by Andrew Booth (later her husband) with mathematician John von Neumann and physicist Herman Goldstine at the Institute for Advanced Study. In late 1948, the Electronic Delay Storage Automatic Calculator (EDSAC) had an assembler (named "initial orders") integrated into its bootstrap program. It used one-letter mnemonics developed by David Wheeler, who is credited by the IEEE Computer Society as the creator of the first "assembler". Reports on the EDSAC introduced the term "assembly" for the process of combining fields into an instruction word. SOAP (Symbolic Optimal Assembly Program) was an assembly language for the IBM 650 computer written by Stan Poley in 1955. Assembly languages eliminate much of the error-prone, tedious, and time-consuming first-generation programming needed with the earliest computers, freeing programmers from tedium such as remembering numeric codes and calculating addresses. They were once widely used for all sorts of programming. However, by the late 1950s, their use had largely been supplanted by higher-level languages, in the search for improved programming productivity. Today, assembly language is still used for direct hardware manipulation, access to specialized processor instructions, or to address critical performance issues. Typical uses are device drivers, low-level embedded systems, and real-time systems (see ). Numerous programs have been written entirely in assembly language. The Burroughs MCP (1961) was the first computer for which an operating system was not developed entirely in assembly language; it was written in Executive Systems Problem Oriented Language (ESPOL), an Algol dialect. Many commercial applications were written in assembly language as well, including a large amount of the IBM mainframe software written by large corporations. COBOL, FORTRAN and some PL/I eventually displaced much of this work, although a number of large organizations retained assembly-language application infrastructures well into the 1990s. Assembly language has long been the primary development language for 8-bit home computers such Atari 8-bit family, Apple II, MSX, ZX Spectrum, and Commodore 64. Interpreted BASIC dialects on these systems offer insufficient execution speed and insufficient facilities to take full advantage of the available hardware. These systems have severe resource constraints, idiosyncratic memory and display architectures, and provide limited system services. There are also few high-level language compilers suitable for microcomputer use. Similarly, assembly language is the default choice for 8-bit consoles such as the Atari 2600 and Nintendo Entertainment System. Key software for IBM PC compatibles was written in assembly language, such as MS-DOS, Turbo Pascal, and the Lotus 1-2-3 spreadsheet. As computer speed grew exponentially, assembly language became a tool for speeding up parts of programs, such as the rendering of Doom, rather than a dominant development language. In the 1990s, assembly language was used to get performance out of systems such as the Sega Saturn and as the primary language for arcade hardware based on the TMS34010 integrated CPU/GPU such as Mortal Kombat and NBA Jam. Current usage There has been debate over the usefulness and performance of assembly language relative to high-level languages. Although assembly language has specific niche uses where it is important (see below), there are other tools for optimization. , the TIOBE index of programming language popularity ranks assembly language at 11, ahead of Visual Basic, for example. Assembler can be used to optimize for speed or optimize for size. In the case of speed optimization, modern optimizing compilers are claimed to render high-level languages into code that can run as fast as hand-written assembly, despite the counter-examples that can be found. The complexity of modern processors and memory sub-systems makes effective optimization increasingly difficult for compilers, as well as for assembly programmers. Moreover, increasing processor performance has meant that most CPUs sit idle most of the time, with delays caused by predictable bottlenecks such as cache misses, I/O operations and paging. This has made raw code execution speed a non-issue for many programmers. There are some situations in which developers might choose to use assembly language: Writing code for systems with that have limited high-level language options such as the Atari 2600, Commodore 64, and graphing calculators. Programs for these computers of the 1970s and 1980s are often written in the context of demoscene or retrogaming subcultures. Code that must interact directly with the hardware, for example in device drivers and interrupt handlers. In an embedded processor or DSP, high-repetition interrupts require the shortest number of cycles per interrupt, such as an interrupt that occurs 1000 or 10000 times a second. Programs that need to use processor-specific instructions not implemented in a compiler. A common example is the bitwise rotation instruction at the core of many encryption algorithms, as well as querying the parity of a byte or the 4-bit carry of an addition. A stand-alone executable of compact size is required that must execute without recourse to the run-time components or libraries associated with a high-level language. Examples have included firmware for telephones, automobile fuel and ignition systems, air-conditioning control systems, security systems, and sensors. Programs with performance-sensitive inner loops, where assembly language provides optimization opportunities that are difficult to achieve in a high-level language. For example, linear algebra with BLAS or discrete cosine transformation (e.g. SIMD assembly version from x264). Programs that create vectorized functions for programs in higher-level languages such as C. In the higher-level language this is sometimes aided by compiler intrinsic functions which map directly to SIMD mnemonics, but nevertheless result in a one-to-one assembly conversion specific for the given vector processor. Real-time programs such as simulations, flight navigation systems, and medical equipment. For example, in a fly-by-wire system, telemetry must be interpreted and acted upon within strict time constraints. Such systems must eliminate sources of unpredictable delays, which may be created by (some) interpreted languages, automatic garbage collection, paging operations, or preemptive multitasking. However, some higher-level languages incorporate run-time components and operating system interfaces that can introduce such delays. Choosing assembly or lower-level languages for such systems gives programmers greater visibility and control over processing details. Cryptographic algorithms that must always take strictly the same time to execute, preventing timing attacks. Video encoders and decoders such as rav1e (an encoder for AV1) and dav1d (the reference decoder for AV1) contain assembly to leverage AVX2 and ARM Neon instructions when available. Modify and extend legacy code written for IBM mainframe computers. Situations where complete control over the environment is required, in extremely high-security situations where nothing can be taken for granted. Computer viruses, bootloaders, certain device drivers, or other items very close to the hardware or low-level operating system. Instruction set simulators for monitoring, tracing and debugging where additional overhead is kept to a minimum. Situations where no high-level language exists, on a new or specialized processor for which no cross compiler is available. Reverse engineering and modifying program files such as: existing binaries that may or may not have originally been written in a high-level language, for example when trying to recreate programs for which source code is not available or has been lost, or cracking copy protection of proprietary software. Video games (also termed ROM hacking), which is possible via several methods. The most widely employed method is altering program code at the assembly language level. Assembly language is still taught in most computer science and electronic engineering programs. Although few programmers today regularly work with assembly language as a tool, the underlying concepts remain important. Such fundamental topics as binary arithmetic, memory allocation, stack processing, character set encoding, interrupt processing, and compiler design would be hard to study in detail without a grasp of how a computer operates at the hardware level. Since a computer's behavior is fundamentally defined by its instruction set, the logical way to learn such concepts is to study an assembly language. Most modern computers have similar instruction sets. Therefore, studying a single assembly language is sufficient to learn: I) the basic concepts; II) to recognize situations where the use of assembly language might be appropriate; and III) to see how efficient executable code can be created from high-level languages. Typical applications Assembly language is typically used in a system's boot code, the low-level code that initializes and tests the system hardware prior to booting the operating system and is often stored in ROM. (BIOS on IBM-compatible PC systems and CP/M is an example.) Assembly language is often used for low-level code, for instance for operating system kernels, which cannot rely on the availability of pre-existing system calls and must indeed implement them for the particular processor architecture on which the system will be running. Some compilers translate high-level languages into assembly first before fully compiling, allowing the assembly code to be viewed for debugging and optimization purposes. Some compilers for relatively low-level languages, such as Pascal or C, allow the programmer to embed assembly language directly in the source code (so called inline assembly). Programs using such facilities can then construct abstractions using different assembly language on each hardware platform. The system's portable code can then use these processor-specific components through a uniform interface. Assembly language is useful in reverse engineering. Many programs are distributed only in machine code form which is straightforward to translate into assembly language by a disassembler, but more difficult to translate into a higher-level language through a decompiler. Tools such as the Interactive Disassembler make extensive use of disassembly for such a purpose. This technique is used by hackers to crack commercial software, and competitors to produce software with similar results from competing companies. Assembly language is used to enhance speed of execution, especially in early personal computers with limited processing power and RAM. Assemblers can be used to generate blocks of data, with no high-level language overhead, from formatted and commented source code, to be used by other code. See also Compiler Comparison of assemblers Disassembler Hexadecimal Instruction set architecture Little man computer – an educational computer model with a base-10 assembly language Nibble Typed assembly language Notes References Further reading (2+xiv+270+6 pages) ("An online book full of helpful ASM info, tutorials and code examples" by the ASM Community, archived at the internet archive.) External links Unix Assembly Language Programming Linux Assembly PPR: Learning Assembly Language NASM – The Netwide Assembler BSD-licensed x86 assembler Assembly Language Programming Examples Authoring Windows Applications In Assembly Language Assembly Optimization Tips by Mark Larson Assembly language Computer-related introductions in 1949 Embedded systems Low-level programming languages Programming language implementation Programming languages created in 1949

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https://en.wikipedia.org/wiki/Ambrose

Ambrose

Ambrose of Milan (; 4 April 397), venerated as Saint Ambrose, was a theologian and statesman who served as Bishop of Milan from 374 to 397. He expressed himself prominently as a public figure, fiercely promoting Roman Christianity against Arianism and paganism. He left a substantial collection of writings, of which the best known include the ethical commentary De officiis ministrorum (377–391), and the exegetical (386–390). His preachings, his actions and his literary works, in addition to his innovative musical hymnography, made him one of the most influential ecclesiastical figures of the 4th century. Ambrose was serving as the Roman governor of Aemilia-Liguria in Milan when he was unexpectedly made Bishop of Milan in 374 by popular acclamation. As bishop, he took a firm position against Arianism and attempted to mediate the conflict between the emperors Theodosius I and Magnus Maximus. Tradition credits Ambrose with developing an antiphonal chant, known as Ambrosian chant, and for composing the "Te Deum" hymn, though modern scholars now reject both of these attributions. Ambrose's authorship on at least four hymns, including the well-known "Veni redemptor gentium", is secure; they form the core of the Ambrosian hymns, which includes others that are sometimes attributed to him. He also had notable influence on Augustine of Hippo (354–430), whom he helped convert to Christianity. Western Christianity identified Ambrose as one of its four traditional Doctors of the Church. He is considered a saint by the Catholic Church, Eastern Orthodox Church, Anglican Communion, and various Lutheran denominations, and venerated as the patron saint of Milan and beekeepers. Background and career Legends about Ambrose had spread through the empire long before his biography was written, making it difficult for modern historians to understand his true character and fairly place his behavior within the context of antiquity. Most agree he was the personification of his era. This would make Ambrose a genuinely spiritual man who spoke up and defended his faith against opponents, an aristocrat who retained many of the attitudes and practices of a Roman governor, and also an ascetic who served the poor. Early life Ambrose was born into a Roman Christian family in the year 339. Ambrose himself wrote that he was 53 years old in his letter number 49, which has been dated to 392. He began life in Augusta Trevorum (modern Trier) the capital of the Roman province of Gallia Belgica in what was then northeastern Gaul and is now in the Rhineland-Palatinate in Germany. Scholars disagree on who exactly his father was. His father is sometimes identified with Aurelius Ambrosius, a praetorian prefect of Gaul; but some scholars identify his father as an official named Uranius who received an imperial constitution dated 3 February 339 (addressed in a brief extract from one of the three emperors ruling in 339, Constantine II, Constantius II, or Constans, in the Codex Theodosianus, book XI.5). What does seem certain is that Ambrose was born in Trier and his father was either the praetorian prefect or part of his administration. A legend about Ambrose as an infant recounts that a swarm of bees settled on his face while he lay in his cradle, leaving behind a drop of honey. His father is said to have considered this a sign of his future eloquence and honeyed tongue. Bees and beehives often appear in the saint's symbology. Ambrose' mother was a woman of intellect and piety. It was probable that she was a member of the Roman family Aurelii Symmachi, which would make Ambrose a cousin of the orator Quintus Aurelius Symmachus. The family had produced one martyr (the virgin Soteris) in its history. Ambrose was the youngest of three children. His siblings were Satyrus, the subject of Ambrose's De excessu fratris Satyri, and Marcellina, who made a profession of virginity sometime between 352 and 355; Pope Liberius himself conferred the veil upon her. Both Ambrose's siblings also became venerated as saints. Some time early in the life of Ambrose, his father died. At an unknown later date, his mother fled Trier with her three children, and the family moved to Rome. There Ambrose studied literature, law, and rhetoric. He then followed in his father's footsteps and entered public service. Praetorian Prefect Sextus Claudius Petronius Probus first gave him a place as a judicial councillor, and then in about 372 made him governor of the province of Liguria and Emilia, with headquarters at Milan. Bishop of Milan In 374 the bishop of Milan, Auxentius, an Arian, died, and the Arians challenged the succession. Ambrose went to the church where the election was to take place to prevent an uproar which seemed probable in this crisis. His address was interrupted by a call, "Ambrose, bishop!", which was taken up by the whole assembly. Ambrose, though known to be Nicene Christian in belief, was considered acceptable to Arians due to the charity he had shown concerning their beliefs. At first he energetically refused the office of bishop, for which he felt he was in no way prepared: Ambrose was a relatively new Christian who was not yet baptized nor formally trained in theology. Ambrose fled to a colleague's home, seeking to hide. Upon receiving a letter from the Emperor Gratian praising the appropriateness of Rome appointing individuals worthy of holy positions, Ambrose's host gave him up. Within a week, he was baptized, ordained and duly consecrated as the new bishop of Milan. This was the first time in the West that a member of the upper class of high officials had accepted the office of bishop. As bishop, he immediately adopted an ascetic lifestyle, apportioned his money to the poor, donating all of his land, making only provision for his sister Marcellina. This raised his standing even further; it was his popularity with the people that gave him considerable political leverage throughout his career. Upon the unexpected appointment of Ambrose to the episcopate, his brother Satyrus resigned a prefecture in order to move to Milan, where he took over managing the diocese's temporal affairs. Arianism Arius (died 336) was a Christian priest who asserted (around the year 300) that God the Father must have created the Son, making the Son a lesser being who was not eternal and of a different "essence" than God the Father. This Christology, though contrary to tradition, quickly spread through Egypt and Libya and other Roman provinces. Bishops engaged in "wordy warfare", and the people divided into parties, sometimes demonstrating in the streets in support of one side or the other. Arianism appealed to many high-level leaders and clergy in both the Western and Eastern empires. Although the western Emperor Gratian () supported orthodoxy, his younger half brother Valentinian II, who became his colleague in the empire in 375, adhered to the Arian creed. Ambrose sought to refute Arian propositions theologically, but Ambrose did not sway the young prince's position. In the East, Emperor Theodosius I () likewise professed the Nicene creed; but there were many adherents of Arianism throughout his dominions, especially among the higher clergy. In this state of religious ferment, two leaders of the Arians, bishops Palladius of Ratiaria and Secundianus of Singidunum, confident of numbers, prevailed upon Gratian to call a general council from all parts of the empire. This request appeared so equitable that Gratian complied without hesitation. However, Ambrose feared the consequences and prevailed upon the emperor to have the matter determined by a council of the Western bishops. Accordingly, a synod composed of thirty-two bishops was held at Aquileia in the year 381. Ambrose was elected president and Palladius, being called upon to defend his opinions, declined. A vote was then taken and Palladius and his associate Secundianus were deposed from their episcopal offices. Ambrose struggled with Arianism for over half of his term in the episcopate. Ecclesiastical unity was important to the church, but it was no less important to the state, and as a Roman, Ambrose felt strongly about that. Judaism was more attractive for those seeking conversion than previous scholars have realized, and pagans were still in the majority. Conflict over heresies loomed large in an age of religious ferment comparable to the Reformation of the fourteenth and fifteenth centuries. Orthodox Christianity was determining how to define itself as it faced multiple challenges on both a theological and a practical level, and Ambrose exercised crucial influence at a crucial time. Imperial relations Ambrose had good relations and varying levels of influence with the Roman emperors Gratian, Valentinian II and Theodosius I, but exactly how much influence, what kind of influence, and in what ways, when, has been debated in the scholarship of the late twentieth and early twenty-first centuries. Gratian It has long been convention to see Gratian and Ambrose as having a personal friendship, putting Ambrose in the dominant role of spiritual guide, but modern scholars now find this view hard to support from the sources. The ancient Christian historian Sozomen () is the only ancient source that shows Ambrose and Gratian together in any personal interaction. In that interaction, Sozomen relates that, in the last year of Gratian's reign, Ambrose crashed Gratian's private hunting-party in order to appeal on behalf of a pagan senator sentenced to die. After years of acquaintance, this indicates that Ambrose could not take for granted that Gratian would see him, so instead, Ambrose had to resort to such maneuverings to make his appeal. Gratian was personally devout long before meeting Ambrose. Modern scholarship indicates Gratian's religious policies do not evidence capitulation to Ambrose more than they evidence Gratian's own views. Gratian's devotion did lead Ambrose to write a large number of books and letters of theology and spiritual commentary dedicated to the emperor. The sheer volume of these writings and the effusive praise they contain has led many historians to conclude that Gratian was dominated by Ambrose, and it was that dominance that produced Gratian's anti-pagan actions. McLynn asserts that effusive praises were common in everyone's correspondence with the crown. He adds that Gratian's actions were determined by the constraints of the system as much as "by his own initiatives or Ambrose's influence". McLynn asserts that the largest influence on Gratian's policy was the profound change in political circumstances produced by the Battle of Adrianople in 378. Gratian had become involved in fighting the Goths the previous year and had been on his way to the Balkans when his uncle and the "cream of the eastern army" were destroyed at Adrianople. Gratian withdrew to Sirmium and set up his court there. Several rival groups, including the Arians, sought to secure benefits from the government at Sirmium. In an Arian attempt to undermine Ambrose, whom Gratian had not yet met, Gratian was "warned" that Ambrose' faith was suspect. Gratian took steps to investigate by writing to Ambrose and asking him to explain his faith. Ambrose and Gratian first met, after this, in 379 during a visit to Milan. The bishop made a good impression on Gratian and his court, which was pervasively Christian and aristocratic – much like Ambrose himself. The emperor returned to Milan in 380 to find that Ambrose had complied with his request for a statement of his faith – in two volumes – known as De Fide: a statement of orthodoxy and of Ambrose' political theology, as well as a polemic against the Arian heresy – intended for public discussion. The emperor had not asked to be instructed by Ambrose, and in De Fide Ambrose states this clearly. Nor was he asked to refute the Arians. He was asked to justify his own position, but in the end, he did all three. It seems that by 382 Ambrose had replaced Ausonius to become a major influence in Gratian's court. Ambrose had not yet become the "conscience" of kings he would in the later 380s, but he did speak out against reinstating the Altar of Victory. In 382, Gratian was the first to divert public financial subsidies that had previously supported Rome's cults. Before that year, contributions in support of the ancient customs had continued unchallenged by the state. Valentinian II The childless Gratian had treated his younger brother Valentinian II like a son. Ambrose, on the other hand, had incurred the lasting enmity of Valentinian II's mother, the Empress Justina, in the winter of 379 by helping to appoint a Nicene bishop in Sirmium. Not long after this, Valentinian II, his mother, and the court left Sirmium; Sirmium had come under Theodosius' control, so they went to Milan which was ruled by Gratian. In 383 Gratian was assassinated at Lyon, in Gaul (France) by Magnus Maximus. Valentinian was twelve years old, and the assassination left his mother, Justina, in a position of something akin to a regent. In 385 (or 386) the emperor Valentinian II and his mother Justina, along with a considerable number of clergy, the laity, and the military, professed Arianism. Conflict between Ambrose and Justina soon followed. The Arians demanded that Valentinian allocate to them two churches in Milan: one in the city (the Basilica of the Apostles), the other in the suburbs (St Victor's). Ambrose refused to surrender the churches. He answered by saying that "What belongs to God, is outside the emperor's power." In this, Ambrose called on an ancient Roman principle: a temple set apart to a god became the property of that god. Ambrose now applied this ancient legal principle to the Christian churches, seeing the bishop, as a divine representative, as guardian of his god's property. Subsequently, while Ambrose was performing the Liturgy of the Hours in the basilica, the prefect of the city came to persuade him to give it up to the Arians. Ambrose again refused. Certain deans (officers of the court) were sent to take possession of the basilica by hanging upon it imperial escutcheons. Instead, soldiers from the ranks the emperor had placed around the basilica began pouring into the church, assuring Ambrose of their fidelity. The escutcheons outside the church were removed, and legend says the children tore them to shreds. Ambrose refused to surrender the basilica, and sent sharp answers back to his emperor: "If you demand my person, I am ready to submit: carry me to prison or to death, I will not resist; but I will never betray the church of Christ. I will not call upon the people to succour me; I will die at the foot of the altar rather than desert it. The tumult of the people I will not encourage: but God alone can appease it." By Thursday, the emperor gave in, bitterly responding: "Soon, if Ambrose gives the orders, you will be sending me to him in chains." In 386, Justina and Valentinian II received the Arian bishop Auxentius the younger, and Ambrose was again ordered to hand over a church in Milan for Arian usage. Ambrose and his congregation barricaded themselves inside the church, and again the imperial order was rescinded. There was an attempted kidnapping, and another attempt to arrest him and to force him to leave the city. Several accusations were made, but unlike in the case of John Chrysostom, no formal charges were brought. The emperor certainly had the power to do so, and probably did not solely because of Ambrose' popularity with the people and what they might do. When Magnus Maximus usurped power in Gaul (383) and was considering a descent upon Italy, Valentinian sent Ambrose to dissuade him, and the embassy was successful (384). A second, later embassy was unsuccessful. Magnus Maximus entered Italy (386-387) and Milan was taken. Justina and her son fled, but Ambrose remained, and had the plate of the church melted for the relief of the poor. Theodosius While Ambrose was writing De Fide, Theodosius published his own statement of faith in 381 in an edict establishing Nicene Catholic Christianity as the only legitimate version of the Christian faith. There is unanimity amongst scholars that this represents the emperor's own beliefs. The aftermath of the death (378) of Valens (Emperor in the East from 364 to 378) had left many questions for the church unresolved, and Theodosius' edict can be seen as an effort to begin addressing those questions. Theodosius' natural generosity was tempered by his pressing need to establish himself and to publicly assert his personal piety. On 28 February 380, Theodosius issued the Edict of Thessalonica, a decree addressed to the city of Constantinople, determining that only Christians who did not support Arian views were catholic and could have their places of worship officially recognized as "churches". The Edict opposed Arianism, and attempted to establish unity in Christianity and to suppress heresy. German ancient historian writes that the Edict of Thessalonica was neither anti-pagan nor antisemitic; it did not declare Christianity to be the official religion of the empire; and it gave no advantage to Christians over other faiths. Liebeschuetz and Hill indicate that it was not until after 388, during Theodosius' stay in Milan following the defeat of Maximus in 388, that Theodosius and Ambrose first met. After the Massacre of Thessalonica in 390, Theodosius made an act of public penance at Ambrose's behest. Ambrose was away from court during the events at Thessalonica, but after being informed of them, he wrote Theodosius a letter. In that still existing letter, Ambrose presses for a semi-public demonstration of penitence from the emperor, telling him that, as his bishop, he will not give Theodosius communion until it is done. Wolf Liebeschuetz says "Theodosius duly complied and came to church without his imperial robes, until Christmas, when Ambrose openly admitted him to communion". Formerly, some scholars credited Ambrose with having an undue influence over the Emperor Theodosius I, from this period forward, prompting him toward major anti-pagan legislation beginning in February of 391. However, this interpretation has been heavily disputed since the late-twentieth century. McLynn argues that Theodosius's anti-pagan legislation was too limited in scope for it to be of interest to the bishop. The fabled encounter at the door of the cathedral in Milan, with Ambrose as the mitred prelate braced, blocking Theodosius from entering, which has sometimes been seen as evidence of Ambrose' dominance over Theodosius, has been debunked by modern historians as "a pious fiction". There was no encounter at the church door. The story is a product of the imagination of Theodoret, a historian of the fifth century who wrote of the events of 390 "using his own ideology to fill the gaps in the historical record". The twenty-first century view is that Ambrose was "not a power behind the throne". The two men did not meet each other frequently, and documents that reveal the relationship between the two are less about personal friendship than they are about negotiations between two formidable leaders of the powerful institutions they represent: the Roman State and the Italian Church. Cameron says there is no evidence that Ambrose was a significant influence on the emperor. For centuries after his death, Theodosius was regarded as a champion of Christian orthodoxy who decisively stamped out paganism. This view was recorded by Theodoret, who is recognized as an unreliable historian, in the century following their deaths. Theodosius's predecessors Constantine (), Constantius (), and Valens had all been semi-Arians. Therefore, it fell to the orthodox Theodosius to receive from Christian literary tradition most of the credit for the final triumph of Christianity. Modern scholars see this as an interpretation of history by orthodox Christian writers more than as a representation of actual history. The view of a pious Theodosius submitting meekly to the authority of the church, represented by Ambrose, is part of the myth that evolved within a generation of their deaths. Later years and death In April 393 Arbogast (magister militum of the West) and his puppet Emperor Eugenius marched into Italy to consolidate their position in regard to Theodosius I and his son, Honorius, whom Theodosius had appointed Augustus to govern the western portion of the empire. Arbogast and Eugenius courted Ambrose's support by very obliging letters; but before they arrived at Milan, he had retired to Bologna, where he assisted at the translation of the relics of Saints Vitalis and Agricola. From there he went to Florence, where he remained until Eugenius withdrew from Milan to meet Theodosius in the Battle of the Frigidus in early September 394. Soon after acquiring the undisputed possession of the Roman Empire, Theodosius died at Milan in 395, and Ambrose gave the eulogy. Two years later (4 April 397) Ambrose also died. He was succeeded as bishop of Milan by Simplician. Ambrose's body may still be viewed in the church of Saint Ambrogio in Milan, where it has been continuously venerated – along with the bodies identified in his time as being those of Saints Gervase and Protase. Ambrose is remembered in the calendar of the Roman Rite of the Catholic Church on 7 December, and is also honored in the Church of England and in the Episcopal Church on 7 December. Character In 1960, Neil B. McLynn wrote a complex study of Ambrose that focused on his politics and intended to "demonstrate that Ambrose viewed community as a means to acquire personal political power". Subsequent studies of how Ambrose handled his episcopal responsibilities, his Nicene theology and his dealings with the Arians in his episcopate, his pastoral care, his commitment to community, and his personal asceticism, have mitigated this view. All of Ambrose' writings are works of advocacy of his religion, and even his political views and actions were closely related to his religion. He was rarely, if ever, concerned about simply recording what had happened; he did not write to reveal his inner thoughts and struggles; he wrote to advocate for his God. Boniface Ramsey writes that it is difficult "not to posit a deep spirituality in a man" who wrote on the mystical meanings of the Song of Songs and wrote many extraordinary hymns. In spite of an abiding spirituality, Ambrose had a generally straightforward manner, and a practical rather than a speculative tendency in his thinking. De Officiis is a utilitarian guide for his clergy in their daily ministry in the Milanese church rather than "an intellectual tour de force". Christian faith in the third century developed the monastic life-style which subsequently spread into the rest of Roman society in a general practice of virginity, voluntary poverty and self-denial for religious reasons. This life-style was embraced by many new converts, including Ambrose, even though they did not become actual monks. The bishops of this era had heavy administrative responsibilities, and Ambrose was also sometimes occupied with imperial affairs, but he still fulfilled his primary responsibility to care for the well-being of his flock. He preached and celebrated the Eucharist multiple times a week, sometimes daily, dealt directly with the needs of the poor, as well as widows and orphans, "virgins" (nuns), and his own clergy. He replied to letters personally, practiced hospitality, and made himself available to the people. Ambrose had the ability to maintain good relationships with all kinds of people. Local church practices varied quite a bit from place to place at this time, and as the bishop, Ambrose could have required that everyone adapt to his way of doing things. It was his place to keep the churches as united as possible in both ritual and belief. Instead, he respected local customs, adapting himself to whatever practices prevailed, instructing his mother to do the same. As bishop, Ambrose undertook many different labors in an effort to unite people and "provide some stability during a period of religious, political, military, and social upheavals and transformations". Brown says Ambrose "had the makings of a faction fighter". While he got along well with most people, Ambrose was not averse to conflict and even opposed emperors with a fearlessness born of self-confidence and a clear conscience and not from any belief he would not suffer for his decisions. Having begun his life as a Roman aristocrat and a governor, it is clear that Ambrose retained the attitude and practice of Roman governance even after becoming a bishop. His acts and writings show he was quite clear about the limits of imperial power over the church's internal affairs including doctrine, moral teaching, and governance. He wrote to Valentinian: "In matters of faith bishops are the judges of Christian emperors, not emperors of bishops." (Epistle 21.4). He also famously told to the Arian bishop chosen by the emperor, "The emperor is in the church, not over the church." (Sermon Against Auxentius, 36). Ambrose's acts and writings "created a sort of model which was to remain valid in the Latin West for the relations of the Church and the Christian State. Both powers stood in a basically positive relationship to each other, but the innermost sphere of the Church's life--faith, the moral order, ecclesiastical discipline--remained withdrawn from the State's influence." Ambrose was also well aware of the limits of his power. At the height of his career as a venerable, respected and well loved bishop in 396, imperial agents marched into his church, pushing past him and his clergy who had crowded the altar to protect a political suspect from arrest, and dragged the man from the church in front of Ambrose who could do nothing to stop it. "When it came to the central functions of the Roman state, even the vivid Ambrose was a lightweight". Attitude towards Jews The most notorious example of Ambrose's anti-Jewish animus occurred in 388, when Emperor Theodosius I was informed that a crowd of Christians had retaliated against the local Jewish community by destroying the synagogue at Callinicum on the Euphrates. The synagogue most likely existed within the fortified town to service the soldiers serving there, and Theodosius ordered that the offenders be punished, and that the synagogue be rebuilt at the expense of the bishop. Ambrose wrote to the emperor arguing against this, basing his argument on two assertions: first, if the bishop obeyed the order, it would be a betrayal of his faith. Second, if the bishop instead refused to obey the order, he would become a martyr and create a scandal for the emperor. Ambrose, referring to a prior incident where Magnus Maximus issued an edict censuring Christians in Rome for burning down a Jewish synagogue, warned Theodosius that the people in turn exclaimed "the emperor has become a Jew", implying Theodosius would receive the same lack of support from the people. Theodosius rescinded the order concerning the bishop. That was not enough for Ambrose, and when Theodosius next visited Milan, Ambrose confronted him directly in an effort to get the emperor to drop the entire case. McLynn argues that Ambrose failed to win the emperor's sympathy and was mostly excluded from his counsels thereafter. The Callinicum affair was not an isolated incident. Generally speaking, Ambrose presents a strong anti-Jewish polemic. While McLynn says this makes Ambrose look like a bully and a bigot to modern eyes, scholars also agree Ambrose' attitudes toward the Jews cannot be fairly summarized in one sentence, as not all of Ambrose' attitudes toward Jews were negative. Ambrose makes extensive and appreciative use of the works of Philo of Alexandria – a Jew – in Ambrose' own writings, treating Philo as one of the "faithful interpreters of the Scriptures". Philo was an educated man of some standing and a prolific writer during the era of Second Temple Judaism. Forty–three of his treatises have been preserved, and these by Christians, rather than Jews. Philo became foundational in forming the Christian literary view on the six days of creation through Basil's Hexaemeron. Eusebius, the Cappadocian Fathers, and Didymus the Blind appropriated material from Philo as well, but none did so more than Ambrose. As a result of this extensive referencing, Philo was accepted into the Christian tradition as an honorary Church Father. "In fact, one Byzantine catena even refers to him as 'Bishop Philo'. This high regard for Philo even led to a number of legends of his conversion to Christianity, although this assertion stands on very dubious evidence". Ambrose also used Josephus, Maccabees, and other Jewish sources for his writings. He praises some individual Jews. Ambrose tended to write negatively of all non-Nicenes as if they were all one category. This served a rhetorical purpose in his writing and should be considered accordingly. Attitude towards pagans Modern scholarship indicates paganism was a lesser concern than heresy for Christians in the fourth and fifth centuries, which was the case for Ambrose, but it was still a concern. Writings of this period were commonly hostile and often contemptuous toward a paganism Christianity saw as already defeated in Heaven. The great Christian writers of the third to fifth centuries attempted to discredit continuation in these "defeated practices" by searching pagan writings, "particularly those of Varro, for everything that could be regarded by Christian standards as repulsive and irreligious." Ambrose' work reflects this triumphalism.{{efn|These Christian sources have had great influence on perceptions of this period by creating an impression of overt and continuous conflict that has been assumed on an empire-wide scale, while archaeological evidence indicates that, outside of violent rhetoric, the decline of paganism away from the imperial court was relatively non-confrontational.{{sfnm|Trombley|2001|1loc=Vol I|1pp=166-168|Trombley|2001|2loc=Vol II|2pp=335-336}}}} Throughout his time in the episcopate, Ambrose was active in his opposition to any state sponsorship of pagan cults. When Gratian ordered the Altar of Victory to be removed, it roused the aristocracy of Rome to send a delegation to the emperor to appeal the decision, but Pope Damasus I got the Christian senators to petition against it, and Ambrose blocked the delegates from getting an audience with the emperor. Under Valentinian II, an effort was made to restore the Altar of Victory to its ancient station in the hall of the Roman Senate and to again provide support for the seven Vestal Virgins. The pagan party was led by the refined senator Quintus Aurelius Symmachus, who used all his prodigious skill and artistry to create a marvelous document full of the maiestas populi Romani. Hans Lietzmann writes that "Pagans and Christians alike were stirred by the solemn earnestness of an admonition which called all men of goodwill to the aid of a glorious history, to render all worthy honor to a world that was fading away". Then Ambrose wrote Valentinian II a letter asserting that the emperor was a soldier of God, not simply a personal believer but one bound by his position to serve the faith; under no circumstances could he agree to something that would promote the worship of idols. Ambrose held up the example of Valentinian's brother, Gratian, reminding Valentinian that the commandment of God must take precedence. The bishop's intervention led to the failure of Symmachus' appeal. In 389, Ambrose intervened against a pagan senatorial delegation who wished to see the emperor Theodosius I. Although Theodosius refused their requests, he was irritated at the bishop's presumption and refused to see him for several days. Later, Ambrose wrote a letter to the emperor Eugenius complaining that some gifts the latter had bestowed on pagan senators could be used for funding pagan cults. Theology Ambrose joins Augustine, Jerome, and Gregory the Great as one of the Latin Doctors of the Church. Theologians compare him with Hilary, who they claim fell short of Ambrose's administrative excellence but demonstrated greater theological ability. He succeeded as a theologian despite his juridical training and his comparatively late handling of biblical and doctrinal subjects. Ambrose's intense episcopal consciousness furthered the growing doctrine of the Church and its sacerdotal ministry, while the prevalent asceticism of the day, continuing the Stoic and Ciceronian training of his youth, enabled him to promulgate a lofty standard of Christian ethics. Thus we have the De officiis ministrorum, De viduis, De virginitate and De paenitentia. Ambrose displayed a kind of liturgical flexibility that kept in mind that liturgy was a tool to serve people in worshiping God, and ought not to become a rigid entity that is invariable from place to place. His advice to Augustine of Hippo on this point was to follow local liturgical custom. "When I am at Rome, I fast on a Saturday; when I am at Milan, I do not. Follow the custom of the church where you are." Thus Ambrose refused to be drawn into a false conflict over which particular local church had the "right" liturgical form where there was no substantial problem. His advice has remained in the English language as the saying, "When in Rome, do as the Romans do." One interpretation of Ambrose's writings is that he was a Christian universalist. It has been noted that Ambrose's theology was significantly influenced by that of Origen and Didymus the Blind, two other early Christian universalists. One quotation cited in favor of this belief is: One could interpret this passage as being another example of the mainstream Christian belief in a general resurrection (that both those in Heaven and in Hell undergo a bodily resurrection), or an allusion to purgatory (that some destined for Heaven must first undergo a phase of purification). Several other works by Ambrose clearly teach the mainstream view of salvation. For example: "The Jews feared to believe in manhood taken up into God, and therefore have lost the grace of redemption, because they reject that on which salvation depends." Giving to the poor In De Officiis, the most influential of his surviving works, and one of the most important texts of patristic literature, he reveals his views connecting justice and generosity by asserting these practices are of mutual benefit to the participants. Ambrose draws heavily on Cicero and the biblical book of Genesis for this concept of mutual inter-dependence in society. In the bishop's view, it is concern for one another's interests that binds society together. Ambrose asserts that avarice leads to a breakdown in this mutuality, therefore avarice leads to a breakdown in society itself. In the late 380s, the bishop took the lead in opposing the greed of the elite landowners in Milan by starting a series of pointed sermons directed at his wealthy constituents on the need for the rich to care for the poor. Some scholars have suggested Ambrose' endeavors to lead his people as both a Roman and a Christian caused him to strive for what a modern context would describe as a type of communism or socialism. He was not just interested in the church but was also interested in the condition of contemporary Italian society. Ambrose considered the poor not a distinct group of outsiders, but a part of a united people to be stood with in solidarity. Giving to the poor was not to be considered an act of generosity towards the fringes of society but a repayment of resources that God had originally bestowed on everyone equally and that the rich had usurped. He defines justice as providing for the poor whom he describes as our "brothers and sisters" because they "share our common humanity". Mariology The theological treatises of Ambrose of Milan would come to influence Popes Damasus, Siricius and Leo XIII. Central to Ambrose is the virginity of Mary and her role as Mother of God. The virgin birth is worthy of God. Which human birth would have been more worthy of God, than the one in which the Immaculate Son of God maintained the purity of his immaculate origin while becoming human? We confess that Christ the Lord was born from a virgin, and therefore we reject the natural order of things. Because she conceived not from a man but from the Holy Spirit. Christ is not divided but one. If we adore him as the Son of God, we do not deny his birth from the virgin. ... But nobody shall extend this to Mary. Mary was the temple of God but not God in the temple. Therefore, only the one who was in the temple can be worshiped. Yes, truly blessed for having surpassed the priest (Zechariah). While the priest denied, the Virgin rectified the error. No wonder that the Lord, wishing to rescue the world, began his work with Mary. Thus she, through whom salvation was being prepared for all people, would be the first to receive the promised fruit of salvation. Ambrose viewed celibacy as superior to marriage and saw Mary as the model of virginity. Augustine Ambrose studied theology with Simplician, a presbyter of Rome. Using his excellent knowledge of Greek, which was then rare in the West, Ambrose studied the Old Testament and Greek authors like Philo, Origen, Athanasius, and Basil of Caesarea, with whom he was also exchanging letters. Ambrose became a famous rhetorician whom Augustine came to hear speak. Augustine wrote in his Confessions that Faustus, the Manichean rhetorician, was a more impressive speaker, but the content of Ambrose's sermons began to affect Augustine's faith. Augustine sought guidance from Ambrose, and again records in his Confessions that Ambrose was too busy to answer his questions. In a passage of Augustine's Confessions in which Augustine wonders why he could not share his burden with Ambrose, he comments: "Ambrose himself I esteemed a happy man, as the world counted happiness, because great personages held him in honor. Only his celibacy appeared to me a painful burden." Simplician regularly met with Augustine, however, and Augustine writes of Simplician's "fatherly affection" for him. It was Simplician who introduced Augustine to Christian Neoplatonism. It is commonly understood in the Christian Tradition that Ambrose baptized Augustine. In this same passage of Augustine's Confessions is an anecdote which bears on the history of reading: This is a celebrated passage in modern scholarly discussion. The practice of reading to oneself without vocalizing the text was less common in antiquity than it has since become. In a culture that set a high value on oratory and public performances of all kinds, in which the production of books was very labor-intensive, the majority of the population was illiterate, and where those with the leisure to enjoy literary works also had slaves to read for them, written texts were more likely to be seen as scripts for recitation than as vehicles of silent reflection. However, there is also evidence that silent reading did occur in antiquity and that it was not generally regarded as unusual. Music Ambrose's writings extend past literature and into music, where he was an important innovator in early Christian hymnography. His contributions include the "successful invention of Christian Latin hymnody", while the hymnologist Guido Maria Dreves designated him to be "The Father of church hymnody". He was not the first to write Latin hymns; the Bishop Hilary of Poitiers had done so a few decades before. However, the hymns of Hilary are thought to have been largely inaccessible because of their complexity and length. Only fragments of hymns from Hilary's Liber hymnorum exist, making those of Ambrose the earliest extant complete Latin hymns. The assembling of Ambrose's surviving oeuvre remains controversial; the almost immediate popularity of his style quickly prompted imitations, some which may even date from his lifetime. There are four hymns for which Ambrose's authorship is universally accepted, as they are attributed to him by Augustine: "Aeterne rerum conditor" "Deus creator omnium" "Iam surgit hora tertia" "Veni redemptor gentium" (also known as "Intende qui regis Israel") Each of these hymns has eight four-line stanzas and is written in strict iambic tetrameter (that is 4 × 2 syllables, each iamb being two syllables). Marked by dignified simplicity, they served as a fruitful model for later times. Scholars such as the theologian Brian P. Dunkle have argued for the authenticity of as many as thirteen other hymns, while the musicologist James McKinnon contends that further attributions could include "perhaps some ten others". Ambrose is traditionally credited but not actually known to have composed any of the repertory of Ambrosian chant also known simply as "antiphonal chant", a method of chanting where one side of the choir alternately responds to the other. However, Ambrosian chant was named in his honor due to his contributions to the music of the Church. With Augustine, Ambrose was traditionally credited with composing the hymn "Te Deum". Since the hymnologist Guido Maria Dreves in 1893, however, scholars have dismissed this attribution. Writings Source: All works are originally in Latin. Following each is where it may be found in a standard compilation of Ambrose's writings. His first work was probably De paradiso (377–378). Most have approximate dates, and works such as De Helia et ieiunio (377–391), Expositio evangelii secundum Lucam (377–389) and De officiis ministrorum (377–391) have been given a wide variety of datings by scholars. His best known work is probably De officiis ministrorum (377–391), while the (386–390) and De obitu Theodosii (395) are among his most noted works. In matters of exegesis he is, like Hilary, an Alexandrian. In dogma he follows Basil of Caesarea and other Greek authors, but nevertheless gives a distinctly Western cast to the speculations of which he treats. This is particularly manifest in the weightier emphasis which he lays upon human sin and divine grace, and in the place which he assigns to faith in the individual Christian life. There has been debate on the attribution of some writings: for example De mysteriis is usually attributed to Ambrose, while the related De sacramentis is written in a different style with some silent disagreements, so there is less consensus over its author. Exegesis (; ; ) (; ; ) (; ; ) (; ) (; ) (; ; ) (; ; ) (; ; ) (; ; ) (; ; ) (; ; ) (; ) () (; ) (; ; ) (; ) (; ) (; ) () (; ; ) Moral and ascetical commentary () () () () () Dogmatic writings (; ) (; ; ) (; ; ) ; ) (; ; ) (; ) () (fragmented; ) Sermons (; ; ) (; ; ) (; ; ) () Others 91 letters Ambrosiaster or the "pseudo-Ambrose" is a brief commentary on Paul's Epistles, which was long attributed to Ambrose. Editions The history of the editions of the works of St. Ambrose is a long one. Erasmus edited them in four tomes at Basle (1527). A valuable Roman edition was brought out in 1580, in five volumes, the result of many years' labour; it was begun by Sixtus V, while yet the monk Felice Peretti. Prefixed to it is the life of St. Ambrose composed by Baronius for his Annales Ecclesiastici. The excellent Maurist edition of du Frische and Le Nourry appeared at Paris (1686–90) in two folio volumes; it was twice reprinted at Venice (1748–51, and 1781–82). The latest edition of the writings of St. Ambrose is that of Paolo Angelo Ballerini (Milan, 1878) in six folio volumes. Standard editions Based on the Maurist edition published in Paris by Jacques Du Frische and Denis-Nicolas Le Nourry. Based on the Maurist edition published in Paris by Jacques Du Frische and Denis-Nicolas Le Nourry. Latin Hexameron, De paradiso, De Cain, De Noe, De Abraham, De Isaac, De bono mortis – ed. C. Schenkl 1896, Vol. 32/1 (In Latin) De Iacob, De Ioseph, De patriarchis, De fuga saeculi, De interpellatione Iob et David, De apologia prophetae David, De Helia, De Nabuthae, De Tobia – ed. C. Schenkl 1897, Vol. 32/2 Expositio evangelii secundum Lucam – ed. C. Schenkl 1902, Vol. 32/4 Expositio de psalmo CXVIII – ed. M. Petschenig 1913, Vol. 62; editio altera supplementis aucta – cur. M. Zelzer 1999 Explanatio super psalmos XII – ed. M. Petschenig 1919, Vol. 64; editio altera supplementis aucta – cur. M. Zelzer 1999 Explanatio symboli, De sacramentis, De mysteriis, De paenitentia, De excessu fratris Satyri, De obitu Valentiniani, De obitu Theodosii – ed. Otto Faller 1955, Vol. 73 De fide ad Gratianum Augustum – ed. Otto Faller 1962, Vol. 78 De spiritu sancto, De incarnationis dominicae sacramento – ed. Otto Faller 1964, Vol. 79 Epistulae et acta – ed. Otto Faller (Vol. 82/1: lib. 1–6, 1968); Otto Faller, M. Zelzer ( Vol. 82/2: lib. 7–9, 1982); M. Zelzer ( Vol. 82/3: lib. 10, epp. extra collectionem. gesta concilii Aquileiensis, 1990); Indices et addenda – comp. M. Zelzer, 1996, Vol. 82/4 English H. Wace and P. Schaff, eds, A Select Library of Nicene and Post–Nicene Fathers of the Christian Church, 2nd ser., x [Contains translations of De Officiis (under the title De Officiis Ministrorum), De Spiritu Sancto (On the Holy Spirit), De excessu fratris Satyri (On the Decease of His Brother Satyrus), Exposition of the Christian Faith, De mysteriis (Concerning Mysteries), De paenitentia (Concerning Repentance), De virginibus (Concerning Virgins), De viduis (Concerning Widows), and a selection of letters] St. Ambrose "On the mysteries" and the treatise on the sacraments by an unknown author, translated by T Thompson, (London: SPCK, 1919) [translations of De sacramentis and De mysteriis; rev edn published 1950] S. Ambrosii De Nabuthae: a commentary, translated by Martin McGuire, (Washington, DC: The Catholic University of America, 1927) [translation of On Naboth] S. Ambrosii De Helia et ieiunio: a commentary, with an introduction and translation, Sister Mary Joseph Aloysius Buck, (Washington, DC: The Catholic University of America, 1929) [translation of On Elijah and Fasting] S. Ambrosii De Tobia: a commentary, with an introduction and translation, Lois Miles Zucker, (Washington, DC: The Catholic University of America, 1933) [translation of On Tobit] Funeral orations, translated by LP McCauley et al., Fathers of the Church vol 22, (New York: Fathers of the Church, Inc., 1953) [by Gregory of Nazianzus and Ambrose], Letters, translated by Mary Melchior Beyenka, Fathers of the Church, vol 26, (Washington, DC: Catholic University of America, 1954) [Translation of letters 1–91] Saint Ambrose on the sacraments, edited by Henry Chadwick, Studies in Eucharistic faith and practice 5, (London: AR Mowbray, 1960) Hexameron, Paradise, and Cain and Abel, translated by John J Savage, Fathers of the Church, vol 42, (New York: Fathers of the Church, 1961) [contains translations of Hexameron, De paradise, and De Cain et Abel] Saint Ambrose: theological and dogmatic works, translated by Roy J. Deferrari, Fathers of the church vol 44, (Washington: Catholic University of American Press, 1963) [Contains translations of The mysteries, (De mysteriis) The holy spirit, (De Spiritu Sancto), The sacrament of the incarnation of Our Lord, (De incarnationis Dominicae sacramento), and The sacraments] Seven exegetical works, translated by Michael McHugh, Fathers of the Church, vol 65, (Washington: Catholic University of America Press, 1972) [Contains translations of Isaac, or the soul, (De Isaac vel anima), Death as a good, (De bono mortis), Jacob and the happy life, (De Iacob et vita beata), Joseph, (De Ioseph), The patriarchs, (De patriarchis), Flight from the world, (De fuga saeculi), The prayer of Job and David, (De interpellatione Iob et David).] Homilies of Saint Ambrose on Psalm 118, translated by Íde Ní Riain, (Dublin: Halcyon Press, 1998) [translation of part of Explanatio psalmorum] Ambrosian hymns, translated by Charles Kraszewski, (Lehman, PA: Libella Veritatis, 1999) Commentary of Saint Ambrose on twelve psalms, translated by Íde M. Ní Riain, (Dublin: Halcyon Press, 2000) [translations of Explanatio psalmorum on Psalms 1, 35–40, 43, 45, 47–49] On Abraham, translated by Theodosia Tomkinson, (Etna, CA: Center for Traditionalist Orthodox Studies, 2000) [translation of De Abraham] De officiis, edited with an introduction, translation, and commentary by Ivor J Davidson, 2 vols, (Oxford: OUP, 2001) [contains both Latin and English text] Commentary of Saint Ambrose on the Gospel according to Saint Luke, translated by Íde M. Ní Riain, (Dublin: Halcyon, 2001) [translation of Expositio evangelii secundum Lucam] Ambrose of Milan: political letters and speeches, translated with an introduction and notes by JHWG Liebschuetz, (Liverpool: Liverpool University Press, 2005) [contains Book Ten of Ambrose's Letters, including the oration on the death of Theodosius I; Letters outside the Collection (Epistulae extra collectionem); Letter 30 to Magnus Maximus; The oration on the death of Valentinian II (De obitu Valentiniani).] Several of Ambrose's works have recently been published in the bilingual Latin-German Fontes Christiani series (currently edited by Brepols). See also Ambrosian hymnography Ambrosian Liturgy and Rite Saint Ambrose Basilica, Milan Church Fathers St. Ambrose Cathedral, Linares Saint Ambrose University, Davenport, Iowa Ambrose University College, Calgary, Alberta References Notes Citations Works cited Further reading External links Christian Classics Ethereal Library, Works of Ambrose of Milan Hymni Ambrosii (Latin) EarlyChurch.org.uk Extensive bibliography Ambrose's works: text, concordances and frequency list Ambrose at The Online Library of Liberty'' Opera Omnia Ambrose in Anglo-Saxon England, with Pseudo-Ambrose and Ambrosiaster, Contributions to Sources of Anglo-Saxon Literary Culture, by Dabney Anderson Bankert, Jessica Wegmann, and Charles D. Wright. "Saint Ambrose" at the Christian Iconography website Forum about the "ambrosian rite" "Of St. Ambrose" from the Caxton translation of the Golden Legend Augustine's account of the penitence of Theodosius Works of Santo Ambrósio at the National Library of Portugal Ambrosius 340s births Year of birth unknown 397 deaths 4th-century Italian bishops 4th-century Christian saints 4th-century Christian theologians 4th-century Gallo-Roman people 4th-century writers in Latin 4th-century philosophers 4th-century Romans Bishops of Milan Burials at the Basilica of Sant'Ambrogio Catholic Mariology Catholic philosophers Christian ethicists Christian hymnwriters Church Fathers Doctors of the Church Gallo-Roman saints Hymnographers Insects in religion Letter writers in Latin People from Trier Roman Empire hymnwriters Ancient Roman poets Anglican saints Religion in Lombardy

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https://en.wikipedia.org/wiki/Alabaster

Alabaster

Alabaster is a mineral and a soft rock used for carvings and as a source of plaster powder. Archaeologists, geologists, and the stone industry have different definitions and usages for the word alabaster. In archaeology, the term alabaster is a category of objects and artefacts made from the varieties of two different minerals: (i) the fine-grained, massive type of gypsum, and (ii) the fine-grained, banded type of calcite. In geology, gypsum is a type of alabaster that chemically is a hydrous sulfate of calcium, whereas calcite is a carbonate of calcium. As types of alabaster, gypsum and calcite have similar properties, such as light color, translucence, and soft stones that can be carved and sculpted; thus the historical use and application of alabaster for the production of carved, decorative artefacts and objets d’art. Calcite alabaster also is known as: onyx-marble, Egyptian alabaster, and Oriental alabaster, which terms usually describe either a compact, banded travertine stone or a stalagmitic limestone colored with swirling bands of cream and brown. In general, ancient alabaster is calcite in the wider Middle East, including Egypt and Mesopotamia, while it is gypsum in medieval Europe. Modern alabaster is most likely calcite but may be either. Both are easy to work and slightly soluble in water. They have been used for making a variety of indoor artwork and carving, as they will not survive long outdoors. The two kinds are readily distinguished by their different hardnesses: gypsum alabaster (Mohs hardness 1.5 to 2) is so soft that a fingernail scratches it, while calcite (Mohs hardness 3) cannot be scratched in this way but yields to a knife. Moreover, calcite alabaster, being a carbonate, effervesces when treated with hydrochloric acid, while gypsum alabaster remains almost unaffected. Etymology The English word "alabaster" was borrowed from Old French , in turn derived from Latin , and that from Greek () or (). The Greek words denoted a vase of alabaster. The name may be derived further from ancient Egyptian , which refers to vessels of the Egyptian goddess Bast. She was represented as a lioness and frequently depicted as such in figures placed atop these alabaster vessels. Ancient Roman authors Pliny the Elder and Ptolemy wrote that the stone used for ointment jars called alabastra came from a region of Egypt known as Alabastron or Alabastrites. Properties and usability The purest alabaster is a snow-white material of fine uniform grain, but it often is associated with an oxide of iron, which produces brown clouding and veining in the stone. The coarser varieties of gypsum alabaster are converted by calcination into plaster of Paris, and are sometimes known as "plaster stone". The softness of alabaster enables it to be carved readily into elaborate forms, but its solubility in water renders it unsuitable for outdoor work. If alabaster with a smooth, polished surface is washed with dishwashing liquid, it will become rough, dull and whiter, losing most of its translucency and lustre. The finer kinds of alabaster are employed largely as an ornamental stone, especially for ecclesiastical decoration and for the rails of staircases and halls. Modern processing Working techniques Alabaster is mined and then sold in blocks to alabaster workshops. There they are cut to the needed size ("squaring"), and then are processed in different techniques: turned on a lathe for round shapes, carved into three-dimensional sculptures, chiselled to produce low relief figures or decoration; and then given an elaborate finish that reveals its transparency, colour, and texture. Marble imitation In order to diminish the translucency of the alabaster and to produce an opacity suggestive of true marble, the statues are immersed in a bath of water and heated gradually—nearly to the boiling point—an operation requiring great care, because if the temperature is not regulated carefully, the stone acquires a dead-white, chalky appearance. The effect of heating appears to be a partial dehydration of the gypsum. If properly treated, it very closely resembles true marble and is known as "marmo di Castellina". Dyeing Alabaster is a porous stone and can be "dyed" into any colour or shade, a technique used for centuries. For this the stone needs to be fully immersed in various pigmentary solutions and heated to a specific temperature. The technique can be used to disguise alabaster. In this way a very misleading imitation of coral that is called "alabaster coral" is produced. Types, occurrence, history Typically only one type is sculpted in any particular cultural environment, but sometimes both have been worked to make similar pieces in the same place and time. This was the case with small flasks of the alabastron type made in Cyprus from the Bronze Age into the Classical period. Window panels When cut in thin sheets, alabaster is translucent enough to be used for small windows. It was used for this purpose in Byzantine churches and later in medieval ones, especially in Italy. Large sheets of Aragonese gypsum alabaster are used extensively in the contemporary Cathedral of Our Lady of the Angels, which was dedicated in 2002 by the Los Angeles, California, Archdiocese. The cathedral incorporates special cooling to prevent the panes from overheating and turning opaque. The ancients used the calcite type, while the modern Los Angeles cathedral is using gypsum alabaster. There are also multiple examples of alabaster windows in ordinary village churches and monasteries in northern Spain. Calcite alabaster Calcite alabaster, harder than the gypsum variety, was the kind primarily used in ancient Egypt and the wider Middle East (but not Assyrian palace reliefs), and is also used in modern times. It is found as either a stalagmitic deposit from the floor and walls of limestone caverns, or as a kind of travertine, similarly deposited in springs of calcareous water. Its deposition in successive layers gives rise to the banded appearance that the marble often shows on cross-section, from which its name is derived: onyx-marble or alabaster-onyx, or sometimes simply (and wrongly) as onyx. Egypt and the Middle East Egyptian alabaster has been worked extensively near Suez and Assiut. This stone variety is the "alabaster" of the ancient Egyptians and Bible and is often termed Oriental alabaster, since the early examples came from the Far East. The Greek name alabastrites is said to be derived from the town of Alabastron in Egypt, where the stone was quarried. The locality probably owed its name to the mineral; the origin of the mineral name is obscure (though see above). The "Oriental" alabaster was highly esteemed for making small perfume bottles or ointment vases called alabastra; the vessel name has been suggested as a possible source of the mineral name. In Egypt, craftsmen used alabaster for canopic jars and various other sacred and sepulchral objects. The sarcophagus of Seti I, found in his tomb near Thebes, is on display in Sir John Soane's Museum, London; it is carved in a single block of translucent calcite alabaster from Alabastron. Algerian onyx-marble has been quarried largely in the province of Oran. Calcite alabaster was quarried in ancient Israel in the cave known today as the Twins Cave near Beit Shemesh. Herod used this alabaster for baths in his palaces. North America In Mexico, there are famous deposits of a delicate green variety at La Pedrara, in the district of Tecali, near Puebla. Onyx-marble occurs also in the district of Tehuacán and at several localities in the US including California, Arizona, Utah, Colorado and Virginia. Gypsum alabaster Gypsum alabaster is the softer of the two varieties, the other being calcite alabaster. It was used primarily in medieval Europe, and is also used in modern times. Ancient and Classical Near East "Mosul marble" is a kind of gypsum alabaster found in the north of modern Iraq, which was used for the Assyrian palace reliefs of the 9th to 7th centuries BC; these are the largest type of alabaster sculptures to have been regularly made. The relief is very low and the carving detailed, but large rooms were lined with continuous compositions on slabs around high. The Lion Hunt of Ashurbanipal and military Lachish reliefs, both 7th century and in the British Museum, are some of the best known. Gypsum alabaster was widely used for small sculpture for indoor use in the ancient world, especially in ancient Egypt and Mesopotamia. Fine detail could be obtained in a material with an attractive finish without iron or steel tools. Alabaster was used for vessels dedicated for use in the cult of the deity Bast in the culture of the ancient Egyptians, and thousands of gypsum alabaster artifacts dating to the late 4th millennium BC also have been found in Tell Brak (present day Nagar), in Syria. In Mesopotamia, gypsum alabaster was the material of choice for figures of deities and devotees in temples, as in a figure believed to represent the deity Abu dating to the first half of the 3rd millennium BC and currently kept in New York. Aragon, Spain Much of the world's alabaster extraction is performed in the centre of the Ebro Valley in Aragon, Spain, which has the world's largest known exploitable deposits. According to a brochure published by the Aragon government, alabaster has elsewhere either been depleted, or its extraction is so difficult that it has almost been abandoned or is carried out at a very high cost. There are two separate sites in Aragon, both are located in Tertiary basins. The most important site is the Fuentes-Azaila area, in the Tertiary Ebro Basin. The other is the Calatayud-Teruel Basin, which divides the Iberian Range in two main sectors (NW and SE). The abundance of Aragonese alabaster was crucial for its use in architecture, sculpture and decoration. There is no record of likely use by pre-Roman cultures, so perhaps the first ones to use alabaster in Aragon were the Romans, who produced vessels from alabaster following the Greek and Egyptian models. It seems that since the reconstruction of the Roman Wall in Zaragoza in the 3rd century AD with alabaster, the use of this material became common in building for centuries. Muslim Saraqusta (today, Zaragoza) was also called "Medina Albaida", the White City, due to the appearance of its alabaster walls and palaces, which stood out among gardens, groves and orchards by the Ebro and Huerva Rivers. The oldest remains in the Aljafería Palace, together with other interesting elements like capitals, reliefs and inscriptions, were made using alabaster, but it was during the artistic and economic blossoming of the Renaissance that Aragonese alabaster reached its golden age. In the 16th century sculptors in Aragon chose alabaster for their best works. They were adept at exploiting its lighting qualities and generally speaking the finished art pieces retained their natural color. Volterra (Tuscany) In Europe, the centre of the alabaster trade today is Florence, Italy. Tuscan alabaster occurs in nodular masses embedded in limestone, interstratified with marls of Miocene and Pliocene age. The mineral is worked largely by means of underground galleries, in the district of Volterra. Several varieties are recognized—veined, spotted, clouded, agatiform, and others. The finest kind, obtained principally from Castellina, is sent to Florence for figure-sculpture, while the common kinds are carved locally, into vases, lights, and various ornamental objects. These items are objects of extensive trade, especially in Florence, Pisa, and Livorno. In the 3rd century BC the Etruscans used the alabaster of Tuscany from the area of modern-day Volterra to produce funeral urns, possibly taught by Greek artists. During the Middle Ages the craft of alabaster was almost completely forgotten. A revival started in the mid-16th century, and until the beginning of the 17th century alabaster work was strictly artistic and did not expand to form a large industry. In the 17th and 18th centuries production of artistic, high-quality Renaissance-style artifacts stopped altogether, being replaced by less sophisticated, cheaper items better suited for large-scale production and commerce. The new industry prospered, but the reduced need of skilled craftsmen left only few still working. The 19th century brought a boom to the industry, largely due to the "traveling artisans" who went and offered their wares to the palaces of Europe, as well as to America and the East. In the 19th century new processing technology was also introduced, allowing for the production of custom-made, unique pieces, as well as the combination of alabaster with other materials. Apart from the newly developed craft, artistic work became again possible, chiefly by Volterran sculptor Albino Funaioli. After a short slump, the industry was revived again by the sale of mass-produced mannerist Expressionist sculptures, and was further enhanced in the 1920s by a new branch creating ceiling and wall lamps in the Art Deco style and culminating in the participation at the 1925 International Exposition of Modern Industrial and Decorative Arts from Paris. Important names from the evolution of alabaster use after World War II are Volterran Umberto Borgna, the "first alabaster designer", and later on the architect and industrial designer Angelo Mangiarotti. England and Wales Gypsum alabaster is a common mineral, which occurs in England in the Keuper marls of the Midlands, especially at Chellaston in Derbyshire, at Fauld in Staffordshire, and near Newark in Nottinghamshire. Deposits at all of these localities have been worked extensively. In the 14th and 15th centuries its carving into small statues and sets of relief panels for altarpieces was a valuable local industry in Nottingham, as well as a major English export. These were usually painted, or partly painted. It was also used for the effigies, often life size, on tomb monuments, as the typical recumbent position suited the material's lack of strength, and it was cheaper and easier to work than good marble. After the English Reformation the making of altarpiece sets was discontinued, but funerary monument work in reliefs and statues continued. Besides examples of these carvings still in Britain (especially at the Nottingham Castle Museum, British Museum, and Victoria and Albert Museum), trade in mineral alabaster (rather than just the antiques trade) has scattered examples in the material that may be found as far afield as the Musée de Cluny, Spain, and Scandinavia. Alabaster also is found, although in smaller quantity, at Watchet in Somerset, near Penarth in Glamorganshire, and elsewhere. In Cumbria it occurs largely in the New Red rocks, but at a lower geological horizon. The alabaster of Nottinghamshire and Derbyshire is found in thick nodular beds or "floors" in spheroidal masses known as "balls" or "bowls" and in smaller lenticular masses termed "cakes". At Chellaston, where the local alabaster is known as "Patrick", it has been worked into ornaments under the name of "Derbyshire spar"―a term more properly applied to fluorspar. Black alabaster Black alabaster is a rare anhydrite form of the gypsum-based mineral. This black form is found in only three veins in the world, one each in United States, Italy, and China. Alabaster Caverns State Park, near Freedom, Oklahoma, is home to a natural gypsum cave in which much of the gypsum is in the form of alabaster. There are several types of alabaster found at the site, including pink, white, and the rare black alabaster. Gallery Ancient and Classical Near East European Middle Ages Modern See also Mineralogy – mineral consisting of calcium carbonate (); archaeologists and stone trade professionals, unlike mineralogists, call one variety of calcite "alabaster" – mineral composed of calcium sulfate dihydrate (); alabaster is one of its varieties – a mineral closely related to gypsum – the main inorganic compound () of gypsum – translucent sheets of marble or alabaster used during the Early Middle Ages for windows instead of glass Window and roof panels Chronological list of examples: – 5th century, Ravenna – 6th century, Ravenna – mainly 13th–14th century, Valencia, Spain; the lantern of the octagonal crossing tower – 14th-century, Orvieto, Umbria, central Italy – 17th century, Rome; alabaster window by Bernini (1598–1680) used to create a "spotlight" – 1924, Jerusalem, architect: Antonio Barluzzi. Windows fitted with dyed alabaster panels. – 1924, Mount Tabor, architect: Antonio Barluzzi. Alabaster roofing was attempted. References Further reading Harrell J.A. (1990), "Misuse of the term 'alabaster' in Egyptology", Göttinger Miszellen, 119, pp. 37–42. Mackintosh-Smith T. (1999), "Moonglow from Underground". Aramco World May–June 1999. External links More about alabaster and travertine, brief guide explaining the confusing, different use of the same terms by geologists, archaeologists and the stone trade. Oxford University Museum of Natural History, 2012 Alabaster Craftmanship in Volterra Calcium minerals Carbonate minerals Sulfate minerals Minerals Stone (material) Sculpture materials Bastet

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ASIC (disambiguation)

In the realm of electronic technology, ASIC stands for application-specific integrated circuit, an integrated circuit customized for a specific task. ASIC may also refer to: Accreditation Service for International Colleges, an educational accreditation agency in the UK Acid-sensing ion channels, a protein family Air and Space Interoperability Council , former name of the Air Force Interoperability Council Arfoire Syndicate of International Crime, the antagonist group in the video game Hyperdimension Neptunia mk2 ASIC programming language, a dialect of BASIC Associated Signature Containers (ASiC), specifies the use of container structures to bind together one or more signed objects with either advanced electronic signatures or time-stamp tokens into one single digital container Association Scientifique Internationale pour le Café, a scientific organization based in France Australian Securities & Investments Commission, Australia's corporate regulator Aviation Security Identification Card, an Australian identification card See also Asics, an athletic equipment company

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https://en.wikipedia.org/wiki/Amazing%20Grace

Amazing Grace

"Amazing Grace" is a Christian hymn published in 1779 with words written in 1772 by English Anglican clergyman and poet John Newton (1725–1807). It is an immensely popular hymn, particularly in the United States, where it is used for both religious and secular purposes. Newton wrote the words from personal experience; he grew up without any particular religious conviction, but his life's path was formed by a variety of twists and coincidences that were often put into motion by others' reactions to what they took as his recalcitrant insubordination. He was pressed into service with the Royal Navy, and after leaving the service, he became involved in the Atlantic slave trade. In 1748, a violent storm battered his vessel off the coast of County Donegal, Ireland, so severely that he called out to God for mercy. While this moment marked his spiritual conversion, he continued slave trading until 1754 or 1755, when he ended his seafaring altogether. Newton began studying Christian theology and later became an abolitionist. Ordained in the Church of England in 1764, Newton became the curate of Olney, Buckinghamshire, where he began to write hymns with poet William Cowper. "Amazing Grace" was written to illustrate a sermon on New Year's Day of 1773. It is unknown if there was any music accompanying the verses; it may have been chanted by the congregation. It debuted in print in 1779 in Newton's and Cowper's Olney Hymns, but settled into relative obscurity in England. In the United States, "Amazing Grace" became a popular song used by Baptist and Methodist preachers as part of their evangelizing, especially in the American South, during the Second Great Awakening of the early 19th century. It has been associated with more than 20 melodies. In 1835, American composer William Walker set it to the tune known as "New Britain" in a shape note format; this is the version most frequently sung today. With the message that forgiveness and redemption are possible regardless of sins committed and that the soul can be delivered from despair through the mercy of God, "Amazing Grace" is one of the most recognisable songs in the English-speaking world. American historian Gilbert Chase writes that it is "without a doubt the most famous of all the folk hymns" and Jonathan Aitken, a Newton biographer, estimates that the song is performed about 10 million times annually. It has had particular influence in folk music, and has become an emblematic black spiritual. Its universal message has been a significant factor in its crossover into secular music. "Amazing Grace" became newly popular during the 1960s revival of American folk music, and it has been recorded thousands of times during and since the 20th century. John Newton's conversion According to the Dictionary of American Hymnology, "Amazing Grace" is John Newton's spiritual autobiography in verse. In 1725, Newton was born in Wapping, a district in London near the Thames. His father was a shipping merchant who was brought up as a Catholic but had Protestant sympathies, and his mother was a devout Independent, unaffiliated with the Anglican Church. She had intended Newton to become a clergyman, but she died of tuberculosis when he was six years old. For the next few years, while his father was at sea Newton was raised by his emotionally distant stepmother. He was also sent to boarding school, where he was mistreated. At the age of eleven, he joined his father on a ship as an apprentice; his seagoing career would be marked by headstrong disobedience. As a youth, Newton began a pattern of coming very close to death, examining his relationship with God, then relapsing into bad habits. As a sailor, he denounced his faith after being influenced by a shipmate who discussed with him Characteristicks of Men, Manners, Opinions, Times, a book by the Third Earl of Shaftesbury. In a series of letters Newton later wrote, "Like an unwary sailor who quits his port just before a rising storm, I renounced the hopes and comforts of the Gospel at the very time when every other comfort was about to fail me." His disobedience caused him to be pressed into the Royal Navy, and he took advantage of opportunities to overstay his leave. He deserted the navy to visit Mary "Polly" Catlett, a family friend with whom he had fallen in love. After enduring humiliation for deserting, he was traded as crew to a slave ship. He began a career in slave trading. Newton often openly mocked the captain by creating obscene poems and songs about him, which became so popular that the crew began to join in. His disagreements with several colleagues resulted in his being starved almost to death, imprisoned while at sea, and chained like the slaves they carried. He was himself enslaved by the Sherbro and forced to work on a plantation in Sierra Leone near the Sherbro River. After several months he came to think of Sierra Leone as his home, but his father intervened after Newton sent him a letter describing his circumstances, and crew from another ship happened to find him. Newton claimed the only reason he left Sierra Leone was because of Polly. While aboard the ship Greyhound, Newton gained notoriety as being one of the most profane men the captain had ever met. In a culture where sailors habitually swore, Newton was admonished several times for not only using the worst words the captain had ever heard, but creating new ones to exceed the limits of verbal debauchery. In March 1748, while the Greyhound was in the North Atlantic, a violent storm came upon the ship that was so rough it swept overboard a crew member who was standing where Newton had been moments before. After hours of the crew emptying water from the ship and expecting to be capsized, Newton and another mate tied themselves to the ship's pump to keep from being washed overboard, working for several hours. After proposing the measure to the captain, Newton had turned and said, "If this will not do, then Lord have mercy upon us!" Newton rested briefly before returning to the deck to steer for the next eleven hours. During his time at the wheel, he pondered his divine challenge. About two weeks later, the battered ship and starving crew landed in Lough Swilly, Ireland. For several weeks before the storm, Newton had been reading The Christian's Pattern, a summary of the 15th-century The Imitation of Christ by Thomas à Kempis. The memory of his own "Lord have mercy upon us!" uttered during a moment of desperation in the storm did not leave him; he began to ask if he was worthy of God's mercy or in any way redeemable. Not only had he neglected his faith but directly opposed it, mocking others who showed theirs, deriding and denouncing God as a myth. He came to believe that God had sent him a profound message and had begun to work through him. Newton's conversion was not immediate, but he contacted Polly's family and announced his intention to marry her. Her parents were hesitant as he was known to be unreliable and impetuous. They knew he was profane too but allowed him to write to Polly, and he set to begin to submit to authority for her sake. He sought a place on a slave ship bound for Africa, and Newton and his crewmates participated in most of the same activities he had written about before; the only immorality from which he was able to free himself was profanity. After a severe illness his resolve was renewed, yet he retained the same attitude towards slavery as was held by his contemporaries. Newton continued in the slave trade through several voyages where he sailed the coasts of Africa, now as a captain, and procured slaves being offered for sale in larger ports, transporting them to North America. In between voyages, he married Polly in 1750, and he found it more difficult to leave her at the beginning of each trip. After three shipping voyages in the slave trade, Newton was promised a position as ship's captain with cargo unrelated to slavery. But at the age of thirty, he collapsed and never sailed again. Olney curate Working as a customs agent in Liverpool starting in 1756, Newton began to teach himself Latin, Greek, and theology. He and Polly immersed themselves in the church community, and Newton's passion was so impressive that his friends suggested he become a priest in the Church of England. He was turned down by John Gilbert, Archbishop of York, in 1758, ostensibly for having no university degree, although the more likely reasons were his leanings toward evangelism and tendency to socialise with Methodists. Newton continued his devotions, and after being encouraged by a friend, he wrote about his experiences in the slave trade and his conversion. William Legge, 2nd Earl of Dartmouth, impressed with his story, sponsored Newton for ordination by John Green, Bishop of Lincoln, and offered him the curacy of Olney, Buckinghamshire, in 1764. Olney Hymns Olney was a village of about 2,500 residents whose main industry was making lace by hand. The people were mostly illiterate and many of them were poor. Newton's preaching was unique in that he shared many of his own experiences from the pulpit; many clergy preached from a distance, not admitting any intimacy with temptation or sin. He was involved in his parishioners' lives and was much loved, although his writing and delivery were sometimes unpolished. But his devotion and conviction were apparent and forceful, and he often said his mission was to "break a hard heart and to heal a broken heart". He struck a friendship with William Cowper, a gifted writer who had failed at a career in law and suffered bouts of insanity, attempting suicide several times. Cowper enjoyed Olney and Newton's company; he was also new to Olney and had gone through a spiritual conversion similar to Newton's. Together, their effect on the local congregation was impressive. In 1768, they found it necessary to start a weekly prayer meeting to meet the needs of an increasing number of parishioners. They also began writing lessons for children. Partly from Cowper's literary influence, and partly because learned vicars were expected to write verses, Newton began to try his hand at hymns, which had become popular through the language, made plain for common people to understand. Several prolific hymn writers were at their most productive in the 18th century, including Isaac Watts whose hymns Newton had grown up hearing and Charles Wesley, with whom Newton was familiar. Wesley's brother John, the eventual founder of the Methodist Church, had encouraged Newton to go into the clergy. Watts was a pioneer in English hymn writing, basing his work after the Psalms. The most prevalent hymns by Watts and others were written in the common meter in 8.6.8.6: the first line is eight syllables and the second is six. Newton and Cowper attempted to present a poem or hymn for each prayer meeting. The lyrics to "Amazing Grace" were written in late 1772 and probably used in a prayer meeting for the first time on 1 January 1773. A collection of the poems Newton and Cowper had written for use in services at Olney was bound and published anonymously in 1779 under the title Olney Hymns. Newton contributed 280 of the 348 texts in Olney Hymns; "1 Chronicles 17:16–17, Faith's Review and Expectation" was the title of the poem with the first line "Amazing grace! (how sweet the sound)". Critical analysis The general impact of Olney Hymns was immediate and it became a widely popular tool for evangelicals in Britain for many years. Scholars appreciated Cowper's poetry somewhat more than Newton's plaintive and plain language, expressing his forceful personality. The most prevalent themes in the verses written by Newton in Olney Hymns are faith in salvation, wonder at God's grace, his love for Jesus, and his cheerful exclamations of the joy he found in his faith. As a reflection of Newton's connection to his parishioners, he wrote many of the hymns in first person, admitting his own experience with sin. Bruce Hindmarsh in Sing Them Over Again To Me: Hymns and Hymnbooks in America considers "Amazing Grace" an excellent example of Newton's testimonial style afforded by the use of this perspective. Several of Newton's hymns were recognised as great work ("Amazing Grace" was not among them), while others seem to have been included to fill in when Cowper was unable to write. Jonathan Aitken calls Newton, specifically referring to "Amazing Grace", an "unashamedly middlebrow lyricist writing for a lowbrow congregation", noting that only twenty-one of the nearly 150 words used in all six verses have more than one syllable. William Phipps in the Anglican Theological Review and author James Basker have interpreted the first stanza of "Amazing Grace" as evidence of Newton's realisation that his participation in the slave trade was his wretchedness, perhaps representing a wider common understanding of Newton's motivations. Newton joined forces with William Wilberforce, the British Member of Parliament who led the Parliamentarian campaign to abolish the slave trade in the British Empire, culminating in the Slave Trade Act 1807. But Newton did not become an ardent and outspoken abolitionist until after he left Olney in the 1780s; he is not known to have connected writing the hymn known as "Amazing Grace" to anti-slavery sentiments. The lyrics in Olney Hymns were arranged by their association to the Biblical verses that would be used by Newton and Cowper in their prayer meetings, and did not address any political objective. For Newton, the beginning of the year was a time to reflect on one's spiritual progress. At the same time he completed a diary which has since been lost that he had begun 17 years before, two years after he quit sailing. The last entry of 1772 was a recounting of how much he had changed since then. The title ascribed to the hymn, "1 Chronicles 17:16–17", refers to David's reaction to the prophet Nathan telling him that God intends to maintain his family line forever. Some Christians interpret this as a prediction that Jesus Christ, as a descendant of David, was promised by God as the salvation for all people. Newton's sermon on that January day in 1773 focused on the necessity to express one's gratitude for God's guidance, that God is involved in the daily lives of Christians though they may not be aware of it, and that patience for deliverance from the daily trials of life is warranted when the glories of eternity await. Newton saw himself a sinner like David who had been chosen, perhaps undeservedly, and was humbled by it. According to Newton, unconverted sinners were "blinded by the god of this world" until "mercy came to us not only undeserved but undesired ... our hearts endeavored to shut him out till he overcame us by the power of his grace." The New Testament served as the basis for many of the lyrics of "Amazing Grace". The first verse, for example, can be traced to the story of the Prodigal Son. In the Gospel of Luke the father says, "For this son of mine was dead and is alive again; he was lost, and is found". The story of Jesus healing a blind man who tells the Pharisees that he can now see is told in the Gospel of John. Newton used the words "I was blind but now I see" and declared "Oh to grace how great a debtor!" in his letters and diary entries as early as 1752. The effect of the lyrical arrangement, according to Bruce Hindmarsh, allows an instant release of energy in the exclamation "Amazing grace!", to be followed by a qualifying reply in "how sweet the sound". In An Annotated Anthology of Hymns, Newton's use of an exclamation at the beginning of his verse is called "crude but effective" in an overall composition that "suggest(s) a forceful, if simple, statement of faith". Grace is recalled three times in the following verse, culminating in Newton's most personal story of his conversion, underscoring the use of his personal testimony with his parishioners. The sermon preached by Newton was his last of those that William Cowper heard in Olney, since Cowper's mental instability returned shortly thereafter. One author suggests Newton may have had his friend in mind, employing the themes of assurance and deliverance from despair for Cowper's benefit. Dissemination More than 60 of Newton and Cowper's hymns were republished in other British hymnals and magazines, but "Amazing Grace" was not, appearing only once in a 1780 hymnal sponsored by the Countess of Huntingdon. Scholar John Julian commented in his 1892 A Dictionary of Hymnology that outside of the United States, the song was unknown and it was "far from being a good example of Newton's finest work". Between 1789 and 1799, four variations of Newton's hymn were published in the US in Baptist, Dutch Reformed, and Congregationalist hymnodies; by 1830 Presbyterians and Methodists also included Newton's verses in their hymnals. Although it had its roots in England, "Amazing Grace" became an integral part of the Christian tapestry in the United States. The greatest influences in the 19th century that propelled "Amazing Grace" to spread across the US and become a staple of religious services in many denominations and regions were the Second Great Awakening and the development of shape note singing communities. A tremendous religious movement swept the US in the early 19th century, marked by the growth and popularity of churches and religious revivals that got their start on the frontier in Kentucky and Tennessee. Unprecedented gatherings of thousands of people attended camp meetings where they came to experience salvation; preaching was fiery and focused on saving the sinner from temptation and backsliding. Religion was stripped of ornament and ceremony, and made as plain and simple as possible; sermons and songs often used repetition to get across to a rural population of poor and mostly uneducated people the necessity of turning away from sin. Witnessing and testifying became an integral component to these meetings, where a congregation member or stranger would rise and recount his turn from a sinful life to one of piety and peace. "Amazing Grace" was one of many hymns that punctuated fervent sermons, although the contemporary style used a refrain, borrowed from other hymns, that employed simplicity and repetition such as: Simultaneously, an unrelated movement of communal singing was established throughout the South and Western states. A format of teaching music to illiterate people appeared in 1800. It used four sounds to symbolise the basic scale: fa-sol-la-fa-sol-la-mi-fa. Each sound was accompanied by a specifically shaped note and thus became known as shape note singing. The method was simple to learn and teach, so schools were established throughout the South and West. Communities would come together for an entire day of singing in a large building where they sat in four distinct areas surrounding an open space, one member directing the group as a whole. Other groups would sing outside, on benches set up in a square. Preachers used shape note hymns to teach people on the frontier and to raise the emotion of camp meetings. Most of the music was Christian, but the purpose of communal singing was not primarily spiritual. Communities either could not afford music accompaniment or rejected it out of a Calvinistic sense of simplicity, so the songs were sung a cappella. "New Britain" tune When originally used in Olney, it is unknown what music, if any, accompanied the verses written by John Newton. Contemporary hymnbooks did not contain music and were simply small books of religious poetry. The first known instance of Newton's lines joined to music was in A Companion to the Countess of Huntingdon's Hymns (London, 1808), where it is set to the tune "Hephzibah" by English composer John Jenkins Husband. Common meter hymns were interchangeable with a variety of tunes; more than twenty musical settings of "Amazing Grace" circulated with varying popularity until 1835, when American composer William Walker assigned Newton's words to a traditional song named "New Britain". This was an amalgamation of two melodies ("Gallaher" and "St. Mary"), first published in the Columbian Harmony by Charles H. Spilman and Benjamin Shaw (Cincinnati, 1829). Spilman and Shaw, both students at Kentucky's Centre College, compiled their tunebook both for public worship and revivals, to satisfy "the wants of the Church in her triumphal march". Most of the tunes had been previously published, but "Gallaher" and "St. Mary" had not. As neither tune is attributed and both show elements of oral transmission, scholars can only speculate that they are possibly of British origin. A manuscript from 1828 by Lucius Chapin, a famous hymn writer of that time, contains a tune very close to "St. Mary", but that does not mean that he wrote it. "Amazing Grace", with the words written by Newton and joined with "New Britain", the melody most currently associated with it, appeared for the first time in Walker's shape note tunebook Southern Harmony in 1847. It was, according to author Steve Turner, a "marriage made in heaven ... The music behind 'amazing' had a sense of awe to it. The music behind 'grace' sounded graceful. There was a rise at the point of confession, as though the author was stepping out into the open and making a bold declaration, but a corresponding fall when admitting his blindness." Walker's collection was enormously popular, selling about 600,000 copies all over the US when the total population was just over 20 million. Another shape note tunebook named The Sacred Harp (1844) by Georgia residents Benjamin Franklin White and Elisha J. King became widely influential and continues to be used. Another verse was first recorded in Harriet Beecher Stowe's immensely influential 1852 anti-slavery novel Uncle Tom's Cabin. Three verses were emblematically sung by Tom in his hour of deepest crisis. He sings the sixth and fifth verses in that order, and Stowe included another verse, not written by Newton, that had been passed down orally in African-American communities for at least 50 years. It was one of between 50 and 70 verses of a song titled "Jerusalem, My Happy Home", which was first published in a 1790 book called A Collection of Sacred Ballads: "Amazing Grace" came to be an emblem of a Christian movement and a symbol of the US itself as the country was involved in a great political experiment, attempting to employ democracy as a means of government. Shape-note singing communities, with all the members sitting around an open center, each song employing a different song leader, illustrated this in practice. Simultaneously, the US began to expand westward into previously unexplored territory that was often wilderness. The "dangers, toils, and snares" of Newton's lyrics had both literal and figurative meanings for Americans. This became poignantly true during the most serious test of American cohesion in the U.S. Civil War (1861–1865). "Amazing Grace", set to "New Britain", was included in two hymnals distributed to soldiers. With death so real and imminent, religious services in the military became commonplace. The hymn was translated into other languages as well: while on the Trail of Tears, the Cherokee sang Christian hymns as a way of coping with the ongoing tragedy, and a version of the song by Samuel Worcester that had been translated into the Cherokee language became very popular. Urban revival Although "Amazing Grace" set to "New Britain" was popular, other versions existed regionally. Primitive Baptists in the Appalachian region often used "New Britain" with other hymns, and sometimes sing the words of "Amazing Grace" to other folk songs, including titles such as "In the Pines", "Pisgah", "Primrose", and "Evan", as all are able to be sung in common meter, of which the majority of their repertoire consists. In the late 19th century, Newton's verses were sung to a tune named "Arlington" as frequently as to "New Britain" for a time. Two musical arrangers named Dwight Moody and Ira Sankey heralded another religious revival in the cities of the US and Europe, giving the song international exposure. Moody's preaching and Sankey's musical gifts were significant; their arrangements were the forerunners of gospel music, and churches all over the US were eager to acquire them. Moody and Sankey began publishing their compositions in 1875, and "Amazing Grace" appeared three times with three different melodies, but they were the first to give it its title; hymns were typically published using the incipits (first line of the lyrics), or the name of the tune such as "New Britain". Publisher Edwin Othello Excell gave the version of "Amazing Grace" set to "New Britain" immense popularity by publishing it in a series of hymnals that were used in urban churches. Excell altered some of Walker's music, making it more contemporary and European, giving "New Britain" some distance from its rural folk-music origins. Excell's version was more palatable for a growing urban middle class and arranged for larger church choirs. Several editions featuring Newton's first three stanzas and the verse previously included by Harriet Beecher Stowe in Uncle Tom's Cabin were published by Excell between 1900 and 1910. His version of "Amazing Grace" became the standard form of the song in American churches. Recorded versions With the advent of recorded music and radio, "Amazing Grace" began to cross over from primarily a gospel standard to secular audiences. The ability to record combined with the marketing of records to specific audiences allowed "Amazing Grace" to take on thousands of different forms in the 20th century. Where Edwin Othello Excell sought to make the singing of "Amazing Grace" uniform throughout thousands of churches, records allowed artists to improvise with the words and music specific to each audience. AllMusic lists over 1,000 recordings – including re-releases and compilations – as of 2019. Its first recording is an a cappella version from 1922 by the Sacred Harp Choir. It was included from 1926 to 1930 in Okeh Records' catalogue, which typically concentrated strongly on blues and jazz. Demand was high for black gospel recordings of the song by H. R. Tomlin and J. M. Gates. A poignant sense of nostalgia accompanied the recordings of several gospel and blues singers in the 1940s and 1950s who used the song to remember their grandparents, traditions, and family roots. It was recorded with musical accompaniment for the first time in 1930 by Fiddlin' John Carson, although to another folk hymn named "At the Cross", not to "New Britain". "Amazing Grace" is emblematic of several kinds of folk music styles, often used as the standard example to illustrate such musical techniques as lining out and call and response, that have been practised in both black and white folk music. Mahalia Jackson's 1947 version received significant radio airplay, and as her popularity grew throughout the 1950s and 1960s, she often sang it at public events such as concerts at Carnegie Hall. Author James Basker states that the song has been employed by African Americans as the "paradigmatic Negro spiritual" because it expresses the joy felt at being delivered from slavery and worldly miseries. Anthony Heilbut, author of The Gospel Sound, states that the "dangers, toils, and snares" of Newton's words are a "universal testimony" of the African American experience. During the civil rights movement and opposition to the Vietnam War, the song took on a political tone. Mahalia Jackson employed "Amazing Grace" for Civil Rights marchers, writing that she used it "to give magical protection a charm to ward off danger, an incantation to the angels of heaven to descend ... I was not sure the magic worked outside the church walls ... in the open air of Mississippi. But I wasn't taking any chances." Folk singer Judy Collins, who knew the song before she could remember learning it, witnessed Fannie Lou Hamer leading marchers in Mississippi in 1964, singing "Amazing Grace". Collins also considered it a talisman of sorts, and saw its equal emotional impact on the marchers, witnesses, and law enforcement who opposed the civil rights demonstrators. According to fellow folk singer Joan Baez, it was one of the most requested songs from her audiences, but she never realised its origin as a hymn; by the time she was singing it in the 1960s she said it had "developed a life of its own". It even made an appearance at the Woodstock Music Festival in 1969 during Arlo Guthrie's performance. Collins decided to record it in the late 1960s amid an atmosphere of counterculture introspection; she was part of an encounter group that ended a contentious meeting by singing "Amazing Grace" as it was the only song to which all the members knew the words. Her producer was present and suggested she include a version of it on her 1970 album Whales & Nightingales. Collins, who had a history of alcohol abuse, claimed that the song was able to "pull her through" to recovery. It was recorded in St. Paul's, the chapel at Columbia University, chosen for the acoustics. She chose an a cappella arrangement that was close to Edwin Othello Excell's, accompanied by a chorus of amateur singers who were friends of hers. Collins connected it to the Vietnam War, to which she objected: "I didn't know what else to do about the war in Vietnam. I had marched, I had voted, I had gone to jail on political actions and worked for the candidates I believed in. The war was still raging. There was nothing left to do, I thought ... but sing 'Amazing Grace'." Gradually and unexpectedly, the song began to be played on the radio, and then be requested. It rose to number 15 on the Billboard Hot 100, remaining on the charts for 15 weeks, as if, she wrote, her fans had been "waiting to embrace it". In the UK, it charted 8 times between 1970 and 1972, peaking at number 5 and spending a total of 75 weeks on popular music charts. Her rendition also reached number 5 in New Zealand and number 12 in Ireland in 1971. In 1972, the Royal Scots Dragoon Guards, the senior Scottish regiment of the British Army, recorded an instrumental version featuring a bagpipe soloist accompanied by a pipe band. The tempo of their arrangement was slowed to allow for the bagpipes, but it was based on Collins's: it began with a bagpipe solo introduction similar to her lone voice, then it was accompanied by the band of bagpipes and horns, whereas in her version she is backed up by a chorus. It became an international hit, spending five weeks at number-one in the UK Singles Chart, topping the RPM national singles chart in Canada for three weeks, and also peaking at number 11 on the Billboard Hot 100 in the US. It is also a controversial instrumental, as it combined pipes with a military band. The Pipe Major of the Royal Scots Dragoon Guards was summoned to Edinburgh Castle and chastised for demeaning the bagpipes. Aretha Franklin and Rod Stewart also recorded "Amazing Grace" around the same time, and both of their renditions were popular. All four versions were marketed to distinct types of audiences, thereby assuring its place as a pop song. Johnny Cash recorded it on his 1975 album Sings Precious Memories, dedicating it to his older brother Jack, who had been killed in a mill accident when they were boys in Dyess, Arkansas. Cash and his family sang it to themselves while they worked in the cotton fields following Jack's death. Cash often included the song when he toured prisons, saying "For the three minutes that song is going on, everybody is free. It just frees the spirit and frees the person." The U.S. Library of Congress has a collection of 3,000 versions of and songs inspired by "Amazing Grace", some of which were first-time recordings by folklorists Alan and John Lomax, a father and son team who in 1932 travelled thousands of miles across the southern states of the US to capture the different regional styles of the song. More contemporary renditions include samples from such popular artists as Sam Cooke and the Soul Stirrers (1963), the Byrds (1970), Elvis Presley (1971), Skeeter Davis (1972), Mighty Clouds of Joy (1972), Amazing Rhythm Aces (1975), Willie Nelson (1976) and the Lemonheads (1992). In American popular culture "Amazing Grace" is an icon in American culture that has been used for a variety of secular purposes and marketing campaigns. It is referenced in the 2006 film Amazing Grace, which highlights Newton's influence on the leading British abolitionist William Wilberforce, in the film biography of Newton, Newton's Grace, and the 2014 film Freedom which tells the story of Newton's composition of the hymn. Since 1954, when an organ instrumental of "New Britain" became a best-seller, "Amazing Grace" has been associated with funerals and memorial services. The hymn has become a song that inspires hope in the wake of tragedy, becoming a sort of "spiritual national anthem" according to authors Mary Rourke and Emily Gwathmey. For example, President Barack Obama recited and later sang the hymn at the memorial service for Clementa Pinckney, who was one of the nine victims of the Charleston church shooting in 2015. Modern interpretations In recent years, the words of the hymn have been changed in some religious publications to downplay a sense of imposed self-loathing by its singers. The second line, "That saved a wretch like me!" has been rewritten as "That saved and strengthened me", "save a soul like me", or "that saved and set me free". Kathleen Norris in her book Amazing Grace: A Vocabulary of Faith characterises this transformation of the original words as "wretched English" making the line that replaces the original "laughably bland". Part of the reason for this change has been the altered interpretations of what wretchedness and grace means. Newton's Calvinistic view of redemption and divine grace formed his perspective that he considered himself a sinner so vile that he was unable to change his life or be redeemed without God's help. Yet his lyrical subtlety, in Steve Turner's opinion, leaves the hymn's meaning open to a variety of Christian and non-Christian interpretations. "Wretch" also represents a period in Newton's life when he saw himself outcast and miserable, as he was when he was enslaved in Sierra Leone; his own arrogance was matched by how far he had fallen in his life. Due to its immense popularity and iconic nature, the meaning behind the words of "Amazing Grace" has become as individual as the singer or listener. Bruce Hindmarsh suggests that the secular popularity of "Amazing Grace" is due to the absence of any mention of God in the lyrics until the fourth verse (by Excell's version, the fourth verse begins "When we've been there ten thousand years"), and that the song represents the ability of humanity to transform itself instead of a transformation taking place at the hands of God. "Grace", however, had a clearer meaning to John Newton, as he used the word to represent God or the power of God. The transformative power of the song was investigated by journalist Bill Moyers in a documentary released in 1990. Moyers was inspired to focus on the song's power after watching a performance at Lincoln Center, where the audience consisted of Christians and non-Christians, and he noticed that it had an equal impact on everybody in attendance, unifying them. James Basker also acknowledged this force when he explained why he chose "Amazing Grace" to represent a collection of anti-slavery poetry: "there is a transformative power that is applicable ... : the transformation of sin and sorrow into grace, of suffering into beauty, of alienation into empathy and connection, of the unspeakable into imaginative literature." Moyers interviewed Collins, Cash, opera singer Jessye Norman, Appalachian folk musician Jean Ritchie and her family, white Sacred Harp singers in Georgia, black Sacred Harp singers in Alabama, and a prison choir at the Texas State Penitentiary at Huntsville. Collins, Cash, and Norman were unable to discern if the power of the song came from the music or the lyrics. Norman, who once notably sang it at the end of a large outdoor rock concert for Nelson Mandela's 70th birthday, stated, "I don't know whether it's the text I don't know whether we're talking about the lyrics when we say that it touches so many people or whether it's that tune that everybody knows." A prisoner interviewed by Moyers explained his literal interpretation of the second verse: "'Twas grace that taught my heart to fear, and grace my fears relieved" by saying that the fear became immediately real to him when he realised he may never get his life in order, compounded by the loneliness and restriction in prison. Gospel singer Marion Williams summed up its effect: "That's a song that gets to everybody". The Dictionary of American Hymnology claims it is included in more than a thousand published hymnals, and recommends its use for "occasions of worship when we need to confess with joy that we are saved by God's grace alone; as a hymn of response to forgiveness of sin or as an assurance of pardon; as a confession of faith or after the sermon". Notes References Citations Sources Aitken, Jonathan (2007). John Newton: From Disgrace to Amazing Grace, Crossway Books. Basker, James (2002). Amazing Grace: An Anthology of Poems About Slavery, 1660–1810, Yale University Press. Benson, Louis (1915). The English Hymn: Its Development and Use in Worship, The Presbyterian Board of Publication, Philadelphia. Bradley, Ian (ed.)(1989). The Book of Hymns, The Overlook Press. Brown, Tony; Kutner, Jon; Warwick, Neil (2000). Complete Book of the British Charts: Singles & Albums, Omnibus. Bruner, Kurt; Ware, Jim (2007). Finding God in the Story of Amazing Grace, Tyndale House Publishers, Inc. Chase, Gilbert (1987). America's Music, From the Pilgrims to the Present, McGraw-Hill. Collins, Judy (1998). Singing Lessons: A Memoir of Love, Loss, Hope, and Healing , Pocket Books. Duvall, Deborah (2000). Tahlequah and the Cherokee Nation, Arcadia Publishing. Julian, John (ed.)(1892). A Dictionary of Hymnology, Charles Scribner's Sons, New York. Martin, Bernard (1950). John Newton: A Biography, William Heineman, Ltd., London. Martin, Bernard and Spurrell, Mark, (eds.)(1962). The Journal of a Slave Trader (John Newton), The Epworth Press, London. Newton, John (1811). Thoughts Upon the African Slave Trade, Samuel Whiting and Co., London. Newton, John (1824). The Works of the Rev. John Newton Late Rector of the United Parishes of St. Mary Woolnoth and St. Mary Woolchurch Haw, London: Volume 1, Nathan Whiting, London. Noll, Mark A.; Blumhofer, Edith L. (eds.) (2006). Sing Them Over Again to Me: Hymns and Hymnbooks in America, University of Alabama Press. Norris, Kathleen (1999). Amazing Grace: A Vocabulary of Faith, Riverhead. Patterson, Beverly Bush (1995). The Sound of the Dove: Singing in Appalachian Primitive Baptist Churches, University of Illinois Press. Porter, Jennifer; McLaren, Darcee (eds.)(1999). Star Trek and Sacred Ground: Explorations of Star Trek, Religion, and American Culture, State University of New York Press, Rourke, Mary; Gwathmey, Emily (1996). Amazing Grace in America: Our Spiritual National Anthem, Angel City Press. Stowe, Harriet Beecher (1899). Uncle Tom's Cabin, or Life Among the Lowly, R. F. Fenno & Company, New York City. Swiderski, Richard (1996). The Metamorphosis of English: Versions of Other Languages, Greenwood Publishing Group. Turner, Steve (2002). Amazing Grace: The Story of America's Most Beloved Song, HarperCollins. Watson, J. R. (ed.)(2002). An Annotated Anthology of Hymns, Oxford University Press. Whitburn, Joel (2003). Joel Whitburn's Top Pop Singles, 1955–2002, Record Research, Inc. External links Amazing Grace at Hymnary.org The Amazing Grace U.S. Library of Congress Amazing Grace collection Cowper & Newton Museum in Olney, England Amazing Grace: Some Early Tunes Anthology of the American Hymn-Tune Repertory Amazing Grace: The story behind the song and its connection to Lough Swilly 1772 songs 18th-century hymns 1970 singles 1971 singles 1972 singles 2007 singles Elvis Presley songs English Christian hymns English patriotic songs Funerary and memorial compositions Gospel songs Hymns by John Newton Irish Singles Chart number-one singles Joan Baez songs Number-one singles in Australia Number-one singles in South Africa Okeh Records singles RPM Top Singles number-one singles UK Singles Chart number-one singles United States National Recording Registry recordings

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https://en.wikipedia.org/wiki/AOL

AOL

AOL (stylized as Aol., formerly a company known as AOL Inc. and originally known as America Online) is an American web portal and online service provider based in New York City. It is a brand marketed by the current incarnation of Yahoo! Inc. The service traces its history to an online service known as PlayNET. PlayNET licensed its software to Quantum Link (Q-Link), that went online in November 1985. A new IBM PC client was launched in 1988, and eventually renamed as America Online in 1989. AOL grew to become the largest online service, displacing established players like CompuServe and The Source. By 1995, AOL had about three million active users. AOL was one of the early pioneers of the Internet in the early-1990s, and the most recognized brand on the web in the United States. It originally provided a dial-up service to millions of Americans, pioneered instant messaging, and in 1993 began adding internet access. In 1998, AOL purchased Netscape for US$4.2 billion. In 2001, at the height of its popularity, it purchased the media conglomerate Time Warner in the largest merger in U.S. history. AOL rapidly shrank thereafter, partly due to the decline of dial-up and rise of broadband. AOL was eventually spun off from Time Warner in 2009, with Tim Armstrong appointed the new CEO. Under his leadership, the company invested in media brands and advertising technologies. On June 23, 2015, AOL was acquired by Verizon Communications for $4.4 billion. On May 3, 2021, Verizon announced it would sell Yahoo and AOL to private equity firm Apollo Global Management for $5 billion. On September 1, 2021, AOL became part of the new Yahoo! Inc. History 1983–1991: early years AOL began in 1983, as a short-lived venture called Control Video Corporation (CVC), founded by William von Meister. Its sole product was an online service called GameLine for the Atari 2600 video game console, after von Meister's idea of buying music on demand was rejected by Warner Bros. Subscribers bought a modem from the company for $49.95 and paid a one-time $15 setup fee. GameLine permitted subscribers to temporarily download games and keep track of high scores, at a cost of $1 per game. The telephone disconnected and the downloaded game would remain in GameLine's Master Module and playable until the user turned off the console or downloaded another game. In January 1983, Steve Case was hired as a marketing consultant for Control Video on the recommendation of his brother, investment banker Dan Case. In May 1983, Jim Kimsey became a manufacturing consultant for Control Video, which was near bankruptcy. Kimsey was brought in by his West Point friend Frank Caufield, an investor in the company. In early 1985, von Meister left the company. On May 24, 1985, Quantum Computer Services, an online services company, was founded by Kimsey from the remnants of Control Video, with Kimsey as chief executive officer, and Marc Seriff as chief technology officer. The technical team consisted of Seriff, Tom Ralston, Ray Heinrich, Steve Trus, Ken Huntsman, Janet Hunter, Dave Brown, Craig Dykstra, Doug Coward, and Mike Ficco. In 1987, Case was promoted again to executive vice-president. Kimsey soon began to groom Case to take over the role of CEO, which he did when Kimsey retired in 1991. Kimsey changed the company's strategy, and in 1985, launched a dedicated online service for Commodore 64 and 128 computers, originally called Quantum Link ("Q-Link" for short). The Quantum Link software was based on software licensed from PlayNet, Inc, (founded in 1983 by Howard Goldberg and Dave Panzl). The service was different from other online services as it used the computing power of the Commodore 64 and the Apple II rather than just a "dumb" terminal. It passed tokens back and forth and provided a fixed price service tailored for home users. In May 1988, Quantum and Apple launched AppleLink Personal Edition for Apple II and Macintosh computers. In August 1988, Quantum launched PC Link, a service for IBM-compatible PCs developed in a joint venture with the Tandy Corporation. After the company parted ways with Apple in October 1989, Quantum changed the service's name to America Online. Case promoted and sold AOL as the online service for people unfamiliar with computers, in contrast to CompuServe, which was well established in the technical community. From the beginning, AOL included online games in its mix of products; many classic and casual games were included in the original PlayNet software system. the company introduced many innovative online interactive titles and games, including: Graphical chat environments Habitat (1986–1988) from LucasArts. The first online interactive fiction series QuantumLink Serial by Tracy Reed (1988). Quantum Space, the first fully automated play-by-mail game (1989–1991). 1991–2006: Internet age, Time Warner merger In February 1991, AOL for DOS was launched using a GeoWorks interface; it was followed a year later by AOL for Windows. This coincided with growth in pay-based online services, like Prodigy, CompuServe, and GEnie. 1991 also saw the introduction of an original Dungeons & Dragons title called Neverwinter Nights from Stormfront Studios; which was one of the first Multiplayer Online Role Playing Games to depict the adventure with graphics instead of text. During the early 1990s, the average subscription lasted for about 25 months and accounted for $350 in total revenue. Advertisements invited modem owners to "Try America Online FREE", promising free software and trial membership. AOL discontinued Q-Link and PC Link in late 1994. In September 1993, AOL added Usenet access to its features. This is commonly referred to as the "Eternal September", as Usenet's cycle of new users was previously dominated by smaller numbers of college and university freshmen gaining access in September and taking a few weeks to acclimate. This also coincided with a new "carpet bombing" marketing campaign by CMO Jan Brandt to distribute as many free trial AOL trial disks as possible through nonconventional distribution partners. At one point, 50% of the CDs produced worldwide had an AOL logo. AOL quickly surpassed GEnie, and by the mid-1990s, it passed Prodigy (which for several years allowed AOL advertising) and CompuServe. In November 1994, AOL purchased Booklink for its web browser, to give its users web access. In 1996, AOL replaced Booklink with a browser based on Internet Explorer, allegedly in exchange for inclusion of AOL in Windows. AOL launched services with the National Education Association, the American Federation of Teachers, National Geographic, the Smithsonian Institution, the Library of Congress, Pearson, Scholastic, ASCD, NSBA, NCTE, Discovery Networks, Turner Education Services (CNN Newsroom), NPR, The Princeton Review, Stanley Kaplan, Barron's, Highlights for Kids, the U.S. Department of Education, and many other education providers. AOL offered the first real-time homework help service (the Teacher Pager—1990; prior to this, AOL provided homework help bulletin boards), the first service by children, for children (Kids Only Online, 1991), the first online service for parents (the Parents Information Network, 1991), the first online courses (1988), the first omnibus service for teachers (the Teachers' Information Network, 1990), the first online exhibit (Library of Congress, 1991), the first parental controls, and many other online education firsts. AOL purchased search engine WebCrawler in 1995, but sold it to Excite the following year; the deal made Excite the sole search and directory service on AOL. After the deal closed in March 1997, AOL launched its own branded search engine, based on Excite, called NetFind. This was renamed to AOL Search in 1999. AOL charged its users an hourly fee until December 1996, when the company changed to a flat monthly rate of $19.95. During this time, AOL connections were flooded with users trying to connect, and many canceled their accounts due to constant busy signals. A commercial was made featuring Steve Case telling people AOL was working day and night to fix the problem. Within three years, AOL's user base grew to 10 million people. In 1995, AOL was headquartered at 8619 Westwood Center Drive in the Tysons Corner CDP in unincorporated Fairfax County, Virginia, near the Town of Vienna. AOL was quickly running out of room in October 1996 for its network at the Fairfax County campus. In mid-1996, AOL moved to 22000 AOL Way in Dulles, unincorporated Loudoun County, Virginia to provide room for future growth. In a five-year landmark agreement with the most popular operating system, AOL was bundled with Windows software. On March 31, 1996, the short-lived eWorld was purchased by AOL. In 1997, about half of all U.S. homes with Internet access had it through AOL. During this time, AOL's content channels, under Jason Seiken, including News, Sports, and Entertainment, experienced their greatest growth as AOL become the dominant online service internationally with more than 34 million subscribers. In November 1998, AOL announced it would acquire Netscape, best known for their web browser, in a major $4.2 billion deal. The deal closed on March 17, 1999. Another large acquisition in December 1999 was that of MapQuest, for $1.1 billion. In January 2000, as new broadband technologies were being rolled out around the New York City metropolitan area and elsewhere across the U.S., AOL and Time Warner announced plans to merge, forming AOL Time Warner, Inc. The terms of the deal called for AOL shareholders to own 55% of the new, combined company. The deal closed on January 11, 2001. The new company was led by executives from AOL, SBI, and Time Warner. Gerald Levin, who had served as CEO of Time Warner, was CEO of the new company. Steve Case served as chairman, J. Michael Kelly (from AOL) was the chief financial officer, Robert W. Pittman (from AOL) and Dick Parsons (from Time Warner) served as co-chief operating officers. In 2002, Jonathan Miller became CEO of AOL. The following year, AOL Time Warner dropped the "AOL" from its name. It was the largest merger in history when completed with the combined value of the companies at $360 billion. This value fell sharply, to as low as $120 billion, as markets repriced AOL's valuation as a pure internet firm more modestly when combined with the traditional media and cable business. This status did not last long, and the company's value rose again within three months. By the end of that year, the tide had turned against "pure" internet companies, with many collapsing under falling stock prices, and even the strongest companies in the field losing up to 75% of their market value. The decline continued though 2001, but even with the losses, AOL was among the internet giants that continued to outperform brick and mortar companies. In 2004, along with the launch of AOL 9.0 Optimized, AOL also made available the option of personalized greetings which would enable the user to hear his or her name while accessing basic functions and mail alerts, or while logging in or out. In 2005, AOL broadcast the Live 8 concert live over the Internet, and thousands of users downloaded clips of the concert over the following months. In late 2005, AOL released AOL Safety & Security Center, a bundle of McAfee Antivirus, CA anti-spyware, and proprietary firewall and phishing protection software. News reports in late 2005 identified companies such as Yahoo!, Microsoft, and Google as candidates for turning AOL into a joint venture. Those plans were abandoned when it was revealed on December 20, 2005, that Google would purchase a 5% share of AOL for $1 billion. 2006–2009: rebranding and decline On April 3, 2006, AOL announced that it would retire the full name America Online. The official name of the service became AOL, and the full name of the Time Warner subdivision became AOL LLC. On June 8, 2006, AOL offered a new program called AOL Active Security Monitor, a diagnostic tool to monitor and rate PC security status, and recommended additional security software from AOL or Download.com. Two months later, AOL released AOL Active Virus Shield, a free product developed by Kaspersky Lab, that did not require an AOL account, only an internet email address. The ISP side of AOL UK was bought by Carphone Warehouse in October 2006 to take advantage of its 100,000 LLU customers, making Carphone Warehouse the largest LLU provider in the UK. In August 2006, AOL announced that it would offer email accounts and software previously available only to its paying customers, provided that users accessed AOL or AOL.com through an access method not owned by AOL (otherwise known as "third party transit", "bring your own access" or "BYOA"). The move was designed to reduce costs associated with the "walled garden" business model by reducing usage of AOL-owned access points and shifting members with high-speed internet access from client-based usage to the more lucrative advertising provider AOL.com. The change from paid to free access was also designed to slow the rate at which members canceled their accounts and defected to Microsoft Hotmail, Yahoo! or other free email providers. The other free services included: AIM (AOL Instant Messenger) AOL Video, which featured professional content and allowed users to upload videos. AOL Local, comprising its CityGuide, Yellow Pages and Local Search services to help users find local information like restaurants, local events, and directory listings. AOL News AOL My eAddress, a custom domain name for email addresses. These email accounts could be accessed in a manner similar to those of other AOL and AIM email accounts. Xdrive, which allowed users to back up files over the Internet. It was acquired by AOL on August 4, 2005, and closed on December 31, 2008. It offered a free 5 GB account (free online file storage) to anyone with an AOL screenname. Xdrive also provided remote backup services and 50 GB of storage for $9.95 per month. Also in August, AOL informed its U.S. customers of an increase in the price of its dial-up access to $25.90. The increase was part of an effort to migrate the service's remaining dial-up users to broadband, as the increased price was the same as that of its monthly DSL access. However, AOL subsequently began offering unlimited dial-up access for $9.95 a month. On November 16, 2006, Randy Falco succeeded Jonathan Miller as CEO. In December 2006, AOL closed its last remaining call center in the United States, "taking the America out of America Online," according to industry pundits. Service centers based in India and the Philippines continue to provide customer support and technical assistance to subscribers. On September 17, 2007, AOL announced the relocation of one of its corporate headquarters from Dulles, Virginia to New York City and the combination of its advertising units into a new subsidiary called Platform A. This action followed several advertising acquisitions, most notably Advertising.com, and highlighted the company's new focus on advertising-driven business models. AOL management stressed that "significant operations" would remain in Dulles, which included the company's access services and modem banks. In October 2007, AOL announced the relocation of its other headquarters from Loudoun County, Virginia to New York City, while continuing to operate its Virginia offices. As part of the move to New York and the restructuring of responsibilities at the Dulles headquarters complex after the Reston move, Falco announced on October 15, 2007, plans to lay off 2,000 employees worldwide by the end of 2007, beginning "immediately." The result was a layoff of approximately 40% of AOL's employees. Most compensation packages associated with the October 2007 layoffs included a minimum of 120 days of severance pay, 60 of which were offered in lieu of the 60-day advance notice requirement by provisions of the 1988 federal WARN Act. By November 2007, AOL's customer base had been reduced to 10.1 million subscribers, slightly more than the number of subscribers of Comcast and AT&T Yahoo!. According to Falco, as of December 2007, the conversion rate of accounts from paid access to free access was more than 80%. On January 3, 2008, AOL announced the closing of its Reston, Virginia data center, which was sold to CRG West. On February 6, Time Warner CEO Jeff Bewkes announced that Time Warner would divide AOL's internet-access and advertising businesses, with the possibility of later selling the internet-access division. On March 13, 2008, AOL purchased the social networking site Bebo for $850 million (£417 million). On July 25, AOL announced that it was shuttering Xdrive, AOL Pictures and BlueString to save on costs and focus on its core advertising business. AOL Pictures was closed on December 31. On October 31, AOL Hometown (a web-hosting service for the websites of AOL customers) and the AOL Journal blog hosting service were eliminated. 2009–2015: As a digital media company On March 12, 2009, Tim Armstrong, formerly with Google, was named chairman and CEO of AOL. On May 28, Time Warner announced that it would position AOL as an independent company after Google's shares ceased at the end of the fiscal year. On November 23, AOL unveiled a new brand identity with the wordmark "Aol." superimposed onto canvases created by commissioned artists. The new identity, designed by Wolff Olins, was integrated with all of AOL's services on December 10, the date upon which AOL traded independently for the first time since the Time Warner merger on the New York Stock Exchange under the symbol AOL. On April 6, 2010, AOL announced plans to shutter or sell Bebo. On June 16, the property was sold to Criterion Capital Partners for an undisclosed amount, believed to be approximately $10 million. In December, AIM eliminated access to AOL chat rooms, noting a marked decline in usage in recent months. Under Armstrong's leadership, AOL followed a new business direction marked by a series of acquisitions. It announced the acquisition of Patch Media, a network of community-specific news and information sites focused on towns and communities. On September 28, 2010, at the San Francisco TechCrunch Disrupt Conference, AOL signed an agreement to acquire TechCrunch. On December 12, 2010, AOL acquired about.me, a personal profile and identity platform, four days after the platform's public launch. On January 31, 2011, AOL announced the acquisition of European video distribution network goviral. In March 2011, AOL acquired HuffPost for $315 million. Shortly after the acquisition was announced, Huffington Post co-founder Arianna Huffington replaced AOL content chief David Eun, assuming the role of president and editor-in-chief of the AOL Huffington Post Media Group. On March 10, AOL announced that it would cut approximately 900 workers following the HuffPost acquisition. On September 14, 2011, AOL formed a strategic ad-selling partnership with two of its largest competitors, Yahoo and Microsoft. The three companies would begin selling inventory on each others' sites. The strategy was designed to help the companies compete with Google and advertising networks. On February 28, 2012, AOL partnered with PBS to launch MAKERS, a digital documentary series focusing on high-achieving women in industries perceived as male-dominated such as war, comedy, space, business, Hollywood and politics. Subjects for MAKERS episodes have included Oprah Winfrey, Hillary Clinton, Sheryl Sandberg, Martha Stewart, Indra Nooyi, Lena Dunham and Ellen DeGeneres. On March 15, 2012, AOL announced the acquisition of Hipster, a mobile photo-sharing app, for an undisclosed amount. On April 9, 2012, AOL announced a deal to sell 800 patents to Microsoft for $1.056 billion. The deal included a perpetual license for AOL to use the patents. In April, AOL took several steps to expand its ability to generate revenue through online video advertising. The company announced that it would offer gross rating point (GRP) guarantee for online video, mirroring the television-ratings system and guaranteeing audience delivery for online-video advertising campaigns bought across its properties. This announcement came just days before the Digital Content NewFront (DCNF) a two-week event held by AOL, Google, Hulu, Microsoft, Vevo and Yahoo to showcase the participating sites' digital video offerings. The DCNF was conducted in advance of the traditional television upfronts in the hope of diverting more advertising money into the digital space. On April 24, the company launched the AOL On network, a single website for its video output. In February 2013, AOL reported its fourth quarter revenue of $599.5 million, its first growth in quarterly revenue in eight years. In August 2013, Armstrong announced that Patch Media would scale back or sell hundreds of its local news sites. Not long afterward, layoffs began, with up to 500 out of 1,100 positions initially impacted. On January 15, 2014, Patch Media was spun off, and majority ownership was held by Hale Global. By the end of 2014, AOL controlled 0.74% of the global advertising market, well behind industry leader Google's 31.4%. On January 23, 2014, AOL acquired Gravity, a software startup that tracked users' online behavior and tailored ads and content based on their interests, for $83 million. The deal, which included approximately 40 Gravity employees and the company's personalization technology, was Armstrong's fourth-largest deal since taking command in 2009. Later that year, AOL acquired Vidible, a company that developed technology to help websites run video content from other publishers, and help video publishers sell their content to these websites. The deal, which was announced December 1, 2014, was reportedly worth roughly $50 million. On July 16, 2014, AOL earned an Emmy nomination for the AOL original series The Future Starts Here in the News and Documentary category. This came days after AOL earned its first Primetime Emmy Award nomination and win for Park Bench with Steve Buscemi in the Outstanding Short Form Variety Series. Created and hosted by Tiffany Shlain, the series focused on humans' relationship with technology and featured episodes such as "The Future of Our Species," "Why We Love Robots" and "A Case for Optimism." 2015–2021: division of Verizon On May 12, 2015, Verizon announced plans to buy AOL for $50 per share in a deal valued at $4.4 billion. The transaction was completed on June 23. Armstrong, who continued to lead the firm following regulatory approval, called the deal the logical next step for AOL. "If you look forward five years, you're going to be in a space where there are going to be massive, global-scale networks, and there's no better partner for us to go forward with than Verizon." he said. "It's really not about selling the company today. It's about setting up for the next five to 10 years." Analyst David Bank said he thought the deal made sense for Verizon. The deal will broaden Verizon's advertising sales platforms and increase its video production ability through websites such as HuffPost, TechCrunch, and Engadget. However, Craig Moffett said it was unlikely the deal would make a big difference to Verizon's bottom line. AOL had about two million dial-up subscribers at the time of the buyout. The announcement caused AOL's stock price to rise 17%, while Verizon's stock price dropped slightly. Shortly before the Verizon purchase, on April 14, 2015, AOL launched ONE by AOL, a digital marketing programmatic platform that unifies buying channels and audience management platforms to track and optimize campaigns over multiple screens. Later that year, on September 15, AOL expanded the product with ONE by AOL: Creative, which is geared towards creative and media agencies to similarly connect marketing and ad distribution efforts. On May 8, 2015, AOL reported its first-quarter revenue of $625.1 million, $483.5 million of which came from advertising and related operations, marking a 7% increase from Q1 2014. Over that year, the AOL Platforms division saw a 21% increase in revenue, but a drop in adjusted OIBDA due to increased investments in the company's video and programmatic platforms. On June 29, 2015, AOL announced a deal with Microsoft to take over the majority of its digital advertising business. Under the pact, as many as 1,200 Microsoft employees involved with the business will be transferred to AOL, and the company will take over the sale of display, video, and mobile ads on various Microsoft platforms in nine countries, including Brazil, Canada, the United States, and the United Kingdom. Additionally, Google Search will be replaced on AOL properties with Bing—which will display advertising sold by Microsoft. Both advertising deals are subject to affiliate marketing revenue sharing. On July 22, 2015, AOL received two News and Documentary Emmy nominations, one for MAKERS in the Outstanding Historical Programming category, and the other for True Trans With Laura Jane Grace, which documented the story of Laura Jane Grace, a transgender musician best known as the founder, lead singer, songwriter and guitarist of the punk rock band Against Me!, and her decision to come out publicly and overall transition experience. On September 3, 2015, AOL agreed to buy Millennial Media for $238 million. On October 23, 2015, AOL completed the acquisition. On October 1, 2015, Go90, a free ad-supported mobile video service aimed at young adult and teen viewers that Verizon owns and AOL oversees and operates launched its content publicly after months of beta testing. The initial launch line-up included content from Comedy Central, HuffPost, Nerdist News, Univision News, Vice, ESPN and MTV. On April 20, 2016, AOL acquired virtual reality studio RYOT to bring immersive 360 degree video and VR content to HuffPost's global audience across desktop, mobile, and apps. In July 2016, Verizon Communications announced its intent to purchase the core internet business of Yahoo!. Verizon merged AOL with Yahoo into a new company called "Oath Inc.", which in January 2019 rebranded itself as Verizon Media. In April 2018, Oath Inc. sold Moviefone to MoviePass Parent Helios and Matheson Analytics. In November 2020 the Huffington Post was sold to BuzzFeed in a stock deal. 2021–present: Apollo Global Management On May 3, 2021, Verizon announced it would sell 90 percent of its Verizon Media division to Apollo Global Management for $5 billion. The division became the second incarnation of Yahoo! Inc. Products and services Content As of September 1, 2021, the following media brands became subsidiary of AOL's parent Yahoo Inc. Engadget Autoblog TechCrunch Built by Girls AOL's content contributors consists of over 20,000 bloggers, including politicians, celebrities, academics, and policy experts, who contribute on a wide range of topics making news. In addition to mobile-optimized web experiences, AOL produces mobile applications for existing AOL properties like Autoblog, Engadget, The Huffington Post, TechCrunch, and products such as Alto, Pip, and Vivv. Advertising AOL has a global portfolio of media brands and advertising services across mobile, desktop, and TV. Services include brand integration and sponsorships through its in-house branded content arm, Partner Studio by AOL, as well as data and programmatic offerings through ad technology stack, ONE by AOL. AOL acquired a number of businesses and technologies help to form ONE by AOL. These acquisitions included AdapTV in 2013 and Convertro, Precision Demand, and Vidible in 2014. ONE by AOL is further broken down into ONE by AOL for Publishers (formerly Vidible, AOL On Network and Be On for Publishers) and ONE by AOL for Advertisers, each of which have several sub-platforms. On September 10, 2018, AOL's parent company Oath consolidated BrightRoll, One by AOL and Yahoo Gemini to 'simplify' adtech service by launching a single advertising proposition dubbed Oath Ad Platforms, now Yahoo! Ad Tech. Membership AOL offers a range of integrated products and properties including communication tools, mobile apps and services and subscription packages. In 2017, before the discontinuation of AIM, "billions of messages" were sent "daily" on it and AOL's other chat services. Dial-up Internet access – While 2.1 million people still used AOL's dial-up service as recently as 2015, only a few thousand were still subscribed as of 2021. AOL Mail – AOL Mail is AOL's proprietary email client. It is fully integrated with AIM and links to news headlines on AOL content sites. AOL Instant Messenger (AIM) – was AOL's proprietary instant-messaging tool. It was released in 1997. It lost market share to competition in the instant messenger market such as Google Chat, Facebook Messenger, and Skype. It also included a video-chat service, AV by AIM. On December 15, 2017, AOL discontinued AIM. AOL Plans – AOL Plans offers three online safety and assistance tools: ID protection, data security and a general online technical assistance service. AOL Desktop AOL Desktop is an internet suite produced by AOL from 2007 that integrates a web browser, a media player and an instant messenger client. Version 10.X was based on AOL OpenRide, it is an upgrade from such. The macOS version is based on WebKit. AOL Desktop version 10.X was different from previous AOL browsers and AOL Desktop versions. Its features are focused on web browsing as well as email. For instance, one does not have to sign into AOL in order to use it as a regular browser. In addition, non-AOL email accounts can be accessed through it. Primary buttons include "MAIL", "IM", and several shortcuts to various web pages. The first two require users to sign in, but the shortcuts to web pages can be used without authentication. AOL Desktop version 10.X was late marked as unsupported in favor of supporting the AOL Desktop 9.X versions. Version 9.8 was released, replacing the Internet Explorer components of the internet browser with CEF (Chromium Embedded Framework) to give users an improved web browsing experience closer to that of Chrome. Version 11 of AOL Desktop, was a total rewrite but maintained a similar user interface to the previous 9.8.X series of releases. In 2017, a new paid version called AOL Desktop Gold was released, available for $4.99 per month after trial. It replaced the previous free version. After the shutdown of AIM in 2017, AOL's original chat rooms continued to be accessible through AOL Desktop Gold, and some rooms remained active during peak hours. That chat system was shut down on December 15, 2020. In addition to AOL Desktop, the company also offered a browser toolbar Mozilla plug-in, AOL Toolbar, for several web browsers that provided quick access to AOL services. The toolbar was available from 2007 until 2018. Criticism In its earlier incarnation as a "walled garden" community and service provider, AOL received criticism for its community policies, terms of service, and customer service. Prior to 2006, AOL was known for its direct mailing of CD-ROMs and 3.5-inch floppy disks containing its software. The disks were distributed in large numbers; at one point, half of the CDs manufactured worldwide had AOL logos on them. The marketing tactic was criticized for its environmental cost, and AOL CDs were recognized as PC Worlds most annoying tech product. Community leaders AOL used a system of volunteers to moderate its chat rooms, forums and user communities. The program dated back to AOL's early days, when it charged by the hour for access and one of its highest billing services was chat. AOL provided free access to community leaders in exchange for moderating the chat rooms, and this effectively made chat very cheap to operate, and more lucrative than AOL's other services of the era. There were 33,000 community leaders in 1996. All community leaders received hours of training and underwent a probationary period. While most community leaders moderated chat rooms, some ran AOL communities and controlled their layout and design, with as much as 90% of AOL's content being created or overseen by community managers until 1996. By 1996, ISPs were beginning to charge flat rates for unlimited access, which they could do at a profit because they only provided internet access. Even though AOL would lose money with such a pricing scheme, it was forced by market conditions to offer unlimited access in October 1996. In order to return to profitability, AOL rapidly shifted its focus from content creation to advertising, resulting in less of a need to carefully moderate every forum and chat room to keep users willing to pay by the minute to remain connected. After unlimited access, AOL considered scrapping the program entirely, but continued it with a reduced number of community leaders, with scaled-back roles in creating content. Although community leaders continued to receive free access, after 1996 they were motivated more by the prestige of the position and the access to moderator tools and restricted areas within AOL. By 1999, there were over 15,000 volunteers in the program. In May 1999, two former volunteers filed a class-action lawsuit alleging AOL violated the Fair Labor Standards Act by treating volunteers like employees. Volunteers had to apply for the position, commit to working for at least three to four hours a week, fill out timecards and sign a non-disclosure agreement. On July 22, AOL ended its youth corps, which consisted of 350 underage community leaders. At this time, the United States Department of Labor began an investigation into the program, but it came to no conclusions about AOL's practices. AOL ended its community leader program on June 8, 2005. The class action lawsuit dragged on for years, even after AOL ended the program and AOL declined as a major internet company. In 2010, AOL finally agreed to settle the lawsuit for $15 million. The community leader program was found to be an example of co-production in a 2009 article in International Journal of Cultural Studies. Billing disputes AOL has faced a number of lawsuits over claims that it has been slow to stop billing customers after their accounts have been canceled, either by the company or the user. In addition, AOL changed its method of calculating used minutes in response to a class action lawsuit. Previously, AOL would add 15 seconds to the time a user was connected to the service and round up to the next whole minute (thus, a person who used the service for 12 minutes and 46 seconds would be charged for 14 minutes). AOL claimed this was to account for sign on/sign off time, but because this practice was not made known to its customers, the plaintiffs won (some also pointed out that signing on and off did not always take 15 seconds, especially when connecting via another ISP). AOL disclosed its connection-time calculation methods to all of its customers and credited them with extra free hours. In addition, the AOL software would notify the user of exactly how long they were connected and how many minutes they were being charged. AOL was sued by the Ohio Attorney General in October 2003 for improper billing practices. The case was settled on June 8, 2005. AOL agreed to resolve any consumer complaints filed with the Ohio AG's office. In December 2006, AOL agreed to provide restitution to Florida consumers to settle the case filed against them by the Florida Attorney General. Account cancellation Many customers complained that AOL personnel ignored their demands to cancel service and stop billing. In response to approximately 300 consumer complaints, the New York Attorney General's office began an inquiry of AOL's customer service policies. The investigation revealed that the company had an elaborate scheme for rewarding employees who purported to retain or "save" subscribers who had called to cancel their Internet service. In many instances, such retention was done against subscribers' wishes, or without their consent. Under the scheme, customer service personnel received bonuses worth tens of thousands of dollars if they could successfully dissuade or "save" half of the people who called to cancel service. For several years, AOL had instituted minimum retention or "save" percentages, which consumer representatives were expected to meet. These bonuses, and the minimum "save" rates accompanying them, had the effect of employees not honoring cancellations, or otherwise making cancellation unduly difficult for consumers. On August 24, 2005, America Online agreed to pay $1.25 million to the state of New York and reformed its customer service procedures. Under the agreement, AOL would no longer require its customer service representatives to meet a minimum quota for customer retention in order to receive a bonus. However the agreement only covered people in the state of New York. On June 13, 2006, Vincent Ferrari documented his account cancellation phone call in a blog post, stating he had switched to broadband years earlier. In the recorded phone call, the AOL representative refused to cancel the account unless the 30-year-old Ferrari explained why AOL hours were still being recorded on it. Ferrari insisted that AOL software was not even installed on the computer. When Ferrari demanded that the account be canceled regardless, the AOL representative asked to speak with Ferrari's father, for whom the account had been set up. The conversation was aired on CNBC. When CNBC reporters tried to have an account on AOL cancelled, they were hung up on immediately and it ultimately took more than 45 minutes to cancel the account. On July 19, 2006, AOL's entire retention manual was released on the Internet. On August 3, 2006, Time Warner announced that the company would be dissolving AOL's retention centers due to its profits hinging on $1 billion in cost cuts. The company estimated that it would lose more than six million subscribers over the following year. Direct marketing of disks Prior to 2006, AOL often sent unsolicited mass direct mail of 3" floppy disks and CD-ROMs containing their software. They were the most frequent user of this marketing tactic, and received criticism for the environmental cost of the campaign. According to PC World, in the 1990s "you couldn't open a magazine (PC World included) or your mailbox without an AOL disk falling out of it". The mass distribution of these disks was seen as wasteful by the public and led to protest groups. One such was No More AOL CDs, a web-based effort by two IT workers to collect one million disks with the intent to return the disks to AOL. The website was started in August 2001, and an estimated 410,176 CDs were collected by August 2007 when the project was shut down. Software In 2000, AOL was served with an $8 billion lawsuit alleging that its AOL 5.0 software caused significant difficulties for users attempting to use third-party Internet service providers. The lawsuit sought damages of up to $1000 for each user that had downloaded the software cited at the time of the lawsuit. AOL later agreed to a settlement of $15 million, without admission of wrongdoing. The AOL software then was given a feature called AOL Dialer, or AOL Connect on . This feature allowed users to connect to the ISP without running the full interface. This allowed users to use only the applications they wish to use, especially if they do not favor the AOL Browser. AOL 9.0 was once identified by Stopbadware as being under investigation for installing additional software without disclosure, and modifying browser preferences, toolbars, and icons. However, as of the release of AOL 9.0 VR (Vista Ready) on January 26, 2007, it was no longer considered badware due to changes AOL made in the software. Usenet newsgroups When AOL gave clients access to Usenet in 1993, they hid at least one newsgroup in standard list view: alt.aol-sucks. AOL did list the newsgroup in the alternative description view, but changed the description to "Flames and complaints about America Online". With AOL clients swarming Usenet newsgroups, the old, existing user base started to develop a strong distaste for both AOL and its clients, referring to the new state of affairs as Eternal September. AOL discontinued access to Usenet on June 25, 2005. No official details were provided as to the cause of decommissioning Usenet access, except providing users the suggestion to access Usenet services from a third-party, Google Groups. AOL then provided community-based message boards in lieu of Usenet. Terms of Service (TOS) AOL has a detailed set of guidelines and expectations for users on their service, known as the Terms of Service (TOS, also known as Conditions of Service, or COS in the UK). It is separated into three different sections: Member Agreement, Community Guidelines and Privacy Policy. All three agreements are presented to users at time of registration and digital acceptance is achieved when they access the AOL service. During the period when volunteer chat room hosts and board monitors were used, chat room hosts were given a brief online training session and test on Terms of Service violations. There have been many complaints over rules that govern an AOL user's conduct. Some users disagree with the TOS, citing the guidelines are too strict to follow coupled with the fact the TOS may change without users being made aware. A considerable cause for this was likely due to alleged censorship of user-generated content during the earlier years of growth for AOL. Certified email In early 2005, AOL stated its intention to implement a certified email system called Goodmail, which will allow companies to send email to users with whom they have pre-existing business relationships, with a visual indication that the email is from a trusted source and without the risk that the email messages might be blocked or stripped by spam filters. This decision drew fire from MoveOn, which characterized the program as an "email tax", and the Electronic Frontier Foundation (EFF), which characterized it as a shakedown of non-profits. A website called Dearaol.com was launched, with an online petition and a blog that garnered hundreds of signatures from people and organizations expressing their opposition to AOL's use of Goodmail. Esther Dyson defended the move in an editorial in The New York Times, saying "I hope Goodmail succeeds, and that it has lots of competition. I also think it and its competitors will eventually transform into services that more directly serve the interests of mail recipients. Instead of the fees going to Goodmail and AOL, they will also be shared with the individual recipients." Tim Lee of the Technology Liberation Front posted an article that questioned the Electronic Frontier Foundation's adopting a confrontational posture when dealing with private companies. Lee's article cited a series of discussions on Declan McCullagh's Politechbot mailing list on this subject between the EFF's Danny O'Brien and antispammer Suresh Ramasubramanian, who has also compared the EFF's tactics in opposing Goodmail to tactics used by Republican political strategist Karl Rove. SpamAssassin developer Justin Mason posted some criticism of the EFF's and Moveon's "going overboard" in their opposition to the scheme. The dearaol.com campaign lost momentum and disappeared, with the last post to the now defunct dearaol.com blog—"AOL starts the shakedown" being made on May 9, 2006. Comcast, who also used the service, announced on its website that Goodmail had ceased operations and as of February 4, 2011, they no longer used the service. Search data On August 4, 2006, AOL released a compressed text file on one of its websites containing 20 million search keywords for over 650,000 users over a 3-month period between March 1, 2006 and May 31, intended for research purposes. AOL pulled the file from public access by August 7, but not before its wide distribution on the Internet by others. Derivative research, titled A Picture of Search was published by authors Pass, Chowdhury and Torgeson for The First International Conference on Scalable Information Systems. The data were used by websites such as AOLstalker for entertainment purposes, where users of AOLstalker are encouraged to judge AOL clients based on the humorousness of personal details revealed by search behavior. User list exposure In 2003, Jason Smathers, an AOL employee, was convicted of stealing America Online's 92 million screen names and selling them to a known spammer. Smathers pled guilty to conspiracy charges in 2005. Smathers pled guilty to violations of the US CAN-SPAM Act of 2003. He was sentenced in August 2005 to 15 months in prison; the sentencing judge also recommended Smathers be forced to pay $84,000 in restitution, triple the $28,000 that he sold the addresses for. AOL's Computer Checkup "scareware" On February 27, 2012, a class action lawsuit was filed against Support.com, Inc. and partner AOL, Inc. The lawsuit alleged Support.com and AOL's Computer Checkup "scareware" (which uses software developed by Support.com) misrepresented that their software programs would identify and resolve a host of technical problems with computers, offered to perform a free "scan," which often found problems with users' computers. The companies then offered to sell software—for which AOL allegedly charged $4.99 a month and Support.com $29—to remedy those problems. Both AOL, Inc. and Support.com, Inc. settled on May 30, 2013, for $8.5 million. This included $25.00 to each valid class member and $100,000 each to Consumer Watchdog and the Electronic Frontier Foundation. Judge Jacqueline Scott Corley wrote: "Distributing a portion of the [funds] to Consumer Watchdog will meet the interests of the silent class members because the organization will use the funds to help protect consumers across the nation from being subject to the types of fraudulent and misleading conduct that is alleged here," and "EFF's mission includes a strong consumer protection component, especially in regards to online protection." AOL continues to market Computer Checkup. NSA PRISM program Following media reports about PRISM, NSA's massive electronic surveillance program, in June 2013, several technology companies were identified as participants, including AOL. According to leaks of said program, AOL joined the PRISM program in 2011. Hosting of user profiles changed, then discontinued At one time, most AOL users had an online "profile" hosted by the AOL Hometown service. When AOL Hometown was discontinued, users had to create a new profile on Bebo. This was an unsuccessful attempt to create a social network that would compete with Facebook. When the value of Bebo decreased to a tiny fraction of the $850 million AOL paid for it, users were forced to recreate their profiles yet again, on a new service called AOL Lifestream. AOL took the decision to shut down Lifestream on February 24, 2017, and gave users one month's notice to save photos and videos that had been uploaded to Lifestream. Following the shutdown, AOL no longer provides any option for hosting user profiles. During the Hometown/Bebo/Lifestream era, another user's profile could be displayed by clicking the "Buddy Info" button in the AOL Desktop software. After the shutdown of Lifestream, this was no longer supported, but opened to the AIM home page (www.aim.com), which also became defunct, redirecting to AOL's home page. See also Adrian Lamo – Inside-AOL.com AOHell Comparison of webmail providers David Shing Dot-com bubble List of acquisitions by AOL List of S&P 400 companies Live365 Truveo References External links 1983 establishments in the United States 2015 mergers and acquisitions Companies based in Dulles, Virginia Companies based in New York City Companies formerly listed on the New York Stock Exchange Companies in the PRISM network Former WarnerMedia subsidiaries Internet properties established in 1983 Internet properties established in 2009 Internet service providers of the United States Internet services supporting OpenID Pre–World Wide Web online services Telecommunications companies established in 1983 Telecommunications companies established in 2009 Yahoo! Web portals Web service providers

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https://en.wikipedia.org/wiki/AV

AV

AV, Av or A.V. may refer to: Arts and entertainment The abbreviation of audiovisual, possessing both a sound and a visual component A.V. (film), a 2005 Hong Kong film directed by Pang Ho-Cheung Adult video, an alternative name/synonym of a pornographic film AV The Hunt, a 2020 Turkish thriller film directed by Emre Akay Businesses and organizations America Votes, an American 501(c)4 organization that promotes progressive causes Ambulance Victoria, an ambulance service operated in the Australian state of Victoria Anonymous for the Voiceless, a grassroots animal rights organization specializing in street activism Aston Villa F.C., an English professional football club AV Akademikerverlag GmbH & Co. KG an imprint of the German group VDM Publishing (now OmniScriptum) Avaya, a technology company formerly listed on the New York Stock Exchange with symbol "AV" Avianca (IATA airline code AV) Aviva, British insurance company, listed on the New York Stock Exchange and London Stock Exchange as "AV" AeroVironment, manufacturer of unmanned military aircraft and systems Amusement Vision, the former name of Ryu Ga Gotoku Studio People Av or Avrum Gross (1936–2018), American lawyer and Attorney General of Alaska Av or Avrom Isaacs (1926–2016), Canadian art dealer Av Westin (1929–2022), American television producer Places Anguilla (FIPS country code and obsolete NATO diagram AV) Antelope Valley, a valley in Southern California Province of Avellino, a province of Italy Science and technology Anatomy and medicine Aerobic vaginitis, vaginal infection associated with overgrowth of aerobic bacteria Arteriovenous (disambiguation) Atrioventricular (disambiguation) Electronics and computing Access violation, a computer software error Age verification, system for checking a user's age Antivirus software, used to prevent, detect and remove malicious software Audio and video connector, a cable between two devices Analog video AV Linux, a Linux-based operating system Fluid dynamics Annular velocity, speed of the drilling fluid's movement in a column called an annulus in oil wells Apparent viscosity, shear stress divided by shear rate Vehicles AV (cyclecar), a British cyclecar manufactured between 1919 and 1924 Bavarian A V, an 1853 steam locomotive model AV, the designation for seaplane tender in the United States Navy's ship classification system Autonomous vehicles Other uses in science and technology A-type main-sequence star, in astronomy, abbreviated A V Aperture value mode, setting on photo cameras that allows to choose a specific aperture value Other uses Alternative vote, an electoral system used to elect a single winner from a field of more than two candidates Approval voting, a non-ranking vote system Authorised Version of the Bible (also known as King James Version) Av, a month in the Hebrew calendar av, the Avar language's ISO 639-1 code Av. or Ave, an abbreviation for Avenue (landscape) Ꜹ or AV from Latin aurum (avrvm), a numismatic abbreviation for "gold" A.V., the putative mark of ébéniste Adam Weisweiler Aviation, abbreviated Av in military use Andhra Vidyalaya College, aka A. V. College, a school in Hyderabad, India See also 2023 AV, an asteroid that passed closed to the Earth in 2023 A5 (disambiguation) α5 (disambiguation) AV idol, a type of Japanese porn star Masculine given names Hypocorisms

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https://en.wikipedia.org/wiki/Amine

Amine

In chemistry, amines (, ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines). Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (). The substituent is called an amino group. Compounds with a nitrogen atom attached to a carbonyl group, thus having the structure , are called amides and have different chemical properties from amines. Classification of amines Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring. Amines, alkyl and aryl alike, are organized into three subcategories (see table) based on the number of carbon atoms adjacent to the nitrogen(how many hydrogen atoms of the ammonia molecule are replaced by hydrocarbon groups): Primary (1°) amines—Primary amines arise when one of three hydrogen atoms in ammonia is replaced by an alkyl or aromatic group. Important primary alkyl amines include, methylamine, most amino acids, and the buffering agent tris, while primary aromatic amines include aniline. Secondary (2°) amines—Secondary amines have two organic substituents (alkyl, aryl or both) bound to the nitrogen together with one hydrogen. Important representatives include dimethylamine, while an example of an aromatic amine would be diphenylamine. Tertiary (3°) amines—In tertiary amines, nitrogen has three organic substituents. Examples include trimethylamine, which has a distinctively fishy smell, and EDTA. A fourth subcategory is determined by the connectivity of the substituents attached to the nitrogen: *Cyclic amines—Cyclic amines are either secondary or tertiary amines. Examples of cyclic amines include the 3-membered ring aziridine and the six-membered ring piperidine. N-methylpiperidine and N-phenylpiperidine are examples of cyclic tertiary amines. It is also possible to have four organic substituents on the nitrogen. These species are not amines but are quaternary ammonium cations and have a charged nitrogen center. Quaternary ammonium salts exist with many kinds of anions. Naming conventions Amines are named in several ways. Typically, the compound is given the prefix "amino-" or the suffix "-amine". The prefix "N-" shows substitution on the nitrogen atom. An organic compound with multiple amino groups is called a diamine, triamine, tetraamine and so forth. Systematic names for some common amines: Physical properties Hydrogen bonding significantly influences the properties of primary and secondary amines. For example, methyl and ethyl amines are gases under standard conditions, whereas the corresponding methyl and ethyl alcohols are liquids. Amines possess a characteristic ammonia smell, liquid amines have a distinctive "fishy" and foul smell. The nitrogen atom features a lone electron pair that can bind H+ to form an ammonium ion R3NH+. The lone electron pair is represented in this article by a two dots above or next to the N. The water solubility of simple amines is enhanced by hydrogen bonding involving these lone electron pairs. Typically salts of ammonium compounds exhibit the following order of solubility in water: primary ammonium () > secondary ammonium () > tertiary ammonium (R3NH+). Small aliphatic amines display significant solubility in many solvents, whereas those with large substituents are lipophilic. Aromatic amines, such as aniline, have their lone pair electrons conjugated into the benzene ring, thus their tendency to engage in hydrogen bonding is diminished. Their boiling points are high and their solubility in water is low. Spectroscopic identification Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one. Structure Alkyl amines Alkyl amines characteristically feature tetrahedral nitrogen centers. C-N-C and C-N-H angles approach the idealized angle of 109°. C-N distances are slightly shorter than C-C distances. The energy barrier for the nitrogen inversion of the stereocenter is about 7 kcal/mol for a trialkylamine. The interconversion has been compared to the inversion of an open umbrella into a strong wind. Amines of the type NHRR' and NRR′R″ are chiral: the nitrogen center bears four substituents counting the lone pair. Because of the low barrier to inversion, amines of the type NHRR' cannot be obtained in optical purity. For chiral tertiary amines, NRR′R″ can only be resolved when the R, R', and R″ groups are constrained in cyclic structures such as N-substituted aziridines (quaternary ammonium salts are resolvable). Aromatic amines In aromatic amines ("anilines"), nitrogen is often nearly planar owing to conjugation of the lone pair with the aryl substituent. The C-N distance is correspondingly shorter. In aniline, the C-N distance is the same as the C-C distances. Basicity Like ammonia, amines are bases. Compared to alkali metal hydroxides, amines are weaker (see table for examples of conjugate acid Ka values). The basicity of amines depends on: The electronic properties of the substituents (alkyl groups enhance the basicity, aryl groups diminish it). The degree of solvation of the protonated amine, which includes steric hindrance by the groups on nitrogen. Electronic effects Owing to inductive effects, the basicity of an amine might be expected to increase with the number of alkyl groups on the amine. Correlations are complicated owing to the effects of solvation which are opposite the trends for inductive effects. Solvation effects also dominate the basicity of aromatic amines (anilines). For anilines, the lone pair of electrons on nitrogen delocalizes into the ring, resulting in decreased basicity. Substituents on the aromatic ring, and their positions relative to the amino group, also affect basicity as seen in the table. Solvation effects Solvation significantly affects the basicity of amines. N-H groups strongly interact with water, especially in ammonium ions. Consequently, the basicity of ammonia is enhanced by 1011 by solvation. The intrinsic basicity of amines, i.e. the situation where solvation is unimportant, has been evaluated in the gas phase. In the gas phase, amines exhibit the basicities predicted from the electron-releasing effects of the organic substituents. Thus tertiary amines are more basic than secondary amines, which are more basic than primary amines, and finally ammonia is least basic. The order of pKb's (basicities in water) does not follow this order. Similarly aniline is more basic than ammonia in the gas phase, but ten thousand times less so in aqueous solution. In aprotic polar solvents such as DMSO, DMF, and acetonitrile the energy of solvation is not as high as in protic polar solvents like water and methanol. For this reason, the basicity of amines in these aprotic solvents is almost solely governed by the electronic effects. Synthesis From alcohols Industrially significant alkyl amines are prepared from ammonia by alkylation with alcohols: ROH + NH3 -> RNH2 + H2O From alkyl and aryl halides Unlike the reaction of amines with alcohols the reaction of amines and ammonia with alkyl halides is used for synthesis in the laboratory: RX + 2 R'NH2 -> RR'NH + [RR'NH2]X In such reactions, which are more useful for alkyl iodides and bromides, the degree of alkylation is difficult to control such that one obtains mixtures of primary, secondary, and tertiary amines, as well as quaternary ammonium salts. Selectivity can be improved via the Delépine reaction, although this is rarely employed on an industrial scale. Selectivity is also assured in the Gabriel synthesis, which involves organohalide reacting with potassium phthalimide. Aryl halides are much less reactive toward amines and for that reason are more controllable. A popular way to prepare aryl amines is the Buchwald-Hartwig reaction. From alkenes Disubstituted alkenes react with HCN in the presence of strong acids to give formamides, which can be decarbonylated. This method, the Ritter reaction, is used industrially to produce tertiary amines such a tert-octylamine. Hydroamination of alkenes is also widely practiced. The reaction is catalyzed by zeolite-based solid acids. Reductive routes Via the process of hydrogenation, unsaturated N-containing functional groups are reduced to amines using hydrogen in the presence of a nickel catalyst. Suitable groups include nitriles, azides, imines including oximes, amides, and nitro. In the case of nitriles, reactions are sensitive to acidic or alkaline conditions, which can cause hydrolysis of the group. is more commonly employed for the reduction of these same groups on the laboratory scale. Many amines are produced from aldehydes and ketones via reductive amination, which can either proceed catalytically or stoichiometrically. Aniline () and its derivatives are prepared by reduction of the nitroaromatics. In industry, hydrogen is the preferred reductant, whereas, in the laboratory, tin and iron are often employed. Specialized methods Many methods exist for the preparation of amines, many of these methods being rather specialized. Reactions Alkylation, acylation, and sulfonation, etc. Aside from their basicity, the dominant reactivity of amines is their nucleophilicity. Most primary amines are good ligands for metal ions to give coordination complexes. Amines are alkylated by alkyl halides. Acyl chlorides and acid anhydrides react with primary and secondary amines to form amides (the "Schotten–Baumann reaction"). Similarly, with sulfonyl chlorides, one obtains sulfonamides. This transformation, known as the Hinsberg reaction, is a chemical test for the presence of amines. Because amines are basic, they neutralize acids to form the corresponding ammonium salts . When formed from carboxylic acids and primary and secondary amines, these salts thermally dehydrate to form the corresponding amides. Amines undergo sulfamation upon treatment with sulfur trioxide or sources thereof: R2NH + SO3 -> R2NSO3H Acid-base reactions Alkyl amines protonate near pH=7 to give alkylammonium derivative. Diazotization Amines reacts with nitrous acid to give diazonium salts. The alkyl diazonium salts are of little importance because they are too unstable. The most important members are derivatives of aromatic amines such as aniline ("phenylamine") (A = aryl or naphthyl): ANH2 + HNO2 + HX -> AN2+ + X- + 2 H2O Anilines and naphthylamines form more stable diazonium salts, which can be isolated in the crystalline form. Diazonium salts undergo a variety of useful transformations involving replacement of the group with anions. For example, cuprous cyanide gives the corresponding nitriles: AN2+ + Y- -> AY + N2 Aryldiazonium couple with electron-rich aromatic compounds such as a phenol to form azo compounds. Such reactions are widely applied to the production of dyes. Conversion to imines Imine formation is an important reaction. Primary amines react with ketones and aldehydes to form imines. In the case of formaldehyde (R'  H), these products typically exist as cyclic trimers. RNH2 + R'_2C=O -> R'_2C=NR + H2O Reduction of these imines gives secondary amines: R'_2C=NR + H2 -> R'_2CH-NHR Similarly, secondary amines react with ketones and aldehydes to form enamines: R2NH + R'(R''CH2)C=O -> R''CH=C(NR2)R' + H2O Overview An overview of the reactions of amines is given below: Biological activity Amines are ubiquitous in biology. The breakdown of amino acids releases amines, famously in the case of decaying fish which smell of trimethylamine. Many neurotransmitters are amines, including epinephrine, norepinephrine, dopamine, serotonin, and histamine. Protonated amino groups () are the most common positively charged moieties in proteins, specifically in the amino acid lysine. The anionic polymer DNA is typically bound to various amine-rich proteins. Additionally, the terminal charged primary ammonium on lysine forms salt bridges with carboxylate groups of other amino acids in polypeptides, which is one of the primary influences on the three-dimensional structures of proteins. Amine hormones Hormones derived from the modification of amino acids are referred to as amine hormones. Typically, the original structure of the amino acid is modified such that a –COOH, or carboxyl, group is removed, whereas the −NH+3, or amine, group remains. Amine hormones are synthesized from the amino acids tryptophan or tyrosine. Application of amines Dyes Primary aromatic amines are used as a starting material for the manufacture of azo dyes. It reacts with nitrous acid to form diazonium salt, which can undergo coupling reaction to form an azo compound. As azo-compounds are highly coloured, they are widely used in dyeing industries, such as: Methyl orange Direct brown 138 Sunset yellow FCF Ponceau Drugs Most drugs and drug candidates contain amine functional groups: Chlorpheniramine is an antihistamine that helps to relieve allergic disorders due to cold, hay fever, itchy skin, insect bites and stings. Chlorpromazine is a tranquilizer that sedates without inducing sleep. It is used to relieve anxiety, excitement, restlessness or even mental disorder. Ephedrine and phenylephrine, as amine hydrochlorides, are used as decongestants. Amphetamine, methamphetamine, and methcathinone are psychostimulant amines that are listed as controlled substances by the US DEA. Thioridazine, an antipsychotic drug, is an amide which is believed to exhibit its antipsychotic effects, in part, due to its effects on other amides. Amitriptyline, imipramine, lofepramine and clomipramine are tricyclic antidepressants and tertiary amines. Nortriptyline, desipramine, and amoxapine are tricyclic antidepressants and secondary amines. (The tricyclics are grouped by the nature of the final amino group on the side chain.) Substituted tryptamines and phenethylamines are key basic structures for a large variety of psychedelic drugs. Opiate analgesics such as morphine, codeine, and heroin are tertiary amines. Gas treatment Aqueous monoethanolamine (MEA), diglycolamine (DGA), diethanolamine (DEA), diisopropanolamine (DIPA) and methyldiethanolamine (MDEA) are widely used industrially for removing carbon dioxide (CO2) and hydrogen sulfide (H2S) from natural gas and refinery process streams. They may also be used to remove CO2 from combustion gases and flue gases and may have potential for abatement of greenhouse gases. Related processes are known as sweetening. Epoxy resin curing agents Amines are often used as epoxy resin curing agents. These include dimethylethylamine, cyclohexylamine, and a variety of diamines such as 4,4 -diaminodicyclohexylmethane. Multifunctional amines such as tetraethylenepentamine and triethylenetetramine are also widely used in this capacity. The reaction proceeds by the lone pair of electrons on the amine nitrogen attacking the outermost carbon on the oxirane ring of the epoxy resin. This relieves ring strain on the epoxide and is the driving force of the reaction. Safety Low molecular weight simple amines, such as ethylamine, are only weakly toxic with between 100 and 1000 mg/kg. They are skin irritants, especially as some are easily absorbed through the skin. Amines are a broad class of compounds, and more complex members of the class can be extremely bioactive, for example strychnine. See also Acid-base extraction Amine value Amine gas treating Ammine Biogenic amine Ligand isomerism Official naming rules for amines as determined by the International Union of Pure and Applied Chemistry (IUPAC) References Further reading External links Synthesis of amines Factsheet, amines in food Functional groups

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https://en.wikipedia.org/wiki/Amide

Amide

In organic chemistry, an amide, also known as an organic amide or a carboxamide, is a compound with the general formula , where R, R', and R″ represent any group, typically organyl groups or hydrogen atoms. The amide group is called a peptide bond when it is part of the main chain of a protein, and an isopeptide bond when it occurs in a side chain, such as in the amino acids asparagine and glutamine. It can be viewed as a derivative of a carboxylic acid () with the hydroxyl group () replaced by an amine group (); or, equivalently, an acyl (alkanoyl) group () joined to an amine group. Common of amides are formamide (), acetamide (), benzamide (), and dimethylformamide (). Some uncommon examples of amides are N-chloroacetamide () and chloroformamide (). Amides are qualified as primary, secondary, and tertiary according to whether the amine subgroup has the form , , or , where R and R' are groups other than hydrogen. Nomenclature The core of amides is called the amide group (specifically, carboxamide group). In the usual nomenclature, one adds the term "amide" to the stem of the parent acid's name. For instance, the amide derived from acetic acid is named acetamide (CH3CONH2). IUPAC recommends ethanamide, but this and related formal names are rarely encountered. When the amide is derived from a primary or secondary amine, the substituents on nitrogen are indicated first in the name. Thus, the amide formed from dimethylamine and acetic acid is N,N-dimethylacetamide (CH3CONMe2, where Me = CH3). Usually even this name is simplified to dimethylacetamide. Cyclic amides are called lactams; they are necessarily secondary or tertiary amides. Applications Amides are pervasive in nature and technology. Proteins and important plastics like Nylons, Aramid, Twaron, and Kevlar are polymers whose units are connected by amide groups (polyamides); these linkages are easily formed, confer structural rigidity, and resist hydrolysis. Amides include many other important biological compounds, as well as many drugs like paracetamol, penicillin and LSD. Low-molecular-weight amides, such as dimethylformamide, are common solvents. Structure and bonding The lone pair of electrons on the nitrogen atom is delocalized into the carbonyl group, thus forming a partial double bond between nitrogen and carbon. In fact the O, C and N atoms have molecular orbitals occupied by delocalized electrons, forming a conjugated system. Consequently, the three bonds of the nitrogen in amides is not pyramidal (as in the amines) but planar. This planar restriction prevents rotations about the N linkage and thus has important consequences for the mechanical properties of bulk material of such molecules, and also for the configurational properties of macromolecules built by such bonds. The inability to rotate distinguishes amide groups from ester groups which allow rotation and thus create more flexible bulk material. The C-C(O)NR2 core of amides is planar. The C=O distance is shorter than the C-N distance by almost 10%. The structure of an amide can be described also as a resonance between two alternative structures: neutral (A) and zwitterionic (B). It is estimated that for acetamide, structure A makes a 62% contribution to the structure, while structure B makes a 28% contribution. (These figures do not sum to 100% because there are additional less-important resonance forms that are not depicted above). There is also a hydrogen bond present between the active groups hydrogen and nitrogen atoms. Resonance is largely prevented in the very strained quinuclidone. In their IR spectra, amides exhibit a moderately intense νCO band near 1650 cm−1. The energy of this band is about 60 cm-1 lower than for the νCO of esters and ketones. This difference reflects the contribution of the zwitterionic resonance structure. Basicity Compared to amines, amides are very weak bases. While the conjugate acid of an amine has a pKa of about 9.5, the conjugate acid of an amide has a pKa around −0.5. Therefore, amides do not have as clearly noticeable acid–base properties in water. This relative lack of basicity is explained by the withdrawing of electrons from the amine by the carbonyl. On the other hand, amides are much stronger bases than carboxylic acids, esters, aldehydes, and ketones (their conjugate acids' pKas are between −6 and −10). The proton of a primary or secondary amide does not dissociate readily; its pKa is usually well above 15. Conversely, under extremely acidic conditions, the carbonyl oxygen can become protonated with a pKa of roughly −1. It is not only because of the positive charge on the nitrogen, but also because of the negative charge on the oxygen gained through resonance. Hydrogen bonding and solubility Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors. In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Thus amides can participate in hydrogen bonding with water and other protic solvents; the oxygen atom can accept hydrogen bonds from water and the N–H hydrogen atoms can donate H-bonds. As a result of interactions such as these, the water solubility of amides is greater than that of corresponding hydrocarbons. These hydrogen bonds are also have an important role in the secondary structure of proteins. The solubilities of amides and esters are roughly comparable. Typically amides are less soluble than comparable amines and carboxylic acids since these compounds can both donate and accept hydrogen bonds. Tertiary amides, with the important exception of N,N-dimethylformamide, exhibit low solubility in water. Reactions Amides undergo many chemical reactions, although they are less reactive than esters. Amides hydrolyse in hot alkali as well as in strong acidic conditions. Acidic conditions yield the carboxylic acid and the ammonium ion while basic hydrolysis yield the carboxylate ion and ammonia. The protonation of the initially generated amine under acidic conditions and the deprotonation of the initially generated carboxylic acid under basic conditions render these processes non-catalytic and irreversible. Amides are also versatile precursors to many other functional groups. Electrophiles react with the carbonyl oxygen. This step often precedes hydrolysis, which is catalyzed by both Brønsted acids and Lewis acids. Enzymes, e.g. peptidases and artificial catalysts, are known to accelerate the hydrolysis reactions. Synthesis From carboxylic acids and related compounds Amides are usually prepared by coupling carboxylic acid with an amine. The direct reaction generally requires high temperatures to drive off the water: A set of common methods involve "activating" the carboxylic acid by converting it to a better electrophile. Thus, esters, acid chlorides (Schotten-Baumann reaction), or anhydrides (Lumière–Barbier method) all react with amines to give amides: Peptide synthesis use coupling agents such as HATU, HOBt, or PyBOP. From nitriles The hydrolysis of nitriles is conducted on an industrial scale to produce fatty amines. Laboratory procedures are also available. Specialty routes Many specialized methods also yield amides. A variety of reagents, e.g. tris(2,2,2-trifluoroethyl) borate have been developed for specialized applications. See also Amidogen Amino radical Amidicity Imidic acid Metal amides References External links IUPAC Compendium of Chemical Terminology Functional groups

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https://en.wikipedia.org/wiki/Animism

Animism

Animism (from Latin: meaning 'breath, spirit, life') is the belief that objects, places, and creatures all possess a distinct spiritual essence. Animism perceives all things—animals, plants, rocks, rivers, weather systems, human handiwork, and in some cases words—as animated and alive. Animism is used in anthropology of religion as a term for the belief system of many Indigenous peoples in contrast to the relatively more recent development of organized religions. Animism focuses on the metaphysical universe; specifically, on the concept of the immaterial soul. Although each culture has its own mythologies and rituals, animism is said to describe the most common, foundational thread of indigenous peoples' "spiritual" or "supernatural" perspectives. The animistic perspective is so widely held and inherent to most indigenous peoples that they often do not even have a word in their languages that corresponds to "animism" (or even "religion"). The term "animism" is an anthropological construct. Largely due to such ethnolinguistic and cultural discrepancies, opinions differ on whether animism refers to an ancestral mode of experience common to indigenous peoples around the world or to a full-fledged religion in its own right. The currently accepted definition of animism was only developed in the late 19th century (1871) by Edward Tylor. It is "one of anthropology's earliest concepts, if not the first." Animism encompasses beliefs that all material phenomena have agency, that there exists no categorical distinction between the spiritual and physical world, and that soul, spirit, or sentience exists not only in humans but also in other animals, plants, rocks, geographic features (such as mountains and rivers), and other entities of the natural environment. Examples include water sprites, vegetation deities, and tree spirits, among others. Animism may further attribute a life force to abstract concepts such as words, true names, or metaphors in mythology. Some members of the non-tribal world also consider themselves animists, such as author Daniel Quinn, sculptor Lawson Oyekan, and many contemporary Pagans. Etymology English anthropologist Sir Edward Tylor initially wanted to describe the phenomenon as spiritualism, but he realized that it would cause confusion with the modern religion of spiritualism, which was then prevalent across Western nations. He adopted the term animism from the writings of German scientist Georg Ernst Stahl, who had developed the term in 1708 as a biological theory that souls formed the vital principle, and that the normal phenomena of life and the abnormal phenomena of disease could be traced to spiritual causes. The origin of the word comes from the Latin word anima, which means life or soul. The first known usage in English appeared in 1819. "Old animism" definitions Earlier anthropological perspectives, which have since been termed the old animism, were concerned with knowledge on what is alive and what factors make something alive. The old animism assumed that animists were individuals who were unable to understand the difference between persons and things. Critics of the old animism have accused it of preserving "colonialist and dualistic worldviews and rhetoric." Edward Tylor's definition The idea of animism was developed by anthropologist Sir Edward Tylor through his 1871 book Primitive Culture, in which he defined it as "the general doctrine of souls and other spiritual beings in general." According to Tylor, animism often includes "an idea of pervading life and will in nature;" a belief that natural objects other than humans have souls. This formulation was little different from that proposed by Auguste Comte as "fetishism", but the terms now have distinct meanings. For Tylor, animism represented the earliest form of religion, being situated within an evolutionary framework of religion that has developed in stages and which will ultimately lead to humanity rejecting religion altogether in favor of scientific rationality. Thus, for Tylor, animism was fundamentally seen as a mistake, a basic error from which all religions grew. He did not believe that animism was inherently illogical, but he suggested that it arose from early humans' dreams and visions and thus was a rational system. However, it was based on erroneous, unscientific observations about the nature of reality. Stringer notes that his reading of Primitive Culture led him to believe that Tylor was far more sympathetic in regard to "primitive" populations than many of his contemporaries and that Tylor expressed no belief that there was any difference between the intellectual capabilities of "savage" people and Westerners. The idea that there had once been "one universal form of primitive religion" (whether labelled animism, totemism, or shamanism) has been dismissed as "unsophisticated" and "erroneous" by archaeologist Timothy Insoll, who stated that "it removes complexity, a precondition of religion now, in all its variants." Social evolutionist conceptions Tylor's definition of animism was part of a growing international debate on the nature of "primitive society" by lawyers, theologians, and philologists. The debate defined the field of research of a new science: anthropology. By the end of the 19th century, an orthodoxy on "primitive society" had emerged, but few anthropologists still would accept that definition. The "19th-century armchair anthropologists" argued that "primitive society" (an evolutionary category) was ordered by kinship and divided into exogamous descent groups related by a series of marriage exchanges. Their religion was animism, the belief that natural species and objects had souls. With the development of private property, the descent groups were displaced by the emergence of the territorial state. These rituals and beliefs eventually evolved over time into the vast array of "developed" religions. According to Tylor, as society became more scientifically advanced, fewer members of that society would believe in animism. However, any remnant ideologies of souls or spirits, to Tylor, represented "survivals" of the original animism of early humanity. Confounding animism with totemism In 1869 (three years after Tylor proposed his definition of animism), Edinburgh lawyer John Ferguson McLennan, argued that the animistic thinking evident in fetishism gave rise to a religion he named totemism. Primitive people believed, he argued, that they were descended from the same species as their totemic animal. Subsequent debate by the "armchair anthropologists" (including J. J. Bachofen, Émile Durkheim, and Sigmund Freud) remained focused on totemism rather than animism, with few directly challenging Tylor's definition. Anthropologists "have commonly avoided the issue of animism and even the term itself, rather than revisit this prevalent notion in light of their new and rich ethnographies." According to anthropologist Tim Ingold, animism shares similarities with totemism but differs in its focus on individual spirit beings which help to perpetuate life, whereas totemism more typically holds that there is a primary source, such as the land itself or the ancestors, who provide the basis to life. Certain indigenous religious groups such as the Australian Aboriginals are more typically totemic in their worldview, whereas others like the Inuit are more typically animistic. From his studies into child development, Jean Piaget suggested that children were born with an innate animist worldview in which they anthropomorphized inanimate objects and that it was only later that they grew out of this belief. Conversely, from her ethnographic research, Margaret Mead argued the opposite, believing that children were not born with an animist worldview but that they became acculturated to such beliefs as they were educated by their society. Stewart Guthrie saw animism—or "attribution" as he preferred it—as an evolutionary strategy to aid survival. He argued that both humans and other animal species view inanimate objects as potentially alive as a means of being constantly on guard against potential threats. His suggested explanation, however, did not deal with the question of why such a belief became central to the religion. In 2000, Guthrie suggested that the "most widespread" concept of animism was that it was the "attribution of spirits to natural phenomena such as stones and trees." "New animism" non-archaic definitions Many anthropologists ceased using the term animism, deeming it to be too close to early anthropological theory and religious polemic. However, the term had also been claimed by religious groups—namely, Indigenous communities and nature worshippers—who felt that it aptly described their own beliefs, and who in some cases actively identified as "animists." It was thus readopted by various scholars, who began using the term in a different way, placing the focus on knowing how to behave toward other beings, some of whom are not human. As religious studies scholar Graham Harvey stated, while the "old animist" definition had been problematic, the term animism was nevertheless "of considerable value as a critical, academic term for a style of religious and cultural relating to the world." Hallowell and the Ojibwe The new animism emerged largely from the publications of anthropologist Irving Hallowell, produced on the basis of his ethnographic research among the Ojibwe communities of Canada in the mid-20th century. For the Ojibwe encountered by Hallowell, personhood did not require human-likeness, but rather humans were perceived as being like other persons, who for instance included rock persons and bear persons. For the Ojibwe, these persons were each willful beings, who gained meaning and power through their interactions with others; through respectfully interacting with other persons, they themselves learned to "act as a person". Hallowell's approach to the understanding of Ojibwe personhood differed strongly from prior anthropological concepts of animism. He emphasized the need to challenge the modernist, Western perspectives of what a person is, by entering into a dialogue with different worldwide views. Hallowell's approach influenced the work of anthropologist Nurit Bird-David, who produced a scholarly article reassessing the idea of animism in 1999. Seven comments from other academics were provided in the journal, debating Bird-David's ideas. Postmodern anthropology More recently, postmodern anthropologists are increasingly engaging with the concept of animism. Modernism is characterized by a Cartesian subject-object dualism that divides the subjective from the objective, and culture from nature. In the modernist view, animism is the inverse of scientism, and hence, is deemed inherently invalid by some anthropologists. Drawing on the work of Bruno Latour, some anthropologists question modernist assumptions and theorize that all societies continue to "animate" the world around them. In contrast to Tylor's reasoning, however, this "animism" is considered to be more than just a remnant of primitive thought. More specifically, the "animism" of modernity is characterized by humanity's "professional subcultures", as in the ability to treat the world as a detached entity within a delimited sphere of activity. Human beings continue to create personal relationships with elements of the aforementioned objective world, such as pets, cars, or teddy bears, which are recognized as subjects. As such, these entities are "approached as communicative subjects rather than the inert objects perceived by modernists." These approaches aim to avoid the modernist assumption that the environment consists of a physical world distinct from the world of humans, as well as the modernist conception of the person being composed dualistically of a body and a soul. Nurit Bird-David argues that: She explains that animism is a "relational epistemology" rather than a failure of primitive reasoning. That is, self-identity among animists is based on their relationships with others, rather than any distinctive features of the "self". Instead of focusing on the essentialized, modernist self (the "individual"), persons are viewed as bundles of social relationships ("dividuals"), some of which include "superpersons" (i.e. non-humans). Stewart Guthrie expressed criticism of Bird-David's attitude towards animism, believing that it promulgated the view that "the world is in large measure whatever our local imagination makes it." This, he felt, would result in anthropology abandoning "the scientific project." Like Bird-David, Tim Ingold argues that animists do not see themselves as separate from their environment: Rane Willerslev extends the argument by noting that animists reject this Cartesian dualism and that the animist self identifies with the world, "feeling at once within and apart from it so that the two glide ceaselessly in and out of each other in a sealed circuit". The animist hunter is thus aware of himself as a human hunter, but, through mimicry, is able to assume the viewpoint, senses, and sensibilities of his prey, to be one with it. Shamanism, in this view, is an everyday attempt to influence spirits of ancestors and animals, by mirroring their behaviors, as the hunter does its prey. Ethical and ecological understanding Cultural ecologist and philosopher David Abram proposed an ethical and ecological understanding of animism, grounded in the phenomenology of sensory experience. In his books The Spell of the Sensuous and Becoming Animal, Abram suggests that material things are never entirely passive in our direct perceptual experience, holding rather that perceived things actively "solicit our attention" or "call our focus," coaxing the perceiving body into an ongoing participation with those things. In the absence of intervening technologies, he suggests that sensory experience is inherently animistic in that it discloses a material field that is animate and self-organizing from the beginning. David Abram used contemporary cognitive and natural science, as well as the perspectival worldviews of diverse indigenous oral cultures, Abram proposed a richly pluralist and story-based cosmology in which matter is alive. He suggested that such a relational ontology is in close accord with humanity's spontaneous perceptual experience by drawing attention to the senses, and to the primacy of sensuous terrain, enjoining a more respectful and ethical relation to the more-than-human community of animals, plants, soils, mountains, waters, and weather-patterns that materially sustains humanity. In contrast to a long-standing tendency in the Western social sciences, which commonly provide rational explanations of animistic experience, Abram develops an animistic account of reason itself. He holds that civilised reason is sustained only by intensely animistic participation between human beings and their own written signs. For instance, as soon as someone reads letters on a page or screen, they can "see what it says"—the letters speak as much as nature spoke to pre-literate peoples. Reading can usefully be understood as an intensely concentrated form of animism, one that effectively eclipses all of the other, older, more spontaneous forms of animistic participation in which humans were once engaged. Relation to the concept of 'I-thou' Religious studies scholar Graham Harvey defined animism as the belief "that the world is full of persons, only some of whom are human, and that life is always lived in relationship with others." He added that it is therefore "concerned with learning how to be a good person in respectful relationships with other persons." In his Handbook of Contemporary Animism (2013), Harvey identifies the animist perspective in line with Martin Buber's "I-thou" as opposed to "I-it". In such, Harvey says, the animist takes an I-thou approach to relating to the world, whereby objects and animals are treated as a "thou", rather than as an "it". Religion There is ongoing disagreement (and no general consensus) as to whether animism is merely a singular, broadly encompassing religious belief or a worldview in and of itself, comprising many diverse mythologies found worldwide in many diverse cultures. This also raises a controversy regarding the ethical claims animism may or may not make: whether animism ignores questions of ethics altogether; or, by endowing various non-human elements of nature with spirituality or personhood, it in fact promotes a complex ecological ethics. Concepts Distinction from pantheism Animism is not the same as pantheism, although the two are sometimes confused. Moreover, some religions are both pantheistic and animistic. One of the main differences is that while animists believe everything to be spiritual in nature, they do not necessarily see the spiritual nature of everything in existence as being united (monism) the way pantheists do. As a result, animism puts more emphasis on the uniqueness of each individual soul. In pantheism, everything shares the same spiritual essence, rather than having distinct spirits or souls. For example, Giordano Bruno equated the world soul with God and espoused a pantheistic animism. Fetishism / totemism In many animistic world views, the human being is often regarded as on a roughly equal footing with other animals, plants, and natural forces. African indigenous religions Traditional African religions: most religious traditions of Sub-Saharan Africa are basically a complex form of animism with polytheistic and shamanistic elements and ancestor worship. In East Africa the Kerma culture display Animistic elements similar to other Traditional African religions. In contrast, the later polytheistic Napatan and Meroitic periods, with displays of animals in Amulets and the esteemed antiques of Lions, appear to be an Animistic culture rather than a polytheistic culture. The Kermans likely treated Jebel Barkal as a special sacred site, and passed it on to the Kushites and Egyptians who venerated the mesa. In North Africa, the traditional Berber religion includes the traditional polytheistic, animist, and in some rare cases, shamanistic, religions of the Berber people. Asian origin religions Indian-origin religions In the Indian-origin religions, namely Hinduism, Buddhism, Jainism, and Sikhism, the animistic aspects of nature worship and ecological conservation are part of the core belief system. Matsya Purana, a Hindu text, has a Sanskrit language shloka (hymn), which explains the importance of reverence of ecology. It states, "A pond equals ten wells, a reservoir equals ten ponds, while a son equals ten reservoirs, and a tree equals ten sons." Indian religions worship trees such as the Bodhi Tree and numerous superlative banyan trees, conserve the sacred groves of India, revere the rivers as sacred, and worship the mountains and their ecology. Panchavati are the sacred trees in Indic religions, which are sacred groves containing five type of trees, usually chosen from among the Vata (Ficus benghalensis, Banyan), Ashvattha (Ficus religiosa, Peepal), Bilva (Aegle marmelos, Bengal Quince), Amalaki (Phyllanthus emblica, Indian Gooseberry, Amla), Ashoka (Saraca asoca, Ashok), Udumbara (Ficus racemosa, Cluster Fig, Gular), Nimba (Azadirachta indica, Neem) and Shami (Prosopis spicigera, Indian Mesquite). The banyan is considered holy in several religious traditions of India. The Ficus benghalensis is the national tree of India. Vat Purnima is a Hindu festival related to the banyan tree, and is observed by married women in North India and in the Western Indian states of Maharashtra, Goa, Gujarat. For three days of the month of Jyeshtha in the Hindu calendar (which falls in May–June in the Gregorian calendar) married women observe a fast, tie threads around a banyan tree, and pray for the well-being of their husbands. Thimmamma Marrimanu, sacred to Indian religions, has branches spread over five acres and was listed as the world's largest banyan tree in the Guinness World Records in 1989. In Hinduism, the leaf of the banyan tree is said to be the resting place for the god Krishna. In the Bhagavat Gita, Krishna said, "There is a banyan tree which has its roots upward and its branches down, and the Vedic hymns are its leaves. One who knows this tree is the knower of the Vedas." (Bg 15.1) In Buddhism's Pali canon, the banyan (Pali: nigrodha) is referenced numerous times. Typical metaphors allude to the banyan's epiphytic nature, likening the banyan's supplanting of a host tree as comparable to the way sensual desire (kāma) overcomes humans. Mun (also known as Munism or Bongthingism) is the traditional polytheistic, animist, shamanistic, and syncretic religion of the Lepcha people. Chinese religions Shendao () is a term originated by Chinese folk religions influenced by, Mohist, Confucian and Taoist philosophy, referring to the divine order of nature or the Wuxing. Japan and Shinto Shinto is the traditional Japanese folk religion and has many animist aspects. The , a class of supernatural beings, are central to Shinto. All things, including natural forces and well-known geographical locations, are thought to be home to the kami. The kami are worshipped at kamidana household shrines, family shrines, and jinja public shrines. The Ryukyuan religion of the Ryukyu islands is distinct from Shinto, but shares similar characteristics. Kalash people Kalash people of Northern Pakistan follow an ancient animistic religion identified with an ancient form of Hinduism. Korea Muism, the native Korean belief, has many animist aspects. The various deities, called kwisin, are capable of interacting with humans and causing problems if they are not honoured appropriately. Philippines indigenous religions In the indigenous Philippine folk religions, pre-colonial religions of Philippines and Philippine mythology, animism is part of their core beliefs as demonstrated by the belief in Anito and Bathala as well as their conservation and veneration of sacred Indigenous Philippine shrines, forests, mountains and sacred grounds. Anito (lit. '[ancestor] spirit') refers to the various indigenous shamanistic folk religions of the Philippines, led by female or feminized male shamans known as babaylan. It includes belief in a spirit world existing alongside and interacting with the material world, as well as the belief that everything has a spirit, from rocks and trees to animals and humans to natural phenomena. In indigenous Filipino belief, the Bathala is the omnipotent deity which was derived from Sanskrit word for the Hindu supreme deity bhattara, as one of the ten avatars of the Hindu god Vishnu. The omnipotent Bathala also presides over the spirits of ancestors called Anito. Anitos serve as intermediaries between mortals and the divine, such as Agni (Hindu) who holds the access to divine realms; for this reason they are invoked first and are the first to receive offerings, regardless of the deity the worshipper wants to pray to. Abrahamic religions Animism also has influences in Abrahamic religions. The Old Testament and the Wisdom literature preach the omnipresence of God (Jeremiah 23:24; Proverbs 15:3; 1 Kings 8:27), and God is bodily present in the incarnation of his Son, Jesus Christ. (Gospel of John 1:14, Colossians 2:9). Animism is not peripheral to Christian identity but is its nurturing home ground, its axis mundi. In addition to the conceptual work the term animism performs, it provides insight into the relational character and common personhood of material existence. With rising awareness of ecological preservation, recently theologians like Mark I. Wallace argue for animistic Christianity with a biocentric approach that understands God being present in all earthly objects, such as animals, trees, and rocks. Pre-Islamic Arab religion Pre-Islamic Arab religion can refer to the traditional polytheistic, animist, and in some rare cases, shamanistic, religions of the peoples of the Arabian Peninsula. The belief in jinn, invisible entities akin to spirits in the Western sense dominant in the Arab religious systems, hardly fit the description of Animism in a strict sense. The jinn are considered to be analogous to the human soul by living lives like that of humans, but they are not exactly like human souls neither are they spirits of the dead. It is unclear if belief in jinn derived from nomadic or sedentary populations. Neopagan and New Age movements Some Neopagan groups, including Eco-pagans, describe themselves as animists, meaning that they respect the diverse community of living beings and spirits with whom humans share the world and cosmos. The New Age movement commonly demonstrates animistic traits in asserting the existence of nature spirits. Shamanism A shaman is a person regarded as having access to, and influence in, the world of benevolent and malevolent spirits, who typically enters into a trance state during a ritual, and practices divination and healing. According to Mircea Eliade, shamanism encompasses the premise that shamans are intermediaries or messengers between the human world and the spirit worlds. Shamans are said to treat ailments and illnesses by mending the soul. Alleviating traumas affecting the soul or spirit restores the physical body of the individual to balance and wholeness. The shaman also enters supernatural realms or dimensions to obtain solutions to problems afflicting the community. Shamans may visit other worlds or dimensions to bring guidance to misguided souls and to ameliorate illnesses of the human soul caused by foreign elements. The shaman operates primarily within the spiritual world, which in turn affects the human world. The restoration of balance results in the elimination of the ailment. Abram, however, articulates a less supernatural and much more ecological understanding of the shaman's role than that propounded by Eliade. Drawing upon his own field research in Indonesia, Nepal, and the Americas, Abram suggests that in animistic cultures, the shaman functions primarily as an intermediary between the human community and the more-than-human community of active agencies—the local animals, plants, and landforms (mountains, rivers, forests, winds, and weather patterns, all of which are felt to have their own specific sentience). Hence, the shaman's ability to heal individual instances of dis-ease (or imbalance) within the human community is a byproduct of their more continual practice of balancing the reciprocity between the human community and the wider collective of animate beings in which that community is embedded. Animist life Non-human animals Animism entails the belief that "all living things have a soul", and thus, a central concern of animist thought surrounds how animals can be eaten, or otherwise used for humans' subsistence needs. The actions of non-human animals are viewed as "intentional, planned and purposive", and they are understood to be persons, as they are both alive, and communicate with others. In animist worldviews, non-human animals are understood to participate in kinship systems and ceremonies with humans, as well as having their own kinship systems and ceremonies. Harvey cited an example of an animist understanding of animal behavior that occurred at a powwow held by the Conne River Mi'kmaq in 1996; an eagle flew over the proceedings, circling over the central drum group. The assembled participants called out ('eagle'), conveying welcome to the bird and expressing pleasure at its beauty, and they later articulated the view that the eagle's actions reflected its approval of the event, and the Mi'kmaq's return to traditional spiritual practices. In animism, rituals are performed to maintain relationships between humans and spirits. Indigenous peoples often perform these rituals to appease the spirits and request their assistance during activities such as hunting and healing. In the Arctic region, certain rituals are common before the hunt as a means to show respect for the spirits of animals. Flora Some animists also view plant and fungi life as persons and interact with them accordingly. The most common encounter between humans and these plant and fungi persons is with the former's collection of the latter for food, and for animists, this interaction typically has to be carried out respectfully. Harvey cited the example of Māori communities in New Zealand, who often offer karakia invocations to sweet potatoes as they dig up the latter. While doing so, there is an awareness of a kinship relationship between the Māori and the sweet potatoes, with both understood as having arrived in Aotearoa together in the same canoes. In other instances, animists believe that interaction with plant and fungi persons can result in the communication of things unknown or even otherwise unknowable. Among some modern Pagans, for instance, relationships are cultivated with specific trees, who are understood to bestow knowledge or physical gifts, such as flowers, sap, or wood that can be used as firewood or to fashion into a wand; in return, these Pagans give offerings to the tree itself, which can come in the form of libations of mead or ale, a drop of blood from a finger, or a strand of wool. The elements Various animistic cultures also comprehend stones as persons. Discussing ethnographic work conducted among the Ojibwe, Harvey noted that their society generally conceived of stones as being inanimate, but with two notable exceptions: the stones of the Bell Rocks and those stones which are situated beneath trees struck by lightning, which were understood to have become Thunderers themselves. The Ojibwe conceived of weather as being capable of having personhood, with storms being conceived of as persons known as 'Thunderers' whose sounds conveyed communications and who engaged in seasonal conflict over the lakes and forests, throwing lightning at lake monsters. Wind, similarly, can be conceived as a person in animistic thought. The importance of place is also a recurring element of animism, with some places being understood to be persons in their own right. Spirits Animism can also entail relationships being established with non-corporeal spirit entities. Other usage Science In the early 20th century, William McDougall defended a form of animism in his book Body and Mind: A History and Defence of Animism (1911). Physicist Nick Herbert has argued for "quantum animism" in which the mind permeates the world at every level: Werner Krieglstein wrote regarding his quantum Animism: In Error and Loss: A Licence to Enchantment, Ashley Curtis (2018) has argued that the Cartesian idea of an experiencing subject facing off with an inert physical world is incoherent at its very foundation and that this incoherence is consistent with rather than belied by Darwinism. Human reason (and its rigorous extension in the natural sciences) fits an evolutionary niche just as echolocation does for bats and infrared vision does for pit vipers, and is epistemologically on a par with, rather than superior to, such capabilities. The meaning or aliveness of the "objects" we encounter, rocks, trees, rivers, and other animals, thus depends for its validity not on a detached cognitive judgment, but purely on the quality of our experience. The animist experience, or the wolf's or raven's experience, thus become licensed as equally valid worldviews to the modern western scientific one; they are indeed more valid, since they are not plagued with the incoherence that inevitably arises when "objective existence" is separated from "subjective experience." Socio-political impact Harvey opined that animism's views on personhood represented a radical challenge to the dominant perspectives of modernity, because it accords "intelligence, rationality, consciousness, volition, agency, intentionality, language, and desire" to non-humans. Similarly, it challenges the view of human uniqueness that is prevalent in both Abrahamic religions and Western rationalism. Art and literature Animist beliefs can also be expressed through artwork. For instance, among the Māori communities of New Zealand, there is an acknowledgement that creating art through carving wood or stone entails violence against the wood or stone person and that the persons who are damaged therefore have to be placated and respected during the process; any excess or waste from the creation of the artwork is returned to the land, while the artwork itself is treated with particular respect. Harvey, therefore, argued that the creation of art among the Māori was not about creating an inanimate object for display, but rather a transformation of different persons within a relationship. Harvey expressed the view that animist worldviews were present in various works of literature, citing such examples as the writings of Alan Garner, Leslie Silko, Barbara Kingsolver, Alice Walker, Daniel Quinn, Linda Hogan, David Abram, Patricia Grace, Chinua Achebe, Ursula Le Guin, Louise Erdrich, and Marge Piercy. Animist worldviews have also been identified in the animated films of Hayao Miyazaki. See also Anecdotal cognitivism Animatism Anima mundi Dayawism Ecotheology Hylozoism Mana Mauri (life force) Kaitiaki Panpsychism Religion and environmentalism Sacred trees Shamanism Wildlife totemization References Sources Further reading Abram, David. 2010. Becoming Animal: An Earthly Cosmology (New York: Pantheon Books) Badenberg, Robert. 2007. "How about 'Animism'? An Inquiry beyond Label and Legacy." In Mission als Kommunikation: Festschrift für Ursula Wiesemann zu ihrem 75, Geburtstag, edited by K. W. Müller. Nürnberg: VTR () and Bonn: VKW (). Hallowell, Alfred Irving. 1960. "Ojibwa ontology, behavior, and world view." In Culture in History, edited by S. Diamond. (New York: Columbia University Press). Reprint: 2002. Pp. 17–49 in Readings in Indigenous Religions, edited by G. Harvey. London: Continuum. Harvey, Graham. 2005. Animism: Respecting the Living World. London: Hurst & Co. Ingold, Tim. 2006. "Rethinking the animate, re-animating thought." Ethnos 71(1):9–20. Käser, Lothar. 2004. Animismus. Eine Einführung in die begrifflichen Grundlagen des Welt- und Menschenbildes traditionaler (ethnischer) Gesellschaften für Entwicklungshelfer und kirchliche Mitarbeiter in Übersee. Bad Liebenzell: Liebenzeller Mission. . mit dem verkürzten Untertitel Einführung in seine begrifflichen Grundlagen auch bei: Erlanger Verlag für Mission und Okumene, Neuendettelsau 2004, Quinn, Daniel. [1996] 1997. The Story of B: An Adventure of the Mind and Spirit. New York: Bantam Books, and the essay "Our Religions: Are They the Religions of Humanity Itself?", usually available at Ishmael.org Wundt, Wilhelm. 1906. Mythus und Religion, Teil II. Leipzig 1906 (Völkerpsychologie II) External links Animism, Internet Encyclopedia of Philosophy Animism, Rinri, Modernization; the Base of Japanese Robotics Urban Legends Reference Pages: Weight of the Soul Animist Network Anthropology of religion Metaphysical theories Panentheism Philosophy of religion Polytheism Schools of thought Spiritism Spiritualism Spirituality Transtheism

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https://en.wikipedia.org/wiki/Abraxas

Abraxas

Abraxas (, variant form romanized: ) is a word of mystic meaning in the system of the Gnostic Basilides, being there applied to the "Great Archon" (), the princeps of the 365 spheres (). The word is found in Gnostic texts such as the Holy Book of the Great Invisible Spirit, and also appears in the Greek Magical Papyri. It was engraved on certain antique gemstones, called on that account Abraxas stones, which were used as amulets or charms. As the initial spelling on stones was (), the spelling of seen today probably originates in the confusion made between the Greek letters sigma (Σ) and xi (Ξ) in the Latin transliteration. The seven letters spelling its name may represent each of the seven classic planets. The word may be related to Abracadabra, although other explanations exist. There are similarities and differences between such figures in reports about Basilides's teaching, ancient Gnostic texts, the larger Greco-Roman magical traditions, and modern magical and esoteric writings. Speculations have proliferated on Abraxas in recent centuries, who has been claimed to be both an Egyptian god and a demon. Etymology Gaius Julius Hyginus (Fab. 183) gives Abrax Aslo Therbeeo as names of horses of the sun mentioned by 'Homerus'. The passage is miserably corrupt: but it may not be accidental that the first three syllables make Abraxas. The proper form of the name is evidently Abrasax, as with the Greek writers, Hippolytus, Epiphanius, Didymus (De Trin. iii. 42), and Theodoret; also Augustine and Praedestinatus; and in nearly all the legends on gems. By a probably euphonic inversion the translator of Irenaeus and the other Latin authors have Abraxas, which is found in the magical papyri, and even, though most sparingly, on engraved stones. The attempts to discover a derivation for the name, Greek, Hebrew, Coptic, or other, have not been entirely successful: Egyptian Claudius Salmasius (1588-1653) thought it Egyptian, but never gave the proofs which he promised. J. J. Bellermann thinks it is a compound of the Egyptian words and , meaning "the honorable and hallowed word", or "the word is adorable". Samuel Sharpe finds in it an Egyptian invocation to the Godhead, meaning "hurt me not". Hebrew Abraham Geiger sees in it a Grecized form of , "the blessing", a meaning which Charles William King declares philologically untenable. J. B. Passerius derives it from , "father", , "to create", and negative—"the uncreated Father". Giuseppe Barzilai goes back for explanation to the first verse of the prayer attributed to Nehunya ben HaKanah, the literal rendering of which is "O [God], with thy mighty right hand deliver the unhappy [people]", forming from the initial and final letters of the words the word Abrakd (pronounced Abrakad), with the meaning "the host of the winged ones", i.e., angels. While this theory can explain the mystic word Abracadabra, the association of this phrase with Abrasax is uncertain. Greek Wendelin discovers a compound of the initial letters, amounting to 365 in numerical value, of four Hebrew and three Greek words, all written with Greek characters: ("Father, Son, Spirit, holy; salvation from the cross"). According to a note of Isaac de Beausobre's, Jean Hardouin accepted the first three of these, taking the four others for the initials of the Greek , "saving mankind by the holy cross". Isaac de Beausobre derives Abraxas from the Greek and , "the beautiful, the glorious Savior". Perhaps the word may be included among those mysterious expressions discussed by Adolf von Harnack, "which belong to no known speech, and by their singular collocation of vowels and consonants give evidence that they belong to some mystic dialect, or take their origin from some supposed divine inspiration". The Egyptian author of the book De Mysteriis in reply to Porphyry (vii. 4) admits a preference of 'barbarous' to vernacular names in sacred things, urging a peculiar sanctity in the languages of certain nations, as the Egyptians and Assyrians; and Origen (Contra Cels. i. 24) refers to the 'potent names' used by Egyptian sages, Persian Magi, and Indian Brahmins, signifying deities in the several languages. Sources It is uncertain what the actual role and function of Abraxas was in the Basilidian system, as our authorities (see below) often show no direct acquaintance with the doctrines of Basilides himself. As an archon In the system described by Irenaeus, "the Unbegotten Father" is the progenitor of Nous, and Nous produced Logos, Logos produced Phronesis, Phronesis produced Sophia and Dynamis, Sophia and Dynamis produced principalities, powers, and angels, the last of whom create "the first heaven". They in turn originate a second series, who create a second heaven. The process continues in like manner until 365 heavens are in existence, the angels of the last or visible heaven being the authors of our world. "The ruler" [principem, i.e., probably ton archonta] of the 365 heavens "is Abraxas, and for this reason he contains within himself 365 numbers". The name occurs in the Refutation of all Heresies (vii. 26) by Hippolytus, who appears in these chapters to have followed the Exegetica of Basilides. After describing the manifestation of the Gospel in the Ogdoad and Hebdomad, he adds that the Basilidians have a long account of the innumerable creations and powers in the several 'stages' of the upper world (diastemata), in which they speak of 365 heavens and say that "their great archon" is Abrasax, because his name contains the number 365, the number of the days in the year; i.e. the sum of the numbers denoted by the Greek letters in ΑΒΡΑΣΑΞ according to the rules of isopsephy is 365: As a god Epiphanius (Haer. 69, 73 f.) appears to follow partly Irenaeus, partly the lost Compendium of Hippolytus. He designates Abraxas more distinctly as "the power above all, and First Principle", "the cause and first archetype" of all things; and mentions that the Basilidians referred to 365 as the number of parts (mele) in the human body, as well as of days in the year. The author of the appendix to Tertullian De Praescr. Haer. (c. 4), who likewise follows Hippolytus's Compendium, adds some further particulars; that 'Abraxas' gave birth to Mind (nous), the first in the series of primary powers enumerated likewise by Irenaeus and Epiphanius; that the world, as well as the 365 heavens, was created in honour of 'Abraxas'; and that Christ was sent not by the Maker of the world but by 'Abraxas'. Nothing can be built on the vague allusions of Jerome, according to whom 'Abraxas' meant for Basilides "the greatest God" (De vir. ill. 21), "the highest God" (Dial. adv. Lucif. 23), "the Almighty God" (Comm. in Amos iii. 9), and "the Lord the Creator" (Comm. in Nah. i. 11). The notices in Theodoret (Haer. fab. i. 4), Augustine (Haer. 4), and 'Praedestinatus' (i. 3), have no independent value. It is evident from these particulars that Abrasax was the name of the first of the 365 Archons, and accordingly stood below Sophia and Dynamis and their progenitors; but his position is not expressly stated, so that the writer of the supplement to Tertullian had some excuse for confusing him with "the Supreme God". As an aeon With the availability of primary sources, such as those in the Nag Hammadi library, the identity of Abrasax remains unclear. The Holy Book of the Great Invisible Spirit, for instance, refers to Abrasax as an Aeon dwelling with Sophia and other Aeons of the Pleroma in the light of the luminary Eleleth. In several texts, the luminary Eleleth is the last of the luminaries (Spiritual Lights) that come forward, and it is the Aeon Sophia, associated with Eleleth, who encounters darkness and becomes involved in the chain of events that leads to the Demiurge's rule of this world, and the salvage effort that ensues. As such, the role of Aeons of Eleleth, including Abraxas, Sophia, and others, pertains to this outer border of the Pleroma that encounters the ignorance of the world of Lack and interacts to rectify the error of ignorance in the world of materiality. As a demon The Catholic church later deemed Abraxas a pagan god, and ultimately branded him a demon as documented in J. Collin de Plancy's Infernal Dictionary, Abraxas (or Abracax) is labeled the "supreme God" of the Basilidians, whom he describes as "heretics of the second century". He further indicated the Basilidians attributed to Abraxas the rule over "365 skies" and "365 virtues". In a final statement on Basilidians, de Plancy states that their view was that Jesus Christ was merely a "benevolent ghost sent on Earth by Abraxas". Abraxas stones A vast number of engraved stones are in existence, to which the name "Abraxas-stones" has long been given. One particularly fine example was included as part of the Thetford treasure from fourth century Norfolk, England. The subjects are mythological, and chiefly grotesque, with various inscriptions, in which ΑΒΡΑΣΑΞ often occurs, alone or with other words. Sometimes the whole space is taken up with the inscription. In certain obscure magical writings of Egyptian origin ἀβραξάς or ἀβρασάξ is found associated with other names which frequently accompany it on gems; it is also found on the Greek metal tesseræ among other mystic words. The meaning of the legends is seldom intelligible: but some of the gems are amulets; and the same may be the case with nearly all. The Abrasax-image alone, without external Iconisms, and either without, or but a simple, inscription. The Abrasax-imago proper is usually found with a shield, a sphere or wreath and whip, a sword or sceptre, a cock's head, the body clad with armor, and a serpent's tail. There are, however, innumerable modifications of these figures: Lions', hawks', and eagles' skins, with or without mottos, with or without a trident and star, and with or without reverses. Abrasax combined with other Gnostic Powers. If, in a single instance, this supreme being was represented in connection with powers of subordinate rank, nothing could have been more natural than to represent it also in combination with its emanations, the seven superior spirits, the thirty Aeons, and the three hundred and sixty-five cosmical Genii; and yet this occurs upon none of the relics as yet discovered, whilst those with Powers not belonging to the Gnostic system are frequently met with. Abrasax with Jewish symbols. This combination predominates, not indeed with symbolical figures, but in the form of inscriptions, such as: Iao, Eloai, Adonai, Sabaoth, Michael, Gabriel, Uriel, Onoel, Ananoel, Raphael, Japlael, and many others. The name ΙΑΩ, to which ΣΑΒΑΩΘ is sometimes added, is found with this figure even more frequently than ΑΒΡΑΣΑΞ, and they are often combined. Beside an Abrasax figure the following, for instance, is found: ΙΑΩ ΑΒΡΑΣΑΞ ΑΔΩΝ ΑΤΑ, "Iao Abrasax, thou art the Lord". With the Abrasax-shield are also found the divine names Sabaoth Iao, Iao Abrasax, Adonai Abrasax, etc. Abrasax with Persian deities. Chiefly, perhaps exclusively, in combination with Mithras, and possibly a few specimens with the mystical gradations of mithriaca, upon Gnostic relics. Abrasax with Egyptian deities. It is represented as a figure, with the sun-god Phre leading his chariot, or standing upon a lion borne by a crocodile; also as a name, in connection with Isis, Phtha, Neith, Athor, Thot, Anubis, Horus, and Harpocrates in a Lotus-leaf; also with a representation of the Nile, the symbol of prolificacy, with Agathodaemon (Chnuphis), or with scarabs, the symbols of the revivifying energies of nature. Abrasax with Grecian deities, sometimes as a figure, and again with the simple name, in connection with the planets, especially Venus, Hecate, and Zeus, richly engraved. Simple or ornamental representations of the journey of departed spirits through the starry world to Amenti, borrowed, as those above-named, from the Egyptian religion. The spirit wafted from the earth, either with or without the corpse, and transformed at times into Osiris or Helios, is depicted as riding upon the back of a crocodile, or lion, guided in some instances by Anubis, and other genii, and surrounded by stars; and thus attended hastening to judgment and a higher life. Representations of the judgment, which, like the preceding, are either ornamental or plain, and imitations of Egyptian art, with slight modifications and prominent symbols, as the vessel in which Anubis weighs the human heart, as comprehending the entire life of man, with all its errors. Worship and consecrating services were, according to the testimony of Origen in his description of the ophitic diagram, conducted with figurative representations in the secret assemblies of the Gnostics unless indeed the statement on which this opinion rests designates, as it readily may, a statue of glyptic workmanship. It is uncertain if any of the discovered specimens actually represent the Gnostic cultus and religious ceremonies, although upon some may be seen an Abrasax-figure laying its hand upon a person kneeling, as though for baptism or benediction. Astrological groups. The Gnostics referred everything to astrology. Even the Bardesenists located the inferior powers, the seven, twelve and thirty-six, among the planets, in the zodiac and starry region, as rulers of the celestial phenomena which influence the earth and its inhabitants. Birth and health, wealth and allotment, are considered to be mainly under their control. Other sects betray still stronger partiality for astrological conceits. Many of these specimens also are improperly ascribed to Gnosticism, but the Gnostic origin of others is too manifest to allow of contradiction. Inscriptions, of which there are three kinds: Those destitute of symbols or iconisms, engraved upon stone, iron, lead and silver plates, in Greek, Latin, Coptic or other languages, of amuletic import, and in the form of prayers for health and protection. Those with some symbol, as a serpent in an oval form. Those with iconisms, at times very small, but often made the prominent object, so that the legend is limited to a single word or name. Sometimes the legends are as important as the images. It is remarkable, however, that thus far none of the plates or medals found seem to have any of the forms or prayers reported by Origen. It is necessary to distinguish those specimens that belong to the proper Gnostic period from such as are indisputably of later origin, especially since there is a strong temptation to place those of more recent date among the older class. Gallery Anguipede In a great majority of instances the name Abrasax is associated with a singular composite figure, having a Chimera-like appearance somewhat resembling a basilisk or the Greek primordial god Chronos (not to be confused with the Greek titan Cronus). According to E. A. Wallis Budge, "as a Pantheus, i.e. All-God, he appears on the amulets with the head of a cock (Phœbus) or of a lion (Ra or Mithras), the body of a man, and his legs are serpents which terminate in scorpions, types of the Agathodaimon. In his right hand he grasps a club, or a flail, and in his left is a round or oval shield." This form was also referred to as the Anguipede. Budge surmised that Abrasax was "a form of the Adam Kadmon of the Kabbalists and the Primal Man whom God made in His own image". Some parts at least of the figure mentioned above are solar symbols, and the Basilidian Abrasax is manifestly connected with the sun. J. J. Bellermann has speculated that "the whole represents the Supreme Being, with his Five great Emanations, each one pointed out by means of an expressive emblem. Thus, from the human body, the usual form assigned to the Deity, forasmuch as it is written that God created man in his own image, issue the two supporters, Nous and Logos, symbols of the inner sense and the quickening understanding, as typified by the serpents, for the same reason that had induced the old Greeks to assign this reptile for an attribute to Pallas. His head—a cock's—represents Phronesis, the fowl being emblematical of foresight and vigilance. His two hands bear the badges of Sophia and Dynamis, the shield of Wisdom, and the scourge of Power." Origin In the absence of other evidence to show the origin of these curious relics of antiquity the occurrence of a name known as Basilidian on patristic authority has not unnaturally been taken as a sufficient mark of origin, and the early collectors and critics assumed this whole group to be the work of Gnostics. During the last three centuries attempts have been made to sift away successively those gems that had no claim to be considered in any sense Gnostic, or specially Basilidian, or connected with Abrasax. The subject is one which has exercised the ingenuity of many savants, but it may be said that all the engraved stones fall into three classes: Abrasax, or stones of Basilidian origin Abrasaxtes, or stones originating in ancient forms of worship and adapted by the Gnostics Abraxoïdes, or stones absolutely unconnected with the doctrine of Basilides While it would be rash to assert positively that no existing gems were the work of Gnostics, there is no valid reason for attributing all of them to such an origin. The fact that the name occurs on these gems in connection with representations of figures with the head of a cock, a lion, or an ass, and the tail of a serpent was formerly taken in the light of what Irenaeus says about the followers of Basilides: Incantations by mystic names were characteristic of the hybrid Gnosticism planted in Spain and southern Gaul at the end of the fourth century and at the beginning of the fifth, which Jerome connects with Basilides and which (according to his Epist., lxxv.) used the name Abrasax. It is therefore not unlikely that some Gnostics used amulets, though the confident assertions of modern writers to this effect rest on no authority. Isaac de Beausobre properly calls attention to the significant silence of Clement in the two passages in which he instructs the Christians of Alexandria on the right use of rings and gems, and the figures which may legitimately be engraved on them (Paed. 241 ff.; 287 ff.). But no attempt to identify the figures on existing gems with the personages of Gnostic mythology has had any success, and Abrasax is the only Gnostic term found in the accompanying legends that is not known to belong to other religions or mythologies. The present state of the evidence therefore suggests that their engravers and the Basilidians received the mystic name from a common source now unknown. Magical papyri Having due regard to the magic papyri, in which many of the unintelligible names of the Abrasax-stones reappear, besides directions for making and using gems with similar figures and formulas for magical purposes, it can scarcely be doubted that many of these stones are pagan amulets and instruments of magic. The magic papyri reflect the same ideas as the Abrasax-gems and often bear Hebraic names of God. The following example is illustrative: "I conjure you by Iaō Sabaōth Adōnai Abrasax, and by the great god, Iaeō". The patriarchs are sometimes addressed as deities; for which fact many instances may be adduced. In the group "Iakoubia, Iaōsabaōth Adōnai Abrasax", the first name seems to be composed of Jacob and Ya. Similarly, entities considered angels in Judaism are invoked as gods alongside Abrasax: thus "I conjure you ... by the god Michaēl, by the god Souriēl, by the god Gabriēl, by the god Raphaēl, by the god Abrasax Ablathanalba Akrammachari ...". In text PGM V. 96-172, Abrasax is identified as part of the "true name which has been transmitted to the prophets of Israel" of the "Headless One, who created heaven and earth, who created night and day ... Osoronnophris whom none has ever seen ... awesome and invisible god with an empty spirit"; the name also includes Iaō and Adōnai. "Osoronnophris" represents Egyptian Wsir Wn-nfr, "Osiris the Perfect Being". Another identification with Osiris is made in PGM VII. 643-51: "you are not wine, but the guts of Osiris, the guts of ... Ablanathanalba Akrammachamarei Eee, who has been stationed over necessity, Iakoub Ia Iaō Sabaōth Adōnai Abrasax." PGM VIII. 1-63, on the other hand, identifies Abrasax as a name of "Hermes" (i.e. Thoth). Here the numerological properties of the name are invoked, with its seven letters corresponding to the seven planets and its isopsephic value of 365 corresponding to the days of the year. Thoth is also identified with Abrasax in PGM LXXIX. 1-7: "I am the soul of darkness, Abrasax, the eternal one, Michaēl, but my true name is Thōouth, Thōouth." One papyrus titled the "Monad" or the "Eighth Book of Moses" (PGM XIII. 1–343) contains an invocation to a supreme creator God; Abrasax is given as being the name of this God in the language of the baboons. The papyrus goes on to describe a cosmogonic myth about Abrasax, describing how he created the Ogdoad by laughing. His first laughter created light; his second divided the primordial waters; his third created the mind; his fourth created fertility and procreation; his fifth created fate; his sixth created time (as the sun and moon); and his seventh and final laughter created the soul. Then, from various sounds made by Abrasax, there arose the serpent Python who "foreknew all things", the first man (or Fear), and the god Iaō, "who is lord of all". The man fought with Iaō, and Abrasax declared that Iaō's power would derive from both of the others, and that Iaō would take precedence over all the other gods. This text also describes Helios as an archangel of God/Abrasax. The Leyden Papyrus recommends that this invocation be pronounced to the moon: The magic word "Ablanathanalba", which reads in Greek the same backward as forward, also occurs in the Abrasax-stones as well as in the magic papyri. This word is usually conceded to be derived from the Hebrew (Aramaic), meaning "Thou art our father" (אב לן את), and also occurs in connection with Abrasax; the following inscription is found upon a metal plate in the Karlsruhe Museum: In literature In popular culture In the 2022 folk horror video game The Excavation of Hob's Barrow, published by Wadjet Eye Games, Abraxas features as a long-dormant god/demon inspired by the original Gnostic Mythology. In Marvel comics, the character Abraxas embodies the destruction of the multiverse (first appearance: 2001). "Mt. Abraxas" is the title of the first track of occult rock band Uncle Acid & the Deadbeats's third studio album Mind Control (2013). Abraxas appears as a demon in Charmed season 2 (1999–2000). Abraxas appears as a demon in Supernatural season 14 (2018–2019). In the 2008 visual novel 11eyes: Tsumi to Batsu to Aganai no Shōjo, Kukuri can summon her soul in the form of a chained guardian angel named Abraxas. When released from his chains, he becomes a godlike entity named Demiurge. The 2018 video game Darksiders III features a demon named Abraxis. South Korean band BTS's videos frequently mention Abraxas and much of their storyline is based around the deity. In 1970, the second studio album of Latin rock band Santana was named Abraxas, derived from a passage in the Hermann Hesse novel Demian. In 1987 The Abraxas Foundation was founded by Boyd Rice as a Social Darwinist think tank. In the 2018 thriller Mandy, the "horn of Abraxas" is a sort of stone flute with magical properties. Brother Swan uses it to summon the Black Skulls, a demonic biker gang. In the 2019 role-playing game Fire Emblem: Three Houses, Abraxas is the name of a damage-dealing Faith spell. On their 2004 album Lemuria, symphonic metal band Therion has a track titled Abraxas, with lyrics delving into the Gnostic mythologies of the word. In the 2010 song "Lead Poisoning" by Alkaline Trio, Matt Skiba sings the line "Now I pray to Abraxas my soul to keep". In season 1, episode 2 of Netflix's 2020 animated show The Midnight Gospel the main character, Clancy Gilroy, purchases an avatar named Braxis, which he then uses to explore alternate universes. Braxis looks like the traditional images of Abraxas where the creature has a human body and the head of a rooster. Like the traditional images, Braxis has serpents for legs and his arms are also like those in traditional representations. In the 2018 video game Assassin's Creed Odyssey, Abraxas is the name of the legendary fiery horse the player acquires if they reach the Tier 1 level in the hierarchy of mercenaries. In J. K. Rowling's Harry Potter series (1997–2007), Abraxas is the name of Lucius Malfoy's father, as well as the name of a race of winged horses in the same fictional world. In the 2015 sci-fi/action movie Jupiter Ascending, the most powerful family in the Cosmos known as the House of Abrasax. Abraxas, in the Gnostic role of Great Archon, is the antagonist of the 2021 video game Cruelty Squad. In the 2021 TV-adaptation of Isaac Asimov's Foundation series, the Abraxas Conjecture is the name of the mathematical proof that Gaal Dornick solves using Kalle's Ninth Proof of Folding. In Sarah J. Maas' Throne of Glass series (2014–2018), the similarly-named Abraxos is the wyvern mount of Manon Blackbeak. In the 1992 Discworld novel Small Gods by Terry Pratchett, Abraxas was an Ephebian philosopher who wrote about the nature of gods in his scroll On Religion, theorising that gods died if belief in them is diverted towards a rigid, hierarchical church structure, as had nearly happened with the Great God Om due to fear of the Omnian Quisition. Having survived being struck by lightning fifteen times as a result, he earned the nickname 'Charcoal'. In the Shin Megami Tensei video game franchise (first release: 1987), Abraxas is a demon. In the 1997 animated series Revolutionary Girl Utena by animation studio Be-Papas, Abraxas is referenced in the series soundtrack. The title being; "The God's Name Is Abraxas". In the 1999 movie Adolescence of Utena by animation studio Be-Papas, Abraxas is referenced in the film's soundtrack. The title of the song being; "Abraxas ~ Sunny Garden". In 2019, electronic music producers Seven Lions and Dimibo formed a psytrance trio called “Abraxis.” The project consists of a back story in which Reginald Abraxis formed the Abraxis Institute, in order to help people explore their full potential and achieve self-actualization. In the 2022 song 'Nihilistic Violence' by American Technical Death Metal band Revocation, third track on the album 'Netherheaven', the lyric "Hear the bellowing horn of Abraxas, it calls to the beast that lives in the heart of every man" appears at 1:10. This is most likely a reference to the Horn of Abraxas that features in the movie Mandy. In architecture Les Espaces d'Abraxas is a high-density housing complex in Noisy-le-Grand near Paris, France designed by Spanish architect Ricardo Bofill and opened in 1983. See also Arimanius Chronos Sator Square References Citations Works cited General references Wendelin, in a letter in Idem, Abraxas in Herzog, RE, 2d ed., 1877. Idem, Appendice alla dissertazione sugli Abraxas, ib. 1874. Harnack, Geschichte, i. 161. The older material is listed by Matter, ut sup., and Wessely, Ephesia grammata, vol. ii., Vienna, 1886. Eng. transl., 10 vols., London, 1721–2725. Attribution Further reading External links The complete texts of Carl Jung's "The Seven Sermons To The Dead" Abraxas article from The Mystica Gnostic deities Magic words Mythological hybrids Names of God in Gnosticism Theophoric names

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https://en.wikipedia.org/wiki/APL%20%28programming%20language%29

APL (programming language)

APL (named after the book A Programming Language) is a programming language developed in the 1960s by Kenneth E. Iverson. Its central datatype is the multidimensional array. It uses a large range of special graphic symbols to represent most functions and operators, leading to very concise code. It has been an important influence on the development of concept modeling, spreadsheets, functional programming, and computer math packages. It has also inspired several other programming languages. History Mathematical notation A mathematical notation for manipulating arrays was developed by Kenneth E. Iverson, starting in 1957 at Harvard University. In 1960, he began work for IBM where he developed this notation with Adin Falkoff and published it in his book A Programming Language in 1962. The preface states its premise: This notation was used inside IBM for short research reports on computer systems, such as the Burroughs B5000 and its stack mechanism when stack machines versus register machines were being evaluated by IBM for upcoming computers. Iverson also used his notation in a draft of the chapter A Programming Language, written for a book he was writing with Fred Brooks, Automatic Data Processing, which would be published in 1963. In 1979, Iverson received the Turing Award for his work on APL. Development into a computer programming language As early as 1962, the first attempt to use the notation to describe a complete computer system happened after Falkoff discussed with William C. Carter his work to standardize the instruction set for the machines that later became the IBM System/360 family. In 1963, Herbert Hellerman, working at the IBM Systems Research Institute, implemented a part of the notation on an IBM 1620 computer, and it was used by students in a special high school course on calculating transcendental functions by series summation. Students tested their code in Hellerman's lab. This implementation of a part of the notation was called Personalized Array Translator (PAT). In 1963, Falkoff, Iverson, and Edward H. Sussenguth Jr., all working at IBM, used the notation for a formal description of the IBM System/360 series machine architecture and functionality, which resulted in a paper published in IBM Systems Journal in 1964. After this was published, the team turned their attention to an implementation of the notation on a computer system. One of the motivations for this focus of implementation was the interest of John L. Lawrence who had new duties with Science Research Associates, an educational company bought by IBM in 1964. Lawrence asked Iverson and his group to help use the language as a tool to develop and use computers in education. After Lawrence M. Breed and Philip S. Abrams of Stanford University joined the team at IBM Research, they continued their prior work on an implementation programmed in FORTRAN IV for a part of the notation which had been done for the IBM 7090 computer running on the IBSYS operating system. This work was finished in late 1965 and later named IVSYS (for Iverson system). The basis of this implementation was described in detail by Abrams in a Stanford University Technical Report, "An Interpreter for Iverson Notation" in 1966. The academic aspect of this was formally supervised by Niklaus Wirth. Like Hellerman's PAT system earlier, this implementation did not include the APL character set but used special English reserved words for functions and operators. The system was later adapted for a time-sharing system and, by November 1966, it had been reprogrammed for the IBM System/360 Model 50 computer running in a time-sharing mode and was used internally at IBM. Hardware A key development in the ability to use APL effectively, before the wide use of cathode ray tube (CRT) terminals, was the development of a special IBM Selectric typewriter interchangeable typing element with all the special APL characters on it. This was used on paper printing terminal workstations using the Selectric typewriter and typing element mechanism, such as the IBM 1050 and IBM 2741 terminal. Keycaps could be placed over the normal keys to show which APL characters would be entered and typed when that key was struck. For the first time, a programmer could type in and see proper APL characters as used in Iverson's notation and not be forced to use awkward English keyword representations of them. Falkoff and Iverson had the special APL Selectric typing elements, 987 and 988, designed in late 1964, although no APL computer system was available to use them. Iverson cited Falkoff as the inspiration for the idea of using an IBM Selectric typing element for the APL character set. Many APL symbols, even with the APL characters on the Selectric typing element, still had to be typed in by over-striking two extant element characters. An example is the grade up character, which had to be made from a delta (shift-H) and a Sheffer stroke (shift-M). This was necessary because the APL character set was much larger than the 88 characters allowed on the typing element, even when letters were restricted to upper-case (capitals). Commercial availability The first APL interactive login and creation of an APL workspace was in 1966 by Larry Breed using an IBM 1050 terminal at the IBM Mohansic Labs near Thomas J. Watson Research Center, the home of APL, in Yorktown Heights, New York. IBM was chiefly responsible for introducing APL to the marketplace. The first publicly available version of APL was released in 1968 for the IBM 1130. IBM provided APL\1130 for free but without liability or support. It would run in as little as 8k 16-bit words of memory, and used a dedicated 1 megabyte hard disk. APL gained its foothold on mainframe timesharing systems from the late 1960s through the early 1980s, in part because it would support multiple users on lower-specification systems that had no dynamic address translation hardware. Additional improvements in performance for selected IBM System/370 mainframe systems included the APL Assist Microcode in which some support for APL execution was included in the processor's firmware, as distinct from being implemented entirely by higher-level software. Somewhat later, as suitably performing hardware was finally growing available in the mid- to late-1980s, many users migrated their applications to the personal computer environment. Early IBM APL interpreters for IBM 360 and IBM 370 hardware implemented their own multi-user management instead of relying on the host services, thus they were their own timesharing systems. First introduced for use at IBM in 1966, the APL\360 system was a multi-user interpreter. The ability to programmatically communicate with the operating system for information and setting interpreter system variables was done through special privileged "I-beam" functions, using both monadic and dyadic operations. In 1973, IBM released APL.SV, which was a continuation of the same product, but which offered shared variables as a means to access facilities outside of the APL system, such as operating system files. In the mid-1970s, the IBM mainframe interpreter was even adapted for use on the IBM 5100 desktop computer, which had a small CRT and an APL keyboard, when most other small computers of the time only offered BASIC. In the 1980s, the VSAPL program product enjoyed wide use with Conversational Monitor System (CMS), Time Sharing Option (TSO), VSPC, MUSIC/SP, and CICS users. In 1973–1974, Patrick E. Hagerty directed the implementation of the University of Maryland APL interpreter for the 1100 line of the Sperry UNIVAC 1100/2200 series mainframe computers. In 1974, student Alan Stebbens was assigned the task of implementing an internal function. Xerox APL was available from June 1975 for Xerox 560 and Sigma 6, 7, and 9 mainframes running CP-V and for Honeywell CP-6. In the 1960s and 1970s, several timesharing firms arose that sold APL services using modified versions of the IBM APL\360 interpreter. In North America, the better-known ones were IP Sharp Associates, Scientific Time Sharing Corporation (STSC), Time Sharing Resources (TSR), and The Computer Company (TCC). CompuServe also entered the market in 1978 with an APL Interpreter based on a modified version of Digital Equipment Corp and Carnegie Mellon's, which ran on DEC's KI and KL 36-bit machines. CompuServe's APL was available both to its commercial market and the consumer information service. With the advent first of less expensive mainframes such as the IBM 4300, and later the personal computer, by the mid-1980s, the timesharing industry was all but gone. Sharp APL was available from IP Sharp Associates, first as a timesharing service in the 1960s, and later as a program product starting around 1979. Sharp APL was an advanced APL implementation with many language extensions, such as packages (the ability to put one or more objects into a single variable), a file system, nested arrays, and shared variables. APL interpreters were available from other mainframe and mini-computer manufacturers also, notably Burroughs, Control Data Corporation (CDC), Data General, Digital Equipment Corporation (DEC), Harris, Hewlett-Packard (HP), Siemens, Xerox and others. Garth Foster of Syracuse University sponsored regular meetings of the APL implementers' community at Syracuse's Minnowbrook Conference Center in Blue Mountain Lake, New York. In later years, Eugene McDonnell organized similar meetings at the Asilomar Conference Grounds near Monterey, California, and at Pajaro Dunes near Watsonville, California. The SIGAPL special interest group of the Association for Computing Machinery continues to support the APL community. Microcomputers On microcomputers, which became available from the mid-1970s onwards, BASIC became the dominant programming language. Nevertheless, some microcomputers provided APL instead – the first being the Intel 8008-based MCM/70 which was released in 1974 and which was primarily used in education. Another machine of this time was the VideoBrain Family Computer, released in 1977, which was supplied with its dialect of APL called APL/S. The Commodore SuperPET, introduced in 1981, included an APL interpreter developed by the University of Waterloo. In 1976, Bill Gates claimed in his Open Letter to Hobbyists that Microsoft Corporation was implementing APL for the Intel 8080 and Motorola 6800 but had "very little incentive to make [it] available to hobbyists" because of software piracy. It was never released. APL2 Starting in the early 1980s, IBM APL development, under the leadership of Jim Brown, implemented a new version of the APL language that contained as its primary enhancement the concept of nested arrays, where an array can contain other arrays, and new language features which facilitated integrating nested arrays into program workflow. Ken Iverson, no longer in control of the development of the APL language, left IBM and joined I. P. Sharp Associates, where one of his major contributions was directing the evolution of Sharp APL to be more in accord with his vision. APL2 was first released for CMS and TSO in 1984. The APL2 Workstation edition (Windows, OS/2, AIX, Linux, and Solaris) followed later. As other vendors were busy developing APL interpreters for new hardware, notably Unix-based microcomputers, APL2 was almost always the standard chosen for new APL interpreter developments. Even today, most APL vendors or their users cite APL2 compatibility as a selling point for those products. IBM cites its use for problem solving, system design, prototyping, engineering and scientific computations, expert systems, for teaching mathematics and other subjects, visualization and database access. Modern implementations Various implementations of APL by APLX, Dyalog, et al., include extensions for object-oriented programming, support for .NET, XML-array conversion primitives, graphing, operating system interfaces, and lambda calculus expressions. Freeware versions include GNU APL for Linux and NARS2000 for Windows (which runs on Linux under Wine). Both of these are fairly complete versions of APL2 with various language extensions. Derivative languages APL has formed the basis of, or influenced, the following languages: A and A+, an alternative APL, the latter with graphical extensions. FP, a functional programming language. Ivy, an interpreter for an APL-like language developed by Rob Pike, and which uses ASCII as input. J, which was also designed by Iverson, and which uses ASCII with digraphs instead of special symbols. K, a proprietary variant of APL developed by Arthur Whitney. MATLAB, a numerical computation tool. Nial, a high-level array programming language with a functional programming notation. Polymorphic Programming Language, an interactive, extensible language with a similar base language. S, a statistical programming language (usually now seen in the open-source version known as R). Snap!, a low-code block-based programming language, born as an extended reimplementation of Scratch Speakeasy, a numerical computing interactive environment. Wolfram Language, the programming language of Mathematica. Language characteristics Character set APL has been criticized and praised for its choice of a unique, non-standard character set. In the 1960s and 1970s, few terminal devices or even displays could reproduce the APL character set. The most popular ones employed the IBM Selectric print mechanism used with a special APL type element. One of the early APL line terminals (line-mode operation only, not full screen) was the Texas Instruments TI Model 745 () with the full APL character set which featured half and full duplex telecommunications modes, for interacting with an APL time-sharing service or remote mainframe to run a remote computer job, called an RJE. Over time, with the universal use of high-quality graphic displays, printing devices and Unicode support, the APL character font problem has largely been eliminated. However, entering APL characters requires the use of input method editors, keyboard mappings, virtual/on-screen APL symbol sets, or easy-reference printed keyboard cards which can frustrate beginners accustomed to other programming languages. With beginners who have no prior experience with other programming languages, a study involving high school students found that typing and using APL characters did not hinder the students in any measurable way. In defense of APL, it requires fewer characters to type, and keyboard mappings become memorized over time. Special APL keyboards are also made and in use today, as are freely downloadable fonts for operating systems such as Microsoft Windows. The reported productivity gains assume that one spends enough time working in the language to make it worthwhile to memorize the symbols, their semantics, and keyboard mappings, not to mention a substantial number of idioms for common tasks. Design Unlike traditionally structured programming languages, APL code is typically structured as chains of monadic or dyadic functions, and operators acting on arrays. APL has many nonstandard primitives (functions and operators) that are indicated by a single symbol or a combination of a few symbols. All primitives are defined to have the same precedence, and always associate to the right. Thus, APL is read or best understood from right-to-left. Early APL implementations ( or so) had no programming loop-flow control structures, such as do or while loops, and if-then-else constructs. Instead, they used array operations, and use of structured programming constructs was often not necessary, since an operation could be performed on a full array in one statement. For example, the iota function (ι) can replace for-loop iteration: ιN when applied to a scalar positive integer yields a one-dimensional array (vector), 1 2 3 ... N. More recent implementations of APL generally include comprehensive control structures, so that data structure and program control flow can be clearly and cleanly separated. The APL environment is called a workspace. In a workspace the user can define programs and data, i.e., the data values exist also outside the programs, and the user can also manipulate the data without having to define a program. In the examples below, the APL interpreter first types six spaces before awaiting the user's input. Its own output starts in column one. The user can save the workspace with all values, programs, and execution status. APL uses a set of non-ASCII symbols, which are an extension of traditional arithmetic and algebraic notation. Having single character names for single instruction, multiple data (SIMD) vector functions is one way that APL enables compact formulation of algorithms for data transformation such as computing Conway's Game of Life in one line of code. In nearly all versions of APL, it is theoretically possible to express any computable function in one expression, that is, in one line of code. Because of the unusual character set, many programmers use special keyboards with APL keytops to write APL code. Although there are various ways to write APL code using only ASCII characters, in practice it is almost never done. (This may be thought to support Iverson's thesis about notation as a tool of thought.) Most if not all modern implementations use standard keyboard layouts, with special mappings or input method editors to access non-ASCII characters. Historically, the APL font has been distinctive, with uppercase italic alphabetic characters and upright numerals and symbols. Most vendors continue to display the APL character set in a custom font. Advocates of APL claim that the examples of so-called write-only code (badly written and almost incomprehensible code) are almost invariably examples of poor programming practice or novice mistakes, which can occur in any language. Advocates also claim that they are far more productive with APL than with more conventional computer languages, and that working software can be implemented in far less time and with far fewer programmers than using other technology. They also may claim that because it is compact and terse, APL lends itself well to larger-scale software development and complexity, because the number of lines of code can be reduced greatly. Many APL advocates and practitioners also view standard programming languages such as COBOL and Java as being comparatively tedious. APL is often found where time-to-market is important, such as with trading systems. Terminology APL makes a clear distinction between functions and operators. Functions take arrays (variables or constants or expressions) as arguments, and return arrays as results. Operators (similar to higher-order functions) take functions or arrays as arguments, and derive related functions. For example, the sum function is derived by applying the reduction operator to the addition function. Applying the same reduction operator to the maximum function (which returns the larger of two numbers) derives a function which returns the largest of a group (vector) of numbers. In the J language, Iverson substituted the terms verb for function and adverb or conjunction for operator. APL also identifies those features built into the language, and represented by a symbol, or a fixed combination of symbols, as primitives. Most primitives are either functions or operators. Coding APL is largely a process of writing non-primitive functions and (in some versions of APL) operators. However a few primitives are considered to be neither functions nor operators, most noticeably assignment. Some words used in APL literature have meanings that differ from those in both mathematics and the generality of computer science. Syntax APL has explicit representations of functions, operators, and syntax, thus providing a basis for the clear and explicit statement of extended facilities in the language, and tools to experiment on them. Examples Hello, world This displays "Hello, world": 'Hello, world'A design theme in APL is to define default actions in some cases that would produce syntax errors in most other programming languages. The 'Hello, world' string constant above displays, because display is the default action on any expression for which no action is specified explicitly (e.g. assignment, function parameter). Exponentiation Another example of this theme is that exponentiation in APL is written as , which indicates raising 2 to the power 3 (this would be written as or in some languages, or relegated to a function call such as in others). Many languages use to signify multiplication, as in , but APL chooses to use . However, if no base is specified (as with the statement in APL, or in other languages), most programming languages one would see this as a syntax error. APL, however, assumes the missing base to be the natural logarithm constant e, and interprets as . Simple statistics Suppose that is an array of numbers. Then gives its average. Reading right-to-left, gives the number of elements in X, and since is a dyadic operator, the term to its left is required as well. It is surrounded by parentheses since otherwise X would be taken (so that the summation would be of —each element of X divided by the number of elements in X), and gives the sum of the elements of X. Building on this, the following expression computes standard deviation: Naturally, one would define this expression as a function for repeated use rather than rewriting it each time. Further, since assignment is an operator, it can appear within an expression, so the following would place suitable values into T, AV and SD: Pick 6 lottery numbers This following immediate-mode expression generates a typical set of Pick 6 lottery numbers: six pseudo-random integers ranging from 1 to 40, guaranteed non-repeating, and displays them sorted in ascending order: x[⍋x←6?40] The above does a lot, concisely, although it may seem complex to a new APLer. It combines the following APL functions (also called primitives and glyphs): The first to be executed (APL executes from rightmost to leftmost) is dyadic function ? (named deal when dyadic) that returns a vector consisting of a select number (left argument: 6 in this case) of random integers ranging from 1 to a specified maximum (right argument: 40 in this case), which, if said maximum ≥ vector length, is guaranteed to be non-repeating; thus, generate/create 6 random integers ranging from 1 to 40. This vector is then assigned (←) to the variable x, because it is needed later. This vector is then sorted in ascending order by a monadic ⍋ function, which has as its right argument everything to the right of it up to the next unbalanced close-bracket or close-parenthesis. The result of ⍋ is the indices that will put its argument into ascending order. Then the output of ⍋ is used to index the variable x, which we saved earlier for this purpose, thereby selecting its items in ascending sequence. Since there is no function to the left of the left-most x to tell APL what to do with the result, it simply outputs it to the display (on a single line, separated by spaces) without needing any explicit instruction to do that. ? also has a monadic equivalent called roll, which simply returns one random integer between 1 and its sole operand [to the right of it], inclusive. Thus, a role-playing game program might use the expression ?20 to roll a twenty-sided die. Prime numbers The following expression finds all prime numbers from 1 to R. In both time and space, the calculation complexity is (in Big O notation). (~R∊R∘.×R)/R←1↓⍳R Executed from right to left, this means: Iota ⍳ creates a vector containing integers from 1 to R (if R= 6 at the start of the program, ⍳R is 1 2 3 4 5 6) Drop first element of this vector (↓ function), i.e., 1. So 1↓⍳R is 2 3 4 5 6 Set R to the new vector (←, assignment primitive), i.e., 2 3 4 5 6 The / replicate operator is dyadic (binary) and the interpreter first evaluates its left argument (fully in parentheses): Generate outer product of R multiplied by R, i.e., a matrix that is the multiplication table of R by R (°.× operator), i.e., Build a vector the same length as R with 1 in each place where the corresponding number in R is in the outer product matrix (∈, set inclusion or element of or Epsilon operator), i.e., 0 0 1 0 1 Logically negate (not) values in the vector (change zeros to ones and ones to zeros) (∼, logical not or Tilde operator), i.e., 1 1 0 1 0 Select the items in R for which the corresponding element is 1 (/ replicate operator), i.e., 2 3 5 (Note, this assumes the APL origin is 1, i.e., indices start with 1. APL can be set to use 0 as the origin, so that ι6 is 0 1 2 3 4 5, which is convenient for some calculations.) Sorting The following expression sorts a word list stored in matrix X according to word length: X[⍋X+.≠' ';] Game of Life The following function "life", written in Dyalog APL, takes a boolean matrix and calculates the new generation according to Conway's Game of Life. It demonstrates the power of APL to implement a complex algorithm in very little code, but understanding it requires some advanced knowledge of APL (as the same program would in many languages). life ← {⊃1 ⍵ ∨.∧ 3 4 = +/ +⌿ ¯1 0 1 ∘.⊖ ¯1 0 1 ⌽¨ ⊂⍵} HTML tags removal In the following example, also Dyalog, the first line assigns some HTML code to a variable txt and then uses an APL expression to remove all the HTML tags (explanation): txt←'<html><body><p>This is <em>emphasized</em> text.</p></body></html>' {⍵ /⍨ ~{⍵∨≠\⍵}⍵∊'<>'} txt This is emphasized text. Naming APL derives its name from the initials of Iverson's book A Programming Language, even though the book describes Iverson's mathematical notation, rather than the implemented programming language described in this article. The name is used only for actual implementations, starting with APL\360. Adin Falkoff coined the name in 1966 during the implementation of APL\360 at IBM: APL is occasionally re-interpreted as Array Programming Language or Array Processing Language, thereby making APL into a backronym. Logo There has always been cooperation between APL vendors, and joint conferences were held on a regular basis from 1969 until 2010. At such conferences, APL merchandise was often handed out, featuring APL motifs or collection of vendor logos. Common were apples (as a pun on the similarity in pronunciation of apple and APL) and the code snippet which are the symbols produced by the classic APL keyboard layout when holding the APL modifier key and typing "APL". Despite all these community efforts, no universal vendor-agnostic logo for the programming language emerged. As popular programming languages increasingly have established recognisable logos, Fortran getting one in 2020, British APL Association launched a campaign in the second half of 2021, to establish such a logo for APL, and after a community election and multiple rounds of feedback, a logo was chosen in May 2022. Use APL is used for many purposes including financial and insurance applications, artificial intelligence, neural networks and robotics. It has been argued that APL is a calculation tool and not a programming language; its symbolic nature and array capabilities have made it popular with domain experts and data scientists who do not have or require the skills of a computer programmer. APL is well suited to image manipulation and computer animation, where graphic transformations can be encoded as matrix multiplications. One of the first commercial computer graphics houses, Digital Effects, produced an APL graphics product named Visions, which was used to create television commercials and animation for the 1982 film Tron. Latterly, the Stormwind boating simulator uses APL to implement its core logic, its interfacing to the rendering pipeline middleware and a major part of its physics engine. Today, APL remains in use in a wide range of commercial and scientific applications, for example investment management, asset management, health care, and DNA profiling, and by hobbyists. Notable implementations APL\360 The first implementation of APL using recognizable APL symbols was APL\360 which ran on the IBM System/360, and was completed in November 1966 though at that time remained in use only within IBM. In 1973 its implementors, Larry Breed, Dick Lathwell and Roger Moore, were awarded the Grace Murray Hopper Award from the Association for Computing Machinery (ACM). It was given "for their work in the design and implementation of APL\360, setting new standards in simplicity, efficiency, reliability and response time for interactive systems." In 1975, the IBM 5100 microcomputer offered APL\360 as one of two built-in ROM-based interpreted languages for the computer, complete with a keyboard and display that supported all the special symbols used in the language. Significant developments to APL\360 included CMS/APL, which made use of the virtual storage capabilities of CMS and APLSV, which introduced shared variables, system variables and system functions. It was subsequently ported to the IBM System/370 and VSPC platforms until its final release in 1983, after which it was replaced by APL2. APL\1130 In 1968, APL\1130 became the first publicly available APL system, created by IBM for the IBM 1130. It became the most popular IBM Type-III Library software that IBM released. APL*Plus and Sharp APL APL*Plus and Sharp APL are versions of APL\360 with added business-oriented extensions such as data formatting and facilities to store APL arrays in external files. They were jointly developed by two companies, employing various members of the original IBM APL\360 development team. The two companies were I. P. Sharp Associates (IPSA), an APL\360 services company formed in 1964 by Ian Sharp, Roger Moore and others, and STSC, a time-sharing and consulting service company formed in 1969 by Lawrence Breed and others. Together the two developed APL*Plus and thereafter continued to work together but develop APL separately as APL*Plus and Sharp APL. STSC ported APL*Plus to many platforms with versions being made for the VAX 11, PC and UNIX, whereas IPSA took a different approach to the arrival of the personal computer and made Sharp APL available on this platform using additional PC-XT/360 hardware. In 1993, Soliton Incorporated was formed to support Sharp APL and it developed Sharp APL into SAX (Sharp APL for Unix). , APL*Plus continues as APL2000 APL+Win. In 1985, Ian Sharp, and Dan Dyer of STSC, jointly received the Kenneth E. Iverson Award for Outstanding Contribution to APL. APL2 APL2 was a significant re-implementation of APL by IBM which was developed from 1971 and first released in 1984. It provides many additions to the language, of which the most notable is nested (non-rectangular) array support. The entire APL2 Products and Services Team was awarded the Iverson Award in 2007. In 2021, IBM sold APL2 to Log-On Software, who develop and sell the product as Log-On APL2. APLGOL In 1972, APLGOL was released as an experimental version of APL that added structured programming language constructs to the language framework. New statements were added for interstatement control, conditional statement execution, and statement structuring, as well as statements to clarify the intent of the algorithm. It was implemented for Hewlett-Packard in 1977. Dyalog APL Dyalog APL was first released by British company Dyalog Ltd. in 1983 and, , is available for AIX, Linux (including on the Raspberry Pi), macOS and Microsoft Windows platforms. It is based on APL2, with extensions to support object-oriented programming, functional programming, and tacit programming. Licences are free for personal/non-commercial use. In 1995, two of the development team – John Scholes and Peter Donnelly – were awarded the Iverson Award for their work on the interpreter. Gitte Christensen and Morten Kromberg were joint recipients of the Iverson Award in 2016. NARS2000 NARS2000 is an open-source APL interpreter written by Bob Smith, a prominent APL developer and implementor from STSC in the 1970s and 1980s. NARS2000 contains advanced features and new datatypes and runs natively on Microsoft Windows, and other platforms under Wine. It is named after a development tool from the 1980s, NARS (Nested Arrays Research System). APLX APLX is a cross-platform dialect of APL, based on APL2 and with several extensions, which was first released by British company MicroAPL in 2002. Although no longer in development or on commercial sale it is now available free of charge from Dyalog. York APL York APL was developed at the York University, Ontario around 1968, running on IBM 360 mainframes. One notable difference between it and APL\360 was that it defined the "shape" (ρ) of a scalar as 1 whereas APL\360 defined it as the more mathematically correct 0 — this made it easier to write functions that acted the same with scalars and vectors. GNU APL GNU APL is a free implementation of Extended APL as specified in ISO/IEC 13751:2001 and is thus an implementation of APL2. It runs on Linux, macOS, several BSD dialects, and on Windows (either using Cygwin for full support of all its system functions or as a native 64-bit Windows binary with some of its system functions missing). GNU APL uses Unicode internally and can be scripted. It was written by Jürgen Sauermann. Richard Stallman, founder of the GNU Project, was an early adopter of APL, using it to write a text editor as a high school student in the summer of 1969. Interpretation and compilation of APL APL is traditionally an interpreted language, having language characteristics such as weak variable typing not well suited to compilation. However, with arrays as its core data structure it provides opportunities for performance gains through parallelism, parallel computing, massively parallel applications, and very-large-scale integration (VLSI), and from the outset APL has been regarded as a high-performance language – for example, it was noted for the speed with which it could perform complicated matrix operations "because it operates on arrays and performs operations like matrix inversion internally". Nevertheless, APL is rarely purely interpreted and compilation or partial compilation techniques that are, or have been, used include the following: Idiom recognition Most APL interpreters support idiom recognition and evaluate common idioms as single operations. For example, by evaluating the idiom BV/⍳⍴A as a single operation (where BV is a Boolean vector and A is an array), the creation of two intermediate arrays is avoided. Optimised bytecode Weak typing in APL means that a name may reference an array (of any datatype), a function or an operator. In general, the interpreter cannot know in advance which form it will be and must therefore perform analysis, syntax checking etc. at run-time. However, in certain circumstances, it is possible to deduce in advance what type a name is expected to reference and then generate bytecode which can be executed with reduced run-time overhead. This bytecode can also be optimised using compilation techniques such as constant folding or common subexpression elimination. The interpreter will execute the bytecode when present and when any assumptions which have been made are met. Dyalog APL includes support for optimised bytecode. Compilation Compilation of APL has been the subject of research and experiment since the language first became available; the first compiler is considered to be the Burroughs APL-700 which was released around 1971. In order to be able to compile APL, language limitations have to be imposed. APEX is a research APL compiler which was written by Robert Bernecky and is available under the GNU Public License. The STSC APL Compiler is a hybrid of a bytecode optimiser and a compiler – it enables compilation of functions to machine code provided that its sub-functions and globals are declared, but the interpreter is still used as a runtime library and to execute functions which do not meet the compilation requirements. Standards APL has been standardized by the American National Standards Institute (ANSI) working group X3J10 and International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC), ISO/IEC Joint Technical Committee 1 Subcommittee 22 Working Group 3. The Core APL language is specified in ISO 8485:1989, and the Extended APL language is specified in ISO/IEC 13751:2001. References Further reading An APL Machine (1970 Stanford doctoral dissertation by Philip Abrams) A Personal History Of APL (1982 article by Michael S. Montalbano) A Programming Language by Kenneth E. Iverson APL in Exposition by Kenneth E. Iverson Brooks, Frederick P.; Kenneth Iverson (1965). Automatic Data Processing, System/360 Edition. . Video – a 1974 talk show style interview with the original developers of APL. – a 1975 live demonstration of APL by Professor Bob Spence, Imperial College London. – a 2009 tutorial by John Scholes of Dyalog Ltd. which implements Conway's Game of Life in a single line of APL. – a 2009 introduction to APL by Graeme Robertson. External links Online resources TryAPL.org, an online APL primer APL2C, a source of links to APL compilers .NET programming languages APL programming language family Array programming languages Command shells Dynamic programming languages Dynamically typed programming languages Functional languages IBM software Programming languages created in 1964 Programming languages with an ISO standard Programming languages Homoiconic programming languages

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https://en.wikipedia.org/wiki/AWK

AWK

AWK (awk ) is a domain-specific language designed for text processing and typically used as a data extraction and reporting tool. Like sed and grep, it is a filter, and is a standard feature of most Unix-like operating systems. The AWK language is a data-driven scripting language consisting of a set of actions to be taken against streams of textual data – either run directly on files or used as part of a pipeline – for purposes of extracting or transforming text, such as producing formatted reports. The language extensively uses the string datatype, associative arrays (that is, arrays indexed by key strings), and regular expressions. While AWK has a limited intended application domain and was especially designed to support one-liner programs, the language is Turing-complete, and even the early Bell Labs users of AWK often wrote well-structured large AWK programs. AWK was created at Bell Labs in the 1970s, and its name is derived from the surnames of its authors: Alfred Aho, Peter Weinberger, and Brian Kernighan. The acronym is pronounced the same as the name of the bird species auk, which is illustrated on the cover of The AWK Programming Language. When written in all lowercase letters, as awk, it refers to the Unix or Plan 9 program that runs scripts written in the AWK programming language. History AWK was initially developed in 1977 by Alfred Aho (author of egrep), Peter J. Weinberger (who worked on tiny relational databases), and Brian Kernighan. AWK takes its name from their respective initials. According to Kernighan, one of the goals of AWK was to have a tool that would easily manipulate both numbers and strings. AWK was also inspired by Marc Rochkind's programming language that was used to search for patterns in input data, and was implemented using yacc. As one of the early tools to appear in Version 7 Unix, AWK added computational features to a Unix pipeline besides the Bourne shell, the only scripting language available in a standard Unix environment. It is one of the mandatory utilities of the Single UNIX Specification, and is required by the Linux Standard Base specification. AWK was significantly revised and expanded in 1985–88, resulting in the GNU AWK implementation written by Paul Rubin, Jay Fenlason, and Richard Stallman, released in 1988. GNU AWK may be the most widely deployed version because it is included with GNU-based Linux packages. GNU AWK has been maintained solely by Arnold Robbins since 1994. Brian Kernighan's nawk (New AWK) source was first released in 1993 unpublicized, and publicly since the late 1990s; many BSD systems use it to avoid the GPL license. AWK was preceded by sed (1974). Both were designed for text processing. They share the line-oriented, data-driven paradigm, and are particularly suited to writing one-liner programs, due to the implicit main loop and current line variables. The power and terseness of early AWK programs – notably the powerful regular expression handling and conciseness due to implicit variables, which facilitate one-liners – together with the limitations of AWK at the time, were important inspirations for the Perl language (1987). In the 1990s, Perl became very popular, competing with AWK in the niche of Unix text-processing languages. Structure of AWK programs An AWK program is a series of pattern action pairs, written as: condition { action } condition { action } ... where condition is typically an expression and action is a series of commands. The input is split into records, where by default records are separated by newline characters so that the input is split into lines. The program tests each record against each of the conditions in turn, and executes the action for each expression that is true. Either the condition or the action may be omitted. The condition defaults to matching every record. The default action is to print the record. This is the same pattern-action structure as sed. In addition to a simple AWK expression, such as foo == 1 or /^foo/, the condition can be BEGIN or END causing the action to be executed before or after all records have been read, or pattern1, pattern2 which matches the range of records starting with a record that matches pattern1 up to and including the record that matches pattern2 before again trying to match against pattern1 on subsequent lines. In addition to normal arithmetic and logical operators, AWK expressions include the tilde operator, ~, which matches a regular expression against a string. As handy syntactic sugar, /regexp/ without using the tilde operator matches against the current record; this syntax derives from sed, which in turn inherited it from the ed editor, where / is used for searching. This syntax of using slashes as delimiters for regular expressions was subsequently adopted by Perl and ECMAScript, and is now common. The tilde operator was also adopted by Perl. Commands AWK commands are the statements that are substituted for action in the examples above. AWK commands can include function calls, variable assignments, calculations, or any combination thereof. AWK contains built-in support for many functions; many more are provided by the various flavors of AWK. Also, some flavors support the inclusion of dynamically linked libraries, which can also provide more functions. The print command The print command is used to output text. The output text is always terminated with a predefined string called the output record separator (ORS) whose default value is a newline. The simplest form of this command is: print This displays the contents of the current record. In AWK, records are broken down into fields, and these can be displayed separately: print $1 Displays the first field of the current record print $1, $3 Displays the first and third fields of the current record, separated by a predefined string called the output field separator (OFS) whose default value is a single space character Although these fields ($X) may bear resemblance to variables (the $ symbol indicates variables in Perl), they actually refer to the fields of the current record. A special case, $0, refers to the entire record. In fact, the commands "print" and "print $0" are identical in functionality. The print command can also display the results of calculations and/or function calls: /regex_pattern/ { # Actions to perform in the event the record (line) matches the above regex_pattern print 3+2 print foobar(3) print foobar(variable) print sin(3-2) } Output may be sent to a file: /regex_pattern/ { # Actions to perform in the event the record (line) matches the above regex_pattern print "expression" > "file name" } or through a pipe: /regex_pattern/ { # Actions to perform in the event the record (line) matches the above regex_pattern print "expression" | "command" } Built-in variables Awk's built-in variables include the field variables: $1, $2, $3, and so on ($0 represents the entire record). They hold the text or values in the individual text-fields in a record. Other variables include: NR: Number of Records. Keeps a current count of the number of input records read so far from all data files. It starts at zero, but is never automatically reset to zero. FNR: File Number of Records. Keeps a current count of the number of input records read so far in the current file. This variable is automatically reset to zero each time a new file is started. NF: Number of Fields. Contains the number of fields in the current input record. The last field in the input record can be designated by $NF, the 2nd-to-last field by $(NF-1), the 3rd-to-last field by $(NF-2), etc. FILENAME: Contains the name of the current input-file. FS: Field Separator. Contains the "field separator" used to divide fields in the input record. The default, "white space", allows any sequence of space and tab characters. FS can be reassigned with another character or character sequence to change the field separator. RS: Record Separator. Stores the current "record separator" character. Since, by default, an input line is the input record, the default record separator character is a "newline". OFS: Output Field Separator. Stores the "output field separator", which separates the fields when Awk prints them. The default is a "space" character. ORS: Output Record Separator. Stores the "output record separator", which separates the output records when Awk prints them. The default is a "newline" character. OFMT: Output Format. Stores the format for numeric output. The default format is "%.6g". Variables and syntax Variable names can use any of the characters [A-Za-z0-9_], with the exception of language keywords. The operators + - * / represent addition, subtraction, multiplication, and division, respectively. For string concatenation, simply place two variables (or string constants) next to each other. It is optional to use a space in between if string constants are involved, but two variable names placed adjacent to each other require a space in between. Double quotes delimit string constants. Statements need not end with semicolons. Finally, comments can be added to programs by using # as the first character on a line. User-defined functions In a format similar to C, function definitions consist of the keyword function, the function name, argument names and the function body. Here is an example of a function. function add_three (number) { return number + 3 } This statement can be invoked as follows: (pattern) { print add_three(36) # Outputs '''39''' } Functions can have variables that are in the local scope. The names of these are added to the end of the argument list, though values for these should be omitted when calling the function. It is convention to add some whitespace in the argument list before the local variables, to indicate where the parameters end and the local variables begin. Examples Hello World Here is the customary "Hello, world" program written in AWK: BEGIN { print "Hello, world!" exit } Print lines longer than 80 characters Print all lines longer than 80 characters. Note that the default action is to print the current line. length($0) > 80 Count words Count words in the input and print the number of lines, words, and characters (like wc): { words += NF chars += length + 1 # add one to account for the newline character at the end of each record (line) } END { print NR, words, chars } As there is no pattern for the first line of the program, every line of input matches by default, so the increment actions are executed for every line. Note that words += NF is shorthand for words = words + NF. Sum last word { s += $NF } END { print s + 0 } s is incremented by the numeric value of $NF, which is the last word on the line as defined by AWK's field separator (by default, white-space). NF is the number of fields in the current line, e.g. 4. Since $4 is the value of the fourth field, $NF is the value of the last field in the line regardless of how many fields this line has, or whether it has more or fewer fields than surrounding lines. $ is actually a unary operator with the highest operator precedence. (If the line has no fields, then NF is 0, $0 is the whole line, which in this case is empty apart from possible white-space, and so has the numeric value 0.) At the end of the input the END pattern matches, so s is printed. However, since there may have been no lines of input at all, in which case no value has ever been assigned to s, it will by default be an empty string. Adding zero to a variable is an AWK idiom for coercing it from a string to a numeric value. (Concatenating an empty string is to coerce from a number to a string, e.g. s "". Note, there's no operator to concatenate strings, they're just placed adjacently.) With the coercion the program prints "0" on an empty input, without it, an empty line is printed. Match a range of input lines NR % 4 == 1, NR % 4 == 3 { printf "%6d %s\n", NR, $0 } The action statement prints each line numbered. The printf function emulates the standard C printf and works similarly to the print command described above. The pattern to match, however, works as follows: NR is the number of records, typically lines of input, AWK has so far read, i.e. the current line number, starting at 1 for the first line of input. % is the modulo operator. NR % 4 == 1 is true for the 1st, 5th, 9th, etc., lines of input. Likewise, NR % 4 == 3 is true for the 3rd, 7th, 11th, etc., lines of input. The range pattern is false until the first part matches, on line 1, and then remains true up to and including when the second part matches, on line 3. It then stays false until the first part matches again on line 5. Thus, the program prints lines 1,2,3, skips line 4, and then 5,6,7, and so on. For each line, it prints the line number (on a 6 character-wide field) and then the line contents. For example, when executed on this input: Rome Florence Milan Naples Turin Venice The previous program prints: 1 Rome 2 Florence 3 Milan 5 Turin 6 Venice Printing the initial or the final part of a file As a special case, when the first part of a range pattern is constantly true, e.g. 1, the range will start at the beginning of the input. Similarly, if the second part is constantly false, e.g. 0, the range will continue until the end of input. For example, /^--cut here--$/, 0 prints lines of input from the first line matching the regular expression ^--cut here--$, that is, a line containing only the phrase "--cut here--", to the end. Calculate word frequencies Word frequency using associative arrays: BEGIN { FS="[^a-zA-Z]+" } { for (i=1; i<=NF; i++) words[tolower($i)]++ } END { for (i in words) print i, words[i] } The BEGIN block sets the field separator to any sequence of non-alphabetic characters. Note that separators can be regular expressions. After that, we get to a bare action, which performs the action on every input line. In this case, for every field on the line, we add one to the number of times that word, first converted to lowercase, appears. Finally, in the END block, we print the words with their frequencies. The line for (i in words) creates a loop that goes through the array words, setting i to each subscript of the array. This is different from most languages, where such a loop goes through each value in the array. The loop thus prints out each word followed by its frequency count. tolower was an addition to the One True awk (see below) made after the book was published. Match pattern from command line This program can be represented in several ways. The first one uses the Bourne shell to make a shell script that does everything. It is the shortest of these methods: #!/bin/sh pattern="$1" shift awk '/'"$pattern"'/ { print FILENAME ":" $0 }' "$@" The $pattern in the awk command is not protected by single quotes so that the shell does expand the variable but it needs to be put in double quotes to properly handle patterns containing spaces. A pattern by itself in the usual way checks to see if the whole line ($0) matches. FILENAME contains the current filename. awk has no explicit concatenation operator; two adjacent strings concatenate them. $0 expands to the original unchanged input line. There are alternate ways of writing this. This shell script accesses the environment directly from within awk: #!/bin/sh export pattern="$1" shift awk '$0 ~ ENVIRON["pattern"] { print FILENAME ":" $0 }' "$@" This is a shell script that uses ENVIRON, an array introduced in a newer version of the One True awk after the book was published. The subscript of ENVIRON is the name of an environment variable; its result is the variable's value. This is like the getenv function in various standard libraries and POSIX. The shell script makes an environment variable pattern containing the first argument, then drops that argument and has awk look for the pattern in each file. ~ checks to see if its left operand matches its right operand; !~ is its inverse. Note that a regular expression is just a string and can be stored in variables. The next way uses command-line variable assignment, in which an argument to awk can be seen as an assignment to a variable: #!/bin/sh pattern="$1" shift awk '$0 ~ pattern { print FILENAME ":" $0 }' "pattern=$pattern" "$@" Or You can use the -v var=value command line option (e.g. awk -v pattern="$pattern" ...). Finally, this is written in pure awk, without help from a shell or without the need to know too much about the implementation of the awk script (as the variable assignment on command line one does), but is a bit lengthy: BEGIN { pattern = ARGV[1] for (i = 1; i < ARGC; i++) # remove first argument ARGV[i] = ARGV[i + 1] ARGC-- if (ARGC == 1) { # the pattern was the only thing, so force read from standard input (used by book) ARGC = 2 ARGV[1] = "-" } } $0 ~ pattern { print FILENAME ":" $0 } The BEGIN is necessary not only to extract the first argument, but also to prevent it from being interpreted as a filename after the BEGIN block ends. ARGC, the number of arguments, is always guaranteed to be ≥1, as ARGV[0] is the name of the command that executed the script, most often the string "awk". Also note that ARGV[ARGC] is the empty string, "". # initiates a comment that expands to the end of the line. Note the if block. awk only checks to see if it should read from standard input before it runs the command. This means that awk 'prog' only works because the fact that there are no filenames is only checked before prog is run! If you explicitly set ARGC to 1 so that there are no arguments, awk will simply quit because it feels there are no more input files. Therefore, you need to explicitly say to read from standard input with the special filename -. Self-contained AWK scripts On Unix-like operating systems self-contained AWK scripts can be constructed using the shebang syntax. For example, a script that prints the content of a given file may be built by creating a file named print.awk with the following content: #!/usr/bin/awk -f { print $0 } It can be invoked with: ./print.awk <filename> The -f tells AWK that the argument that follows is the file to read the AWK program from, which is the same flag that is used in sed. Since they are often used for one-liners, both these programs default to executing a program given as a command-line argument, rather than a separate file. Versions and implementations AWK was originally written in 1977 and distributed with Version 7 Unix. In 1985 its authors started expanding the language, most significantly by adding user-defined functions. The language is described in the book The AWK Programming Language, published 1988, and its implementation was made available in releases of UNIX System V. To avoid confusion with the incompatible older version, this version was sometimes called "new awk" or nawk. This implementation was released under a free software license in 1996 and is still maintained by Brian Kernighan (see external links below). Old versions of Unix, such as UNIX/32V, included awkcc, which converted AWK to C. Kernighan wrote a program to turn awk into C++; its state is not known. BWK awk, also known as nawk, refers to the version by Brian Kernighan. It has been dubbed the "One True AWK" because of the use of the term in association with the book that originally described the language and the fact that Kernighan was one of the original authors of AWK. FreeBSD refers to this version as one-true-awk. This version also has features not in the book, such as tolower and ENVIRON that are explained above; see the FIXES file in the source archive for details. This version is used by, for example, Android, FreeBSD, NetBSD, OpenBSD, macOS, and illumos. Brian Kernighan and Arnold Robbins are the main contributors to a source repository for nawk: . gawk (GNU awk) is another free-software implementation and the only implementation that makes serious progress implementing internationalization and localization and TCP/IP networking. It was written before the original implementation became freely available. It includes its own debugger, and its profiler enables the user to make measured performance enhancements to a script. It also enables the user to extend functionality with shared libraries. Some Linux distributions include gawk as their default AWK implementation. As of version 5.2 (September 2022) gawk includes a persistent memory feature that can remember script-defined variables and functions from one invocation of a script to the next and pass data between unrelated scripts, as described in the Persistent-Memory gawk User Manual: . gawk-csv. The CSV extension of gawk provides facilities for handling input and output CSV formatted data. mawk is a very fast AWK implementation by Mike Brennan based on a bytecode interpreter. libmawk is a fork of mawk, allowing applications to embed multiple parallel instances of awk interpreters. awka (whose front end is written atop the mawk program) is another translator of AWK scripts into C code. When compiled, statically including the author's libawka.a, the resulting executables are considerably sped up and, according to the author's tests, compare very well with other versions of AWK, Perl, or Tcl. Small scripts will turn into programs of 160–170 kB. tawk (Thompson AWK) is an AWK compiler for Solaris, DOS, OS/2, and Windows, previously sold by Thompson Automation Software (which has ceased its activities). Jawk is a project to implement AWK in Java, hosted on SourceForge. Extensions to the language are added to provide access to Java features within AWK scripts (i.e., Java threads, sockets, collections, etc.). xgawk is a fork of gawk that extends gawk with dynamically loadable libraries. The XMLgawk extension was integrated into the official GNU Awk release 4.1.0. QSEAWK is an embedded AWK interpreter implementation included in the QSE library that provides embedding application programming interface (API) for C and C++. libfawk is a very small, function-only, reentrant, embeddable interpreter written in C BusyBox includes an AWK implementation written by Dmitry Zakharov. This is a very small implementation suitable for embedded systems. CLAWK by Michael Parker provides an AWK implementation in Common Lisp, based upon the regular expression library of the same author. Books See also Data transformation Event-driven programming List of Unix commands sed References Further reading  – Interview with Alfred V. Aho on AWK AWK  – Become an expert in 60 minutes External links The Amazing Awk Assembler by Henry Spencer. awklang.org The site for things related to the awk language 1977 software Cross-platform software Domain-specific programming languages Free compilers and interpreters Pattern matching programming languages Plan 9 commands Programming languages created in 1977 Scripting languages Standard Unix programs Text-oriented programming languages Unix SUS2008 utilities Unix text processing utilities

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https://en.wikipedia.org/wiki/Apollo%20program

Apollo program

The Apollo program, also known as Project Apollo, was the United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which succeeded in preparing and landing the first humans on the Moon from 1968 to 1972. It was first conceived in 1960 during President Dwight D. Eisenhower's administration as a three-person spacecraft to follow the one-person Project Mercury, which put the first Americans in space. Apollo was later dedicated to President John F. Kennedy's national goal for the 1960s of "landing a man on the Moon and returning him safely to the Earth" in an address to Congress on May 25, 1961. It was the third US human spaceflight program to fly, preceded by the two-person Project Gemini conceived in 1961 to extend spaceflight capability in support of Apollo. Kennedy's goal was accomplished on the Apollo 11 mission when astronauts Neil Armstrong and Buzz Aldrin landed their Apollo Lunar Module (LM) on July 20, 1969, and walked on the lunar surface, while Michael Collins remained in lunar orbit in the command and service module (CSM), and all three landed safely on Earth in the Pacific Ocean on July 24. Five subsequent Apollo missions also landed astronauts on the Moon, the last, Apollo 17, in December 1972. In these six spaceflights, twelve people walked on the Moon. Apollo ran from 1961 to 1972, with the first crewed flight in 1968. It encountered a major setback in 1967 when an Apollo 1 cabin fire killed the entire crew during a prelaunch test. After the first successful landing, sufficient flight hardware remained for nine follow-on landings with a plan for extended lunar geological and astrophysical exploration. Budget cuts forced the cancellation of three of these. Five of the remaining six missions achieved successful landings, but the Apollo 13 landing was prevented by an oxygen tank explosion in transit to the Moon, crippling the CSM. The crew barely returned to Earth safely by using the lunar module as a "lifeboat" on the return journey. Apollo used the Saturn family of rockets as launch vehicles, which were also used for an Apollo Applications Program, which consisted of Skylab, a space station that supported three crewed missions in 1973–1974, and the Apollo–Soyuz Test Project, a joint United States-Soviet Union low Earth orbit mission in 1975. Apollo set several major human spaceflight milestones. It stands alone in sending crewed missions beyond low Earth orbit. Apollo 8 was the first crewed spacecraft to orbit another celestial body, and Apollo 11 was the first crewed spacecraft to land humans on one. Overall, the Apollo program returned of lunar rocks and soil to Earth, greatly contributing to the understanding of the Moon's composition and geological history. The program laid the foundation for NASA's subsequent human spaceflight capability and funded construction of its Johnson Space Center and Kennedy Space Center. Apollo also spurred advances in many areas of technology incidental to rocketry and human spaceflight, including avionics, telecommunications, and computers. Name The program was named after Apollo, the Greek god of light, music, and the Sun, by NASA manager Abe Silverstein, who later said, "I was naming the spacecraft like I'd name my baby." Silverstein chose the name at home one evening, early in 1960, because he felt "Apollo riding his chariot across the Sun was appropriate to the grand scale of the proposed program". The context of this was that the program focused at its beginning mainly on developing an advanced crewed spacecraft, the Apollo command and service module, succeeding the Mercury program. A lunar landing became the focus of the program only in 1961. Thereafter Project Gemini instead followed the Mercury program to test and study advanced crewed spaceflight technology. Background Origin and spacecraft feasibility studies The Apollo program was conceived during the Eisenhower administration in early 1960, as a follow-up to Project Mercury. While the Mercury capsule could support only one astronaut on a limited Earth orbital mission, Apollo would carry three. Possible missions included ferrying crews to a space station, circumlunar flights, and eventual crewed lunar landings. In July 1960, NASA Deputy Administrator Hugh L. Dryden announced the Apollo program to industry representatives at a series of Space Task Group conferences. Preliminary specifications were laid out for a spacecraft with a mission module cabin separate from the command module (piloting and reentry cabin), and a propulsion and equipment module. On August 30, a feasibility study competition was announced, and on October 25, three study contracts were awarded to General Dynamics/Convair, General Electric, and the Glenn L. Martin Company. Meanwhile, NASA performed its own in-house spacecraft design studies led by Maxime Faget, to serve as a gauge to judge and monitor the three industry designs. Political pressure builds In November 1960, John F. Kennedy was elected president after a campaign that promised American superiority over the Soviet Union in the fields of space exploration and missile defense. Up to the election of 1960, Kennedy had been speaking out against the "missile gap" that he and many other senators felt had developed between the Soviet Union and the United States due to the inaction of President Eisenhower. Beyond military power, Kennedy used aerospace technology as a symbol of national prestige, pledging to make the US not "first but, first and, first if, but first period". Despite Kennedy's rhetoric, he did not immediately come to a decision on the status of the Apollo program once he became president. He knew little about the technical details of the space program, and was put off by the massive financial commitment required by a crewed Moon landing. When Kennedy's newly appointed NASA Administrator James E. Webb requested a 30 percent budget increase for his agency, Kennedy supported an acceleration of NASA's large booster program but deferred a decision on the broader issue. On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to fly in space, reinforcing American fears about being left behind in a technological competition with the Soviet Union. At a meeting of the US House Committee on Science and Astronautics one day after Gagarin's flight, many congressmen pledged their support for a crash program aimed at ensuring that America would catch up. Kennedy was circumspect in his response to the news, refusing to make a commitment on America's response to the Soviets. On April 20, Kennedy sent a memo to Vice President Lyndon B. Johnson, asking Johnson to look into the status of America's space program, and into programs that could offer NASA the opportunity to catch up. Johnson responded approximately one week later, concluding that "we are neither making maximum effort nor achieving results necessary if this country is to reach a position of leadership." His memo concluded that a crewed Moon landing was far enough in the future that it was likely the United States would achieve it first. On May 25, 1961, twenty days after the first US crewed spaceflight Freedom 7, Kennedy proposed the crewed Moon landing in a Special Message to the Congress on Urgent National Needs: NASA expansion At the time of Kennedy's proposal, only one American had flown in space—less than a month earlier—and NASA had not yet sent an astronaut into orbit. Even some NASA employees doubted whether Kennedy's ambitious goal could be met. By 1963, Kennedy even came close to agreeing to a joint US-USSR Moon mission, to eliminate duplication of effort. With the clear goal of a crewed landing replacing the more nebulous goals of space stations and circumlunar flights, NASA decided that, in order to make progress quickly, it would discard the feasibility study designs of Convair, GE, and Martin, and proceed with Faget's command and service module design. The mission module was determined to be useful only as an extra room, and therefore unnecessary. They used Faget's design as the specification for another competition for spacecraft procurement bids in October 1961. On November 28, 1961, it was announced that North American Aviation had won the contract, although its bid was not rated as good as the Martin proposal. Webb, Dryden and Robert Seamans chose it in preference due to North American's longer association with NASA and its predecessor. Landing humans on the Moon by the end of 1969 required the most sudden burst of technological creativity, and the largest commitment of resources ($25 billion; $ in US dollars) ever made by any nation in peacetime. At its peak, the Apollo program employed 400,000 people and required the support of over 20,000 industrial firms and universities. On July 1, 1960, NASA established the Marshall Space Flight Center (MSFC) in Huntsville, Alabama. MSFC designed the heavy lift-class Saturn launch vehicles, which would be required for Apollo. Manned Spacecraft Center It became clear that managing the Apollo program would exceed the capabilities of Robert R. Gilruth's Space Task Group, which had been directing the nation's crewed space program from NASA's Langley Research Center. So Gilruth was given authority to grow his organization into a new NASA center, the Manned Spacecraft Center (MSC). A site was chosen in Houston, Texas, on land donated by Rice University, and Administrator Webb announced the conversion on September 19, 1961. It was also clear NASA would soon outgrow its practice of controlling missions from its Cape Canaveral Air Force Station launch facilities in Florida, so a new Mission Control Center would be included in the MSC. In September 1962, by which time two Project Mercury astronauts had orbited the Earth, Gilruth had moved his organization to rented space in Houston, and construction of the MSC facility was under way, Kennedy visited Rice to reiterate his challenge in a famous speech: The MSC was completed in September 1963. It was renamed by the US Congress in honor of Lyndon Johnson soon after his death in 1973. Launch Operations Center It also became clear that Apollo would outgrow the Canaveral launch facilities in Florida. The two newest launch complexes were already being built for the Saturn I and IB rockets at the northernmost end: LC-34 and LC-37. But an even bigger facility would be needed for the mammoth rocket required for the crewed lunar mission, so land acquisition was started in July 1961 for a Launch Operations Center (LOC) immediately north of Canaveral at Merritt Island. The design, development and construction of the center was conducted by Kurt H. Debus, a member of Wernher von Braun's original V-2 rocket engineering team. Debus was named the LOC's first Director. Construction began in November 1962. Following Kennedy's death, President Johnson issued an executive order on November 29, 1963, to rename the LOC and Cape Canaveral in honor of Kennedy. The LOC included Launch Complex 39, a Launch Control Center, and a Vertical Assembly Building (VAB). in which the space vehicle (launch vehicle and spacecraft) would be assembled on a mobile launcher platform and then moved by a crawler-transporter to one of several launch pads. Although at least three pads were planned, only two, designated AandB, were completed in October 1965. The LOC also included an Operations and Checkout Building (OCB) to which Gemini and Apollo spacecraft were initially received prior to being mated to their launch vehicles. The Apollo spacecraft could be tested in two vacuum chambers capable of simulating atmospheric pressure at altitudes up to , which is nearly a vacuum. Organization Administrator Webb realized that in order to keep Apollo costs under control, he had to develop greater project management skills in his organization, so he recruited George E. Mueller for a high management job. Mueller accepted, on the condition that he have a say in NASA reorganization necessary to effectively administer Apollo. Webb then worked with Associate Administrator (later Deputy Administrator) Seamans to reorganize the Office of Manned Space Flight (OMSF). On July 23, 1963, Webb announced Mueller's appointment as Deputy Associate Administrator for Manned Space Flight, to replace then Associate Administrator D. Brainerd Holmes on his retirement effective September 1. Under Webb's reorganization, the directors of the Manned Spacecraft Center (Gilruth), Marshall Space Flight Center (von Braun), and the Launch Operations Center (Debus) reported to Mueller. Based on his industry experience on Air Force missile projects, Mueller realized some skilled managers could be found among high-ranking officers in the U.S. Air Force, so he got Webb's permission to recruit General Samuel C. Phillips, who gained a reputation for his effective management of the Minuteman program, as OMSF program controller. Phillips's superior officer Bernard A. Schriever agreed to loan Phillips to NASA, along with a staff of officers under him, on the condition that Phillips be made Apollo Program Director. Mueller agreed, and Phillips managed Apollo from January 1964, until it achieved the first human landing in July 1969, after which he returned to Air Force duty. Charles Fishman, in One Giant Leap, estimated the number of people and organizations involved into the Apollo program as "410,000 men and women at some 20,000 different companies contributed to the effort". Choosing a mission mode Once Kennedy had defined a goal, the Apollo mission planners were faced with the challenge of designing a spacecraft that could meet it while minimizing risk to human life, cost, and demands on technology and astronaut skill. Four possible mission modes were considered: Direct Ascent: The spacecraft would be launched as a unit and travel directly to the lunar surface, without first going into lunar orbit. A Earth return ship would land all three astronauts atop a descent propulsion stage, which would be left on the Moon. This design would have required development of the extremely powerful Saturn C-8 or Nova launch vehicle to carry a payload to the Moon. Earth Orbit Rendezvous (EOR): Multiple rocket launches (up to 15 in some plans) would carry parts of the Direct Ascent spacecraft and propulsion units for translunar injection (TLI). These would be assembled into a single spacecraft in Earth orbit. Lunar Surface Rendezvous: Two spacecraft would be launched in succession. The first, an automated vehicle carrying propellant for the return to Earth, would land on the Moon, to be followed some time later by the crewed vehicle. Propellant would have to be transferred from the automated vehicle to the crewed vehicle. Lunar Orbit Rendezvous (LOR): This turned out to be the winning configuration, which achieved the goal with Apollo 11 on July 20, 1969: a single Saturn V launched a spacecraft that was composed of a Apollo command and service module which remained in orbit around the Moon and a two-stage Apollo Lunar Module spacecraft which was flown by two astronauts to the surface, flown back to dock with the command module and was then discarded. Landing the smaller spacecraft on the Moon, and returning an even smaller part () to lunar orbit, minimized the total mass to be launched from Earth, but this was the last method initially considered because of the perceived risk of rendezvous and docking. In early 1961, direct ascent was generally the mission mode in favor at NASA. Many engineers feared that rendezvous and docking, maneuvers that had not been attempted in Earth orbit, would be nearly impossible in lunar orbit. LOR advocates including John Houbolt at Langley Research Center emphasized the important weight reductions that were offered by the LOR approach. Throughout 1960 and 1961, Houbolt campaigned for the recognition of LOR as a viable and practical option. Bypassing the NASA hierarchy, he sent a series of memos and reports on the issue to Associate Administrator Robert Seamans; while acknowledging that he spoke "somewhat as a voice in the wilderness", Houbolt pleaded that LOR should not be discounted in studies of the question. Seamans's establishment of an ad hoc committee headed by his special technical assistant Nicholas E. Golovin in July 1961, to recommend a launch vehicle to be used in the Apollo program, represented a turning point in NASA's mission mode decision. This committee recognized that the chosen mode was an important part of the launch vehicle choice, and recommended in favor of a hybrid EOR-LOR mode. Its consideration of LOR—as well as Houbolt's ceaseless work—played an important role in publicizing the workability of the approach. In late 1961 and early 1962, members of the Manned Spacecraft Center began to come around to support LOR, including the newly hired deputy director of the Office of Manned Space Flight, Joseph Shea, who became a champion of LOR. The engineers at Marshall Space Flight Center (MSFC), which had much to lose from the decision, took longer to become convinced of its merits, but their conversion was announced by Wernher von Braun at a briefing on June 7, 1962. But even after NASA reached internal agreement, it was far from smooth sailing. Kennedy's science advisor Jerome Wiesner, who had expressed his opposition to human spaceflight to Kennedy before the President took office, and had opposed the decision to land people on the Moon, hired Golovin, who had left NASA, to chair his own "Space Vehicle Panel", ostensibly to monitor, but actually to second-guess NASA's decisions on the Saturn V launch vehicle and LOR by forcing Shea, Seamans, and even Webb to defend themselves, delaying its formal announcement to the press on July 11, 1962, and forcing Webb to still hedge the decision as "tentative". Wiesner kept up the pressure, even making the disagreement public during a two-day September visit by the President to Marshall Space Flight Center. Wiesner blurted out "No, that's no good" in front of the press, during a presentation by von Braun. Webb jumped in and defended von Braun, until Kennedy ended the squabble by stating that the matter was "still subject to final review". Webb held firm and issued a request for proposal to candidate Lunar Excursion Module (LEM) contractors. Wiesner finally relented, unwilling to settle the dispute once and for all in Kennedy's office, because of the President's involvement with the October Cuban Missile Crisis, and fear of Kennedy's support for Webb. NASA announced the selection of Grumman as the LEM contractor in November 1962. Space historian James Hansen concludes that: The LOR method had the advantage of allowing the lander spacecraft to be used as a "lifeboat" in the event of a failure of the command ship. Some documents prove this theory was discussed before and after the method was chosen. In 1964 an MSC study concluded, "The LM [as lifeboat]... was finally dropped, because no single reasonable CSM failure could be identified that would prohibit use of the SPS." Ironically, just such a failure happened on Apollo 13 when an oxygen tank explosion left the CSM without electrical power. The lunar module provided propulsion, electrical power and life support to get the crew home safely. Spacecraft Faget's preliminary Apollo design employed a cone-shaped command module, supported by one of several service modules providing propulsion and electrical power, sized appropriately for the space station, cislunar, and lunar landing missions. Once Kennedy's Moon landing goal became official, detailed design began of a command and service module (CSM) in which the crew would spend the entire direct-ascent mission and lift off from the lunar surface for the return trip, after being soft-landed by a larger landing propulsion module. The final choice of lunar orbit rendezvous changed the CSM's role to the translunar ferry used to transport the crew, along with a new spacecraft, the Lunar Excursion Module (LEM, later shortened to LM (Lunar Module) but still pronounced ) which would take two individuals to the lunar surface and return them to the CSM. Command and service module The command module (CM) was the conical crew cabin, designed to carry three astronauts from launch to lunar orbit and back to an Earth ocean landing. It was the only component of the Apollo spacecraft to survive without major configuration changes as the program evolved from the early Apollo study designs. Its exterior was covered with an ablative heat shield, and had its own reaction control system (RCS) engines to control its attitude and steer its atmospheric entry path. Parachutes were carried to slow its descent to splashdown. The module was tall, in diameter, and weighed approximately . A cylindrical service module (SM) supported the command module, with a service propulsion engine and an RCS with propellants, and a fuel cell power generation system with liquid hydrogen and liquid oxygen reactants. A high-gain S-band antenna was used for long-distance communications on the lunar flights. On the extended lunar missions, an orbital scientific instrument package was carried. The service module was discarded just before reentry. The module was long and in diameter. The initial lunar flight version weighed approximately fully fueled, while a later version designed to carry a lunar orbit scientific instrument package weighed just over . North American Aviation won the contract to build the CSM, and also the second stage of the Saturn V launch vehicle for NASA. Because the CSM design was started early before the selection of lunar orbit rendezvous, the service propulsion engine was sized to lift the CSM off the Moon, and thus was oversized to about twice the thrust required for translunar flight. Also, there was no provision for docking with the lunar module. A 1964 program definition study concluded that the initial design should be continued as Block I which would be used for early testing, while Block II, the actual lunar spacecraft, would incorporate the docking equipment and take advantage of the lessons learned in Block I development. Apollo Lunar Module The Apollo Lunar Module (LM) was designed to descend from lunar orbit to land two astronauts on the Moon and take them back to orbit to rendezvous with the command module. Not designed to fly through the Earth's atmosphere or return to Earth, its fuselage was designed totally without aerodynamic considerations and was of an extremely lightweight construction. It consisted of separate descent and ascent stages, each with its own engine. The descent stage contained storage for the descent propellant, surface stay consumables, and surface exploration equipment. The ascent stage contained the crew cabin, ascent propellant, and a reaction control system. The initial LM model weighed approximately , and allowed surface stays up to around 34 hours. An extended lunar module weighed over , and allowed surface stays of more than three days. The contract for design and construction of the lunar module was awarded to Grumman Aircraft Engineering Corporation, and the project was overseen by Thomas J. Kelly. Launch vehicles Before the Apollo program began, Wernher von Braun and his team of rocket engineers had started work on plans for very large launch vehicles, the Saturn series, and the even larger Nova series. In the midst of these plans, von Braun was transferred from the Army to NASA and was made Director of the Marshall Space Flight Center. The initial direct ascent plan to send the three-person Apollo command and service module directly to the lunar surface, on top of a large descent rocket stage, would require a Nova-class launcher, with a lunar payload capability of over . The June 11, 1962, decision to use lunar orbit rendezvous enabled the Saturn V to replace the Nova, and the MSFC proceeded to develop the Saturn rocket family for Apollo. Since Apollo, like Mercury, used more than one launch vehicle for space missions, NASA used spacecraft-launch vehicle combination series numbers: AS-10x for Saturn I, AS-20x for Saturn IB, and AS-50x for Saturn V (compare Mercury-Redstone 3, Mercury-Atlas 6) to designate and plan all missions, rather than numbering them sequentially as in Project Gemini. This was changed by the time human flights began. Little Joe II Since Apollo, like Mercury, would require a launch escape system (LES) in case of a launch failure, a relatively small rocket was required for qualification flight testing of this system. A rocket bigger than the Little Joe used by Mercury would be required, so the Little Joe II was built by General Dynamics/Convair. After an August 1963 qualification test flight, four LES test flights (A-001 through 004) were made at the White Sands Missile Range between May 1964 and January 1966. Saturn I Saturn I, the first US heavy lift launch vehicle, was initially planned to launch partially equipped CSMs in low Earth orbit tests. The S-I first stage burned RP-1 with liquid oxygen (LOX) oxidizer in eight clustered Rocketdyne H-1 engines, to produce of thrust. The S-IV second stage used six liquid hydrogen-fueled Pratt & Whitney RL-10 engines with of thrust. The S-V third stage flew inactively on Saturn I four times. The first four Saturn I test flights were launched from LC-34, with only the first stage live, carrying dummy upper stages filled with water. The first flight with a live S-IV was launched from LC-37. This was followed by five launches of boilerplate CSMs (designated AS-101 through AS-105) into orbit in 1964 and 1965. The last three of these further supported the Apollo program by also carrying Pegasus satellites, which verified the safety of the translunar environment by measuring the frequency and severity of micrometeorite impacts. In September 1962, NASA planned to launch four crewed CSM flights on the Saturn I from late 1965 through 1966, concurrent with Project Gemini. The payload capacity would have severely limited the systems which could be included, so the decision was made in October 1963 to use the uprated Saturn IB for all crewed Earth orbital flights. Saturn IB The Saturn IB was an upgraded version of the Saturn I. The S-IB first stage increased the thrust to by uprating the H-1 engine. The second stage replaced the S-IV with the S-IVB-200, powered by a single J-2 engine burning liquid hydrogen fuel with LOX, to produce of thrust. A restartable version of the S-IVB was used as the third stage of the Saturn V. The Saturn IB could send over into low Earth orbit, sufficient for a partially fueled CSM or the LM. Saturn IB launch vehicles and flights were designated with an AS-200 series number, "AS" indicating "Apollo Saturn" and the "2" indicating the second member of the Saturn rocket family. Saturn V Saturn V launch vehicles and flights were designated with an AS-500 series number, "AS" indicating "Apollo Saturn" and the "5" indicating Saturn V. The three-stage Saturn V was designed to send a fully fueled CSM and LM to the Moon. It was in diameter and stood tall with its lunar payload. Its capability grew to for the later advanced lunar landings. The S-IC first stage burned RP-1/LOX for a rated thrust of , which was upgraded to . The second and third stages burned liquid hydrogen; the third stage was a modified version of the S-IVB, with thrust increased to and capability to restart the engine for translunar injection after reaching a parking orbit. Astronauts NASA's director of flight crew operations during the Apollo program was Donald K. "Deke" Slayton, one of the original Mercury Seven astronauts who was medically grounded in September 1962 due to a heart murmur. Slayton was responsible for making all Gemini and Apollo crew assignments. Thirty-two astronauts were assigned to fly missions in the Apollo program. Twenty-four of these left Earth's orbit and flew around the Moon between December 1968 and December 1972 (three of them twice). Half of the 24 walked on the Moon's surface, though none of them returned to it after landing once. One of the moonwalkers was a trained geologist. Of the 32, Gus Grissom, Ed White, and Roger Chaffee were killed during a ground test in preparation for the Apollo 1 mission. The Apollo astronauts were chosen from the Project Mercury and Gemini veterans, plus from two later astronaut groups. All missions were commanded by Gemini or Mercury veterans. Crews on all development flights (except the Earth orbit CSM development flights) through the first two landings on Apollo 11 and Apollo 12, included at least two (sometimes three) Gemini veterans. Harrison Schmitt, a geologist, was the first NASA scientist astronaut to fly in space, and landed on the Moon on the last mission, Apollo 17. Schmitt participated in the lunar geology training of all of the Apollo landing crews. NASA awarded all 32 of these astronauts its highest honor, the Distinguished Service Medal, given for "distinguished service, ability, or courage", and personal "contribution representing substantial progress to the NASA mission". The medals were awarded posthumously to Grissom, White, and Chaffee in 1969, then to the crews of all missions from Apollo 8 onward. The crew that flew the first Earth orbital test mission Apollo 7, Walter M. Schirra, Donn Eisele, and Walter Cunningham, were awarded the lesser NASA Exceptional Service Medal, because of discipline problems with the flight director's orders during their flight. In October 2008, the NASA Administrator decided to award them the Distinguished Service Medals. For Schirra and Eisele, this was posthumously. Lunar mission profile The first lunar landing mission was planned to proceed: Profile variations The first three lunar missions (Apollo 8, Apollo 10, and Apollo 11) used a free return trajectory, keeping a flight path coplanar with the lunar orbit, which would allow a return to Earth in case the SM engine failed to make lunar orbit insertion. Landing site lighting conditions on later missions dictated a lunar orbital plane change, which required a course change maneuver soon after TLI, and eliminated the free-return option. After Apollo 12 placed the second of several seismometers on the Moon, the jettisoned LM ascent stages on Apollo 12 and later missions were deliberately crashed on the Moon at known locations to induce vibrations in the Moon's structure. The only exceptions to this were the Apollo 13 LM which burned up in the Earth's atmosphere, and Apollo 16, where a loss of attitude control after jettison prevented making a targeted impact. As another active seismic experiment, the S-IVBs on Apollo 13 and subsequent missions were deliberately crashed on the Moon instead of being sent to solar orbit. Starting with Apollo 13, descent orbit insertion was to be performed using the service module engine instead of the LM engine, in order to allow a greater fuel reserve for landing. This was actually done for the first time on Apollo 14, since the Apollo 13 mission was aborted before landing. Development history Uncrewed flight tests Two Block I CSMs were launched from LC-34 on suborbital flights in 1966 with the Saturn IB. The first, AS-201 launched on February 26, reached an altitude of and splashed down downrange in the Atlantic Ocean. The second, AS-202 on August 25, reached altitude and was recovered downrange in the Pacific Ocean. These flights validated the service module engine and the command module heat shield. A third Saturn IB test, AS-203 launched from pad 37, went into orbit to support design of the S-IVB upper stage restart capability needed for the Saturn V. It carried a nose cone instead of the Apollo spacecraft, and its payload was the unburned liquid hydrogen fuel, the behavior of which engineers measured with temperature and pressure sensors, and a TV camera. This flight occurred on July 5, before AS-202, which was delayed because of problems getting the Apollo spacecraft ready for flight. Preparation for crewed flight Two crewed orbital Block I CSM missions were planned: AS-204 and AS-205. The Block I crew positions were titled Command Pilot, Senior Pilot, and Pilot. The Senior Pilot would assume navigation duties, while the Pilot would function as a systems engineer. The astronauts would wear a modified version of the Gemini spacesuit. After an uncrewed LM test flight AS-206, a crew would fly the first Block II CSM and LM in a dual mission known as AS-207/208, or AS-278 (each spacecraft would be launched on a separate Saturn IB). The Block II crew positions were titled Commander, Command Module Pilot, and Lunar Module Pilot. The astronauts would begin wearing a new Apollo A6L spacesuit, designed to accommodate lunar extravehicular activity (EVA). The traditional visor helmet was replaced with a clear "fishbowl" type for greater visibility, and the lunar surface EVA suit would include a water-cooled undergarment. Deke Slayton, the grounded Mercury astronaut who became director of flight crew operations for the Gemini and Apollo programs, selected the first Apollo crew in January 1966, with Grissom as Command Pilot, White as Senior Pilot, and rookie Donn F. Eisele as Pilot. But Eisele dislocated his shoulder twice aboard the KC135 weightlessness training aircraft, and had to undergo surgery on January 27. Slayton replaced him with Chaffee. NASA announced the final crew selection for AS-204 on March 21, 1966, with the backup crew consisting of Gemini veterans James McDivitt and David Scott, with rookie Russell L. "Rusty" Schweickart. Mercury/Gemini veteran Wally Schirra, Eisele, and rookie Walter Cunningham were announced on September 29 as the prime crew for AS-205. In December 1966, the AS-205 mission was canceled, since the validation of the CSM would be accomplished on the 14-day first flight, and AS-205 would have been devoted to space experiments and contribute no new engineering knowledge about the spacecraft. Its Saturn IB was allocated to the dual mission, now redesignated AS-205/208 or AS-258, planned for August 1967. McDivitt, Scott and Schweickart were promoted to the prime AS-258 crew, and Schirra, Eisele and Cunningham were reassigned as the Apollo1 backup crew. Program delays The spacecraft for the AS-202 and AS-204 missions were delivered by North American Aviation to the Kennedy Space Center with long lists of equipment problems which had to be corrected before flight; these delays caused the launch of AS-202 to slip behind AS-203, and eliminated hopes the first crewed mission might be ready to launch as soon as November 1966, concurrently with the last Gemini mission. Eventually, the planned AS-204 flight date was pushed to February 21, 1967. North American Aviation was prime contractor not only for the Apollo CSM, but for the SaturnV S-II second stage as well, and delays in this stage pushed the first uncrewed SaturnV flight AS-501 from late 1966 to November 1967. (The initial assembly of AS-501 had to use a dummy spacer spool in place of the stage.) The problems with North American were severe enough in late 1965 to cause Manned Space Flight Administrator George Mueller to appoint program director Samuel Phillips to head a "tiger team" to investigate North American's problems and identify corrections. Phillips documented his findings in a December 19 letter to NAA president Lee Atwood, with a strongly worded letter by Mueller, and also gave a presentation of the results to Mueller and Deputy Administrator Robert Seamans. Meanwhile, Grumman was also encountering problems with the Lunar Module, eliminating hopes it would be ready for crewed flight in 1967, not long after the first crewed CSM flights. Apollo 1 fire Grissom, White, and Chaffee decided to name their flight Apollo1 as a motivational focus on the first crewed flight. They trained and conducted tests of their spacecraft at North American, and in the altitude chamber at the Kennedy Space Center. A "plugs-out" test was planned for January, which would simulate a launch countdown on LC-34 with the spacecraft transferring from pad-supplied to internal power. If successful, this would be followed by a more rigorous countdown simulation test closer to the February 21 launch, with both spacecraft and launch vehicle fueled. The plugs-out test began on the morning of January 27, 1967, and immediately was plagued with problems. First, the crew noticed a strange odor in their spacesuits which delayed the sealing of the hatch. Then, communications problems frustrated the astronauts and forced a hold in the simulated countdown. During this hold, an electrical fire began in the cabin and spread quickly in the high pressure, 100% oxygen atmosphere. Pressure rose high enough from the fire that the cabin inner wall burst, allowing the fire to erupt onto the pad area and frustrating attempts to rescue the crew. The astronauts were asphyxiated before the hatch could be opened. NASA immediately convened an accident review board, overseen by both houses of Congress. While the determination of responsibility for the accident was complex, the review board concluded that "deficiencies existed in command module design, workmanship and quality control". At the insistence of NASA Administrator Webb, North American removed Harrison Storms as command module program manager. Webb also reassigned Apollo Spacecraft Program Office (ASPO) Manager Joseph Francis Shea, replacing him with George Low. To remedy the causes of the fire, changes were made in the Block II spacecraft and operational procedures, the most important of which were use of a nitrogen/oxygen mixture instead of pure oxygen before and during launch, and removal of flammable cabin and space suit materials. The Block II design already called for replacement of the Block I plug-type hatch cover with a quick-release, outward opening door. NASA discontinued the crewed Block I program, using the BlockI spacecraft only for uncrewed SaturnV flights. Crew members would also exclusively wear modified, fire-resistant A7L Block II space suits, and would be designated by the Block II titles, regardless of whether a LM was present on the flight or not. Uncrewed Saturn V and LM tests On April 24, 1967, Mueller published an official Apollo mission numbering scheme, using sequential numbers for all flights, crewed or uncrewed. The sequence would start with Apollo 4 to cover the first three uncrewed flights while retiring the Apollo1 designation to honor the crew, per their widows' wishes. In September 1967, Mueller approved a sequence of mission types which had to be successfully accomplished in order to achieve the crewed lunar landing. Each step had to be successfully accomplished before the next ones could be performed, and it was unknown how many tries of each mission would be necessary; therefore letters were used instead of numbers. The A missions were uncrewed Saturn V validation; B was uncrewed LM validation using the Saturn IB; C was crewed CSM Earth orbit validation using the Saturn IB; D was the first crewed CSM/LM flight (this replaced AS-258, using a single Saturn V launch); E would be a higher Earth orbit CSM/LM flight; F would be the first lunar mission, testing the LM in lunar orbit but without landing (a "dress rehearsal"); and G would be the first crewed landing. The list of types covered follow-on lunar exploration to include H lunar landings, I for lunar orbital survey missions, and J for extended-stay lunar landings. The delay in the CSM caused by the fire enabled NASA to catch up on human-rating the LM and SaturnV. Apollo4 (AS-501) was the first uncrewed flight of the SaturnV, carrying a BlockI CSM on November 9, 1967. The capability of the command module's heat shield to survive a trans-lunar reentry was demonstrated by using the service module engine to ram it into the atmosphere at higher than the usual Earth-orbital reentry speed. Apollo 5 (AS-204) was the first uncrewed test flight of the LM in Earth orbit, launched from pad 37 on January 22, 1968, by the Saturn IB that would have been used for Apollo 1. The LM engines were successfully test-fired and restarted, despite a computer programming error which cut short the first descent stage firing. The ascent engine was fired in abort mode, known as a "fire-in-the-hole" test, where it was lit simultaneously with jettison of the descent stage. Although Grumman wanted a second uncrewed test, George Low decided the next LM flight would be crewed. This was followed on April 4, 1968, by Apollo 6 (AS-502) which carried a CSM and a LM Test Article as ballast. The intent of this mission was to achieve trans-lunar injection, followed closely by a simulated direct-return abort, using the service module engine to achieve another high-speed reentry. The Saturn V experienced pogo oscillation, a problem caused by non-steady engine combustion, which damaged fuel lines in the second and third stages. Two S-II engines shut down prematurely, but the remaining engines were able to compensate. The damage to the third stage engine was more severe, preventing it from restarting for trans-lunar injection. Mission controllers were able to use the service module engine to essentially repeat the flight profile of Apollo 4. Based on the good performance of Apollo6 and identification of satisfactory fixes to the Apollo6 problems, NASA declared the SaturnV ready to fly crew, canceling a third uncrewed test. Crewed development missions Apollo 7, launched from LC-34 on October 11, 1968, was the Cmission, crewed by Schirra, Eisele, and Cunningham. It was an 11-day Earth-orbital flight which tested the CSM systems. Apollo 8 was planned to be the D mission in December 1968, crewed by McDivitt, Scott and Schweickart, launched on a SaturnV instead of two Saturn IBs. In the summer it had become clear that the LM would not be ready in time. Rather than waste the Saturn V on another simple Earth-orbiting mission, ASPO Manager George Low suggested the bold step of sending Apollo8 to orbit the Moon instead, deferring the Dmission to the next mission in March 1969, and eliminating the E mission. This would keep the program on track. The Soviet Union had sent two tortoises, mealworms, wine flies, and other lifeforms around the Moon on September 15, 1968, aboard Zond 5, and it was believed they might soon repeat the feat with human cosmonauts. The decision was not announced publicly until successful completion of Apollo 7. Gemini veterans Frank Borman and Jim Lovell, and rookie William Anders captured the world's attention by making ten lunar orbits in 20 hours, transmitting television pictures of the lunar surface on Christmas Eve, and returning safely to Earth. The following March, LM flight, rendezvous and docking were successfully demonstrated in Earth orbit on Apollo 9, and Schweickart tested the full lunar EVA suit with its portable life support system (PLSS) outside the LM. The F mission was successfully carried out on Apollo 10 in May 1969 by Gemini veterans Thomas P. Stafford, John Young and Eugene Cernan. Stafford and Cernan took the LM to within of the lunar surface. The G mission was achieved on Apollo 11 in July 1969 by an all-Gemini veteran crew consisting of Neil Armstrong, Michael Collins and Buzz Aldrin. Armstrong and Aldrin performed the first landing at the Sea of Tranquility at 20:17:40 UTC on July 20, 1969. They spent a total of 21 hours, 36 minutes on the surface, and spent 2hours, 31 minutes outside the spacecraft, walking on the surface, taking photographs, collecting material samples, and deploying automated scientific instruments, while continuously sending black-and-white television back to Earth. The astronauts returned safely on July 24. Production lunar landings In November 1969, Charles "Pete" Conrad became the third person to step onto the Moon, which he did while speaking more informally than had Armstrong: Conrad and rookie Alan L. Bean made a precision landing of Apollo 12 within walking distance of the Surveyor 3 uncrewed lunar probe, which had landed in April 1967 on the Ocean of Storms. The command module pilot was Gemini veteran Richard F. Gordon Jr. Conrad and Bean carried the first lunar surface color television camera, but it was damaged when accidentally pointed into the Sun. They made two EVAs totaling 7hours and 45 minutes. On one, they walked to the Surveyor, photographed it, and removed some parts which they returned to Earth. The contracted batch of 15 Saturn Vs was enough for lunar landing missions through Apollo 20. Shortly after Apollo 11, NASA publicized a preliminary list of eight more planned landing sites after Apollo 12, with plans to increase the mass of the CSM and LM for the last five missions, along with the payload capacity of the Saturn V. These final missions would combine the I and J types in the 1967 list, allowing the CMP to operate a package of lunar orbital sensors and cameras while his companions were on the surface, and allowing them to stay on the Moon for over three days. These missions would also carry the Lunar Roving Vehicle (LRV) increasing the exploration area and allowing televised liftoff of the LM. Also, the Block II spacesuit was revised for the extended missions to allow greater flexibility and visibility for driving the LRV. The success of the first two landings allowed the remaining missions to be crewed with a single veteran as commander, with two rookies. Apollo 13 launched Lovell, Jack Swigert, and Fred Haise in April 1970, headed for the Fra Mauro formation. But two days out, a liquid oxygen tank exploded, disabling the service module and forcing the crew to use the LM as a "lifeboat" to return to Earth. Another NASA review board was convened to determine the cause, which turned out to be a combination of damage of the tank in the factory, and a subcontractor not making a tank component according to updated design specifications. Apollo was grounded again, for the remainder of 1970 while the oxygen tank was redesigned and an extra one was added. Mission cutbacks About the time of the first landing in 1969, it was decided to use an existing Saturn V to launch the Skylab orbital laboratory pre-built on the ground, replacing the original plan to construct it in orbit from several Saturn IB launches; this eliminated Apollo 20. NASA's yearly budget also began to shrink in light of the successful landing, and NASA also had to make funds available for the development of the upcoming Space Shuttle. By 1971, the decision was made to also cancel missions 18 and 19. The two unused Saturn Vs became museum exhibits at the John F. Kennedy Space Center on Merritt Island, Florida, George C. Marshall Space Center in Huntsville, Alabama, Michoud Assembly Facility in New Orleans, Louisiana, and Lyndon B. Johnson Space Center in Houston, Texas. The cutbacks forced mission planners to reassess the original planned landing sites in order to achieve the most effective geological sample and data collection from the remaining four missions. Apollo 15 had been planned to be the last of the H series missions, but since there would be only two subsequent missions left, it was changed to the first of three J missions. Apollo 13's Fra Mauro mission was reassigned to Apollo 14, commanded in February 1971 by Mercury veteran Alan Shepard, with Stuart Roosa and Edgar Mitchell. This time the mission was successful. Shepard and Mitchell spent 33 hours and 31 minutes on the surface, and completed two EVAs totalling 9hours 24 minutes, which was a record for the longest EVA by a lunar crew at the time. In August 1971, just after conclusion of the Apollo 15 mission, President Richard Nixon proposed canceling the two remaining lunar landing missions, Apollo 16 and 17. Office of Management and Budget Deputy Director Caspar Weinberger was opposed to this, and persuaded Nixon to keep the remaining missions. Extended missions Apollo 15 was launched on July 26, 1971, with David Scott, Alfred Worden and James Irwin. Scott and Irwin landed on July 30 near Hadley Rille, and spent just under two days, 19 hours on the surface. In over 18 hours of EVA, they collected about of lunar material. Apollo 16 landed in the Descartes Highlands on April 20, 1972. The crew was commanded by John Young, with Ken Mattingly and Charles Duke. Young and Duke spent just under three days on the surface, with a total of over 20 hours EVA. Apollo 17 was the last of the Apollo program, landing in the Taurus–Littrow region in December 1972. Eugene Cernan commanded Ronald E. Evans and NASA's first scientist-astronaut, geologist Harrison H. Schmitt. Schmitt was originally scheduled for Apollo 18, but the lunar geological community lobbied for his inclusion on the final lunar landing. Cernan and Schmitt stayed on the surface for just over three days and spent just over 23 hours of total EVA. Canceled missions Several missions were planned for but were canceled before details were finalized. Mission summary Source: Apollo by the Numbers: A Statistical Reference (Orloff 2004) Samples returned The Apollo program returned over of lunar rocks and soil to the Lunar Receiving Laboratory in Houston. Today, 75% of the samples are stored at the Lunar Sample Laboratory Facility built in 1979. The rocks collected from the Moon are extremely old compared to rocks found on Earth, as measured by radiometric dating techniques. They range in age from about 3.2 billion years for the basaltic samples derived from the lunar maria, to about 4.6 billion years for samples derived from the highlands crust. As such, they represent samples from a very early period in the development of the Solar System, that are largely absent on Earth. One important rock found during the Apollo Program is dubbed the Genesis Rock, retrieved by astronauts David Scott and James Irwin during the Apollo 15 mission. This anorthosite rock is composed almost exclusively of the calcium-rich feldspar mineral anorthite, and is believed to be representative of the highland crust. A geochemical component called KREEP was discovered by Apollo 12, which has no known terrestrial counterpart. KREEP and the anorthositic samples have been used to infer that the outer portion of the Moon was once completely molten (see lunar magma ocean). Almost all the rocks show evidence of impact process effects. Many samples appear to be pitted with micrometeoroid impact craters, which is never seen on Earth rocks, due to the thick atmosphere. Many show signs of being subjected to high-pressure shock waves that are generated during impact events. Some of the returned samples are of impact melt (materials melted near an impact crater.) All samples returned from the Moon are highly brecciated as a result of being subjected to multiple impact events. From analyses of the composition of the returned lunar samples, it is now believed that the Moon was created through the impact of a large astronomical body with Earth. Costs Apollo cost $25.4 billion (or approximately $ in dollars when adjusted for inflation via the GDP deflator index). Of this amount, $20.2 billion ($ adjusted) was spent on the design, development, and production of the Saturn family of launch vehicles, the Apollo spacecraft, spacesuits, scientific experiments, and mission operations. The cost of constructing and operating Apollo-related ground facilities, such as the NASA human spaceflight centers and the global tracking and data acquisition network, added an additional $5.2 billion ($ adjusted). The amount grows to $28 billion ($ adjusted) if the costs for related projects such as Project Gemini and the robotic Ranger, Surveyor, and Lunar Orbiter programs are included. NASA's official cost breakdown, as reported to Congress in the Spring of 1973, is as follows: Accurate estimates of human spaceflight costs were difficult in the early 1960s, as the capability was new and management experience was lacking. Preliminary cost analysis by NASA estimated $7 billion – $12 billion for a crewed lunar landing effort. NASA Administrator James Webb increased this estimate to $20 billion before reporting it to Vice President Johnson in April 1961. Project Apollo was a massive undertaking, representing the largest research and development project in peacetime. At its peak, it employed over 400,000 employees and contractors around the country and accounted for more than half of NASA's total spending in the 1960s. After the first Moon landing, public and political interest waned, including that of President Nixon, who wanted to rein in federal spending. NASA's budget could not sustain Apollo missions which cost, on average, $445 million ($ adjusted) each while simultaneously developing the Space Shuttle. The final fiscal year of Apollo funding was 1973. Apollo Applications Program Looking beyond the crewed lunar landings, NASA investigated several post-lunar applications for Apollo hardware. The Apollo Extension Series (Apollo X) proposed up to 30 flights to Earth orbit, using the space in the Spacecraft Lunar Module Adapter (SLA) to house a small orbital laboratory (workshop). Astronauts would continue to use the CSM as a ferry to the station. This study was followed by design of a larger orbital workshop to be built in orbit from an empty S-IVB Saturn upper stage and grew into the Apollo Applications Program (AAP). The workshop was to be supplemented by the Apollo Telescope Mount, which could be attached to the ascent stage of the lunar module via a rack. The most ambitious plan called for using an empty S-IVB as an interplanetary spacecraft for a Venus fly-by mission. The S-IVB orbital workshop was the only one of these plans to make it off the drawing board. Dubbed Skylab, it was assembled on the ground rather than in space, and launched in 1973 using the two lower stages of a Saturn V. It was equipped with an Apollo Telescope Mount. Skylab's last crew departed the station on February 8, 1974, and the station itself re-entered the atmosphere in 1979 after development of the Space Shuttle was delayed too long to save it. The Apollo–Soyuz program also used Apollo hardware for the first joint nation spaceflight, paving the way for future cooperation with other nations in the Space Shuttle and International Space Station programs. Recent observations In 2008, Japan Aerospace Exploration Agency's SELENE probe observed evidence of the halo surrounding the Apollo 15 Lunar Module blast crater while orbiting above the lunar surface. Beginning in 2009, NASA's robotic Lunar Reconnaissance Orbiter, while orbiting above the Moon, photographed the remnants of the Apollo program left on the lunar surface, and each site where crewed Apollo flights landed. All of the U.S. flags left on the Moon during the Apollo missions were found to still be standing, with the exception of the one left during the Apollo 11 mission, which was blown over during that mission's lift-off from the lunar surface; the degree to which these flags retain their original colors remains unknown. The flags cannot be seen through a telescope from Earth. In a November 16, 2009, editorial, The New York Times opined: Legacy Science and engineering The Apollo program has been described as the greatest technological achievement in human history. Apollo stimulated many areas of technology, leading to over 1,800 spinoff products as of 2015, including advances in the development of cordless power tools, fireproof materials, heart monitors, solar panels, digital imaging, and the use of liquid methane as fuel. The flight computer design used in both the lunar and command modules was, along with the Polaris and Minuteman missile systems, the driving force behind early research into integrated circuits (ICs). By 1963, Apollo was using 60 percent of the United States' production of ICs. The crucial difference between the requirements of Apollo and the missile programs was Apollo's much greater need for reliability. While the Navy and Air Force could work around reliability problems by deploying more missiles, the political and financial cost of failure of an Apollo mission was unacceptably high. Technologies and techniques required for Apollo were developed by Project Gemini. The Apollo project was enabled by NASA's adoption of new advances in semiconductor electronic technology, including metal–oxide–semiconductor field-effect transistors (MOSFETs) in the Interplanetary Monitoring Platform (IMP) and silicon integrated circuit chips in the Apollo Guidance Computer (AGC). Cultural impact The crew of Apollo 8 sent the first live televised pictures of the Earth and the Moon back to Earth, and read from the creation story in the Book of Genesis, on Christmas Eve 1968. An estimated one-quarter of the population of the world saw—either live or delayed—the Christmas Eve transmission during the ninth orbit of the Moon, and an estimated one-fifth of the population of the world watched the live transmission of the Apollo 11 moonwalk. The Apollo program also affected environmental activism in the 1970s due to photos taken by the astronauts. The most well known include Earthrise, taken by William Anders on Apollo 8, and The Blue Marble, taken by the Apollo 17 astronauts. The Blue Marble was released during a surge in environmentalism, and became a symbol of the environmental movement as a depiction of Earth's frailty, vulnerability, and isolation amid the vast expanse of space. According to The Economist, Apollo succeeded in accomplishing President Kennedy's goal of taking on the Soviet Union in the Space Race by accomplishing a singular and significant achievement, to demonstrate the superiority of the free-market system. The publication noted the irony that in order to achieve the goal, the program required the organization of tremendous public resources within a vast, centralized government bureaucracy. Apollo 11 broadcast data restoration project Prior to Apollo 11's 40th anniversary in 2009, NASA searched for the original videotapes of the mission's live televised moonwalk. After an exhaustive three-year search, it was concluded that the tapes had probably been erased and reused. A new digitally remastered version of the best available broadcast television footage was released instead. Depictions on film Documentaries Numerous documentary films cover the Apollo program and the Space Race, including: Footprints on the Moon (1969) Moonwalk One (1970) The Greatest Adventure (1978) For All Mankind (1989) Moon Shot (1994 miniseries) "Moon" from the BBC miniseries The Planets (1999) Magnificent Desolation: Walking on the Moon 3D (2005) The Wonder of It All (2007) In the Shadow of the Moon (2007) When We Left Earth: The NASA Missions (2008 miniseries) Moon Machines (2008 miniseries) James May on the Moon (2009) NASA's Story (2009 miniseries) Apollo 11 (2019) Chasing the Moon (2019 miniseries) Docudramas Some missions have been dramatized: Apollo 13 (1995) Apollo 11 (1996) From the Earth to the Moon (1998) The Dish (2000) Space Race (2005) Moonshot (2009) First Man (2018) Fictional The Apollo program has been the focus of several works of fiction, including: Apollo 18 (2011), horror movie which was released to negative reviews. For All Mankind (2019), TV series depicting an alternate history in which the Soviet Union was the first country to successfully land a man on the Moon. Indiana Jones and the Dial of Destiny (2023), fifth movie about Indiana Jones, in which Jürgen Voller, a NASA member and ex-Nazi involved with the Apollo program, wishes to make the world into a better place as he sees fit. See also Apollo 11 in popular culture Apollo Lunar Surface Experiments Package Exploration of the Moon Leslie Cantwell collection List of artificial objects on the Moon List of crewed spacecraft Moon landing conspiracy theories Third-party evidence for Apollo Moon landings Soviet crewed lunar programs Stolen and missing Moon rocks Artemis Program Notes References Citations Sources Chaikin interviewed all the surviving astronauts and others who worked with the program. Further reading   NASA Report JSC-09423, April 1975 Astronaut Mike Collins autobiography of his experiences as an astronaut, including his flight aboard Apollo 11. Although this book focuses on Apollo 13, it provides a wealth of background information on Apollo technology and procedures. History of the Apollo program from Apollos 1–11, including many interviews with the Apollo astronauts. Gleick, James, "Moon Fever" [review of Oliver Morton, The Moon: A History of the Future; Apollo's Muse: The Moon in the Age of Photography, an exhibition at the Metropolitan Museum of Art, New York City, July 3 – September 22, 2019; Douglas Brinkley, American Moonshot: John F. Kennedy and the Great Space Race; Brandon R. Brown, The Apollo Chronicles: Engineering America's First Moon Missions; Roger D. Launius, Reaching for the Moon: A Short History of the Space Race; Apollo 11, a documentary film directed by Todd Douglas Miller; and Michael Collins, Carrying the Fire: An Astronaut's Journeys (50th Anniversary Edition)], The New York Review of Books, vol. LXVI, no. 13 (15 August 2019), pp. 54–58. Factual, from the standpoint of a flight controller during the Mercury, Gemini, and Apollo space programs. Details the flight of Apollo 13. Tells Grumman's story of building the lunar modules. History of the crewed space program from 1September 1960, to 5January 1968. Account of Deke Slayton's life as an astronaut and of his work as chief of the astronaut office, including selection of Apollo crews.   From origin to November 7, 1962   November 8, 1962 – September 30, 1964   October 1, 1964 – January 20, 1966   January 21, 1966 – July 13, 1974 The history of lunar exploration from a geologist's point of view. External links Apollo program history at NASA's Human Space Flight (HSF) website The Apollo Program at the NASA History Program Office The Apollo Program at the National Air and Space Museum Apollo 35th Anniversary Interactive Feature at NASA (in Flash) Lunar Mission Timeline at the Lunar and Planetary Institute Apollo Collection, The University of Alabama in Huntsville Archives and Special Collections NASA reports Apollo Program Summary Report (PDF), NASA, JSC-09423, April 1975 NASA History Series Publications Project Apollo Drawings and Technical Diagrams at the NASA History Program Office The Apollo Lunar Surface Journal edited by Eric M. Jones and Ken Glover The Apollo Flight Journal by W. David Woods, et al. Multimedia NASA Apollo Program images and videos Apollo Image Archive at Arizona State University Audio recording and transcript of President John F. Kennedy, NASA administrator James Webb, et al., discussing the Apollo agenda (White House Cabinet Room, November 21, 1962) The Project Apollo Archive by Kipp Teague is a large repository of Apollo images, videos, and audio recordings The Project Apollo Archive on Flickr Apollo Image Atlas—almost 25,000 lunar images, Lunar and Planetary Institute 1960s in the United States 1970s in the United States Articles containing video clips Engineering projects Exploration of the Moon Human spaceflight programs NASA programs Space program of the United States

1466

https://en.wikipedia.org/wiki/Assault

Assault

An assault is the illegal act of causing physical harm or unwanted physical contact to another person, or, in some legal definitions, the threat or attempt to do so. It is both a crime and a tort and, therefore, may result in criminal prosecution, civil liability, or both. Additionally, assault is a criminal act in which a person intentionally causes fear of physical harm or offensive contact to another person. Assault can be committed with or without a weapon and can range from physical violence to threats of violence. Assault is frequently referred to as an attempt to commit battery, which is the deliberate use of physical force against another person. The deliberate inflicting of fear, apprehension, or terror is another definition of assault that can be found in several legal systems. Depending on the severity of the offense, assault may result in a fine, imprisonment, or even death. Generally, the common law definition is the same in criminal and tort law. Traditionally, common law legal systems have separate definitions for assault and battery. When this distinction is observed, battery refers to the actual bodily contact, whereas assault refers to a credible threat or attempt to cause battery. Some jurisdictions combined the two offenses into a single crime called "assault and battery", which then became widely referred to as "assault". The result is that in many of these jurisdictions, assault has taken on a definition that is more in line with the traditional definition of battery. The legal systems of civil law and Scots law have never distinguished assault from battery. Legal systems generally acknowledge that assaults can vary greatly in severity. In the United States, an assault can be charged as either a misdemeanor or a felony. In England and Wales and Australia, it can be charged as either common assault, assault occasioning actual bodily harm (ABH) or grievous bodily harm (GBH). Canada also has a three-tier system: assault, assault causing bodily harm and aggravated assault. Separate charges typically exist for sexual assaults, affray and assaulting a police officer. Assault may overlap with an attempted crime; for example, an assault may be charged as attempted murder if it was done with intent to kill. Related definitions Battery Battery is a criminal offense that involves the use of physical force against another person without their consent. It is a type of assault and is considered a serious crime. Battery can include a wide range of actions, from slapping someone to causing serious harm or even death. Depending on the severity of the offense, it can carry a wide range of punishments, including jail time, fines, and probation. In jurisdictions that make a distinction between the two, assault usually accompanies battery if the assailant both threatens to make unwanted contact and then carries through with this threat. See common assault. The elements of battery are that it is a volitional act, done for the purpose of causing a harmful or offensive contact with another person or under circumstances that make such contact substantially certain to occur, and which causes such contact. Aggravated assault Aggravated assault is a violent crime that involves violence or the threat of violence. It is generally described as an intentional act that causes another person to fear imminent physical harm or injury. This can include the use of a weapon, or the threat of using a weapon. It is usually considered a felony offense and can carry severe penalties. Aggravated assault is often considered a very serious crime and can lead to long-term prison sentences. Aggravated assault is, in some jurisdictions, a stronger form of assault, usually using a deadly weapon. A person has committed an aggravated assault when that person attempts to: cause serious bodily injury to another person with a deadly weapon have sexual relations with a person who is under the age of consent cause bodily harm by recklessly operating a motor vehicle during road rage; often referred to as either vehicular assault or aggravated assault with a motor vehicle. Aggravated assault can also be charged in cases of attempted harm against police officers or other public servants. Defenses Although the range and precise application of defenses varies between jurisdictions, the following represents a list of the defenses that may apply to all levels of assault: Consent Exceptions exist to cover unsolicited physical contact which amount to normal social behavior known as de minimis harm. Assault can also be considered in cases involving the spitting on, or unwanted exposure of bodily fluids to others. Consent may be a complete or partial defense to assault. In some jurisdictions, most notably England, it is not a defense where the degree of injury is severe, as long as there is no legally recognized good reason for the assault. This can have important consequences when dealing with issues such as consensual sadomasochistic sexual activity, the most notable case being the Operation Spanner case. Legally recognized good reasons for consent include surgery, activities within the rules of a game (mixed martial arts, wrestling, boxing, or contact sports), bodily adornment (R v Wilson [1996] Crim LR 573), or horseplay (R v Jones [1987] Crim LR 123). However, any activity outside the rules of the game is not legally recognized as a defense of consent. In Scottish law, consent is not a defense for assault. Arrest and other official acts Police officers and court officials have a general power to use force for the purpose of performing an arrest or generally carrying out their official duties. Thus, a court officer taking possession of goods under a court order may use force if reasonably necessary. Punishment In some jurisdictions such as Singapore, judicial corporal punishment is part of the legal system. The officers who administer the punishment have immunity from prosecution for assault. In the United States, England, Northern Ireland, Australia and Canada, corporal punishment administered to children by their parent or legal guardian is not legally considered to be assault unless it is deemed to be excessive or unreasonable. What constitutes "reasonable" varies in both statutory law and case law. Unreasonable physical punishment may be charged as assault or under a separate statute for child abuse. In English law, s. 58 Children Act 2004 limits the availability of the lawful correction defense to common assault. This defence was abolished in Wales in 2022. Many countries, including some US states, also permit the use of corporal punishment for children in school. Prevention of crime This may or may not involve self-defense in that, using a reasonable degree of force to prevent another from committing a crime could involve preventing an assault, but it could be preventing a crime not involving the use of personal violence. Defense of property Some jurisdictions allow force to be used in defense of property, to prevent damage either in its own right, or under one or both of the preceding classes of defense in that a threat or attempt to damage property might be considered a crime (in English law, under s5 Criminal Damage Act 1971 it may be argued that the defendant has a lawful excuse to damage property during the defense and a defense under s3 Criminal Law Act 1967) subject to the need to deter vigilantes and excessive self-help. Furthermore, some jurisdictions, such as Ohio, allow residents in their homes to use force when ejecting an intruder. The resident merely needs to assert to the court that they felt threatened by the intruder's presence. Regional details The following are the countries with the most cases of assault according to the United Nations in 2018. Australia The term 'assault', when used in legislation, commonly refers to both common assault and battery, even though the two offences remain distinct. Common assault involves intentionally or recklessly causing a person to apprehend the imminent infliction of unlawful force, whilst battery refers to the actual infliction of force. Each state has legislation relating to the act of assault, and offences against the act that constitute assault are heard in the magistrates' court of that state or indictable offences are heard in a district or supreme court of that state. The legislation that defines assault of each state outline what the elements are that make up the assault, where the assault is sectioned in legislation or criminal codes, and the penalties that apply for the offence of assault. In New South Wales, the Crimes Act 1900 defines a range of assault offences deemed more serious than common assault and which attract heavier penalties. These include: Assault with further specific intent Acts done to the person with intent to murder Wounding or grievous bodily harm Use or possession of a weapon to resist arrest Assault causing certain injuries Actual bodily harm – the term is not defined in the Crimes Act, but case law indicates actual bodily harm may include injuries such as bruises and scratches, as well as psychological injuries if the injury inflicted is more than merely transient (the injury does not necessarily need to be permanent) Wounding – where there is breaking of the skin; Grievous bodily harm – which includes the destruction of a foetus, permanent or serious disfiguring, and transmission of a grievous bodily disease Assault causing death Death Death when intoxicated (in regards to the offender) Canada Assault is an offence under s. 265 of the Canadian Criminal Code. There is a wide range of the types of assault that can occur. Generally, an assault occurs when a person directly or indirectly applies force intentionally to another person without their consent. It can also occur when a person attempts to apply such force, or threatens to do so, without the consent of the other person. An injury need not occur for an assault to be committed, but the force used in the assault must be offensive in nature with an intention to apply force. It can be an assault to "tap", "pinch", "push", or direct another such minor action toward another, but an accidental application of force is not an assault. The potential punishment for an assault in Canada varies depending on the manner in which the charge proceeds through the court system and the type of assault that is committed. The Criminal Code defines assault as a dual offence (indictable or summary offence). Police officers can arrest someone without a warrant for an assault if it is in the public's interest to do so notwithstanding S.495(2)(d) of the Code. This public interest is usually satisfied by preventing a continuation or repetition of the offence on the same victim. Some variations on the ordinary crime of assault include: Assault: The offence is defined by section 265 of the Code. Assault with a weapon: Section 267(a) of the Code. Assault causing bodily harm: See assault causing bodily harm Section 267(b) of the Code. Aggravated assault: Section 268 of the Code. Assaulting a peace officer, etc.: Section 270 of the Code. Sexual assault: Section 271 of the Code. Sexual assault with a weapon or threats or causing bodily harm: Section 272 of the Code. Aggravated sexual assault: See aggravated sexual assault. An individual cannot consent to an assault with a weapon, assault causing bodily harm, aggravated assault, or any sexual assault. Consent will also be vitiated if two people consent to fight but serious bodily harm is intended and caused (R v Paice; R v Jobidon). A person cannot consent to serious bodily harm. Ancient Greece Assault in Ancient Greece was normally termed hubris. Contrary to modern usage, the term did not have the extended connotation of overweening pride, self-confidence or arrogance, often resulting in fatal retribution. In Ancient Greece, "hubris" referred to actions which, intentionally or not, shamed and humiliated the victim, and frequently the perpetrator as well. It was most evident in the public and private actions of the powerful and rich. Violations of the law against hubris included, what would today be termed, assault and battery; sexual crimes ranging from forcible rape of women or children to consensual but improper activities; or the theft of public or sacred property. Two well-known cases are found in the speeches of Demosthenes, a prominent statesman and orator in ancient Greece. These two examples occurred when first, in addition to other acts of violence, Meidias allegedly punched Demosthenes in the face in the theater (Against Meidias), and second (Against Konon), when the defendant allegedly severely beat him. Hubris, though not specifically defined, was a legal term and was considered a crime in classical Athens. It was also considered the greatest sin of the ancient Greek world. That was so because it not only was proof of excessive pride, but also resulted in violent acts by or to those involved. The category of acts constituting hubris for the ancient Greeks apparently broadened from the original specific reference to mutilation of a corpse, or a humiliation of a defeated foe, or irreverent, "outrageous treatment", in general. The meaning was eventually further generalized in its modern English usage to apply to any outrageous act or exhibition of pride or disregard for basic moral laws. Such an act may be referred to as an "act of hubris", or the person committing the act may be said to be hubristic. Atë, Greek for 'ruin, folly, delusion', is the action performed by the hero, usually because of their hubris, or great pride, that leads to their death or downfall. Crucial to this definition are the ancient Greek concepts of honor (timē) and shame. The concept of timē included not only the exaltation of the one receiving honor, but also the shaming of the one overcome by the act of hubris. This concept of honor is akin to a zero-sum game. Rush Rehm simplifies this definition to the contemporary concept of "insolence, contempt, and excessive violence". India The Indian Penal Code covers the punishments and types of assault in Chapter 16, sections 351 through 358. The Code further explains that "mere words do not amount to an assault. But the words which a person uses may give to their gestures or preparation such a meaning as may make those gestures or preparations amount to an assault". Assault is in Indian criminal law an attempt to use criminal force (with criminal force being described in s.350). The attempt itself has been made an offence in India, as in other states. Nigeria The Criminal Code Act (chapter 29 of Part V; sections 351 to 365) creates a number of offences of assault. Assault is defined by section 252 of that Act. Assault is a misdemeanor punishable by one year imprisonment; assault with "intent to have carnal knowledge of him or her" or who indecently assaults another, or who commits other more-serious variants of assault (as defined in the Act) are guilty of a felony, and longer prison terms are provided for. Pacific Islands Marshall Islands The offence of assault is created by section 113 of the Criminal Code. A person is guilty of this offence if they unlawfully offer or attempt, with force or violence, to strike, beat, wound, or do bodily harm to, another. Republic of Ireland Section 2 of the Non-Fatal Offences against the Person Act 1997 creates the offence of assault, and section 3 of that Act creates the offence of assault causing harm. South Africa South African law does not draw the distinction between assault and battery. Assault is a common law crime defined as "unlawfully and intentionally applying force to the person of another, or inspiring a belief in that other that force is immediately to be applied to him". The law also recognises the crime of assault with intent to cause grievous bodily harm, where grievous bodily harm is defined as "harm which in itself is such as seriously to interfere with health". The common law crime of indecent assault was repealed by the Criminal Law (Sexual Offences and Related Matters) Amendment Act, 2007, and replaced by a statutory crime of sexual assault. United Kingdom Piracy with violence Section 2 of the Piracy Act 1837 provides that it is an offence, amongst other things, for a person, with intent to commit or at the time of or immediately before or immediately after committing the crime of piracy in respect of any ship or vessel, to assault, with intent to murder, any person being on board of or belonging to such ship or vessel. Assault on an officer of Revenue and Customs This offence (relating to officers of HMRC) is created by section 32(1) of the Commissioners for Revenue and Customs Act 2005. Assaulting an immigration officer This offence is created by section 22(1) of the UK Borders Act 2007. Assaulting an accredited financial investigator This section is created by section 453A of the Proceeds of Crime Act 2002. Assaulting a member of an international joint investigation team This offence is created by section 57(2) of the Serious Organised Crime and Police Act 2005. Attacks on internationally protected persons Section 1(1)(a) of the Internationally Protected Persons Act 1978 (c.17) makes provision for assault occasioning actual bodily harm or causing injury on "protected persons" (including Heads of State). Attacks on UN Staff workers Section 1(2)(a) of the United Nations Personnel Act 1997 (c.13) makes provision for assault causing injury, and section 1(2)(b) makes provision for assault occasioning actual bodily harm, on UN staff. Assault by person committing an offence under the Night Poaching Act 1828 This offence is created by section 2 of the Night Poaching Act 1828. Abolished offences: Assault on customs and excise officers, etc. Section 16(1)(a) of the Customs and Excise Management Act 1979 (c.2) provided that it was an offence to, amongst other things, assault any person duly engaged in the performance of any duty or the exercise of any power imposed or conferred on him by or under any enactment relating to an assigned matter, or any person acting in his aid. For the meaning of "assault" in this provision, see Logdon v. DPP [1976] Crim LR 121, DC. This offence was abolished and replaced by the Commissioners for Revenue and Customs Act 2005. Assaulting a person designated under section 43 of the Serious Organised Crime and Police Act 2005 This offence was created by section 51(1) of the Serious Organised Crime and Police Act 2005. It related to officers of the Serious Organized Crime Agency and was repealed when that agency was abolished. England and Wales English law provides for two offences of assault: common assault and battery. Assault (or common assault) is committed if one intentionally or recklessly causes another person to apprehend immediate and unlawful personal violence. Violence in this context means any unlawful touching, though there is some debate over whether the touching must also be hostile. The terms "assault" and "common assault" often encompass the separate offence of battery, even in statutory settings such as s 40(3)(a) of the Criminal Justice Act 1988. A common assault is an assault that lacks any of the aggravating features which Parliament has deemed serious enough to deserve a higher penalty. Section 39 of the Criminal Justice Act 1988 provides that common assault, like battery, is triable only in the magistrates' court in England and Wales (unless it is linked to a more serious offence, which is triable in the Crown Court). Additionally, if a defendant has been charged on an indictment with assault occasioning actual bodily harm (ABH), or racially/religiously aggravated assault, then a jury in the Crown Court may acquit the defendant of the more serious offence, but still convict of common assault if it finds common assault has been committed. Aggravated assault An assault which is aggravated by the scale of the injuries inflicted may be charged as offences causing "actual bodily harm" (ABH) or, in the severest cases, "grievous bodily harm" (GBH). Assault occasioning actual bodily harm This offence is created by section 47 of the Offences against the Person Act 1861. Inflicting grievous bodily harm Also referred to as "malicious wounding" or "unlawful wounding". This offence is created by section 20 of the Offences against the Person Act 1861. Causing grievous bodily harm with intent Also referred to as "wounding with intent". This offence is created by section 18 of the Offences against the Person Act 1861. Other aggravated assault charges refer to assaults carried out against a specific target or with a specific intent: Assault with intent to rob The penalty for assault with intent to rob, a common law offence, is provided by section 8(2) of the Theft Act 1968. Racially or religiously aggravated common assault This offence is created by section 29(1)(c) of the Crime and Disorder Act 1998, defined in terms of the common law offence. Racially or religiously aggravated assault occasioning actual bodily harm This offence is created by section 29(1)(b) of the Crime and Disorder Act 1998, defined in terms of the common law offence. Assault with intent to resist arrest This offence is created by section 38 of the Offences against the Person Act 1861. Assaulting a constable in the execution of his duty Section 89(1) of the Police Act 1996 provides that it is an offence for a person to assault a constable acting in the execution of his duty or a person assisting a constable in the execution of his duty. It is a summary offence with the same maximum penalty as common assault. Assaulting a traffic officer This offence is created by section/10 section 10(1) of the Traffic Management Act 2004. Assaulting a person designated or accredited under sections 38 or 39 or 41 or 41A of the Police Reform Act 2002 This offence is created by section/46 section 46(1) of the Police Reform Act 2002. Those sections relate respectively to persons given police powers by a chief police officer, detention contractors retained by police, accredited contractors under a community safety accreditation scheme, and weights and measures inspectors. Assault on a prison custody officer This offence is created by section 90(1) of the Criminal Justice Act 1991 (c.53). Assault on a secure training centre custody officer This offence is created by section 13(1) of the Criminal Justice and Public Order Act 1994 (c.33). Assault on officer saving wreck This offence is created by section 37 of the Offences against the Person Act 1861. Assaulting an officer of the court This offence is created by section 14(1)(b) of the County Courts Act 1984. Cruelty to persons under sixteen This offence is created by section 1(1) of the Children and Young Persons Act 1933 and applies to a person who has responsibility for the child. In England (but not Wales since 2022), common law provides a defence of "reasonable punishment" to battery (i.e. assaults involving touching); the Children Act 2004 limits the defence to exclude, among other offences, cruelty under the 1933 Act, but not battery, which implies that smacking is not always to be considered cruelty. Sexual assault The offence of sexual assault is created by section 3 of the Sexual Offences Act 2003. It is not defined in terms of the offences of common assault or battery. It instead requires intentional touching and the absence of a reasonable belief in consent. Assault by penetration This offence is defined by section 2 of the Sexual Offences Act 2003. Whereas rape consists only of penetration with the perpetrator's penis, assault by penetration can be committed with anything, though unlike rape it excludes penetration of the mouth. It carries the same maximum sentence of life imprisonment. Assault on an emergency worker The Assaults on Emergency Workers (Offences) Act 2018 makes common assault an either way offence (section 1) when committed against an emergency worker (defined in section 3), with a maximum sentence of two years' imprisonment if tried on indictment. The Act did not repeal any enactments, so the existing offence of assault on a constable is still available, but that offence cannot be tried on indictment and is therefore limited to six months. Scotland In Scots law, assault is defined as an "attack upon the person of another". There is no distinction made in Scotland between assault and battery (which is not a term used in Scots law), although, as in England and Wales, assault can be occasioned without a physical attack on another's person, as demonstrated in Atkinson v. HM Advocate wherein the accused was found guilty of assaulting a shop assistant by simply jumping over a counter wearing a ski mask. The court said: Scots law also provides for a more serious charge of aggravated assault on the basis of such factors as severity of injury, the use of a weapon, or Hamesucken (to assault a person in their own home). The mens rea for assault is simply "evil intent", although this has been held to mean no more than that assault "cannot be committed accidentally or recklessly or negligently" as upheld in Lord Advocate's Reference No 2 of 1992 where it was found that a "hold-up" in a shop justified as a joke would still constitute an offence. It is a separate offence to assault on a constable in the execution of their duty, under Section 90, Police and Fire Reform (Scotland) Act 2012 (previously Section 41 of the Police (Scotland) Act 1967) which provides that it is an offence for a person to, amongst other things, assault a constable in the execution of their duty or a person assisting a constable in the execution of their duty. Northern Ireland Several offences of assault exist in Northern Ireland. The Offences against the Person Act 1861 creates the offences of: Common assault and battery: a summary offence, under section 42; Aggravated assault and battery: a summary offence, under section 43 Common assault: under section 47 Assault occasioning actual bodily harm: under section 47 The Criminal Justice (Miscellaneous Provisions) Act (Northern Ireland) 1968 creates the offences of: Assault with intent to resist arrest: under section 7(1)(b); this offence was formerly created by s.38 of the OAPA 1861. That Act formerly created the offence of 'Assault on a constable in the execution of his duty'. under section 7(1)(a), but that section has been superseded by section 66(1) of the Police (Northern Ireland) Act 1998 (c.32) which now provides that it is an offence for a person to, amongst other things, assault a constable in the execution of his duty, or a person assisting a constable in the execution of his duty. United States In the United States, assault may be defined as an attempt to commit a battery. However, the crime of assault can encompass acts in which no battery is intended, but the defendant's act nonetheless creates reasonable fear in others that a battery will occur. Four elements were required at common law: The apparent, present ability to carry out; An unlawful attempt; To commit a violent injury; Upon another. As the criminal law evolved, element one was weakened in most jurisdictions so that a reasonable fear of bodily injury would suffice. These four elements were eventually codified in most states. The crime of assault generally requires that both the perpetrator and the victim of an assault be a natural person. Thus, unless the attack is directed by a person, an animal attack does not constitute an assault. However, under limited circumstances the Unborn Victims of Violence Act of 2004 treats a fetus as a separate person for the purposes of assault and other violent crimes. Possible examples of defenses, mitigating circumstances, or failures of proof that may be raised in response to an assault charge include: Lack of intent: A defendant could argue that since they were drunk, they could not form the specific intent to commit assault. This defense would most likely fail, however, since only involuntary intoxication is accepted as a defense in most American jurisdictions. Mutual consent: A defendant could also argue that they were engaged in mutually consensual behavior. For example, boxers who are fighting in an organized boxing match and do not significantly deviate from the rules of the sport cannot be charged with assault. State laws Laws on assault vary by state. Since each state has its own criminal laws, there is no universal assault law. Acts classified as assault in one state may be classified as battery, menacing, intimidation, reckless endangerment, etc. in another state. Assault is often subdivided into two categories, simple assault and aggravated assault. Simple assault involves an intentional act that causes another person to be in reasonable fear of an imminent battery. Simple assault may also involve an attempt to cause harm to another person, where that attempt does not succeed. Simple assault is typically classified as a misdemeanor offense, unless the victim is a member of a protected class, such as being a law enforcement officer. Even as a misdemeanor, an assault conviction may still result in incarceration and in a criminal record. Aggravated assault involves more serious actions, such as an assault that is committed with the intent to cause a serious bodily injury, or an assault that is committed with a deadly weapon such as a firearm. Aggravated assault is typically classified as a felony offense. Modern American statutes may define assault as including: an attempt to cause or purposely, knowingly, or recklessly causing bodily injury to another negligently causing bodily injury to another with a dangerous weapon (assault with a deadly weapon). causing bodily harm by reckless operation of a motor vehicle (vehicular assault). threatening another in a menacing manner. knowingly causing physical contact with another person knowing the other person will regard the contact as offensive or provocative causing stupor, unconsciousness or physical injury by intentionally administering a drug or controlled substance without consent purposely or knowingly causing reasonable apprehension of bodily injury in another any act which is intended to place another in fear of immediate physical contact which will be painful, injurious, insulting, or offensive, coupled with the apparent ability to execute the act. In some states, consent is a complete defense to assault. In other jurisdictions, mutual consent is an incomplete defense to an assault charge such that an assault charge is prosecuted as a less significant offense such as a petty misdemeanor. States vary on whether it is possible to commit an "attempted assault" since it can be considered a double inchoate offense. Kansas In Kansas the law on assault states: New York In New York State, assault (as defined in the New York State Penal Code Article 120) requires an actual injury. Other states define this as battery; there is no crime of battery in New York. However, in New York if a person threatens another person with imminent injury without engaging in physical contact, that is called "menacing". A person who engages in that behavior is guilty of aggravated harassment in the second degree (a Class A misdemeanor; punishable with up to one year incarceration, probation for an extended time, and a permanent criminal record) when they threaten to cause physical harm to another person, and guilty of aggravated harassment in the first degree (a Class E felony) if they have a previous conviction for the same offense. New York also has specific laws against hazing, when such threats are made as requirement to join an organization. North Dakota North Dakota law states: Pennsylvania In Pennsylvania, an offender can be charged with simple assault if they: injure someone else recklessly, knowingly, or purposefully accidentally injure someone with a firearm or weapon cause a needle-stick to an officer or correctional employee during a search or arrest threaten or intimidate someone causing fear of imminent serious bodily injury A person convicted of simple assault can be ordered to up to two years in prison as a second-degree misdemeanor. An offender can be charged with aggravated assault if the offender: demonstrates extreme indifference to the victim's life injures or threatens to injure a law enforcement officer, correctional officer, firefighter, police officer, or teacher on duty, or for incapacitating any of these individuals A person convicted of aggravated assault can face up to 10 years in prison as a second-degree felony. However, if the crime is perpetrated against a firefighter or police officer, the offender may face first-degree felony charges carrying a penalty of up to 20 years in prison. Tennessee In Tennessee assault is defined as follows: See also Domestic violence Gay bashing Hate crime Mayhem Offences Against the Person Act 1861 Citations General and cited references External links A guide to the non fatal offences against the person Crimes

1525

https://en.wikipedia.org/wiki/Aspirin

Aspirin

Aspirin, also known as acetylsalicylic acid (ASA), is a nonsteroidal anti-inflammatory drug (NSAID) used to reduce pain, fever, and/or inflammation, and as an antithrombotic. Specific inflammatory conditions which aspirin is used to treat include Kawasaki disease, pericarditis, and rheumatic fever. Aspirin is also used long-term to help prevent further heart attacks, ischaemic strokes, and blood clots in people at high risk. For pain or fever, effects typically begin within 30 minutes. Aspirin works similarly to other NSAIDs but also suppresses the normal functioning of platelets. One common adverse effect is an upset stomach. More significant side effects include stomach ulcers, stomach bleeding, and worsening asthma. Bleeding risk is greater among those who are older, drink alcohol, take other NSAIDs, or are on other blood thinners. Aspirin is not recommended in the last part of pregnancy. It is not generally recommended in children with infections because of the risk of Reye syndrome. High doses may result in ringing in the ears. A precursor to aspirin found in the bark of the willow tree (genus Salix) has been used for its health effects for at least 2,400 years. In 1853, chemist Charles Frédéric Gerhardt treated the medicine sodium salicylate with acetyl chloride to produce acetylsalicylic acid for the first time. Over the next 50 years, other chemists established the chemical structure and devised more efficient production methods. Aspirin is available without medical prescription as a proprietary or generic medication in most jurisdictions. It is one of the most widely used medications globally, with an estimated (50 to 120 billion pills) consumed each year, and is on the World Health Organization's List of Essential Medicines. In 2020, it was the 36th most commonly prescribed medication in the United States, with more than 17million prescriptions. Brand vs. generic name In 1897, scientists at the Bayer company began studying acetylsalicylic acid as a less-irritating replacement medication for common salicylate medicines. By 1899, Bayer had named it "Aspirin" and sold it around the world. Aspirin's popularity grew over the first half of the 20th century, leading to competition between many brands and formulations. The word Aspirin was Bayer's brand name; however, their rights to the trademark were lost or sold in many countries. The name is ultimately a blend of the prefix a(cetyl) + spir Spiraea, the meadowsweet plant genus from which the acetylsalicylic acid was originally derived at Bayer + -in, the common chemical suffix. Chemical properties Aspirin decomposes rapidly in solutions of ammonium acetate or the acetates, carbonates, citrates, or hydroxides of the alkali metals. It is stable in dry air, but gradually hydrolyses in contact with moisture to acetic and salicylic acids. In solution with alkalis, the hydrolysis proceeds rapidly and the clear solutions formed may consist entirely of acetate and salicylate. Like flour mills, factories producing aspirin tablets must control the amount of the powder that becomes airborne inside the building, because the powder-air mixture can be explosive. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit in the United States of 5mg/m3 (time-weighted average). In 1989, the Occupational Safety and Health Administration (OSHA) set a legal permissible exposure limit for aspirin of 5mg/m3, but this was vacated by the AFL-CIO v. OSHA decision in 1993. Synthesis The synthesis of aspirin is classified as an esterification reaction. Salicylic acid is treated with acetic anhydride, an acid derivative, causing a chemical reaction that turns salicylic acid's hydroxyl group into an ester group (R-OH → R-OCOCH3). This process yields aspirin and acetic acid, which is considered a byproduct of this reaction. Small amounts of sulfuric acid (and occasionally phosphoric acid) are almost always used as a catalyst. This method is commonly demonstrated in undergraduate teaching labs. Reaction between acetic acid and salicylic acid can also form aspirin but this esterification reaction is reversible and the presence of water can lead to hydrolysis of the aspirin. So, an anhydrous reagent is preferred. Reaction mechanism Formulations containing high concentrations of aspirin often smell like vinegar because aspirin can decompose through hydrolysis in moist conditions, yielding salicylic and acetic acids. Physical properties Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, which melts at , and decomposes around . Its acid dissociation constant (pKa) is 3.5 at . Polymorphism Polymorphism, or the ability of a substance to form more than one crystal structure, is important in the development of pharmaceutical ingredients. Many drugs receive regulatory approval for only a single crystal form or polymorph. There was only one proven polymorph Form I of aspirin, though the existence of another polymorph was debated since the 1960s, and one report from 1981 reported that when crystallized in the presence of aspirin anhydride, the diffractogram of aspirin has weak additional peaks. Though at the time it was dismissed as mere impurity, it was, in retrospect, Form II aspirin. Form II was reported in 2005, found after attempted co-crystallization of aspirin and levetiracetam from hot acetonitrile. In form I, pairs of aspirin molecules form centrosymmetric dimers through the acetyl groups with the (acidic) methyl proton to carbonyl hydrogen bonds. In form II, each aspirin molecule forms the same hydrogen bonds, but with two neighbouring molecules instead of one. With respect to the hydrogen bonds formed by the carboxylic acid groups, both polymorphs form identical dimer structures. The aspirin polymorphs contain identical 2-dimensional sections and are therefore more precisely described as polytypes. Pure Form II aspirin could be prepared by seeding the batch with aspirin anhydrate in 15% weight. Mechanism of action Discovery of the mechanism In 1971, British pharmacologist John Robert Vane, then employed by the Royal College of Surgeons in London, showed aspirin suppressed the production of prostaglandins and thromboxanes. For this discovery he was awarded the 1982 Nobel Prize in Physiology or Medicine, jointly with Sune Bergström and Bengt Ingemar Samuelsson. Prostaglandins and thromboxanes Aspirin's ability to suppress the production of prostaglandins and thromboxanes is due to its irreversible inactivation of the cyclooxygenase (COX; officially known as prostaglandin-endoperoxide synthase, PTGS) enzyme required for prostaglandin and thromboxane synthesis. Aspirin acts as an acetylating agent where an acetyl group is covalently attached to a serine residue in the active site of the PTGS enzyme (Suicide inhibition). This makes aspirin different from other NSAIDs (such as diclofenac and ibuprofen), which are reversible inhibitors. Low-dose aspirin use irreversibly blocks the formation of thromboxane A2 in platelets, producing an inhibitory effect on platelet aggregation during the lifetime of the affected platelet (8–9 days). This antithrombotic property makes aspirin useful for reducing the incidence of heart attacks in people who have had a heart attack, unstable angina, ischemic stroke or transient ischemic attack. 40mg of aspirin a day is able to inhibit a large proportion of maximum thromboxane A2 release provoked acutely, with the prostaglandin I2 synthesis being little affected; however, higher doses of aspirin are required to attain further inhibition. Prostaglandins, local hormones produced in the body, have diverse effects, including the transmission of pain information to the brain, modulation of the hypothalamic thermostat, and inflammation. Thromboxanes are responsible for the aggregation of platelets that form blood clots. Heart attacks are caused primarily by blood clots, and low doses of aspirin are seen as an effective medical intervention to prevent a second acute myocardial infarction. COX-1 and COX-2 inhibition At least two different types of cyclooxygenases, COX-1 and COX-2, are acted on by aspirin. Aspirin irreversibly inhibits COX-1 and modifies the enzymatic activity of COX-2. COX-2 normally produces prostanoids, most of which are proinflammatory. Aspirin-modified PTGS2 (prostaglandin-endoperoxide synthase 2) produces lipoxins, most of which are anti-inflammatory. Newer NSAID drugs, COX-2 inhibitors (coxibs), have been developed to inhibit only PTGS2, with the intent to reduce the incidence of gastrointestinal side effects. Several COX-2 inhibitors, such as rofecoxib (Vioxx), have been withdrawn from the market, after evidence emerged that PTGS2 inhibitors increase the risk of heart attack and stroke. Endothelial cells lining the microvasculature in the body are proposed to express PTGS2, and, by selectively inhibiting PTGS2, prostaglandin production (specifically, PGI2; prostacyclin) is downregulated with respect to thromboxane levels, as PTGS1 in platelets is unaffected. Thus, the protective anticoagulative effect of PGI2 is removed, increasing the risk of thrombus and associated heart attacks and other circulatory problems. Since platelets have no DNA, they are unable to synthesize new PTGS once aspirin has irreversibly inhibited the enzyme, an important difference as compared with reversible inhibitors. Furthermore, aspirin, while inhibiting the ability of COX-2 to form pro-inflammatory products such as the prostaglandins, converts this enzyme's activity from a prostaglandin-forming cyclooxygenase to a lipoxygenase-like enzyme: aspirin-treated COX-2 metabolizes a variety of polyunsaturated fatty acids to hydroperoxy products which are then further metabolized to specialized proresolving mediators such as the aspirin-triggered lipoxins, aspirin-triggered resolvins, and aspirin-triggered maresins. These mediators possess potent anti-inflammatory activity. It is proposed that this aspirin-triggered transition of COX-2 from cyclooxygenase to lipoxygenase activity and the consequential formation of specialized proresolving mediators contributes to the anti-inflammatory effects of aspirin. Additional mechanisms Aspirin has been shown to have at least three additional modes of action. It uncouples oxidative phosphorylation in cartilaginous (and hepatic) mitochondria, by diffusing from the inner membrane space as a proton carrier back into the mitochondrial matrix, where it ionizes once again to release protons. Aspirin buffers and transports the protons. When high doses are given, it may actually cause fever, owing to the heat released from the electron transport chain, as opposed to the antipyretic action of aspirin seen with lower doses. In addition, aspirin induces the formation of NO-radicals in the body, which have been shown in mice to have an independent mechanism of reducing inflammation. This reduced leukocyte adhesion is an important step in the immune response to infection; however, evidence is insufficient to show aspirin helps to fight infection. More recent data also suggest salicylic acid and its derivatives modulate signalling through NF-κB. NF-κB, a transcription factor complex, plays a central role in many biological processes, including inflammation. Aspirin is readily broken down in the body to salicylic acid, which itself has anti-inflammatory, antipyretic, and analgesic effects. In 2012, salicylic acid was found to activate AMP-activated protein kinase, which has been suggested as a possible explanation for some of the effects of both salicylic acid and aspirin. The acetyl portion of the aspirin molecule has its own targets. Acetylation of cellular proteins is a well-established phenomenon in the regulation of protein function at the post-translational level. Aspirin is able to acetylate several other targets in addition to COX isoenzymes. These acetylation reactions may explain many hitherto unexplained effects of aspirin. Formulations Aspirin is produced in many formulations, with some differences in effect. In particular, aspirin can cause gastrointestinal bleeding, and formulations are sought which deliver the benefits of aspirin while mitigating harmful bleeding. Formulations may be combined (e.g., buffered + vitamin C). Tablets, typically of about 75–100 mg and 300–320 mg of immediate-release aspirin (IR-ASA). Dispersible tablets. Enteric-coated tablets. Buffered formulations containing aspirin with one of many buffering agents. Formulations of aspirin with vitamin C (ASA-VitC) A phospholipid-aspirin complex liquid formulation, PL-ASA. the phospholipid coating was being trialled to determine if it caused less gastrointestinal damage. Pharmacokinetics Acetylsalicylic acid is a weak acid, and very little of it is ionized in the stomach after oral administration. Acetylsalicylic acid is quickly absorbed through the cell membrane in the acidic conditions of the stomach. The increased pH and larger surface area of the small intestine causes aspirin to be absorbed more slowly there, as more of it is ionized. Owing to the formation of concretions, aspirin is absorbed much more slowly during overdose, and plasma concentrations can continue to rise for up to 24 hours after ingestion. About 50–80% of salicylate in the blood is bound to human serum albumin, while the rest remains in the active, ionized state; protein binding is concentration-dependent. Saturation of binding sites leads to more free salicylate and increased toxicity. The volume of distribution is 0.1–0.2 L/kg. Acidosis increases the volume of distribution because of enhancement of tissue penetration of salicylates. As much as 80% of therapeutic doses of salicylic acid is metabolized in the liver. Conjugation with glycine forms salicyluric acid, and with glucuronic acid to form two different glucuronide esters. The conjugate with the acetyl group intact is referred to as the acyl glucuronide; the deacetylated conjugate is the phenolic glucuronide. These metabolic pathways have only a limited capacity. Small amounts of salicylic acid are also hydroxylated to gentisic acid. With large salicylate doses, the kinetics switch from first-order to zero-order, as metabolic pathways become saturated and renal excretion becomes increasingly important. Salicylates are excreted mainly by the kidneys as salicyluric acid (75%), free salicylic acid (10%), salicylic phenol (10%), and acyl glucuronides (5%), gentisic acid (< 1%), and 2,3-dihydroxybenzoic acid. When small doses (less than 250mg in an adult) are ingested, all pathways proceed by first-order kinetics, with an elimination half-life of about 2.0 h to 4.5 h. When higher doses of salicylate are ingested (more than 4 g), the half-life becomes much longer (15 h to 30 h), because the biotransformation pathways concerned with the formation of salicyluric acid and salicyl phenolic glucuronide become saturated. Renal excretion of salicylic acid becomes increasingly important as the metabolic pathways become saturated, because it is extremely sensitive to changes in urinary pH. A 10- to 20-fold increase in renal clearance occurs when urine pH is increased from 5 to 8. The use of urinary alkalinization exploits this particular aspect of salicylate elimination. It was found that short-term aspirin use in therapeutic doses might precipitate reversible acute kidney injury when the patient was ill with glomerulonephritis or cirrhosis. Aspirin for some patients with chronic kidney disease and some children with congestive heart failure was contraindicated. History Medicines made from willow and other salicylate-rich plants appear in clay tablets from ancient Sumer as well as the Ebers Papyrus from ancient Egypt. Hippocrates referred to the use of salicylic tea to reduce fevers around 400 BC, and willow bark preparations were part of the pharmacopoeia of Western medicine in classical antiquity and the Middle Ages. Willow bark extract became recognized for its specific effects on fever, pain, and inflammation in the mid-eighteenth century. By the nineteenth century, pharmacists were experimenting with and prescribing a variety of chemicals related to salicylic acid, the active component of willow extract. In 1853, chemist Charles Frédéric Gerhardt treated sodium salicylate with acetyl chloride to produce acetylsalicylic acid for the first time; in the second half of the 19th century, other academic chemists established the compound's chemical structure and devised more efficient methods of synthesis. In 1897, scientists at the drug and dye firm Bayer began investigating acetylsalicylic acid as a less-irritating replacement for standard common salicylate medicines, and identified a new way to synthesize it. By 1899, Bayer had dubbed this drug Aspirin and was selling it globally. The word Aspirin was Bayer's brand name, rather than the generic name of the drug; however, Bayer's rights to the trademark were lost or sold in many countries. Aspirin's popularity grew over the first half of the 20th century leading to fierce competition with the proliferation of aspirin brands and products. Aspirin's popularity declined after the development of acetaminophen/paracetamol in 1956 and ibuprofen in 1962. In the 1960s and 1970s, John Vane and others discovered the basic mechanism of aspirin's effects, while clinical trials and other studies from the 1960s to the 1980s established aspirin's efficacy as an anti-clotting agent that reduces the risk of clotting diseases. The initial large studies on the use of low-dose aspirin to prevent heart attacks that were published in the 1970s and 1980s helped spur reform in clinical research ethics and guidelines for human subject research and US federal law, and are often cited as examples of clinical trials that included only men, but from which people drew general conclusions that did not hold true for women. Aspirin sales revived considerably in the last decades of the 20th century, and remain strong in the 21st century with widespread use as a preventive treatment for heart attacks and strokes. Trademark Bayer lost its trademark for Aspirin in the United States and some other countries in actions taken between 1918 and 1921 because it had failed to use the name for its own product correctly and had for years allowed the use of "Aspirin" by other manufacturers without defending the intellectual property rights. Today, aspirin is a generic trademark in many countries. Aspirin, with a capital "A", remains a registered trademark of Bayer in Germany, Canada, Mexico, and in over 80 other countries, for acetylsalicylic acid in all markets, but using different packaging and physical aspects for each. Compendial status United States Pharmacopeia British Pharmacopoeia Medical use Aspirin is used in the treatment of a number of conditions, including fever, pain, rheumatic fever, and inflammatory conditions, such as rheumatoid arthritis, pericarditis, and Kawasaki disease. Lower doses of aspirin have also been shown to reduce the risk of death from a heart attack, or the risk of stroke in people who are at high risk or who have cardiovascular disease, but not in elderly people who are otherwise healthy. There is evidence that aspirin is effective at preventing colorectal cancer, though the mechanisms of this effect are unclear. In the United States, the selective initiation of low-dose aspirin, based on an individualised assessment, has been deemed reasonable for the primary prevention of cardiovascular disease in people aged between 40 and 59 who have a 10% or greater risk of developing cardiovascular disease over the next 10 years and are not at an increased risk of bleeding. Pain Aspirin is an effective analgesic for acute pain, although it is generally considered inferior to ibuprofen because aspirin is more likely to cause gastrointestinal bleeding. Aspirin is generally ineffective for those pains caused by muscle cramps, bloating, gastric distension, or acute skin irritation. As with other NSAIDs, combinations of aspirin and caffeine provide slightly greater pain relief than aspirin alone. Effervescent formulations of aspirin relieve pain faster than aspirin in tablets, which makes them useful for the treatment of migraines. Topical aspirin may be effective for treating some types of neuropathic pain. Aspirin, either by itself or in a combined formulation, effectively treats certain types of a headache, but its efficacy may be questionable for others. Secondary headaches, meaning those caused by another disorder or trauma, should be promptly treated by a medical provider. Among primary headaches, the International Classification of Headache Disorders distinguishes between tension headache (the most common), migraine, and cluster headache. Aspirin or other over-the-counter analgesics are widely recognized as effective for the treatment of tension headaches. Aspirin, especially as a component of an aspirin/paracetamol/caffeine combination, is considered a first-line therapy in the treatment of migraine, and comparable to lower doses of sumatriptan. It is most effective at stopping migraines when they are first beginning. Fever Like its ability to control pain, aspirin's ability to control fever is due to its action on the prostaglandin system through its irreversible inhibition of COX. Although aspirin's use as an antipyretic in adults is well established, many medical societies and regulatory agencies, including the American Academy of Family Physicians, the American Academy of Pediatrics, and the Food and Drug Administration, strongly advise against using aspirin for the treatment of fever in children because of the risk of Reye's syndrome, a rare but often fatal illness associated with the use of aspirin or other salicylates in children during episodes of viral or bacterial infection. Because of the risk of Reye's syndrome in children, in 1986, the US Food and Drug Administration (FDA) required labeling on all aspirin-containing medications advising against its use in children and teenagers. Inflammation Aspirin is used as an anti-inflammatory agent for both acute and long-term inflammation, as well as for the treatment of inflammatory diseases, such as rheumatoid arthritis. Heart attacks and strokes Aspirin is an important part of the treatment of those who have had a heart attack. It is generally not recommended for routine use by people with no other health problems, including those over the age of 70. The 2009 Antithrombotic Trialists' Collaboration published in Lancet evaluated the efficacy and safety of low dose aspirin in secondary prevention. In those with prior ischaemic stroke or acute myocardial infarction, daily low dose aspirin was associated with a 19% relative risk reduction of serious cardiovascular events (non-fatal myocardial infarction, non-fatal stroke, or vascular death). This did come at the expense of a 0.19% absolute risk increase in gastrointestinal bleeding; however, the benefits outweigh the hazard risk in this case. Data from previous trials have suggested that weight-based dosing of aspirin has greater benefits in primary prevention of cardiovascular outcomes. However, more recent trials were not able to replicate similar outcomes using low dose aspirin in low body weight (<70 kg) in specific subset of population studied i.e. elderly and diabetic population, and more evidence is required to study the effect of high dose aspirin in high body weight (≥70 kg). After percutaneous coronary interventions (PCIs), such as the placement of a coronary artery stent, a U.S. Agency for Healthcare Research and Quality guideline recommends that aspirin be taken indefinitely. Frequently, aspirin is combined with an ADP receptor inhibitor, such as clopidogrel, prasugrel, or ticagrelor to prevent blood clots. This is called dual antiplatelet therapy (DAPT). Duration of DAPT was advised in the United States and European Union guidelines after the CURE and PRODIGY studies . In 2020, the systematic review and network meta-analysis from Khan et al. showed promising benefits of short-term (< 6 months) DAPT followed by P2Y12 inhibitors in selected patients, as well as the benefits of extended-term (> 12 months) DAPT in high risk patients. In conclusion, the optimal duration of DAPT after PCIs should be personalized after outweighing each patient's risks of ischemic events and risks of bleeding events with consideration of multiple patient-related and procedure-related factors. Moreover, aspirin should be continued indefinitely after DAPT is complete. The status of the use of aspirin for the primary prevention in cardiovascular disease is conflicting and inconsistent, with recent changes from previously recommending it widely decades ago, and that some referenced newer trials in clinical guidelines show less of benefit of adding aspirin alongside other anti-hypertensive and cholesterol lowering therapies. The ASCEND study demonstrated that in high-bleeding risk diabetics with no prior cardiovascular disease, there is no overall clinical benefit (12% decrease in risk of ischaemic events v/s 29% increase in GI bleeding) of low dose aspirin in preventing the serious vascular events over a period of 7.4 years. Similarly, the results of the ARRIVE study also showed no benefit of same dose of aspirin in reducing the time to first cardiovascular outcome in patients with moderate risk of cardiovascular disease over a period of five years. Aspirin has also been suggested as a component of a polypill for prevention of cardiovascular disease. Complicating the use of aspirin for prevention is the phenomenon of aspirin resistance. For people who are resistant, aspirin's efficacy is reduced. Some authors have suggested testing regimens to identify people who are resistant to aspirin. As of , the United States Preventive Services Task Force (USPSTF) determined that there was a "small net benefit" for patients aged 40–59 with a 10% or greater 10-year cardiovascular disease (CVD) risk, and "no net benefit" for patients aged over 60. Determining the net benefit was based on balancing the risk reduction of taking aspirin for heart attacks and ischaemic strokes, with the increased risk of gastrointestinal bleeding, intracranial bleeding, and hemorrhagic strokes. Their recommendations state that age changes the risk of the medicine, with the magnitude of the benefit of aspirin coming from starting at a younger age, while the risk of bleeding, while small, increases with age, particular for adults over 60, and can be compounded by other risk factors such as diabetes and a history of gastrointestinal bleeding. As a result, the USPSTF suggests that "people ages 40 to 59 who are at higher risk for CVD should decide with their clinician whether to start taking aspirin; people 60 or older should not start taking aspirin to prevent a first heart attack or stroke." Primary prevention guidelines from made by the American College of Cardiology and the American Heart Association state they might consider aspirin for patients aged 40–69 with a higher risk of atherosclerotic CVD, without an increased bleeding risk, while stating they would not recommend aspirin for patients aged over 70 or adults of any age with an increased bleeding risk. They state a CVD risk estimation and a risk discussion should be done before starting on aspirin, while stating aspirin should be used "infrequently in the routine primary prevention of (atherosclerotic CVD) because of lack of net benefit". As of , the European Society of Cardiology made similar recommendations; considering aspirin specifically to patients aged less than 70 at high or very high CVD risk, without any clear contraindications, on a case-by-case basis considering both ischemic risk and bleeding risk. Cancer prevention Aspirin may reduce the overall risk of both getting cancer and dying from cancer. There is substantial evidence for lowering the risk of colorectal cancer (CRC), but aspirin must be taken for at least 10–20 years to see this benefit. It may also slightly reduce the risk of endometrial cancer and prostate cancer. Some conclude the benefits are greater than the risks due to bleeding in those at average risk. Others are unclear if the benefits are greater than the risk. Given this uncertainty, the 2007 United States Preventive Services Task Force (USPSTF) guidelines on this topic recommended against the use of aspirin for prevention of CRC in people with average risk. Nine years later however, the USPSTF issued a grade B recommendation for the use of low-dose aspirin (75 to 100mg/day) "for the primary prevention of CVD [cardiovascular disease] and CRC in adults 50 to 59 years of age who have a 10% or greater 10-year CVD risk, are not at increased risk for bleeding, have a life expectancy of at least 10 years, and are willing to take low-dose aspirin daily for at least 10 years". A meta-analysis through 2019 said that there was an association between taking aspirin and lower risk of cancer of the colorectum, esophagus, and stomach. In 2021, the U.S. Preventive services Task Force raised questions about the use of aspirin in cancer prevention. It notes the results of the 2018 ASPREE (Aspirin in Reducing Events in the Elderly) Trial, in which the risk of cancer-related death was higher in the aspirin-treated group than in the placebo group. Psychiatry Bipolar disorder Aspirin, along with several other agents with anti-inflammatory properties, has been repurposed as an add-on treatment for depressive episodes in subjects with bipolar disorder in light of the possible role of inflammation in the pathogenesis of severe mental disorders. A 2022 systematic review concluded that aspirin exposure reduced the risk of depression in a pooled cohort of three studies (HR 0.624, 95% CI: 0.0503, 1.198, P=0.033). However, further high-quality, longer-duration, double-blind randomized controlled trials (RCTs) are needed to determine whether aspirin is an effective add-on treatment for bipolar depression. Thus, notwithstanding the biological rationale, the clinical perspectives of aspirin and anti-inflammatory agents in the treatment of bipolar depression remain uncertain. Dementia Although cohort and longitudinal studies have shown low-dose aspirin has a greater likelihood of reducing the incidence of dementia, numerous randomized controlled trials have not validated this. Schizophrenia Some researchers have speculated the anti-inflammatory effects of aspirin may be beneficial for schizophrenia. Small trials have been conducted but evidence remains lacking. Other uses Aspirin is a first-line treatment for the fever and joint-pain symptoms of acute rheumatic fever. The therapy often lasts for one to two weeks, and is rarely indicated for longer periods. After fever and pain have subsided, the aspirin is no longer necessary, since it does not decrease the incidence of heart complications and residual rheumatic heart disease. Naproxen has been shown to be as effective as aspirin and less toxic, but due to the limited clinical experience, naproxen is recommended only as a second-line treatment. Along with rheumatic fever, Kawasaki disease remains one of the few indications for aspirin use in children in spite of a lack of high quality evidence for its effectiveness. Low-dose aspirin supplementation has moderate benefits when used for prevention of pre-eclampsia. This benefit is greater when started in early pregnancy. Aspirin has also demonstrated anti-tumoral effects, via inhibition of the PTTG1 gene, which is often overexpressed in tumors. Resistance For some people, aspirin does not have as strong an effect on platelets as for others, an effect known as aspirin-resistance or insensitivity. One study has suggested women are more likely to be resistant than men, and a different, aggregate study of 2,930 people found 28% were resistant. A study in 100 Italian people found, of the apparent 31% aspirin-resistant subjects, only 5% were truly resistant, and the others were noncompliant. Another study of 400 healthy volunteers found no subjects who were truly resistant, but some had "pseudoresistance, reflecting delayed and reduced drug absorption". Meta-analysis and systematic reviews have concluded that laboratory confirmed aspirin resistance confers increased rates of poorer outcomes in cardiovascular and neurovascular diseases. Although the majority of research conducted has surrounded cardiovascular and neurovascular, there is emerging research into the risk of aspirin resistance after orthopaedic surgery where aspirin is used for venous thromboembolism prophylaxis. Aspirin resistance in orthopaedic surgery, specifically after total hip and knee arthroplasties, is of interest as risk factors for aspirin resistance are also risk factors for venous thromboembolisms and osteoarthritis; the sequalae of requiring a total hip or knee arthroplasty. Some of these risk factors include obesity, advancing age, diabetes mellitus, dyslipidaemia and inflammatory diseases. Dosages Adult aspirin tablets are produced in standardised sizes, which vary slightly from country to country, for example 300mg in Britain and 325mg in the United States. Smaller doses are based on these standards, e.g., 75mg and 81mg tablets. The 81 mg tablets are commonly called "baby aspirin" or "baby-strength", because they were originallybut no longerintended to be administered to infants and children. No medical significance occurs due to the slight difference in dosage between the 75mg and the 81mg tablets. The dose required for benefit appears to depend on a person's weight. For those weighing less than , low dose is effective for preventing cardiovascular disease; for patients above this weight, higher doses are required. In general, for adults, doses are taken four times a day for fever or arthritis, with doses near the maximal daily dose used historically for the treatment of rheumatic fever. For the prevention of myocardial infarction (MI) in someone with documented or suspected coronary artery disease, much lower doses are taken once daily. March 2009 recommendations from the USPSTF on the use of aspirin for the primary prevention of coronary heart disease encourage men aged 45–79 and women aged 55–79 to use aspirin when the potential benefit of a reduction in MI for men or stroke for women outweighs the potential harm of an increase in gastrointestinal hemorrhage. The WHI study of postmenopausal women found that aspirin resulted in a 25% lower risk of death from cardiovascular disease and a 14% lower risk of death from any cause, though there was no significant difference between 81mg and 325mg aspirin doses. The 2021 ADAPTABLE study also showed no significant difference in cardiovascular events or major bleeding between 81mg and 325mg doses of aspirin in patients (both men and women) with established cardiovascular disease. Low-dose aspirin use was also associated with a trend toward lower risk of cardiovascular events, and lower aspirin doses (75 or 81mg/day) may optimize efficacy and safety for people requiring aspirin for long-term prevention. In children with Kawasaki disease, aspirin is taken at dosages based on body weight, initially four times a day for up to two weeks and then at a lower dose once daily for a further six to eight weeks. Adverse effects In October 2020, the US Food and Drug Administration (FDA) required the drug label to be updated for all nonsteroidal anti-inflammatory medications to describe the risk of kidney problems in unborn babies that result in low amniotic fluid. They recommend avoiding NSAIDs in pregnant women at 20 weeks or later in pregnancy. One exception to the recommendation is the use of low-dose 81mg aspirin at any point in pregnancy under the direction of a health care professional. Contraindications Aspirin should not be taken by people who are allergic to ibuprofen or naproxen, or who have salicylate intolerance or a more generalized drug intolerance to NSAIDs, and caution should be exercised in those with asthma or NSAID-precipitated bronchospasm. Owing to its effect on the stomach lining, manufacturers recommend people with peptic ulcers, mild diabetes, or gastritis seek medical advice before using aspirin. Even if none of these conditions is present, the risk of stomach bleeding is still increased when aspirin is taken with alcohol or warfarin. People with hemophilia or other bleeding tendencies should not take aspirin or other salicylates. Aspirin is known to cause hemolytic anemia in people who have the genetic disease glucose-6-phosphate dehydrogenase deficiency, particularly in large doses and depending on the severity of the disease. Use of aspirin during dengue fever is not recommended owing to increased bleeding tendency. Aspirin taken at doses of ≤325 mg and ≤100 mg per day for ≥2 days can increase the odds of suffering a gout attack by 81% and 91% respectively. This effect may potentially be worsened by high purine diets, diuretics, and kidney disease, but is eliminated by the urate lowering drug allopurinol. Daily low dose aspirin does not appear to worsen kidney function. Aspirin may reduce cardiovascular risk in those without established cardiovascular disease in people with moderate CKD, without significantly increasing the risk of bleeding. Aspirin should not be given to children or adolescents under the age of 16 to control cold or influenza symptoms, as this has been linked with Reye's syndrome. Gastrointestinal Aspirin use has been shown to increase the risk of gastrointestinal bleeding. Although some enteric-coated formulations of aspirin are advertised as being "gentle to the stomach", in one study, enteric coating did not seem to reduce this risk; the Mayo Clinic agree with this, and report that coated aspirin may also not be as effective at reducing blood clot risk. Although enteric coated aspirin is said to be not as effective as plain aspirin in reducing blood clot risk, however, with the current available results from clinical studies, there is still insufficient data to support this statement. Larger studies are required to provide more accurate results and conclusions. Combining aspirin with other NSAIDs has been shown to further increase the risk of gastrointestinal bleeding. Using aspirin in combination with clopidogrel or warfarin also increases the risk of upper gastrointestinal bleeding. Blockade of COX-1 by aspirin apparently results in the upregulation of COX-2 as part of a gastric defense. Several trials suggest that the simultaneous use of a COX-2 inhibitor with aspirin may increase the risk of gastrointestinal injury. However, currently available evidence has been unable to prove that this effect is consistently repeatable in everyday clinical practice. More dedicated research is required to provide greater clarity on the subject. Therefore, caution should be exercised if combining aspirin with any "natural" supplements with COX-2-inhibiting properties, such as garlic extracts, curcumin, bilberry, pine bark, ginkgo, fish oil, resveratrol, genistein, quercetin, resorcinol, and others. "Buffering" is an additional method that is used with the intention of mitigating gastrointestinal bleeding. Buffering agents are intended to work by preventing the aspirin from concentrating in the walls of the stomach, although the benefits of buffered aspirin are disputed. Almost any buffering agent used in antacids can be used; Bufferin, for example, uses magnesium oxide. Other preparations use calcium carbonate. Gas-forming agents in effervescent tablet and powder formulations can also double as a buffering agent, one example being sodium bicarbonate, used in Alka-Seltzer. Taking vitamin C with aspirin has been investigated as a method of protecting the stomach lining. In trials vitamin C-releasing aspirin (ASA-VitC) or a buffered aspirin formulation containing vitamin C was found to cause less stomach damage than aspirin alone. Retinal vein occlusion It is a widespread habit among eye specialists (ophthalmologists) to prescribe aspirin as an add-on medication for patients with retinal vein occlusion (RVO), such as central retinal vein occlusion (CRVO) and branch retinal vein occlusion (BRVO). The reason of this widespread use is the evidence of its proven effectiveness in major systemic venous thrombotic disorders, and it has been assumed that may be similarly beneficial in various types of retinal vein occlusion. However, a large-scale investigation based on data of nearly 700 patients showed "that aspirin or other antiplatelet aggregating agents or anticoagulants adversely influence the visual outcome in patients with CRVO and hemi-CRVO, without any evidence of protective or beneficial effect". Several expert groups, including the Royal College of Ophthalmologists, recommended against the use of antithrombotic drugs (incl. aspirin) for patients with RVO. Central effects Large doses of salicylate, a metabolite of aspirin, cause temporary tinnitus (ringing in the ears) based on experiments in rats, via the action on arachidonic acid and NMDA receptors cascade. Reye's syndrome Reye's syndrome, a rare but severe illness characterized by acute encephalopathy and fatty liver, can occur when children or adolescents are given aspirin for a fever or other illness or infection. From 1981 to 1997, 1207 cases of Reye's syndrome in people younger than 18 were reported to the US Centers for Disease Control and Prevention (CDC). Of these, 93% reported being ill in the three weeks preceding the onset of Reye's syndrome, most commonly with a respiratory infection, chickenpox, or diarrhea. Salicylates were detectable in 81.9% of children for whom test results were reported. After the association between Reye's syndrome and aspirin was reported, and safety measures to prevent it (including a Surgeon General's warning, and changes to the labeling of aspirin-containing drugs) were implemented, aspirin taken by children declined considerably in the United States, as did the number of reported cases of Reye's syndrome; a similar decline was found in the United Kingdom after warnings against pediatric aspirin use were issued. The US Food and Drug Administration recommends aspirin (or aspirin-containing products) should not be given to anyone under the age of 12 who has a fever, and the UK National Health Service recommends children who are under 16 years of age should not take aspirin, unless it is on the advice of a doctor. Skin For a small number of people, taking aspirin can result in symptoms including hives, swelling, and headache. Aspirin can exacerbate symptoms among those with chronic hives, or create acute symptoms of hives. These responses can be due to allergic reactions to aspirin, or more often due to its effect of inhibiting the COX-1 enzyme. Skin reactions may also tie to systemic contraindications, seen with NSAID-precipitated bronchospasm, or those with atopy. Aspirin and other NSAIDs, such as ibuprofen, may delay the healing of skin wounds. Earlier findings from two small, low-quality trials suggested a benefit with aspirin (alongside compression therapy) on venous leg ulcer healing time and leg ulcer size, however larger, more recent studies of higher quality have been unable to corroborate these outcomes. As such, further research is required to clarify the role of aspirin in this context. Other adverse effects Aspirin can induce swelling of skin tissues in some people. In one study, angioedema appeared one to six hours after ingesting aspirin in some of the people. However, when the aspirin was taken alone, it did not cause angioedema in these people; the aspirin had been taken in combination with another NSAID-induced drug when angioedema appeared. Aspirin causes an increased risk of cerebral microbleeds having the appearance on MRI scans of 5 to 10mm or smaller, hypointense (dark holes) patches. A study of a group with a mean dosage of aspirin of 270mg per day estimated an average absolute risk increase in intracerebral hemorrhage (ICH) of 12 events per 10,000 persons. In comparison, the estimated absolute risk reduction in myocardial infarction was 137 events per 10,000 persons, and a reduction of 39 events per 10,000 persons in ischemic stroke. In cases where ICH already has occurred, aspirin use results in higher mortality, with a dose of about 250mg per day resulting in a relative risk of death within three months after the ICH around 2.5 (95% confidence interval 1.3 to 4.6). Aspirin and other NSAIDs can cause abnormally high blood levels of potassium by inducing a hyporeninemic hypoaldosteronic state via inhibition of prostaglandin synthesis; however, these agents do not typically cause hyperkalemia by themselves in the setting of normal renal function and euvolemic state. Use of low-dose aspirin before a surgical procedure has been associated with an increased risk of bleeding events in some patients, however, ceasing aspirin prior to surgery has also been associated with an increase in major adverse cardiac events. An analysis of multiple studies found a three-fold increase in adverse events such as myocardial infarction in patients who ceased aspirin prior to surgery. The analysis found that the risk is dependent on the type of surgery being performed and the patient indication for aspirin use. On 9 July 2015, the US Food and Drug Administration (FDA) toughened warnings of increased heart attack and stroke risk associated with nonsteroidal anti-inflammatory drugs (NSAID). Aspirin is an NSAID but is not affected by the new warnings. Overdose Aspirin overdose can be acute or chronic. In acute poisoning, a single large dose is taken; in chronic poisoning, higher than normal doses are taken over a period of time. Acute overdose has a mortality rate of 2%. Chronic overdose is more commonly lethal, with a mortality rate of 25%; chronic overdose may be especially severe in children. Toxicity is managed with a number of potential treatments, including activated charcoal, intravenous dextrose and normal saline, sodium bicarbonate, and dialysis. The diagnosis of poisoning usually involves measurement of plasma salicylate, the active metabolite of aspirin, by automated spectrophotometric methods. Plasma salicylate levels in general range from 30 to 100mg/L after usual therapeutic doses, 50–300mg/L in people taking high doses and 700–1400mg/L following acute overdose. Salicylate is also produced as a result of exposure to bismuth subsalicylate, methyl salicylate, and sodium salicylate. Interactions Aspirin is known to interact with other drugs. For example, acetazolamide and ammonium chloride are known to enhance the intoxicating effect of salicylates, and alcohol also increases the gastrointestinal bleeding associated with these types of drugs. Aspirin is known to displace a number of drugs from protein-binding sites in the blood, including the antidiabetic drugs tolbutamide and chlorpropamide, warfarin, methotrexate, phenytoin, probenecid, valproic acid (as well as interfering with beta oxidation, an important part of valproate metabolism), and other NSAIDs. Corticosteroids may also reduce the concentration of aspirin. Other NSAIDs, such as ibuprofen and naproxen, may reduce the antiplatelet effect of aspirin. Although limited evidence suggests this may not result in a reduced cardioprotective effect of aspirin. Analgesic doses of aspirin decrease sodium loss induced by spironolactone in the urine, however this does not reduce the antihypertensive effects of spironolactone. Furthermore, antiplatelet doses of aspirin are deemed too small to produce an interaction with spironolactone. Aspirin is known to compete with penicillin G for renal tubular secretion. Aspirin may also inhibit the absorption of vitamin C. Research The ISIS-2 trial demonstrated that aspirin at doses of 160mg daily for one month, decreased the mortality by 21% of participants with a suspected myocardial infarction in the first five weeks. A single daily dose of 324mg of aspirin for 12 weeks has a highly protective effect against acute myocardial infarction and death in men with unstable angina. Bipolar disorder Aspirin has been repurposed as an add-on treatment for depressive episodes in subjects with bipolar disorder. However, meta-analytic evidence is based on very few studies and does not suggest any efficacy of aspirin in the treatment of bipolar depression. Thus, notwithstanding the biological rationale, the clinical perspectives of aspirin and anti-inflammatory agents in the treatment of bipolar depression remain uncertain. Infectious diseases Several studies investigated the anti-infective properties of aspirin for bacterial, viral and parasitic infections. Aspirin was demonstrated to limit platelet activation induced by Staphylococcus aureus and Enterococcus faecalis and to reduce streptococcal adhesion to heart valves. In patients with tuberculous meningitis, the addition of aspirin reduced the risk of new cerebral infarction [RR = 0.52 (0.29-0.92)]. A role of aspirin on bacterial and fungal biofilm is also being supported by growing evidence. Cancer prevention Evidence from observational studies were conflicting on the effect of aspirin in breast cancer prevention, a randomized controlled trial showed that aspirin had no significant effect in reducing breast cancer thus further studies are needed to clarify aspirin effect in cancer prevention. In gardening There are a many anecdotal reportings that aspirin can improve plant's growth and resistance though most research involved salicylic acid instead of aspirin. Veterinary medicine Aspirin is sometimes used in veterinary medicine as an anticoagulant or to relieve pain associated with musculoskeletal inflammation or osteoarthritis. Aspirin should only be given to animals under the direct supervision of a veterinarian, as adverse effects—including gastrointestinal issues—are common. An aspirin overdose in any species may result in salicylate poisoning, characterized by hemorrhaging, seizures, coma, and even death. Dogs are better able to tolerate aspirin than cats are. Cats metabolize aspirin slowly because they lack the glucuronide conjugates that aid in the excretion of aspirin, making it potentially toxic if dosing is not spaced out properly. No clinical signs of toxicosis occurred when cats were given 25mg/kg of aspirin every 48 hours for 4 weeks, but the recommended dose for relief of pain and fever and for treating blood clotting diseases in cats is 10mg/kg every 48 hours to allow for metabolization. See also Fluoroaspirin References Further reading External links 1897 in Germany 1897 in science Acetate esters Acetylsalicylic acids Antiplatelet drugs Bayer brands Brands that became generic Chemical substances for emergency medicine Commercialization of traditional medicines Covalent inhibitors Equine medications German inventions Hepatotoxins Nonsteroidal anti-inflammatory drugs Salicylic acids Salicylyl esters World Health Organization essential medicines Wikipedia medicine articles ready to translate

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https://en.wikipedia.org/wiki/Acupuncture

Acupuncture

Acupuncture is a form of alternative medicine and a component of traditional Chinese medicine (TCM) in which thin needles are inserted into the body. Acupuncture is a pseudoscience; the theories and practices of TCM are not based on scientific knowledge, and it has been characterized as quackery. There is a range of acupuncture variants which originated in different philosophies, and techniques vary depending on the country in which it is performed. However, it can be divided into two main foundational philosophical applications and approaches; the first form being the modern standardized form called eight principles TCM and the second an older system that is based on the ancient Daoist wuxing, better known as the five elements or phases in the West. Acupuncture is most often used to attempt pain relief, though acupuncturists say that it can also be used for a wide range of other conditions. Acupuncture is generally used only in combination with other forms of treatment. The global acupuncture market was worth US$24.55 billion in 2017. The market was led by Europe with a 32.7% share, followed by Asia-Pacific with a 29.4% share and the Americas with a 25.3% share. It was estimated in 2021 that the industry would reach a market size of $55bn by 2023. The conclusions of trials and systematic reviews of acupuncture generally provide no good evidence of benefit, which suggests that it is not an effective method of healthcare. Acupuncture is generally safe when done by appropriately trained practitioners using clean needle technique and single-use needles. When properly delivered, it has a low rate of mostly minor adverse effects. When accidents and infections do occur, they are associated with neglect on the part of the practitioner, particularly in the application of sterile techniques. A review conducted in 2013 stated that reports of infection transmission increased significantly in the preceding decade. The most frequently reported adverse events were pneumothorax and infections. Since serious adverse events continue to be reported, it is recommended that acupuncturists be trained sufficiently to reduce the risk. Scientific investigation has not found any histological or physiological evidence for traditional Chinese concepts such as qi, meridians, and acupuncture points, and many modern practitioners no longer support the existence of life force energy (qi) or meridians, which was a major part of early belief systems. Acupuncture is believed to have originated around 100 BC in China, around the time The Inner Classic of Huang Di (Huangdi Neijing) was published, though some experts suggest it could have been practiced earlier. Over time, conflicting claims and belief systems emerged about the effect of lunar, celestial and earthly cycles, yin and yang energies, and a body's "rhythm" on the effectiveness of treatment. Acupuncture fluctuated in popularity in China due to changes in the country's political leadership and the preferential use of rationalism or scientific medicine. Acupuncture spread first to Korea in the 6th century AD, then to Japan through medical missionaries, and then to Europe, beginning with France. In the 20th century, as it spread to the United States and Western countries, spiritual elements of acupuncture that conflicted with scientific knowledge were sometimes abandoned in favor of simply tapping needles into acupuncture points. Clinical practice Acupuncture is a form of alternative medicine. It is used most commonly for pain relief, though it is also used to treat a wide range of conditions. Acupuncture is generally only used in combination with other forms of treatment. For example, the American Society of Anesthesiologists states it may be considered in the treatment for nonspecific, noninflammatory low back pain only in conjunction with conventional therapy. Acupuncture is the insertion of thin needles into the skin. According to the Mayo Foundation for Medical Education and Research (Mayo Clinic), a typical session entails lying still while approximately five to twenty needles are inserted; for the majority of cases, the needles will be left in place for ten to twenty minutes. It can be associated with the application of heat, pressure, or laser light. Classically, acupuncture is individualized and based on philosophy and intuition, and not on scientific research. There is also a non-invasive therapy developed in early 20th century Japan using an elaborate set of instruments other than needles for the treatment of children (shōnishin or shōnihari). Clinical practice varies depending on the country. A comparison of the average number of patients treated per hour found significant differences between China (10) and the United States (1.2). Chinese herbs are often used. There is a diverse range of acupuncture approaches, involving different philosophies. Although various different techniques of acupuncture practice have emerged, the method used in traditional Chinese medicine (TCM) seems to be the most widely adopted in the US. Traditional acupuncture involves needle insertion, moxibustion, and cupping therapy, and may be accompanied by other procedures such as feeling the pulse and other parts of the body and examining the tongue. Traditional acupuncture involves the belief that a "life force" (qi) circulates within the body in lines called meridians. The main methods practiced in the UK are TCM and Western medical acupuncture. The term Western medical acupuncture is used to indicate an adaptation of TCM-based acupuncture which focuses less on TCM. The Western medical acupuncture approach involves using acupuncture after a medical diagnosis. Limited research has compared the contrasting acupuncture systems used in various countries for determining different acupuncture points and thus there is no defined standard for acupuncture points. In traditional acupuncture, the acupuncturist decides which points to treat by observing and questioning the patient to make a diagnosis according to the tradition used. In TCM, the four diagnostic methods are: inspection, auscultation and olfaction, inquiring, and palpation. Inspection focuses on the face and particularly on the tongue, including analysis of the tongue size, shape, tension, color and coating, and the absence or presence of teeth marks around the edge. Auscultation and olfaction involve listening for particular sounds such as wheezing, and observing body odor. Inquiring involves focusing on the "seven inquiries": chills and fever; perspiration; appetite, thirst and taste; defecation and urination; pain; sleep; and menses and leukorrhea. Palpation is focusing on feeling the body for tender "A-shi" points and feeling the pulse. Needles The most common mechanism of stimulation of acupuncture points employs penetration of the skin by thin metal needles, which are manipulated manually or the needle may be further stimulated by electrical stimulation (electroacupuncture). Acupuncture needles are typically made of stainless steel, making them flexible and preventing them from rusting or breaking. Needles are usually disposed of after each use to prevent contamination. Reusable needles when used should be sterilized between applications. In many areas, only sterile, single-use acupuncture needles are allowed, including the State of California, USA. Needles vary in length between , with shorter needles used near the face and eyes, and longer needles in areas with thicker tissues; needle diameters vary from 0 to 0, with thicker needles used on more robust patients. Thinner needles may be flexible and require tubes for insertion. The tip of the needle should not be made too sharp to prevent breakage, although blunt needles cause more pain. Apart from the usual filiform needle, other needle types include three-edged needles and the Nine Ancient Needles. Japanese acupuncturists use extremely thin needles that are used superficially, sometimes without penetrating the skin, and surrounded by a guide tube (a 17th-century invention adopted in China and the West). Korean acupuncture uses copper needles and has a greater focus on the hand. Needling technique Insertion The skin is sterilized and needles are inserted, frequently with a plastic guide tube. Needles may be manipulated in various ways, including spinning, flicking, or moving up and down relative to the skin. Since most pain is felt in the superficial layers of the skin, a quick insertion of the needle is recommended. Often the needles are stimulated by hand in order to cause a dull, localized, aching sensation that is called de qi, as well as "needle grasp," a tugging feeling felt by the acupuncturist and generated by a mechanical interaction between the needle and skin. Acupuncture can be painful. The acupuncturist's skill level may influence the painfulness of the needle insertion; a sufficiently skilled practitioner may be able to insert the needles without causing any pain. De-qi sensation De-qi (; "arrival of qi") refers to a claimed sensation of numbness, distension, or electrical tingling at the needling site. If these sensations are not observed then inaccurate location of the acupoint, improper depth of needle insertion, inadequate manual manipulation, are blamed. If de-qi is not immediately observed upon needle insertion, various manual manipulation techniques are often applied to promote it (such as "plucking", "shaking" or "trembling"). Once de-qi is observed, techniques might be used which attempt to "influence" the de-qi; for example, by certain manipulation the de-qi can allegedly be conducted from the needling site towards more distant sites of the body. Other techniques aim at "tonifying" () or "sedating" () qi. The former techniques are used in deficiency patterns, the latter in excess patterns. De qi is more important in Chinese acupuncture, while Western and Japanese patients may not consider it a necessary part of the treatment. Related practices Acupressure, a non-invasive form of bodywork, uses physical pressure applied to acupressure points by the hand or elbow, or with various devices. Acupuncture is often accompanied by moxibustion, the burning of cone-shaped preparations of moxa (made from dried mugwort) on or near the skin, often but not always near or on an acupuncture point. Traditionally, acupuncture was used to treat acute conditions while moxibustion was used for chronic diseases. Moxibustion could be direct (the cone was placed directly on the skin and allowed to burn the skin, producing a blister and eventually a scar), or indirect (either a cone of moxa was placed on a slice of garlic, ginger or other vegetable, or a cylinder of moxa was held above the skin, close enough to either warm or burn it). Cupping therapy is an ancient Chinese form of alternative medicine in which a local suction is created on the skin; practitioners believe this mobilizes blood flow in order to promote healing. Tui na is a TCM method of attempting to stimulate the flow of qi by various bare-handed techniques that do not involve needles. Electroacupuncture is a form of acupuncture in which acupuncture needles are attached to a device that generates continuous electric pulses (this has been described as "essentially transdermal electrical nerve stimulation [TENS] masquerading as acupuncture"). Fire needle acupuncture also known as fire needling is a technique which involves quickly inserting a flame-heated needle into areas on the body. Sonopuncture is a stimulation of the body similar to acupuncture using sound instead of needles. This may be done using purpose-built transducers to direct a narrow ultrasound beam to a depth of 6–8 centimetres at acupuncture meridian points on the body. Alternatively, tuning forks or other sound emitting devices are used. Acupuncture point injection is the injection of various substances (such as drugs, vitamins or herbal extracts) into acupoints. This technique combines traditional acupuncture with injection of what is often an effective dose of an approved pharmaceutical drug, and proponents claim that it may be more effective than either treatment alone, especially for the treatment of some kinds of chronic pain. However, a 2016 review found that most published trials of the technique were of poor value due to methodology issues and larger trials would be needed to draw useful conclusions. Auriculotherapy, commonly known as ear acupuncture, auricular acupuncture, or auriculoacupuncture, is considered to date back to ancient China. It involves inserting needles to stimulate points on the outer ear. The modern approach was developed in France during the early 1950s. There is no scientific evidence that it can cure disease; the evidence of effectiveness is negligible. Scalp acupuncture, developed in Japan, is based on reflexological considerations regarding the scalp. Koryo hand acupuncture, developed in Korea, centers around assumed reflex zones of the hand. Medical acupuncture attempts to integrate reflexological concepts, the trigger point model, and anatomical insights (such as dermatome distribution) into acupuncture practice, and emphasizes a more formulaic approach to acupuncture point location. Cosmetic acupuncture is the use of acupuncture in an attempt to reduce wrinkles on the face. Bee venom acupuncture is a treatment approach of injecting purified, diluted bee venom into acupoints. Veterinary acupuncture is the use of acupuncture on domesticated animals. Efficacy many thousands of papers had been published on the efficacy of acupuncture for the treatment of various adult health conditions, but there was no robust evidence it was beneficial for anything, except shoulder pain and fibromyalgia. For Science-Based Medicine, Steven Novella wrote that the overall pattern of evidence was reminiscent of that for homeopathy, compatible with the hypothesis that most, if not all, benefits were due to the placebo effect, and strongly suggestive that acupuncture had no beneficial therapeutic effects at all. Research methodology and challenges Sham acupuncture and research It is difficult but not impossible to design rigorous research trials for acupuncture. Due to acupuncture's invasive nature, one of the major challenges in efficacy research is in the design of an appropriate placebo control group. For efficacy studies to determine whether acupuncture has specific effects, "sham" forms of acupuncture where the patient, practitioner, and analyst are blinded seem the most acceptable approach. Sham acupuncture uses non-penetrating needles or needling at non-acupuncture points, e.g. inserting needles on meridians not related to the specific condition being studied, or in places not associated with meridians. The under-performance of acupuncture in such trials may indicate that therapeutic effects are due entirely to non-specific effects, or that the sham treatments are not inert, or that systematic protocols yield less than optimal treatment. A 2014 review in Nature Reviews Cancer found that "contrary to the claimed mechanism of redirecting the flow of qi through meridians, researchers usually find that it generally does not matter where the needles are inserted, how often (that is, no dose-response effect is observed), or even if needles are actually inserted. In other words, 'sham' or 'placebo' acupuncture generally produces the same effects as 'real' acupuncture and, in some cases, does better." A 2013 meta-analysis found little evidence that the effectiveness of acupuncture on pain (compared to sham) was modified by the location of the needles, the number of needles used, the experience or technique of the practitioner, or by the circumstances of the sessions. The same analysis also suggested that the number of needles and sessions is important, as greater numbers improved the outcomes of acupuncture compared to non-acupuncture controls. There has been little systematic investigation of which components of an acupuncture session may be important for any therapeutic effect, including needle placement and depth, type and intensity of stimulation, and number of needles used. The research seems to suggest that needles do not need to stimulate the traditionally specified acupuncture points or penetrate the skin to attain an anticipated effect (e.g. psychosocial factors). A response to "sham" acupuncture in osteoarthritis may be used in the elderly, but placebos have usually been regarded as deception and thus unethical. However, some physicians and ethicists have suggested circumstances for applicable uses for placebos such as it might present a theoretical advantage of an inexpensive treatment without adverse reactions or interactions with drugs or other medications. As the evidence for most types of alternative medicine such as acupuncture is far from strong, the use of alternative medicine in regular healthcare can present an ethical question. Using the principles of evidence-based medicine to research acupuncture is controversial, and has produced different results. Some research suggests acupuncture can alleviate pain but the majority of research suggests that acupuncture's effects are mainly due to placebo. Evidence suggests that any benefits of acupuncture are short-lasting. There is insufficient evidence to support use of acupuncture compared to mainstream medical treatments. Acupuncture is not better than mainstream treatment in the long term. The use of acupuncture has been criticized owing to there being little scientific evidence for explicit effects, or the mechanisms for its supposed effectiveness, for any condition that is discernible from placebo. Acupuncture has been called 'theatrical placebo', and David Gorski argues that when acupuncture proponents advocate 'harnessing of placebo effects' or work on developing 'meaningful placebos', they essentially concede it is little more than that. Publication bias Publication bias is cited as a concern in the reviews of randomized controlled trials of acupuncture. A 1998 review of studies on acupuncture found that trials originating in China, Japan, Hong Kong, and Taiwan were uniformly favourable to acupuncture, as were ten out of eleven studies conducted in Russia. A 2011 assessment of the quality of randomized controlled trials on traditional Chinese medicine, including acupuncture, concluded that the methodological quality of most such trials (including randomization, experimental control, and blinding) was generally poor, particularly for trials published in Chinese journals (though the quality of acupuncture trials was better than the trials testing traditional Chinese medicine remedies). The study also found that trials published in non-Chinese journals tended to be of higher quality. Chinese authors use more Chinese studies, which have been demonstrated to be uniformly positive. A 2012 review of 88 systematic reviews of acupuncture published in Chinese journals found that less than half of these reviews reported testing for publication bias, and that the majority of these reviews were published in journals with impact factors of zero. A 2015 study comparing pre-registered records of acupuncture trials with their published results found that it was uncommon for such trials to be registered before the trial began. This study also found that selective reporting of results and changing outcome measures to obtain statistically significant results was common in this literature. Scientist and journalist Steven Salzberg identifies acupuncture and Chinese medicine generally as a focus for "fake medical journals" such as the Journal of Acupuncture and Meridian Studies and Acupuncture in Medicine. Safety Adverse events Acupuncture is generally safe when administered by an experienced, appropriately trained practitioner using clean-needle technique and sterile single-use needles. When improperly delivered it can cause adverse effects. Accidents and infections are associated with infractions of sterile technique or neglect on the part of the practitioner. To reduce the risk of serious adverse events after acupuncture, acupuncturists should be trained sufficiently. A 2009 overview of Cochrane reviews found acupuncture is not effective for a wide range of conditions. People with serious spinal disease, such as cancer or infection, are not good candidates for acupuncture. Contraindications to acupuncture (conditions that should not be treated with acupuncture) include coagulopathy disorders (e.g. hemophilia and advanced liver disease), warfarin use, severe psychiatric disorders (e.g. psychosis), and skin infections or skin trauma (e.g. burns). Further, electroacupuncture should be avoided at the spot of implanted electrical devices (such as pacemakers). A 2011 systematic review of systematic reviews (internationally and without language restrictions) found that serious complications following acupuncture continue to be reported. Between 2000 and 2009, ninety-five cases of serious adverse events, including five deaths, were reported. Many such events are not inherent to acupuncture but are due to malpractice of acupuncturists. This might be why such complications have not been reported in surveys of adequately trained acupuncturists. Most such reports originate from Asia, which may reflect the large number of treatments performed there or a relatively higher number of poorly trained Asian acupuncturists. Many serious adverse events were reported from developed countries. These included Australia, Austria, Canada, Croatia, France, Germany, Ireland, the Netherlands, New Zealand, Spain, Sweden, Switzerland, the UK, and the US. The number of adverse effects reported from the UK appears particularly unusual, which may indicate less under-reporting in the UK than other countries. Reports included 38 cases of infections and 42 cases of organ trauma. The most frequent adverse events included pneumothorax, and bacterial and viral infections. A 2013 review found (without restrictions regarding publication date, study type or language) 295 cases of infections; mycobacterium was the pathogen in at least 96%. Likely sources of infection include towels, hot packs or boiling tank water, and reusing reprocessed needles. Possible sources of infection include contaminated needles, reusing personal needles, a person's skin containing mycobacterium, and reusing needles at various sites in the same person. Although acupuncture is generally considered a safe procedure, a 2013 review stated that the reports of infection transmission increased significantly in the prior decade, including those of mycobacterium. Although it is recommended that practitioners of acupuncture use disposable needles, the reuse of sterilized needles is still permitted. It is also recommended that thorough control practices for preventing infection be implemented and adapted. English-language A 2013 systematic review of the English-language case reports found that serious adverse events associated with acupuncture are rare, but that acupuncture is not without risk. Between 2000 and 2011 the English-language literature from 25 countries and regions reported 294 adverse events. The majority of the reported adverse events were relatively minor, and the incidences were low. For example, a prospective survey of 34,000 acupuncture treatments found no serious adverse events and 43 minor ones, a rate of 1.3 per 1000 interventions. Another survey found there were 7.1% minor adverse events, of which 5 were serious, amid 97,733 acupuncture patients. The most common adverse effect observed was infection (e.g. mycobacterium), and the majority of infections were bacterial in nature, caused by skin contact at the needling site. Infection has also resulted from skin contact with unsterilized equipment or with dirty towels in an unhygienic clinical setting. Other adverse complications included five reported cases of spinal cord injuries (e.g. migrating broken needles or needling too deeply), four brain injuries, four peripheral nerve injuries, five heart injuries, seven other organ and tissue injuries, bilateral hand edema, epithelioid granuloma, pseudolymphoma, argyria, pustules, pancytopenia, and scarring due to hot-needle technique. Adverse reactions from acupuncture, which are unusual and uncommon in typical acupuncture practice, included syncope, galactorrhoea, bilateral nystagmus, pyoderma gangrenosum, hepatotoxicity, eruptive lichen planus, and spontaneous needle migration. A 2013 systematic review found 31 cases of vascular injuries caused by acupuncture, three causing death. Two died from pericardial tamponade and one was from an aortoduodenal fistula. The same review found vascular injuries were rare, bleeding and pseudoaneurysm were most prevalent. A 2011 systematic review (without restriction in time or language), aiming to summarize all reported case of cardiac tamponade after acupuncture, found 26 cases resulting in 14 deaths, with little doubt about cause in most fatal instances. The same review concluded that cardiac tamponade was a serious, usually fatal, though theoretically avoidable complication following acupuncture, and urged training to minimize risk. A 2012 review found that a number of adverse events were reported after acupuncture in the UK's National Health Service (NHS), 95% of which were not severe, though miscategorization and under-reporting may alter the total figures. From January 2009 to December 2011, 468 safety incidents were recognized within the NHS organizations. The adverse events recorded included retained needles (31%), dizziness (30%), loss of consciousness/unresponsive (19%), falls (4%), bruising or soreness at needle site (2%), pneumothorax (1%) and other adverse side effects (12%). Acupuncture practitioners should know, and be prepared to be responsible for, any substantial harm from treatments. Some acupuncture proponents argue that the long history of acupuncture suggests it is safe. However, there is an increasing literature on adverse events (e.g. spinal-cord injury). Acupuncture seems to be safe in people getting anticoagulants, assuming needles are used at the correct location and depth, but studies are required to verify these findings. Chinese, Korean, and Japanese-language A 2010 systematic review of the Chinese-language literature found numerous acupuncture-related adverse events, including pneumothorax, fainting, subarachnoid hemorrhage, and infection as the most frequent, and cardiovascular injuries, subarachnoid hemorrhage, pneumothorax, and recurrent cerebral hemorrhage as the most serious, most of which were due to improper technique. Between 1980 and 2009, the Chinese-language literature reported 479 adverse events. Prospective surveys show that mild, transient acupuncture-associated adverse events ranged from 6.71% to 15%. In a study with 190,924 patients, the prevalence of serious adverse events was roughly 0.024%. Another study showed a rate of adverse events requiring specific treatment of 2.2%, 4,963 incidences among 229,230 patients. Infections, mainly hepatitis, after acupuncture are reported often in English-language research, though are rarely reported in Chinese-language research, making it plausible that acupuncture-associated infections have been underreported in China. Infections were mostly caused by poor sterilization of acupuncture needles. Other adverse events included spinal epidural hematoma (in the cervical, thoracic and lumbar spine), chylothorax, injuries of abdominal organs and tissues, injuries in the neck region, injuries to the eyes, including orbital hemorrhage, traumatic cataract, injury of the oculomotor nerve and retinal puncture, hemorrhage to the cheeks and the hypoglottis, peripheral motor-nerve injuries and subsequent motor dysfunction, local allergic reactions to metal needles, stroke, and cerebral hemorrhage after acupuncture. A causal link between acupuncture and the adverse events cardiac arrest, pyknolepsy, shock, fever, cough, thirst, aphonia, leg numbness, and sexual dysfunction remains uncertain. The same review concluded that acupuncture can be considered inherently safe when practiced by properly trained practitioners, but the review also stated there is a need to find effective strategies to minimize the health risks. Between 1999 and 2010, the Korean-language literature contained reports of 1104 adverse events. Between the 1980s and 2002, the Japanese-language literature contained reports of 150 adverse events. Children and pregnancy Although acupuncture has been practiced for thousands of years in China, its use in pediatrics in the United States did not become common until the early 2000s. In 2007, the National Health Interview Survey (NHIS) conducted by the National Center For Health Statistics (NCHS) estimated that approximately 150,000 children had received acupuncture treatment for a variety of conditions. In 2008 a study determined that the use of acupuncture-needle treatment on children was "questionable" due to the possibility of adverse side-effects and the pain manifestation differences in children versus adults. The study also includes warnings against practicing acupuncture on infants, as well as on children who are over-fatigued, very weak, or have over-eaten. When used on children, acupuncture is considered safe when administered by well-trained, licensed practitioners using sterile needles; however, a 2011 review found there was limited research to draw definite conclusions about the overall safety of pediatric acupuncture. The same review found 279 adverse events, 25 of them serious. The adverse events were mostly mild in nature (e.g. bruising or bleeding). The prevalence of mild adverse events ranged from 10.1% to 13.5%, an estimated 168 incidences among 1,422 patients. On rare occasions adverse events were serious (e.g. cardiac rupture or hemoptysis); many might have been a result of substandard practice. The incidence of serious adverse events was 5 per one million, which included children and adults. When used during pregnancy, the majority of adverse events caused by acupuncture were mild and transient, with few serious adverse events. The most frequent mild adverse event was needling or unspecified pain, followed by bleeding. Although two deaths (one stillbirth and one neonatal death) were reported, there was a lack of acupuncture-associated maternal mortality. Limiting the evidence as certain, probable or possible in the causality evaluation, the estimated incidence of adverse events following acupuncture in pregnant women was 131 per 10,000. Although acupuncture is not contraindicated in pregnant women, some specific acupuncture points are particularly sensitive to needle insertion; these spots, as well as the abdominal region, should be avoided during pregnancy. Moxibustion and cupping Four adverse events associated with moxibustion were bruising, burns and cellulitis, spinal epidural abscess, and large superficial basal cell carcinoma. Ten adverse events were associated with cupping. The minor ones were keloid scarring, burns, and bullae; the serious ones were acquired hemophilia A, stroke following cupping on the back and neck, factitious panniculitis, reversible cardiac hypertrophy, and iron deficiency anemia. Risk of forgoing conventional medical care As with other alternative medicines, unethical or naïve practitioners may induce patients to exhaust financial resources by pursuing ineffective treatment. Professional ethics codes set by accrediting organizations such as the National Certification Commission for Acupuncture and Oriental Medicine require practitioners to make "timely referrals to other health care professionals as may be appropriate." Stephen Barrett states that there is a "risk that an acupuncturist whose approach to diagnosis is not based on scientific concepts will fail to diagnose a dangerous condition". Conceptual basis Traditional Acupuncture is a substantial part of traditional Chinese medicine (TCM). Early acupuncture beliefs relied on concepts that are common in TCM, such as a life force energy called qi. Qi was believed to flow from the body's primary organs (zang-fu organs) to the "superficial" body tissues of the skin, muscles, tendons, bones, and joints, through channels called meridians. Acupuncture points where needles are inserted are mainly (but not always) found at locations along the meridians. Acupuncture points not found along a meridian are called extraordinary points and those with no designated site are called "A-shi" points. In TCM, disease is generally perceived as a disharmony or imbalance in energies such as yin, yang, qi, xuĕ, zàng-fǔ, meridians, and of the interaction between the body and the environment. Therapy is based on which "pattern of disharmony" can be identified. For example, some diseases are believed to be caused by meridians being invaded with an excess of wind, cold, and damp. In order to determine which pattern is at hand, practitioners examine things like the color and shape of the tongue, the relative strength of pulse-points, the smell of the breath, the quality of breathing, or the sound of the voice. TCM and its concept of disease does not strongly differentiate between the cause and effect of symptoms. Purported scientific basis Many within the scientific community consider attempts to rationalize acupuncture in science to be quackery and pseudoscience. Academics Massimo Pigliucci and Maarten Boudry describe it as a "borderlands science" lying between science and pseudoscience. Rationalizations of traditional medicine It is a generally held belief within the acupuncture community that acupuncture points and meridians structures are special conduits for electrical signals, but no research has established any consistent anatomical structure or function for either acupuncture points or meridians. Human tests to determine whether electrical continuity was significantly different near meridians than other places in the body have been inconclusive. Scientific research has not supported the existence of qi, meridians, or yin and yang. A Nature editorial described TCM as "fraught with pseudoscience", with the majority of its treatments having no logical mechanism of action. Quackwatch states that "TCM theory and practice are not based upon the body of knowledge related to health, disease, and health care that has been widely accepted by the scientific community. TCM practitioners disagree among themselves about how to diagnose patients and which treatments should go with which diagnoses. Even if they could agree, the TCM theories are so nebulous that no amount of scientific study will enable TCM to offer rational care." Academic discussions of acupuncture still make reference to pseudoscientific concepts such as qi and meridians despite the lack of scientific evidence. Release of endorphins or adenosine Some modern practitioners support the use of acupuncture to treat pain, but have abandoned the use of qi, meridians, yin, yang and other mystical energies as an explanatory frameworks. The use of qi as an explanatory framework has been decreasing in China, even as it becomes more prominent during discussions of acupuncture in the US. Many acupuncturists attribute pain relief to the release of endorphins when needles penetrate, but no longer support the idea that acupuncture can affect a disease. Some studies suggest acupuncture causes a series of events within the central nervous system, and that it is possible to inhibit acupuncture's analgesic effects with the opioid antagonist naloxone. Mechanical deformation of the skin by acupuncture needles appears to result in the release of adenosine. The anti-nociceptive effect of acupuncture may be mediated by the adenosine A1 receptor. A 2014 review in Nature Reviews Cancer analyzed mouse studies that suggested acupuncture relieves pain via the local release of adenosine, which then triggered nearby A1 receptors. The review found that in those studies, because acupuncture "caused more tissue damage and inflammation relative to the size of the animal in mice than in humans, such studies unnecessarily muddled a finding that local inflammation can result in the local release of adenosine with analgesic effect." History Origins Acupuncture, along with moxibustion, is one of the oldest practices of traditional Chinese medicine. Most historians believe the practice began in China, though there are some conflicting narratives on when it originated. Academics David Ramey and Paul Buell said the exact date acupuncture was founded depends on the extent to which dating of ancient texts can be trusted and the interpretation of what constitutes acupuncture. Acupressure therapy was prevalent in India. Once Buddhism spread to China, the acupressure therapy was also integrated into common medical practice in China and it came to be known as acupuncture. The major points of Indian acupressure and Chinese acupuncture are similar to each other. According to an article in Rheumatology, the first documentation of an "organized system of diagnosis and treatment" for acupuncture was in Inner Classic of Huang Di (Huangdi Neijing) from about 100 BC. Gold and silver needles found in the tomb of Liu Sheng from around 100 BC are believed to be the earliest archaeological evidence of acupuncture, though it is unclear if that was their purpose. According to Plinio Prioreschi, the earliest known historical record of acupuncture is the Shiji ("Records of the Grand Historian"), written by a historian around 100 BC. It is believed that this text was documenting what was established practice at that time. Alternate theories The 5,000-year-old mummified body of Ötzi the Iceman was found with 15 groups of tattoos, many of which were located at points on the body where acupuncture needles are used for abdominal or lower back problems. Evidence from the body suggests Ötzi had these conditions. This has been cited as evidence that practices similar to acupuncture may have been practised elsewhere in Eurasia during the early Bronze Age; however, The Oxford Handbook of the History of Medicine calls this theory "speculative". It is considered unlikely that acupuncture was practised before 2000 BC. Acupuncture may have been practised during the Neolithic era, near the end of the Stone Age, using sharpened stones called Bian shi. Many Chinese texts from later eras refer to sharp stones called "plen", which means "stone probe", that may have been used for acupuncture purposes. The ancient Chinese medical text, Huangdi Neijing, indicates that sharp stones were believed at-the-time to cure illnesses at or near the body's surface, perhaps because of the short depth a stone could penetrate. However, it is more likely that stones were used for other medical purposes, such as puncturing a growth to drain its pus. The Mawangdui texts, which are believed to be from the 2nd century BC, mention the use of pointed stones to open abscesses, and moxibustion, but not for acupuncture. It is also speculated that these stones may have been used for bloodletting, due to the ancient Chinese belief that illnesses were caused by demons within the body that could be killed or released. It is likely bloodletting was an antecedent to acupuncture. According to historians Lu Gwei-djen and Joseph Needham, there is substantial evidence that acupuncture may have begun around 600 BC. Some hieroglyphs and pictographs from that era suggests acupuncture and moxibustion were practised. However, historians Lu and Needham said it was unlikely a needle could be made out of the materials available in China during this time period. It is possible that bronze was used for early acupuncture needles. Tin, copper, gold and silver are also possibilities, though they are considered less likely, or to have been used in fewer cases. If acupuncture was practised during the Shang dynasty (1766 to 1122 BC), organic materials like thorns, sharpened bones, or bamboo may have been used. Once methods for producing steel were discovered, it would replace all other materials, since it could be used to create a very fine, but sturdy needles. Lu and Needham noted that all the ancient materials that could have been used for acupuncture and which often produce archaeological evidence, such as sharpened bones, bamboo or stones, were also used for other purposes. An article in Rheumatology said that the absence of any mention of acupuncture in documents found in the tomb of Mawangdui from 198 BC suggest that acupuncture was not practised by that time. Belief systems Several different and sometimes conflicting belief systems emerged regarding acupuncture. This may have been the result of competing schools of thought. Some ancient texts referred to using acupuncture to cause bleeding, while others mixed the ideas of blood-letting and spiritual ch'i energy. Over time, the focus shifted from blood to the concept of puncturing specific points on the body, and eventually to balancing Yin and Yang energies as well. According to David Ramey, no single "method or theory" was ever predominantly adopted as the standard. At the time, scientific knowledge of medicine was not yet developed, especially because in China dissection of the deceased was forbidden, preventing the development of basic anatomical knowledge. It is not certain when specific acupuncture points were introduced, but the autobiography of Bian Que from around 400–500 BC references inserting needles at designated areas. Bian Que believed there was a single acupuncture point at the top of one's skull that he called the point "of the hundred meetings." Texts dated to be from 156–186 BC document early beliefs in channels of life force energy called meridians that would later be an element in early acupuncture beliefs. Ramey and Buell said the "practice and theoretical underpinnings" of modern acupuncture were introduced in The Yellow Emperor's Classic (Huangdi Neijing) around 100 BC. It introduced the concept of using acupuncture to manipulate the flow of life energy (qi) in a network of meridian (channels) in the body. The network concept was made up of acu-tracts, such as a line down the arms, where it said acupoints were located. Some of the sites acupuncturists use needles at today still have the same names as those given to them by the Yellow Emperor's Classic. Numerous additional documents were published over the centuries introducing new acupoints. By the 4th century AD, most of the acupuncture sites in use today had been named and identified. Early development in China Establishment and growth In the first half of the 1st century AD, acupuncturists began promoting the belief that acupuncture's effectiveness was influenced by the time of day or night, the lunar cycle, and the season. The 'science of the yin-yang cycles' ( ) was a set of beliefs that curing diseases relied on the alignment of both heavenly (tian) and earthly (di) forces that were attuned to cycles like that of the sun and moon. There were several different belief systems that relied on a number of celestial and earthly bodies or elements that rotated and only became aligned at certain times. According to Needham and Lu, these "arbitrary predictions" were depicted by acupuncturists in complex charts and through a set of special terminology. Acupuncture needles during this period were much thicker than most modern ones and often resulted in infection. Infection is caused by a lack of sterilization, but at that time it was believed to be caused by use of the wrong needle, or needling in the wrong place, or at the wrong time. Later, many needles were heated in boiling water, or in a flame. Sometimes needles were used while they were still hot, creating a cauterizing effect at the injection site. Nine needles were recommended in the Great Compendium of Acupuncture and Moxibustion from 1601, which may have been because of an ancient Chinese belief that nine was a magic number. Other belief systems were based on the idea that the human body operated on a rhythm and acupuncture had to be applied at the right point in the rhythm to be effective. In some cases a lack of balance between Yin and Yang were believed to be the cause of disease. In the 1st century AD, many of the first books about acupuncture were published and recognized acupuncturist experts began to emerge. The Zhen Jiu Jia Yi Jing, which was published in the mid-3rd century, became the oldest acupuncture book that is still in existence in the modern era. Other books like the Yu Gui Zhen Jing, written by the Director of Medical Services for China, were also influential during this period, but were not preserved. In the mid 7th century, Sun Simiao published acupuncture-related diagrams and charts that established standardized methods for finding acupuncture sites on people of different sizes and categorized acupuncture sites in a set of modules. Acupuncture became more established in China as improvements in paper led to the publication of more acupuncture books. The Imperial Medical Service and the Imperial Medical College, which both supported acupuncture, became more established and created medical colleges in every province. The public was also exposed to stories about royal figures being cured of their diseases by prominent acupuncturists. By time the Great Compendium of Acupuncture and Moxibustion was published during the Ming dynasty (1368–1644 AD), most of the acupuncture practices used in the modern era had been established. Decline By the end of the Song dynasty (1279 AD), acupuncture had lost much of its status in China. It became rarer in the following centuries, and was associated with less prestigious professions like alchemy, shamanism, midwifery and moxibustion. Additionally, by the 18th century, scientific rationality was becoming more popular than traditional superstitious beliefs. By 1757 a book documenting the history of Chinese medicine called acupuncture a "lost art". Its decline was attributed in part to the popularity of prescriptions and medications, as well as its association with the lower classes. In 1822, the Chinese Emperor signed a decree excluding the practice of acupuncture from the Imperial Medical Institute. He said it was unfit for practice by gentlemen-scholars. In China acupuncture was increasingly associated with lower-class, illiterate practitioners. It was restored for a time, but banned again in 1929 in favor of science-based Western medicine. Although acupuncture declined in China during this time period, it was also growing in popularity in other countries. International expansion Korea is believed to be the first country in Asia that acupuncture spread to outside of China. Within Korea there is a legend that acupuncture was developed by emperor Dangun, though it is more likely to have been brought into Korea from a Chinese colonial prefecture in 514 AD. Acupuncture use was commonplace in Korea by the 6th century. It spread to Vietnam in the 8th and 9th centuries. As Vietnam began trading with Japan and China around the 9th century, it was influenced by their acupuncture practices as well. China and Korea sent "medical missionaries" that spread traditional Chinese medicine to Japan, starting around 219 AD. In 553, several Korean and Chinese citizens were appointed to re-organize medical education in Japan and they incorporated acupuncture as part of that system. Japan later sent students back to China and established acupuncture as one of five divisions of the Chinese State Medical Administration System. Acupuncture began to spread to Europe in the second half of the 17th century. Around this time the surgeon-general of the Dutch East India Company met Japanese and Chinese acupuncture practitioners and later encouraged Europeans to further investigate it. He published the first in-depth description of acupuncture for the European audience and created the term "acupuncture" in his 1683 work De Acupunctura. France was an early adopter among the West due to the influence of Jesuit missionaries, who brought the practice to French clinics in the 16th century. The French doctor Louis Berlioz (the father of the composer Hector Berlioz) is usually credited with being the first to experiment with the procedure in Europe in 1810, before publishing his findings in 1816. By the 19th century, acupuncture had become commonplace in many areas of the world. Americans and Britons began showing interest in acupuncture in the early 19th century, although interest waned by mid-century. Western practitioners abandoned acupuncture's traditional beliefs in spiritual energy, pulse diagnosis, and the cycles of the moon, sun or the body's rhythm. Diagrams of the flow of spiritual energy, for example, conflicted with the West's own anatomical diagrams. It adopted a new set of ideas for acupuncture based on tapping needles into nerves. In Europe it was speculated that acupuncture may allow or prevent the flow of electricity in the body, as electrical pulses were found to make a frog's leg twitch after death. The West eventually created a belief system based on Travell trigger points that were believed to inhibit pain. They were in the same locations as China's spiritually identified acupuncture points, but under a different nomenclature. The first elaborate Western treatise on acupuncture was published in 1683 by Willem ten Rhijne. Modern era In China, the popularity of acupuncture rebounded in 1949 when Mao Zedong took power and sought to unite China behind traditional cultural values. It was also during this time that many Eastern medical practices were consolidated under the name traditional Chinese medicine (TCM). New practices were adopted in the 20th century, such as using a cluster of needles, electrified needles, or leaving needles inserted for up to a week. A lot of emphasis developed on using acupuncture on the ear. Acupuncture research organizations such as the International Society of Acupuncture were founded in the 1940s and 1950s and acupuncture services became available in modern hospitals. China, where acupuncture was believed to have originated, was increasingly influenced by Western medicine. Meanwhile, acupuncture grew in popularity in the US. The US Congress created the Office of Alternative Medicine in 1992 and the National Institutes of Health (NIH) declared support for acupuncture for some conditions in November 1997. In 1999, the National Center for Complementary and Alternative Medicine was created within the NIH. Acupuncture became the most popular alternative medicine in the US. Politicians from the Chinese Communist Party said acupuncture was superstitious and conflicted with the party's commitment to science. Communist Party Chairman Mao Zedong later reversed this position, arguing that the practice was based on scientific principles. In 1971, New York Times reporter James Reston published an article on his acupuncture experiences in China, which led to more investigation of and support for acupuncture. The US President Richard Nixon visited China in 1972. During one part of the visit, the delegation was shown a patient undergoing major surgery while fully awake, ostensibly receiving acupuncture rather than anesthesia. Later it was found that the patients selected for the surgery had both a high pain tolerance and received heavy indoctrination before the operation; these demonstration cases were also frequently receiving morphine surreptitiously through an intravenous drip that observers were told contained only fluids and nutrients. One patient receiving open heart surgery while awake was ultimately found to have received a combination of three powerful sedatives as well as large injections of a local anesthetic into the wound. After the National Institute of Health expressed support for acupuncture for a limited number of conditions, adoption in the US grew further. In 1972 the first legal acupuncture center in the US was established in Washington DC and in 1973 the American Internal Revenue Service allowed acupuncture to be deducted as a medical expense. In 2006, a BBC documentary Alternative Medicine filmed a patient undergoing open heart surgery allegedly under acupuncture-induced anesthesia. It was later revealed that the patient had been given a cocktail of anesthetics. In 2010, UNESCO inscribed "acupuncture and moxibustion of traditional Chinese medicine" on the UNESCO Intangible Cultural Heritage List following China's nomination. Adoption Acupuncture is most heavily practiced in China and is popular in the US, Australia, and Europe. In Switzerland, acupuncture has become the most frequently used alternative medicine since 2004. In the United Kingdom, a total of 4 million acupuncture treatments were administered in 2009. Acupuncture is used in most pain clinics and hospices in the UK. An estimated 1 in 10 adults in Australia used acupuncture in 2004. In Japan, it is estimated that 25 percent of the population will try acupuncture at some point, though in most cases it is not covered by public health insurance. Users of acupuncture in Japan are more likely to be elderly and to have a limited education. Approximately half of users surveyed indicated a likelihood to seek such remedies in the future, while 37% did not. Less than one percent of the US population reported having used acupuncture in the early 1990s. By the early 2010s, more than 14 million Americans reported having used acupuncture as part of their health care. In the US, acupuncture is increasingly () used at academic medical centers, and is usually offered through CAM centers or anesthesia and pain management services. Examples include those at Harvard University, Stanford University, Johns Hopkins University, and UCLA. CDC clinical practice guidelines from 2022 list acupuncture among the types of complementary and alternative medicines physicians should consider in preference to opioid prescription for certain kinds of pain. The use of acupuncture in Germany increased by 20% in 2007, after the German acupuncture trials supported its efficacy for certain uses. In 2011, there were more than one million users, and insurance companies have estimated that two-thirds of German users are women. As a result of the trials, German public health insurers began to cover acupuncture for chronic low back pain and osteoarthritis of the knee, but not tension headache or migraine. This decision was based in part on socio-political reasons. Some insurers in Germany chose to stop reimbursement of acupuncture because of the trials. For other conditions, insurers in Germany were not convinced that acupuncture had adequate benefits over usual care or sham treatments. Highlighting the results of the placebo group, researchers refused to accept a placebo therapy as efficient. Regulation There are various government and trade association regulatory bodies for acupuncture in the United Kingdom, the United States, Saudi Arabia, Australia, New Zealand, Japan, Canada, and in European countries and elsewhere. The World Health Organization recommends that before being licensed or certified, an acupuncturist receive 200 hours of specialized training if they are a physician and 2,500 hours for non-physicians; many governments have adopted similar standards. In Hong Kong, the practice of acupuncture is regulated by the Chinese Medicine Council that was formed in 1999 by the Legislative Council. It includes a licensing exam and registration, as well as degree courses approved by the board. Canada has acupuncture licensing programs in the provinces of British Columbia, Ontario, Alberta and Quebec; standards set by the Chinese Medicine and Acupuncture Association of Canada are used in provinces without government regulation. Regulation in the US began in the 1970s in California, which was eventually followed by every state but Wyoming and Idaho. Licensing requirements vary greatly from state to state. The needles used in acupuncture are regulated in the US by the Food and Drug Administration. In some states acupuncture is regulated by a board of medical examiners, while in others by the board of licensing, health or education. In Japan, acupuncturists are licensed by the Minister of Health, Labour and Welfare after passing an examination and graduating from a technical school or university. In Australia, the Chinese Medicine Board of Australia regulates acupuncture, among other Chinese medical traditions, and restricts the use of titles like 'acupuncturist' to registered practitioners only. The practice of Acupuncture in New Zealand in 1990 acupuncture was included into the Governmental Accident Compensation Corporation (ACC) Act. This inclusion granted qualified and professionally registered acupuncturists to provide subsidised care and treatment to citizens, residents, and temporary visitors for work or sports related injuries that occurred within the country of New Zealand. The two bodies for the regulation of acupuncture and attainment of ACC treatment provider status in New Zealand are Acupuncture NZ, and The New Zealand Acupuncture Standards Authority. At least 28 countries in Europe have professional associations for acupuncturists. In France, the Académie Nationale de Médecine (National Academy of Medicine) has regulated acupuncture since 1955. See also Notes References Bibliography Further reading External links Alternative medicine Chinese inventions Energy therapies Pain management Pseudoscience Traditional Chinese medicine

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https://en.wikipedia.org/wiki/Adder%20%28disambiguation%29

Adder (disambiguation)

Vipera berus, the common European adder, is a snake found in Europe and northern Asia. Adder may also refer to: AA-12 Adder, a Russian air-to-air missile Adder (electronics), an electronic circuit designed to do addition Adder Technology, a manufacturing company Armstrong Siddeley Adder, a late 1940s British turbojet engine Blackadder, a series of BBC sitcoms Golden Axe: The Revenge of Death Adder, a video game HMS Adder, any of seven ships of the Royal Navy Any of several groups of venomous snakes USS Adder, a US submarine See also Addition, a mathematical operation

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https://en.wikipedia.org/wiki/Akkadian%20Empire

Akkadian Empire

The Akkadian Empire () was the first ancient empire of Mesopotamia, succeeding the long-lived civilization of Sumer. Centered on the city of Akkad () and its surrounding region, the empire would unite Akkadian and Sumerian speakers under one rule and exercised significant influence across Mesopotamia, the Levant, and Anatolia, sending military expeditions as far south as Dilmun and Magan (modern Saudi Arabia, Bahrain, and Oman) in the Arabian Peninsula. The Akkadian Empire reached its political peak between the 24th and 22nd centuries BC, following the conquests by its founder Sargon of Akkad. Under Sargon and his successors, the Akkadian language was briefly imposed on neighboring conquered states such as Elam and Gutium. Akkad is sometimes regarded as the first empire in history, though the meaning of this term is not precise, and there are earlier Sumerian claimants. Sources Contemporary sources Epigraphic sources from the Sargonic (Akkadian Empire) period are in relatively short supply, partly because the capital Akkad, like the capitals of the later Mitanni and Sealand, has not yet been located, though there has been much speculation. Some cuneiform tablets have been excavated at cities under Akkadian Empire control like Eshnunna and Tell Agrab. Other tablets, lamentably, have become available on the antiquities market and are held in museums and private collections such as those from the Akkadian governor in Adab. Internal evidence allows their dating to the Sargonic period and sometimes to the original location. Archives are especially important to historians and only a few have become available. The Me-sag Archive, which commenced publication in 1958, is considered one of the most significant collections. The tablets, about 500 in number with about half published, are held primarily at the Babylonian Collection of the Yale University and Baghdad Museum with a few others scattered about. The tablets date to the period of late in the reign of Naram-Sin to early in the reign of Shar-kali-shari. They are believed to be from a town between Umma and Lagash and Me-sag to be the governor of Umma. An archive of 47 tablets was found at the excavation of Tell el-Suleimah in the Hamrin Basin. Various royal inscriptions by the Akkadian rulers have also been found. Most of the original examples are short, or very fragmentary like the Victory Stele of Naram-Sin and the Sargonic victory stele from Telloh. A few longer ones are known because of later copies made, often from the much later Old Babylonian period. While these are assumed to be mostly accurate, it is difficult to know if they had been edited to reflect current political conditions. One of the longer surviving examples is the Bassetki Statue, the copper base of a Narim-Sin statue: A number of fragments of royal statues of Manishtushu all bearing portions of a "standard inscription". Aside from a few minor short inscriptions this is the only known contemporary source for this ruler. An excerpt: Before the Akkadian Empire, calendar years were marked by Regnal Numbers. During Sargonic times, a system of year-names was used. This practice continued until the end of the Old Babylonian period, for example, "Year in which the divine Hammu[rabi] the king Esznunna destroyed by a flood.” Afterwards, Regnal Numbers were used by all succeeding kingdoms. During the Akkadian Empire 3 of the presumed 40 Sargon year-names are known, 1 (presumed 9) of Rimush, 20 (presumed 56) of Naram-Sin, and 18 (presumed 18) of Shar-kali-shari. Recently, a single year-name had been found "In the year that Dūr-Maništusu was established.” There are also, perhaps, a dozen more known, which cannot be firmly linked to a ruler. Especially with the paucity of other inscriptions, year-names are extremely important in determining the history of the Akkadian Empire. As an example, from one year-name, we know that the empire was in conflict with the Gutians long before its end. It attests the name of a Gutian ruler and marks the construction of two temples in Babylon as recognition of Akkadian victory. The final contemporary source are seals and their sealing dates. These are especially important here, as markers, with the shortage of other Akkadian Empire epigraphics and very useful to historians. As an example, two seals and one sealing were found in the Royal Cemetery at Ur which contained the name of Sargons's daughter En-hedu-ana. This provided confirmation of her existence. The seals read "En-hedu-ana, daughter of Sargon: Ilum-pal[il] (is) her coiffeur" and "Adda, estate supervisor/majordomo of En-hedu-ana". At Tell Mozan (ancient Urkesh) brought to light a clay sealing of Tar'am-Agade (Akkad loves <her>), a previously unknown daughter of Naram-Sin, who was possibly married to an unidentified local endan (ruler). Later copies and literary compositions So great was the Akkadian Empire, especially Sargon and Narim-Sin, that its history was passed down for millenia. This ranged on one end to purported copies of still existing Sargonic period inscriptions to literary tales made up from the whole cloth at the other. A few examples: Great Rebellion Against Naram-Sin – At one point in his reign much of the Empire, especially in the old mainly Sumerian city-states, rose up against Naram-Sin. The revolt was crushed but the echoes of the event were passed down in history. Some of the tales, like "Naram-Sin and the Enemy Hordes" (Old Babylonian – purported to be a copy of an inscription at the temple of Nergal in Cutha) and "Gula-AN and the Seventeen Kings against Naram-Sin" were literary compositions which further developed and changed the themes. The earliest examplar, from the Old Babylonian period, is found in several incomplete tablets and fragments, which differ somewhat, purporting to be copies of an inscription on a statue of Naram-Sin standing in the Ekur temple of Enlil at Nippur. Because it aligns with known contemporary inscriptions and year name it is considered authentic, which the usual Mesopotamian slant that something going wrong means you displeased the gods. Cursing of Agade – A purely literary composition which was handed down for millennia in Mesopotamia. Composed in the Ur III period, a century or at most two after the events, it is essentially agitprop. After a long period of Akkadian dominance the Sumerians from the south ar back in ascendancy. The Ur rule is sometimes called the Neo-Sumerian Empire. This composition lays all the troubles before the rise of Ur at the feet of the Akkadian Empire (because Naram-Sin leveled the Ekur temple of Enlil while rebuilding it causing the eight chief deities of Mesopotamia to withdraw their support and protection from Akkad). While basically fiction, it is still useful to historians. There were a number of these, passed down as part of scribel tradition including The Birth Legend of Sargon (Neo-Assyrian), Weidner Chronicle, and the Geographical Treatise on Sargon of Akkad's Empire. Archaeology Identifying architectural remains is hindered by the fact that there are sometimes no clear distinctions between features thought to stem from the preceding Early Dynastic period, and those thought to be Akkadian. Likewise, material that is thought to be Akkadian continues to be in use into the Ur III period. There is a similar issue with cuneiform tablets. In the early Akkadian Empire tablets and the signs on them are much like those from earlier periods, before developing into the much different Classical Sargonic style. With the capital, Akkad, still unlocated, archaeological remains of the empire are still to be found, mainly at the cities they established regional governors. An example would be Adab where Naram-Sin established direct imperial control after Adab joined the "great revolt". After destroying the city of Mari the Akkadian Empire rebuilt it as an administrative center with an imperial governor. The city of Nuzi was established by the Akkadians and a number of economic and administrative texts were found there. Similarly, there are Marad, Nippur, Tutub and Ebla. Excavation at the modern site of Tell Brak has suggested that the Akkadians rebuilt a city ("Brak" or "Nagar") on this site, for use as an administrative center. The city included two large buildings including a complex with temple, offices, courtyard, and large ovens. Dating and periodization The Akkadian period is generally dated to 2334–2154 BC (according to the middle chronology). The short-chronology dates of 2270–2083 BC are now considered less likely. It was preceded by the Early Dynastic Period of Mesopotamia (ED) and succeeded by the Ur III Period, although both transitions are blurry. For example, it is likely that the rise of Sargon of Akkad coincided with the late ED Period and that the final Akkadian kings ruled simultaneously with the Gutian kings alongside rulers at the city-states of both Uruk and Lagash. The Akkadian Period is contemporary with EB IV (in Israel), EB IVA and EJ IV (in Syria), and EB IIIB (in Turkey). Timeline of rulers The relative order of Akkadian kings is clear, while noting that the Ur III version of the Sumerian King List inverts the order of Rimush and Manishtushu. The absolute dates of their reigns are approximate (as with all dates prior to the Late Bronze Age collapse c. 1200 BC). History and development of the empire Pre-Sargonic Akkad The Akkadian Empire takes its name from the region and the city of Akkad, both of which were localized in the general confluence area of the Tigris and Euphrates Rivers. Although the city of Akkad has not yet been identified on the ground, it is known from various textual sources. Among these is at least one text predating the reign of Sargon. Together with the fact that the name Akkad is of non-Akkadian origin, this suggests that the city of Akkad may have already been occupied in pre-Sargonic times. Sargon of Akkad The Bible refers to Akkad in Genesis 10:10–12, which states: "The beginning of his Nimrod's kingdom was Babel, and Erech, and Accad, and Calneh, in the land of Shinar. Out of that land he went forth into Assyria, and built Nineveh, and Rehoboth-Ir, and Calah, and Resen between Nineveh and Calah (the same is the great city)." Nimrod's historical identity is unknown or debated, but Nimrod has been identified as Sargon of Akkad by some, and others have compared him with the legendary Gilgamesh, king of Uruk (Erech). Sargon of Akkad defeated and captured Lugal-zage-si in the Battle of Uruk and conquered his empire. The earliest records in the Akkadian language date to the time of Sargon. Sargon was claimed to be the son of La'ibum or Itti-Bel, a humble gardener, and possibly a hierodule, or priestess to Ishtar or Inanna. One legend related to Sargon in Neo-Assyrian times says that Later claims made on behalf of Sargon were that his mother was an "entu" priestess (high priestess). The claims might have been made to ensure a pedigree of nobility, since only a highly placed family could achieve such a position. Originally a cupbearer (Rabshakeh) to a king of Kish with a Semitic name, Ur-Zababa, Sargon thus became a gardener, responsible for the task of clearing out irrigation canals. The royal cupbearer at this time was in fact a prominent political position, close to the king and with various high level responsibilities not suggested by the title of the position itself. This gave him access to a disciplined corps of workers, who also may have served as his first soldiers. Displacing Ur-Zababa, Sargon was crowned king, and he entered upon a career of foreign conquest. Four times he invaded Syria and Canaan, and he spent three years thoroughly subduing the countries of "the west" to unite them with Mesopotamia "into a single empire". However, Sargon took this process further, conquering many of the surrounding regions to create an empire that reached westward as far as the Mediterranean Sea and perhaps Cyprus (Kaptara); northward as far as the mountains (a later Hittite text asserts he fought the Hattian king Nurdaggal of Burushanda, well into Anatolia); eastward over Elam; and as far south as Magan (Oman) — a region over which he reigned for purportedly 56 years, though only four "year-names" survive. He consolidated his dominion over his territories by replacing the earlier opposing rulers with noble citizens of Akkad, his native city where loyalty would thus be ensured. Trade extended from the silver mines of Anatolia to the lapis lazuli mines in modern Afghanistan, the cedars of Lebanon and the copper of Magan. This consolidation of the city-states of Sumer and Akkad reflected the growing economic and political power of Mesopotamia. The empire's breadbasket was the rain-fed agricultural system and a chain of fortresses was built to control the imperial wheat production. Images of Sargon were erected on the shores of the Mediterranean, in token of his victories, and cities and palaces were built at home with the spoils of the conquered lands. Elam and the northern part of Mesopotamia were also subjugated, and rebellions in Sumer were put down. Contract tablets have been found dated in the years of the campaigns against Canaan and against Sarlak, king of Gutium. He also boasted of having subjugated the "four-quarters" — the lands surrounding Akkad to the north, the south (Sumer), the east (Elam), and the west (Martu). Some of the earliest historiographic texts (ABC 19, 20) suggest he rebuilt the city of Babylon (Bab-ilu) in its new location near Akkad. Sargon, throughout his long life, showed special deference to the Sumerian deities, particularly Inanna (Ishtar), his patroness, and Zababa, the warrior god of Kish. He called himself "The anointed priest of Anu" and "the great ensi of Enlil" and his daughter, Enheduanna, was installed as priestess to Nanna at the temple in Ur. Troubles multiplied toward the end of his reign. A later Babylonian text states: It refers to his campaign in "Elam", where he defeated a coalition army led by the King of Awan and forced the vanquished to become his vassals. Also shortly after, another revolt took place: Rimush and Manishtushu Sargon had crushed opposition even at old age. These difficulties broke out again in the reign of his sons, where revolts broke out during the nine-year reign of Rimush (2278–2270 BC), who fought hard to retain the empire, and was successful until he was assassinated by some of his own courtiers. According to his inscriptions, he faced widespread revolts, and had to reconquer the cities of Ur, Umma, Adab, Lagash, Der, and Kazallu from rebellious ensis: Rimush introduced mass slaughter and large scale destruction of the Sumerian city-states, and maintained meticulous records of his destructions. Most of the major Sumerian cities were destroyed, and Sumerian human losses were enormous: Rimush's elder brother, Manishtushu (2269–2255 BC) succeeded him. The latter seems to have fought a sea battle against 32 kings who had gathered against him and took control over their pre-Arab country, consisting of modern-day United Arab Emirates and Oman. Despite the success, like his brother he seems to have been assassinated in a palace conspiracy. Naram-Sin Manishtushu's son and successor, Naram-Sin (2254–2218 BC), due to vast military conquests, assumed the imperial title "King Naram-Sin, king of the four-quarters" (Lugal Naram-Sîn, Šar kibrat 'arbaim), the four-quarters as a reference to the entire world. He was also for the first time in Sumerian culture, addressed as "the god (Sumerian = DINGIR, Akkadian = ilu) of Agade" (Akkad), in opposition to the previous religious belief that kings were only representatives of the people towards the gods. He also faced revolts at the start of his reign, but quickly crushed them. Naram-Sin also recorded the Akkadian conquest of Ebla as well as Armanum and its king. To better police Syria, he built a royal residence at Tell Brak, a crossroads at the heart of the Khabur River basin of the Jezirah. Naram-Sin campaigned against Magan which also revolted; Naram-Sin "marched against Magan and personally caught Mandannu, its king", where he instated garrisons to protect the main roads. The chief threat seemed to be coming from the northern Zagros Mountains, the Lulubis and the Gutians. A campaign against the Lullubi led to the carving of the "Victory Stele of Naram-Suen", now in the Louvre. Hittite sources claim Naram-Sin of Akkad even ventured into Anatolia, battling the Hittite and Hurrian kings Pamba of Hatti, Zipani of Kanesh, and 15 others. The economy was highly planned. Grain was cleaned, and rations of grain and oil were distributed in standardized vessels made by the city's potters. Taxes were paid in produce and labour on public walls, including city walls, temples, irrigation canals and waterways, producing huge agricultural surpluses. This newfound Akkadian wealth may have been based upon benign climatic conditions, huge agricultural surpluses and the confiscation of the wealth of other peoples. In later Assyrian and Babylonian texts, the name Akkad, together with Sumer, appears as part of the royal title, as in the Sumerian LUGAL KI-EN-GI KI-URI or Akkadian Šar māt Šumeri u Akkadi, translating to "king of Sumer and Akkad". This title was assumed by the king who seized control of Nippur, the intellectual and religious center of southern Mesopotamia. During the Akkadian period, the Akkadian language became the lingua franca of the Middle East, and was officially used for administration, although the Sumerian language remained as a spoken and literary language. The spread of Akkadian stretched from Syria to Elam, and even the Elamite language was temporarily written in Mesopotamian cuneiform. Akkadian texts later found their way to far-off places, from Egypt (in the Amarna Period) and Anatolia, to Persia (Behistun). Submission of Sumerian kings The submission of some Sumerian rulers to the Akkadian Empire, is recorded in the seal inscriptions of Sumerian rulers such as Lugal-ushumgal, governor (ensi) of Lagash ("Shirpula"), circa 2230–2210 BC. Several inscriptions of Lugal-ushumgal are known, particularly seal impressions, which refer to him as governor of Lagash and at the time a vassal (, arad, "servant" or "slave") of Naram-Sin, as well as his successor Shar-kali-sharri. One of these seals proclaims: It can be considered that Lugal-ushumgal was a collaborator of the Akkadian Empire, as was Meskigal, ruler of Adab. Later however, Lugal-ushumgal was succeeded by Puzer-Mama who, as Akkadian power waned, achieved independence from Shar-Kali-Sharri, assuming the title of "King of Lagash" and starting the illustrious Second Dynasty of Lagash. Collapse The empire of Akkad likely fell in the 22nd century BC, within 180 years of its founding, ushering in a "Dark Age" with no prominent imperial authority until the Third Dynasty of Ur. The region's political structure may have reverted to the status quo ante of local governance by city-states. By the end of Sharkalisharri's reign, the empire had begun to unravel. After several years of chaos (and four kings), Shu-turul and Dudu appear to have restored some centralized authority for several decades; however, they were unable to prevent the empire from eventually collapsing outright, eventually ceding power to Gutians, based in Adab, who had been conquered by Akkad during the reign of Sharkalisharri. Little is known about the Gutian period, or how long it endured. Cuneiform sources suggest that the Gutians' administration showed little concern for maintaining agriculture, written records, or public safety; they reputedly released all farm animals to roam about Mesopotamia freely and soon brought about famine and rocketing grain prices. The Sumerian king Ur-Nammu (2112–2095 BC) cleared the Gutians from Mesopotamia during his reign. The Sumerian King List, describing the Akkadian Empire after the death of Shar-kali-shari, states: However, there are no known year-names or other archaeological evidence verifying any of these later kings of Akkad or Uruk, apart from several artefact referencing king Dudu of Akkad and Shu-turul. The named kings of Uruk may have been contemporaries of the last kings of Akkad, but in any event could not have been very prominent. The period between BC and 2004 BC is known as the Ur III period. Documents again began to be written in Sumerian, although Sumerian was becoming a purely literary or liturgical language, much as Latin later would be in Medieval Europe. One explanation for the end of the Akkadian empire is simply that the Akkadian dynasty could not maintain its political supremacy over other independently powerful city-states. Natural causes: drought, seasonal weather patterns One theory, which remains controversial, associates regional decline at the end of the Akkadian period (and of the First Intermediary Period following the Old Kingdom in Ancient Egypt) with rapidly increasing aridity, and failing rainfall in the region of the Ancient Near East, caused by a global centennial-scale drought, sometimes called the 4.2 kiloyear event. Harvey Weiss has shown that Peter B. de Menocal has shown "there was an influence of the North Atlantic Oscillation on the streamflow of the Tigris and Euphrates at this time, which led to the collapse of the Akkadian Empire". More recent analysis of simulations from the HadCM3 climate model indicate that there was a shift to a more arid climate on a timescale that is consistent with the collapse of the empire. Excavation at Tell Leilan suggests that this site was abandoned soon after the city's massive walls were constructed, its temple rebuilt and its grain production reorganized. The debris, dust, and sand that followed show no trace of human activity. Soil samples show fine wind-blown sand, no trace of earthworm activity, reduced rainfall and indications of a drier and windier climate. Evidence shows that skeleton-thin sheep and cattle died of drought, and up to 28,000 people abandoned the site, presumably seeking wetter areas elsewhere. Tell Brak shrank in size by 75%. Trade collapsed. Nomadic herders such as the Amorites moved herds closer to reliable water suppliers, bringing them into conflict with Akkadian populations. This climate-induced collapse seems to have affected the whole of the Middle East, and to have coincided with the collapse of the Egyptian Old Kingdom. This collapse of rain-fed agriculture in the Upper Country meant the loss to southern Mesopotamia of the agrarian subsidies which had kept the Akkadian Empire solvent. Water levels within the Tigris and Euphrates fell 1.5 meters beneath the level of 2600 BC, and although they stabilized for a time during the following Ur III period, rivalries between pastoralists and farmers increased. Attempts were undertaken to prevent the former from herding their flocks in agricultural lands, such as the building of a wall known as the "Repeller of the Amorites" between the Tigris and Euphrates under the Ur III ruler Shu-Sin. Such attempts led to increased political instability; meanwhile, severe depression occurred to re-establish demographic equilibrium with the less favorable climatic conditions. Richard Zettler has critiqued the drought theory, observing that the chronology of the Akkadian empire is very uncertain and that available evidence is not sufficient to show its economic dependence on the northern areas excavated by Weiss and others. He also criticizes Weiss for taking Akkadian writings literally to describe certain catastrophic events. According to Joan Oates, at Tell Brak, the soil "signal" associated with the drought lies below the level of Naram-Sin's palace. However, evidence may suggest a tightening of Akkadian control following the Brak 'event', for example, the construction of the heavily fortified 'palace' itself and the apparent introduction of greater numbers of Akkadian as opposed to local officials, perhaps a reflection of unrest in the countryside of the type that often follows some natural catastrophe. Furthermore, Brak remained occupied and functional after the fall of the Akkadians. In 2019, a study by Hokkaido University on fossil corals in Oman provides an evidence that prolonged winter shamal seasons led to the salinization of the irrigated fields; hence, a dramatic decrease in crop production triggered a widespread famine and eventually the collapse of the ancient Akkadian Empire. Government The Akkadian government formed a "classical standard" with which all future Mesopotamian states compared themselves. Traditionally, the ensi was the highest functionary of the Sumerian city-states. In later traditions, one became an ensi by marrying the goddess Inanna, legitimising the rulership through divine consent. Initially, the monarchical lugal (lu = man, gal =Great) was subordinate to the priestly ensi, and was appointed at times of troubles, but by later dynastic times, it was the lugal who had emerged as the preeminent role, having his own "é" (= house) or "palace", independent from the temple establishment. By the time of Mesalim, whichever dynasty controlled the city of Kish was recognised as šar kiššati (= king of Kish), and was considered preeminent in Sumer, possibly because this was where the two rivers approached, and whoever controlled Kish ultimately controlled the irrigation systems of the other cities downstream. As Sargon extended his conquest from the "Lower Sea" (Persian Gulf), to the "Upper Sea" (Mediterranean), it was felt that he ruled "the totality of the lands under heaven", or "from sunrise to sunset", as contemporary texts put it. Under Sargon, the ensis generally retained their positions, but were seen more as provincial governors. The title šar kiššati became recognised as meaning "lord of the universe". Sargon is even recorded as having organised naval expeditions to Dilmun (Bahrain) and Magan, amongst the first organised military naval expeditions in history. Whether he also did in the case of the Mediterranean with the kingdom of Kaptara (possibly Cyprus), as claimed in later documents, is more questionable. With Naram-Sin, Sargon's grandson, this went further than with Sargon, with the king not only being called "Lord of the Four-Quarters (of the Earth)", but also elevated to the ranks of the dingir (= gods), with his own temple establishment. Previously a ruler could, like Gilgamesh, become divine after death but the Akkadian kings, from Naram-Sin onward, were considered gods on earth in their lifetimes. Their portraits showed them of larger size than mere mortals and at some distance from their retainers. One strategy adopted by both Sargon and Naram-Sin, to maintain control of the country, was to install their daughters, Enheduanna and Emmenanna respectively, as high priestess to Sin, the Akkadian version of the Sumerian moon deity, Nanna, at Ur, in the extreme south of Sumer; to install sons as provincial ensi governors in strategic locations; and to marry their daughters to rulers of peripheral parts of the Empire (Urkesh and Marhashe). A well documented case of the latter is that of Naram-Sin's daughter Tar'am-Agade at Urkesh. Records at the Brak administrative complex suggest that the Akkadians appointed locals as tax collectors. Economy The population of Akkad, like nearly all pre-modern states, was entirely dependent upon the agricultural systems of the region, which seem to have had two principal centres: the irrigated farmlands of southern Iraq that traditionally had a yield of 30 grains returned for each grain sown and the rain-fed agriculture of northern Iraq, known as the "Upper Country." Southern Iraq during Akkadian period seems to have been approaching its modern rainfall level of less than per year, with the result that agriculture was totally dependent upon irrigation. Before the Akkadian period, the progressive salinisation of the soils, produced by poorly drained irrigation, had been reducing yields of wheat in the southern part of the country, leading to the conversion to more salt-tolerant barley growing. Urban populations there had peaked already by 2,600 BC, and demographic pressures were high, contributing to the rise of militarism apparent immediately before the Akkadian period (as seen in the Stele of the Vultures of Eannatum). Warfare between city states had led to a population decline, from which Akkad provided a temporary respite. It was this high degree of agricultural productivity in the south that enabled the growth of the highest population densities in the world at this time, giving Akkad its military advantage. The water table in this region was very high and replenished regularly—by winter storms in the headwaters of the Tigris and Euphrates from October to March and from snow-melt from March to July. Flood levels, that had been stable from about 3,000 to 2,600 BC, had started falling, and by the Akkadian period were a half-meter to a meter lower than recorded previously. Even so, the flat country and weather uncertainties made flooding much more unpredictable than in the case of the Nile; serious deluges seem to have been a regular occurrence, requiring constant maintenance of irrigation ditches and drainage systems. Farmers were recruited into regiments for this work from August to October—a period of food shortage—under the control of city temple authorities, thus acting as a form of unemployment relief. Gwendolyn Leick has suggested that this was Sargon's original employment for the king of Kish, giving him experience in effectively organising large groups of men; a tablet reads, "Sargon, the king, to whom Enlil permitted no rival—5,400 warriors ate bread daily before him". Harvest was in the late spring and during the dry summer months. Nomadic Amorites from the northwest would pasture their flocks of sheep and goats to graze on the crop residue and be watered from the river and irrigation canals. For this privilege, they would have to pay a tax in wool, meat, milk, and cheese to the temples, who would distribute these products to the bureaucracy and priesthood. In good years, all would go well, but in bad years, wild winter pastures would be in short supply, nomads would seek to pasture their flocks in the grain fields, and conflicts with farmers would result. It would appear that the subsidizing of southern populations by the import of wheat from the north of the Empire temporarily overcame this problem, and it seems to have allowed economic recovery and a growing population within this region. Foreign trade As a result, Sumer and Akkad had a surplus of agricultural products but was short of almost everything else, particularly metal ores, timber and building stone, all of which had to be imported. The spread of the Akkadian state as far as the "silver mountain" (possibly the Taurus Mountains), the "cedars" of Lebanon, and the copper deposits of Magan, was largely motivated by the goal of securing control over these imports. One tablet, an Old Babylonian Period copy of an original inscription, reads: International trade developed during the Akkadian period. Indus-Mesopotamia relations also seem to have expanded: Sargon of Akkad (circa 2300 or 2250 BC), was the first Mesopotamian ruler to make an explicit reference to the region of Meluhha, which is generally understood as being the Baluchistan or the Indus area. Culture Akkadian art In art, there was a great emphasis on the kings of the dynasty, alongside much that continued earlier Sumerian art. Little architecture remains. In large works and small ones such as seals, the degree of realism was considerably increased, but the seals show a "grim world of cruel conflict, of danger and uncertainty, a world in which man is subjected without appeal to the incomprehensible acts of distant and fearful divinities who he must serve but cannot love. This sombre mood ... remained characteristic of Mesopotamian art..." Akkadian sculpture is remarkable for its fineness and realism, which shows a clear advancement compared to the previous period of Sumerian art. Seals The Akkadians used visual arts as a vehicle of ideology. They developed a new style for cylinder seals by reusing traditional animal decorations but organizing them around inscriptions, which often became central parts of the layout. The figures also became more sculptural and naturalistic. New elements were also included, especially in relation to the rich Akkadian mythology. Language During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism. The influence of Sumerian on Akkadian (and vice versa) is evident in all areas, from lexical borrowing on a massive scale, to syntactic, morphological, and phonological convergence. This has prompted scholars to refer to Sumerian and Akkadian in the third millennium as a sprachbund. Akkadian gradually replaced Sumerian as a spoken language somewhere around 2000 BC (the exact dating being a matter of debate), but Sumerian continued to be used as a sacred, ceremonial, literary, and scientific language in Mesopotamia until the 1st century AD. Poet–priestess Enheduanna Sumerian literature continued in rich development during the Akkadian period. Enheduanna, the "wife (Sumerian dam = high priestess) of Nanna [the Sumerian moon god] and daughter of Sargon" of the temple of Sin at Ur, who lived –2250 BC, is the first poet in history whose name is known. Her known works include hymns to the goddess Inanna, the Exaltation of Inanna and In-nin sa-gur-ra. A third work, the Temple Hymns, a collection of specific hymns, addresses the sacred temples and their occupants, the deity to whom they were consecrated. The works of this poet are significant, because although they start out using the third person, they shift to the first person voice of the poet herself, and they mark a significant development in the use of cuneiform. As poet, princess, and priestess, she was a person who, according to William W. Hallo, "set standards in all three of her roles for many succeeding centuries" In the Exultation of Inanna, The kings of Akkad were legendary among later Mesopotamian civilizations, with Sargon understood as the prototype of a strong and wise leader, and his grandson Naram-Sin considered the wicked and impious leader (Unheilsherrscher in the analysis of Hans Gustav Güterbock) who brought ruin upon his kingdom. Technology A tablet from the periods reads, "(From the earliest days) no-one had made a statue of lead, (but) Rimush king of Kish, had a statue of himself made of lead. It stood before Enlil; and it recited his (Rimush's) virtues to the idu of the gods". The copper Bassetki Statue, cast with the lost wax method, testifies to the high level of skill that craftsmen achieved during the Akkadian period. See also List of cities of the ancient Near East List of Mesopotamian deities History of Mesopotamia List of Mesopotamian dynasties Notes Bibliography Liverani, Mario, ed. (1993). Akkad: The First World Empire: Structure, Ideology Traditions. Padova: Sargon srl. Oates, Joan (2004). "Archaeology in Mesopotamia: Digging Deeper at Tell Brak". 2004 Albert Reckitt Archaeological Lecture. In Proceedings of the British Academy: 2004 Lectures; Oxford University Press, 2005. . Further reading Gough, M.A, Historical Perception in the Sargonic Literary Tradition. The Implication of Copied Texts, Rosetta 1, pp 1–9, 2006 Paszke, Marcin Z, "From Sargon To Narām-Sîn: some remarks on Akkadian military activity in the II nd half of the III rd millennium bc. The example of eastern campaigns", Acta Archaeologica Lodziensia 68, pp. 75–83, 2022 E. A. Speiser, "Some Factors in the Collapse of Akkad", Journal of the American Oriental Society, vol. 72, no. 3, pp. 97–101, (Jul. - Sep. 1952) External links Iraq's Ancient Past – Penn Museum Year Names of Narim-Sin – CDLI Year Named of Shar-kali-Sharri – CDLI Site on Enheduanna at Virginia Tech University (archived 12 December 2009) States and territories established in the 3rd millennium BC States and territories disestablished in the 3rd millennium BC Assyrian geography Ancient Mesopotamia Ancient Upper Mesopotamia Ancient Levant 24th-century BC establishments 3rd-millennium BC disestablishments Former monarchies of Asia Nimrod Former empires

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https://en.wikipedia.org/wiki/Ajax

Ajax

Ajax may refer to: Greek mythology and tragedy Ajax the Great, a Greek mythological hero, son of King Telamon and Periboea Ajax the Lesser, a Greek mythological hero, son of Oileus, the king of Locris Ajax (play), by the ancient Greek tragedian Sophocles, about Ajax the Great Arts and entertainment Fictional characters Ajax Duckman, in the animated television series Duckman Marvel Comics: Ajax the Greater, another name for Ajak, one of the Eternals from Marvel Comics Ajax the Lesser, another name for Arex, one of the Eternals from Marvel Comics Ajax, a member of the Pantheon appearing in Marvel Comics Ajax (Francis Fanny), a fictional supervillain first appearing in Deadpool #14 Martian Manhunter, a DC Comics superhero called Ajax in Brazil and Portugal Ajax, a Call of Duty: Black Ops 4 operative Ajax, from the video game Genshin Impact Music A-Jax (band), a South Korean boy band Ajax (band), an electronic music band from New York City Ajax (opera), by the French composer Toussaint Bertin de la Doué DJ Ajax (1971-2013; born Adrian Thomas), an Australian electro mashup DJ Lisa Ajax (born 1998), Swedish singer "Ajax" (song), a song by Tante Leen, 1969 Ajax Records, a former North American record company Other arts and entertainment Ajax (painting), a painting by John Steuart Curry Ajax (Disney), a fictional company (the Disney equivalent of Looney Tunes' Acme Corporation) A-Jax (video game), a 1987 Konami arcade game Computing Ajax (floppy disk controller), a floppy disk controller fitted to the Atari STE Ajax (programming), Asynchronous JavaScript and XML, a method used in web application development, and a software framework for it Places Canada Ajax (federal electoral district), in the Durham Region of Ontario Ajax (provincial electoral district), in Ontario Ajax, Ontario, a town in the Greater Toronto Area United States Ajax, Louisiana, an unincorporated community Ajax, Missouri, a ghost town Ajax Peak, a summit near Telluride, Colorado Ajax, South Dakota, an unincorporated community Ajax, Utah, a ghost town Ajax, Virginia, an unincorporated community Ajax, West Virginia, an unincorporated community Aspen Mountain (Colorado), also known as Ajax Mountain Elsewhere Mount Ajax, part of the Admiralty Mountains, Victoria Land, Antarctic 1404 Ajax, an asteroid People Ajax (missionary), Arian missionary who converted the Suevi to Christianity ( 466) Ajax, pen name of Sidney William Jackson (1873–1946), Australian naturalist and ornithologist Ajax, nickname of Heinrich Bleichrodt (1909–1977), German World War II U-boat commander Sport Association football (soccer) AFC Ajax, a football club in Amsterdam, Netherlands Ajax Cape Town F.C., a South African football club Ajax Futebol Clube, a Brazilian football club Ajax de Ouenzé, a Congolese football club FC Ajax Lasnamäe, an Estonian football club Ajax Orlando Prospects, American soccer team from Orlando, Florida, a.k.a. Ajax America Ajax America Women, American women's soccer team from California Aias Salamina F.C., a football club in Salamina, Greece Ajax Sportsman Combinatie, a cricket and football club in Leiden, Netherlands Rabat Ajax F.C., a Maltese football club Unión Ájax, a football club in Trujillo, Honduras Voetbal Vereniging Ajax, a Surinamese football club Other sports Ajax Kenitra, a Moroccan futsal (indoor football) club Ajax København, a Danish handball team Ajax (horse) (born 1901), a French Champion racehorse Ajax II (born 1934), an Australian Champion racehorse Military , several ships of the Royal Navy , several ships of the US Navy General Dynamics Ajax, a family of armoured fighting vehicles for the British Army Operation Ajax, the 1953 Iranian coup d'état Transport Ajax (1906 automobile), a Swiss automobile Ajax (1913 automobile), a French automobile by the American Briscoe brothers Ajax (1914 automobile), an American automobile by Ajax Motors Co. of Seattle, Washington Ajax (1921 automobile), an American prototype that was not produced Ajax (Nash Motors), an automobile brand of Nash Motors, 1925–1926 Ajax (locomotive), several train locomotives Ajax (motorcycle), manufactured in England between 1923 and 1924 Ajax (crane barge), a floating crane used to install the Panama Canal locks Ajax (ship), various ships Ajax GO Station, a train and bus station in Ajax, Ontario, Canada Ajax Motors Co., an American carmaker, manufacturer of the Ajax (1914 automobile) Other uses Ajax (cleaning product), a brand of household cleaning products AFC Ajax N.V., a sports company associated with AFC Ajax Kanichee Mine, Temagami, Ontario, also known as Ajax Mine Ajax High School, a public high school in Ajax, Ontario, Canada AJAX furnace, a type of open hearth furnace See also Nike Ajax, the world's first operational surface-to-air missile Ayaks, a hypersonic waverider aircraft program started in the Soviet Union

1577

https://en.wikipedia.org/wiki/Alcaeus%20of%20Mytilene

Alcaeus of Mytilene

Alcaeus of Mytilene (; , Alkaios ho Mutilēnaios; – BC) was a lyric poet from the Greek island of Lesbos who is credited with inventing the Alcaic stanza. He was included in the canonical list of nine lyric poets by the scholars of Hellenistic Alexandria. He was a contemporary of Sappho, with whom he may have exchanged poems. He was born into the aristocratic governing class of Mytilene, the main city of Lesbos, where he was involved in political disputes and feuds. Biography The broad outlines of the poet's life are well known. He was born into the aristocratic, warrior class that dominated Mytilene, the strongest city-state on the island of Lesbos and, by the end of the seventh century BC, the most influential of all the North Aegean Greek cities, with a strong navy and colonies securing its trade-routes in the Hellespont. The city had long been ruled by kings born to the Penthilid clan but, during the poet's life, the Penthilids were a spent force and rival aristocrats and their factions contended with each other for supreme power. Alcaeus and his older brothers were passionately involved in the struggle but experienced little success. Their political adventures can be understood in terms of three tyrants who came and went in succession: Melanchrus – he was overthrown sometime between 612 BC and 609 BC by a faction that, in addition to the brothers of Alcaeus, included Pittacus (later renowned as one of the Seven Sages of Greece); Alcaeus at that time was too young to be actively involved; Myrsilus – it is not known when he came to power but some verses by Alcaeus (frag. 129) indicate that the poet, his brothers and Pittacus made plans to overthrow him and that Pittacus subsequently betrayed them; Alcaeus and his brothers fled into exile where the poet later wrote a drinking song in celebration of the news of the tyrant's death (frag. 332); Pittacus – the dominant political figure of his time, he was voted supreme power by the political assembly of Mytilene and appears to have governed well (590-580 BC), even allowing Alcaeus and his faction to return home in peace. Sometime before 600 BC, Mytilene fought Athens for control of Sigeion and Alcaeus was old enough to participate in the fighting. According to the historian Herodotus, the poet threw away his shield to make good his escape from the victorious Athenians then celebrated the occasion in a poem that he later sent to his friend, Melanippus. It is thought that Alcaeus travelled widely during his years in exile, including at least one visit to Egypt. His older brother, Antimenidas, appears to have served as a mercenary in the army of Nebuchadnezzar II and probably took part in the conquest of Askelon. Alcaeus wrote verses in celebration of Antimenides' return, including mention of his valour in slaying the larger opponent (frag. 350), and he proudly describes the military hardware that adorned their family home (frag. 357). Alcaeus was a contemporary and a countryman of Sappho and, since both poets composed for the entertainment of Mytilenean friends, they had many opportunities to associate with each other on a quite regular basis, such as at the Kallisteia, an annual festival celebrating the island's federation under Mytilene, held at the 'Messon' (referred to as temenos in frs. 129 and 130), where Sappho performed publicly with female choirs. Alcaeus' reference to Sappho in terms more typical of a divinity, as holy/pure, honey-smiling Sappho (fr. 384), may owe its inspiration to her performances at the festival. The Lesbian or Aeolic school of poetry "reached in the songs of Sappho and Alcaeus that high point of brilliancy to which it never after-wards approached" and it was assumed by later Greek critics and during the early centuries of the Christian era that the two poets were in fact lovers, a theme which became a favourite subject in art (as in the urn pictured above). Poetry The poetic works of Alcaeus were collected into ten books, with elaborate commentaries, by the Alexandrian scholars Aristophanes of Byzantium and Aristarchus of Samothrace sometime in the 3rd century BC, and yet his verses today exist only in fragmentary form, varying in size from mere phrases, such as wine, window into a man (fr. 333) to entire groups of verses and stanzas, such as those quoted below (fr. 346). Alexandrian scholars numbered him in their canonic nine (one lyric poet per Muse). Among these, Pindar was held by many ancient critics to be pre-eminent, but some gave precedence to Alcaeus instead. The canonic nine are traditionally divided into two groups, with Alcaeus, Sappho and Anacreon, being 'monodists' or 'solo-singers', with the following characteristics: They composed and performed personally for friends and associates on topics of immediate interest to them; They wrote in their native dialects (Alcaeus and Sappho in Aeolic dialect, Anacreon in Ionic); They preferred quite short, metrically simple stanzas or 'strophes' which they re-used in many poems – hence the 'Alcaic' and 'Sapphic' stanzas, named after the two poets who perfected them or possibly invented them. The other six of the canonic nine composed verses for public occasions, performed by choruses and professional singers and typically featuring complex metrical arrangements that were never reproduced in other verses. However, this division into two groups is considered by some modern scholars to be too simplistic and often it is practically impossible to know whether a lyric composition was sung or recited, or whether or not it was accompanied by musical instruments and dance. Even the private reflections of Alcaeus, ostensibly sung at dinner parties, still retain a public function. Critics often seek to understand Alcaeus in comparison with Sappho: The Roman poet, Horace, also compared the two, describing Alcaeus as "more full-throatedly singing" – see Horace's tribute below. Alcaeus himself seems to underscore the difference between his own 'down-to-earth' style and Sappho's more 'celestial' qualities when he describes her almost as a goddess (as cited above), and yet it has been argued that both poets were concerned with a balance between the divine and the profane, each emphasising different elements in that balance. Dionysius of Halicarnassus exhorts us to "Observe in Alcaeus the sublimity, brevity and sweetness coupled with stern power, his splendid figures, and his clearness which was unimpaired by the dialect; and above all mark his manner of expressing his sentiments on public affairs", while Quintilian, after commending Alcaeus for his excellence "in that part of his works where he inveighs against tyrants and contributes to good morals; in his language he is concise, exalted, careful and often like an orator"; goes on to add: "but he descended into wantonness and amours, though better fitted for higher things". Poetic genres The works of Alcaeus are conventionally grouped according to five genres. Political songs: Alcaeus often composed on a political theme, covering the power struggles on Lesbos with the passion and vigour of a partisan, cursing his opponents, rejoicing in their deaths, delivering blood-curdling homilies on the consequences of political inaction and exhorting his comrades to heroic defiance, as in one of his 'ship of state' allegories. Commenting on Alcaeus as a political poet, the scholar Dionysius of Halicarnassus once observed that "if you removed the meter you would find political rhetoric". Drinking songs: According to the grammarian Athenaeus, Alcaeus made every occasion an excuse for drinking and he has provided posterity several quotes in proof of it. Alcaeus exhorts his friends to drink in celebration of a tyrant's death, to drink away their sorrows, to drink because life is short and along the lines in vino veritas, to drink through winter storms and to drink through the heat of summer. The latter poem in fact paraphrases verses from Hesiod, re-casting them in Asclepiad meter and Aeolian dialect. Hymns: Alcaeus sang about the gods in the spirit of the Homeric hymns, to entertain his companions rather than to glorify the gods and in the same meters that he used for his 'secular' lyrics. There are for example fragments in 'Sapphic' meter praising the Dioscuri, Hermes and the river Hebrus (a river significant in Lesbian mythology since it was down its waters that the head of Orpheus was believed to have floated singing, eventually crossing the sea to Lesbos and ending up in a temple of Apollo, as a symbol of Lesbian supremacy in song). According to Porphyrion, the hymn to Hermes was imitated by Horace in one of his own 'sapphic' odes (C.1.10: Mercuri, facunde nepos Atlantis). Love songs: Almost all Alcaeus' amorous verses, mentioned with disapproval by Quintilian above, have vanished without trace. There is a brief reference to his love poetry in a passage by Cicero. Horace, who often wrote in imitation of Alcaeus, sketches in verse one of the Lesbian poet's favourite subjects – Lycus of the black hair and eyes (C.1.32.11–12: nigris oculis nigroque/crine decorum). It is possible that Alcaeus wrote amorously about Sappho, as indicated in an earlier quote. Miscellaneous: Alcaeus wrote on such a wide variety of subjects and themes that contradictions in his character emerge. The grammarian Athenaeus quoted some verses about perfumed ointments to prove just how unwarlike Alcaeus could be and he quoted his description of the armour adorning the walls of his house as proof that he could be unusually warlike for a lyric poet. Other examples of his readiness for both warlike and unwarlike subjects are lyrics celebrating his brother's heroic exploits as a Babylonian mercenary and lyrics sung in a rare meter (Sapphic Ionic in minore) in the voice of a distressed girl, "Wretched me, who share in all ills!" – possibly imitated by Horace in an ode in the same meter (C.3.12: Miserarum est neque amori dare ludum neque dulci). He also wrote Sapphic stanzas on Homeric themes but in un-Homeric style, comparing Helen of Troy unfavourably with Thetis, the mother of Achilles. A drinking poem (fr. 346) The following verses demonstrate some key characteristics of the Alcaic style (square brackets indicate uncertainties in the ancient text): The Greek meter here is relatively simple, comprising the Greater Asclepiad, adroitly used to convey, for example, the rhythm of jostling cups (). The language of the poem is typically direct and concise and comprises short sentences — the first line is in fact a model of condensed meaning, comprising an exhortation ("Let's drink!"), a rhetorical question ("Why are we waiting for the lamps?") and a justifying statement ("Only an inch of daylight left"). The meaning is clear and uncomplicated, the subject is drawn from personal experience, and there is an absence of poetic ornament, such as simile or metaphor. Like many of his poems (e.g., frs. 38, 326, 338, 347, 350), it begins with a verb (in this case "Let's drink!") and it includes a proverbial expression ("Only an inch of daylight left") though it is possible that he coined it himself. A hymn (fr. 34) Alcaeus rarely used metaphor or simile and yet he had a fondness for the allegory of the storm-tossed ship of state. The following fragment of a hymn to Castor and Polydeuces (the Dioscuri) is possibly another example of this though some scholars interpret it instead as a prayer for a safe voyage. The poem was written in Sapphic stanzas, a verse form popularly associated with his compatriot, Sappho, but in which he too excelled, here paraphrased in English to suggest the same rhythms. There were probably another three stanzas in the original poem but only nine letters of them remain. The 'far-away light' () is a reference to St. Elmo's Fire, an electrical discharge supposed by ancient Greek mariners to be an epiphany of the Dioscuri, but the meaning of the line was obscured by gaps in the papyrus until reconstructed by a modern scholar; such reconstructions are typical of the extant poetry (see Scholars, fragments and sources below). This poem does not begin with a verb but with an adverb (Δευτέ) but still communicates a sense of action. He probably performed his verses at drinking parties for friends and political allies – men for whom loyalty was essential, particularly in such troubled times. Tributes from other poets Horace The Roman poet Horace modelled his own lyrical compositions on those of Alcaeus, rendering the Lesbian poet's verse-forms, including 'Alcaic' and 'Sapphic' stanzas, into concise Latin – an achievement he celebrates in his third book of odes. In his second book, in an ode composed in Alcaic stanzas on the subject of an almost fatal accident he had on his farm, he imagines meeting Alcaeus and Sappho in Hades: Ovid Ovid compared Alcaeus to Sappho in Letters of the Heroines, where Sappho is imagined to speak as follows: Scholars, fragments and sources The story of Alcaeus is partly the story of the scholars who rescued his work from oblivion. His verses have not come down to us through a manuscript tradition – generations of scribes copying an author's collected works, such as delivered intact into the modern age four entire books of Pindar's odes – but haphazardly, in quotes from ancient scholars and commentators whose own works have chanced to survive, and in the tattered remnants of papyri uncovered from an ancient rubbish pile at Oxyrhynchus and other locations in Egypt: sources that modern scholars have studied and correlated exhaustively, adding little by little to the world's store of poetic fragments. Ancient scholars quoted Alcaeus in support of various arguments. Thus for example Heraclitus "The Allegorist" quoted fr. 326 and part of fr. 6, about ships in a storm, in his study on Homer's use of allegory. The hymn to Hermes, fr308(b), was quoted by Hephaestion and both he and Libanius, the rhetorician, quoted the first two lines of fr. 350, celebrating the return from Babylon of Alcaeus' brother. The rest of fr. 350 was paraphrased in prose by the historian/geographer Strabo. Many fragments were supplied in quotes by Athenaeus, principally on the subject of wine-drinking, but fr. 333, "wine, window into a man", was quoted much later by the Byzantine grammarian, John Tzetzes. The first 'modern' publication of Alcaeus' verses appeared in a Greek and Latin edition of fragments collected from the canonic nine lyrical poets by Michael Neander, published at Basle in 1556. This was followed by another edition of the nine poets, collected by Henricus Stephanus and published in Paris in 1560. Fulvius Ursinus compiled a fuller collection of Alcaic fragments, including a commentary, which was published at Antwerp in 1568. The first separate edition of Alcaeus was by Christian David Jani and it was published at Halle in 1780. The next separate edition was by August Matthiae, Leipzig 1827. Some of the fragments quoted by ancient scholars were able to be integrated by scholars in the nineteenth century. Thus for example two separate quotes by Athenaeus were united by Theodor Bergk to form fr. 362. Three separate sources were combined to form fr. 350, as mentioned above, including a prose paraphrase from Strabo that first needed to be restored to its original meter, a synthesis achieved by the united efforts of Otto Hoffmann, Karl Otfried Müller and Franz Heinrich Ludolf Ahrens. The discovery of the Oxyrhynchus papyri towards the end of the nineteenth century dramatically increased the scope of scholarly research. In fact, eight important fragments have now been compiled from papyri – frs. 9, 38A, 42, 45, 34, 129, 130 and most recently S262. These fragments typically feature lacunae or gaps that scholars fill with 'educated guesses', including for example a "brilliant supplement" by Maurice Bowra in fr. 34, a hymn to the Dioscuri that includes a description of St. Elmo's fire in the ship's rigging. Working with only eight letters (; tr. pró...tr...ntes), Bowra conjured up a phrase that develops the meaning and the euphony of the poem (; tr. próton' ontréchontes), describing luminescence "running along the forestays". References Sources Sappho et Alcaeus. Fragmenta. Eva-Maria Voigt (ed.). Polak and van Gennep, Amsterdam, 1971. Greek Lyric Poetry. D.A. Campbell (ed.). Bristol Classical Press, London, 1982. Greek Lyric 1: Sappho and Alcaeus. D. A. Campbell (ed.). Harvard University Press, Cambridge, Mass., 1982. Alcée. Fragments. Gauthier Liberman (ed.). Collection Budé, Paris, 1999. Sappho and the Greek Lyric Poets. Translated by Willis Barnstone. Schoken Books Inc., New York, 1988. External links Poems by Alcaeus – English translations A. M. Miller, Greek Lyric: – Alcaeus, many fragments Alcaeus Bilingual Anthology (in Greek and English, side by side) 620s BC births Year of birth unknown 6th-century BC deaths Year of death unknown Nine Lyric Poets Aeolic Greek poets Ancient Greek political refugees Ancient Mytileneans Poets from ancient Lesbos 6th-century BC Greek people 6th-century BC poets

1623

https://en.wikipedia.org/wiki/Andrew%20Jackson

Andrew Jackson

Andrew Jackson (March 15, 1767 – June 8, 1845) was an American lawyer, planter, general, and statesman who served as the seventh president of the United States from 1829 to 1837. Before being elected to the presidency, he gained fame as a general in the U.S. Army and served in both houses of the U.S. Congress. Although often praised as an advocate for ordinary Americans and for his work in preserving the union of states, Jackson has also been criticized for his racial policies, particularly his treatment of Native Americans. Jackson was born in the colonial Carolinas before the American Revolutionary War. He became a frontier lawyer and married Rachel Donelson Robards. He briefly served in the U.S. House of Representatives and the U.S. Senate, representing Tennessee. After resigning, he served as a justice on the Tennessee Supreme Court from 1798 until 1804. Jackson purchased a property later known as the Hermitage, becoming a wealthy planter who owned hundreds of African American slaves during his lifetime. In 1801, he was appointed colonel of the Tennessee militia and was elected its commander the following year. He led troops during the Creek War of 1813–1814, winning the Battle of Horseshoe Bend. The subsequent Treaty of Fort Jackson required the indigenous Creek population to surrender vast tracts of present-day Alabama and Georgia. In the concurrent war against the British, Jackson's victory at the Battle of New Orleans in 1815 made him a national hero. He later commanded U.S. forces in the First Seminole War, which led to the annexation of Florida from Spain. Jackson briefly served as Florida's first territorial governor before returning to the Senate. He ran for president in 1824, winning a plurality of the popular and electoral vote, but no candidate won an electoral majority. In a contingent election, the House of Representatives elected John Quincy Adams with Henry Clay's support. Jackson's supporters alleged that there was a "corrupt bargain" between Adams and Clay and began creating their own political organization that would eventually become the Democratic Party. Jackson ran again in 1828, defeating Adams in a landslide. In 1830, he signed the Indian Removal Act. This act, which has been described as ethnic cleansing, displaced tens of thousands of Native Americans from their ancestral homelands east of the Mississippi and resulted in thousands of deaths. Under Jackson, the integrity of the federal union was challenged when South Carolina threatened to nullify a high protective tariff set by the federal government. He threatened the use of military force to enforce the tariff, but the crisis was defused when it was amended. In 1832, he vetoed a bill by Congress to reauthorize the Second Bank of the United States, arguing that it was a corrupt institution that benefited the wealthy. After a lengthy struggle, he and his allies dismantled the Bank. In 1835, Jackson became the only president to pay off the national debt. He also survived the first assassination attempt on a sitting president. In one of his final presidential acts, he recognized the Republic of Texas. In his retirement, Jackson stayed active in politics. He supported the presidencies of Martin Van Buren and James K. Polk, as well as the annexation of Texas, which was accomplished shortly before his death. Jackson's legacy remains controversial, and opinions on him are frequently polarized. Supporters characterize him as a defender of democracy and the Constitution, while critics point to his reputation as a demagogue who ignored the law when it suited him. Scholars and historians have consistently ranked Jackson's presidency as significantly above-average, although his reputation among experts has declined since the late 20th century. Early life and education Andrew Jackson was born on March 15, 1767, in the Waxhaws region of the Carolinas. His parents were Scots-Irish colonists Andrew Jackson and Elizabeth Hutchinson, Presbyterians who had emigrated from Ulster, Ireland, in 1765. Jackson's father was born in Carrickfergus, County Antrim, around 1738, and his ancestors had crossed into Northern Ireland from Scotland after the Battle of the Boyne in 1690. Jackson had two older brothers who came with his parents from Ireland, Hugh (born 1763) and Robert (born 1764). Jackson's exact birthplace is unclear. Jackson's father died at the age of 29 in a logging accident while clearing land in February 1767, three weeks before his son Andrew was born. Afterwards, Elizabeth and her three sons moved in with her sister and brother-in-law, Jane and James Crawford. Jackson later stated that he was born on the Crawford plantation, which is in Lancaster County, South Carolina, but second-hand evidence suggests that he might have been born at another uncle's home in North Carolina. When Jackson was young, Elizabeth thought he might become a minister and paid to have him schooled by a local clergyman. He learned to read, write, work with numbers, and was exposed to Greek and Latin, but he was too strong-willed and hot-tempered for the ministry. Revolutionary War Jackson and his older brothers, Hugh and Robert, served on the Patriot side against British forces during the American Revolutionary War. Hugh served under Colonel William Richardson Davie, dying from heat exhaustion after the Battle of Stono Ferry in June 1779. After anti-British sentiment intensified in the Southern Colonies following the Waxhaws Massacre in May 1780, Elizabeth encouraged Andrew and Robert to participate in militia drills. They served as couriers and scouts, and participated with Davie in the Battle of Hanging Rock in August 1780. Andrew and Robert were captured in April 1781 when the British occupied the home of a Crawford relative. A British officer demanded to have his boots polished. Andrew refused, and the major slashed him with a sword, leaving him with scars on his left hand and head. Robert also refused and was struck a blow on the head. The brothers were taken to a prisoner-of-war camp in Camden, South Carolina, where they became malnourished and contracted smallpox. In late spring, the brothers were released to their mother in a prisoner exchange. Robert died two days after arriving home, but Elizabeth was able to nurse Andrew back to health. Once he recovered, Elizabeth volunteered to nurse American prisoners of war housed in British prison ships in the harbor of Charleston, South Carolina. She contracted cholera and died soon afterwards. The war not only made Jackson an orphan at age 14, but led him to despise values he associated with Britain, in particular aristocracy and political privilege. Early career Legal career and marriage After the American Revolutionary War, Jackson worked as a saddler, briefly returned to school, and taught reading and writing to children. In 1784, he left the Waxhaws region for Salisbury, North Carolina, where he studied law under attorney Spruce Macay. He completed his training under John Stokes, and was admitted to the North Carolina bar in September 1787. Shortly thereafter, his friend John McNairy helped him get appointed as a prosecuting attorney in the Western District of North Carolina, which would later become the state of Tennessee. While traveling to assume his new position, Jackson stopped in Jonesborough. While there, he bought his first slave, a woman who was around his age. He also fought his first duel, accusing another lawyer, Waightstill Avery, of impugning his character. The duel ended with both men firing in the air. Jackson began his new career in the frontier town of Nashville in 1788 and quickly moved up in social status. He became a protégé of William Blount, one of the most powerful men in the territory. Jackson was appointed attorney general of the Mero District in 1791 and judge-advocate for the militia the following year. He also got involved in land speculation, eventually forming a partnership with fellow lawyer John Overton. Their partnership mainly dealt with claims made under a "land grab" act of 1783 that opened Cherokee and Chickasaw territory to North Carolina's white residents. While boarding at the home of Rachel Stockly Donelson, the widow of John Donelson, Jackson became acquainted with their daughter, Rachel Donelson Robards. The younger Rachel was in an unhappy marriage with Captain Lewis Robards, and the two were separated by 1789. After the separation, Jackson and Rachel became romantically involved, living together as husband and wife. Robards petitioned for divorce, which was granted on the basis of Rachel's infidelity. The couple legally married in January 1794. In 1796, they acquired their first plantation, Hunter's Hill, on of land near Nashville. Early public career Jackson became a member of the Democratic-Republican Party, the dominant party in Tennessee. He was elected as a delegate to the Tennessee constitutional convention in 1796. When Tennessee achieved statehood that year, he was elected to be its U.S. representative. In Congress, Jackson argued against the Jay Treaty, criticized George Washington for allegedly removing Democratic-Republicans from public office, and joined several other Democratic-Republican congressmen in voting against a resolution of thanks for Washington. He advocated for the right of Tennesseans to militarily oppose Native American interests. The state legislature elected him to be a U.S. senator in 1797, but he resigned after serving only six months. Upon returning to Tennessee, Jackson was elected as a judge of the Tennessee superior court. In 1802, he also became major general, or commander, of the Tennessee militia, a position that was determined by a vote of the militia's officers. The vote was tied between Jackson and John Sevier, a popular Revolutionary War veteran and former governor, but the governor, Archibald Roane, broke the tie in Jackson's favor. Jackson later accused Sevier of fraud and bribery. Sevier responded by impugning Rachel's honor, resulting in a shootout on a public street. Soon afterwards, they met to duel, but parted without having fired at each other. Planting career and slavery Jackson resigned his judgeship in 1804. He had almost gone bankrupt when the credit he used for land speculation collapsed in the wake of an earlier financial panic. He had to sell Hunter's Hill, as well as of land he bought for speculation, and bought a smaller plantation near Nashville that he would call the Hermitage. He focused on recovering from his losses by becoming a successful planter and merchant. The Hermitage would grow to , making it one of the largest cotton-growing plantations in the state. Like most planters in the Southern United States, Jackson used slave labor. In 1804, Jackson had nine African American slaves; by 1820, he had over 100; and by his death in 1845, he had over 150. Over his lifetime, he owned a total of 300 slaves. Jackson subscribed to the paternalistic idea of slavery, which claimed that slave ownership was morally acceptable as long as slaves were treated with humanity and their basic needs were cared for. In practice, slaves were treated as a form of wealth whose productivity needed to be protected. Jackson directed harsh punishment for slaves who disobeyed or ran away. For example, in an 1804 advertisement to recover a runaway slave, he offered "ten dollars extra, for every hundred lashes any person will give him" up to three hundred lashes—a number that would likely have been deadly. Jackson also participated in the local slave trade. Over time, his accumulation of wealth in both slaves and land placed him among the elite families of Tennessee. Duel with Dickinson and adventure with Burr In May 1806, Jackson fought a duel with Charles Dickinson. They had gotten into an argument over a horse race, and Dickinson allegedly uttered a slur against Rachel. During the duel, Dickinson fired first, and the bullet hit Jackson in the chest. The wound was not life-threatening because the bullet had shattered against his breastbone. Jackson returned fire and killed Dickinson. The killing tarnished Jackson's reputation. Later in the year, Jackson became involved in former vice president Aaron Burr's plan to conquer Spanish Florida and drive the Spanish from Texas. Burr, who was touring what was then the Western United States after mortally wounding Alexander Hamilton in a duel, stayed with the Jacksons at the Hermitage in 1805. He eventually persuaded Jackson to join his adventure. In October 1806, Jackson wrote James Winchester that the United States "can conquer not only [Florida], but all Spanish North America". He informed the Tennessee militia that it should be ready to march at a moment's notice "when the government and constituted authority of our country require it", and agreed to provide boats and provisions for the expedition. Jackson sent a letter to President Thomas Jefferson telling him that Tennessee was ready to defend the nation's honor. Jackson also expressed uncertainty about the enterprise. He warned the Governor of Louisiana William Claiborne and Tennessee Senator Daniel Smith that some of the people involved in the adventure might be intending to break away from the United States. In December, Jefferson ordered Burr to be arrested for treason. Jackson, safe from arrest because of his extensive paper trail, organized the militia to capture the conspirators. He testified before a grand jury in 1807, implying that it was Burr's associate James Wilkinson who was guilty of treason, not Burr. Burr was acquitted of the charges. Military career War of 1812 Creek War On June 18, 1812, the United States declared war on the United Kingdom. Though the War of 1812 was primarily caused by maritime issues, the war provided the white settlers on the southern frontier the opportunity to overcome Native American resistance to settlement, undermine British support of the Native American tribes, and pry Florida from the Spanish. Jackson immediately offered to raise volunteers for the war, but he was not called to duty until after the United States military was repeatedly defeated in the American Northwest. After these defeats, in January 1813, Jackson enlisted over 2,000 volunteers, who were ordered to head to New Orleans to defend against a British attack. When his forces arrived at Natchez, they were ordered to halt by General Wilkinson, the commander at New Orleans and the man Jackson accused of treason after the Burr adventure. A little later, Jackson received a letter from the Secretary of War, John Armstrong, stating that his volunteers were not needed, and that they were to hand over any supplies to Wilkinson and disband. Jackson refused to disband his troops; instead, he led them on the difficult march back to Nashville, earning the nickname "Hickory" (later "Old Hickory") for his toughness. After returning to Nashville, Jackson and one of his colonels, John Coffee, got into a street brawl over honor with the brothers Jesse and Thomas Hart Benton. Nobody was killed, but Jackson received a gunshot in the shoulder that nearly killed him. Jackson had not fully recovered from his wounds when Governor Willie Blount called out the militia in September 1813 following the August Fort Mims Massacre. The Red Sticks, a confederate faction that had allied with Tecumseh, a Shawnee chief who was fighting with the British against the United States, killed about 250 militia men and civilians at Fort Mims in retaliation for an ambush by American militia at Burnt Corn Creek. Jackson's objective was to destroy the Red Sticks. He headed south from Fayetteville, Tennessee, in October with 2,500 militia, establishing Fort Strother as his supply base. He sent his cavalry under General Coffee ahead of the main force, destroying Red Stick villages and capturing supplies. Coffee defeated a band of Red Sticks at the Battle of Tallushatchee on November 3, and Jackson defeated another band later that month at the Battle of Talladega. By January 1814, the expiration of enlistments and desertion had reduced Jackson's force by about 1,000 volunteers, but he continued the offensive. The Red Sticks counterattacked at the Battles of Emuckfaw and Enotachopo Creek. Jackson repelled them but was forced to withdraw to Fort Strother. Jackson's army was reinforced by further recruitment and the addition of a regular army unit, the 39th U.S. Infantry Regiment. The combined force of 3,000 men—including Cherokee, Choctaw, and Creek allies—attacked a Red Stick fort at Horseshoe Bend on the Tallapoosa River, which was manned by about 1,000 men. The Red Sticks were overwhelmed and massacred. Almost all their warriors were killed, and nearly 300 women and children were taken prisoner and distributed to Jackson's Native American allies. The victory broke the power of the Red Sticks. Jackson continued his scorched-earth campaign of burning villages, destroying supplies, and starving Red Stick women and children. The campaign ended when William Weatherford, the Red Stick leader, surrendered, although some Red Sticks fled to East Florida. On June 8, Jackson was appointed a brigadier general in the United States Army, and 10 days later was made a brevet major general with command of the Seventh Military District, which included Tennessee, Louisiana, the Mississippi Territory, and the Muscogee Creek Confederacy. With President James Madison's approval, Jackson imposed the Treaty of Fort Jackson. The treaty required all Creek, including those who had remained allies, to surrender of land to the United States. Jackson then turned his attention to the British and Spanish. He moved his forces to Mobile, Alabama, in August, accused the Spanish governor of West Florida, Mateo González Manrique, of arming the Red Sticks, and threatened to attack. The governor responded by inviting the British to land at Pensacola to defend it, which violated Spanish neutrality. The British attempted to capture Mobile, but their invasion fleet was repulsed at Fort Bowyer. Jackson then invaded Florida, defeating the Spanish and British forces at the Battle of Pensacola on November 7. Afterwards, the Spanish surrendered and the British withdrew. Weeks later, Jackson learned that the British were planning an attack on New Orleans, which was the gateway to the Lower Mississippi River and control of the American West. He evacuated Pensacola, strengthened the garrison at Mobile, and led his troops to New Orleans. Battle of New Orleans Jackson arrived in New Orleans on December 1, 1814. There he instituted martial law because he worried about the loyalty of the city's Creole and Spanish inhabitants. He augmented his force by forming an alliance with Jean Lafitte's smugglers and raising units of free African Americans and Creek, paying non-white volunteers the same salary as whites. This gave Jackson a force of about 5,000 men when the British arrived. The British arrived in New Orleans in mid-December. Admiral Alexander Cochrane was the overall commander of the operation; General Edward Pakenham commanded the army of 10,000 soldiers, many of whom had served in the Napoleonic Wars. As the British advanced up the east bank of the Mississippi River, Jackson constructed a fortified position to block them. The climactic battle took place on January 8 when the British launched a frontal assault. Their troops made easy targets for the Americans protected by their parapets, and the attack ended in disaster. The British suffered over 2,000 casualties (including Pakenham) to the Americans' 60. The British decamped from New Orleans at the end of January, but they still remained a threat. Jackson refused to lift martial law and kept the militia under arms. He approved the execution of six militiamen for desertion. Some Creoles registered as French citizens with the French consul and demanded to be discharged from the militia due to their foreign nationality. Jackson then ordered all French citizens to leave the city within three days, and had a member of the Louisiana legislature, Louis Louaillier, arrested when he wrote a newspaper article criticizing Jackson's continuation of martial law. U.S. District Court Judge Dominic A. Hall signed a writ of habeas corpus for Louaillier's release. Jackson had Hall arrested too. A military court ordered Louaillier's release, but Jackson kept him in prison and evicted Hall from the city. Although Jackson lifted martial law when he received official word that the Treaty of Ghent, which ended the war with the British, had been signed, his previous behavior tainted his reputation in New Orleans. Jackson's victory made him a national hero, and on February 27, 1815, he was given the Thanks of Congress and awarded a Congressional Gold Medal. Though the Treaty of Ghent had been signed in December 1814 before the Battle of New Orleans was fought, Jackson's victory assured that the United States control of the region between Mobile and New Orleans would not be effectively contested by European powers. This control allowed the American government to ignore one of the articles in the treaty, which would have returned the Creek lands taken in the Treaty of Fort Jackson. First Seminole War Following the war, Jackson remained in command of troops in the southern half of the United States and was permitted to make his headquarters at the Hermitage. Jackson continued to displace the Native Americans in areas under his command. Despite resistance from Secretary of the Treasury William Crawford, he signed five treaties between 1816 and 1820 in which the Creek, Choctaw, Cherokee and Chickasaw ceded tens of millions of acres of land to the United States. These included the Treaty of Tuscaloosa and the Treaty of Doak's Stand. Jackson soon became embroiled in conflict in the Floridas. The former British post at Prospect Bluff, which became known to Americans as "the Negro fort", remained occupied by more than a thousand former soldiers of the British Royal and Colonial Marines, escaped slaves, and various indigenous peoples. It had become a magnet for escapees and was seen as a threat to the property rights of American enslavers, even a potential source of insurrection by enslaved people. Jackson ordered Colonel Duncan Clinch to capture the fort in July 1816. He destroyed it and killed many of the garrison. Some survivors were enslaved while others fled into the wilderness of Florida. In addition, white settlers were in constant conflict with Native American people collectively known as the Seminoles, who straddled the border between the U.S. and Florida. In December 1817, Secretary of War John C. Calhoun initiated the First Seminole War by ordering Jackson to lead a campaign "with full power to conduct the war as he may think best". Jackson believed the best way to do this was to seize Florida from Spain once and for all. Before departing, Jackson wrote to President James Monroe, "Let it be signified to me through any channel ... that the possession of the Floridas would be desirable to the United States, and in sixty days it will be accomplished." Jackson invaded Florida, captured the Spanish fort of St. Marks, and occupied Pensacola. Seminole and Spanish resistance was effectively ended by May 1818. He also captured two British agents, Robert Ambrister and Alexander Arbuthnot, who had been working with the Seminoles. After a brief trial, Jackson executed both of them, causing a diplomatic incident with the British. Jackson's actions polarized Monroe's cabinet. The occupied territories were returned to Spain. Calhoun wanted him censured for violating the Constitution, since the United States had not declared war on Spain. Secretary of State John Quincy Adams defended him as he thought Jackson's occupation of Pensacola would lead Spain to sell Florida, which Spain did in the Adams–Onís Treaty of 1819. In February 1819, a congressional investigation exonerated Jackson, and his victory was instrumental in convincing the Seminoles to sign the Treaty of Moultrie Creek in 1823, which surrendered much of their land in Florida. Presidential aspirations Election of 1824 The Panic of 1819, the United States' first prolonged financial depression, caused Congress to reduce the military's size and abolish Jackson's generalship. In compensation, Monroe made him the first territorial governor of Florida in 1821. He served as the governor for two months, returning to the Hermitage in ill health. During his convalescence, Jackson, who had been a Freemason since at least 1798, became the Grand Master of the Grand Lodge of Tennessee for 1822–1823. Around this time, he also completed negotiations for Tennessee to purchase Chickasaw lands. This became known as the Jackson Purchase. Jackson, Overton, and another colleague had speculated in some of the land and used their portion to found the town of Memphis. In 1822, Jackson agreed to run in the 1824 presidential election, and he was nominated by the Tennessee legislature in July. At the time, the Federalist Party had collapsed, and there were four major contenders for the Democratic-Republican Party nomination: William Crawford, John Quincy Adams, Henry Clay and John C. Calhoun. Jackson was intended to be a stalking horse candidate to prevent Tennessee's electoral votes from going to Crawford, who was seen as a Washington insider. Unexpectedly, Jackson garnered popular support outside of Tennessee and became a serious candidate. He benefited from the expansion of suffrage among white males that followed the conclusion of the War of 1812. He was a popular war hero whose reputation suggested he had the decisiveness and independence to bring reform to Washington. He also was promoted as an outsider who stood for all the people, blaming banks for the country's depression. During his presidential candidacy, Jackson reluctantly ran for one of Tennessee's U.S. Senate seats. Jackson's political managers William Berkeley Lewis and John Eaton convinced him that he needed to defeat incumbent John Williams, who opposed him. The legislature elected Jackson in October 1823. He was attentive to his senatorial duties. He was appointed chairman of the Committee on Military Affairs, but avoided debate or initiating legislation. He used his time in the Senate to form alliances and make peace with old adversaries. Eaton continued to campaign for Jackson's presidency, updating his biography and writing a series of widely circulated pseudonymous letters that portrayed Jackson as a champion of republican liberty. Democratic-Republican presidential nominees had historically been chosen by informal congressional nominating caucuses. In 1824, most of the Democratic-Republicans in Congress boycotted the caucus, and the power to choose nominees was shifting to state nominating committees and legislatures. Jackson was nominated by a Pennsylvania convention, making him not merely a regional candidate but the leading national contender. When Jackson won the Pennsylvania nomination, Calhoun dropped out of the presidential race. Afterwards, Jackson won the nomination in six other states and had a strong second-place finish in three others. In the presidential election, Jackson won a 42-percent plurality of the popular vote. More importantly, he won a plurality of electoral votes, receiving 99 votes from states in the South, West, and Mid-Atlantic. He was the only candidate to win states outside of his regional base: Adams dominated New England, Crawford won Virginia and Georgia, and Clay took three western states. Because no candidate had a majority of 131 electoral votes, the House of Representatives held a contingent election under the terms of the Twelfth Amendment. The amendment specifies that only the top three electoral vote-winners are eligible to be elected by the House, so Clay was eliminated from contention. Clay, who was also Speaker of the House and presided over the election's resolution, saw a Jackson presidency as a disaster for the country. Clay threw his support behind Adams, who won the contingent election on the first ballot. Adams appointed Clay as his Secretary of State, leading supporters of Jackson to accuse Clay and Adams of having struck a "corrupt bargain". After the Congressional session concluded, Jackson resigned his Senate seat and returned to Tennessee. Election of 1828 and death of Rachel Jackson After the election, Jackson's supporters formed a new party to undermine Adams and ensure he served only one term. Adams's presidency went poorly, and Adams's behavior undermined it. He was perceived as an intellectual elite who ignored the needs of the populace. He was unable to accomplish anything because Congress blocked his proposals. In his First Annual Message to Congress, Adams stated that "we are palsied by the will of our constituents", which was interpreted as his being against representative democracy. Jackson responded by championing the needs of ordinary citizens and declaring that "the voice of the people... must be heard". Jackson was nominated for president by the Tennessee legislature in October 1825, more than three years before the 1828 election. He gained powerful supporters in both the South and North, including Calhoun, who became Jackson's vice presidential running mate, and New York Senator Martin Van Buren. Meanwhile, Adams's support from the Southern states was eroded when he signed a tax on European imports, the Tariff of 1828, which was called the "Tariff of Abominations" by opponents, into law. Jackson's victory in the presidential race was overwhelming. He won 56 percent of the popular vote and 68 percent of the electoral vote. The election ended the one-party system that had formed during the Era of Good Feelings as Jackson's supporters coalesced into the Democratic Party and the various groups who did not support him eventually formed the Whig Party. The political campaign was dominated by the personal abuse that partisans flung at both candidates. Jackson was accused of being the son of an English prostitute and a mulatto, and he was labeled a slave trader who trafficked in human flesh. A series of pamphlets known as the Coffin Handbills accused him of having murdered 18 white men, including the soldiers he had executed for desertion and alleging that he stabbed a man in the back with his cane. They stated that he had intentionally massacred Native American women and children at the Battle of Horseshoe Bend, ate the bodies of Native Americans he killed in battle, and threatened to cut off the ears of congressmen who questioned his behavior during the First Seminole War. Jackson and Rachel were accused of adultery for living together before her divorce was finalized, and Rachel heard about the accusation. She had been under stress throughout the election, and just as Jackson was preparing to head to Washington for his inauguration, she fell ill. She did not live to see her husband become president, dying of a stroke or heart attack a few days later. Jackson believed that the abuse from Adams' supporters had hastened her death, stating at her funeral: "May God Almighty forgive her murderers, as I know she forgave them. I never can." Presidency (1829–1837) Inauguration Jackson arrived in Washington on February 11. His first concern was forming his cabinet. He chose Van Buren as Secretary of State, his friend John Eaton as Secretary of War, Samuel D. Ingham as Secretary of Treasury, John Branch as Secretary of Navy, John M. Berrien as Attorney General, and William T. Barry as Postmaster General. Jackson was inaugurated on March 4, 1829, becoming the first president-elect to take the oath of office on the East Portico of the U.S. Capitol. Embittered by his defeat, Adams refused to attend. In his inaugural address, Jackson promised to protect the sovereignty of the states, respect the limits of the presidency, reform the government by removing disloyal or incompetent appointees, and observe a fair policy toward Native Americans. Jackson invited the public to the White House, which was promptly overrun by well-wishers who caused minor damage to its furnishings. The spectacle earned him the nickname "King Mob". Reforms and rotation in office Jackson's administration believed that Adams's had been corrupt and one of Jackson's first acts as president was to initiate investigations into all executive departments. The investigations revealed that $280,000 () was stolen from the Treasury, and the reduction in costs to the Department of the Navy saved it $1 million (). One of the people caught in his investigation was the Treasury Auditor Tobias Watkins, a personal friend of Adams' who was found guilty of embezzlement. Jackson asked Congress to tighten laws on embezzlement and tax evasion, and he pushed for an improved government accounting system. Jackson implemented a principle he called "rotation in office" by enforcing the Tenure of Office Act, an 1820 law that limited appointed office tenure and authorized the president to remove and appoint political party associates. The previous custom had been for the president to leave the existing appointees in office, replacing them through attrition. During his first year in office, Jackson removed about 10% of all federal employees and replaced them with loyal Democrats. He argued that rotation in office was a democratic reform that reduced bureaucracy and corruption by making officeholders responsible to the popular will, but it functioned as political patronage, which came to be known as the spoils system. Petticoat affair Jackson spent much of his time during his first two and a half years in office dealing with what came to be known as the "Petticoat Affair" or "Eaton Affair". The affair focused on Secretary of War Eaton's wife, Margaret. She had a reputation for being promiscuous, and like Rachel Jackson, she was accused of adultery. She and Eaton had been close before her first husband John Timberlake died, and they married nine months after his death. With the exception of Barry's wife Catherine, the cabinet members' wives followed the lead of Vice-president Calhoun's wife Floride and refused to socialize with the Eatons. Though Jackson defended Margaret, her presence split the cabinet, which had been so ineffective that he rarely called it into session, and the ongoing disagreement led to its dissolution. In the spring of 1831, Jackson demanded the resignations of all the cabinet members except Barry, who would resign in 1835 when a Congressional investigation revealed his mismanagement of the Post Office. Jackson tried to compensate Van Buren by appointing him the Minister to Great Britain, but Calhoun blocked the nomination with a tie-breaking vote against it. Van Buren—along with Amos Kendall, who helped organize what would become the Democratic Party, and Francis Preston Blair, the editor of The Globe newspaper that served as Jackson's house organ,—would become regular participants in Jackson's Kitchen Cabinet, an unofficial, varying group of advisors that Jackson turned to for decision making even after he had formed a new official cabinet. Indian Removal Act Jackson's presidency marked the beginning of a national policy of Native American removal. Before Jackson took office, the relationship between the southern states and the Native American tribes who lived within their boundaries was strained. The states felt that they had full jurisdiction over their territories; the native tribes saw themselves as autonomous nations that had a right to the land they lived on. Significant portions of the five major tribes in the area then known as the Southwest—the Cherokee, Choctaw, Chickasaw, Creek, and Seminoles— began to adopt white culture, including education, agricultural techniques, a road system, and rudimentary manufacturing. In the case of the tensions between the state of Georgia and the Cherokee, Adams had tried to address the issue encouraging Cherokee emigration west of the Mississippi through financial incentives, but most refused. In the first days of Jackson's presidency, some of the southern states had passed legislation extending state jurisdiction to Native American lands. Jackson supported the states' right to do so. His position was later made clear in the 1832 Supreme Court test case of this legislation, Worcester v. Georgia. Georgia had arrested a group of missionaries for entering Cherokee territory without a permit; the Cherokee declared these arrests illegal. The court under Chief Justice John Marshall decided in favor of the Cherokee: imposition of Georgia law on the Cherokee was unconstitutional. Horace Greeley alleges that when Jackson heard the ruling, he said, "Well, John Marshall has made his decision, but now let him enforce it." Although the quote may be apocryphal, Jackson made it clear he would not use the federal government to enforce the ruling. Jackson used the power of the federal government to enforce the separation of the Native American tribes and whites. In May 1830, Jackson passed the Indian Removal Act through Congress. It gave the president the right to negotiate treaties to buy tribal lands in the eastern part of the United States in exchange for lands set aside for Native Americans west of the Mississippi, as well as broad discretion on how to use the federal funds allocated to the negotiations. The law was supposed to be a voluntary relocation program, but it was not implemented as one. Jackson's administration often achieved agreement to relocate through bribes, fraud and intimidation, and the leaders who signed the treaties often did not represent the entire tribe. The relocations could be a source of misery too: the Choctaw relocation was rife with corruption, theft, and mismanagement that brought great suffering to that people. In 1830, Jackson personally negotiated with the Chickasaw, who quickly agreed to move. In the same year, Choctaw leaders signed the Treaty of Dancing Rabbit Creek; the majority did not want the treaty but complied with its terms. In 1832, Seminole leaders signed the Treaty of Payne's Landing, which stipulated that the Seminoles would move west and become part of the Muscogee Creek Confederacy if they found the new land suitable. Most Seminoles refused to move, leading to the Second Seminole War in 1835 that lasted six years. Members of the Muscogee Creek Confederacy ceded their land to the state of Alabama in the Treaty of Cusseta of 1832. Their private ownership of the land was to be protected, but the federal government did not enforce this. The government did encourage voluntary removal until the Creek War of 1836, after which almost all Creek were removed to Oklahoma territory. In 1836, Cherokee leaders ceded their land to the government by the Treaty of New Echota. Their removal, known as the Trail of Tears, was enforced by Jackson's successor, Van Buren. Jackson also applied the removal policy in the Northwest. He was not successful in removing the Iroquois Confederacy in New York, but when some members of the Meskwaki (Fox) and the Sauk triggered the Black Hawk War by trying to cross back to the east side of the Mississippi, the peace treaties ratified after their defeat reduced their lands further. During his administration, he made about 70 treaties with American Indian tribes. He had removed almost all the Native Americans east of the Mississippi and south of Lake Michigan, about 70,000 people, from the United States; though it was done at the cost of thousands of Native American lives lost because of the unsanitary conditions and epidemics arising from their dislocation, as well as their resistance to expulsion. Jackson's implementation of the Indian Removal Act contributed to his popularity with his constituency. He added over 170,000 square miles of land to the public domain, which primarily benefited the United States' agricultural interests. The act also benefited small farmers, as Jackson allowed them to purchase moderate plots at low prices and offered squatters on land formerly belonging to Native Americans the option to purchase it before it was offered for sale to others. Nullification crisis Jackson had to confront another challenge that had been building up since the beginning of his first term. The Tariff of 1828, which had been passed in the last year of Adams' administration, set a protective tariff at a very high rate to prevent the manufacturing industries in the Northern states from having to compete with lower-priced imports from Britain. The tariff reduced the income of southern cotton planters: it propped up consumer prices, but not the price of cotton which had severely declined in the previous decade. Immediately after the tariff's passage, the South Carolina Exposition and Protest was sent to the U.S. Senate. This document, which had been anonymously written by John C. Calhoun, asserted that the constitution was a compact of individual states and when the federal government went beyond its delegated duties, such as enacting a protective tariff, a state had a right to declare this action unconstitutional and make the act null and void with the borders of that state. Jackson suspected Calhoun of writing the Exposition and Protest, and opposed his interpretation. Jackson argued that Congress as a whole had full authority to enact tariffs and that a dissenting state was denying the will of the majority. He also needed the tariff, which generated 90% of the federal revenue, to achieve another of his presidential goals, eliminating the national debt. The issue developed into a personal rivalry between the two men. For example, during a celebration of Thomas Jefferson's birthday on April 13, 1830, the attendees gave after-dinner toasts. Jackson toasted: "Our federal Union: It must be preserved!" – a clear challenge to nullification. Calhoun whose toast immediately followed, rebutted: "The Union: Next to our Liberty, the most dear!" As a compromise, Jackson supported the Tariff of 1832, which reduced the duties from the Tariff of 1828 by almost half. The bill was signed on July 9, but failed to satisfy extremists on either side. On November 24, South Carolina had passed the Ordinance of Nullification, declaring both tariffs null and void and threatening to secede from the United States if the federal government tried to use force to collect the duties. In response, Jackson sent warships to Charleston harbor, and threatened to hang any man who worked to support nullification or secession. On December 10, Jackson issued a proclamation against the "nullifiers", stating that he considered "the power to annul a law of the United States, assumed by one State, incompatible with the existence of the Union, contradicted expressly by the letter of the Constitution, unauthorized by its spirit, inconsistent with every principle on which it was founded, and destructive of the great object for which it was formed". South Carolina, the president declared, stood on "the brink of insurrection and treason", and he appealed to the people of the state to reassert their allegiance to that Union. Jackson also denied the right of secession: "The Constitution ... forms a government not a league ... To say that any State may at pleasure secede from the Union is to say that the United States are not a nation." On December 28, Calhoun, who had been elected to the U.S. Senate, resigned as vice president. Jackson asked Congress to pass a "Force Bill" authorizing the military to enforce the tariff. It was attacked by Calhoun as despotism. Meanwhile, Calhoun and Clay began to work on a new compromise tariff. Jackson saw it as an effective way to end the confrontation, but insisted on the passage of the Force Bill before he signed. On March 2, he signed into law the Force Bill and the Tariff of 1833, both of which passed on March 1, 1833. The South Carolina Convention then met and rescinded its nullification ordinance, but nullified the Force Bill in a final act of defiance. Two months later, Jackson reflected on South Carolina's nullification: "the tariff was only the pretext, and disunion and southern confederacy the real object. The next pretext will be the negro, or slavery question". Bank War and Election of 1832 Bank Veto A few weeks after his inauguration, Jackson started looking into how he could replace the Second Bank of the United States. The Bank had been chartered by President Madison in 1816 to restore the United States economy after the War of 1812. Monroe had appointed Nicholas Biddle as the Bank's executive. The Bank was a repository for the country's public monies which also serviced the national debt; it was formed as a for-profit entity that looked after the concerns of its shareholders. Under the Bank's stewardship, the country was economically healthy and the currency was stable, but Jackson saw the Bank as a fourth branch of government run by an elite, what he called the "money power" that sought to control the labor and earnings of the "real people", who depend on their own efforts to succeed: the planters, farmers, mechanics, and laborers. Additionally, Jackson's own near bankruptcy in 1804 due to credit-fuelled land speculation had biased him against paper money and toward a policy favorable to hard money. In his First Annual Address in December 1829, Jackson openly challenged the Bank by questioning its constitutionality and the soundness of its money. Jackson's supporters further alleged that it gave preferential loans to speculators and merchants over artisans and farmers, that it used its money to bribe congressmen and the press, and that it had ties with foreign creditors. Biddle responded to Jackson's challenge in early 1830 by using the Bank's vast financial holding to ensure the Bank's reputation, and his supporters argued that the Bank was the key to prosperity and stable commerce. By the time of the 1832 election, Biddle had spent over $250,000, (), in printing pamphlets, lobbying for pro-Bank legislation, hiring agents and giving loans to editors and congressmen. On the surface, Jackson's and Biddle's positions did not appear irreconcilable. Jackson seemed open to keeping the Bank if it could include some degree of Federal oversight, limit its real estate holdings, and have its property subject to taxation by the states. Many of Jackson's cabinet members thought a compromise was possible. In 1831, Treasury Secretary Louis McLane told Biddle that Jackson was open to chartering a modified version of the Bank, but Biddle did not consult Jackson directly. Privately, Jackson expressed opposition to the Bank; publicly, he announced that he would leave the decision concerning the Bank in the hands of the people. Biddle was finally convinced to take open action by Henry Clay, who had decided to run for president against Jackson in the 1832 election. Biddle would agree to seek renewal of the charter two years earlier than scheduled. Clay argued that Jackson was in a bind. If he vetoed the charter, he would lose the votes of his pro-Bank constituents in Pennsylvania; but if he signed the charter, he would lose his anti-Bank constituents. After the recharter bill was passed, Jackson vetoed it on July 10, 1832, arguing that the country should not surrender the will of the majority to the desires of the wealthy. Election of 1832 The 1832 presidential election demonstrated the rapid development of political parties during Jackson's presidency. The Democratic Party's first national convention, held in Baltimore, nominated Jackson's choice for vice president, Martin Van Buren. The National Republican Party, which had held its first convention in Baltimore earlier in December 1831, nominated Clay, now a senator from Kentucky, and John Sergeant of Pennsylvania. An Anti-Masonic Party, with a platform built around opposition to Freemasonry, supported neither Jackson nor Clay, who both were Masons. The party nominated William Wirt of Maryland and Amos Ellmaker of Pennsylvania. In addition to the votes Jackson would lose because of the Bank veto, Clay hoped that Jackson's Indian Removal Act would alienate voters in the East; but Jackson's losses were offset by the Act's popularity in the West and Southwest. Clay had also expected that Jackson would lose votes because of his stand on internal improvements. Jackson had vetoed the Maysville Road bill, which funded an upgrade of a section of the National Road in Clay's state of Kentucky; as part of his justification, Jackson claimed it was unconstitutional to fund internal improvements using national funds for local projects. Clay's strategy failed. Jackson was able to mobilize the Democratic Party's strong political networks. The Northeast supported Jackson because he was in favor of maintaining a stiff tariff; the West supported him because the Indian Removal Act reduced the number of Native Americans in the region and made available more public land. Except for South Carolina, which passed the Ordinance of Nullification during the election month and refused to support any party by giving its votes to the future Governor of Virginia John B. Floyd, the South supported Jackson for implementing the Indian Removal Act, as well as for his willingness to compromise by signing the Tariff of 1832. Jackson won the election by a landslide, receiving 55 percent of the popular vote and 219 electoral votes. Removal of deposits and censure Jackson saw his victory as a mandate to continue his war on the Bank's control over the national economy. In 1833, Jackson signed an executive order ending the deposit of Treasury receipts in the bank. When Secretary of the Treasury McLane refused to execute the order, Jackson replaced him with William J. Duane, who also refused. Jackson then appointed Roger B. Taney as acting secretary, who implemented Jackson's policy. With the loss of federal deposits, the Bank had to contract its credit. Biddle used this contraction to create an economic downturn in an attempt to get Jackson to compromise. Biddle wrote, "Nothing but the evidence of suffering abroad will produce any effect in Congress." The attempt did not succeed, the economy recovered and Biddle was blamed for the recession. Jackson's actions led those who disagreed with him to form the Whig Party. They claimed to oppose Jackson's expansion of executive power, calling him "King Andrew the First", and naming their party after the English Whigs who opposed the British monarchy in the 17th century. In March 1832, the Senate censured Jackson for inappropriately taking authority for the Treasury Department when it was the responsibility of Congress and refused to confirm Taney's appointment as secretary of the treasury. In April, however, the House declared that the bank should not be rechartered. By July 1836, the Bank no longer held any federal deposits. Jackson had Federal funds deposited into state banks friendly to the administration's policies, which critics called pet banks. The number of these state banks more than doubled during Jackson's administration, and investment patterns changed. The Bank, which had been the federal government's fiscal agent, invested heavily in trade and financed interregional and international trade. State banks were more responsive to state governments, and invested heavily in land development, land speculation, and state public works projects. In spite of the efforts of Taney's successor, Levi Woodbury, to control them, the pet banks expanded their loans, helping to create a speculative boom in the final years of Jackson's administration. In January 1835, Jackson paid off the national debt, the only time in U.S. history that it had been accomplished. It was paid down through tariff revenues, carefully managing federal funding of internal improvements like roads and canals, and the sale of public lands. Between 1834 and 1836, the government had unprecedented spike in land sales: At its peak in 1836, the profits from land sales were eight to twelve times higher than a typical year. During Jackson's presidency, 63 million acres of public land—about the size of the state of Oklahoma—was sold. After Jackson stepped down from the presidency in 1837, a Democrat-majority Senate expunged Jackson's censure. Panic of 1837 Despite the economic boom following Jackson's victory in the Bank War, land speculation in the west caused the Panic of 1837. Jackson's transfer of federal monies to state banks in 1833 caused western banks to relax their lending standards; the Indian Removal Act made large amounts of former Native American lands available for purchase and speculation. Two of Jackson's acts in 1836 contributed to the Panic of 1837. One was the Specie Circular, which mandated western lands only be purchased by money backed by specie. The act was intended to stabilize the economy by reducing speculation on credit, but it caused a drain of gold and silver from the Eastern banks to the Western banks to address the needs of financing land transactions. The other was the Deposit and Distribution Act, which transferred federal monies from eastern to western state banks. Together, they left Eastern banks unable to pay specie to the British when they recalled their loans to address their economic problems in international trade. The panic drove the U.S. economy into a depression that lasted until 1841. Physical assault and assassination attempt Jackson was the first president to be subjected to physical assault as well as an assassination attempt. On May 6, 1833, Robert B. Randolph struck Jackson in the face with his hand because Jackson had ordered Randolph's dismissal from the navy for embezzlement. Jackson declined to press charges. While leaving the United States Capitol on January 30, 1835, Richard Lawrence, an unemployed house painter from England, aimed a pistol at Jackson, which misfired. Lawrence pulled out a second pistol, which also misfired. Jackson attacked Lawrence with his cane until others intervened to restrain Lawrence, who was later found not guilty by reason of insanity and institutionalized. Slavery During Jackson's presidency, slavery remained a political issue. Though federal troops were used to crush Nat Turner's slave rebellion in 1831, Jackson ordered them withdrawn immediately afterwards despite the petition of local citizens for them to remain for protection. Jackson considered the issue too divisive to the nation and to the delicate alliances of the Democratic Party, while sympathetic newspapers argued for excluding slavery from federal politics and keeping it at the state level. Jackson's view was challenged when the American Anti-Slavery Society formally agitated for abolition by sending anti-slavery tracts through the postal system into the South in 1835. Jackson condemned these agitators as "monsters" who should atone with their lives because they were attempting to destroy the Union by encouraging sectionalism. The act provoked riots in Charleston, and pro-slavery Southerners demanded that the postal service ban distribution of the materials. To address the issue, Jackson authorized that the tracts could be sent only to subscribers, whose names could be made publicly accountable. That December, Jackson called on Congress to prohibit the circulation through the South of "incendiary publications intended to instigate the slaves to insurrection". Foreign affairs The Jackson administration successfully negotiated trade agreements with Great Britain, Spain, Russia, the Ottoman Empire, and Siam. In his First Annual Message to Congress, Jackson addressed the issues of spoliation claims, demands of compensation for the capture of American ships and sailors by foreign nations during the Napoleonic Wars. Using a combination of bluster and tact, he successfully settled these claims with Denmark, Portugal, and Spain, but he had difficulty collecting spoliation claims from France, which was unwilling to pay an indemnity agreed to in an earlier treaty. Jackson asked Congress in 1834 to authorize reprisals against French property if the country failed to make payment, as well as to arm for defense. In response, France put its Caribbean fleet on a wartime footing. Both sides wanted to avoid a conflict, but the French wanted an apology for Jackson's belligerence. In his 1835 Annual Message to the Congress, Jackson asserted that he refused to apologize, but stated that he did not intend to "menace or insult the Government of France". The French were assuaged and agreed to pay $5,000,000 () to settle the claims. Since the early 1820s, large numbers of Americans had been immigrating into Texas, a territory of the newly independent nation of Mexico. As early as 1824, Jackson had expressed a desire to acquire the region for the United States. In 1829, he attempted to purchase it, but Mexico did not want to sell. By 1830, there were twice as many settlers from the United States as from Mexico, leading to tensions with the Mexican government that started the Texas Revolution. During the conflict, Jackson covertly allowed the settlers to obtain weapons and money from the United States. They defeated the Mexican military in April 1836 and soon afterward declared the region an independent country, the Republic of Texas. The new Republic asked Jackson to recognize and annex it. Although Jackson wanted to do so, he was hesitant because he was unsure it could maintain independence from Mexico. He also was concerned because Texas had legalized slavery, which was an issue that could divide the Democrats during the 1836 election. Jackson recognized the Republic of Texas on the last full day of his presidency, March 3, 1837. Judicial appointments Jackson appointed six justices to the Supreme Court. Most were undistinguished. Jackson nominated Roger B. Taney in January 1835 to the Court in reward for his services, but the nomination failed to win Senate approval. When Chief Justice Marshall died in 1835, Jackson nominated Taney for Chief Justice; he was confirmed by the new Senate, serving as Chief Justice until 1864. He was regarded with respect during his career on the bench, but he is most remembered for his decision in Dred Scott v. Sandford. States admitted to the Union Two new states were admitted into the Union during Jackson's presidency: Arkansas (June 15, 1836) and Michigan (January 26, 1837). Both states increased Democratic power in Congress and helped Van Buren win the presidency in 1836, as new states tended to support the party that had done the most to admit them. Later life and death (1837–1845) In 1837, Jackson retired to the Hermitage and immediately began putting its affairs in order, as it had been poorly managed in his absence. Though Jackson was in ill health and had lost some of his popularity because he was blamed for the Panic of 1837, he remained influential in national and state politics. Jackson supported an Independent Treasury system as a solution to the panic, which would hold the money balances of the government in the form of gold or silver and would be restricted from printing paper money to prevent further inflation. This system was implemented in 1846. The depression still continued, and Van Buren became unpopular. The Whig Party nominated war hero William Henry Harrison and former Democrat John Tyler for the 1840 presidential election. They used a campaign style similar to that of the Democrats: Van Buren was depicted as an uncaring aristocrat, while Harrison's war record was glorified, and he was portrayed as a man of the people. Jackson campaigned loyally for Van Buren in Tennessee. He favored James K. Polk as vice presidential candidate, but no candidate for that office was chosen. To Jackson's dismay, Harrison won the 1840 election with the Whigs capturing majorities in both houses of Congress. Harrison died only a month into his term, and was replaced by Tyler. Jackson was encouraged because Tyler was not bound to party loyalties. Tyler angered the Whigs in 1841 when he vetoed two Whig-sponsored bills to establish a new national bank. Jackson and other Democrats praised Tyler, but Tyler's entire cabinet, except Daniel Webster, resigned. Jackson lobbied for the annexation of Texas, insisting that it belonged to the United States as part of the Louisiana Purchase. He thought that annexation would cause national division over slavery, but feared the British could use Texas as a base to threaten the United States. Jackson wrote several letters to Texas president Sam Houston, urging him to wait for the Senate to approve annexation and explaining how much Texas would benefit as a part of the United States. Tyler signed a treaty of annexation in April 1844, but it became associated with the expansion of slavery and was not ratified. Henry Clay, the Whig nominee for the 1844 presidential election, and Van Buren, Jackson's preferred candidate for the Democratic Party, both opposed annexation. Disappointed by Van Buren, Jackson convinced Polk, who was to be Van Buren's running mate, to run as the Democratic Party's presidential nominee instead. Polk defeated Van Buren for the nomination, and Jackson convinced Tyler not to run as an independent by bringing him back into the Democratic Party. Polk won the election, the Senate passed a bill to annex Texas, and it was signed on March 1, 1845. Jackson died of dropsy, tuberculosis and heart failure at 78 years of age on June 8, 1845. He was surrounded by family and friends at his deathbed, and his last words were, "Oh, do not cry. Be good children and we will all meet in Heaven." He was buried in the same tomb as his wife Rachel. Personal life Family Jackson and Rachel had no children together but adopted Andrew Jackson Jr., the son of Rachel's deceased brother Severn Donelson. The Jacksons acted as guardians for Donelson's other children: John Samuel, Daniel Smith, and Andrew Jackson. They were also guardians for Andrew Jackson Hutchings, Rachel's orphaned grand nephew, and the orphaned children of a friend, Edward Butler – Caroline, Eliza, Edward, and Anthony – who lived with the Jacksons after their father died. Jackson also had three Creek children living with them: Lyncoya, a Creek orphan Jackson had adopted after the Battle of Tallushatchee, and two boys they called Theodore and Charley. For the only time in U.S. history, two women acted simultaneously as unofficial first lady for the widower Jackson. Rachel's niece Emily Donelson was married to Andrew Jackson Donelson (who acted as Jackson's private secretary) and served as hostess at the White House. The president and Emily became estranged for over a year during the Petticoat affair, but they eventually reconciled and she resumed her duties as White House hostess. Sarah Yorke Jackson, the wife of Andrew Jackson Jr., became co-hostess of the White House in 1834, and took over all hostess duties after Emily died from tuberculosis in 1836. Temperament Jackson had a reputation for being short-tempered and violent, which terrified his opponents. He was able to use his temper strategically to accomplish what he wanted. He could keep it in check when necessary: his behavior was friendly and urbane when he went to Washington as senator during the campaign leading up to the 1824 election. According to Van Buren, he remained calm in times of difficulty and made his decisions deliberatively. He had the tendency to take things personally. If someone crossed him, he would often become obsessed with crushing them. For example, on the last day of his presidency, Jackson declared he had only two regrets: that he had not hanged Henry Clay or shot John C. Calhoun. He also had a strong sense of loyalty. He considered threats to his friends as threats to himself, but he demanded unquestioning loyalty in return. Jackson was self-confident, without projecting a sense of self-importance. This self-confidence gave him the ability to persevere in the face of adversity. Once he decided on a plan of action, he would adhere to it. His reputation for being both quick-tempered and confident worked to his advantage; it misled opponents to see him as simple and direct, leading them to often understimate his political shrewdness. Religious faith In 1838, Jackson became an official member of the First Presbyterian Church in Nashville. Both his mother and his wife had been devout Presbyterians all their lives, but Jackson stated that he had postponed officially entering the church until after his retirement to avoid accusations that he had done so for political reasons. Legacy Jackson's legacy is controversial and polarized. Jackson's contemporary, Alexis de Tocqueville, depicted Jackson as the spokesperson of the majority and their passions. He has been variously described as a frontiersman personifying the independence of the American West, a slave-owning member of the Southern gentry, and a populist who promoted faith in the wisdom of the ordinary citizen. He has been represented as a statesman who substantially advanced the spirit of democracy and upheld the foundations of American constitutionalism, as well as an autocratic demagogue who crushed political opposition and trampled the law. In the 1920s, Jackson's rise to power became associated with the idea of the "common man". This idea defined the age as a populist rejection of social elites and a vindication of every person's value independent of class and status. Jackson was seen as its personification, an individual free of societal constraints who can achieve great things. In 1945, Arthur M. Schlesinger Jr.'s influential Age of Jackson redefined Jackson's legacy through the lens of Franklin D. Roosevelt's New Deal, describing the common man as a member of the working class struggling against exploitation by business concerns. In the twenty-first century, Jackson's Indian Removal Act has been described as ethnic cleansing: the use of force, terror and violence to make an area ethnically homogeneous. To achieve the goal of separating Native Americans from the whites, coercive force such as threats and bribes were used to effect removal and unauthorized military force was used when there was resistance, as in the case of the Second Seminole War. The act has been discussed in the context of genocide, and its role in the long-term destruction of Native American societies and their cultures continues to be debated. His legacy has been variously used by later presidents. Abraham Lincoln referenced Jackson's ideas when negotiating the challenges to the Union that he faced during 1861, including Jackson's understanding of the constitution during the nullification crisis and the president's right to interpret the constitution. Franklin D. Roosevelt used Jackson to redefine the Democratic Party, describing him as a defender of the exploited and downtrodden and as a fighter for social justice and human rights. Donald Trump used Jackson's legacy to present himself as the president of the common man, praising Jackson for saving the country from a rising aristocracy and protecting American workers with a tariff. In 2016, President Barack Obama's administration announced it was removing Jackson's portrait from the $20 bill and replacing it with one of Harriet Tubman. Though the plan was put on hold during Trump's presidency, President Joe Biden's administration resumed it in 2021. Jackson is usually rated highly as a president, but his reputation is dropping. His contradictory legacy is shown in opinion polls. A 2014 survey of political scientists rated Jackson as the ninth-highest rated president but the third-most polarizing. He was also rated the third-most overrated president. In a C-SPAN poll, Jackson was ranked the 13th in 2009, 18th in 2017, and 22nd in 2021. Writings (11 volumes to date; 17 volumes projected). Ongoing project to print all of Jackson's papers. Vol. I, (1770–1803); Vol. II, (1804–1813); Vol. III, (1814–1815); Vol. IV, (1816–1820); Vol. V, (1821–1824); Vol. VI, (1825–1828); Vol. VII, (1829); Vol. VIII, (1830); Vol. IX, (1831); Vol. X, (1832); Vol. XI, (1833) (7 volumes; 2 available online). Vol III, (1820-1828) ; Vol IV, (1829-1832) Reprints Jackson's major messages and reports. Notes References Bibliography Biographies Books * Journal articles and dissertations Primary sources External links Scholarly coverage of Jackson at Miller Center, U of Virginia The Papers of Andrew Jackson at the Avalon Project The Hermitage, home of President Andrew Jackson A digital archive providing access to manuscript images of many of Jackson's documents. 1767 births 1845 deaths 18th-century American politicians 18th-century Presbyterians 19th-century American politicians 19th-century deaths from tuberculosis 19th-century presidents of the United States United States Army personnel of the War of 1812 American militia generals American planters American Presbyterians American prosecutors American Revolutionary War prisoners of war held by Great Britain American shooting survivors Burials in Tennessee Andrew Jackson family Congressional Gold Medal recipients Deaths from edema Democratic Party presidents of the United States Democratic Party (United States) presidential nominees Democratic-Republican Party members of the United States House of Representatives from Tennessee Democratic-Republican Party United States senators American duellists Florida Democratic-Republicans American Freemasons Governors of Florida Territory Grand Masters of the Grand Lodge of Tennessee Hall of Fame for Great Americans inductees 1830s in the United States Infectious disease deaths in Tennessee Negro Fort Members of the American Antiquarian Society North Carolina lawyers People from Lancaster County, South Carolina Politicians from Nashville, Tennessee People of pre-statehood Tennessee People of the Creek War Presidents of the United States Second Party System Tennessee Democrats Tennessee Jacksonians Justices of the Tennessee Supreme Court United States Army generals United States Army personnel of the Seminole Wars United States military governors Candidates in the 1824 United States presidential election Candidates in the 1828 United States presidential election Candidates in the 1832 United States presidential election United States senators from Tennessee Tuberculosis deaths in Tennessee United States senators who owned slaves Members of the United States House of Representatives who owned slaves Native American genocide perpetrators

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https://en.wikipedia.org/wiki/Aleksandr%20Solzhenitsyn

Aleksandr Solzhenitsyn

Aleksandr Isayevich Solzhenitsyn (11 December 1918 – 3 August 2008) was a Russian writer. A prominent Soviet dissident, Solzhenitsyn was an outspoken critic of communism and helped to raise global awareness of political repression in the Soviet Union, in particular the Gulag system. Solzhenitsyn was born into a family that defied the Soviet anti-religious campaign in the 1920s and remained devout members of the Russian Orthodox Church. However, Solzhenitsyn lost his faith in Christianity, became an atheist, and embraced Marxism–Leninism. While serving as a captain in the Red Army during World War II, Solzhenitsyn was arrested by SMERSH and sentenced to eight years in the Gulag and then internal exile for criticizing Soviet leader Joseph Stalin in a private letter. As a result of his experience in prison and the camps, he gradually became a philosophically minded Eastern Orthodox Christian. As a result of the Khrushchev Thaw, Solzhenitsyn was released and exonerated. He pursued writing novels about repression in the Soviet Union and his experiences. He published his first novel, One Day in the Life of Ivan Denisovich in 1962, with approval from Soviet leader Nikita Khrushchev, which was an account of Stalinist repressions. Solzhenitsyn's last work to be published in the Soviet Union was Matryona's Place in 1963. Following the removal of Khrushchev from power, the Soviet authorities attempted to discourage Solzhenitsyn from continuing to write. He continued to work on further novels and their publication in other countries including Cancer Ward in 1966, In the First Circle in 1968, August 1914 in 1971, and The Gulag Archipelago in 1973, the publication of which outraged Soviet authorities. In 1974, Solzhenitsyn was stripped of his Soviet citizenship and flown to West Germany. In 1976, he moved with his family to the United States, where he continued to write. In 1990, shortly before the dissolution of the Soviet Union, his citizenship was restored, and four years later he returned to Russia, where he remained until his death in 2008. He was awarded the 1970 Nobel Prize in Literature "for the ethical force with which he has pursued the indispensable traditions of Russian literature", and The Gulag Archipelago was a highly influential work that "amounted to a head-on challenge to the Soviet state", and sold tens of millions of copies. Biography Early years Solzhenitsyn was born in Kislovodsk (now in Stavropol Krai, Russia). His father, Isaakiy Semyonovich Solzhenitsyn, was of Russian descent and his mother, Taisiya Zakharovna (née Shcherbak), was of Ukrainian descent. Taisiya's father had risen from humble beginnings to become a wealthy landowner, acquiring a large estate in the Kuban region in the northern foothills of the Caucasus and during World War I, Taisiya had gone to Moscow to study. While there she met and married Isaakiy, a young officer in the Imperial Russian Army of Cossack origin and fellow native of the Caucasus region. The family background of his parents is vividly brought to life in the opening chapters of August 1914, and in the later Red Wheel novels. In 1918, Taisiya became pregnant with Aleksandr. On 15 June, shortly after her pregnancy was confirmed, Isaakiy was killed in a hunting accident. Aleksandr was raised by his widowed mother and his aunt in lowly circumstances. His earliest years coincided with the Russian Civil War. By 1930 the family property had been turned into a collective farm. Later, Solzhenitsyn recalled that his mother had fought for survival and that they had to keep his father's background in the old Imperial Army a secret. His educated mother encouraged his literary and scientific learnings and raised him in the Russian Orthodox faith; she died in 1944 having never remarried. As early as 1936, Solzhenitsyn began developing the characters and concepts for planned epic work on World War I and the Russian Revolution. This eventually led to the novel August 1914; some of the chapters he wrote then still survive. Solzhenitsyn studied mathematics and physics at Rostov State University. At the same time, he took correspondence courses from the Moscow Institute of Philosophy, Literature and History, which by this time were heavily ideological in scope. As he himself makes clear, he did not question the state ideology or the superiority of the Soviet Union until he was sentenced to time in the camps. World War II During the war, Solzhenitsyn served as the commander of a sound-ranging battery in the Red Army, was involved in major action at the front, and was twice decorated. He was awarded the Order of the Red Star on 8 July 1944 for sound-ranging two German artillery batteries and adjusting counterbattery fire onto them, resulting in their destruction. A series of writings published late in his life, including the early uncompleted novel Love the Revolution!, chronicle his wartime experience and growing doubts about the moral foundations of the Soviet regime. While serving as an artillery officer in East Prussia, Solzhenitsyn witnessed war crimes against local German civilians by Soviet military personnel. Of the atrocities, Solzhenitsyn wrote: "You know very well that we've come to Germany to take our revenge" for Nazi atrocities committed in the Soviet Union. The noncombatants and the elderly were robbed of their meager possessions and women and girls were gang-raped. A few years later, in the forced labor camp, he memorized a poem titled "Prussian Nights" about a woman raped to death in East Prussia. In this poem, which describes the gang-rape of a Polish woman whom the Red Army soldiers mistakenly thought to be a German, the first-person narrator comments on the events with sarcasm and refers to the responsibility of official Soviet writers like Ilya Ehrenburg. In The Gulag Archipelago, Solzhenitsyn wrote, "There is nothing that so assists the awakening of omniscience within us as insistent thoughts about one's own transgressions, errors, mistakes. After the difficult cycles of such ponderings over many years, whenever I mentioned the heartlessness of our highest-ranking bureaucrats, the cruelty of our executioners, I remember myself in my Captain's shoulder boards and the forward march of my battery through East Prussia, enshrouded in fire, and I say: 'So were we any better?'" Imprisonment In February 1945, while serving in East Prussia, Solzhenitsyn was arrested by SMERSH for writing derogatory comments in private letters to a friend, Nikolai Vitkevich, about the conduct of the war by Joseph Stalin, whom he called "Khozyain" ("the boss"), and "Balabos" (Yiddish rendering of Hebrew baal ha-bayit for "master of the house"). He also had talks with the same friend about the need for a new organization to replace the Soviet regime. Solzhenitsyn was accused of anti-Soviet propaganda under Article 58, paragraph 10 of the Soviet criminal code, and of "founding a hostile organization" under paragraph 11. Solzhenitsyn was taken to the Lubyanka prison in Moscow, where he was interrogated. On 9 May 1945, it was announced that Germany had surrendered and all of Moscow broke out in celebrations with fireworks and searchlights illuminating the sky to celebrate the victory in the Great Patriotic War. From his cell in the Lubyanka, Solzhenitsyn remembered: "Above the muzzle of our window, and from all the other cells of the Lubyanka, and from all the windows of the Moscow prisons, we too, former prisoners of war and former front-line soldiers, watched the Moscow heavens, patterned with fireworks and crisscrossed with beams of searchlights. There was no rejoicing in our cells and no hugs and no kisses for us. That victory was not ours." On 7 July 1945, he was sentenced in his absence by Special Council of the NKVD to an eight-year term in a labour camp. This was the usual sentence for most crimes under Article 58 at the time. The first part of Solzhenitsyn's sentence was served in several work camps; the "middle phase", as he later referred to it, was spent in a sharashka (a special scientific research facility run by Ministry of State Security), where he met Lev Kopelev, upon whom he based the character of Lev Rubin in his book The First Circle, published in a self-censored or "distorted" version in the West in 1968 (an English translation of the full version was eventually published by Harper Perennial in October 2009). In 1950, Solzhenitsyn was sent to a "Special Camp" for political prisoners. During his imprisonment at the camp in the town of Ekibastuz in Kazakhstan, he worked as a miner, bricklayer, and foundry foreman. His experiences at Ekibastuz formed the basis for the book One Day in the Life of Ivan Denisovich. One of his fellow political prisoners, Ion Moraru, remembers that Solzhenitsyn spent some of his time at Ekibastuz writing. While there, Solzhenitsyn had a tumor removed. His cancer was not diagnosed at the time. In March 1953, after his sentence ended, Solzhenitsyn was sent to internal exile for life at Birlik, a village in Baidibek District of South Kazakhstan. His undiagnosed cancer spread until, by the end of the year, he was close to death. In 1954, Solzhenitsyn was permitted to be treated in a hospital in Tashkent, where his tumor went into remission. His experiences there became the basis of his novel Cancer Ward and also found an echo in the short story "The Right Hand." It was during this decade of imprisonment and exile that Solzhenitsyn developed the philosophical and religious positions of his later life, gradually becoming a philosophically minded Eastern Orthodox Christian as a result of his experience in prison and the camps. He repented for some of his actions as a Red Army captain, and in prison compared himself to the perpetrators of the Gulag. His transformation is described at some length in the fourth part of The Gulag Archipelago ("The Soul and Barbed Wire"). The narrative poem The Trail (written without benefit of pen or paper in prison and camps between 1947 and 1952) and the 28 poems composed in prison, forced-labour camp, and exile also provide crucial material for understanding Solzhenitsyn's intellectual and spiritual odyssey during this period. These "early" works, largely unknown in the West, were published for the first time in Russian in 1999 and excerpted in English in 2006. Marriages and children On 7 April 1940, while at the university, Solzhenitsyn married Natalia Alekseevna Reshetovskaya. They had just over a year of married life before he went into the army, then to the Gulag. They divorced in 1952, a year before his release because the wives of Gulag prisoners faced the loss of work or residence permits. After the end of his internal exile, they remarried in 1957, divorcing a second time in 1972. Reshetovskaya wrote negatively of Solzhenitsyn in her memoirs, accusing him of having affairs, and said of the relationship that "[Solzhenitsyn]'s despotism ... would crush my independence and would not permit my personality to develop." In her 1974 memoir, Sanya: My Life with Aleksandr Solzhenitsyn, she wrote that she was "perplexed" that the West had accepted The Gulag Archipelago as "the solemn, ultimate truth", saying its significance had been "overestimated and wrongly appraised". Pointing out that the book's subtitle is "An Experiment in Literary Investigation", she said that her husband did not regard the work as "historical research, or scientific research". She contended that it was, rather, a collection of "camp folklore", containing "raw material" which her husband was planning to use in his future productions. In 1973, Solzhenitsyn married his second wife, Natalia Dmitrievna Svetlova, a mathematician who had a son, Dmitri Turin, from a brief prior marriage. He and Svetlova (born 1939) had three sons: Yermolai (1970), Ignat (1972), and Stepan (1973). Dmitri Turin died on 18 March 1994, aged 32, at his home in New York City. After prison After Khrushchev's Secret Speech in 1956, Solzhenitsyn was freed from exile and exonerated. Following his return from exile, Solzhenitsyn was, while teaching at a secondary school during the day, spending his nights secretly engaged in writing. In his Nobel Prize acceptance speech he wrote that "during all the years until 1961, not only was I convinced I should never see a single line of mine in print in my lifetime, but, also, I scarcely dared allow any of my close acquaintances to read anything I had written because I feared this would become known." In 1960, aged 42, Solzhenitsyn approached Aleksandr Tvardovsky, a poet and the chief editor of the Novy Mir magazine, with the manuscript of One Day in the Life of Ivan Denisovich. It was published in edited form in 1962, with the explicit approval of Nikita Khrushchev, who defended it at the presidium of the Politburo hearing on whether to allow its publication, and added: "There's a Stalinist in each of you; there's even a Stalinist in me. We must root out this evil." The book quickly sold out and became an instant hit. In the 1960s, while Solzhenitsyn was publicly known to be writing Cancer Ward, he was simultaneously writing The Gulag Archipelago. During Khrushchev's tenure, One Day in the Life of Ivan Denisovich was studied in schools in the Soviet Union, as were three more short works of Solzhenitsyn's, including his short story "Matryona's Home", published in 1963. These would be the last of his works published in the Soviet Union until 1990. One Day in the Life of Ivan Denisovich brought the Soviet system of prison labour to the attention of the West. It caused as much of a sensation in the Soviet Union as it did in the West—not only by its striking realism and candour, but also because it was the first major piece of Soviet literature since the 1920s on a politically charged theme, written by a non-party member, indeed a man who had been to Siberia for "libelous speech" about the leaders, and yet its publication had been officially permitted. In this sense, the publication of Solzhenitsyn's story was almost unheard of instance of free, unrestrained discussion of politics through literature. However, after Khrushchev had been ousted from power in 1964, the time for such raw, exposing works came to an end. Later years in the Soviet Union Solzhenitsyn made an unsuccessful attempt, with the help of Tvardovsky, to have his novel Cancer Ward legally published in the Soviet Union. This required the approval of the Union of Writers. Though some there appreciated it, the work was ultimately denied publication unless it was to be revised and cleaned of suspect statements and anti-Soviet insinuations. After Khrushchev's removal in 1964, the cultural climate again became more repressive. Publishing of Solzhenitsyn's work quickly stopped; as a writer, he became a non-person, and, by 1965, the KGB had seized some of his papers, including the manuscript of The First Circle. Meanwhile, Solzhenitsyn continued to secretly and feverishly work on the most well-known of his writings, The Gulag Archipelago. The seizing of his novel manuscript first made him desperate and frightened, but gradually he realized that it had set him free from the pretenses and trappings of being an "officially acclaimed" writer, a status which had become familiar but which was becoming increasingly irrelevant. After the KGB had confiscated Solzhenitsyn's materials in Moscow, in the years 1965 to 1967, the preparatory drafts of The Gulag Archipelago were turned into finished typescript in hiding at his friends' homes in Soviet Estonia. Solzhenitsyn had befriended Arnold Susi, a lawyer and former Minister of Education of Estonia in a Lubyanka Building prison cell. After completion, Solzhenitsyn's original handwritten script was kept hidden from the KGB in Estonia by Arnold Susi's daughter Heli Susi until the collapse of the Soviet Union. In 1969, Solzhenitsyn was expelled from the Union of Writers. In 1970, he was awarded the Nobel Prize in Literature. He could not receive the prize personally in Stockholm at that time, since he was afraid he would not be let back into the Soviet Union. Instead, it was suggested he should receive the prize in a special ceremony at the Swedish embassy in Moscow. The Swedish government refused to accept this solution because such a ceremony and the ensuing media coverage might upset the Soviet Union and damage Swedish-Soviet relations. Instead, Solzhenitsyn received his prize at the 1974 ceremony after he had been expelled from the Soviet Union. In 1973, another manuscript written by Solzhenitsyn was confiscated by the KGB after his friend Elizaveta Voronyanskaya was questioned non-stop for five days until she revealed its location, according to a statement by Solzhenitsyn to Western reporters on September 6, 1973. According to Solzhenitsyn, "When she returned home, she hanged herself." The Gulag Archipelago was composed from 1958 to 1967, and has sold over thirty million copies in thirty-five languages. It was a three-volume, seven-part work on the Soviet prison camp system, which drew from Solzhenitsyn's experiences and the testimony of 256 former prisoners and Solzhenitsyn's own research into the history of the Russian penal system. It discusses the system's origins from the founding of the Communist regime, with Vladimir Lenin having responsibility, detailing interrogation procedures, prisoner transports, prison camp culture, prisoner uprisings and revolts such as the Kengir uprising, and the practice of internal exile. Soviet and Communist studies historian and archival researcher Stephen G. Wheatcroft wrote that the book was essentially a "literary and political work", and "never claimed to place the camps in a historical or social-scientific quantitative perspective" but that in the case of qualitative estimates, Solzhenitsyn gave his high estimate as he wanted to challenge the Soviet authorities to show that "the scale of the camps was less than this." Historian J. Arch Getty wrote of Solzhenitsyn's methodology that "such documentation is methodically unacceptable in other fields of history", which gives priority to vague hearsay and leads towards selective bias. According to journalist Anne Applebaum, who has made extensive research on the Gulag, The Gulag Archipelago'''s rich and varied authorial voice, its unique weaving together of personal testimony, philosophical analysis, and historical investigation, and its unrelenting indictment of Communist ideology made it one of the most influential books of the 20th century. On 8 August 1971, the KGB allegedly attempted to assassinate Solzhenitsyn using an unknown chemical agent (most likely ricin) with an experimental gel-based delivery method. The attempt left him seriously ill but he survived. Although The Gulag Archipelago was not published in the Soviet Union, it was extensively criticized by the Party-controlled Soviet press. An editorial in Pravda on 14 January 1974 accused Solzhenitsyn of supporting "Hitlerites" and making "excuses for the crimes of the Vlasovites and Bandera gangs." According to the editorial, Solzhenitsyn was "choking with pathological hatred for the country where he was born and grew up, for the socialist system, and for Soviet people." During this period, he was sheltered by the cellist Mstislav Rostropovich, who suffered considerably for his support of Solzhenitsyn and was eventually forced into exile himself. Expulsion from the Soviet Union In a discussion of its options in dealing with Solzhenitsyn, the members of the Politburo considered his arrest and imprisonment and his expulsion to a capitalist country willing to take him. Guided by KGB chief Yuri Andropov, and following a statement from West German Chancellor Willy Brandt that Solzhenitsyn could live and work freely in West Germany, it was decided to deport the writer directly to that country. In the West On 12 February 1974, Solzhenitsyn was arrested and deported the next day from the Soviet Union to Frankfurt, West Germany and stripped of his Soviet citizenship. The KGB had found the manuscript for the first part of The Gulag Archipelago. U.S. military attaché William Odom managed to smuggle out a large portion of Solzhenitsyn's archive, including the author's membership card for the Writers' Union and his Second World War military citations. Solzhenitsyn paid tribute to Odom's role in his memoir Invisible Allies (1995). In West Germany, Solzhenitsyn lived in Heinrich Böll's house in . He then moved to Zürich, Switzerland before Stanford University invited him to stay in the United States to "facilitate your work, and to accommodate you and your family". He stayed at the Hoover Tower, part of the Hoover Institution, before moving to Cavendish, Vermont, in 1976. He was given an honorary literary degree from Harvard University in 1978 and on 8 June 1978 he gave a commencement address, condemning, among other things, the press, the lack of spirituality and traditional values, and the anthropocentrism of Western culture. Solzhenitsyn also received an honorary degree from the College of the Holy Cross in 1984. On 19 September 1974, Yuri Andropov approved a large-scale operation to discredit Solzhenitsyn and his family and cut his communications with Soviet dissidents. The plan was jointly approved by Vladimir Kryuchkov, Philipp Bobkov, and Grigorenko (heads of First, Second and Fifth KGB Directorates). The residencies in Geneva, London, Paris, Rome and other European cities participated in the operation. Among other active measures, at least three StB agents became translators and secretaries of Solzhenitsyn (one of them translated the poem Prussian Nights), keeping the KGB informed regarding all contacts by Solzhenitsyn. The KGB also sponsored a series of hostile books about Solzhenitsyn, most notably a "memoir published under the name of his first wife, Natalia Reshetovskaya, but probably mostly composed by Service A", according to historian Christopher Andrew. Andropov also gave an order to create "an atmosphere of distrust and suspicion between Pauk and the people around him" by feeding him rumors that the people around him were KGB agents, and deceiving him at every opportunity. Among other things, he continually received envelopes with photographs of car crashes, brain surgery and other disturbing imagery. After the KGB harassment in Zürich, Solzhenitsyn settled in Cavendish, Vermont, reduced communications with others. His influence and moral authority for the West diminished as he became increasingly isolated and critical of Western individualism. KGB and CPSU experts finally concluded that he alienated American listeners by his "reactionary views and intransigent criticism of the US way of life", so no further active measures would be required. Over the next 17 years, Solzhenitsyn worked on his dramatized history of the Russian Revolution of 1917, The Red Wheel. By 1992, four sections had been completed and he had also written several shorter works. Solzhenitsyn's warnings about the dangers of Communist aggression and the weakening of the moral fiber of the West were generally well received in Western conservative circles (e.g. Ford administration staffers Dick Cheney and Donald Rumsfeld advocated on Solzhenitsyn's behalf for him to speak directly to President Gerald Ford about the Soviet threat), prior to and alongside the tougher foreign policy pursued by US President Ronald Reagan. At the same time, liberals and secularists became increasingly critical of what they perceived as his reactionary preference for Russian nationalism and the Russian Orthodox religion. Solzhenitsyn also harshly criticised what he saw as the ugliness and spiritual vapidity of the dominant pop culture of the modern West, including television and much of popular music: "...the human soul longs for things higher, warmer, and purer than those offered by today's mass living habits... by TV stupor and by intolerable music." Despite his criticism of the "weakness" of the West, Solzhenitsyn always made clear that he admired the political liberty which was one of the enduring strengths of Western democratic societies. In a major speech delivered to the International Academy of Philosophy in Liechtenstein on 14 September 1993, Solzhenitsyn implored the West not to "lose sight of its own values, its historically unique stability of civic life under the rule of law—a hard-won stability which grants independence and space to every private citizen." In a series of writings, speeches, and interviews after his return to his native Russia in 1994, Solzhenitsyn spoke about his admiration for the local self-government he had witnessed first hand in Switzerland and New England."The Cavendish Farewell" in Ericson (2009) pp. 606–07 He "praised 'the sensible and sure process of grassroots democracy, in which the local population solves most of its problems on its own, not waiting for the decisions of higher authorities.'" Solzhenitsyn's patriotism was inward-looking. He called for Russia to "renounce all mad fantasies of foreign conquest and begin the peaceful long, long long period of recuperation," as he put it in a 1979 BBC interview with Latvian-born BBC journalist Janis Sapiets. Return to Russia In 1990, his Soviet citizenship was restored, and, in 1994, he returned to Russia with his wife, Natalia, who had become a United States citizen. Their sons stayed behind in the United States (later, his eldest son Yermolai returned to Russia). From then until his death, he lived with his wife in a dacha in Troitse-Lykovo in west Moscow between the dachas once occupied by Soviet leaders Mikhail Suslov and Konstantin Chernenko. A staunch believer in traditional Russian culture, Solzhenitsyn expressed his disillusionment with post-Soviet Russia in works such as Rebuilding Russia, and called for the establishment of a strong presidential republic balanced by vigorous institutions of local self-government. The latter would remain his major political theme. Solzhenitsyn also published eight two-part short stories, a series of contemplative "miniatures" or prose poems, and a literary memoir on his years in the West The Grain Between the Millstones, translated and released as two works by the University of Notre Dame as part of the Kennan Institute's Solzhenitsyn Initiative. The first, Between Two Millstones, Book 1: Sketches of Exile (1974–1978), was translated by Peter Constantine and published in October 2018, the second, Book 2: Exile in America (1978–1994) translated by Clare Kitson and Melanie Moore and published in October 2020. Once back in Russia Solzhenitsyn hosted a television talk show program. Its eventual format was Solzhenitsyn delivering a 15-minute monologue twice a month; it was discontinued in 1995. Solzhenitsyn became a supporter of Vladimir Putin, who said he shared Solzhenitsyn's critical view towards the Russian Revolution. All of Solzhenitsyn's sons became U.S. citizens. One, Ignat, is a pianist and conductor. Another Solzhenitsyn son, Yermolai, works for the Moscow office of McKinsey & Company, a management consultancy firm, where he is a senior partner. Death Solzhenitsyn died of heart failure near Moscow on 3 August 2008, at the age of 89. A burial service was held at Donskoy Monastery, Moscow, on 6 August 2008. He was buried the same day in the monastery, in a spot he had chosen. Russian and world leaders paid tribute to Solzhenitsyn following his death. Views on history and politics On Christianity, Tsarism, and Russian nationalism According to William Harrison, Solzhenitsyn was an "arch-reactionary", who argued that the Soviet State "suppressed" traditional Russian and Ukrainian culture, called for the creation of a united Slavic state encompassing Russia, Ukraine, and Belarus, and who was a fierce opponent of Ukrainian independence. It is well documented that his negative views on Ukrainian independence became more radical over the years. Harrison also alleged that Solzhenitsyn held Pan-Slavist and monarchist views. According to Harrison, "His historical writing is imbued with a hankering after an idealized Tsarist era when, seemingly, everything was rosy. He sought refuge in a dreamy past, where, he believed, a united Slavic state (the Russian empire) built on Orthodox foundations had provided an ideological alternative to western individualistic liberalism." Solzhenitsyn also repeatedly denounced Tsar Alexis of Russia and Patriarch Nikon of Moscow for causing the Great Schism of 1666, which Solzhenitsyn said both divided and weakened the Russian Orthodox Church at a time when unity was desperately needed. Solzhenitsyn also attacked both the Tsar and the Patriarch for using excommunication, Siberian exile, imprisonment, torture, and even burning at the stake against the Old Believers, who rejected the liturgical changes which caused the Schism. Solzhenitsyn also argued that the Dechristianization of Russian culture, which he considered most responsible for the Bolshevik Revolution, began in 1666, became much worse during the Reign of Tsar Peter the Great, and accelerated into an epidemic during The Enlightenment, the Romantic era, and the Silver Age. Expanding upon this theme, Solzhenitsyn once declared, "Over a half century ago, while I was still a child, I recall hearing a number of old people offer the following explanation for the great disasters that had befallen Russia: 'Men have forgotten God; that's why all this has happened. Since then I have spent well-nigh 50 years working on the history of our revolution; in the process I have read hundreds of books, collected hundreds of personal testimonies, and have already contributed eight volumes of my own toward the effort of clearing away the rubble left by that upheaval. But if I were asked today to formulate as concisely as possible the main cause of the ruinous revolution that swallowed up some 60 million of our people, I could not put it more accurately than to repeat: 'Men have forgotten God; that's why all this has happened.'" In an interview with Joseph Pearce, however, Solzhenitsyn commented, "[The Old Believers were] treated amazingly unjustly because some very insignificant, trifling differences in ritual which were promoted with poor judgment and without much sound basis. Because of these small differences, they were persecuted in very many cruel ways, they were suppressed, they were exiled. From the perspective of historical justice, I sympathise with them and I am on their side, but this in no way ties in with what I have just said about the fact that religion in order to keep up with mankind must adapt its forms toward modern culture. In other words, do I agree with the Old Believers that religion should freeze and not move at all? Not at all!" When asked by Pearce for his opinions about the division within the Roman Catholic Church over the Second Vatican Council and the Mass of Paul VI, Solzhenitsyn replied, "A question peculiar to the Russian Orthodox Church is, should we continue to use Old Church Slavonic, or should we start to introduce more of the contemporary Russian language into the service? I understand the fears of both those in the Orthodox and in the Catholic Church, the wariness, the hesitation, and the fear that this is lowering the Church to the modern condition, the modern surroundings. I understand this, but alas, I fear that if religion does not allow itself to change, it will be impossible to return the world to religion because the world is incapable on its own of rising as high as the old demands of religion. Religion needs to come and meet it somewhat." Surprised to hear Solzhenitsyn, "so often perceived as an arch-traditionalist, apparently coming down on the side of the reformers", Pearce then asked Solzhenitsyn what he thought of the division caused within the Anglican Communion by the decision to ordain female priests. Solzhenitsyn replied, "Certainly there are many firm boundaries that should not be changed. When I speak of some sort of correlation between the cultural norms of the present, it is really only a small part of the whole thing." Solzhenitsyn then added, "Certainly, I do not believe that women priests is the way to go!" On Russia and the Jews In his 1974 essay "Repentance and Self-Limitation in the Life of Nations", Solzhenitsyn urged "Russian Gentiles" and Jews alike to take moral responsibility for the "renegades" from both communities who enthusiastically embraced atheism and Marxism–Leninism and participated in the Red Terror and many other acts of torture and mass murder following the October Revolution. Solzhenitsyn argued that both Russian Gentiles and Jews should be prepared to treat the atrocities committed by Jewish and Gentile Bolsheviks as though they were the acts of their own family members, before their consciences and before God. Solzhenitsyn said that if we deny all responsibility for the crimes of our national kin, "the very concept of a people loses all meaning." In a review of Solzhenitsyn's novel August 1914 in The New York Times on 13 November 1985, Jewish American historian Richard Pipes wrote: "Every culture has its own brand of anti-Semitism. In Solzhenitsyn's case, it's not racial. It has nothing to do with blood. He's certainly not a racist; the question is fundamentally religious and cultural. He bears some resemblance to Fyodor Dostoyevsky, who was a fervent Christian and patriot and a rabid anti-Semite. Solzhenitsyn is unquestionably in the grip of the Russian extreme right's view of the Revolution, which is that it was the doing of the Jews". Award-winning Jewish novelist and the Holocaust survivor Elie Wiesel disagreed and wrote that Solzhenitsyn was "too intelligent, too honest, too courageous, too great a writer" to be an anti-Semite. In his 1998 book Russia in Collapse, Solzhenitsyn criticized the Russian far-right's obsession with anti-Semitic and anti-Masonic conspiracy theories. In 2001, Solzhenitsyn published a two-volume work on the history of Russian-Jewish relations (Two Hundred Years Together 2001, 2002). The book triggered renewed accusations of anti-Semitism. In the book, he repeated his call for Russian Gentiles and Jews to share responsibility for everything that happened in the Soviet Union. He also downplayed the number of victims of an 1882 pogrom despite current evidence, and failed to mention the Beilis affair, a 1911 trial in Kiev where a Jew was accused of ritually murdering Christian children. He was also criticized for relying on outdated scholarship, ignoring current western scholarship, and for selectively quoting to strengthen his preconceptions, such as that the Soviet Union often treated Jews better than non-Jewish Russians. Similarities between Two Hundred Years Together and an anti-Semitic essay titled "Jews in the USSR and in the Future Russia", attributed to Solzhenitsyn, have led to the inference that he stands behind the anti-Semitic passages. Solzhenitsyn himself explained that the essay consists of manuscripts stolen from him by the KGB, and then carefully edited to appear anti-Semitic, before being published, 40 years before, without his consent.Cathy Young: Reply to Daniel J. Mahoney in Reason Magazine, August–September 2004. According to the historian Semyon Reznik, textological analyses have proven Solzhenitsyn's authorship. Criticism of communism Solzhenitsyn emphasized the significantly more oppressive character of the Soviet police state, in comparison to the Russian Empire of the House of Romanov. He asserted that Imperial Russia did not censor literature or the media to the extreme style of the Soviet Glavlit, that political prisoners typically were not forced into labor camps, and that the number of political prisoners and exiles was only one ten-thousandth of the numbers of prisoners and Exiles following the Bolshevik Revolution. He noted that the Tsar's secret police, the Okhrana, was only present in the three largest cities, and not at all in the Imperial Russian Army. Shortly before his return to Russia, Solzhenitsyn delivered a speech in Les Lucs-sur-Boulogne to commemorate the 200th anniversary of the Vendée Uprising. During his speech, Solzhenitsyn compared Lenin's Bolsheviks with the Jacobin Club during the French Revolution. He also compared the Vendean rebels with the Russian, Ukrainian, and Cossack peasants who rebelled against the Bolsheviks, saying that both were destroyed mercilessly by revolutionary despotism. He commented that, while the French Reign of Terror ended with the Thermidorian reaction and the toppling of the Jacobins and the execution of Maximilien Robespierre, its Soviet equivalent continued to accelerate until the Khrushchev thaw of the 1950s. According to Solzhenitsyn, Russians were not the ruling nation in the Soviet Union. He believed that all the traditional culture of all ethnic groups were equally oppressed in favor of atheism and Marxist–Leninism. Russian culture was even more repressed than any other culture in the Soviet Union, since the regime was more afraid of ethnic uprisings among Russian Christians than among any other ethnicity. Therefore, Solzhenitsyn argued, Russian nationalism and the Russian Orthodox Church should not be regarded as a threat by the West but rather as allies. Solzhenitsyn made a speaking tour after Francisco Franco's death, and "told liberals not to push too hard for changes because Spain had more freedoms now than the Soviet Union had ever known." As reported by The New York Times, he "blamed Communism for the death of 110 million Russians and derided those in Spain who complained of dictatorship." Solzhenitsyn recalled: "I had to explain to the people of Spain in the most concise possible terms what it meant to have been subjugated by an ideology as we in the Soviet Union had been, and give the Spanish to understand what a terrible fate they escaped in 1939", a reference to the Spanish Civil War between the Nationalists and the Republicans, which was not a common view at that time among American diplomats. For Winston Lord, a protégé of the then United States Secretary of State Henry Kissinger, Solzhenitsyn was "just about a fascist." According to Elisa Kriza, Solzhenitsyn held "benevolent views" on Franco's dictatorship and Francoist Spain because it was a Christian one, and his Christian worldview operated ideologically. In The Little Grain Managed to Land Between Two Millstones, Franco's Spain is "held up as a model of a proper Christian response to the evil of Bolshevism." According to Peter Brooke, Solzhenitsyn approached the position argued by Christian Dmitri Panin, with whom he had a fall out in exile, namely that evil "must be confronted by force, and the centralised, spiritually independent Roman Catholic Church is better placed to do it than Orthodoxy with its otherworldliness and tradition of subservience to the state." In "Rebuilding Russia", an essay first published in 1990 in Komsomolskaya Pravda, Solzhenitsyn urged the Soviet Union to grant independence to all the non-Slav republics, which he claimed were sapping the Russian nation and he called for the creation of a new Slavic state bringing together Russia, Ukraine, Belarus, and parts of Kazakhstan that he considered to be Russified. Regarding Ukraine he wrote “All the talk of a separate Ukrainian people existing since something like the ninth century and possessing its own non-Russian language is recently invented falsehood” and "we all sprang from precious Kiev". On post-Soviet Russia In some of his later political writings, such as Rebuilding Russia (1990) and Russia in Collapse (1998), Solzhenitsyn criticized the oligarchic excesses of the new Russian democracy, while opposing any nostalgia for Soviet Communism. He defended moderate and self-critical patriotism (as opposed to extreme nationalism). He also urged for local self-government similar to what he had seen in New England town meetings and in the cantons of Switzerland. He also expressed concern for the fate of the 25 million ethnic Russians in the "near abroad" of the former Soviet Union. In an interview with Joseph Pearce, Solzhenitsyn was asked whether he felt that the socioeconomic theories of E.F. Schumacher were, "the key to society rediscovering its sanity". He replied, "I do believe that it would be the key, but I don't think this will happen, because people succumb to fashion, and they suffer from inertia and it is hard to them to come round to a different point of view." Solzhenitsyn refused to accept Russia's highest honor, the Order of St. Andrew, in 1998. Solzhenitsyn later said: "In 1998, it was the country's low point, with people in misery; ... Yeltsin decreed I be honored the highest state order. I replied that I was unable to receive an award from a government that had led Russia into such dire straits." In a 2003 interview with Joseph Pearce, Solzhenitsyn said: "We are exiting from communism in a most unfortunate and awkward way. It would have been difficult to design a path out of communism worse than the one that has been followed." In a 2007 interview with Der Spiegel, Solzhenitsyn expressed disappointment that the "conflation of 'Soviet' and 'Russian'", against which he spoke so often in the 1970s, had not passed away in the West, in the ex-socialist countries, or in the former Soviet republics. He commented, "The elder political generation in communist countries is not ready for repentance, while the new generation is only too happy to voice grievances and level accusations, with present-day Moscow [as] a convenient target. They behave as if they heroically liberated themselves and lead a new life now, while Moscow has remained communist. Nevertheless, I dare [to] hope that this unhealthy phase will soon be over, that all the peoples who have lived through communism will understand that communism is to blame for the bitter pages of their history." In 2008, Solzhenitsyn praised Putin, saying Russia was rediscovering what it meant to be Russian. Solzhenitsyn also praised the Russian president Dmitry Medvedev as a "nice young man" who was capable of taking on the challenges Russia was facing. Criticism of the West Once in the United States, Solzhenitsyn sharply criticized the West. Solzhenitsyn criticized the Allies for not opening a new front against Nazi Germany in the west earlier in World War II. This resulted in Soviet domination and control of the nations of Eastern Europe. Solzhenitsyn claimed the Western democracies apparently cared little about how many died in the East, as long as they could end the war quickly and painlessly for themselves in the West. Delivering the commencement address at Harvard University in 1978, he called the United States "Dechristianized" and mired in boorish consumerism. The American people, he said, speaking in Russian through a translator, were also suffering from a "decline in courage" and a "lack of manliness." Few were willing to die for their ideals, he said. He also condemned the 1960s counterculture for forcing the United States federal government to accept a "hasty" capitulation in the Vietnam War. In a reference to the Communist governments in Southeast Asia's use of re-education camps, politicide, human rights abuses, and genocide following the Fall of Saigon, Solzhenitsyn said: "But members of the U.S. antiwar movement wound up being involved in the betrayal of Far Eastern nations, in a genocide and in the suffering today imposed on 30 million people there. Do those convinced pacifists hear the moans coming from there?" He also accused the Western news media of left-wing bias, of violating the privacy of celebrities, and of filling up the "immortal souls" of their readers with celebrity gossip and other "vain talk". He also said that the West erred in thinking that the whole world should embrace this as model. While faulting Soviet society for rejecting basic human rights and the rule of law, he also critiqued the West for being too legalistic: "A society which is based on the letter of the law and never reaches any higher is taking very scarce advantage of the high level of human possibilities." Solzhenitsyn also argued that the West erred in "denying [Russian culture's] autonomous character and therefore never understood it". Solzhenitsyn criticized the 2003 invasion of Iraq and accused the United States of the "occupation" of Kosovo, Afghanistan and Iraq. Solzhenitsyn was critical of NATO's eastward expansion towards Russia's borders. In 2006, Solzhenitsyn accused NATO of trying to bring Russia under its control; he claimed this was visible because of its "ideological support for the 'colour revolutions' and the paradoxical forcing of North Atlantic interests on Central Asia". In a 2006 interview with Der Spiegel he stated "This was especially painful in the case of Ukraine, a country whose closeness to Russia is defined by literally millions of family ties among our peoples, relatives living on different sides of the national border. At one fell stroke, these families could be torn apart by a new dividing line, the border of a military bloc." On the Holodomor Solzhenitsyn gave a speech to AFL–CIO in Washington, D.C., on 30 June 1975 in which he mentioned how the system created by the Bolsheviks in 1917 caused dozens of problems in the Soviet Union. He described how this system was responsible for the Holodomor: "It was a system which, in time of peace, artificially created a famine, causing 6 million people to die in the Ukraine in 1932 and 1933." Solzhenitsyn added, "they died on the very edge of Europe. And Europe didn't even notice it. The world didn't even notice it—6 million people!" Shortly before his death, Solzhenitsyn opined in an interview published 2 April 2008 in Izvestia that, while the famine in Ukraine was both artificial and caused by the state, it was no different from the Russian famine of 1921–1922. Solzhenitsyn expressed the belief that both famines were caused by systematic armed robbery of the harvests from both Russian and Ukrainian peasants by Bolshevik units, which were under orders from the Politburo to bring back food for the starving urban population centers while refusing for ideological reasons to permit any private sale of food supplies in the cities or to give any payment to the peasants in return for the food that was seized. Solzhenitsyn further alleged that the theory that the Holodomor was a genocide which only victimized the Ukrainian people was created decades later by believers in an anti-Russian form of extreme Ukrainian nationalism. Solzhenitsyn also cautioned that the ultranationalists' claims risked being accepted without question in the West due to widespread ignorance and misunderstanding there of both Russian and Ukrainian history. Legacy The Aleksandr Solzhenitsyn Center in Worcester, Massachusetts promotes the author and hosts the official English-language website dedicated to him. Television documentaries on Solzhenitsyn In October 1983, French literary journalist Bernard Pivot made an hour-long television interview with Solzhenitsyn at his rural home in Vermont, US. Solzhenitsyn discussed his writing, the evolution of his language and style, his family and his outlook on the future—and stated his wish to return to Russia in his lifetime, not just to see his books eventually printed there.Apostrophes: Alexandre Soljenitsyne répond à Bernard Pivot | Archive INA Ina Talk Shows Earlier the same year, Solzhenitsyn was interviewed on separate occasions by two British journalists, Bernard Levin and Malcolm Muggeridge. In 1998, Russian filmmaker Alexander Sokurov made a four-part television documentary, Besedy s Solzhenitsynym (The Dialogues with Solzhenitsyn). The documentary was shot in Solzhenitsyn's home depicting his everyday life and his reflections on Russian history and literature. In December 2009, the Russian channel Rossiya K broadcast the French television documentary L'Histoire Secrète de l'Archipel du Goulag (The Secret History of the Gulag Archipelago) made by Jean Crépu and Nicolas Miletitch and translated into Russian under the title Taynaya Istoriya "Arkhipelaga Gulag" (Тайная история "Архипелага ГУЛАГ"). The documentary covers events related to creation and publication of The Gulag Archipelago. Published works and speeches Also known as The Prisoner and the Camp Hooker or The Tenderfoot and the Tart. The beginning of a history of the birth of the USSR. Centers on the disastrous loss in the Battle of Tannenberg in August 1914, and the ineptitude of the military leadership. Other works, similarly titled, follow the story: see The Red Wheel (overall title). (3 vols.), not a memoir, but a history of the entire process of developing and administering a police state in the Soviet Union. . . ; separate publication of chapters on Vladimir Lenin, none of them published before this point, from The Red Wheel. The first of them was later incorporated into the 1984 edition of the expanded August 1914 (though it had been written at the same time as the original version of the novel) and the rest in November 1916 and March 1917. on Russian-Jewish relations since 1772, aroused ambiguous public response. See also Literature covering the Gulag system List of refugees Ivan Bunin Czesław Miłosz Đoàn Văn Toại Wei Jingsheng Yevgeny Zamyatin Notes References Sources Kriza, Elisa (2014) Alexander Solzhenitsyn: Cold War Icon, Gulag Author, Russian Nationalist? A Study of the Western Reception of his Literary Writings, Historical Interpretations, and Political Ideas. Stuttgart: Ibidem Press. Further reading Biographies Ostrovsky Alexander (2004). Солженицын: прощание с мифом (Solzhenitsyn: Farewell to the myth) – Moscow: «Yauza», Presscom. Reference works . ; Prof. Vittorio Strada, Dott. Julija Dobrovol'skaja. Anatoly Livry, « Soljénitsyne et la République régicide », Les Lettres et Les Arts, Cahiers suisses de critique littéraire et artistiques, Association de la revue Les Lettres et les Arts, Suisse, Vicques, 2011, pp. 70–72. http://anatoly-livry.e-monsite.com/medias/files/soljenitsine-livry-1.pdf . . . . . . . . External links The Nobel Prize in Literature 1970 Negative Analysis of Alexander Solzhenitsyn by the Stalin Society'' . Vermont Recluse Aleksandr Solzhenitsyn Der Spiegel interviews Alexander Solzhenitsyn: 'I Am Not Afraid of Death', 23 July 2007 As delivered text and video of Harvard Commencement Address at AmericanRhetoric.com The Solzhenitsyn Reader: New and Essential Writings, 1947–2005 1918 births 2008 deaths 20th-century male writers 20th-century non-fiction writers Russian writers of Ukrainian descent 20th-century Russian short story writers Burials at Donskoy Monastery Censorship in the Soviet Union Christian humanists Christian novelists Christian writers Converts to Eastern Orthodoxy from atheism or agnosticism Critics of atheism Eastern Orthodox philosophers Full Members of the Russian Academy of Sciences Gulag detainees Inmates of Lefortovo Prison Members of the Serbian Academy of Sciences and Arts Nobel laureates in Literature People denaturalized by the Soviet Union People from Cavendish, Vermont People from Kislovodsk People of the Cold War Prison writings Recipients of the Order of the Red Star Southern Federal University alumni Russian anti-communists Russian exiles 20th-century Russian historians Russian humanitarians Russian male novelists Russian male short story writers Russian monarchists Russian nationalists Russian Nobel laureates Russian Orthodox Christians from Russia Russian Orthodox Christians from the Soviet Union Russian people of Ukrainian descent Russian prisoners and detainees Sharashka inmates Soviet Army officers Soviet dissidents Soviet emigrants to Germany Soviet emigrants to Switzerland Soviet emigrants to the United States Soviet expellees Soviet male writers Soviet military personnel of World War II Soviet Nobel laureates Soviet historians Soviet novelists Soviet prisoners and detainees Soviet psychiatric abuse whistleblowers Soviet rehabilitations Soviet short story writers Soviet whistleblowers Stalinism-era scholars and writers State Prize of the Russian Federation laureates Stateless people Russian television talk show hosts Templeton Prize laureates World War II poets Male non-fiction writers Russian Christians Foreign members of the Serbian Academy of Sciences and Arts

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https://en.wikipedia.org/wiki/Aberdeen

Aberdeen

Aberdeen (; ; ; ) is a city in North East Scotland, and is the third most populous Scottish city. Aberdeen is one of Scotland's 32 local government council areas (as Aberdeen City), and has a population estimate of for the city of Aberdeen, and for the local council area making it the United Kingdom's 39th most populous built-up area. The city is northeast of Edinburgh and north of London, and is the northernmost major city in the United Kingdom. Aberdeen has a long, sandy coastline and features an oceanic climate, with cool summers and mild, rainy winters. During the mid-18th to mid-20th centuries, Aberdeen's buildings incorporated locally quarried grey granite, which may sparkle like silver because of its high mica content. Since the discovery of North Sea oil in 1969, Aberdeen has been known as the offshore oil capital of Europe. Based upon the discovery of prehistoric villages around the mouths of the rivers Dee and Don, the area around Aberdeen has been thought to have been settled for at least 6,000 years. Aberdeen received royal burgh status from David I of Scotland (1124–1153), which transformed the city economically. The traditional industries of fishing, paper-making, shipbuilding, and textiles have been overtaken by the oil industry and Aberdeen's seaport. Aberdeen Heliport is one of the busiest commercial heliports in the world, and the seaport is the largest in the north-east part of Scotland. A university town, the city is known for the University of Aberdeen, founded in 1495 as the fifth oldest university in the English-speaking world and located in Old Aberdeen. In 2012, HSBC named Aberdeen as a leading business hub and one of eight 'super cities' spearheading the UK's economy, marking it as the only city in Scotland so designated. In 2018, Aberdeen was found to be the best city in the UK to start a business in a study released by card payment firm Paymentsense. History The Aberdeen area has seen human settlement for at least 8,000 years. The city began as two separate burghs: Old Aberdeen at the mouth of the river Don; and New Aberdeen, a fishing and trading settlement, where the Denburn waterway entered the river Dee estuary. The earliest charter was granted by William the Lion in 1179 and confirmed the corporate rights granted by David I. In 1319, the Great Charter of Robert the Bruce transformed Aberdeen into a property-owning and financially independent community. Granted with it was the nearby Forest of Stocket, whose income formed the basis for the city's Common Good Fund which still benefits Aberdonians. During the Wars of Scottish Independence, Aberdeen was under English rule, so Robert the Bruce laid siege to Aberdeen Castle before destroying it in 1308, followed by executing the English garrison. The city was burned by Edward III of England in 1336, but was rebuilt and extended. The city was strongly fortified to prevent attacks by neighbouring lords, but the gates were removed by 1770. Aberdeen's medieval council registers survive from 1398 onwards and are exceptional for their quantity and continuity among surviving Scottish burgh records. The earliest eight volumes, from 1398 to 1511, have been included in the UNESCO UK Memory of the World Register, and have been edited in a digital edition. During the Wars of the Three Kingdoms of 1644 to 1647 the city was plundered by both sides. In 1644, it was taken and ransacked by Royalist troops after the Battle of Aberdeen and two years later it was stormed by a Royalist force under the command of the George Gordon, 2nd Marquis of Huntly. An outbreak of bubonic plague over 1687 and 1688 killed 8.5% of the population, adding to the economic and demographic damage caused by war. In the 18th century, a new Town Hall was built and the first social services appeared with the Aberdeen Infirmary at Woolmanhill in 1739 and the Aberdeen Lunatic Asylum in 1800. The expensive infrastructure works led to the city becoming bankrupt in 1817 during the Post-Napoleonic depression, an economic downturn immediately after the Napoleonic Wars; but the city's prosperity later recovered. The increasing economic importance of Aberdeen and the development of the shipbuilding and fishing industries led to the construction of the present harbour including Victoria Dock and the South Breakwater, and the extension of the North Pier. Gas street lighting arrived in 1824 and an enhanced water supply appeared in 1830 when water was pumped from the Dee to a reservoir in Union Place. An underground sewer system replaced open sewers in 1865. The city was incorporated in 1891. Although Old Aberdeen has a separate history and still holds its ancient charter, it was annexed by the City of Aberdeen in 1891. Over the course of the Second World War Aberdeen was attacked 32 times by the German Luftwaffe. One of the most devastating attacks was on Wednesday 21 April 1943 when 29 Luftwaffe Dornier 217s flying from Stavanger, Norway attacked the city between the hours of 22:17 and 23:04. A total of 98 civilians and 27 servicemen were killed, along with 12,000 houses damaged, after a mixture of 127 Incendiary, High Explosive and Cluster bombs were dropped on the city in one night. Two books written in 2018 and 2022 using bombing records held in London identified that unexploded bombs from the 1943 raid were found in the 1950s and 1980s making the bombs dropped 129 in total. Damage from the raid can still be seen in some parts of Aberdeen. Toponymy The name given to Aberdeen translates as 'mouth of the river Don', and is recorded as Aberdon in 1172 and Aberden in . The first element of the name is the Pictish word 'river mouth'. The second element is from the Celtic river goddess Devona. Aberdeen is usually described as within the historical Pictish territory, and became Gaelic-speaking at some time in the medieval period. Old Aberdeen is the approximate location of Aberdon, the first settlement of Aberdeen; this literally means "the mouth of the Don". The Celtic word means "river mouth", as in modern Welsh (Aberystwyth, Aberdare, Aberbeeg etc.). The Scottish Gaelic name is (variation: ; presumably being a loan from the earlier Pictish; the Gaelic term is ), and in Latin, the Romans referred to the river as . Medieval (or Ecclesiastical) Latin has it as . Governance Aberdeen is locally governed by Aberdeen City Council, which comprises forty-five councillors who represent the city's wards and is headed by the Lord Provost. The current Lord Provost is David Cameron. From May 2003 until May 2007 the council was run by a Liberal Democrat and Conservative Party coalition. Following the May 2007 local elections, the Liberal Democrats formed a new coalition with the Scottish National Party. After a later SNP by-election gain from the Conservatives, this coalition held 28 of the 43 seats. Following the election of 4 May 2017, the council was controlled by a coalition of Scottish Labour, Scottish Conservatives and independent councillors; the Labour councillors were subsequently suspended by Scottish Labour Party leader, Kezia Dugdale. Following Conservative losses in the May 2022 local elections, the Liberal Democrats and SNP agreed to work in partnership, agreed on a policy programme and formed the Council's administration. Aberdeen is represented in the Parliament of the United Kingdom by three constituencies: Aberdeen North and Aberdeen South which are wholly within the Aberdeen City council area, and Gordon, which includes a large area of the Aberdeenshire Council area. In the Scottish Parliament, the city is represented by three constituencies with different boundaries: Aberdeen Central and Aberdeen Donside are wholly within the Aberdeen City council area. Aberdeen South and North Kincardine includes the North Kincardine ward of Aberdeenshire Council. A further seven MSPs are elected as part of the North East Scotland electoral region. In the European Parliament the city was represented by six MEPs as part of the all-inclusive Scotland constituency. Heraldry The arms and banner of the city show three silver towers on red. This motif dates from at least the time of Robert the Bruce and represents the buildings that stood on the three hills of medieval Aberdeen: Aberdeen Castle on Castle Hill (today's Castlegate); the city gate on Port Hill; and a church on St Catherine's Hill (now levelled). "Bon Accord" is the motto of the city and is French for "Good Agreement". Legend tells that its use dates from a password used by Robert the Bruce during the 14th century Wars of Scottish Independence, when he and his men laid siege to the English-held Aberdeen Castle before destroying it in 1308. It is still widely present in the city, throughout street names, business names and the city's Bon Accord shopping mall. The shield in the coat of arms is supported by two leopards. A local magazine is called the "Leopard" and, when Union Bridge was widened in the 20th century, small statues of the creature in a sitting position were cast and placed on top of the railing posts (known locally as Kelly's Cats). The city's toast is "Happy to meet, sorry to part, happy to meet again"; this has been commonly misinterpreted as the translation of Bon Accord. Geography Being situated between two river mouths, the city has little natural exposure of bedrock. The small amount of geophysics done, and occasional building-related exposures, combined with small exposures in the banks of the River Don, suggest that it is actually sited on an inlier of Devonian "Old Red" sandstones and silts. The outskirts of the city spread beyond the (inferred) limits of the outlier onto the surrounding metamorphic/ igneous complexes formed during the Dalradian period (approximately 480–600 million years ago) with sporadic areas of igneous Diorite granites to be found, such as that at the Rubislaw quarry which was used to build much of the Victorian parts of the city. The city extends to , and includes the former burghs of Old Aberdeen, New Aberdeen, Woodside and the Royal Burgh of Torry to the south of River Dee. In this gave the city a population density of . The city is built on many hills, with the original beginnings of the city growing from Castle Hill, St. Catherine's Hill and Windmill Hill. When compared to mainland Europe, Aberdeen is further north than almost all of Denmark and plenty of southern Sweden, being just south of Gothenburg in terms of latitude. Climate Aberdeen features an oceanic climate (Köppen Cfb), with far milder winter temperatures than one might expect for its northern location, although statistically, it is the coldest city in the UK. During the winter, especially throughout December, the length of the day is very short, averaging 6 hours and 41 minutes between sunrise and sunset at the winter solstice. As winter progresses, the length of the day grows fairly quickly, to 8 hours and 20 minutes by the end of January. Around summer solstice, the days will be around 18 hours long, having 17 hours and 55 minutes between sunrise and sunset. During this time of the year marginal nautical twilight lasts the entire night. Temperatures at this time of year hover around during the day in most of the urban area, though nearer directly on the coast, and around in the westernmost suburbs. Two weather stations collect climate data for the area, Aberdeen/Dyce Airport, and Craibstone. Both are about to the northwest of the city centre, and given that they are in close proximity to each other, exhibit very similar climatic regimes. Dyce tends to have marginally warmer daytime temperatures year-round owing to its slightly lower elevation, though it is more susceptible to harsh frosts. The coldest temperature to occur in recent years was during December 2010, while the following winter, Dyce set a new February high-temperature station record on 28 February 2012 of , and a new March high temperature record of on 25 March 2012. The average temperature of the sea ranges from in March to in August. Demography The Aberdeen locality population estimate is . For the wider settlement of Aberdeen including Cove Bay and Dyce, the population estimate is . For Aberdeen City council area, the population estimate is (). In 1396, the population was about 3,000. By 1801, it had become 26,992, then 153,503 in 1901, and finally 182,467 in 1941. The 2011 census showed that there are fewer young people in Aberdeen, with 16.4% under 16, as opposed to the national average of 19.2%. According to the 2011 census Aberdeen is 91.9% white, ethnically, 24.7% were born outside Scotland, higher than the national average of 16%. Of this population, 7.6% were born in other parts of the UK. 8.2% of Aberdonians stated to be from an ethnic minority (non-white) in the 2011 census, with 9,519 (4.3%) being Asian, with 3,385 (1.5%) coming from India and 2,187 (1.0%) being Chinese. The city has around 5,610 (2.6%) residents of African or Caribbean origin, which is a higher percentage than both Glasgow and Edinburgh. In the household, there were 97,013 individual dwellings recorded in the city, of which 61% were privately owned, 9% privately rented and 23% rented from the council. The most popular type of dwellings are apartments which comprise 49% of residences followed by semi-detached at just below 22%. The median income of a household in the city is £16,813 (the mean income is £20,292) (2005) which places approximately 18% households in the city below the poverty line (defined as 60% of the mean income). Conversely, an Aberdeen postcode has the second highest number of millionaires of any postcode in the UK. Ethnicity Religion Christianity is the main religion practised in the city. Aberdeen's largest denominations are the Church of Scotland (through the Presbytery of Aberdeen) and the Roman Catholic Church, both with numerous churches across the city, with the Scottish Episcopal Church having the third-largest number. The most recent census in 2001 showed that Aberdeen has the highest proportion of non-religious residents of any city in Scotland, with nearly 43% of citizens claiming to have no religion and several former churches in the city have been converted into bars and restaurants. In the Middle Ages, the Kirk of St Nicholas was the only burgh kirk and one of Scotland's largest parish churches. Like a number of other Scottish kirks, it was subdivided after the Reformation, in this case into the East and West churches. At that time, the city also was home to houses of the Carmelites (Whitefriars) and Franciscans (Greyfriars). The latter of these survives in modified form as the chapel of Marischal College. St Machar's Cathedral was built twenty years after David I (1124–1153) transferred the pre-Reformation diocese from Mortlach in Banffshire to Old Aberdeen in 1137. With the exception of the episcopate of William Elphinstone (1484–1511), building progressed slowly. Gavin Dunbar, who followed him in 1518, completed the structure by adding the two western spires and the southern transept. It is now a congregation of the Church of Scotland. Aberdeen has two other cathedrals: St. Mary's Cathedral is a Roman Catholic cathedral in Gothic style, erected in 1859. In addition, St. Andrew's Cathedral serves the Scottish Episcopal Church. It was constructed in 1817 as Archibald Simpson's first commission and contains a memorial to the consecration of the first bishop of the Episcopal Church in the United States of America, which took place nearby. In 1804, St Peter's Church, the first permanent Roman Catholic church in the city after the Reformation was built. Numerous other Protestant denominations have a presence in Aberdeen. The Salvation Army citadel on the Castlegate dominates the view of east end of Union Street. In addition, there is a Unitarian church, established in 1833 and located in Skene Terrace. Christadelphians have been present in Aberdeen since at least 1844. Over the years, they have rented space to meet at a number of locations and currently meet in the Inchgarth Community Centre in Garthdee. There is also a Quaker meetinghouse on Crown Street, the only purpose built Friends meeting house in Scotland that is still in use today. In addition, there are a number of Baptist congregations in the city, and Evangelical congregations have been appearing in significant numbers since the late 2000s. The city also has two meeting houses of the Church of Jesus Christ of Latter-day Saints (LDS Church). There are also four mosques in Aberdeen which serve the Islamic community in the city. There is an Orthodox Jewish Synagogue established in 1945. There is also a Thai Buddhist temple located in the Hazelhead area of the city. There are no formal Hindu buildings, although there is a fortnightly Hindu religious gathering on the first and third Sunday afternoons at Queens Cross Parish church hall. The University of Aberdeen has a small Baháʼí society. Economy Traditionally, Aberdeen was home to fishing, textile mills, shipbuilding and paper-making. These industries have been largely replaced. High technology developments in the electronics design and development industry, research in agriculture and fishing and the oil industry, which have been largely responsible for Aberdeen's economic growth, are now major parts of Aberdeen's economy. Until the 1970s, most of Aberdeen's leading industries dated from the 18th century; mainly these were textiles, foundry work, shipbuilding and paper-making, the oldest industry in the city, with paper having been first made there in 1694. Paper-making has reduced in importance since the closures of Donside Paper Mill in 2001 and the Davidson Mill in 2005 leaving the Stoneywood Paper Mill with a workforce of approximately 500. Textile production ended in 2004 when Richards of Aberdeen closed. Grey granite was quarried at Rubislaw quarry for more than 300 years, and used for paving setts, kerb and building stones, and monumental and other ornamental pieces. Aberdeen granite was used to build the terraces of the Houses of Parliament and Waterloo Bridge in London. Quarrying finally ceased in 1971. The current owners have begun pumping 40 years of rainwater from the quarry with the aim of developing a heritage centre on the site. In-shore fishing was once the predominant industry but was surpassed by deep-sea fisheries, which derived a great impetus from improved technologies throughout the 20th century. Catches have fallen because of overfishing and the use of the harbour by oil support vessels, and so although still an important fishing port it is now eclipsed by the more northerly ports of Peterhead and Fraserburgh. The Fisheries Research Services are headquartered in Aberdeen, and there is a marine research laboratory there. Aberdeen is well regarded for the agricultural and soil research carried out at The James Hutton Institute (formerly the Macaulay Land Use Research Institute), which has close links to the city's two universities. The Rowett Research Institute is a world-renowned research centre for studies into food and nutrition located in Aberdeen. It has produced three Nobel laureates and there is a high concentration of life scientists working in the city. As oil reserves in the North Sea decrease there is an effort to rebrand Aberdeen as "Energy Capital of Europe" rather than "Oil Capital of Europe", and there is interest in the development of new energy sources, and technology transfer from oil into renewable energy and other industries is underway. The "Energetica" initiative led by Scottish Enterprise has been designed to accelerate this process. Aberdeen has become a major world centre for undersea petroleum technology. North Sea oil and gas Aberdeen had been a major maritime centre throughout the 19th century, when a group of local entrepreneurs launched the first steam-powered trawler. The steam trawling industry expanded and by 1933 Aberdeen was Scotland's top fishing port, employing nearly 3,000 men with 300 vessels sailing from its harbour. By the time oil was coming on stream, much of the trawling fleet had relocated to Peterhead. Geologists had speculated about the existence of oil and gas in the North Sea since the middle of the 20th century, but tapping its deep and inhospitable waters was another story. With the Middle Eastern oil sheiks becoming more aware of the political and economic power of their oil reserves and government threats of rationing, the industry began to consider the North Sea as a viable source of oil. Exploration commenced in the 1960s and the first major find in the British sector was in November 1970 in the Forties field, east of Aberdeen. By late 1975, after years of intense construction, the necessary infrastructure was in place. Oil flowed through the Forties pipeline system directly to the refinery at far-away Grangemouth. Business In 2011, the Centre for Cities named Aberdeen as the best placed city for growth in Britain, as the country looked to emerge from the recent economic downturn. With energy still providing the backbone of the local economy, recent years have seen very large new investment in the North Sea owing to rising oil prices and favourable government tax incentives. This has led to several oil majors and independents building new global offices in the city. Five of Scotland's top ten businesses are based in Aberdeen with a collective turnover of £14 billion, yielding a profit in excess of £2.4 billion. Alongside this 29 of Scotland's top 100 businesses are located in Aberdeen with an employment rate of 77.9%, making it the second highest UK city for employment. Figures released in 2016 ranked Aberdeen as having the second highest number of patents processed per person in the UK. Shopping The traditional shopping streets are Union Street and George Street, now complemented by shopping centres, including the Bon Accord Centre and the Trinity Shopping Centre. A £190 million retail development, Union Square, reached completion in late September/early October 2009. Major retail parks away from the city centre include the Berryden Retail Park, the Kittybrewster Retail Park and the Beach Boulevard Retail Park. Aberdeen Market has been rebuilt twice, but closed in 2020. In March 2004, Aberdeen was awarded Fairtrade City status by the Fairtrade Foundation. Landmarks Aberdeen's architecture is known for its principal use during the Victorian era of granite, which has led to its local nickname of the Granite City. Amongst the notable buildings in the city's main street, Union Street, are the Town and County Bank, the Music Hall, the Trinity Hall of the incorporated trades (originating between 1398 and 1527, although completely rebuilt in the 1860s), now a shopping mall; the former office of the Northern Assurance Company, and the National Bank of Scotland. In Castle Street, a continuation eastwards of Union Street, is the new Aberdeen Town House, a very prominent landmark in Aberdeen, built between 1868 and 1873 to a design by Peddie and Kinnear. Alexander Marshall Mackenzie's extension to Marischal College on Broad Street, opened by King Edward VII in 1906, created the second largest granite building in the world (after the Escorial, Madrid). In addition to the many fine landmark buildings, Aberdeen has many prominent public statues, three of the most notable being William Wallace at the junction between Union Terrace and Rosemount Viaduct, Robert Burns on Union Terrace above Union Terrace Gardens, and Robert the Bruce holding aloft the charter he issued to the city in 1319 on Broad Street, outside Marischal College. Parks, gardens and open spaces Aberdeen has long been famous for its 45 parks and gardens, and citywide floral displays which include two million roses, eleven million daffodils and three million crocuses. The city has won the Royal Horticultural Society's Britain in Bloom 'Best City' award ten times, the overall Scotland in Bloom competition twenty times and the large city category every year since 1968. However, despite recent spurious reports, Aberdeen has never been banned from the Britain in Bloom competition. The city won the 2006 Scotland in Bloom "Best City" award along with the International Cities in Bloom award. The suburb of Dyce also won the Small Towns award. Duthie Park opened in 1899 on the north bank of the River Dee. It was named after and given to the city by Miss Elizabeth Crombie Duthie of Ruthrieston in 1881. Hazlehead Park, is large and forested, and located on the outskirts of the city. Johnston Gardens is a small park of one hectare in the west end of the city. In 2002, the garden was named the best garden in the British Islands. Seaton Park, formerly the grounds of a private house, is on the edge of the grounds of St Machar's Cathedral and was acquired for the city in 1947. Theatres and concert halls Aberdeen has hosted several theatres throughout its history, some of which have subsequently been converted or destroyed. The most famous include: His Majesty's Theatre (HMT), on Rosemount Viaduct The Tivoli, on Guild Street Capitol Theatre, on Union Street Aberdeen Arts Centre, on King Street The Palace Theatre, on Bridge Street The main concert hall is the Music Hall on Union Street, built in 1822. Transport Aberdeen Airport (ABZ), in Dyce in the north of the city, serves domestic and international destinations including France, the Netherlands, Spain, Ireland and Scandinavian countries. The heliport which serves the oil industry and rescue services is one of the world's busiest commercial heliports. Aberdeen has two railway stations. Aberdeen railway station has frequent direct trains operated by ScotRail to major cities Edinburgh, Glasgow and Inverness. London North Eastern Railway and the Caledonian Sleeper operate direct trains to London. The UK's longest direct rail journey runs from Aberdeen to Penzance. It is operated by CrossCountry, leaving Aberdeen at 08:20 and taking 13 hours and 23 minutes. Today, all railway services to the south run via Dundee. The faster mainline from Aberdeen to Perth via Forfar and Strathmore closed in 1967 as a result of the Beeching cuts, and the faster main line from Perth to Edinburgh via Glenfarg also subsequently closed in 1970. The other railway station, Dyce railway station in Dyce to the north of the city centre, is on the Aberdeen–Inverness line. There are six major roads in and out of the city. The A90 is the main arterial route into the city from the north and south, linking Aberdeen to Edinburgh (via the M90), Dundee, Brechin and Perth in the south and Ellon, Peterhead and Fraserburgh in the north. The A96 links Elgin and Inverness and the northwest. The A93 is the main route to the west, heading towards Royal Deeside and the Cairngorms. After Braemar, it turns south, providing an alternative tourist route to Perth. The A944 also heads west, through Westhill and on to Alford. The A92 was the original southerly road to Aberdeen prior to the building of the A90, and is now used as a tourist route, connecting the towns of Montrose and Arbroath and on the east coast. The A947 exits the city at Dyce and goes on to Newmachar, Oldmeldrum and Turriff finally ending at Banff and Macduff. In 2019, the Aberdeen Western Peripheral Route bypass was completed. Aberdeen Harbour is important as the largest in the north of Scotland and serves the ferry route to Orkney and Shetland. Established in 1136, the harbour has been referred to as the oldest business in Britain. FirstGroup operates the city buses under the name First Aberdeen, as the successor of Grampian Regional Transport (GRT) and Aberdeen Corporation Tramways. Aberdeen is the global headquarters of FirstGroup plc, having grown from the GRT Group. First is still based at the former Aberdeen Tramways depot on King Street, which has now been redeveloped into a new headquarters and bus depot. National Express operate express coach services to London twice daily. The 590 service, operated by Bruce's Coaches of Salsburgh operates in the morning and runs through the day, calling at Dundee, Perth, Glasgow, Hamilton, Carlisle, Milton Keynes, Golders Green and Victoria Coach Station, whilst the 592 (operated by Parks of Hamilton) leaves in the evening and travels overnight, calling at Dundee, Glasgow, Hamilton, Carlisle, Heathrow Airport and Victoria Coach Station. Aberdeen is connected to the UK National Cycle Network, and has a track to the south connecting to cities such as Dundee and Edinburgh and one to the north that forks about from the city into two different tracks heading to Inverness and Fraserburgh respectively. Two popular footpaths along old railway lines are the Deeside Way to Banchory (which will eventually connect to Ballater) and the Formartine and Buchan Way to Ellon, both used by a mixture of cyclists, walkers and occasionally horses. The Dee Estuary, Aberdeen's harbour, has continually been improved. Starting out as a fishing port, moving onto steam trawlers, the oil industry, it is now a major port of departure for the Baltic and Scandinavia. Education Universities and colleges Aberdeen has two universities, the ancient University of Aberdeen, and Robert Gordon University, a modern university often referred to as RGU. Aberdeen's student rate of 11.5% is higher than the national average of 7%. The University of Aberdeen began as King's College, Aberdeen, which was founded in 1495 by William Elphinstone (1431–1514), Bishop of Aberdeen and Chancellor of Scotland. Marischal College, a separate institution, was founded in "New" Aberdeen by George Keith, fifth Earl Marischal of Scotland in 1593. These institutions were merged by order of Parliament in 1860 to form the University of Aberdeen. The university is the fifth oldest in the English-speaking world and offers degrees in a full range of disciplines. Its main campus is in Old Aberdeen in the north of the city and it currently has approximately 14,000 students. The university's debating society is the oldest in Scotland, founded in 1848 as the King's College Debating Society. Today, Aberdeen is consistently ranked among the top 200 universities in the world and is ranked within the top 20 universities in the United Kingdom. Aberdeen was also named the 2019 Scottish University of the Year by The Times and Sunday Times Good University Guide. In early 2022, Aberdeen opened the Science Teaching Hub. Robert Gordon's College (originally Robert Gordon's Hospital) was founded in 1750 by the merchant Robert Gordon, grandson of the map maker Robert Gordon of Straloch, and was further endowed in 1816 by Alexander Simpson of Collyhill. Originally devoted to the instruction and maintenance of the sons of poor burgesses of guild and trade in the city, it was reorganised in 1881 as a day and night school for secondary and technical education. In 1903, the vocational education component of the college was designated a Central Institution and was renamed as the Robert Gordon Institute of Technology in 1965. In 1992, university status was awarded and it became Robert Gordon University. The university has expanded and developed significantly in recent years, and was named Best Modern University in the UK for 2012 by The Sunday Times. It was previously The Sunday Times Scottish University of the Year for 2011, primarily because of its record on graduate employment. The citation for the 2011 award read: "With a graduate unemployment rate that is lower than the most famous universities, including Oxford and Cambridge, plus a flourishing reputation for research, high student satisfaction rates and ambitious plans for its picturesque campus, the Robert Gordon University is The Sunday Times Scottish University of the Year". Aberdeen is also home to two artistic schools: Gray's School of Art, founded in 1886, which is one of the oldest established colleges of art in the UK. Scott Sutherland School of Architecture and Built Environment, was one of the first architectural schools to have its training courses recognised by the Royal Institute of British Architects. Both are now part of Robert Gordon University and are based at its Garthdee campus. North East Scotland College has several campuses in the city and offers a wide variety of part-time and full-time courses leading to several different qualifications in science. The Scottish Agricultural College is based just outside Aberdeen, on the Craibstone Estate. This is situated beside the roundabout for Aberdeen Airport on the A96. The college provides three services—Learning, Research and Consultancy. The college features many land-based courses such as Agriculture, Countryside Management, Sustainable Environmental Management and Rural Business Management. There are a variety of courses from diplomas to master's degrees. The Marine Laboratory Aberdeen, which specialises in fisheries, Macaulay Land Use Research Institute (soil science), and the Rowett Research Institute (animal nutrition) are some other higher education institutions. The Aberdeen College of Performing Arts also provides full-time Drama and Musical Theatre training at Further Education level. Schools There are currently 15 secondary schools and 54 primary schools which are run by the city council. There are a number of private schools in Aberdeen: Robert Gordon's College, Albyn School for Girls (co-educational as of October 2022), St Margaret's School for Girls, the International School of Aberdeen and a Waldorf/Steiner School. State primary schools in Aberdeen include Airyhall Primary School, Ashley Road Primary School, Balgownie Primary School, Bramble Brae Primary School, Broomhill Primary School, Cornhill Primary School (the city's largest), Culter Primary School, Cults Primary School, Danestone Primary School, Fernielea Primary school, Ferryhill Primary School, Gilcomstoun Primary School, Glashieburn Primary School, Greenbrae School, Hamilton School, Kaimhill Primary School, Kingsford Primary School, Kittybrewster Primary School, Middleton Park Primary School, Mile End School, Muirfield Primary School, Skene Square Primary School, and St. Joseph's Primary School. State secondary schools in Aberdeen include Aberdeen Grammar School, Albyn School, Bridge of Don Academy, Bucksburn Academy, Cults Academy, Dyce Academy, Harlaw Academy, Hazlehead Academy, Lochside Academy, Northfield Academy, Oldmachar Academy, Robert Gordon's College, St Machar Academy, St Margaret's School for Girls, and The International School Aberdeen. Independent primary schools in Aberdeen include Albyn School, Robert Gordon's College, St Margaret's School for Girls, and the International School of Aberdeen. Culture The city has a wide range of cultural activities, amenities, and museums, and is regularly visited by Scotland's National Arts Companies. It was awarded the Nicholson Trophy for the best-kept town at the Britain in Bloom contest in 1975. Museums and galleries The Aberdeen Art Gallery houses a collection of Impressionist, Victorian, Scottish and 20th-century British paintings as well as collections of silver and glass. It also includes The Alexander Macdonald Bequest, a collection of late 19th-century works donated by the museum's first benefactor and a constantly changing collection of contemporary work and regular visiting exhibitions. The Aberdeen Art Gallery reopened in 2019 after a four-year refurbishment costing £34.6m. The Aberdeen Maritime Museum, located in Shiprow, tells the story of Aberdeen's links with the sea from the days of sail and clipper ships to the latest oil and gas exploration technology. It includes an model of the Murchison oil production platform and a 19th-century assembly taken from Rattray Head lighthouse Provost Ross' House is the second oldest dwelling house in the city. It was built in 1593 and became the residence of Provost John Ross of Arnage in 1702. The house retains some original medieval features, including a kitchen, fireplaces and beam-and-board ceilings. The Gordon Highlanders Museum tells the story of one of Scotland's best known regiments. Provost Skene's House on Flourmill Lane dates from 1545 and is the oldest surviving townhouse in the city. It reopened in October 2021 after significant refurbishment costing £3.8m. One of the new exhibitions is a Hall of Heroes featuring 100 Aberdonians who have made a significant contribution to the city. The Tollbooth Museum on the Castlegate (currently closed to visitors) is a former jail, which first opened as a public museum in 1995. The Aberdeen Treasure Hub is a storage facility for Aberdeen Museums and Galleries containing over 100,000 items. The store is open for infrequent tours, for example as part of Doors Open Day. Marischal Museum holds the principal collections of the University of Aberdeen, comprising some 80,000 items in the areas of fine art, Scottish history and archaeology, and European, Mediterranean and Near Eastern archaeology. The permanent displays and reference collections are augmented by regular temporary exhibitions, and since its closure to the public it now has a virtual online presence It closed to the public in 2008. The King's Museum acts as the main museum of the university now. Festivals and performing arts Aberdeen is home to a number of events and festivals including the Aberdeen International Youth Festival (the world's largest arts festival for young performers), Aberdeen Jazz Festival, Aberdeen Alternative Festival, Rootin' Aboot (a folk and roots music event), Triptych, the University of Aberdeen's annual May Fest (formerly the Word festival) and DanceLive, Scotland's only festival of contemporary dance, produced by the city's Citymoves dance organisation. The Aberdeen Student Show, performed annually without interruption since 1921, under the auspices of the Aberdeen Students' Charities Campaign, is the longest-running of its kind in the United Kingdom. It is written, produced and performed by students and graduates of Aberdeen's universities and higher education institutions. Since 1929—other than on a handful of occasions—it has been staged at His Majesty's Theatre. National festivals which visited Aberdeen in 2012 included the British Science Festival in September, hosted by the University of Aberdeen but with events also taking place at Robert Gordon University and at other venues across the city. In February 2012 the University of Aberdeen also hosted the Inter Varsity Folk Dance Festival, the longest-running folk festival in the United Kingdom. Aberdeen is home to Spectra, an annual light festival hosted in different locations across the city. Aberdeen is home to Nuart, a festival showcasing street art around the city. The festival has run since 2017. Music and film Music venues include Aberdeen Music Hall and the P&J Live. Dialect The local dialect of Lowland Scots is often known as Doric and is spoken not just in the city, but across the northeast of Scotland. It differs somewhat from other Scots dialects: most noticeable are the pronunciation "f" for what is normally written "wh" and "ee" for what in standard English would usually be written "oo" (Scots "ui"). Every year the annual Doric Festival takes place in Aberdeenshire to celebrate the history of the north-east's language. Media Aberdeen is home to Scotland's oldest newspaper the Press and Journal, a local and regional newspaper first published in 1747. The Press and Journal and its sister paper the tabloid Evening Express are printed six days a week by Aberdeen Journals. There was one free newspaper, the Aberdeen Citizen. BBC Scotland has a network studio production base in the city's Beechgrove area, and BBC Aberdeen produces The Beechgrove Potting Shed for radio while Tern Television produces The Beechgrove Garden. The city is also home to STV North (formerly Grampian Television), which produces the regional news programmes such as STV News at Six, as well as local commercials. The station, based at Craigshaw Business Park in Tullos, was based at larger studios in Queens Cross from September 1961 until June 2003. There are three commercial radio stations operating in the city, Northsound 1, Greatest Hits Radio North East Scotland, and independent station Original 106. Other radio stations include NECR FM (North-East Community Radio FM) DAB station, and shmu FM managed by Station House Media Unit which supports community members to run Aberdeen's full-time community radio station, broadcasting on 99.8 MHz FM. Food The Aberdeen region has given its name to a number of dishes, including the Aberdeen buttery (also known as "rowie") and Aberdeen Sausage. In 2015, a study was published in The Scotsman which analysed the presence of branded fast food outlets in Scotland. Of the ten towns and cities analysed, Aberdeen was found to have the lowest per capita concentration, with just 0.12 stores per 1,000 inhabitants. Sport Football The first ever recorded game of football, was outlined by teacher David Wedderburn in his book "Vocabula" written in 1633, during his time teaching at Aberdeen Grammar School. There are two Aberdeen-based football clubs in the SPFL, the senior branch of Scottish football. Aberdeen F.C. (The Dons) play in the Scottish Premiership at Pittodrie Stadium. The club won the European Cup Winners Cup and the European Super Cup in 1983, the Scottish Premier League Championship four times (1955, 1980, 1984 and 1985), and the Scottish Cup seven times (1947, 1970, 1982, 1983, 1984, 1986 and 1990). Under the management of Alex Ferguson, Aberdeen was a major force in British football during the 1980s. After 8 seasons in charge, the most recent of Managers Derek McInnes, was relieved of his duties, the club's failure to achieve anything more than 1 trophy in 24 competitions during his tenure and a recent run of games which saw 1 goal in ten matches ultimately proved costly for the Manager and his Assistant Tony Docherty. Under the management of McInnes the team won the 2014 Scottish League Cup and followed it up with a second-place league finish for the first time in more than 20 years in the following season. But it was over the last few seasons that results stagnated and McInnes was replaced by former Aberdeen and Newcastle player Stephen Glass. The other senior team is Cove Rangers of League One, who play at Balmoral Stadium in the suburb of Cove Bay. Cove won the Highland Football League championship in 2001, 2008, 2009, 2013 and 2019, winning the League Two play-offs in 2019 and earning promotion. At the point at which the 2019/20 League Two season was curtailed due to the COVID-19 pandemic, Cove was sitting top of the League Two table and were promoted as Champions. Local junior teams include Banks O' Dee F.C., Culter F.C., F.C. Stoneywood, Glentanar F.C., Sunnybank and Hermes F.C. Rugby Union Aberdeen hosted Caledonia Reds, a Scottish rugby team, before they merged with the Glasgow Warriors in 1998. The city is also home to the Scottish Premiership Division One rugby club Aberdeen GSFP RFC who play at Rubislaw Playing Fields, and Aberdeenshire RFC which was founded in 1875 and runs Junior, Senior Men's, Senior Ladies and Touch sections from the Woodside Sports Complex and also Aberdeen Wanderers RFC. In 2005 the President of the SRU said it was hoped eventually to establish a professional team in Aberdeen. In November 2008 the city hosted a rugby international at Pittodrie between Scotland and Canada, with Scotland winning 41–0. In November 2010 the city once again hosted a rugby international at Pittodrie between Scotland and Samoa, with Scotland winning 19–16. Rugby League Aberdeen Warriors rugby league team play in the Rugby League Conference Division One. The Warriors also run Under 15's and 17's teams. Aberdeen Grammar School won the Saltire Schools Cup in 2011. Golf The Royal Aberdeen Golf Club, founded in 1780 is the sixth oldest golf club in the world, and hosted the Senior British Open in 2005, and the amateur team event the Walker Cup in 2011. Royal Aberdeen also hosted the Scottish Open in 2014, won by Justin Rose. The club has a second course, and there are public golf courses at Auchmill, Balnagask, Hazlehead and King's Links. There are new courses planned for the area, including world-class facilities with major financial backing, the city and shire are set to become important in golf tourism. In Summer 2012, Donald Trump opened a new state of the art golf course at Menie, just north of the city, as the Trump International Golf Links, Scotland. Swimming The City of Aberdeen Swim Team (COAST) was based in Northfield swimming pool, but since the opening of the Aberdeen Aquatics Centre in 2014, it is now based there, as it has a 50 m pool as opposed to the 25 m pool at Northfield. It has been in operation since 1996. The team comprises several smaller swimming clubs and has enjoyed success throughout Scotland and in international competitions. Three of the team's swimmers qualified for the 2006 Commonwealth Games. Rowing There are four boat clubs that row on the River Dee: Aberdeen Boat Club (ABC), Aberdeen Schools Rowing Association (ASRA), Aberdeen University Boat Club (AUBC) and Robert Gordon University Boat Club (RGUBC). Cricket The city has one national league side, Stoneywood-Dyce. Local "Grades" cricket has been played in Aberdeen since 1884. Aberdeenshire were the 2009 and 2014 Scottish National Premier League and Scottish Cup Champions. Ice hockey Aberdeen Lynx are an ice hockey team that plays in the Scottish National League and is based at the Linx Ice Arena. Shinty Aberdeen University Shinty Club (Scottish Gaelic: Club Camanachd Oilthigh Obar Dheathain) is the oldest constituted shinty club in the world, dating back to 1861. Other sports The city council operates public tennis courts in various parks including an indoor tennis centre at Westburn Park. The Beach Leisure Centre is home to a climbing wall, gymnasium and a swimming pool. There are numerous swimming pools dotted around the city notably the largest, the Bon Accord Baths which closed down in 2008. In common with many other major towns and cities in the UK, Aberdeen has an active roller derby league, Granite City Roller Derb. American Football The Aberdeen Roughnecks American football club is a new team that started in 2012 and is the first team that Aberdeen has witnessed since the Granite City Oilers that began in 1986 and were wound up in the mid-1990s. Aberdeen Oilers Floorball Club was founded in 2007. The club initially attracted a range of experienced Scandinavian and other European players who were studying in Aberdeen. Since their formation, Aberdeen Oilers have played in the British Floorball Northern League and went on to win the league in the 2008/09 season. The club played a major role in setting up a ladies league in Scotland. The Oilers' ladies team ended up second in the first ladies league season (2008/09). Public services The public health service in Scotland, NHS Scotland provides for the people of Aberdeen through the NHS Grampian health board. Aberdeen Royal Infirmary is the largest hospital in the city and one of the largest in Europe (the location of the city's A&E department), Royal Aberdeen Children's Hospital, a paediatric hospital, Royal Cornhill Hospital for mental health, Aberdeen Maternity Hospital, an antenatal hospital, Woodend Hospital, which specialises in rehabilitation and long-term illnesses and conditions, and City Hospital and Woolmanhill Hospital, which host several out-patient clinics and offices. Albyn Hospital is a private hospital located in the west end of the city. Aberdeen City Council is responsible for city-owned infrastructure which is paid for by a mixture of Council Tax and income from the Scottish Government. Infrastructure and services run by the council include: nursery, primary and secondary education, roads, clearing snow in winter, city wardens, maintaining parks, refuse collection, economic development, public analyst, public mortuary, street cleaning and street lighting. Infrastructure in private hands includes electricity, gas and telecoms. Water and sewerage services are provided by Scottish Water. Police: Policing in Aberdeen is the responsibility of Police Scotland (the British Transport Police has responsibility for railways). Ambulance: The North East divisional headquarters of the Scottish Ambulance Service is located in Aberdeen. Fire and rescue: This is the responsibility of the Scottish Fire and Rescue Service. Lifeboat: The Royal National Lifeboat Institution operates Aberdeen Lifeboat Station. It is located at Victoria Dock Entrance in York Place. Twin cities Aberdeen is twinned with Stavanger, Norway, since 1990 Regensburg, Germany, since 1955 Clermont-Ferrand, France, since 1983 Gomel, Belarus, since 1990 Bulawayo, Zimbabwe, since 1986 Houston, Texas, US, since 1979, is twinned with the former region of Grampian of which Aberdeen is the regional centre Kobe, Japan, since 2022, is twinned with Aberdeen for its hydrogen work. Notable people and residents William Alexander (1826 - 1894), journalist and author of Johnny Gibb of Gushetneuk. Leslie Benzies, Former president of Rockstar North, creators of the critically acclaimed Grand Theft Auto series. Scott Booth, former football player, played for Aberdeen F.C., FC Twente, Borussia Dortmund and the Scotland national football team. Alf Burnett, footballer who played for Dundee United Lord Byron FRS (1788–1824), poet, was raised (age 2–10) in Aberdeen. Andrew Cant, (1584–1663) Presbyterian minister and leader of the Scottish Covenanters David Carry, swimmer, 2x 2006 Commonwealth Games gold medallist. Henry Cecil, one of the most successful horse trainers of all time. Oswald Chambers, author of My Utmost for His Highest Alexander Christie, portrait painter. Dan Crenshaw, Member of the U.S. House of Representatives from Texas's 2nd district. Andrew Cruickshank, actor famous for his role in Dr Finlay's Casebook John Mathieson Dodds, apprentice and engineer with Metrovick, Manchester and radar pioneer in Chain Home defence system for 1940 Battle of Britain. Neil Fachie, cyclist, 2012 Paralympic Games gold and silver medalist. Simon Farquhar, playwright. Graeme Garden, author, actor, comedian, artist, TV presenter, famous for The Goodies. Martin Gatt, principal bassoonist English Chamber Orchestra, LPO and LSO. Ryan Gauld, footballer who currently plays for Sporting Lisbon in the Portuguese Primeira Liga. James Gibbs, 18th-century architect. Quentin Gibson FRS (1918–2011), physiologist and biochemist James Gregory FRS (1638–1675), Scottish mathematician and astronomer, born in the manse at Drumoak, just outside Aberdeen. Attended Aberdeen Grammar School and Marischal College, University of Aberdeen. Discovered diffraction gratings a year after Newton's prism experiments, and invented the Gregorian telescope design in 1663 which is used in telescopes such as the Arecibo Observatory. David Gregory FRS (1659–1708), Scottish mathematician and astronomer. Attended Aberdeen Grammar School and Marischal College, University of Aberdeen. A professor of mathematics. Based on his uncle James Gregory's work, he extended or discovered the method of quadratures by infinite series. His principle work "Astronomiae physicae et geometricae elementa" (1702) was the first text-book on gravitational principles. Michael Gove, politician and MP. George Jamesone, Scotland's first eminent portrait-painter. Reginald Victor Jones, physicist, Chair of Natural Philosophy at the University of Aberdeen, author. John Michael Kosterlitz, physicist, professor of physics at Brown University. Awarded the Nobel Prize in physics in 2016. Denis Law, former football player, played for Manchester City, Manchester United and the Scotland national team, joint all-time record Scotland goalscorer with 30 goals. Paul Lawrie, golfer, winner of the 1999 Open Championship. Annie Lennox, musician, winner of eight Brit Awards, grew up in Ellon. Rose Leslie, actress, best known for playing Ygritte in HBO's Game of Thrones. John Macleod FRSE FRS LLD (1876–1935) Biochemist and Physiologist. For his role in the discovery and isolation of insulin he was awarded the Nobel Prize for Physiology or Medicine in 1923. John Alexander MacWilliam FRS (1857–1937), Professor of the Institutes of Medicine (later Physiology) at the University of Aberdeen. Pioneer in the field of cardiac electro-physiology & ventricular fibrillation of the heart. First to propose ventricular fibrillation as the most common cause of sudden death through heart attack. First to propose use of life saving electrical de-fibrilators. His work laid the frame work for the development of the pace maker. Laura Main, actress, best known for playing Sister Bernadette/Shelagh Turner in the BBC's Call the Midwife James Clerk Maxwell FRSE FRS (1831–1879), Chair of Natural Philosophy at Marischal College, University of Aberdeen from 1856 to 1860. Formulated the classical theory of electromagnetic radiation. Robert Morison (1620–1683), a Scottish botanist and taxonomist. He elucidated and developed the first systematic classification of plants. Gained his Master of Arts from the University of Aberdeen at the age of eighteen. For ten years Director of Louis XIV's royal gardens at Blois, France, then physician, botanist & superintendent of all royal gardens for Charles II of Scotland. Alberto Morrocco OBE FRSA FRSE RSW RP RGI LLD (1917–1998), Scottish artist and teacher famous for his landscapes of Scotland and abroad. Andy Nisbet (1953–2019), a Scottish mountaineer, guide, climbing instructor, and editor of climbing guidebooks. A pioneer of mixed rock and ice climbing techniques over 45 years. Developed over 1,000 new winter climbing routes in Scotland. Ara Paiaya, film producer and director of Skin Traffik, Instant Death and Purge of Kingdoms. Robbie Renwick, swimmer, 1x 2010 Commonwealth Games gold medalist. Professor Sir C. Duncan Rice, historian, former principal of the University of Aberdeen. Lawson Robertson (1883–1951), born in Aberdeen, competed for the U.S. Olympic Team at the 1904 Olympics in St. Louis, winning the bronze medal in the standing high jump. Head coach of U.S. track team at 4 successive Olympic games, 1924, 1928, 1932, 1936. Archibald Simpson, architect, one of Aberdeen's major architects. John Smith, architect, Aberdeen's other major architect and official City Architect Nicol Stephen, former Scottish Liberal Democrats leader, former Deputy First Minister of Scotland John Strachan, first Anglican Bishop of Toronto. Annie Wallace, actress in Hollyoaks. Ron Yeats, former football player, captain of the first great Liverpool team of the 1960s, also played for the Scotland national team. Aberdeen in popular culture Stuart MacBride's crime novels Cold Granite, Dying Light, Broken Skin, Flesh House, Blind Eye and Dark Blood (a series with main protagonist, DS Logan McRae) are all set in Aberdeen. A large part of the plot of the World War II thriller Eye of the Needle by Welsh author, Ken Follett, takes place in wartime Aberdeen, from which a German spy is trying to escape to a submarine waiting offshore. A portion of Ian Rankin's novel Black and Blue (1997) is set in Aberdeen, where its nickname "Furry Boots" is noted. Songs titled "Aberdeen" have been recorded by the music groups Danny Wilson, Royseven, and Cage the Elephant. The Scottish rock band The Xcerts released the song "Aberdeen 1987" on their debut album In the Cold Wind We Smile, released on 30 March 2009. The first verse contains the line "15, sitting in a graveyard talking about their history". The graveyard referenced in the song is the graveyard of the Kirk of St Nicholas on Union Street. See also Aberdeen Bestiary Aberdeen City Youth Council Aberdeen Safer Community Trust Aberdeen typhoid outbreak 1964 Aberdonia (disambiguation) List of places in Aberdeen List of places in Scotland Our Lady of Aberdeen Voluntary Service Aberdeen Freedom of the City of Aberdeen Notes References Further reading Shepherd, Mike (2015). Oil Strike North Sea: A first-hand history of North Sea oil. Luath Press. External links Aberdeen City Council A collection of historic maps of Aberdeen from the 1660s onward at National Library of Scotland A selection of archive films relating to Aberdeen at the Scottish Screen Archive Engraving of Aberdeen in 1693 by John Slezer at National Library of Scotland Cities in Scotland Council areas of Scotland Fishing communities in Scotland Lieutenancy areas of Scotland Port cities and towns in Scotland Port cities and towns of the North Sea Royal burghs Grampian

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https://en.wikipedia.org/wiki/Aquaculture

Aquaculture

Aquaculture (less commonly spelled aquiculture), also known as aquafarming, is the controlled cultivation ("farming") of aquatic organisms such as fish, crustaceans, mollusks, algae and other organisms of value such as aquatic plants (e.g. lotus). Aquaculture involves cultivating freshwater, brackish water and saltwater populations under controlled or semi-natural conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish. Mariculture, commonly known as marine farming, refers specifically to aquaculture practiced in seawater habitats and lagoons, as opposed to freshwater aquaculture. Pisciculture is a type of aquaculture that consists of fish farming to obtain fish products as food. Aquaculture can also be defined as the breeding, growing, and harvesting of fish and other aquatic plants, also known as farming in water. It is an environmental source of food and commercial product which help to improve healthier habitats and used to reconstruct population of endangered aquatic species. Technology has increased the growth of fish in coastal marine waters and open oceans due to the increased demand for seafood. Aquaculture can be conducted in completely artificial facilities built on land (onshore aquaculture), as in the case of fish tank, ponds, aquaponics or raceways, where the living conditions rely on human control such as water quality (oxygen), feed, temperature. Alternatively, they can be conducted on well-sheltered shallow waters nearshore of a body of water (inshore aquaculture), where the cultivated species are subjected to a relatively more naturalistic environments; or on fenced/enclosed sections of open water away from the shore (offshore aquaculture), where the species are either cultured in cages, racks or bags, and are exposed to more diverse natural conditions such as water currents (such as ocean currents), diel vertical migration and nutrient cycles. According to the Food and Agriculture Organization (FAO), aquaculture "is understood to mean the farming of aquatic organisms including fish, molluscs, crustaceans and aquatic plants. Farming implies some form of intervention in the rearing process to enhance production, such as regular stocking, feeding, protection from predators, etc. Farming also implies individual or corporate ownership of the stock being cultivated." The reported output from global aquaculture operations in 2019 was over 120 million tonnes valued at US$274 billion. However, there are issues with the reliability of the reported figures. Further, in current aquaculture practice, products from several kilograms of wild fish are used to produce one kilogram of a piscivorous fish like salmon. Plant and insect-based feeds are also being developed to help reduce wild fish been used for aquaculture feed. Particular kinds of aquaculture include fish farming, shrimp farming, oyster farming, mariculture, pisciculture, algaculture (such as seaweed farming), and the cultivation of ornamental fish. Particular methods include aquaponics and integrated multi-trophic aquaculture, both of which integrate fish farming and aquatic plant farming. The FAO describes aquaculture as one of the industries most directly affected by climate change and its impacts. Some forms of aquaculture have negative impacts on the environment, such as through nutrient pollution or disease transfer to wild populations. Overview Harvest stagnation in wild fisheries and overexploitation of popular marine species, combined with a growing demand for high-quality protein, encouraged aquaculturists to domesticate other marine species. At the outset of modern aquaculture, many were optimistic that a "Blue Revolution" could take place in aquaculture, just as the Green Revolution of the 20th century had revolutionized agriculture. Although land animals had long been domesticated, most seafood species were still caught from the wild. Concerned about the impact of growing demand for seafood on the world's oceans, prominent ocean explorer Jacques Cousteau wrote in 1973: "With earth's burgeoning human populations to feed, we must turn to the sea with new understanding and new technology." About 430 (97%) of the species cultured were domesticated during the 20th and 21st centuries, of which an estimated 106 came in the decade to 2007. Given the long-term importance of agriculture, to date, only 0.08% of known land plant species and 0.0002% of known land animal species have been domesticated, compared with 0.17% of known marine plant species and 0.13% of known marine animal species. Domestication typically involves about a decade of scientific research. Domesticating aquatic species involves fewer risks to humans than do land animals, which took a large toll in human lives. Most major human diseases originated in domesticated animals, including diseases such as smallpox and diphtheria, that like most infectious diseases, move to humans from animals. No human pathogens of comparable virulence have yet emerged from marine species. Biological control methods to manage parasites are already being used, such as cleaner fish (e.g. lumpsuckers and wrasse) to control sea lice populations in salmon farming. Models are being used to help with spatial planning and siting of fish farms in order to minimize impact. The decline in wild fish stocks has increased the demand for farmed fish. However, finding alternative sources of protein and oil for fish feed is necessary so the aquaculture industry can grow sustainably; otherwise, it represents a great risk for the over-exploitation of forage fish. Aquaculture production now exceeds capture fishery production and together the relative GDP contribution has ranged from 0.01 to 10%. Singling out aquaculture's relative contribution to GDP, however, is not easily derived due to lack of data. Another recent issue following the banning in 2008 of organotins by the International Maritime Organization is the need to find environmentally friendly, but still effective, compounds with antifouling effects. Many new natural compounds are discovered every year, but producing them on a large enough scale for commercial purposes is almost impossible. It is highly probable that future developments in this field will rely on microorganisms, but greater funding and further research is needed to overcome the lack of knowledge in this field. Species groups Aquatic plants Microalgae, also referred to as phytoplankton, microphytes, or planktonic algae, constitute the majority of cultivated algae. Macroalgae commonly known as seaweed also have many commercial and industrial uses, but due to their size and specific requirements, they are not easily cultivated on a large scale and are most often taken in the wild. In 2016, aquaculture was the source of 96.5 percent by volume of the total 31.2 million tonnes of wild-collected and cultivated aquatic plants combined. Global production of farmed aquatic plants, overwhelmingly dominated by seaweeds, grew in output volume from 13.5 million tonnes in 1995 to just over 30 million tonnes in 2016. Seaweed farming Fish The farming of fish is the most common form of aquaculture. It involves raising fish commercially in tanks, fish ponds, or ocean enclosures, usually for food. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. Worldwide, the most important fish species used in fish farming are, in order, carp, salmon, tilapia, and catfish. In the Mediterranean, young bluefin tuna are netted at sea and towed slowly towards the shore. They are then interned in offshore pens (sometimes made from floating HDPE pipe) where they are further grown for the market. In 2009, researchers in Australia managed for the first time to coax southern bluefin tuna to breed in landlocked tanks. Southern bluefin tuna are also caught in the wild and fattened in grow-out sea cages in southern Spencer Gulf, South Australia. A similar process is used in the salmon-farming section of this industry; juveniles are taken from hatcheries and a variety of methods are used to aid them in their maturation. For example, as stated above, some of the most important fish species in the industry, salmon, can be grown using a cage system. This is done by having netted cages, preferably in open water that has a strong flow, and feeding the salmon a special food mixture that aids their growth. This process allows for year-round growth of the fish, thus a higher harvest during the correct seasons. An additional method, known sometimes as sea ranching, has also been used within the industry. Sea ranching involves raising fish in a hatchery for a brief time and then releasing them into marine waters for further development, whereupon the fish are recaptured when they have matured. Crustaceans Commercial shrimp farming began in the 1970s, and production grew steeply thereafter. Global production reached more than 1.6 million tonnes in 2003, worth about US$9 billion. About 75% of farmed shrimp is produced in Asia, in particular in China and Thailand. The other 25% is produced mainly in Latin America, where Brazil is the largest producer. Thailand is the largest exporter. Shrimp farming has changed from its traditional, small-scale form in Southeast Asia into a global industry. Technological advances have led to ever higher densities per unit area, and broodstock is shipped worldwide. Virtually all farmed shrimp are penaeids (i.e., shrimp of the family Penaeidae), and just two species of shrimp, the Pacific white shrimp and the giant tiger prawn, account for about 80% of all farmed shrimp. These industrial monocultures are very susceptible to disease, which has decimated shrimp populations across entire regions. Increasing ecological problems, repeated disease outbreaks, and pressure and criticism from both nongovernmental organizations and consumer countries led to changes in the industry in the late 1990s and generally stronger regulations. In 1999, governments, industry representatives, and environmental organizations initiated a program aimed at developing and promoting more sustainable farming practices through the Seafood Watch program. Freshwater prawn farming shares many characteristics with, including many problems with, marine shrimp farming. Unique problems are introduced by the developmental lifecycle of the main species, the giant river prawn. The global annual production of freshwater prawns (excluding crayfish and crabs) in 2007 was about 460,000 tonnes, exceeding 1.86 billion dollars. Additionally, China produced about 370,000 tonnes of Chinese river crab. In addition astaciculture is the freshwater farming of crayfish (mostly in the US, Australia, and Europe). Molluscs Aquacultured shellfish include various oyster, mussel, and clam species. These bivalves are filter and/or deposit feeders, which rely on ambient primary production rather than inputs of fish or other feed. As such, shellfish aquaculture is generally perceived as benign or even beneficial. Depending on the species and local conditions, bivalve molluscs are either grown on the beach, on longlines, or suspended from rafts and harvested by hand or by dredging. In May 2017 a Belgian consortium installed the first of two trial mussel farms on a wind farm in the North Sea. Abalone farming began in the late 1950s and early 1960s in Japan and China. Since the mid-1990s, this industry has become increasingly successful. Overfishing and poaching have reduced wild populations to the extent that farmed abalone now supplies most abalone meat. Sustainably farmed molluscs can be certified by Seafood Watch and other organizations, including the World Wildlife Fund (WWF). WWF initiated the "Aquaculture Dialogues" in 2004 to develop measurable and performance-based standards for responsibly farmed seafood. In 2009, WWF co-founded the Aquaculture Stewardship Council with the Dutch Sustainable Trade Initiative to manage the global standards and certification programs. After trials in 2012, a commercial "sea ranch" was set up in Flinders Bay, Western Australia, to raise abalone. The ranch is based on an artificial reef made up of 5000 () separate concrete units called abitats (abalone habitats). The 900 kg abitats can host 400 abalone each. The reef is seeded with young abalone from an onshore hatchery. The abalone feed on seaweed that has grown naturally on the habitats, with the ecosystem enrichment of the bay also resulting in growing numbers of dhufish, pink snapper, wrasse, and Samson fish, among other species. Brad Adams, from the company, has emphasised the similarity to wild abalone and the difference from shore-based aquaculture. "We're not aquaculture, we're ranching, because once they're in the water they look after themselves." Other groups Other groups include aquatic reptiles, amphibians, and miscellaneous invertebrates, such as echinoderms and jellyfish. They are separately graphed at the top right of this section, since they do not contribute enough volume to show clearly on the main graph. Commercially harvested echinoderms include sea cucumbers and sea urchins. In China, sea cucumbers are farmed in artificial ponds as large as . Global fish production Global fish production peaked at about 171 million tonnes in 2016, with aquaculture representing 47 percent of the total and 53 percent if non-food uses (including reduction to fishmeal and fish oil) are excluded. With capture fishery production relatively static since the late 1980s, aquaculture has been responsible for the continuing growth in the supply of fish for human consumption. Global aquaculture production (including aquatic plants) in 2016 was 110.2 million tonnes, with the first-sale value estimated at US$244 billion. Three years later, in 2019 the reported output from global aquaculture operations was over 120 million tonnes valued at US$274 billion. The contribution of aquaculture to the global production of capture fisheries and aquaculture combined has risen continuously, reaching 46.8 percent in 2016, up from 25.7 percent in 2000. With 5.8 percent annual growth rate during the period 2001–2016, aquaculture continues to grow faster than other major food production sectors, but it no longer has the high annual growth rates experienced in the 1980s and 1990s. In 2012, the total world production of fisheries was 158 million tonnes, of which aquaculture contributed 66.6 million tonnes, about 42%. The growth rate of worldwide aquaculture has been sustained and rapid, averaging about 8% per year for over 30 years, while the take from wild fisheries has been essentially flat for the last decade. The aquaculture market reached $86 billion in 2009. Aquaculture is an especially important economic activity in China. Between 1980 and 1997, the Chinese Bureau of Fisheries reports, aquaculture harvests grew at an annual rate of 16.7%, jumping from 1.9 million tonnes to nearly 23 million tonnes. In 2005, China accounted for 70% of world production. Aquaculture is also currently one of the fastest-growing areas of food production in the U.S. About 90% of all U.S. shrimp consumption is farmed and imported. In recent years, salmon aquaculture has become a major export in southern Chile, especially in Puerto Montt, Chile's fastest-growing city. A United Nations report titled The State of the World Fisheries and Aquaculture released in May 2014 maintained fisheries and aquaculture support the livelihoods of some 60 million people in Asia and Africa. FAO estimates that in 2016, overall, women accounted for nearly 14 percent of all people directly engaged in the fisheries and aquaculture primary sector. Over-reporting by China China overwhelmingly dominates the world in reported aquaculture output, reporting a total output which is double that of the rest of the world put together. However, there are some historical issues with the accuracy of China's returns. In 2001, scientists Reg Watson and Daniel Pauly expressed concerns that China was over reporting its catch from wild fisheries in the 1990s. They said that made it appear that the global catch since 1988 was increasing annually by 300,000 tonnes, whereas it was really shrinking annually by 350,000 tonnes. Watson and Pauly suggested this may have been related to Chinese policies where state entities that monitored the economy were also tasked with increasing output. Also, until more recently, the promotion of Chinese officials was based on production increases from their own areas. China disputed this claim. The official Xinhua News Agency quoted Yang Jian, director general of the Agriculture Ministry's Bureau of Fisheries, as saying that China's figures were "basically correct". However, the FAO accepted there were issues with the reliability of China's statistical returns, and for a period treated data from China, including the aquaculture data, apart from the rest of the world. Aquacultural methods Mariculture Mariculture refers to the cultivation of marine organisms in seawater, usually in sheltered coastal or offshore waters. The farming of marine fish is an example of mariculture, and so also is the farming of marine crustaceans (such as shrimp), mollusks (such as oysters), and seaweed. Channel catfish (Ictalurus punctatus), hard clams (Mercenaria mercenaria) and Atlantic salmon (Salmo salar) are prominent in the U.S. mariculture. Mariculture may consist of raising the organisms on or in artificial enclosures such as in floating netted enclosures for salmon and on racks for oysters. In the case of enclosed salmon, they are fed by the operators; oysters on racks filter feed on naturally available food. Abalone have been farmed on an artificial reef consuming seaweed which grows naturally on the reef units. Integrated Integrated multi-trophic aquaculture (IMTA) is a practice in which the byproducts (wastes) from one species are recycled to become inputs (fertilizers, food) for another. Fed aquaculture (for example, fish, shrimp) is combined with inorganic extractive and organic extractive (for example, shellfish) aquaculture to create balanced systems for environmental sustainability (biomitigation), economic stability (product diversification and risk reduction) and social acceptability (better management practices). "Multi-trophic" refers to the incorporation of species from different trophic or nutritional levels in the same system. This is one potential distinction from the age-old practice of aquatic polyculture, which could simply be the co-culture of different fish species from the same trophic level. In this case, these organisms may all share the same biological and chemical processes, with few synergistic benefits, which could potentially lead to significant shifts in the ecosystem. Some traditional polyculture systems may, in fact, incorporate a greater diversity of species, occupying several niches, as extensive cultures (low intensity, low management) within the same pond. A working IMTA system can result in greater total production based on mutual benefits to the co-cultured species and improved ecosystem health, even if the production of individual species is lower than in a monoculture over a short-term period. Sometimes the term "integrated aquaculture" is used to describe the integration of monocultures through water transfer. For all intents and purposes, however, the terms "IMTA" and "integrated aquaculture" differ only in their degree of descriptiveness. Aquaponics, fractionated aquaculture, integrated agriculture-aquaculture systems, integrated peri-urban-aquaculture systems, and integrated fisheries-aquaculture systems are other variations of the IMTA concept. Urban aquaculture Netting materials Various materials, including nylon, polyester, polypropylene, polyethylene, plastic-coated welded wire, rubber, patented rope products (Spectra, Thorn-D, Dyneema), galvanized steel and copper are used for netting in aquaculture fish enclosures around the world. All of these materials are selected for a variety of reasons, including design feasibility, material strength, cost, and corrosion resistance. Recently, copper alloys have become important netting materials in aquaculture because they are antimicrobial (i.e., they destroy bacteria, viruses, fungi, algae, and other microbes) and they therefore prevent biofouling (i.e., the undesirable accumulation, adhesion, and growth of microorganisms, plants, algae, tubeworms, barnacles, mollusks, and other organisms). By inhibiting microbial growth, copper alloy aquaculture cages avoid costly net changes that are necessary with other materials. The resistance of organism growth on copper alloy nets also provides a cleaner and healthier environment for farmed fish to grow and thrive. Issues If performed without consideration for potential local environmental impacts, aquaculture in inland waters can result in more environmental damage than wild fisheries, though with less waste produced per kg on a global scale. Local concerns with aquaculture in inland waters may include waste handling, side-effects of antibiotics, competition between farmed and wild animals, and the potential introduction of invasive plant and animal species, or foreign pathogens, particularly if unprocessed fish are used to feed more marketable carnivorous fish. If non-local live feeds are used, aquaculture may introduce exotic plants or animals with disastrous effects. Improvements in methods resulting from advances in research and the availability of commercial feeds has reduced some of these concerns since their greater prevalence in the 1990s and 2000s . Fish waste is organic and composed of nutrients necessary in all components of aquatic food webs. In-ocean aquaculture often produces much higher than normal fish waste concentrations. The waste collects on the ocean bottom, damaging or eliminating bottom-dwelling life. Waste can also decrease dissolved oxygen levels in the water column, putting further pressure on wild animals. An alternative model to food being added to the ecosystem, is the installation of artificial reef structures to increase the habitat niches available, without the need to add any more than ambient feed and nutrient. This has been used in the "ranching" of abalone in Western Australia. Impacts on wild fish Some carnivorous and omnivorous farmed fish species are fed wild forage fish. Although carnivorous farmed fish represented only 13 percent of aquaculture production by weight in 2000, they represented 34 percent of aquaculture production by value. Farming of carnivorous species like salmon and shrimp leads to a high demand for forage fish to match the nutrition they get in the wild. Fish do not actually produce omega-3 fatty acids, but instead accumulate them from either consuming microalgae that produce these fatty acids, as is the case with forage fish like herring and sardines, or, as is the case with fatty predatory fish, like salmon, by eating prey fish that have accumulated omega-3 fatty acids from microalgae. To satisfy this requirement, more than 50 percent of the world fish oil production is fed to farmed salmon. Farmed salmon consume more wild fish than they generate as a final product, although the efficiency of production is improving. To produce one kilograms of farmed salmon, products from several kilograms of wild fish are fed to them – this can be described as the "fish-in-fish-out" (FIFO) ratio. In 1995, salmon had a FIFO ratio of 7.5 (meaning 7.5 kilograms of wild fish feed were required to produce one kilogram of salmon); by 2006 the ratio had fallen to 4.9. Additionally, a growing share of fish oil and fishmeal come from residues (byproducts of fish processing), rather than dedicated whole fish. In 2012, 34 percent of fish oil and 28 percent of fishmeal came from residues. However, fishmeal and oil from residues instead of whole fish have a different composition with more ash and less protein, which may limit its potential use for aquaculture. As the salmon farming industry expands, it requires more wild forage fish for feed, at a time when seventy-five percent of the world's monitored fisheries are already near to or have exceeded their maximum sustainable yield. The industrial-scale extraction of wild forage fish for salmon farming then impacts the survivability of the wild predator fish who rely on them for food. An important step in reducing the impact of aquaculture on wild fish is shifting carnivorous species to plant-based feeds. Salmon feeds, for example, have gone from containing only fishmeal and oil to containing 40 percent plant protein. The USDA has also experimented with using grain-based feeds for farmed trout. When properly formulated (and often mixed with fishmeal or oil), plant-based feeds can provide proper nutrition and similar growth rates in carnivorous farmed fish. Another impact aquaculture production can have on wild fish is the risk of fish escaping from coastal pens, where they can interbreed with their wild counterparts, diluting wild genetic stocks. Escaped fish can become invasive, out-competing native species. Animal welfare As with the farming of terrestrial animals, social attitudes influence the need for humane practices and regulations in farmed marine animals. Under the guidelines advised by the Farm Animal Welfare Council good animal welfare means both fitness and a sense of well-being in the animal's physical and mental state. This can be defined by the Five Freedoms: Freedom from hunger & thirst Freedom from discomfort Freedom from pain, disease, or injury Freedom to express normal behaviour Freedom from fear and distress However, the controversial issue in aquaculture is whether fish and farmed marine invertebrates are actually sentient, or have the perception and awareness to experience suffering. Although no evidence of this has been found in marine invertebrates, recent studies conclude that fish do have the necessary receptors (nociceptors) to sense noxious stimuli and so are likely to experience states of pain, fear and stress. Consequently, welfare in aquaculture is directed at vertebrates, finfish in particular. Common welfare concerns Welfare in aquaculture can be impacted by a number of issues such as stocking densities, behavioural interactions, disease and parasitism. A major problem in determining the cause of impaired welfare is that these issues are often all interrelated and influence each other at different times. Optimal stocking density is often defined by the carrying capacity of the stocked environment and the amount of individual space needed by the fish, which is very species specific. Although behavioural interactions such as shoaling may mean that high stocking densities are beneficial to some species, in many cultured species high stocking densities may be of concern. Crowding can constrain normal swimming behaviour, as well as increase aggressive and competitive behaviours such as cannibalism, feed competition, territoriality and dominance/subordination hierarchies. This potentially increases the risk of tissue damage due to abrasion from fish-to-fish contact or fish-to-cage contact. Fish can suffer reductions in food intake and food conversion efficiency. In addition, high stocking densities can result in water flow being insufficient, creating inadequate oxygen supply and waste product removal. Dissolved oxygen is essential for fish respiration and concentrations below critical levels can induce stress and even lead to asphyxiation. Ammonia, a nitrogen excretion product, is highly toxic to fish at accumulated levels, particularly when oxygen concentrations are low. Many of these interactions and effects cause stress in the fish, which can be a major factor in facilitating fish disease. For many parasites, infestation depends on the host's degree of mobility, the density of the host population and vulnerability of the host's defence system. Sea lice are the primary parasitic problem for finfish in aquaculture, high numbers causing widespread skin erosion and haemorrhaging, gill congestion, and increased mucus production. There are also a number of prominent viral and bacterial pathogens that can have severe effects on internal organs and nervous systems. Improving welfare The key to improving welfare of marine cultured organisms is to reduce stress to a minimum, as prolonged or repeated stress can cause a range of adverse effects. Attempts to minimise stress can occur throughout the culture process. Understanding and providing required environmental enrichment can be vital for reducing stress and benefit aquaculture objects such as improved growth body condition and reduced damage from aggression. During grow-out it is important to keep stocking densities at appropriate levels specific to each species, as well as separating size classes and grading to reduce aggressive behavioural interactions. Keeping nets and cages clean can assist positive water flow to reduce the risk of water degradation. Not surprisingly disease and parasitism can have a major effect on fish welfare and it is important for farmers not only to manage infected stock but also to apply disease prevention measures. However, prevention methods, such as vaccination, can also induce stress because of the extra handling and injection. Other methods include adding antibiotics to feed, adding chemicals into water for treatment baths and biological control, such as using cleaner wrasse to remove lice from farmed salmon. Many steps are involved in transport, including capture, food deprivation to reduce faecal contamination of transport water, transfer to transport vehicle via nets or pumps, plus transport and transfer to the delivery location. During transport water needs to be maintained to a high quality, with regulated temperature, sufficient oxygen and minimal waste products. In some cases anaesthetics may be used in small doses to calm fish before transport. Aquaculture is sometimes part of an environmental rehabilitation program or as an aid in conserving endangered species. Coastal ecosystems Aquaculture is becoming a significant threat to coastal ecosystems. About 20 percent of mangrove forests have been destroyed since 1980, partly due to shrimp farming. An extended cost–benefit analysis of the total economic value of shrimp aquaculture built on mangrove ecosystems found that the external costs were much higher than the external benefits. Over four decades, of Indonesian mangroves have been converted to shrimp farms. Most of these farms are abandoned within a decade because of the toxin build-up and nutrient loss. Pollution from sea cage aquaculture Salmon farms are typically sited in pristine coastal ecosystems which they then pollute. A farm with 200,000 salmon discharges more fecal waste than a city of 60,000 people. This waste is discharged directly into the surrounding aquatic environment, untreated, often containing antibiotics and pesticides." There is also an accumulation of heavy metals on the benthos (seafloor) near the salmon farms, particularly copper and zinc. In 2016, mass fish kill events impacted salmon farmers along Chile's coast and the wider ecology. Increases in aquaculture production and its associated effluent were considered to be possible contributing factors to fish and molluscan mortality. Sea cage aquaculture is responsible for nutrient enrichment of the waters in which they are established. This results from fish wastes and uneaten feed inputs. Elements of most concern are nitrogen and phosphorus which can promote algal growth, including harmful algal blooms which can be toxic to fish. Flushing times, current speeds, distance from the shore and water depth are important considerations when locating sea cages in order to minimize the impacts of nutrient enrichment on coastal ecosystems. The extent of the effects of pollution from sea-cage aquaculture varies depending on where the cages are located, which species are kept, how densely cages are stocked and what the fish are fed. Important species-specific variables include the species' food conversion ratio (FCR) and nitrogen retention. Freshwater ecosystems Whole-lake experiments carried out at the Experimental Lakes Area in Ontario, Canada, have displayed the potential for cage aquaculture to source numerous changes in freshwater ecosystems. Following the initiation of an experimental rainbow trout cage farm in a small boreal lake, dramatic reductions in mysis concentrations associated with a decrease in dissolved oxygen were observed. Significant increases in ammonium and total phosphorus, a driver for eutrophication in freshwater systems, were measured in the hypolimnion of the lake. Annual phosphorus inputs from aquaculture waste exceeded that of natural inputs from atmospheric deposition and inflows, and phytoplankton biomass has had a fourfold annual increase following the initiation of the experimental farm. Genetic modification A type of salmon called the AquAdvantage salmon has been genetically modified for faster growth, although it has not been approved for commercial use, due to controversy. The altered salmon incorporates a growth hormone from a Chinook salmon that allows it to reach full size in 16–28 months, instead of the normal 36 months for Atlantic salmon, and while consuming 25 percent less feed. The U.S. Food and Drug Administration reviewed the AquAdvantage salmon in a draft environmental assessment and determined that it "would not have a significant impact (FONSI) on the U.S. environment." Fish diseases, parasites and vaccines A major difficulty for aquaculture is the tendency towards monoculture and the associated risk of widespread disease. Aquaculture is also associated with environmental risks; for instance, shrimp farming has caused the destruction of important mangrove forests throughout southeast Asia. In the 1990s, disease wiped out China's farmed Farrer's scallop and white shrimp and required their replacement by other species. Needs of the aquaculture sector in vaccines Aquaculture has an average annual growth rate of 9.2%, however, the success and continued expansion of the fish farming sector is highly dependent on the control of fish pathogens including a wide range of viruses, bacteria, fungi, and parasites. In 2014, it was estimated that these parasites cost the global salmon farming industry up to 400 million Euros. This represents 6–10% of the production value of the affected countries, but it can go up to 20% (Fisheries and Oceans Canada, 2014). Since pathogens quickly spread within a population of cultured fish, their control is vital for the sector. Historically, the use of antibiotics was against bacterial epizootics but the production of animal proteins has to be sustainable, which means that preventive measures that are acceptable from a biological and environmental point of view should be used to keep disease problems in aquaculture at an acceptable level. So, this added to the efficiency of vaccines resulted in an immediate and permanent reduction in the use of antibiotics in the 90s. In the beginning, there were fish immersion vaccines efficient against the vibriosis but proved ineffective against the furunculosis, hence the arrival of injectable vaccines: first water-based and after oil-based, much more efficient (Sommerset, 2005). Development of new vaccines It is the important mortality in cages among farmed fish, the debates around DNA injection vaccines, although effective, their safety and their side effects but also societal expectations for cleaner fish and security, lead research on new vaccine vectors. Several initiatives are financed by the European Union to develop a rapid and cost-effective approach to using bacteria in feed to make vaccines, in particular thanks to lactic bacteria whose DNA is modified (Boudinot, 2006). In fact, vaccinating farmed fish by injection is time-consuming and costly, so vaccines can be administered orally or by immersion by being added to feed or directly into water. This allows vaccinating many individuals at the same time while limiting the associated handling and stress. Indeed, many tests are necessary because the antigens of the vaccines must be adapted to each species or not present a certain level of variability or they will not have any effect. For example, tests have been done with two species: Lepeophtheirus salmonis (from which the antigens were collected) and Caligus rogercresseyi (which was vaccinated with the antigens), although the homology between the two species is important, the level of variability made the protection ineffective (Fisheries and Oceans Canada, 2014). Recent vaccines development in aquaculture There are 24 vaccines available and one for lobsters. The first vaccine was used in the USA against enteric red mouth in 1976. However, there are 19 companies and some small stakeholders are producing vaccines for aquaculture nowadays. The novel approaches are a way forward to prevent the loss of 10% of aquaculture through disease. Genetically modified vaccines are not being used in the EU due to societal concerns and regulations. Meanwhile, DNA vaccines are now authorised in the EU. There are challenges in fish vaccine development, immune response due to lack of potent adjScientists are considering microdose application in future. But there are also exciting opportunities in aquaculture vaccinology due to the low cost of technology, regulations change and novel antigen expression and delivery systems. In Norway subunit vaccine (VP2 peptide) against infectious pancreatic necrosis is being used. In Canada, a licensed DNA vaccine against Infectious hematopoietic necrosis has been launched for industry use. Fish have large mucosal surfaces, so the preferred route is immersion, intraperitoneal and oral respectively. Nanoparticles are in progress for delivery purposes. The common antibodies produced are IgM and IgT. Normally booster is not required ifn Fish because more memory cells are produced in response to the booster rather than an increased level of antibodies. mRNA vaccines are alternative to DNA vaccines because they are more safe, stable, easily producible at a large scale and mass immunization potential. Recently these are used in cancer prevention and therapeutics. Studies in rabies has shown that efficacy depends on dose and route of administration. These are still in infancy. Economic gains In 2014, the aquaculture produced fish overtook wild caught fish, in supply for human food. This means there is a huge demand for vaccines, in prevention of diseases. The reported annual loss fish, calculates to >10 billion USD. This is from approximately 10% of all fishes dying from infectious diseases. The high annual losses increases the demand for vaccines. Even though there are about 24 traditionally used vaccines, there is still demand for more vaccines. The breakthrough of DNA-vaccines has sunk the cost of vaccines. The alternative to vaccines would be antibiotics and chemotherapy, which are more expensive and with bigger drawbacks. DNA-vaccines have become the most cost-efficient method of preventing infectious diseases. This bouts well for DNA-vaccines becoming the new standard both in fish vaccines, and in general vaccines. Salinization/acidification of soils Sediment from abandoned aquaculture farms can remain hypersaline, acidic and eroded. This material can remain unusable for aquaculture purposes for long periods thereafter. Various chemical treatments, such as adding lime, can aggravate the problem by modify the physicochemical characteristics of the sediment. Plastic pollution Aquaculture produces a range of marine debris, depending on the product and location. The most frequently documented type of plastic is expanded polystyrene (EPS), used extensively in floats and sea cage collars (MEPC 2020). Other common waste items include cage nets and plastic harvest bins. A review of aquaculture as a source of marine litter in the North, Baltic and Mediterranean Seas identified 64 different items, 19 of which were unique to aquaculture . Estimates of the amount of aquaculture waste entering the oceans vary widely, depending on the methodologies used. For example, in the European Economic Area loss estimates have varied from a low of 3,000 tonnes to 41,000 tonnes per year. Ecological benefits While some forms of aquaculture can be devastating to ecosystems, such as shrimp farming in mangroves, other forms can be beneficial. Shellfish aquaculture adds substantial filter feeding capacity to an environment which can significantly improve water quality. A single oyster can filter 15 gallons of water a day, removing microscopic algal cells. By removing these cells, shellfish are removing nitrogen and other nutrients from the system and either retaining it or releasing it as waste which sinks to the bottom. By harvesting these shellfish, the nitrogen they retained is completely removed from the system. Raising and harvesting kelp and other macroalgae directly remove nutrients such as nitrogen and phosphorus. Repackaging these nutrients can relieve eutrophic, or nutrient-rich, conditions known for their low dissolved oxygen which can decimate species diversity and abundance of marine life. Removing algal cells from the water also increases light penetration, allowing plants such as eelgrass to reestablish themselves and further increase oxygen levels. Aquaculture in an area can provide for crucial ecological functions for the inhabitants. Shellfish beds or cages can provide habitat structure. This structure can be used as shelter by invertebrates, small fish or crustaceans to potentially increase their abundance and maintain biodiversity. Increased shelter raises stocks of prey fish and small crustaceans by increasing recruitment opportunities in turn providing more prey for higher trophic levels. One study estimated that 10 square meters of oyster reef could enhance an ecosystem's biomass by 2.57 kg Herbivore shellfish will also be preyed on. This moves energy directly from primary producers to higher trophic levels potentially skipping out on multiple energetically costly trophic jumps which would increase biomass in the ecosystem. Seaweed farming is a carbon negative crop, with a high potential for climate change mitigation. The IPCC Special Report on the Ocean and Cryosphere in a Changing Climate recommends "further research attention" as a mitigation tactic. Regenerative ocean farming is a polyculture farming system that grows a mix of seaweeds and shellfish while sequestering carbon, decreasing nitrogen in the water and increasing oxygen, helping to regenerate and restore local habitat like reef ecosystems. Prospects Global wild fisheries are in decline, with valuable habitat such as estuaries in critical condition. The aquaculture or farming of piscivorous fish, like salmon, does not help the problem because they need to eat products from other fish, such as fish meal and fish oil. Studies have shown that salmon farming has major negative impacts on wild salmon, as well as the forage fish that need to be caught to feed them. Fish that are higher on the food chain are less efficient sources of food energy. Apart from fish and shrimp, some aquaculture undertakings, such as seaweed and filter-feeding bivalve mollusks like oysters, clams, mussels and scallops, are relatively benign and even environmentally restorative. Filter-feeders filter pollutants as well as nutrients from the water, improving water quality. Seaweeds extract nutrients such as inorganic nitrogen and phosphorus directly from the water, and filter-feeding mollusks can extract nutrients as they feed on particulates, such as phytoplankton and detritus. Some profitable aquaculture cooperatives promote sustainable practices. New methods lessen the risk of biological and chemical pollution through minimizing fish stress, fallowing netpens, and applying integrated pest management. Vaccines are being used more and more to reduce antibiotic use for disease control. Onshore recirculating aquaculture systems, facilities using polyculture techniques, and properly sited facilities (for example, offshore areas with strong currents) are examples of ways to manage negative environmental effects. Recirculating aquaculture systems (RAS) recycle water by circulating it through filters to remove fish waste and food and then recirculating it back into the tanks. This saves water and the waste gathered can be used in compost or, in some cases, could even be treated and used on land. While RAS was developed with freshwater fish in mind, scientists associated with the Agricultural Research Service have found a way to rear saltwater fish using RAS in low-salinity waters. Although saltwater fish are raised in off-shore cages or caught with nets in water that typically has a salinity of 35 parts per thousand (ppt), scientists were able to produce healthy pompano, a saltwater fish, in tanks with a salinity of only 5 ppt. Commercializing low-salinity RAS are predicted to have positive environmental and economical effects. Unwanted nutrients from the fish food would not be added to the ocean and the risk of transmitting diseases between wild and farm-raised fish would greatly be reduced. The price of expensive saltwater fish, such as the pompano and cobia used in the experiments, would be reduced. However, before any of this can be done researchers must study every aspect of the fish's lifecycle, including the amount of ammonia and nitrate the fish will tolerate in the water, what to feed the fish during each stage of its lifecycle, the stocking rate that will produce the healthiest fish, etc. Some 16 countries now use geothermal energy for aquaculture, including China, Israel, and the United States. In California, for example, 15 fish farms produce tilapia, bass, and catfish with warm water from underground. This warmer water enables fish to grow all year round and mature more quickly. Collectively these California farms produce 4.5 million kilograms of fish each year. Global goals The UN Sustainable Development Goal 14 ("life below water"), Target 14.7 includes aquaculture: "By 2030, increase the economic benefits to small island developing states and least developed countries from the sustainable use of marine resources, including through sustainable management of fisheries, aquaculture and tourism". Aquaculture's contribution to GDP is not included in SDG Target 14.7 but methods for quantifying this have been explored by FAO. National laws, regulations, and management Laws governing aquaculture practices vary greatly by country and are often not closely regulated or easily traceable. In the United States, land-based and nearshore aquaculture is regulated at the federal and state levels; however, no national laws govern offshore aquaculture in U.S. exclusive economic zone waters. In June 2011, the Department of Commerce and National Oceanic and Atmospheric Administration released national aquaculture policies to address this issue and "to meet the growing demand for healthy seafood, to create jobs in coastal communities, and restore vital ecosystems." Large aquaculture facilities (i.e. those producing per year) which discharge wastewater are required to obtain permits pursuant to the Clean Water Act. Facilities that produce at least of fish, molluscs or crustaceans a year are subject to specific national discharge standards. Other permitted facilities are subject to effluent limitations that are developed on a case-by-case basis. By country Aquaculture by Country: History The Gunditjmara, the local Aboriginal Australian people in south-western Victoria, Australia, may have raised short-finned eels as early as about 4,580 BCE. Evidence indicates they developed about of volcanic floodplains in the vicinity of Lake Condah into a complex of channels and dams, and used woven traps to capture eels, and preserve them to eat all year round. The Budj Bim Cultural Landscape, a World Heritage Site, is thought to be one of the oldest aquaculture sites in the world. Oral tradition in China tells of the culture of the common carp, Cyprinus carpio, as long ago as 2000–2100 BCE (around 4,000 years BP), but the earliest significant evidence lies in the literature, in the earliest monograph on fish culture called The Classic of Fish Culture, by Fan Li, written around 475 BCE ( BP). Another ancient Chinese guide to aquaculture was by Yang Yu Jing, written around 460 BCE, showing that carp farming was becoming more sophisticated. The Jiahu site in China has circumstantial archeological evidence as possibly the oldest aquaculture locations, dating from 6200BCE (about 8,200 years BP), but this is speculative. When the waters subsided after river floods, some fish, mainly carp, were trapped in lakes. Early aquaculturists fed their brood using nymphs and silkworm faeces, and ate them. Ancient Egyptians might have farmed fish (especially gilt-head bream) from Lake Bardawil about 1,500 BCE (about 3,500 BP), and they traded them with Canaan. Gim cultivation is the oldest aquaculture in Korea. Early cultivation methods used bamboo or oak sticks, which were replaced by newer methods that utilized nets in the 19th century. Floating rafts have been used for mass production since the 1920s. Japanese cultivated seaweed by providing bamboo poles and, later, nets and oyster shells to serve as anchoring surfaces for spores. Romans bred fish in ponds and farmed oysters in coastal lagoons before 100 CE. In central Europe, early Christian monasteries adopted Roman aquacultural practices. Aquaculture spread in Europe during the Middle Ages since away from the seacoasts and the big rivers, fish had to be salted so they did not rot. Improvements in transportation during the 19th century made fresh fish easily available and inexpensive, even in inland areas, making aquaculture less popular. The 15th-century fishponds of the Trebon Basin in the Czech Republic are maintained as a UNESCO World Heritage Site. Hawaiians constructed oceanic fish ponds. A remarkable example is the "Menehune" fishpond dating from at least 1,000 years ago, at Alekoko. Legend says that it was constructed by the mythical Menehune dwarf people. In the first half of the 18th century, German Stephan Ludwig Jacobi experimented with external fertilization of brown trouts and salmon. He wrote an article "Von der künstlichen Erzeugung der Forellen und Lachse" (On the Artificial Production of Trout and Salmon) summarizing his findings, and is regarded as the founder of artificial fish rearing in Europe. By the latter decades of the 18th century, oyster farming had begun in estuaries along the Atlantic Coast of North America. The word aquaculture appeared in an 1855 newspaper article in reference to the harvesting of ice. It also appeared in descriptions of the terrestrial agricultural practise of sub-irrigation in the late 19th century before becoming associated primarily with the cultivation of aquatic plant and animal species. In 1859, Stephen Ainsworth of West Bloomfield, New York, began experiments with brook trout. By 1864, Seth Green had established a commercial fish-hatching operation at Caledonia Springs, near Rochester, New York. By 1866, with the involvement of Dr. W. W. Fletcher of Concord, Massachusetts, artificial fish hatcheries were underway in both Canada and the United States. When the Dildo Island fish hatchery opened in Newfoundland in 1889, it was the largest and most advanced in the world. The word aquaculture was used in descriptions of the hatcheries experiments with cod and lobster in 1890. By the 1920s, the American Fish Culture Company of Carolina, Rhode Island, founded in the 1870s was one of the leading producers of trout. During the 1940s, they had perfected the method of manipulating the day and night cycle of fish so that they could be artificially spawned year around. Californians harvested wild kelp and attempted to manage supply around 1900, later labeling it a wartime resource. See also Agroecology Alligator farm Certification for Aquaculture Professionals Fisheries science Fishery Industrial aquaculture List of commercially important fish species Maggots used as food for fish Oyster farming Recirculating aquaculture system Resource decoupling References Sources podcast GESAMP (2008) Assessment and communication of environmental risks in coastal aquaculture FAO Reports and Studies No 76. Hepburn, J. 2002. Taking Aquaculture Seriously. Organic Farming, Winter 2002 © Soil Association. The Scottish Association for Marine Science and Napier University. 2002. Review and synthesis of the environmental impacts of aquaculture Higginbotham James Piscinae: Artificial Fishponds in Roman Italy University of North Carolina Press (June 1997) Wyban, Carol Araki (1992) Tide and Current: Fishponds of Hawai'I University of Hawaiʻi Press:: Timmons, M.B., Ebeling, J.M., Wheaton, F.W., Summerfelt, S.T., Vinci, B.J., 2002. Recirculating Aquaculture Systems: 2nd edition. Cayuga Aqua Ventures. Free content work Further reading Holmer, Marianne. Aquaculture in the Ecosystem. Dordrecht, Netherlands: Springer, 2008. Molyneaux, Paul. Swimming in Circles: Aquaculture and the End of Wild Oceans. New York: Thunder’s Mouth Press, 2006. Stickney, Robert R. Aquaculture: An Introductory Text. Oxford, UK; Cambridge, MA: CABI Publishing, 2005. World Bank. Changing the Face of the Waters: The Promise and Challenge of Sustainable Aquaculture. Washington, DC: World Bank, 2007. External links Aquaculture topic page from Woods Hole Oceanographic Institution The Coastal Resources Center NOAA aquaculture The University of Hawaiʻi's AquacultureHub Domesticated animals Buildings and structures used to confine animals Sustainable food system

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https://en.wikipedia.org/wiki/Kolmogorov%20complexity

Kolmogorov complexity

In algorithmic information theory (a subfield of computer science and mathematics), the Kolmogorov complexity of an object, such as a piece of text, is the length of a shortest computer program (in a predetermined programming language) that produces the object as output. It is a measure of the computational resources needed to specify the object, and is also known as algorithmic complexity, Solomonoff–Kolmogorov–Chaitin complexity, program-size complexity, descriptive complexity, or algorithmic entropy. It is named after Andrey Kolmogorov, who first published on the subject in 1963 and is a generalization of classical information theory. The notion of Kolmogorov complexity can be used to state and prove impossibility results akin to Cantor's diagonal argument, Gödel's incompleteness theorem, and Turing's halting problem. In particular, no program P computing a lower bound for each text's Kolmogorov complexity can return a value essentially larger than P's own length (see section ); hence no single program can compute the exact Kolmogorov complexity for infinitely many texts. Definition Consider the following two strings of 32 lowercase letters and digits: abababababababababababababababab , and 4c1j5b2p0cv4w1x8rx2y39umgw5q85s7 The first string has a short English-language description, namely "write ab 16 times", which consists of 17 characters. The second one has no obvious simple description (using the same character set) other than writing down the string itself, i.e., "write 4c1j5b2p0cv4w1x8rx2y39umgw5q85s7" which has 38 characters. Hence the operation of writing the first string can be said to have "less complexity" than writing the second. More formally, the complexity of a string is the length of the shortest possible description of the string in some fixed universal description language (the sensitivity of complexity relative to the choice of description language is discussed below). It can be shown that the Kolmogorov complexity of any string cannot be more than a few bytes larger than the length of the string itself. Strings like the abab example above, whose Kolmogorov complexity is small relative to the string's size, are not considered to be complex. The Kolmogorov complexity can be defined for any mathematical object, but for simplicity the scope of this article is restricted to strings. We must first specify a description language for strings. Such a description language can be based on any computer programming language, such as Lisp, Pascal, or Java. If P is a program which outputs a string x, then P is a description of x. The length of the description is just the length of P as a character string, multiplied by the number of bits in a character (e.g., 7 for ASCII). We could, alternatively, choose an encoding for Turing machines, where an encoding is a function which associates to each Turing Machine M a bitstring <M>. If M is a Turing Machine which, on input w, outputs string x, then the concatenated string <M> w is a description of x. For theoretical analysis, this approach is more suited for constructing detailed formal proofs and is generally preferred in the research literature. In this article, an informal approach is discussed. Any string s has at least one description. For example, the second string above is output by the pseudo-code: function GenerateString2() return "4c1j5b2p0cv4w1x8rx2y39umgw5q85s7" whereas the first string is output by the (much shorter) pseudo-code: function GenerateString1() return "ab" × 16 If a description d(s) of a string s is of minimal length (i.e., using the fewest bits), it is called a minimal description of s, and the length of d(s) (i.e. the number of bits in the minimal description) is the Kolmogorov complexity of s, written K(s). Symbolically, K(s) = |d(s)|. The length of the shortest description will depend on the choice of description language; but the effect of changing languages is bounded (a result called the invariance theorem). Invariance theorem Informal treatment There are some description languages which are optimal, in the following sense: given any description of an object in a description language, said description may be used in the optimal description language with a constant overhead. The constant depends only on the languages involved, not on the description of the object, nor the object being described. Here is an example of an optimal description language. A description will have two parts: The first part describes another description language. The second part is a description of the object in that language. In more technical terms, the first part of a description is a computer program (specifically: a compiler for the object's language, written in the description language), with the second part being the input to that computer program which produces the object as output. The invariance theorem follows: Given any description language L, the optimal description language is at least as efficient as L, with some constant overhead. Proof: Any description D in L can be converted into a description in the optimal language by first describing L as a computer program P (part 1), and then using the original description D as input to that program (part 2). The total length of this new description D′ is (approximately): |D′ | = |P| + |D| The length of P is a constant that doesn't depend on D. So, there is at most a constant overhead, regardless of the object described. Therefore, the optimal language is universal up to this additive constant. A more formal treatment Theorem: If K1 and K2 are the complexity functions relative to Turing complete description languages L1 and L2, then there is a constant c – which depends only on the languages L1 and L2 chosen – such that ∀s. −c ≤ K1(s) − K2(s) ≤ c. Proof: By symmetry, it suffices to prove that there is some constant c such that for all strings s K1(s) ≤ K2(s) + c. Now, suppose there is a program in the language L1 which acts as an interpreter for L2: function InterpretLanguage(string p) where p is a program in L2. The interpreter is characterized by the following property: Running InterpretLanguage on input p returns the result of running p. Thus, if P is a program in L2 which is a minimal description of s, then InterpretLanguage(P) returns the string s. The length of this description of s is the sum of The length of the program InterpretLanguage, which we can take to be the constant c. The length of P which by definition is K2(s). This proves the desired upper bound. History and context Algorithmic information theory is the area of computer science that studies Kolmogorov complexity and other complexity measures on strings (or other data structures). The concept and theory of Kolmogorov Complexity is based on a crucial theorem first discovered by Ray Solomonoff, who published it in 1960, describing it in "A Preliminary Report on a General Theory of Inductive Inference" as part of his invention of algorithmic probability. He gave a more complete description in his 1964 publications, "A Formal Theory of Inductive Inference," Part 1 and Part 2 in Information and Control. Andrey Kolmogorov later independently published this theorem in Problems Inform. Transmission in 1965. Gregory Chaitin also presents this theorem in J. ACM – Chaitin's paper was submitted October 1966 and revised in December 1968, and cites both Solomonoff's and Kolmogorov's papers. The theorem says that, among algorithms that decode strings from their descriptions (codes), there exists an optimal one. This algorithm, for all strings, allows codes as short as allowed by any other algorithm up to an additive constant that depends on the algorithms, but not on the strings themselves. Solomonoff used this algorithm and the code lengths it allows to define a "universal probability" of a string on which inductive inference of the subsequent digits of the string can be based. Kolmogorov used this theorem to define several functions of strings, including complexity, randomness, and information. When Kolmogorov became aware of Solomonoff's work, he acknowledged Solomonoff's priority. For several years, Solomonoff's work was better known in the Soviet Union than in the Western World. The general consensus in the scientific community, however, was to associate this type of complexity with Kolmogorov, who was concerned with randomness of a sequence, while Algorithmic Probability became associated with Solomonoff, who focused on prediction using his invention of the universal prior probability distribution. The broader area encompassing descriptional complexity and probability is often called Kolmogorov complexity. The computer scientist Ming Li considers this an example of the Matthew effect: "...to everyone who has, more will be given..." There are several other variants of Kolmogorov complexity or algorithmic information. The most widely used one is based on self-delimiting programs, and is mainly due to Leonid Levin (1974). An axiomatic approach to Kolmogorov complexity based on Blum axioms (Blum 1967) was introduced by Mark Burgin in the paper presented for publication by Andrey Kolmogorov. Basic results In the following discussion, let K(s) be the complexity of the string s. It is not hard to see that the minimal description of a string cannot be too much larger than the string itself — the program GenerateString2 above that outputs s is a fixed amount larger than s. Theorem: There is a constant c such that ∀s. K(s) ≤ |s| + c. Uncomputability of Kolmogorov complexity A naive attempt at a program to compute K At first glance it might seem trivial to write a program which can compute K(s) for any s, such as the following: function KolmogorovComplexity(string s) for i = 1 to infinity: for each string p of length exactly i if isValidProgram(p) and evaluate(p) == s return i This program iterates through all possible programs (by iterating through all possible strings and only considering those which are valid programs), starting with the shortest. Each program is executed to find the result produced by that program, comparing it to the input s. If the result matches then the length of the program is returned. However this will not work because some of the programs p tested will not terminate, e.g. if they contain infinite loops. There is no way to avoid all of these programs by testing them in some way before executing them due to the non-computability of the halting problem. What is more, no program at all can compute the function K, be it ever so sophisticated. This is proven in the following. Formal proof of uncomputability of K Theorem: There exist strings of arbitrarily large Kolmogorov complexity. Formally: for each natural number n, there is a string s with K(s) ≥ n. Proof: Otherwise all of the infinitely many possible finite strings could be generated by the finitely many programs with a complexity below n bits. Theorem: K is not a computable function. In other words, there is no program which takes any string s as input and produces the integer K(s) as output. The following proof by contradiction uses a simple Pascal-like language to denote programs; for sake of proof simplicity assume its description (i.e. an interpreter) to have a length of bits. Assume for contradiction there is a program function KolmogorovComplexity(string s) which takes as input a string s and returns K(s). All programs are of finite length so, for sake of proof simplicity, assume it to be bits. Now, consider the following program of length bits: function GenerateComplexString() for i = 1 to infinity: for each string s of length exactly i if KolmogorovComplexity(s) ≥ 8000000000 return s Using KolmogorovComplexity as a subroutine, the program tries every string, starting with the shortest, until it returns a string with Kolmogorov complexity at least bits, i.e. a string that cannot be produced by any program shorter than bits. However, the overall length of the above program that produced s is only bits, which is a contradiction. (If the code of KolmogorovComplexity is shorter, the contradiction remains. If it is longer, the constant used in GenerateComplexString can always be changed appropriately.) The above proof uses a contradiction similar to that of the Berry paradox: "The smallest positive integer that cannot be defined in fewer than twenty English words". It is also possible to show the non-computability of K by reduction from the non-computability of the halting problem H, since K and H are Turing-equivalent. There is a corollary, humorously called the "full employment theorem" in the programming language community, stating that there is no perfect size-optimizing compiler. Chain rule for Kolmogorov complexity The chain rule for Kolmogorov complexity states that K(X,Y) = K(X) + K(Y|X) + O(log(K(X,Y))). It states that the shortest program that reproduces X and Y is no more than a logarithmic term larger than a program to reproduce X and a program to reproduce Y given X. Using this statement, one can define an analogue of mutual information for Kolmogorov complexity. Compression It is straightforward to compute upper bounds for K(s) – simply compress the string s with some method, implement the corresponding decompressor in the chosen language, concatenate the decompressor to the compressed string, and measure the length of the resulting string – concretely, the size of a self-extracting archive in the given language. A string s is compressible by a number c if it has a description whose length does not exceed |s| − c bits. This is equivalent to saying that K(s) ≤ |s| − c. Otherwise, s is incompressible by c. A string incompressible by 1 is said to be simply incompressible – by the pigeonhole principle, which applies because every compressed string maps to only one uncompressed string, incompressible strings must exist, since there are 2n bit strings of length n, but only 2n − 1 shorter strings, that is, strings of length less than n, (i.e. with length 0, 1, ..., n − 1). For the same reason, most strings are complex in the sense that they cannot be significantly compressed – their K(s) is not much smaller than |s|, the length of s in bits. To make this precise, fix a value of n. There are 2n bitstrings of length n. The uniform probability distribution on the space of these bitstrings assigns exactly equal weight 2−n to each string of length n. Theorem: With the uniform probability distribution on the space of bitstrings of length n, the probability that a string is incompressible by c is at least 1 − 2−c+1 + 2−n. To prove the theorem, note that the number of descriptions of length not exceeding n − c is given by the geometric series: 1 + 2 + 22 + ... + 2n − c = 2n−c+1 − 1. There remain at least 2n − 2n−c+1 + 1 bitstrings of length n that are incompressible by c. To determine the probability, divide by 2n. Chaitin's incompleteness theorem By the above theorem (), most strings are complex in the sense that they cannot be described in any significantly "compressed" way. However, it turns out that the fact that a specific string is complex cannot be formally proven, if the complexity of the string is above a certain threshold. The precise formalization is as follows. First, fix a particular axiomatic system S for the natural numbers. The axiomatic system has to be powerful enough so that, to certain assertions A about complexity of strings, one can associate a formula FA in S. This association must have the following property: If FA is provable from the axioms of S, then the corresponding assertion A must be true. This "formalization" can be achieved based on a Gödel numbering. Theorem: There exists a constant L (which only depends on S and on the choice of description language) such that there does not exist a string s for which the statementK(s) ≥ L       (as formalized in S) can be proven within S. Proof Idea: The proof of this result is modeled on a self-referential construction used in Berry's paradox. We firstly obtain a program which enumerates the proofs within S and we specify a procedure P which takes as an input an integer L and prints the strings x which are within proofs within S of the statement K(x) ≥ L. By then setting L to greater than the length of this procedure P, we have that the required length of a program to print x as stated in K(x) ≥ L as being at least L is then less than the amount L since the string x was printed by the procedure P. This is a contradiction. So it is not possible for the proof system S to prove K(x) ≥ L for L arbitrarily large, in particular, for L larger than the length of the procedure P, (which is finite). Proof: We can find an effective enumeration of all the formal proofs in S by some procedure function NthProof(int n) which takes as input n and outputs some proof. This function enumerates all proofs. Some of these are proofs for formulas we do not care about here, since every possible proof in the language of S is produced for some n. Some of these are complexity formulas of the form K(s) ≥ n where s and n are constants in the language of S. There is a procedure function NthProofProvesComplexityFormula(int n) which determines whether the nth proof actually proves a complexity formula K(s) ≥ L. The strings s, and the integer L in turn, are computable by procedure: function StringNthProof(int n) function ComplexityLowerBoundNthProof(int n) Consider the following procedure: function GenerateProvablyComplexString(int n) for i = 1 to infinity: if NthProofProvesComplexityFormula(i) and ComplexityLowerBoundNthProof(i) ≥ n return StringNthProof(i) Given an n, this procedure tries every proof until it finds a string and a proof in the formal system S of the formula K(s) ≥ L for some L ≥ n; if no such proof exists, it loops forever. Finally, consider the program consisting of all these procedure definitions, and a main call: GenerateProvablyComplexString(n0) where the constant n0 will be determined later on. The overall program length can be expressed as U+log2(n0), where U is some constant and log2(n0) represents the length of the integer value n0, under the reasonable assumption that it is encoded in binary digits. We will choose n0 to be greater than the program length, that is, such that n0 > U+log2(n0). This is clearly true for n0 sufficiently large, because the left hand side grows linearly in n0 whilst the right hand side grows logarithmically in n0 up to the fixed constant U. Then no proof of the form "K(s)≥L" with L≥n0 can be obtained in S, as can be seen by an indirect argument: If ComplexityLowerBoundNthProof(i) could return a value ≥n0, then the loop inside GenerateProvablyComplexString would eventually terminate, and that procedure would return a string s such that This is a contradiction, Q.E.D. As a consequence, the above program, with the chosen value of n0, must loop forever. Similar ideas are used to prove the properties of Chaitin's constant. Minimum message length The minimum message length principle of statistical and inductive inference and machine learning was developed by C.S. Wallace and D.M. Boulton in 1968. MML is Bayesian (i.e. it incorporates prior beliefs) and information-theoretic. It has the desirable properties of statistical invariance (i.e. the inference transforms with a re-parametrisation, such as from polar coordinates to Cartesian coordinates), statistical consistency (i.e. even for very hard problems, MML will converge to any underlying model) and efficiency (i.e. the MML model will converge to any true underlying model about as quickly as is possible). C.S. Wallace and D.L. Dowe (1999) showed a formal connection between MML and algorithmic information theory (or Kolmogorov complexity). Kolmogorov randomnessKolmogorov randomness defines a string (usually of bits) as being random if and only if every computer program that can produce that string is at least as long as the string itself. To make this precise, a universal computer (or universal Turing machine) must be specified, so that "program" means a program for this universal machine. A random string in this sense is "incompressible" in that it is impossible to "compress" the string into a program that is shorter than the string itself. For every universal computer, there is at least one algorithmically random string of each length. Whether a particular string is random, however, depends on the specific universal computer that is chosen. This is because a universal computer can have a particular string hard-coded in itself, and a program running on this universal computer can then simply refer to this hard-coded string using a short sequence of bits (i.e. much shorter than the string itself). This definition can be extended to define a notion of randomness for infinite sequences from a finite alphabet. These algorithmically random sequences can be defined in three equivalent ways. One way uses an effective analogue of measure theory; another uses effective martingales. The third way defines an infinite sequence to be random if the prefix-free Kolmogorov complexity of its initial segments grows quickly enough — there must be a constant c such that the complexity of an initial segment of length n is always at least n−c. This definition, unlike the definition of randomness for a finite string, is not affected by which universal machine is used to define prefix-free Kolmogorov complexity. Relation to entropy For dynamical systems, entropy rate and algorithmic complexity of the trajectories are related by a theorem of Brudno, that the equality holds for almost all . It can be shown that for the output of Markov information sources, Kolmogorov complexity is related to the entropy of the information source. More precisely, the Kolmogorov complexity of the output of a Markov information source, normalized by the length of the output, converges almost surely (as the length of the output goes to infinity) to the entropy of the source. Conditional versions The conditional Kolmogorov complexity of two strings is, roughly speaking, defined as the Kolmogorov complexity of x given y as an auxiliary input to the procedure. There is also a length-conditional complexity , which is the complexity of x given the length of x'' as known/input. See also Berry paradox Code golf Data compression Descriptive complexity theory Grammar induction Inductive reasoning Kolmogorov structure function Levenshtein distance Solomonoff's theory of inductive inference Sample entropy Notes References Further reading External links The Legacy of Andrei Nikolaevich Kolmogorov Chaitin's online publications Solomonoff's IDSIA page Generalizations of algorithmic information by J. Schmidhuber Tromp's lambda calculus computer model offers a concrete definition of K()] Universal AI based on Kolmogorov Complexity by M. Hutter: David Dowe's Minimum Message Length (MML) and Occam's razor pages. Computability theory Descriptive complexity Measures of complexity Computational complexity theory

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https://en.wikipedia.org/wiki/Alfred%20the%20Great

Alfred the Great

Alfred the Great (also spelled Ælfred; – 26 October 899) was King of the West Saxons from 871 to 886, and King of the Anglo-Saxons from 886 until his death in 899. He was the youngest son of King Æthelwulf and his first wife Osburh, who both died when Alfred was young. Three of Alfred's brothers, Æthelbald, Æthelberht and Æthelred, reigned in turn before him. Under Alfred's rule, considerable administrative and military reforms were introduced, prompting lasting change in England. After ascending the throne, Alfred spent several years fighting Viking invasions. He won a decisive victory in the Battle of Edington in 878 and made an agreement with the Vikings, dividing England between Anglo-Saxon territory and the Viking-ruled Danelaw, composed of Scandinavian York, the north-east Midlands and East Anglia. Alfred also oversaw the conversion of Viking leader Guthrum to Christianity. He defended his kingdom against the Viking attempt at conquest, becoming the dominant ruler in England. Alfred began styling himself as "King of the Anglo-Saxons" after reoccupying London from the Vikings. Details of his life are described in a work by 9th-century Welsh scholar and bishop Asser. Alfred had a reputation as a learned and merciful man of a gracious and level-headed nature who encouraged education, proposing that primary education be conducted in English, rather than Latin, and improving the legal system and military structure and his people's quality of life. He was given the epithet "the Great" in the 16th century and is the only English monarch to be labelled as such. Family Alfred was a son of Æthelwulf, king of Wessex, and his wife Osburh. According to his biographer, Asser, writing in 893, "In the year of our Lord's Incarnation 849 Alfred, King of the Anglo-Saxons", was born at the royal estate called Wantage, in the district known as Berkshire (which is so called from Berroc Wood, where the box tree grows very abundantly)." This date has been accepted by the editors of Asser's biography, Simon Keynes and Michael Lapidge, and by other historians such as David Dumville and Richard Huscroft. West Saxon genealogical lists state that Alfred was 23 when he became king in April 871, implying that he was born between April 847 and April 848. This dating is adopted in the biography of Alfred by Alfred Smyth, who regards Asser's biography as fraudulent, an allegation which is rejected by other historians. Richard Abels in his biography discusses both sources but does not decide between them and dates Alfred's birth as 847/849, while Patrick Wormald in his Oxford Dictionary of National Biography article dates it 848/849. Berkshire had been historically disputed between Wessex and the midland kingdom of Mercia, and as late as 844, a charter showed that it was part of Mercia, but Alfred's birth in the county is evidence that, by the late 840s, control had passed to Wessex. He was the youngest of six children. His eldest brother, Æthelstan, was old enough to be appointed sub-king of Kent in 839, almost 10 years before Alfred was born. He died in the early 850s. Alfred's next three brothers were successively kings of Wessex. Æthelbald (858–60) and Æthelberht (860–65) were also much older than Alfred, but Æthelred (865–71) was only a year or two older. Alfred's only known sister, Æthelswith, married Burgred, king of Mercia in 853. Most historians think that Osburh was the mother of all Æthelwulf's children, but some suggest that the older ones were born to an unrecorded first wife. Osburh was descended from the rulers of the Isle of Wight. She was described by Alfred's biographer Asser as "a most religious woman, noble by temperament and noble by birth". She had died by 856 when Æthelwulf married Judith, daughter of Charles the Bald, king of West Francia. In 868, Alfred married Ealhswith, daughter of the Mercian nobleman Æthelred Mucel, ealdorman of the Gaini, and his wife Eadburh, who was of royal Mercian descent. Their children were Æthelflæd, who married Æthelred, Lord of the Mercians; Edward the Elder, Alfred's successor as king; Æthelgifu, abbess of Shaftesbury; Ælfthryth, who married Baldwin, count of Flanders; and Æthelweard. Background Alfred's grandfather, Ecgberht, became king of Wessex in 802, and in the view of the historian Richard Abels, it must have seemed very unlikely to contemporaries that he would establish a lasting dynasty. For 200 years, three families had fought for the West Saxon throne, and no son had followed his father as king. No ancestor of Ecgberht had been a king of Wessex since Ceawlin in the late sixth century, but he was believed to be a paternal descendant of Cerdic, the founder of the West Saxon dynasty. This made Ecgberht an ætheling – a prince eligible for the throne. But after Ecgberht's reign, descent from Cerdic was no longer sufficient to make a man an ætheling. When Ecgberht died in 839, he was succeeded by his son Æthelwulf; all subsequent West Saxon kings were descendants of Ecgberht and Æthelwulf, and were also sons of kings. At the beginning of the ninth century, England was almost wholly under the control of the Anglo-Saxons. Mercia dominated southern England, but its supremacy came to an end in 825 when it was decisively defeated by Ecgberht at the Battle of Ellendun. The two kingdoms became allies, which was important in the resistance to Viking attacks. In 853, King Burgred of Mercia requested West Saxon help to suppress a Welsh rebellion, and Æthelwulf led a West Saxon contingent in a successful joint campaign. In the same year Burgred married Æthelwulf's daughter, Æthelswith. In 825, Ecgberht sent Æthelwulf to invade the Mercian sub-kingdom of Kent, and its sub-king, Baldred, was driven out shortly afterwards. By 830, Essex, Surrey and Sussex had submitted to Ecgberht, and he had appointed Æthelwulf to rule the south-eastern territories as king of Kent. The Vikings ravaged the Isle of Sheppey in 835, and the following year they defeated Ecgberht at Carhampton in Somerset, but in 838 he was victorious over an alliance of Cornishmen and Vikings at the Battle of Hingston Down, reducing Cornwall to the status of a client kingdom. When Æthelwulf succeeded, he appointed his eldest son Æthelstan as sub-king of Kent. Ecgberht and Æthelwulf may not have intended a permanent union between Wessex and Kent because they both appointed sons as sub-kings, and charters in Wessex were attested (witnessed) by West Saxon magnates, while Kentish charters were witnessed by the Kentish elite; both kings kept overall control, and the sub-kings were not allowed to issue their own coinage. Viking raids increased in the early 840s on both sides of the English Channel, and in 843 Æthelwulf was defeated at Carhampton. In 850, Æthelstan defeated a Danish fleet off Sandwich in the first recorded naval battle in English history. In 851 Æthelwulf and his second son, Æthelbald, defeated the Vikings at the Battle of Aclea and, according to the Anglo-Saxon Chronicle, "there made the greatest slaughter of a heathen raiding-army that we have heard tell of up to this present day, and there took the victory". Æthelwulf died in 858 and was succeeded by his oldest surviving son, Æthelbald, as king of Wessex and by his next oldest son, Æthelberht, as king of Kent. Æthelbald only survived his father by two years, and Æthelberht then for the first time united Wessex and Kent into a single kingdom. Childhood According to Asser, in his childhood Alfred won a beautifully decorated book of English poetry, offered as a prize by his mother to the first of her sons able to memorise it. He must have had it read to him because his mother died when he was about six and he did not learn to read until he was 12. In 853, Alfred is reported by the Anglo-Saxon Chronicle to have been sent to Rome where he was confirmed by Pope Leo IV, who "anointed him as king". Victorian writers later interpreted this as an anticipatory coronation in preparation for his eventual succession to the throne of Wessex. This is unlikely; his succession could not have been foreseen at the time because Alfred had three living elder brothers. A letter of Leo IV shows that Alfred was made a "consul" and a misinterpretation of this investiture, deliberate or accidental, could explain later confusion. It may be based upon the fact that Alfred later accompanied his father on a pilgrimage to Rome where he spent some time at the court of Charles the Bald, king of the Franks, around 854–855. On their return from Rome in 856, Æthelwulf was deposed by his son Æthelbald. With civil war looming, the magnates of the realm met in council to form a compromise. Æthelbald retained the western shires (i.e. historical Wessex), and Æthelwulf ruled in the east. After King Æthelwulf died in 858, Wessex was ruled by three of Alfred's brothers in succession: Æthelbald, Æthelberht and Æthelred. The reigns of Alfred's brothers Alfred is not mentioned during the short reigns of his older brothers Æthelbald and Æthelberht. The Anglo-Saxon Chronicle describes the Great Heathen Army of Danes landing in East Anglia with the intent of conquering the four kingdoms which constituted Anglo-Saxon England in 865. Alfred's public life began in 865 at age 16 with the accession of his third brother, 18-year-old Æthelred. During this period, Bishop Asser gave Alfred the unique title of secundarius, which may indicate a position similar to the Celtic tanist, a recognised successor closely associated with the reigning monarch. This arrangement may have been sanctioned by Alfred's father or by the Witan to guard against the danger of a disputed succession should Æthelred fall in battle. It was a well known tradition among other Germanic peoples – such as the Swedes and Franks to whom the Anglo-Saxons were closely related – to crown a successor as royal prince and military commander. Viking invasion In 868, Alfred was recorded as fighting beside Æthelred in a failed attempt to keep the Great Heathen Army led by Ivar the Boneless out of the adjoining Kingdom of Mercia. The Danes arrived in his homeland at the end of 870, and nine engagements were fought in the following year, with mixed results; the places and dates of two of these battles have not been recorded. A successful skirmish at the Battle of Englefield in Berkshire on 31 December 870 was followed by a severe defeat at the siege and the Battle of Reading by Ivar's brother Halfdan Ragnarsson on 5 January 871. Four days later, the Anglo-Saxons won a victory at the Battle of Ashdown on the Berkshire Downs, possibly near Compton or Aldworth. The Saxons were defeated at the Battle of Basing on 22 January. They were defeated again on 22 March at the Battle of Merton (perhaps Marden in Wiltshire or Martin in Dorset). Æthelred died shortly afterwards in April. King at war Early struggles In April 871 King Æthelred died and Alfred acceded to the throne of Wessex and the burden of its defence, even though Æthelred left two under-age sons, Æthelhelm and Æthelwold. This was in accordance with the agreement that Æthelred and Alfred had made earlier that year in an assembly at an unidentified place called Swinbeorg. The brothers had agreed that whichever of them outlived the other would inherit the personal property that King Æthelwulf had left jointly to his sons in his will. The deceased's sons would receive only whatever property and riches their father had settled upon them and whatever additional lands their uncle had acquired. The unstated premise was that the surviving brother would be king. Given the Danish invasion and the youth of his nephews, Alfred's accession probably went uncontested. While he was busy with the burial ceremonies for his brother, the Danes defeated the Saxon army in his absence at an unnamed spot and then again in his presence at Wilton in May. The defeat at Wilton smashed any remaining hope that Alfred could drive the invaders from his kingdom. Alfred was forced instead to make peace with them. Although the terms of the peace are not recorded, Bishop Asser wrote that the pagans agreed to vacate the realm and made good their promise. The Viking army withdrew from Reading in the autumn of 871 to take up winter quarters in Mercian London. Although not mentioned by Asser or by the Anglo-Saxon Chronicle, Alfred probably paid the Vikings silver to leave, much as the Mercians were to do in the following year. Hoards dating to the Viking occupation of London in 871/872 have been excavated at Croydon, Gravesend and Waterloo Bridge. These finds hint at the cost involved in making peace with the Vikings. For the next five years, the Danes occupied other parts of England. In 876, under Guthrum, Oscetel and Anwend, the Danes slipped past the Saxon army and attacked and occupied Wareham in Dorset. Alfred blockaded them but was unable to take Wareham by assault. He negotiated a peace that involved an exchange of hostages and oaths, which the Danes swore on a "holy ring" associated with the worship of Thor. The Danes broke their word, and after killing all the hostages, slipped away under cover of night to Exeter in Devon. Alfred blockaded the Viking ships in Devon, and with a relief fleet having been scattered by a storm, the Danes were forced to submit. The Danes withdrew to Mercia. In January 878, the Danes made a sudden attack on Chippenham, a royal stronghold in which Alfred had been staying over Christmas "and most of the people they killed, except the King Alfred, and he with a little band made his way by wood and swamp, and after Easter he made a fort at Athelney in the marshes of Somerset, and from that fort kept fighting against the foe". From his fort at Athelney, an island in the marshes near North Petherton, Alfred was able to mount a resistance campaign, rallying the local militias from Somerset, Wiltshire and Hampshire. 878 was the nadir of the history of the Anglo-Saxon kingdoms. With all the other kingdoms having fallen to the Vikings, Wessex alone was resisting. The cake legend A legend tells how when Alfred first fled to the Somerset Levels, he was given shelter by a peasant woman who, unaware of his identity, left him to watch some wheaten cakes she had left cooking on the fire. Preoccupied with the problems of his kingdom, Alfred accidentally let the cakes burn and was roundly scolded by the woman upon her return. There is no contemporary evidence for the legend, but it is possible that there was an early oral tradition. The first known written account of the incident is from about 100 years after Alfred's death. Counter-attack and victory In the seventh week after Easter (4–10 May 878), around Whitsuntide, Alfred rode to Egbert's Stone east of Selwood where he was met by "all the people of Somerset and of Wiltshire and of that part of Hampshire which is on this side of the sea (that is, west of Southampton Water), and they rejoiced to see him". Alfred's emergence from his marshland stronghold was part of a carefully planned offensive that entailed raising the fyrds of three shires. This meant not only that the king had retained the loyalty of ealdormen, royal reeves and king's thegns, who were charged with levying and leading these forces, but that they had maintained their positions of authority in these localities well enough to answer his summons to war. Alfred's actions also suggest a system of scouts and messengers. Alfred won a decisive victory in the ensuing Battle of Edington which may have been fought near Westbury, Wiltshire. He then pursued the Danes to their stronghold at Chippenham and starved them into submission. One of the terms of the surrender was that Guthrum convert to Christianity. Three weeks later, the Danish king and 29 of his chief men were baptised at Alfred's court at Aller, near Athelney, with Alfred receiving Guthrum as his spiritual son. According to Asser, At Wedmore, Alfred and Guthrum negotiated what some historians have called the Treaty of Wedmore, but it was to be some years after the cessation of hostilities that a formal treaty was signed. Under the terms of the so-called Treaty of Wedmore, the converted Guthrum was required to leave Wessex and return to East Anglia. Consequently, in 879 the Viking army left Chippenham and made its way to Cirencester. The formal Treaty of Alfred and Guthrum, preserved in Old English in Corpus Christi College, Cambridge (Manuscript 383), and in a Latin compilation known as Quadripartitus, was negotiated later, perhaps in 879 or 880, when King Ceolwulf II of Mercia was deposed. That treaty divided up the kingdom of Mercia. By its terms, the boundary between Alfred's and Guthrum's kingdoms was to run up the River Thames to the River Lea, follow the Lea to its source (near Luton), from there extend in a straight line to Bedford, and from Bedford follow the River Ouse to Watling Street. Alfred succeeded to Ceolwulf's kingdom consisting of western Mercia, and Guthrum incorporated the eastern part of Mercia into an enlarged Kingdom of East Anglia (henceforward known as the Danelaw). By terms of the treaty, moreover, Alfred was to have control over the Mercian city of London and its mints—at least for the time being. In 825, the Anglo-Saxon Chronicle had recorded that the people of Essex, Sussex, Kent and Surrey surrendered to Egbert, Alfred's grandfather. From then until the arrival of the Great Heathen Army, Essex had formed part of Wessex. After the foundation of Danelaw, it appears that some of Essex would have been ceded to the Danes, but how much is not clear. 880s With the signing of the Treaty of Alfred and Guthrum, an event most commonly held to have taken place around 880 when Guthrum's people began settling East Anglia, Guthrum was neutralised as a threat. The Viking army, which had stayed at Fulham during the winter of 878–879, sailed for Ghent and was active on the continent from 879 to 892. There were local raids on the coast of Wessex throughout the 880s. In 882, Alfred fought a small sea battle against four Danish ships. Two of the ships were destroyed, and the others surrendered. This was one of four sea battles recorded in the Anglo-Saxon Chronicle, three of which involved Alfred. Similar small skirmishes with independent Viking raiders would have occurred for much of the period as they had for decades. In 883, Pope Marinus exempted the Saxon quarter in Rome from taxation, probably in return for Alfred's promise to send alms annually to Rome, which may be the origin of the medieval tax called Peter's Pence. The pope sent gifts to Alfred, including what was reputed to be a piece of the True Cross. After the signing of the treaty with Guthrum, Alfred was spared any large-scale conflicts for some time. Despite this relative peace, the king was forced to deal with a number of Danish raids and incursions. Among these was a raid in Kent, an allied kingdom in South East England, during the year 885, which was possibly the largest raid since the battles with Guthrum. Asser's account of the raid places the Danish raiders at the Saxon city of Rochester, where they built a temporary fortress in order to besiege the city. In response to this incursion, Alfred led an Anglo-Saxon force against the Danes who, instead of engaging the army of Wessex, fled to their beached ships and sailed to another part of Britain. The retreating Danish force supposedly left Britain the following summer. Not long after the failed Danish raid in Kent, Alfred dispatched his fleet to East Anglia. The purpose of this expedition is debated, but Asser claims that it was for the sake of plunder. After travelling up the River Stour, the fleet was met by Danish vessels that numbered 13 or 16 (sources vary on the number), and a battle ensued. The Anglo-Saxon fleet emerged victorious, and as Henry of Huntingdon writes, "laden with spoils". The victorious fleet was surprised when attempting to leave the River Stour and was attacked by a Danish force at the mouth of the river. The Danish fleet defeated Alfred's fleet, which may have been weakened in the previous engagement. King of the Anglo-Saxons A year later, in 886, Alfred reoccupied the city of London and set out to make it habitable again. Alfred entrusted the city to the care of his son-in-law Æthelred, ealdorman of Mercia. Soon afterwards, Alfred restyled himself as "King of the Anglo-Saxons". The restoration of London progressed through the latter half of the 880s and is believed to have revolved around a new street plan; added fortifications in addition to the existing Roman walls; and, some believe, the construction of matching fortifications on the south bank of the River Thames. This is also the period in which almost all chroniclers agree that the Saxon people of pre-unification England submitted to Alfred. In 888, Æthelred, the archbishop of Canterbury, also died. One year later Guthrum, or Athelstan by his baptismal name, Alfred's former enemy and king of East Anglia, died and was buried in Hadleigh, Suffolk. Guthrum's death changed the political landscape for Alfred. The resulting power vacuum stirred other power-hungry warlords eager to take his place in the following years. Viking attacks (890s) After another lull, in the autumn of 892 or 893, the Danes attacked again. Finding their position in mainland Europe precarious, they crossed to England in 330 ships in two divisions. They entrenched themselves, the larger body at Appledore, Kent, and the lesser under Hastein, at Milton, also in Kent. The invaders brought their wives and children with them, indicating a meaningful attempt at conquest and colonisation. Alfred, in 893 or 894, took up a position from which he could observe both forces. While he was in talks with Hastein, the Danes at Appledore broke out and struck north-westwards. They were overtaken by Alfred's eldest son Edward, and were defeated at the Battle of Farnham in Surrey. They took refuge on an island at Thorney, on the River Colne between Buckinghamshire and Middlesex, where they were blockaded and forced to give hostages and promise to leave Wessex. They then went to Essex and after suffering another defeat at Benfleet, joined with Hastein's force at Shoebury. Alfred had been on his way to relieve his son at Thorney when he heard that the Northumbrian and East Anglian Danes were besieging Exeter and an unnamed stronghold on the North Devon shore. Alfred at once hurried westward and raised the Siege of Exeter. The fate of the other place is not recorded. The force under Hastein set out to march up the Thames Valley, possibly with the idea of assisting their friends in the west. They were met by a large force under the three great ealdormen of Mercia, Wiltshire and Somerset and forced to head off to the north-west, being finally overtaken and blockaded at Buttington. (Some identify this with Buttington Tump at the mouth of the River Wye, others with Buttington near Welshpool.) An attempt to break through the English lines failed. Those who escaped retreated to Shoebury. After collecting reinforcements, they made a sudden dash across England and occupied the ruined Roman walls of Chester. The English did not attempt a winter blockade but contented themselves with destroying all the supplies in the district. Early in 894 or 895 lack of food obliged the Danes to retire once more to Essex. At the end of the year, the Danes drew their ships up the River Thames and the River Lea and fortified themselves north of London. A frontal attack on the Danish lines failed but later in the year, Alfred saw a means of obstructing the river to prevent the egress of the Danish ships. The Danes realised that they were outmanoeuvred, struck off north-westwards and wintered at Cwatbridge near Bridgnorth. The next year, 896 (or 897), they gave up the struggle. Some retired to Northumbria, some to East Anglia. Those who had no connections in England returned to the continent. Military reorganisation The Germanic tribes who invaded Britain in the fifth and sixth centuries relied upon the unarmoured infantry supplied by their tribal levy, or fyrd, and it was upon this system that the military power of the several kingdoms of early Anglo-Saxon England depended. The fyrd was a local militia in the Anglo-Saxon shire in which all freemen had to serve; those who refused military service were subject to fines or loss of their land. According to the law code of King Ine of Wessex, issued in , Wessex's history of failures preceding Alfred's success in 878 emphasised to him that the traditional system of battle he had inherited played to the Danes' advantage. While the Anglo-Saxons and the Danes attacked settlements for plunder, they employed different tactics. In their raids the Anglo-Saxons traditionally preferred to attack head-on by assembling their forces in a shield wall, advancing against their target and overcoming the oncoming wall marshalled against them in defence. The Danes preferred to choose easy targets, mapping cautious forays to avoid risking their plunder with high-stake attacks for more. Alfred determined their tactic was to launch small attacks from a secure base to which they could retreat should their raiders meet strong resistance. The bases were prepared in advance, often by capturing an estate and augmenting its defences with ditches, ramparts and palisades. Once inside the fortification, Alfred realised, the Danes enjoyed the advantage, better situated to outlast their opponents or crush them with a counter-attack because the provisions and stamina of the besieging forces waned. The means by which the Anglo-Saxons marshalled forces to defend against marauders also left them vulnerable to the Vikings. It was the responsibility of the shire fyrd to deal with local raids. The king could call up the national militia to defend the kingdom but in the case of the Viking raids, problems with communication and raising supplies meant that the national militia could not be mustered quickly enough. It was only after the raids had begun that a call went out to landowners to gather their men for battle. Large regions could be devastated before the fyrd could assemble and arrive. Although the landowners were obliged to the king to supply these men when called, during the attacks in 878 many of them abandoned their king and collaborated with Guthrum. With these lessons in mind Alfred capitalised on the relatively peaceful years following his victory at Edington with an ambitious restructuring of Saxon defences. On a trip to Rome Alfred had stayed with Charles the Bald, and it is possible that he may have studied how the Carolingian kings had dealt with Viking raiders. Learning from their experiences he was able to establish a system of taxation and defence for Wessex. There had been a system of fortifications in pre-Viking Mercia that may have been an influence. When the Viking raids resumed in 892 Alfred was better prepared to confront them with a standing, mobile field army, a network of garrisons and a small fleet of ships navigating the rivers and estuaries. Administration and taxation Tenants in Anglo-Saxon England had a threefold obligation based on their landholding: the so-called "common burdens" of military service, fortress work, and bridge repair. This threefold obligation has traditionally been called trinoda necessitas or trimoda necessitas. The Old English name for the fine due for neglecting military service was . To maintain the burhs, and to reorganise the fyrd as a standing army, Alfred expanded the tax and conscription system based on the productivity of a tenant's landholding. The hide was the basic unit of the system on which the tenant's public obligations were assessed. A hide is thought to represent the amount of land required to support one family. The hide differed in size according to the value and resources of the land and the landowner would have to provide service based on how many hides he owned. Burghal system The foundation of Alfred's new military defence system was a network of burhs, distributed at tactical points throughout the kingdom. There were thirty-three burhs, about apart, enabling the military to confront attacks anywhere in the kingdom within a day. Alfred's burhs (of which 22 developed into boroughs) ranged from former Roman towns, such as Winchester, where the stone walls were repaired and ditches added, to massive earthen walls surrounded by wide ditches, probably reinforced with wooden revetments and palisades, such as at Burpham in West Sussex. The size of the burhs ranged from tiny outposts such as Pilton in Devon, to large fortifications in established towns, the largest being at Winchester. A document now known as the Burghal Hidage provides an insight into how the system worked. It lists the hidage for each of the fortified towns contained in the document. Wallingford had a hidage of 2,400, which meant that the landowners there were responsible for supplying and feeding 2,400 men, the number sufficient for maintaining of wall. A total of 27,071 soldiers were needed, approximately one in four of all the free men in Wessex. Many of the burhs were twin towns that straddled a river and were connected by a fortified bridge, like those built by Charles the Bald a generation before. The double-burh blocked passage on the river, forcing Viking ships to navigate under a garrisoned bridge lined with men armed with stones, spears or arrows. Other burhs were sited near fortified royal villas, allowing the king better control over his strongholds. The burhs were connected by a road system maintained for army use (known as herepaths). The roads allowed an army quickly to be assembled, sometimes from more than one burh, to confront the Viking invader. The road network posed significant obstacles to Viking invaders, especially those laden with booty. The system threatened Viking routes and communications making it far more dangerous for them. The Vikings lacked the equipment for a siege against a burh and a developed doctrine of siegecraft, having tailored their methods of fighting to rapid strikes and unimpeded retreats to well-defended fortifications. The only means left to them was to starve the burh into submission but this gave the king time to send his field army or garrisons from neighbouring burhs along the army roads. In such cases, the Vikings were extremely vulnerable to pursuit by the king's joint military forces. Alfred's burh system posed such a formidable challenge against Viking attack that when the Vikings returned in 892 and stormed a half-built, poorly garrisoned fortress up the Lympne estuary in Kent, the Anglo-Saxons were able to limit their penetration to the outer frontiers of Wessex and Mercia. Alfred's burghal system was revolutionary in its strategic conception and potentially expensive in its execution. His contemporary biographer Asser wrote that many nobles balked at the demands placed upon them even though they were for "the common needs of the kingdom". English navy Alfred also tried his hand at naval design. In 896 he ordered the construction of a small fleet, perhaps a dozen or so longships that, at 60 oars, were twice the size of Viking warships. This was not, as the Victorians asserted, the birth of the English Navy. Wessex had possessed a royal fleet before this. Alfred's older brother sub-king Æthelstan of Kent and Ealdorman Ealhhere had defeated a Viking fleet in 851 capturing nine ships and Alfred had conducted naval actions in 882. The year 897 marked an important development in the naval power of Wessex. The author of the Anglo-Saxon Chronicle related that Alfred's ships were larger, swifter, steadier and rode higher in the water than either Danish or Frisian ships. It is probable that, under the classical tutelage of Asser, Alfred used the design of Greek and Roman warships, with high sides, designed for fighting rather than for navigation. Alfred had seapower in mind; if he could intercept raiding fleets before they landed, he could spare his kingdom from being ravaged. Alfred's ships may have been superior in conception, but in practice they proved to be too large to manoeuvre well in the close waters of estuaries and rivers, the only places in which a naval battle could be fought. The warships of the time were not designed to be ship killers but rather troop carriers. It has been suggested that, like sea battles in late Viking age Scandinavia, these battles may have entailed a ship coming alongside an opposing vessel, lashing the two ships together and then boarding the craft. The result was a land battle involving hand-to-hand fighting on board the two lashed vessels. In the one recorded naval engagement in 896, Alfred's new fleet of nine ships intercepted six Viking ships at the mouth of an unidentified river in the south of England. The Danes had beached half their ships and gone inland. Alfred's ships immediately moved to block their escape. The three Viking ships afloat attempted to break through the English lines. Only one made it; Alfred's ships intercepted the other two. Lashing the Viking boats to their own, the English crew boarded and proceeded to kill the Vikings. One ship escaped because Alfred's heavy ships became grounded when the tide went out. A land battle ensued between the crews. The Danes were heavily outnumbered, but as the tide rose, they returned to their boats which, with shallower drafts, were freed first. The English watched as the Vikings rowed past them but they suffered so many casualties (120 dead against 62 Frisians and English) that they had difficulty putting out to sea. All were too damaged to row around Sussex, and two were driven against the Sussex coast (possibly at Selsey Bill). The shipwrecked crew were brought before Alfred at Winchester and hanged. Legal reform In the late 880s or early 890s, Alfred issued a long domboc or law code consisting of his own laws, followed by a code issued by his late seventh-century predecessor King Ine of Wessex. Together these laws are arranged into 120 chapters. In his introduction Alfred explains that he gathered together the laws he found in many "synod-books" and "ordered to be written many of the ones that our forefathers observed—those that pleased me; and many of the ones that did not please me, I rejected with the advice of my councillors, and commanded them to be observed in a different way". Alfred singled out in particular the laws that he "found in the days of Ine, my kinsman, or Offa, king of the Mercians, or King Æthelberht of Kent who first among the English people received baptism". He appended, rather than integrated, the laws of Ine into his code and although he included, as had Æthelbert, a scale of payments in compensation for injuries to various body parts, the two injury tariffs are not aligned. Offa is not known to have issued a law code, leading historian Patrick Wormald to speculate that Alfred had in mind the legatine capitulary of 786 that was presented to Offa by the papal legate George of Ostia. About a fifth of the law code is taken up by Alfred's introduction which includes translations into English of the Ten Commandments, a few chapters from the Book of Exodus, and the Apostolic Letter from the Acts of the Apostles (15:23–29). The introduction may best be understood as Alfred's meditation upon the meaning of Christian law. It traces the continuity between God's gift of law to Moses to Alfred's own issuance of law to the West Saxon people. By doing so, it linked the holy past to the historical present and represented Alfred's law-giving as a type of divine legislation. Similarly Alfred divided his code into 120 chapters because 120 was the age at which Moses died and, in the number-symbolism of early medieval biblical exegetes, 120 stood for law. The link between Mosaic law and Alfred's code is the Apostolic Letter which explained that Christ "had come not to shatter or annul the commandments but to fulfill them; and he taught mercy and meekness" (Intro, 49.1). The mercy that Christ infused into Mosaic law underlies the injury tariffs that figure so prominently in barbarian law codes since Christian synods "established, through that mercy which Christ taught, that for almost every misdeed at the first offence secular lords might with their permission receive without sin the monetary compensation which they then fixed". The only crime that could not be compensated with a payment of money was treachery to a lord "since Almighty God adjudged none for those who despised Him, nor did Christ, the Son of God, adjudge any for the one who betrayed Him to death; and He commanded everyone to love his lord as Himself". Alfred's transformation of Christ's commandment, from "Love your neighbour as yourself" (Matt. 22:39–40) to love your secular lord as you would love the Lord Christ himself, underscores the importance that Alfred placed upon lordship which he understood as a sacred bond instituted by God for the governance of man. When one turns from the domboc introduction to the laws themselves, it is difficult to uncover any logical arrangement. The impression is of a hodgepodge of miscellaneous laws. The law code, as it has been preserved, is singularly unsuitable for use in lawsuits. In fact, several of Alfred's laws contradicted the laws of Ine that form an integral part of the code. Patrick Wormald's explanation is that Alfred's law code should be understood not as a legal manual but as an ideological manifesto of kingship "designed more for symbolic impact than for practical direction". In practical terms the most important law in the code may well have been the first: "We enjoin, what is most necessary, that each man keep carefully his oath and his pledge" which expresses a fundamental tenet of Anglo-Saxon law. Alfred devoted considerable attention and thought to judicial matters. Asser underscores his concern for judicial fairness. Alfred, according to Asser, insisted upon reviewing contested judgments made by his ealdormen and reeves and "would carefully look into nearly all the judgements which were passed [issued] in his absence anywhere in the realm to see whether they were just or unjust". A charter from the reign of his son Edward the Elder depicts Alfred as hearing one such appeal in his chamber while washing his hands. Asser represents Alfred as a Solomonic judge, painstaking in his own judicial investigations and critical of royal officials who rendered unjust or unwise judgments. Although Asser never mentions Alfred's law code he does say that Alfred insisted that his judges be literate so that they could apply themselves "to the pursuit of wisdom". The failure to comply with this royal order was to be punished by loss of office. The Anglo-Saxon Chronicle, commissioned at the time of Alfred, was probably written to promote unification of England, whereas Asser's The Life of King Alfred promoted Alfred's achievements and personal qualities. It was possible that the document was designed this way so that it could be disseminated in Wales because Alfred had acquired overlordship of that country. Foreign relations Asser speaks grandiosely of Alfred's relations with foreign powers but little definite information is available. His interest in foreign countries is shown by the insertions which he made in his translation of Orosius. He corresponded with Elias III, the patriarch of Jerusalem, and embassies to Rome conveying the English alms to the pope were fairly frequent. Around 890, Wulfstan of Hedeby undertook a journey from Hedeby on Jutland along the Baltic Sea to the Prussian trading town of Truso. Alfred personally collected details of this trip. Alfred's relations with the Celtic princes in the western half of Great Britain are clearer. Comparatively early in his reign, according to Asser, the southern Welsh princes, owing to the pressure on them from North Wales and Mercia, commended themselves to Alfred. Later in his reign, the North Welsh followed their example and the latter cooperated with the English in the campaign of 893 (or 894). That Alfred sent alms to Irish and Continental monasteries may be taken on Asser's authority. The visit of three pilgrim "Scots" (i.e., Irish) to Alfred in 891 is undoubtedly authentic. The story that, in his childhood, he was sent to Ireland to be healed by Saint Modwenna may show Alfred's interest in that island. Religion, education and culture In the 880s, at the same time that he was "cajoling and threatening" his nobles to build and man the burhs, Alfred, perhaps inspired by the example of Charlemagne almost a century before, undertook an equally ambitious effort to revive learning. During this period, the Viking raids were often seen as a divine punishment, and Alfred may have wished to revive religious awe in order to appease God's wrath. This revival entailed the recruitment of clerical scholars from Mercia, Wales and abroad to enhance the tenor of the court and of the episcopacy; the establishment of a court school to educate his own children, the sons of his nobles, and intellectually promising boys of lesser birth; an attempt to require literacy in those who held offices of authority; a series of translations into the vernacular of Latin works the king deemed "most necessary for all men to know"; the compilation of a chronicle detailing the rise of Alfred's kingdom and house, with a genealogy that stretched back to Adam, thus giving the West Saxon kings a biblical ancestry. Very little is known of the church under Alfred. The Danish attacks had been particularly damaging to the monasteries. Although Alfred founded monasteries at Athelney and Shaftesbury, these were the first new monastic houses in Wessex since the beginning of the eighth century. According to Asser, Alfred enticed foreign monks to England for his monastery at Athelney because there was little interest for the locals to take up the monastic life. Alfred undertook no systematic reform of ecclesiastical institutions or religious practices in Wessex. For him, the key to the kingdom's spiritual revival was to appoint pious, learned, and trustworthy bishops and abbots. As king, he saw himself as responsible for both the temporal and spiritual welfare of his subjects. Secular and spiritual authority were not distinct categories for Alfred. He was equally comfortable distributing his translation of Gregory the Great's Pastoral Care to his bishops so that they might better train and supervise priests and using those same bishops as royal officials and judges. Nor did his piety prevent him from expropriating strategically sited church lands, especially estates along the border with the Danelaw, and transferring them to royal thegns and officials who could better defend them against Viking attacks. Effect of Danish raids on education The Danish raids had a devastating effect on learning in England. Alfred lamented in the preface to his translation of Gregory's Pastoral Care that "learning had declined so thoroughly in England that there were very few men on this side of the Humber who could understand their divine services in English or even translate a single letter from Latin into English: and I suppose that there were not many beyond the Humber either". Alfred undoubtedly exaggerated, for dramatic effect, the abysmal state of learning in England during his youth. That Latin learning had not been obliterated is evidenced by the presence in his court of learned Mercian and West Saxon clerics such as Plegmund, Wæferth, and Wulfsige. Manuscript production in England dropped off precipitously around the 860s when the Viking invasions began in earnest, not to be revived until the end of the century. Numerous Anglo-Saxon manuscripts burnt along with the churches that housed them. A solemn diploma from Christ Church, Canterbury, dated 873, is so poorly constructed and written that historian Nicholas Brooks posited a scribe who was either so blind he could not read what he wrote or who knew little or no Latin. "It is clear", Brooks concludes, "that the metropolitan church [of Canterbury] must have been quite unable to provide any effective training in the scriptures or in Christian worship". Establishment of a court school Alfred established a court school for the education of his own children, those of the nobility, and "a good many of lesser birth". There they studied books in both English and Latin and "devoted themselves to writing, to such an extent… they were seen to be devoted and intelligent students of the liberal arts". He recruited scholars from the Continent and from Britain to aid in the revival of Christian learning in Wessex and to provide the king personal instruction. Grimbald and John the Saxon came from Francia; Plegmund (whom Alfred appointed archbishop of Canterbury in 890), Bishop Wærferth of Worcester, Æthelstan, and the royal chaplains Werwulf, from Mercia; and Asser, from St David's in southwestern Wales. Advocacy of education in English Alfred's educational ambitions seem to have extended beyond the establishment of a court school. Believing that without Christian wisdom there can be neither prosperity nor success in war, Alfred aimed "to set to learning (as long as they are not useful for some other employment) all the free-born young men now in England who have the means to apply themselves to it". Conscious of the decay of Latin literacy in his realm, Alfred proposed that primary education be taught in English, with those wishing to advance to holy orders to continue their studies in Latin. There were few "books of wisdom" written in English. Alfred sought to remedy this through an ambitious court-centred programme of translating into English the books he deemed "most necessary for all men to know". It is unknown when Alfred launched this programme, but it may have been during the 880s when Wessex was enjoying a respite from Viking attacks. Alfred was, until recently, often considered to have been the author of many of the translations, but this is now considered doubtful in almost all cases. Scholars more often refer to translations as "Alfredian", indicating that they probably had something to do with his patronage, but are unlikely to be his own work. Apart from the lost Handboc or Encheiridio, which seems to have been a commonplace book kept by the king, the earliest work to be translated was the Dialogues of Gregory the Great, a book greatly popular in the Middle Ages. The translation was undertaken at Alfred's command by Wærferth, Bishop of Worcester, with the king merely furnishing a preface. Remarkably, Alfred – undoubtedly with the advice and aid of his court scholars – translated four works himself: Gregory the Great's Pastoral Care, Boethius's Consolation of Philosophy, St. Augustine's Soliloquies and the first fifty psalms of the Psalter. One might add to this list the translation, in Alfred's law code, of excerpts from the Vulgate Book of Exodus. The Old English versions of Orosius's Histories against the Pagans and Bede's Ecclesiastical History of the English People are no longer accepted by scholars as Alfred's own translations because of lexical and stylistic differences. Nonetheless, the consensus remains that they were part of the Alfredian programme of translation. Simon Keynes and Michael Lapidge suggest this also for Bald's Leechbook and the anonymous Old English Martyrology. The preface of Alfred's translation of Pope Gregory the Great's Pastoral Care explained why he thought it necessary to translate works such as this from Latin into English. Although he described his method as translating "sometimes word for word, sometimes sense for sense", the translation keeps very close to the original although, through his choice of language, he blurred throughout the distinction between spiritual and secular authority. Alfred meant the translation to be used, and circulated it to all his bishops. Interest in Alfred's translation of Pastoral Care was so enduring that copies were still being made in the 11th century. Boethius's Consolation of Philosophy was the most popular philosophical handbook of the Middle Ages. Unlike the translation of the Pastoral Care, the Alfredian text deals very freely with the original and, though the late Dr. G. Schepss showed that many of the additions to the text are to be traced not to the translator himself but to the glosses and commentaries which he used, still there is much in the work which is distinctive to the translation and has been taken to reflect philosophies of kingship in Alfred's milieu. It is in the Boethius that the oft-quoted sentence occurs: "To speak briefly: I desired to live worthily as long as I lived, and after my life to leave to them that should come after, my memory in good works." The book has come down to us in two manuscripts only. In one of these the writing is prose, in the other a combination of prose and alliterating verse. The latter manuscript was severely damaged in the 18th and 19th centuries. The last of the Alfredian works is one which bears the name Blostman ('Blooms') or Anthology. The first half is based mainly on the Soliloquies of St Augustine of Hippo, the remainder is drawn from various sources. The material has traditionally been thought to contain much that is Alfred's own and highly characteristic of him. The last words of it may be quoted; they form a fitting epitaph for the noblest of English kings. "Therefore, he seems to me a very foolish man, and truly wretched, who will not increase his understanding while he is in the world, and ever wish and long to reach that endless life where all shall be made clear." Alfred appears as a character in the twelfth- or 13th-century poem The Owl and the Nightingale where his wisdom and skill with proverbs is praised. The Proverbs of Alfred, a 13th-century work, contains sayings that are not likely to have originated with Alfred but attest to his posthumous medieval reputation for wisdom. The Alfred jewel, discovered in Somerset in 1693, has long been associated with King Alfred because of its Old English inscription AELFRED MEC HEHT GEWYRCAN ('Alfred ordered me to be made'). The jewel is about long, made of filigreed gold, enclosing a highly polished piece of quartz crystal beneath which is set in a cloisonné enamel plaque with an enamelled image of a man holding floriate sceptres, perhaps personifying Sight or the Wisdom of God. It was at one time attached to a thin rod or stick based on the hollow socket at its base. The jewel certainly dates from Alfred's reign. Although its function is unknown, it has been often suggested that the jewel was one of the æstels – pointers for reading – that Alfred ordered sent to every bishopric accompanying a copy of his translation of the Pastoral Care. Each æstel was worth the princely sum of 50 mancuses which fits in well with the quality workmanship and expensive materials of the Alfred jewel. Historian Richard Abels sees Alfred's educational and military reforms as complementary. Restoring religion and learning in Wessex, Abels contends, was to Alfred's mind as essential to the defence of his realm as the building of the burhs. As Alfred observed in the preface to his English translation of Gregory the Great's Pastoral Care, kings who fail to obey their divine duty to promote learning can expect earthly punishments to befall their people. The pursuit of wisdom, he assured his readers of the Boethius, was the surest path to power: "Study wisdom, then, and, when you have learned it, condemn it not, for I tell you that by its means you may without fail attain to power, yea, even though not desiring it". The portrayal of the West-Saxon resistance to the Vikings by Asser and the chronicler as a Christian holy war was more than mere rhetoric or propaganda. It reflected Alfred's own belief in a doctrine of divine rewards and punishments rooted in a vision of a hierarchical Christian world order in which God is the Lord to whom kings owe obedience and through whom they derive their authority over their followers. The need to persuade his nobles to undertake work for the 'common good' led Alfred and his court scholars to strengthen and deepen the conception of Christian kingship that he had inherited by building upon the legacy of earlier kings including Offa, clerical writers including Bede, and Alcuin and various participants in the Carolingian renaissance. This was not a cynical use of religion to manipulate his subjects into obedience but an intrinsic element in Alfred's worldview. He believed, as did other kings in ninth-century England and Francia, that God had entrusted him with the spiritual as well as physical welfare of his people. If the Christian faith fell into ruin in his kingdom, if the clergy were too ignorant to understand the Latin words they butchered in their offices and liturgies, if the ancient monasteries and collegiate churches lay deserted out of indifference, he was answerable before God, as Josiah had been. Alfred's ultimate responsibility was the pastoral care of his people. Appearance and character Asser wrote of Alfred in his Life of King Alfred, It is also written by Asser that Alfred did not learn to read until he was 12 years old or later, which is described as "shameful negligence" of his parents and tutors. Alfred was an excellent listener and had an incredible memory and he retained poetry and psalms very well. A story is told by Asser about how his mother held up a book of Saxon poetry to him and his brothers, and said; "I shall give this book to whichever one of you can learn it the fastest." After excitedly asking, "Will you really give this book to the one of us who can understand it the soonest and recite it to you?" Alfred then took it to his teacher, learned it, and recited it back to his mother. Alfred is noted as carrying around a small book, probably a medieval version of a small pocket notebook, that contained psalms and many prayers that he often collected. Asser writes: these "he collected in a single book, as I have seen for myself; amid all the affairs of the present life he took it around with him everywhere for the sake of prayer, and was inseparable from it." An excellent hunter in every branch of the sport, Alfred is remembered as an enthusiastic huntsman against whom nobody's skills could compare. He was the youngest of his brothers, and he was probably the most open-minded. He was an early advocate for education. His desire for learning could have come from his early love of English poetry and inability to read or physically record it until later in life. Asser writes that Alfred "could not satisfy his craving for what he desired the most, namely the liberal arts; for, as he used to say, there were no good scholars in the entire kingdom of the West Saxons at that time". Family In 868, Alfred married Ealhswith, daughter of a Mercian nobleman, Æthelred Mucel, Ealdorman of the Gaini. The Gaini were probably one of the tribal groups of the Mercians. Ealhswith's mother, Eadburh, was a member of the Mercian royal family. They had five or six children together, including Edward the Elder who succeeded his father as king; Æthelflæd who became lady of the Mercians; and Ælfthryth who married Baldwin II, Count of Flanders. Alfred's mother was Osburga, daughter of Oslac of the Isle of Wight, Chief Butler of England. Asser, in his Vita Ælfredi asserts that this shows his lineage from the Jutes of the Isle of Wight. Osferth was described as a relative in King Alfred's will and he attested charters in a high position until 934. A charter of King Edward's reign described him as the king's brother – mistakenly according to Keynes and Lapidge, but in the view of Janet Nelson, he probably was an illegitimate son of King Alfred. Death and burial Alfred died on 26 October 899 at the age of 50 or 51. How he died is unknown, but he suffered throughout his life with a painful and unpleasant illness. His biographer Asser gave a detailed description of Alfred's symptoms, and this has allowed modern doctors to provide a possible diagnosis. It is thought that he had either Crohn's disease or haemorrhoids. His grandson King Eadred seems to have had a similar illness. Alfred was temporarily buried at the Old Minster in Winchester with his wife Ealhswith and later, his son Edward the Elder. Before his death he had ordered the construction of the New Minster hoping that it would become a mausoleum for him and his family. Four years after his death, the bodies of Alfred and his family were exhumed and moved to their new resting place in the New Minster and remained there for 211 years. When William the Conqueror rose to the English throne after the Norman conquest in 1066, many Anglo-Saxon abbeys were demolished and replaced with Norman cathedrals. One of those unfortunate abbeys was the very New Minster abbey where Alfred was laid to rest. Before demolition, the monks at the New Minster exhumed the bodies of Alfred and his family to safely transfer them to a new location. The New Minster monks moved to Hyde in 1110 a little north of the city, and they transferred to Hyde Abbey along with Alfred's body and those of his wife and children, which were interred before the high altar. In 1536, many Roman Catholic churches were vandalized by the people of England spurred by disillusionment with the church during the Dissolution of the Monasteries. One such Catholic church was the site of Alfred's burial, Hyde Abbey. Once again, Alfred's place of rest was disturbed for the now 3rd time. Hyde Abbey was dissolved in 1538 during the reign of Henry VIII, the church site was demolished and treated like a quarry, as the stones that made up the abbey were then re-used in local architecture. The stone graves housing Alfred and his family stayed underground, and the land returned to farming. These graves remained intact until 1788 when the site was acquired by the county for the construction of a town jail. Before construction began, convicts that would later be imprisoned at the site were sent in to prepare the ground, to ready it for building. While digging the foundation trenches, the convicts discovered the coffins of Alfred and his family. The local Catholic priest, Dr. Milner recounts this event:The convicts broke the stone coffins into pieces, the lead, which lined the coffins, was sold for two guineas, and the bones within scattered around the area. The prison was demolished between 1846 and 1850. Further excavations were inconclusive in 1866 and 1897. In 1866, amateur antiquarian John Mellor claimed to have recovered a number of bones from the site which he said were those of Alfred. These came into the possession of the vicar of nearby St Bartholomew's Church who reburied them in an unmarked grave in the church graveyard. Excavations conducted by the Winchester Museums Service of the Hyde Abbey site in 1999 located a second pit dug in front of where the high altar would have been located, which was identified as probably dating to Mellor's 1866 excavation. The 1999 archeological excavation uncovered the foundations of the abbey buildings and some bones, suggested at the time to be those of Alfred; they proved instead to belong to an elderly woman. In March 2013, the Diocese of Winchester exhumed the bones from the unmarked grave at St Bartholomew's and placed them in secure storage. The diocese made no claim that they were the bones of Alfred, but intended to secure them for later analysis, and from the attentions of people whose interest may have been sparked by the recent identification of the remains of Richard III. The bones were radiocarbon-dated but the results showed that they were from the 1300s and therefore not of Alfred. In January 2014, a fragment of pelvis that had been unearthed in the 1999 excavation of the Hyde site, and had subsequently lain in a Winchester museum store room, was radiocarbon-dated to the correct period. It has been suggested that this bone may belong to either Alfred or his son Edward, but this remains unproven. Legacy Henry VI of England attempted unsuccessfully to have Alfred canonized by Pope Eugene IV in 1441. The current "Roman Martyrology" does not mention Alfred. The Anglican Communion venerates him as a Christian hero, with a Lesser Festival on 26 October, and he may often be found depicted in stained glass in Church of England parish churches. In 2007 the Holy Synod of the Russian Orthodox Church canonised "All Saints of the British Isles" including King Alfred. He is honoured during the Feast of all Saints of the British Isles on the third Sunday after Pentecost and on his feast day of 26 October. There is an Orthodox Mission named after St Alfred in Middleburg, Florida. Alfred commissioned Bishop Asser to write his biography, which inevitably emphasised Alfred's positive aspects. Later medieval historians such as Geoffrey of Monmouth also reinforced Alfred's favourable image. By the time of the Reformation, Alfred was seen as a pious Christian ruler who promoted the use of English rather than Latin, and so the translations that he commissioned were viewed as untainted by the later Roman Catholic influences of the Normans. Consequently, it was writers of the 16th century who gave Alfred his epithet as "the Great", not any of Alfred's contemporaries. The epithet was retained by succeeding generations who admired Alfred's patriotism, success against barbarism, promotion of education, and establishment of the rule of law. A number of educational establishments are named in Alfred's honour: The University of Winchester created from the former King Alfred's College, Winchester (1928 to 2004) Alfred University and Alfred State College in Alfred, New York; the local telephone exchange for Alfred University is 871 in commemoration of the year of Alfred's ascension to the throne. Additionally, the mascot of Alfred University is named Lil' Alf and is modeled after the king The University of Liverpool created a King Alfred Chair of English Literature King Alfred's Academy, a secondary school in Wantage, Oxfordshire, the birthplace of Alfred King's Lodge School in Chippenham, Wiltshire, so named because King Alfred's hunting lodge is reputed to have stood on or near the site of the school The King Alfred School and Specialist Sports Academy, Burnham Road, Highbridge, so named due to its rough proximity to Brent Knoll (a Beacon site) and Athelney The King Alfred School in Barnet, North London, UK King Alfred's house in Bishop Stopford's School at Enfield King Alfred Swimming Pool & Leisure complex in Hove, Brighton UK The Royal Navy named one ship and two shore establishments HMS King Alfred, and one of the early ships of the U.S. Navy was named USS Alfred in his honour. In 2002, Alfred was ranked number 14 in the BBC's list of the 100 Greatest Britons following a UK-wide vote. Statues Pewsey A prominent statue of King Alfred the Great stands in the middle of Pewsey. It was unveiled in June 1913 to commemorate the coronation of King George V. Southwark A statue of Alfred the Great located in Trinity Church Square, Southwark is considered to be the oldest outdoor statue in London, and part of it has been found to date to Roman times. The sculpture was thought to be medieval until 2021 conservation work. The lower half was then discovered to be Bath Stone and part of a colossal ancient sculpture dedicated to the goddess Minerva. It is typical of the 2nd Century, dating to around the reign of Hadrian. The lower older half is likely to have been carved by a continental craftsman used to working with British stone. The upper half dates to the late 18th or early 19th century, cast to fit the lower portion from Coade stone. Wantage A statue of Alfred the Great, situated in the Wantage market place, was sculpted by Count Gleichen, a relative of Queen Victoria, and unveiled on 14 July 1877 by the Prince and Princess of Wales. The statue was vandalised on New Year's Eve 2007, losing part of its right arm and axe. After the arm and axe were replaced, the statue was again vandalised on Christmas Eve 2008, losing its axe. Winchester A bronze statue of Alfred the Great stands at the eastern end of The Broadway, close to the site of Winchester's medieval East Gate. The statue was designed by Hamo Thornycroft, cast in bronze by Singer & Sons of Frome and erected in 1899 to mark one thousand years since Alfred's death. The statue is placed on a pedestal consisting of two immense blocks of grey Cornish granite. Alfred University, New York The centerpiece of Alfred University's quad is a bronze statue of the king, created in 1990 by then-professor William Underhill. It features the king as a young man, holding a shield in his left hand and an open book in his right. Cleveland, Ohio A marble statue of Alfred the Great stands on the North side of the Cuyahoga County Courthouse in Cleveland, Ohio. It was sculpted by Isidore Konti in 1910. Chronology Notes Citations Sources — "Note: This electronic edition [of the Anglo-Saxon Chronicle] is a collation of material from nine diverse extant versions of the Chronicle. It contains primarily the translation of Rev. James Ingram, as published in the [1847] Everyman edition". It was "Originally compiled on the orders of King Alfred the Great, approximately A.D. 890, and subsequently maintained and added to by generations of anonymous scribes until the middle of the 12th Century". Attribution: Further reading External links Alfred the Great at the official website of the British monarchy Alfred the Great at BBC History 840s births 899 deaths Year of birth uncertain 9th-century Christians 9th-century English monarchs 9th-century translators Boat and ship designers English Christians House of Wessex Medieval legislators Monarchs of England before 1066 Patrons of literature People from Wantage Translators from Latin Translators of philosophy West Saxon monarchs

1645

https://en.wikipedia.org/wiki/Ibn%20al-Haytham

Ibn al-Haytham

Ḥasan Ibn al-Haytham (Latinized as Alhazen; ; full name ; ) was a medieval mathematician, astronomer, and physicist of the Islamic Golden Age from present-day Iraq. Referred to as "the father of modern optics", he made significant contributions to the principles of optics and visual perception in particular. His most influential work is titled Kitāb al-Manāẓir (Arabic: , "Book of Optics"), written during 1011–1021, which survived in a Latin edition. The works of Alhazen were frequently cited during the scientific revolution by Isaac Newton, Johannes Kepler, Christiaan Huygens, and Galileo Galilei. Ibn al-Haytham was the first to correctly explain the theory of vision, and to argue that vision occurs in the brain, pointing to observations that it is subjective and affected by personal experience. He also stated the principle of least time for refraction which would later become the Fermat's principle. He made major contributions to catoptrics and dioptrics by studying reflection, refraction and nature of images formed by light rays. Ibn al-Haytham was an early proponent of the concept that a hypothesis must be supported by experiments based on confirmable procedures or mathematical reasoning—an early pioneer in the scientific method five centuries before Renaissance scientists. On account of this, he is sometimes described as the world's "first true scientist". He was also a polymath, writing on philosophy, theology and medicine. Born in Basra, he spent most of his productive period in the Fatimid capital of Cairo and earned his living authoring various treatises and tutoring members of the nobilities. Ibn al-Haytham is sometimes given the byname al-Baṣrī after his birthplace, or al-Miṣrī ("the Egyptian"). Al-Haytham was dubbed the "Second Ptolemy" by Abu'l-Hasan Bayhaqi and "The Physicist" by John Peckham. Ibn al-Haytham paved the way for the modern science of physical optics. Biography Ibn al-Haytham (Alhazen) was born c. 965 to a family of Arab or Persian origin in Basra, Iraq, which was at the time part of the Buyid emirate. His initial influences were in the study of religion and service to the community. At the time, society had a number of conflicting views of religion that he ultimately sought to step aside from religion. This led to him delving into the study of mathematics and science. He held a position with the title vizier in his native Basra, and made a name for himself on his knowledge of applied mathematics. As he claimed to be able to regulate the flooding of the Nile, he was invited to meet the Fatimid Caliph al-Hakim in order to realise a hydraulic project at Aswan. However, Ibn al-Haytham was forced to concede the impracticability of his project. Upon his return to Cairo, he was given an administrative post. After he proved unable to fulfill this task as well, he contracted the ire of the caliph al-Hakim, and is said to have been forced into hiding until the caliph's death in 1021, after which his confiscated possessions were returned to him. Legend has it that Alhazen feigned madness and was kept under house arrest during this period. During this time, he wrote his influential Book of Optics. Alhazen continued to live in Cairo, in the neighborhood of the famous University of al-Azhar, and lived from the proceeds of his literary production until his death in c. 1040. (A copy of Apollonius' Conics, written in Ibn al-Haytham's own handwriting exists in Aya Sofya: (MS Aya Sofya 2762, 307 fob., dated Safar 415 A.H. [1024]).) Among his students were Sorkhab (Sohrab), a Persian from Semnan, and Abu al-Wafa Mubashir ibn Fatek, an Egyptian prince. Book of Optics Alhazen's most famous work is his seven-volume treatise on optics Kitab al-Manazir (Book of Optics), written from 1011 to 1021. In it, Ibn al-Haytham was the first to explain that vision occurs when light reflects from an object and then passes to one's eyes, and to argue that vision occurs in the brain, pointing to observations that it is subjective and affected by personal experience. Optics was translated into Latin by an unknown scholar at the end of the 12th century or the beginning of the 13th century. This work enjoyed a great reputation during the Middle Ages. The Latin version of De aspectibus was translated at the end of the 14th century into Italian vernacular, under the title De li aspecti. It was printed by Friedrich Risner in 1572, with the title Opticae thesaurus: Alhazeni Arabis libri septem, nuncprimum editi; Eiusdem liber De Crepusculis et nubium ascensionibus (English: Treasury of Optics: seven books by the Arab Alhazen, first edition; by the same, on twilight and the height of clouds). Risner is also the author of the name variant "Alhazen"; before Risner he was known in the west as Alhacen. Works by Alhazen on geometric subjects were discovered in the Bibliothèque nationale in Paris in 1834 by E. A. Sedillot. In all, A. Mark Smith has accounted for 18 full or near-complete manuscripts, and five fragments, which are preserved in 14 locations, including one in the Bodleian Library at Oxford, and one in the library of Bruges. Theory of optics Two major theories on vision prevailed in classical antiquity. The first theory, the emission theory, was supported by such thinkers as Euclid and Ptolemy, who believed that sight worked by the eye emitting rays of light. The second theory, the intromission theory supported by Aristotle and his followers, had physical forms entering the eye from an object. Previous Islamic writers (such as al-Kindi) had argued essentially on Euclidean, Galenist, or Aristotelian lines. The strongest influence on the Book of Optics was from Ptolemy's Optics, while the description of the anatomy and physiology of the eye was based on Galen's account. Alhazen's achievement was to come up with a theory that successfully combined parts of the mathematical ray arguments of Euclid, the medical tradition of Galen, and the intromission theories of Aristotle. Alhazen's intromission theory followed al-Kindi (and broke with Aristotle) in asserting that "from each point of every colored body, illuminated by any light, issue light and color along every straight line that can be drawn from that point". This left him with the problem of explaining how a coherent image was formed from many independent sources of radiation; in particular, every point of an object would send rays to every point on the eye. What Alhazen needed was for each point on an object to correspond to one point only on the eye. He attempted to resolve this by asserting that the eye would only perceive perpendicular rays from the object—for any one point on the eye, only the ray that reached it directly, without being refracted by any other part of the eye, would be perceived. He argued, using a physical analogy, that perpendicular rays were stronger than oblique rays: in the same way that a ball thrown directly at a board might break the board, whereas a ball thrown obliquely at the board would glance off, perpendicular rays were stronger than refracted rays, and it was only perpendicular rays which were perceived by the eye. As there was only one perpendicular ray that would enter the eye at any one point, and all these rays would converge on the centre of the eye in a cone, this allowed him to resolve the problem of each point on an object sending many rays to the eye; if only the perpendicular ray mattered, then he had a one-to-one correspondence and the confusion could be resolved. He later asserted (in book seven of the Optics) that other rays would be refracted through the eye and perceived as if perpendicular. His arguments regarding perpendicular rays do not clearly explain why only perpendicular rays were perceived; why would the weaker oblique rays not be perceived more weakly? His later argument that refracted rays would be perceived as if perpendicular does not seem persuasive. However, despite its weaknesses, no other theory of the time was so comprehensive, and it was enormously influential, particularly in Western Europe. Directly or indirectly, his De Aspectibus (Book of Optics) inspired much activity in optics between the 13th and 17th centuries. Kepler's later theory of the retinal image (which resolved the problem of the correspondence of points on an object and points in the eye) built directly on the conceptual framework of Alhazen. Alhazen showed through experiment that light travels in straight lines, and carried out various experiments with lenses, mirrors, refraction, and reflection. His analyses of reflection and refraction considered the vertical and horizontal components of light rays separately. Alhazen studied the process of sight, the structure of the eye, image formation in the eye, and the visual system. Ian P. Howard argued in a 1996 Perception article that Alhazen should be credited with many discoveries and theories previously attributed to Western Europeans writing centuries later. For example, he described what became in the 19th century Hering's law of equal innervation. He wrote a description of vertical horopters 600 years before Aguilonius that is actually closer to the modern definition than Aguilonius's—and his work on binocular disparity was repeated by Panum in 1858. Craig Aaen-Stockdale, while agreeing that Alhazen should be credited with many advances, has expressed some caution, especially when considering Alhazen in isolation from Ptolemy, with whom Alhazen was extremely familiar. Alhazen corrected a significant error of Ptolemy regarding binocular vision, but otherwise his account is very similar; Ptolemy also attempted to explain what is now called Hering's law. In general, Alhazen built on and expanded the optics of Ptolemy. In a more detailed account of Ibn al-Haytham's contribution to the study of binocular vision based on Lejeune and Sabra, Raynaud showed that the concepts of correspondence, homonymous and crossed diplopia were in place in Ibn al-Haytham's optics. But contrary to Howard, he explained why Ibn al-Haytham did not give the circular figure of the horopter and why, by reasoning experimentally, he was in fact closer to the discovery of Panum's fusional area than that of the Vieth-Müller circle. In this regard, Ibn al-Haytham's theory of binocular vision faced two main limits: the lack of recognition of the role of the retina, and obviously the lack of an experimental investigation of ocular tracts. Alhazen's most original contribution was that, after describing how he thought the eye was anatomically constructed, he went on to consider how this anatomy would behave functionally as an optical system. His understanding of pinhole projection from his experiments appears to have influenced his consideration of image inversion in the eye, which he sought to avoid. He maintained that the rays that fell perpendicularly on the lens (or glacial humor as he called it) were further refracted outward as they left the glacial humor and the resulting image thus passed upright into the optic nerve at the back of the eye. He followed Galen in believing that the lens was the receptive organ of sight, although some of his work hints that he thought the retina was also involved. Alhazen's synthesis of light and vision adhered to the Aristotelian scheme, exhaustively describing the process of vision in a logical, complete fashion. His research in catoptrics (the study of optical systems using mirrors) was centred on spherical and parabolic mirrors and spherical aberration. He made the observation that the ratio between the angle of incidence and refraction does not remain constant, and investigated the magnifying power of a lens. Law of reflection Alhazen was the first physicist to give complete statement of the law of reflection. He was first to state that the incident ray, the reflected ray, and the normal to the surface all lie in a same plane perpendicular to reflecting plane. Alhazen's problem His work on catoptrics in Book V of the Book of Optics contains a discussion of what is now known as Alhazen's problem, first formulated by Ptolemy in 150 AD. It comprises drawing lines from two points in the plane of a circle meeting at a point on the circumference and making equal angles with the normal at that point. This is equivalent to finding the point on the edge of a circular billiard table at which a player must aim a cue ball at a given point to make it bounce off the table edge and hit another ball at a second given point. Thus, its main application in optics is to solve the problem, "Given a light source and a spherical mirror, find the point on the mirror where the light will be reflected to the eye of an observer." This leads to an equation of the fourth degree. This eventually led Alhazen to derive a formula for the sum of fourth powers, where previously only the formulas for the sums of squares and cubes had been stated. His method can be readily generalized to find the formula for the sum of any integral powers, although he did not himself do this (perhaps because he only needed the fourth power to calculate the volume of the paraboloid he was interested in). He used his result on sums of integral powers to perform what would now be called an integration, where the formulas for the sums of integral squares and fourth powers allowed him to calculate the volume of a paraboloid. Alhazen eventually solved the problem using conic sections and a geometric proof. His solution was extremely long and complicated and may not have been understood by mathematicians reading him in Latin translation. Later mathematicians used Descartes' analytical methods to analyse the problem. An algebraic solution to the problem was finally found in 1965 by Jack M. Elkin, an actuarian. Other solutions were discovered in 1989, by Harald Riede and in 1997 by the Oxford mathematician Peter M. Neumann. Recently, Mitsubishi Electric Research Laboratories (MERL) researchers solved the extension of Alhazen's problem to general rotationally symmetric quadric mirrors including hyperbolic, parabolic and elliptical mirrors. Camera Obscura The camera obscura was known to the ancient Chinese, and was described by the Han Chinese polymath Shen Kuo in his scientific book Dream Pool Essays, published in the year 1088 C.E. Aristotle had discussed the basic principle behind it in his Problems, but Alhazen's work contained the first clear description of camera obscura. and early analysis of the device. Ibn al-Haytham used a camera obscura mainly to observe a partial solar eclipse. In his essay, Ibn al-Haytham writes that he observed the sickle-like shape of the sun at the time of an eclipse. The introduction reads as follows: "The image of the sun at the time of the eclipse, unless it is total, demonstrates that when its light passes through a narrow, round hole and is cast on a plane opposite to the hole it takes on the form of a moonsickle." It is admitted that his findings solidified the importance in the history of the camera obscura but this treatise is important in many other respects. Ancient optics and medieval optics were divided into optics and burning mirrors. Optics proper mainly focused on the study of vision, while burning mirrors focused on the properties of light and luminous rays. On the shape of the eclipse is probably one of the first attempts made by Ibn al-Haytham to articulate these two sciences. Very often Ibn al-Haytham's discoveries benefited from the intersection of mathematical and experimental contributions. This is the case with On the shape of the eclipse. Besides the fact that this treatise allowed more people to study partial eclipses of the sun, it especially allowed to better understand how the camera obscura works. This treatise is a physico-mathematical study of image formation inside the camera obscura. Ibn al-Haytham takes an experimental approach, and determines the result by varying the size and the shape of the aperture, the focal length of the camera, the shape and intensity of the light source. In his work he explains the inversion of the image in the camera obscura, the fact that the image is similar to the source when the hole is small, but also the fact that the image can differ from the source when the hole is large. All these results are produced by using a point analysis of the image. Refractometer In the seventh tract of his book of optics, Alhazen described an apparatus for experimenting with various cases of refraction, in order to investigate the relations between the angle of incidence, the angle of refraction and the angle of deflection. This apparatus was a modified version of an apparatus used by Ptolemy for similar purpose. Unconscious inference Alhazen basically states the concept of unconscious inference in his discussion of colour before adding that the inferential step between sensing colour and differentiating it is shorter than the time taken between sensing and any other visible characteristic (aside from light), and that "time is so short as not to be clearly apparent to the beholder." Naturally, this suggests that the colour and form are perceived elsewhere. Alhazen goes on to say that information must travel to the central nerve cavity for processing and:the sentient organ does not sense the forms that reach it from the visible objects until after it has been affected by these forms; thus it does not sense color as color or light as light until after it has been affected by the form of color or light. Now the affectation received by the sentient organ from the form of color or of light is a certain change; and change must take place in time; …..and it is in the time during which the form extends from the sentient organ's surface to the cavity of the common nerve, and in (the time) following that, that the sensitive faculty, which exists in the whole of the sentient body will perceive color as color…Thus the last sentient's perception of color as such and of light as such takes place at a time following that in which the form arrives from the surface of the sentient organ to the cavity of the common nerve. Color constancy Alhazen explained color constancy by observing that the light reflected from an object is modified by the object's color. He explained that the quality of the light and the color of the object are mixed, and the visual system separates light and color. In Book II, Chapter 3 he writes:Again the light does not travel from the colored object to the eye unaccompanied by the color, nor does the form of the color pass from the colored object to the eye unaccompanied by the light. Neither the form of the light nor that of the color existing in the colored object can pass except as mingled together and the last sentient can only perceive them as mingled together. Nevertheless, the sentient perceives that the visible object is luminous and that the light seen in the object is other than the color and that these are two properties. Other contributions The Kitab al-Manazir (Book of Optics) describes several experimental observations that Alhazen made and how he used his results to explain certain optical phenomena using mechanical analogies. He conducted experiments with projectiles and concluded that only the impact of perpendicular projectiles on surfaces was forceful enough to make them penetrate, whereas surfaces tended to deflect oblique projectile strikes. For example, to explain refraction from a rare to a dense medium, he used the mechanical analogy of an iron ball thrown at a thin slate covering a wide hole in a metal sheet. A perpendicular throw breaks the slate and passes through, whereas an oblique one with equal force and from an equal distance does not. He also used this result to explain how intense, direct light hurts the eye, using a mechanical analogy: Alhazen associated 'strong' lights with perpendicular rays and 'weak' lights with oblique ones. The obvious answer to the problem of multiple rays and the eye was in the choice of the perpendicular ray, since only one such ray from each point on the surface of the object could penetrate the eye. Sudanese psychologist Omar Khaleefa has argued that Alhazen should be considered the founder of experimental psychology, for his pioneering work on the psychology of visual perception and optical illusions. Khaleefa has also argued that Alhazen should also be considered the "founder of psychophysics", a sub-discipline and precursor to modern psychology. Although Alhazen made many subjective reports regarding vision, there is no evidence that he used quantitative psychophysical techniques and the claim has been rebuffed. Alhazen offered an explanation of the Moon illusion, an illusion that played an important role in the scientific tradition of medieval Europe. Many authors repeated explanations that attempted to solve the problem of the Moon appearing larger near the horizon than it does when higher up in the sky. Alhazen argued against Ptolemy's refraction theory, and defined the problem in terms of perceived, rather than real, enlargement. He said that judging the distance of an object depends on there being an uninterrupted sequence of intervening bodies between the object and the observer. When the Moon is high in the sky there are no intervening objects, so the Moon appears close. The perceived size of an object of constant angular size varies with its perceived distance. Therefore, the Moon appears closer and smaller high in the sky, and further and larger on the horizon. Through works by Roger Bacon, John Pecham and Witelo based on Alhazen's explanation, the Moon illusion gradually came to be accepted as a psychological phenomenon, with the refraction theory being rejected in the 17th century. Although Alhazen is often credited with the perceived distance explanation, he was not the first author to offer it. Cleomedes ( 2nd century) gave this account (in addition to refraction), and he credited it to Posidonius ( 135–50 BCE). Ptolemy may also have offered this explanation in his Optics, but the text is obscure. Alhazen's writings were more widely available in the Middle Ages than those of these earlier authors, and that probably explains why Alhazen received the credit. Scientific method An aspect associated with Alhazen's optical research is related to systemic and methodological reliance on experimentation (i'tibar)(Arabic: اختبار) and controlled testing in his scientific inquiries. Moreover, his experimental directives rested on combining classical physics (ilm tabi'i) with mathematics (ta'alim; geometry in particular). This mathematical-physical approach to experimental science supported most of his propositions in Kitab al-Manazir (The Optics; De aspectibus or Perspectivae) and grounded his theories of vision, light and colour, as well as his research in catoptrics and dioptrics (the study of the reflection and refraction of light, respectively). According to Matthias Schramm, Alhazen "was the first to make a systematic use of the method of varying the experimental conditions in a constant and uniform manner, in an experiment showing that the intensity of the light-spot formed by the projection of the moonlight through two small apertures onto a screen diminishes constantly as one of the apertures is gradually blocked up." G. J. Toomer expressed some skepticism regarding Schramm's view, partly because at the time (1964) the Book of Optics had not yet been fully translated from Arabic, and Toomer was concerned that without context, specific passages might be read anachronistically. While acknowledging Alhazen's importance in developing experimental techniques, Toomer argued that Alhazen should not be considered in isolation from other Islamic and ancient thinkers. Toomer concluded his review by saying that it would not be possible to assess Schramm's claim that Ibn al-Haytham was the true founder of modern physics without translating more of Alhazen's work and fully investigating his influence on later medieval writers. Other works on physics Optical treatises Besides the Book of Optics, Alhazen wrote several other treatises on the same subject, including his Risala fi l-Daw (Treatise on Light). He investigated the properties of luminance, the rainbow, eclipses, twilight, and moonlight. Experiments with mirrors and the refractive interfaces between air, water, and glass cubes, hemispheres, and quarter-spheres provided the foundation for his theories on catoptrics. Celestial physics Alhazen discussed the physics of the celestial region in his Epitome of Astronomy, arguing that Ptolemaic models must be understood in terms of physical objects rather than abstract hypotheses—in other words that it should be possible to create physical models where (for example) none of the celestial bodies would collide with each other. The suggestion of mechanical models for the Earth centred Ptolemaic model "greatly contributed to the eventual triumph of the Ptolemaic system among the Christians of the West". Alhazen's determination to root astronomy in the realm of physical objects was important, however, because it meant astronomical hypotheses "were accountable to the laws of physics", and could be criticised and improved upon in those terms. He also wrote Maqala fi daw al-qamar (On the Light of the Moon). Mechanics In his work, Alhazen discussed theories on the motion of a body. In his Treatise on Place, Alhazen disagreed with Aristotle's view that nature abhors a void, and he used geometry in an attempt to demonstrate that place (al-makan) is the imagined three-dimensional void between the inner surfaces of a containing body. Astronomical works On the Configuration of the World In his On the Configuration of the World Alhazen presented a detailed description of the physical structure of the earth: The book is a non-technical explanation of Ptolemy's Almagest, which was eventually translated into Hebrew and Latin in the 13th and 14th centuries and subsequently had an influence on astronomers such as Georg von Peuerbach during the European Middle Ages and Renaissance. Doubts Concerning Ptolemy In his Al-Shukūk ‛alā Batlamyūs, variously translated as Doubts Concerning Ptolemy or Aporias against Ptolemy, published at some time between 1025 and 1028, Alhazen criticized Ptolemy's Almagest, Planetary Hypotheses, and Optics, pointing out various contradictions he found in these works, particularly in astronomy. Ptolemy's Almagest concerned mathematical theories regarding the motion of the planets, whereas the Hypotheses concerned what Ptolemy thought was the actual configuration of the planets. Ptolemy himself acknowledged that his theories and configurations did not always agree with each other, arguing that this was not a problem provided it did not result in noticeable error, but Alhazen was particularly scathing in his criticism of the inherent contradictions in Ptolemy's works. He considered that some of the mathematical devices Ptolemy introduced into astronomy, especially the equant, failed to satisfy the physical requirement of uniform circular motion, and noted the absurdity of relating actual physical motions to imaginary mathematical points, lines and circles: Having pointed out the problems, Alhazen appears to have intended to resolve the contradictions he pointed out in Ptolemy in a later work. Alhazen believed there was a "true configuration" of the planets that Ptolemy had failed to grasp. He intended to complete and repair Ptolemy's system, not to replace it completely. In the Doubts Concerning Ptolemy Alhazen set out his views on the difficulty of attaining scientific knowledge and the need to question existing authorities and theories: He held that the criticism of existing theories—which dominated this book—holds a special place in the growth of scientific knowledge. Model of the Motions of Each of the Seven Planets Alhazen's The Model of the Motions of Each of the Seven Planets was written 1038. Only one damaged manuscript has been found, with only the introduction and the first section, on the theory of planetary motion, surviving. (There was also a second section on astronomical calculation, and a third section, on astronomical instruments.) Following on from his Doubts on Ptolemy, Alhazen described a new, geometry-based planetary model, describing the motions of the planets in terms of spherical geometry, infinitesimal geometry and trigonometry. He kept a geocentric universe and assumed that celestial motions are uniformly circular, which required the inclusion of epicycles to explain observed motion, but he managed to eliminate Ptolemy's equant. In general, his model didn't try to provide a causal explanation of the motions, but concentrated on providing a complete, geometric description that could explain observed motions without the contradictions inherent in Ptolemy's model. Other astronomical works Alhazen wrote a total of twenty-five astronomical works, some concerning technical issues such as Exact Determination of the Meridian, a second group concerning accurate astronomical observation, a third group concerning various astronomical problems and questions such as the location of the Milky Way; Alhazen made the first systematic effort of evaluating the Milky Way's parallax, combining Ptolemy's data and his own. He concluded that the parallax is (probably very much) smaller than Lunar parallax, and the Milky way should be a celestial object. Though he was not the first who argued that the Milky Way does not belong to the atmosphere, he is the first who did quantitative analysis for the claim. The fourth group consists of ten works on astronomical theory, including the Doubts and Model of the Motions discussed above. Mathematical works In mathematics, Alhazen built on the mathematical works of Euclid and Thabit ibn Qurra and worked on "the beginnings of the link between algebra and geometry". He developed a formula for summing the first 100 natural numbers, using a geometric proof to prove the formula. Geometry Alhazen explored what is now known as the Euclidean parallel postulate, the fifth postulate in Euclid's Elements, using a proof by contradiction, and in effect introducing the concept of motion into geometry. He formulated the Lambert quadrilateral, which Boris Abramovich Rozenfeld names the "Ibn al-Haytham–Lambert quadrilateral". He was criticised by Omar Khayyam who pointed that Aristotle had condemned the use of motion in geometry. In elementary geometry, Alhazen attempted to solve the problem of squaring the circle using the area of lunes (crescent shapes), but later gave up on the impossible task. The two lunes formed from a right triangle by erecting a semicircle on each of the triangle's sides, inward for the hypotenuse and outward for the other two sides, are known as the lunes of Alhazen; they have the same total area as the triangle itself. Number theory Alhazen's contributions to number theory include his work on perfect numbers. In his Analysis and Synthesis, he may have been the first to state that every even perfect number is of the form 2n−1(2n − 1) where 2n − 1 is prime, but he was not able to prove this result; Euler later proved it in the 18th century, and it is now called the Euclid–Euler theorem. Alhazen solved problems involving congruences using what is now called Wilson's theorem. In his Opuscula, Alhazen considers the solution of a system of congruences, and gives two general methods of solution. His first method, the canonical method, involved Wilson's theorem, while his second method involved a version of the Chinese remainder theorem. Calculus Alhazen discovered the sum formula for the fourth power, using a method that could be generally used to determine the sum for any integral power. He used this to find the volume of a paraboloid. He could find the integral formula for any polynomial without having developed a general formula. Other works Influence of Melodies on the Souls of Animals Alhazen also wrote a Treatise on the Influence of Melodies on the Souls of Animals, although no copies have survived. It appears to have been concerned with the question of whether animals could react to music, for example whether a camel would increase or decrease its pace. Engineering In engineering, one account of his career as a civil engineer has him summoned to Egypt by the Fatimid Caliph, Al-Hakim bi-Amr Allah, to regulate the flooding of the Nile River. He carried out a detailed scientific study of the annual inundation of the Nile River, and he drew plans for building a dam, at the site of the modern-day Aswan Dam. His field work, however, later made him aware of the impracticality of this scheme, and he soon feigned madness so he could avoid punishment from the Caliph. Philosophy In his Treatise on Place, Alhazen disagreed with Aristotle's view that nature abhors a void, and he used geometry in an attempt to demonstrate that place (al-makan) is the imagined three-dimensional void between the inner surfaces of a containing body. Abd-el-latif, a supporter of Aristotle's philosophical view of place, later criticized the work in Fi al-Radd 'ala Ibn al-Haytham fi al-makan (A refutation of Ibn al-Haytham's place) for its geometrization of place. Alhazen also discussed space perception and its epistemological implications in his Book of Optics. In "tying the visual perception of space to prior bodily experience, Alhazen unequivocally rejected the intuitiveness of spatial perception and, therefore, the autonomy of vision. Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things." Alhazen came up with many theories that shattered what was known of reality at the time. These ideas of optics and perspective did not just tie into physical science, rather existential philosophy. This led to religious viewpoints being upheld to the point that there is an observer and their perspective, which in this case is reality. Theology Alhazen was a Muslim and most sources report that he was a Sunni and a follower of the Ash'ari school.Kaminski, Joseph J. "The Trajectory of the Development of Islamic ThoughtA Comparison Between Two Earlier and Two Later Scholars." The Contemporary Islamic Governed State. Palgrave Macmillan, Cham, 2017. 31–70. "For example, Ibn al-Haytham and Abū Rayhān al-Bīrūnī were among the most important medieval scholars who used the scientific method in their approach to natural science, and they were both Ash'arites" Ziauddin Sardar says that some of the greatest Muslim scientists, such as Ibn al-Haytham and Abū Rayhān al-Bīrūnī, who were pioneers of the scientific method, were themselves followers of the Ashʿari school of Islamic theology. Like other Ashʿarites who believed that faith or taqlid should apply only to Islam and not to any ancient Hellenistic authorities, Ibn al-Haytham's view that taqlid should apply only to prophets of Islam and not to any other authorities formed the basis for much of his scientific skepticism and criticism against Ptolemy and other ancient authorities in his Doubts Concerning Ptolemy and Book of Optics. Alhazen wrote a work on Islamic theology in which he discussed prophethood and developed a system of philosophical criteria to discern its false claimants in his time. He also wrote a treatise entitled Finding the Direction of Qibla by Calculation in which he discussed finding the Qibla, where prayers (salat) are directed towards, mathematically. There are occasional references to theology or religious sentiment in his technical works, e.g. in Doubts Concerning Ptolemy: In The Winding Motion: Regarding the relation of objective truth and God: Legacy Alhazen made significant contributions to optics, number theory, geometry, astronomy and natural philosophy. Alhazen's work on optics is credited with contributing a new emphasis on experiment. His main work, Kitab al-Manazir (Book of Optics), was known in the Muslim world mainly, but not exclusively, through the thirteenth-century commentary by Kamāl al-Dīn al-Fārisī, the Tanqīḥ al-Manāẓir li-dhawī l-abṣār wa l-baṣā'ir. In al-Andalus, it was used by the eleventh-century prince of the Banu Hud dynasty of Zaragossa and author of an important mathematical text, al-Mu'taman ibn Hūd. A Latin translation of the Kitab al-Manazir was made probably in the late twelfth or early thirteenth century. This translation was read by and greatly influenced a number of scholars in Christian Europe including: Roger Bacon, Robert Grosseteste, Witelo, Giambattista della Porta, Leonardo da Vinci, Galileo Galilei, Christiaan Huygens, René Descartes, and Johannes Kepler. Meanwhile, in the Islamic world, Alhazen's work influenced Averroes' writings on optics, and his legacy was further advanced through the 'reforming' of his Optics by Persian scientist Kamal al-Din al-Farisi (died c. 1320) in the latter's Kitab Tanqih al-Manazir (The Revision of [Ibn al-Haytham's] Optics). Alhazen wrote as many as 200 books, although only 55 have survived. Some of his treatises on optics survived only through Latin translation. During the Middle Ages his books on cosmology were translated into Latin, Hebrew and other languages. Although only one commentary on Alhazen's optics has survived the Islamic Middle Ages, Geoffrey Chaucer mentions the work in The Canterbury Tales: "They spoke of Alhazen and Vitello, And Aristotle, who wrote, in their lives, On strange mirrors and optical instruments." The impact crater Alhazen on the Moon is named in his honour, as was the asteroid 59239 Alhazen. In honour of Alhazen, the Aga Khan University (Pakistan) named its Ophthalmology endowed chair as "The Ibn-e-Haitham Associate Professor and Chief of Ophthalmology". Alhazen, by the name Ibn al-Haytham, is featured on the obverse of the Iraqi 10,000-dinar banknote issued in 2003, and on 10-dinar notes from 1982. The 2015 International Year of Light celebrated the 1000th anniversary of the works on optics by Ibn Al-Haytham. Commemorations In 2014, the "Hiding in the Light" episode of Cosmos: A Spacetime Odyssey, presented by Neil deGrasse Tyson, focused on the accomplishments of Ibn al-Haytham. He was voiced by Alfred Molina in the episode. Over forty years previously, Jacob Bronowski presented Alhazen's work in a similar television documentary (and the corresponding book), The Ascent of Man. In episode 5 (The Music of the Spheres), Bronowski remarked that in his view, Alhazen was "the one really original scientific mind that Arab culture produced", whose theory of optics was not improved on till the time of Newton and Leibniz. H. J. J. Winter, a British historian of science, summing up the importance of Ibn al-Haytham in the history of physics wrote: After the death of Archimedes no really great physicist appeared until Ibn al-Haytham. If, therefore, we confine our interest only to the history of physics, there is a long period of over twelve hundred years during which the Golden Age of Greece gave way to the era of Muslim Scholasticism, and the experimental spirit of the noblest physicist of Antiquity lived again in the Arab Scholar from Basra. UNESCO declared 2015 the International Year of Light and its Director-General Irina Bokova dubbed Ibn al-Haytham 'the father of optics'. Amongst others, this was to celebrate Ibn Al-Haytham's achievements in optics, mathematics and astronomy. An international campaign, created by the 1001 Inventions organisation, titled 1001 Inventions and the World of Ibn Al-Haytham featuring a series of interactive exhibits, workshops and live shows about his work, partnering with science centers, science festivals, museums, and educational institutions, as well as digital and social media platforms. The campaign also produced and released the short educational film 1001 Inventions and the World of Ibn Al-Haytham. List of works According to medieval biographers, Alhazen wrote more than 200 works on a wide range of subjects, of which at least 96 of his scientific works are known. Most of his works are now lost, but more than 50 of them have survived to some extent. Nearly half of his surviving works are on mathematics, 23 of them are on astronomy, and 14 of them are on optics, with a few on other subjects. Not all his surviving works have yet been studied, but some of the ones that have are given below. Book of Optics (كتاب المناظر) Analysis and Synthesis (مقالة في التحليل والتركيب) Balance of Wisdom (ميزان الحكمة) Corrections to the Almagest (تصويبات على المجسطي) Discourse on Place (مقالة في المكان) Exact Determination of the Pole (التحديد الدقيق للقطب) Exact Determination of the Meridian (رسالة في الشفق) Finding the Direction of Qibla by Calculation (كيفية حساب اتجاه القبلة) Horizontal Sundials (المزولة الأفقية) Hour Lines (خطوط الساعة) Doubts Concerning Ptolemy (شكوك على بطليموس) Maqala fi'l-Qarastun (مقالة في قرسطون) On Completion of the Conics (إكمال المخاريط) On Seeing the Stars (رؤية الكواكب) On Squaring the Circle (مقالة فی تربیع الدائرة) On the Burning Sphere (المرايا المحرقة بالدوائر) On the Configuration of the World (تكوين العالم) On the Form of Eclipse (مقالة فی صورة ‌الکسوف) On the Light of Stars (مقالة في ضوء النجوم) On the Light of the Moon (مقالة في ضوء القمر) On the Milky Way (مقالة في درب التبانة) On the Nature of Shadows (كيفيات الإظلال) On the Rainbow and Halo (مقالة في قوس قزح) Opuscula (Minor Works) Resolution of Doubts Concerning the Almagest (تحليل شكوك حول الجست) Resolution of Doubts Concerning the Winding Motion The Correction of the Operations in Astronomy (تصحيح العمليات في الفلك) The Different Heights of the Planets (اختلاف ارتفاع الكواكب) The Direction of Mecca (اتجاه القبلة) The Model of the Motions of Each of the Seven Planets (نماذج حركات الكواكب السبعة) The Model of the Universe (نموذج الكون) The Motion of the Moon (حركة القمر) The Ratios of Hourly Arcs to their Heights The Winding Motion (الحركة المتعرجة) Treatise on Light (رسالة في الضوء) Treatise on Place (رسالة في المكان) Treatise on the Influence of Melodies on the Souls of Animals (تأثير اللحون الموسيقية في النفوس الحيوانية) كتاب في تحليل المسائل الهندسية (A book in engineering analysis) الجامع في أصول الحساب (The whole in the assets of the account) قول فی مساحة الکرة (Say in the sphere) القول المعروف بالغریب فی حساب المعاملات (Saying the unknown in the calculation of transactions) خواص المثلث من جهة العمود (Triangle properties from the side of the column) رسالة فی مساحة المسجم المکافی (A message in the free space) شرح أصول إقليدس (Explain the origins of Euclid) المرايا المحرقة بالقطوع (The burning mirrors of the rainbow) مقالة في القرصتن (Treatise on Centers of Gravity) Lost works A Book in which I have Summarized the Science of Optics from the Two Books of Euclid and Ptolemy, to which I have added the Notions of the First Discourse which is Missing from Ptolemy's Book Treatise on Burning Mirrors Treatise on the Nature of [the Organ of] Sight and on How Vision is Achieved Through It See also "Hiding in the Light" History of mathematics Theoretical physics History of optics History of physics History of science History of scientific method Hockney–Falco thesis Mathematics in medieval Islam Physics in medieval Islam Science in the medieval Islamic world Fatima al-Fihri Islamic Golden Age Notes References Sources Reprinted in (Books I-III (2001) Vol 1 Commentary and Latin text via JSTOR; Vol 2 English translation I: TOC pp. 339–41, II: TOC pp. 415–16, III: TOC pp. 559–60, Notes 681ff, Bibl. via JSTOR) (Books 4–5 (2006) 95 4 – Vol 1 Commentary and Latin text via JSTOR; 95 5 – Vol 2 English translation IV: TOC pp. 289–94, V: TOC pp. 377–84, Notes, Bibl. via JSTOR) (Book 6 (2008) 98 (#1, section 1) – Vol 1 Commentary and Latin text via JSTOR; 98 (#1, section 2) – Vol 2 English translation VI:TOC pp. 155–160, Notes, Bibl. via JSTOR) (Book 7 (2010) 100(#3, section 1) – Vol 1 Commentary and Latin text via JSTOR; 100(#3, section 2) – Vol 2 English translation VII: TOC pp. 213–18, Notes, Bibl. via JSTOR) Further reading Primary 2 vols: . (Philadelphia: American Philosophical Society), 2006 – 95(#2) Books 4–5 Vol 1 Commentary and Latin text via JSTOR; 95(#3) Vol 2 English translation, Notes, Bibl. via JSTOR Smith, A. Mark, ed. and trans. (2008) Alhacen on Image-formation and distortion in mirrors : a critical edition, with English translation and commentary, of Book 6 of Alhacen's De aspectibus, [the Medieval Latin version of Ibn al-Haytham's Kitāb al-Manāzir], Transactions of the American Philosophical Society, 2 vols: Vol 1 98(#1, section 1 – Vol 1 Commentary and Latin text); 98(#1, section 2 – Vol 2 English translation). (Philadelphia: American Philosophical Society), 2008. Book 6 (2008) Vol 1 Commentary and Latin text via JSTOR; Vol 2 English translation, Notes, Bibl. via JSTOR Smith, A. Mark, ed. and trans. (2010) Alhacen on Refraction : a critical edition, with English translation and commentary, of Book 7 of Alhacen's De aspectibus, [the Medieval Latin version of Ibn al-Haytham's Kitāb al-Manāzir], Transactions of the American Philosophical Society, 2 vols: 100(#3, section 1 – Vol 1, Introduction and Latin text); 100'''(#3, section 2 – Vol 2 English translation). (Philadelphia: American Philosophical Society), 2010. Book 7 (2010) Vol 1 Commentary and Latin text via JSTOR;Vol 2 English translation, Notes, Bibl. via JSTOR Secondary Belting, Hans, Afterthoughts on Alhazen's Visual Theory and Its Presence in the Pictorial Theory of Western Perspective, in: Variantology 4. On Deep Time Relations of Arts, Sciences and Technologies in the Arabic-Islamic World and Beyond, ed. by Siegfried Zielinski and Eckhard Fürlus in cooperation with Daniel Irrgang and Franziska Latell (Cologne: Verlag der Buchhandlung Walther König, 2010), pp. 19–42. Graham, Mark. How Islam Created the Modern World. Amana Publications, 2006. Roshdi Rashed, Optics and Mathematics: Research on the history of scientific thought in Arabic, Variorum reprints, Aldershot, 1992. Roshdi Rashed, Geometry and Dioptrics the tenth century: Ibn Sahl al-Quhi and Ibn al-Haytham (in French), Les Belles Lettres, Paris, 1993 Roshdi Rashed, Infinitesimal Mathematics, vols. 1–5, al-Furqan Islamic Heritage Foundation, London, 1993–2006 Siegfried Zielinski & Franziska Latell, How One Sees'', in: Variantology 4. On Deep Time Relations of Arts, Sciences and Technologies in the Arabic-Islamic World and Beyond, ed. by Siegfried Zielinski and Eckhard Fürlus in cooperation with Daniel Irrgang and Franziska Latell (Cologne: Verlag der Buchhandlung Walther König, 2010), pp. 19–42. Buchhandlung Walther-König - KWB 45: Variantology 4 External links (PDF version) 'A Brief Introduction on Ibn al-Haytham' based on a lecture delivered at the Royal Society in London by Nader El-Bizri Ibn al-Haytham on two Iraqi banknotes The Miracle of Light – a UNESCO article on Ibn al-Haytham Biography from Malaspina Global Portal Short biographies on several "Muslim Heroes and Personalities" including Ibn al-Haytham Biography from Trinity College (Connecticut) Biography from Molecular Expressions The First True Scientist from BBC News Over the Moon From The UNESCO Courier on the occasion of the International Year of Astronomy 2009 The Mechanical Water Clock Of Ibn Al-Haytham, Muslim Heritage Alhazen's (1572) Opticae thesaurus (English) – digital facsimile from the Linda Hall Library 960s births 1040 deaths 10th-century mathematicians 11th-century astronomers 11th-century mathematicians Scholars under the Buyid dynasty Mathematicians from the Fatimid Caliphate Iraqi astronomers Mathematicians under the Buyid dynasty Iraqi scientists Engineers of the medieval Islamic world Medieval physicists Philosophers of the medieval Islamic world Philosophers of science Natural philosophers People from Basra Precursors of photography Scientists who worked on qibla determination Inventors of the medieval Islamic world History of scientific method History of optics 11th-century inventors

1649

https://en.wikipedia.org/wiki/Almoravid%20dynasty

Almoravid dynasty

The Almoravid dynasty () was an imperial Berber Muslim dynasty centered in the territory of present-day Morocco. It established an empire in the 11th century that stretched over the western Maghreb and Al-Andalus, starting in the 1050s and lasting until its fall to the Almohads in 1147. The dynasty emerged from a coalition of the Lamtuna, Gudala, and Massufa, nomadic Berber tribes living in what is now Mauritania and the Western Sahara, traversing the territory between the Draa, the Niger, and the Senegal rivers. During their expansion into the Maghreb, the Almoravids founded the city of Marrakesh as a capital, . The Almoravids were crucial in preventing the fall of Al-Andalus (Muslim rule in Iberia) to the Iberian Christian kingdoms, when they decisively defeated a coalition of the Castilian and Aragonese armies at the Battle of Sagrajas in 1086. This enabled them to control an empire that stretched north to south. Their rulers never claimed the title of caliph and instead took on the title of Amir al-Muslimīn ("Prince of the Muslims") while formally acknowledging the overlordship of the Abbasid Caliphs in Baghdad. However, the rule of the dynasty was relatively short-lived. The Almoravids fell—at the height of their power—when they failed to stop the Masmuda-led rebellion initiated by Ibn Tumart. As a result, their last king Ishaq ibn Ali was killed in Marrakesh in April 1147 by the Almohad Caliphate, which replaced them as a ruling dynasty both in the Maghreb and Al-Andalus. Name The term "Almoravid" comes from the Arabic "" (), through the . The transformation of the in "" to the in is an example of betacism in Spanish. In Arabic, "" literally means "one who is tying" but figuratively means "one who is ready for battle at a fortress". The term is related to the notion of , a North African frontier monastery-fortress, through the root r-b-t ( "": to tie, to unite or "": to encamp). The name "Almoravid" was tied to a school of Malikite law called "Dar al-Murabitin" founded in Sus al-Aksa, modern day Morocco, by a scholar named Waggag ibn Zallu. Ibn Zallu sent his student Abdallah ibn Yasin to preach Malikite Islam to the Sanhaja Berbers of the Adrar (present-day Mauritania). Hence, the name of the Almoravids comes from the followers of the Dar al-Murabitin, "the house of those who were bound together in the cause of God." It is uncertain exactly when or why the Almoravids acquired that appellation. Al-Bakri, writing in 1068, before their apex, already calls them the al-Murabitun, but does not clarify the reasons for it. Writing three centuries later, Ibn Abi Zar suggested it was chosen early on by Abdallah ibn Yasin because, upon finding resistance among the Gudala Berbers of Adrar (Mauritania) to his teaching, he took a handful of followers to erect a makeshift ribat (monastery-fortress) on an offshore island (possibly Tidra island, in the Bay of Arguin). Ibn 'Idhari wrote that the name was suggested by Ibn Yasin in the "persevering in the fight" sense, to boost morale after a particularly hard-fought battle in the Draa valley , in which they had taken many losses. Whichever explanation is true, it seems certain the appellation was chosen by the Almoravids for themselves, partly with the conscious goal of forestalling any tribal or ethnic identifications. The name might be related to the ribat of Waggag ibn Zallu in the village of Aglu (near present-day Tiznit), where the future Almoravid spiritual leader Abdallah ibn Yasin got his initial training. The 13th-century Moroccan biographer Ibn al-Zayyat al-Tadili, and Qadi Ayyad before him in the 12th century, note that Waggag's learning center was called Dar al-Murabitin (The house of the Almoravids), and that might have inspired Ibn Yasin's choice of name for the movement. Contemporaries frequently referred to them as the al-mulathimun ("the veiled ones", from , Arabic for "veil"). The Almoravids veiled themselves below the eyes with a tagelmust, a custom they adapted from southern Sanhaja Berbers (this can still be seen among the modern Tuareg people, but it was unusual further north). Although practical for the desert dust, the Almoravids insisted on wearing the veil everywhere, as a badge of "foreignness" in urban settings, partly as a way of emphasizing their puritan credentials. It served as the uniform of the Almoravids. Under their rule, sumptuary laws forbade anybody else from wearing the veil, thereby making it the distinctive dress of the ruling class. In turn, the succeeding Almohads made a point of mocking the Almoravid veil as symbolic of effeminacy and decadence. History Origins The Berbers of the Maghreb in the early Middle Ages could be roughly classified into three major groups: the Zenata across the north, the Masmuda, concentrated in central Morocco, and the Sanhaja, clustered in the western part of the Sahara and the hills of the eastern Maghreb. The eastern Sanhaja included the Kutama Berbers, who had been the base of the Fatimid rise in the early 10th century, and the Zirid dynasty, who ruled Ifriqiya as vassals of the Fatimids after the latter moved to Egypt in 972. The western Sanhaja were divided into several tribes: the Gazzula and the Lamta in the Draa valley and the foothills of the Anti-Atlas range; further south, encamped in the western Sahara, were the Massufa, the Banu Warith; and most southerly of all, the Lamtuna and Gudala, in littoral Mauritania down to the borderlands of the Senegal River. The western Sanhaja had been converted to Islam some time in the 9th century. They were subsequently united in the 10th century and, with the zeal of new converts, launched several campaigns against the "Sudanese" (pagan peoples of sub-Saharan Africa). Under their king Tinbarutan ibn Usfayshar, the Sanhaja Lamtuna erected (or captured) the citadel of Aoudaghost, a critical stop on the trans-Saharan trade route. After the collapse of the Sanhaja union, Aoudaghost passed over to the Ghana Empire; and the trans-Saharan routes were taken over by the Zenata Maghrawa of Sijilmasa. The Maghrawa also exploited this disunion to dislodge the Sanhaja Gazzula and Lamta out of their pasturelands in the Sous and Draa valleys. Around 1035, the Lamtuna chieftain Abu Abdallah Muhammad ibn Tifat (alias Tarsina), tried to reunite the Sanhaja desert tribes, but his reign lasted less than three years. Around 1040, Yahya ibn Ibrahim, a chieftain of the Gudala (and brother-in-law of the late Tarsina), went on pilgrimage to Mecca. On his return, he stopped by Kairouan in Ifriqiya, where he met Abu Imran al-Fasi, a native of Fez and a jurist and scholar of the Sunni Maliki school. At this time, Ifriqiya was in ferment. The Zirid ruler, al-Mu'izz ibn Badis, was openly contemplating breaking with his Shi'ite Fatimid overlords in Cairo, and the jurists of Kairouan were agitating for him to do so. Within this heady atmosphere, Yahya and Abu Imran fell into conversation on the state of the faith in their western homelands, and Yahya expressed his disappointment at the lack of religious education and negligence of Islamic law among his southern Sanhaja people. With Abu Imran's recommendation, Yahya ibn Ibrahim made his way to the ribat of Waggag ibn Zelu in the Sous valley of southern Morocco, to seek out a Maliki teacher for his people. Waggag assigned him one of his residents, Abdallah ibn Yasin. Abdallah ibn Yasin was a Gazzula Berber, and probably a convert rather than a born Muslim. His name can be read as "son of Ya-Sin" (the title of the 36th surah of the Quran), suggesting he had obliterated his family past and was "re-born" of the Holy Book. Ibn Yasin certainly had the ardor of a puritan zealot; his creed was mainly characterized by a rigid formalism and a strict adherence to the dictates of the Quran, and the Orthodox tradition. (Chroniclers such as al-Bakri allege Ibn Yasin's learning was superficial.) Ibn Yasin's initial meetings with the Guddala people went poorly. As he had more ardor than depth, Ibn Yasin's arguments were disputed by his audience. He responded to questioning with charges of apostasy and handed out harsh punishments for the slightest deviations. The Guddala soon had enough and expelled him almost immediately after the death of his protector, Yahya ibn Ibrahim, sometime in the 1040s. Ibn Yasin, however, found a more favorable reception among the neighboring Lamtuna people. Probably sensing the useful organizing power of Ibn Yasin's pious fervor, the Lamtuna chieftain Yahya ibn Umar al-Lamtuni invited the man to preach to his people. The Lamtuna leaders, however, kept Ibn Yasin on a careful leash, forging a more productive partnership between them. Invoking stories of the early life of Muhammad, Ibn Yasin preached that conquest was a necessary addendum to Islamicization, that it was not enough to merely adhere to God's law, but necessary to also destroy opposition to it. In Ibn Yasin's ideology, anything and everything outside of Islamic law could be characterized as "opposition". He identified tribalism, in particular, as an obstacle. He believed it was not enough to urge his audiences to put aside their blood loyalties and ethnic differences, and embrace the equality of all Muslims under the Sacred Law, it was necessary to make them do so. For the Lamtuna leadership, this new ideology dovetailed with their long desire to refound the Sanhaja union and recover their lost dominions. In the early 1050s, the Lamtuna, under the joint leadership of Yahya ibn Umar and Abdallah ibn Yasin—soon calling themselves the al-Murabitin (Almoravids)—set out on a campaign to bring their neighbors over to their cause. Expansion Early conquests In the early 1050s, a kind of triumvirate emerged in leading the Almoravid movement, including Abdallah Ibn Yasin, Yahya Ibn Umar and his brother Abu Bakr Ibn Umar. The movement was now dominated by the Lamtuna rather than the Guddala. During the 1050s the Almoravids began their expansion and their conquest of the Saharan tribes. Their first major targets were two strategic cities located at the northern and southern edges of desert: Sijilmasa in the north and Awdaghust (Aoudaghost). Control of these two cities would allow the Almoravids to effectively control the trans-Saharan trade routes. Sijilmasa was controlled by the Maghrawa, a part of the northern Zenata Berber confederation, while Awdaghust was controlled by the Soninke. Both cities were captured in 1054 or 1055. Sijilmasa was captured first and its leader, Mas'ud Ibn Wannudin, was killed, along with other Maghrawa leaders. According to historical sources, the Almoravid army rode on camels and numbered 30,000, though this number may be an exaggeration. Strengthened with the spoils of their victory, they left a garrison of Lamtuna tribesmen in the city and then turned south to capture Awdaghust, which they accomplished that same year. Although the town was mainly Muslim, the Almoravids pillaged the city and treated the population harshly on the basis that they recognized the pagan king of Ghana. Not long after the main Almoravid army left Sijilmasa the city rebelled and the Maghrawa returned, slaughtering the Lamtuna garrison. Ibn Yasin responded by organizing a second expedition to recapture it, but the Guddala refused to join him and returned instead to their homelands in the desert regions along the Atlantic coast. Historian Amira Bennison suggests that some Almoravids, including the Guddala, were unwilling to be dragged into a conflict with the powerful Zanata tribes of the north and this created tension with those, like Ibn Yasin, who saw northern expansion as the next step in their fortunes. While Ibn Yasin went north, Yahya Ibn Umar remained in the south in the Adrar, the heartland of the Lamtuna, in a defensible and well-provisioned place called Jabal Lamtuna, about 10 kilometres northwest of modern Atar. His stronghold there was a fortress called Azuggi (also rendered variably as Azougui or Azukki), which had been built earlier by his brother Yannu ibn Umar al-Hajj. Some scholars, including Attilio Gaudio, Christiane Vanacker, and Brigitte Himpan and Diane Himpan-Sabatier describe Azuggi as the "first capital" of the Almoravids. Yahya ibn Umar was subsequently killed in battle against the Guddala in 1055 or 1056, or later in 1057. Meanwhile, Ibn Yasin in the north had ordered Abu Bakr to take command of the Almoravid army and they soon recaptured Sijilmasa. By 1056, they had conquered Taroudant and the Sous Valley, continuing to impose Maliki Islamic law over the communities they conquered. When the campaign concluded that year, they retired to Sijilmasa and established their base there. It was around this time that Abu Bakr appointed his cousin, Yusuf ibn Tashfin, to command the garrison of the city. In 1058 they crossed the High Atlas and conquered Aghmat, a prosperous commercial town near the foothills of the mountains, and made it their capital. They then came in contact with the Barghawata, a Berber tribal confederation who followed an Islamic "heresy" preached by Salih ibn Tarif three centuries earlier. The Barghawata occupied the region northwest of Aghmat and along the Atlantic coast. They resisted the Almoravids fiercely and the campaign against them was bloody. Abdullah ibn Yasin was killed in battle with them in 1058 or 1059, at a place called Kurīfalalt or Kurifala. By 1060, however, they were conquered by Abu Bakr ibn Umar and were forced to convert to orthodox Islam. Shortly after this, Abu Bakr had reached as far as Meknes. Towards 1068, Abu Bakr married a noble and wealthy Berber woman, Zaynab an-Nafzawiyyah, who would become very influential in the development of the dynasty. Zaynab was the daughter of a wealthy merchant from Kairouan who had settled in Aghmat. She had been previously married to Laqut ibn Yusuf ibn Ali al-Maghrawi, the ruler of Aghmat, until the latter was killed during the Almoravid conquest of the city. Founding of Marrakesh and internal division It was around this time that Abu Bakr ibn Umar founded the new capital of Marrakesh. Historical sources cite a variety of dates for this event ranging from 1062, given by Ibn Abi Zar and Ibn Khaldun, to 1078 (470 AH), given by Muhammad al-Idrisi. The year 1070, given by Ibn Idhari, is more commonly used by modern historians, although 1062 is still cited by some writers. Shortly after founding the new city, Abu Bakr was compelled to return south to the Sahara in order to suppress a rebellion by the Guddala and their allies which threatened the desert trade routes, in either 1060 or 1071. His wife Zaynab appears to have been unwilling to follow him south and he granted her a divorce. Apparently on Abu Bakr's instructions, she was then married to Yusuf Ibn Tashfin. Before leaving, Abu Bakr appointed Ibn Tashfin as his deputy in charge of the new Almoravid territories in the north. According to Ibn Idhari, Zaynab became his most important political advisor. A year later, after suppressing the revolt in the south, Abu Bakr returned north toward Marrakesh, expecting to resume his control of the city and of the Almoravid forces in North Africa. Ibn Tashfin, however, was now unwilling to give up his own position of leadership. While Abu Bakr was still camped near Aghmat, Ibn Tashfin sent him lavish gifts but refused to obey his summons, reportedly on the advice of Zaynab. Abu Bakr recognized that he was unable to force the issue and was unwilling to fight a battle over control of Marrakesh, so he decided to voluntarily recognize Ibn Tashfin's leadership in the Maghreb. The two men met on neutral ground between Aghmat and Marrakesh to confirm the arrangement. After a short stay in Aghmat, Abu Bakr returned south to continue his leadership of the Almoravids in the Sahara. Following this, the Almoravid Empire was divided into two distinct but co-dependent parts: one led by Ibn Tashfin in the north, and another led by Abu Bakr in the south. Abu Bakr continued to be formally acknowledged as the supreme leader of the Almoravids until his death in 1087. Historical sources give no indication that the two leaders treated each other other as enemies and Ibn Tashfin continued to mint coins in Abu Bakr's name until the latter's death. Following Abu Bakr's departure, Ibn Tashfin was largely responsible for building the Almoravid state in the Maghreb over the next two decades. One of Abu Bakr's sons, Ibrahim, who served as the Almoravid leader in Sijilmasa between 1071 and 1076 (according to the coinage minted there), did develop a rivalry with Ibn Tashfin and attempted to confront him toward 1076. He marched to Aghmat with the intention of reclaiming his father's position in the Maghreb. Another Almoravid commander, Mazdali ibn Tilankan, who was related to both men, diffused the situation and convinced Ibrahim to join his father in the south rather than start a civil war. Further conquests in the Maghreb Ibn Tashfin had in the meantime helped to bring the large area of what is now Morocco, Western Sahara, and Mauritania under Almoravid control. He spent at least several years capturing each fort and settlement in the region around Fez and in northern Morocco. After most of the surrounding region was under his control, he was finally able to conquer Fez definitively. However, there is some contradiction and uncertainty among historical sources regarding the exact chronology of these conquests, with some sources dating the main conquests to the 1060s and others dating them to the 1070s. Some modern authors cite the date of the final conquest of Fez as 1069 (461 AH). Historian Ronald Messier gives the date more specifically as 18 March 1070 (462 AH). Other historians date this conquest to 1074 or 1075. In 1079 Ibn Tashfin sent an army 20,000 strong from Marrakesh to push towards what is now Tlemcen to attack the Banu Ya'la, the Zenata tribe occupying the area. Led by Mazdali Ibn Tilankan, the army defeated the Banu Ya'la in battle near the valley of the Moulaya River and executed their commander, Mali Ibn Ya'la, the son of Tlemcen's ruler. However, Ibn Tilankan did not push to Tlemcen right away as the city of Oujda, occupied by the Bani Iznasan, was too strong to capture. Instead, Ibn Tashfin himself returned with an army in 1081 that captured Oujda and then conquered Tlemcen, massacring the Maghrawa forces there and their leader, al-Abbas Ibn Bakhti al-Maghrawi. He pressed on and by 1082 he had captured Algiers. Ibn Tashfin subsequently treated Tlemcen as his eastern base. At that time the city had consisted of an older settlement called Agadir, but Ibn Tashfin founded a new city next to it called Takrart, which later merged with Agadir in the Almohad period to become the present city. The Almoravids subsequently clashed with the Hammadids to the east multiple times, but they did not make a sustained effort to conquer the central Maghrib and instead focused their efforts on other fronts. Eventually, in 1104, they signed a peace treaty with the Hammadids. Algiers became their easternmost outpost. Before campaigning in Al-Andalus, where the Taifas emirs were requesting his help, Ibn Tashfin made the capture of Ceuta his primary objective instead. Ceuta, controlled by Zenata forces under the command of Diya al-Dawla Yahya, was the last major city on the African side of the Strait of Gibraltar that still held out against him. In return for a promise to help him against the encroaching Christian kingdoms, Ibn Tashfin demanded that al-Mu'tamid ibn Abbad, the ruler of Seville, provide assistance in besieging the city. Al-Mu'tamid obliged and sent a fleet to blockade the city by sea, while Ibn Tashfin's son Tamim led the siege by land. The city finally surrendered in June–July 1083 or in August 1084. Under Ibn Tashfin, the western Maghreb was divided into well-defined administrative provinces for the first time – prior to this, it had been mostly tribal territory. A developing central government was established in Marrakesh, while Ibn Tashfin entrusted key provinces to important allies and relatives. The nascent Almoravid state was funded in part by the taxes allowed under Islamic law and by the gold that came from Ghana in the south, but in practice it remained dependent on the spoils of new conquests. The majority of the Almoravid army continued to be composed of Sanhaja recruits, but Ibn Tashfin also began recruiting slaves to form a personal guard (ḥashm), including 5000 black soldiers ('abid) and 500 white soldiers (uluj, likely of European origin). Southern Almoravids and the Ghana Empire After leaving Yusuf Ibn Tashfin in the north and returning south, Abu Bakr Ibn Umar reportedly made Azuggi his base. The town acted as the capital of the southern Almoravids under him and his successors. Despite the importance of the Saharan trade routes to the Almoravids, the history of the southern wing of the empire is not well documented in Arabic historical sources and is often neglected in histories of the Maghreb and al-Andalus. This has also encouraged a division in modern studies about the Almoravids, with archeology playing a greater role in the study of the southern wing, in the absence of more textual sources. The exact nature and impact of the Almoravid presence in the Sahel is a strongly debated topic among Africanists. According to Arab tradition, the Almoravids under Abu Bakr's leadership conquered the Ghana Empire, founded by the Soninke, sometime around 1076–77. An example of this tradition is the record of historian Ibn Khaldun, who cited Shaykh Uthman, the faqih of Ghana, writing in 1394. According to this source, the Almoravids weakened Ghana and collected tribute from the Sudan, to the extent that the authority of the rulers of Ghana dwindled away, and they were subjugated and absorbed by the Sosso, a neighboring people of the Sudan. Traditions in Mali related that the Sosso attacked and took over Mali as well, and the ruler of the Sosso, Sumaouro Kanté, took over the land. However, criticism from Conrad and Fisher (1982) argued that the notion of any Almoravid military conquest at its core is merely perpetuated folklore, derived from a misinterpretation or naive reliance on Arabic sources. According to Professor Timothy Insoll, the archaeology of ancient Ghana simply does not show the signs of rapid change and destruction that would be associated with any Almoravid-era military conquests. Dierke Lange agreed with the original military incursion theory but argues that this doesn't preclude Almoravid political agitation, claiming that the main factor of the demise of the Ghana Empire owed much to the latter. According to Lange, Almoravid religious influence was gradual, rather than the result of military action; there the Almoravids gained power by marrying among the nation's nobility. Lange attributes the decline of ancient Ghana to numerous unrelated factors, one of which is likely attributable to internal dynastic struggles instigated by Almoravid influence and Islamic pressures, but devoid of military conquest. This interpretation of events has been disputed by later scholars like Sheryl L. Burkhalter, who argued that, whatever the nature of the "conquest" in the south of the Sahara, the influence and success of the Almoravid movement in securing west African gold and circulating it widely necessitated a high degree of political control. The traditional position says that the ensuing war with the Almoravids pushed Ghana over the edge, ending the kingdom's position as a commercial and military power by 1100. It collapsed into tribal groups and chieftaincies, some of which later assimilated into the Almoravids while others founded the Mali Empire. The Arab geographer Ibn Shihab al-Zuhri wrote that the Almoravids ended Ibadi Islam in Tadmekka in 1084 and that Abu Bakr "arrived at the mountain of gold" in the deep south. Abu Bakr finally died in Tagant in November 1087 following an injury in battle—according to oral tradition, from an arrow – while fighting in the historic region of the Sudan. After the death of Abu Bakr (1087), the confederation of Berber tribes in the Sahara was divided between the descendants of Abu Bakr and his brother Yahya, and would have lost control of Ghana. Sheryl Burkhalter suggests that Abu Bakr's son Yahya was the leader of the Almoravid expedition that conquered Ghana in 1076, and that the Almoravids would have survived the loss of Ghana and the defeat in the Maghreb by the Almohads, and would have ruled the Sahara until the end of the 12th century. Iberian Peninsula and the northern wing In 1086 Yusuf ibn Tashfin was invited by the Muslim taifa princes of Al-Andalus in the Iberian Peninsula to defend their territories from the encroachment of Alfonso VI, King of León and Castile. In that year, Ibn Tashfin crossed the Strait of Gibraltar to Algeciras, and defeated Castile at the Battle of Sagrajas. He was prevented from following up his victory by trouble in Africa, which he chose to settle in person. He returned to Iberia in 1090, avowedly for the purpose of annexing the taifa principalities of Iberia. He was supported by most of the Iberian people, who were discontented with the heavy taxation imposed upon them by their spendthrift rulers. Their religious teachers, as well as others in the east (most notably, al-Ghazali in Persia and al-Turtushi in Egypt, who was himself an Iberian by birth from Tortosa), detested the taifa rulers for their religious indifference. The clerics issued a fatwa (a non-binding legal opinion) that Yusuf was of sound morals and had the religious right to dethrone the rulers, whom he saw as heterodox in their faith. By 1094, Yusuf had annexed most of the major taifas, with the exception of the one at Zaragoza. The Almoravids were victorious at the Battle of Consuegra, during which the son of El Cid, Diego Rodríguez, perished. Alfonso, with some Leónese, retreated into the castle of Consuegra, which was besieged for eight days until the Almoravids withdrew to the south. After friendly correspondence with the caliph at Baghdad, whom he acknowledged as Amir al-Mu'minin ("Commander of the Faithful"), Yusuf ibn Tashfin in 1097 assumed the title of Amir al Muslimin ("Commander of the Muslims"). He died in 1106, when he was reputed to have reached the age of 100. The Almoravid power was at its height at Yusuf's death: the Moorish empire then included all of Northwest Africa as far eastward as Algiers, and all of Iberia south of the Tagus and as far eastward as the mouth of the Ebro, and including the Balearic Islands. In 1108 Tamim Al Yusuf defeated the Kingdom of Castile at the Battle of Uclés. Yusuf did not reconquer much territory from the Christian kingdoms, except that of Valencia; but he did hinder the progress of the Christian Reconquista by uniting al-Andalus. In 1134, at the Battle of Fraga, the Almoravids were victorious and even succeeded in slaying Alfonso the Battler in the battle. Decline Under Yusuf's son and successor, Ali ibn Yusuf, Sintra and Santarém were added, and he invaded Iberia again in 1119 and 1121, but the tide had turned, as the French had assisted the Aragonese to recover Zaragoza. In 1138, Ali ibn Yusuf was defeated by Alfonso VII of León and Castile, and in the Battle of Ourique (1139), by Afonso I of Portugal, who thereby won his crown. Lisbon was conquered by the Portuguese in 1147. According to some scholars, Ali ibn Yusuf represented a new generation of leadership that had forgotten the desert life for the comforts of the city. He was defeated by the combined action of his Christian foes in Iberia and the agitation of the Almohads (Muwahhids) in Morocco. After Ali ibn Yusuf's death in 1143, his son Tashfin ibn Ali lost ground rapidly before the Almohads. In 1146 he was killed in a fall from a precipice while attempting to escape after a defeat near Oran. His two successors were Ibrahim ibn Tashfin and Ishaq ibn Ali, but their reigns were short. The conquest of the city of Marrakesh by the Almohads in 1147 marked the fall of the dynasty, though fragments of the Almoravids continued to struggle throughout the empire. Among these fragments, there was the rebel Yahya Al-Sahrāwiyya, who resisted Almohad rule in the Maghreb for eight years after the fall of Marrakesh before surrendering in 1155. Also in 1155, the remaining Almoravids were forced to retreat to the Balearic Islands and later Ifriqiya under the leadership of the Banu Ghaniya, who were eventually influential in the downfall of their conquerors, the Almohads, in the Eastern part of the Maghreb. Culture Religion The Almoravid movement started as a conservative Islamic reform movement inspired by the Maliki school of jurisprudence. The writings of Abu Imran al-Fasi, a Moroccan Maliki scholar, influenced Yahya Ibn Ibrahim and the early Almoravid movement. Art Amira Bennison describes the art of the Almoravid period as influenced by the "integration of several areas into a single political unit and the resultant development of a widespread Andalusi–Maghribi style", as well as the tastes of the Sanhaja rulers as patrons of art. Bennison also challenges Robert Hillenbrand's characterization of the art of al-Andalus and the Maghreb as provincial and peripheral in consideration of Islamic art globally, and of the contributions of the Almoravids as "sparse" as a result of the empire's "puritanical fervour" and "ephemerality." At first, the Almoravids, subscribing to the conservative Maliki school of Islamic jurisprudence, rejected what they perceived as decadence and a lack of piety among the Iberian Muslims of the Andalusi taifa kingdoms. However, monuments and textiles from Almería from the late Almoravid period indicate that the empire had changed its attitude with time. Artistic production under the Almoravids included finely constructed minbars produced in Córdoba; marble basins and tombstones in Almería; fine textiles in Almería, Málaga, Seville; and luxury ceramics. Marble work A large group of marble tombstones have been preserved from the first half of the 12th century. They were crafted in Almería in Al-Andalus, at a time when it was a prosperous port city under Almoravid control. The tombstones were made of Macael marble, which was quarried locally, and carved with extensive Kufic inscriptions that were sometimes adorned with vegetal or geometric motifs. These demonstrate that the Almoravids not only reused Umayyad marble columns and basins, but also commissioned new works. The inscriptions on them are dedicated to various individuals, both men and women, from a range of different occupations, indicating that such tombstones were relatively affordable. The stones take the form of either rectangular stelae or of long horizontal prisms known as mqabriyyas (similar to the ones found in the much later Saadian Tombs of Marrakesh). They have been found in many locations across West Africa and Western Europe, which is evidence that a wide-reaching industry and trade in marble existed. A number of pieces found in France were likely acquired from later pillaging. Some of the most ornate tombstones found outside Al-Andalus were discovered in Gao-Saney in the African Sahel, testament to the reach of Almoravid influence into the African continent. Two Almoravid-period marble columns have also been found reused as spolia in later monuments in Fes. One is incorporated into the window of the Dar al-Muwaqqit (timekeeper's house) overlooking the courtyard of the Qarawiyyin Mosque, built in the Marinid period. The other is embedded into the decoration of the exterior southern façade of the Zawiya of Moulay Idris II, a structure which was rebuilt by Ismail Ibn Sharif. Textiles The fact that Ibn Tumart, leader of the Almohad movement, is recorded as having criticized Sultan Ali ibn Yusuf for "sitting on a luxurious silken cloak" at his grand mosque in Marrakesh indicates the important role of textiles under the Almoravids. Many of the remaining fabrics from the Almoravid period were reused by Christians, with examples in the reliquary of San Isidoro in León, a chasuble from Saint-Sernin in Toulouse, the Chasuble of San Juan de Ortega in the church of Quintanaortuña (near Burgos), the shroud of San Pedro de Osma, and a fragment found at the church of Thuir in the eastern Pyrenees. Some of these pieces are characterized by the appearance of Kufic or "Hispano-Kufic" woven inscriptions, with letters sometimes ending in ornamental vegetal flourishes. The Chasuble of San Juan de Ortega is one such example, made of silk and gold thread and dating to the first half of the 12th century. The Shroud of San Pedro de Osma is notable for its inscription stating "this was made in Baghdad", suggesting that it was imported. However, more recent scholarship has suggested that the textile was instead produced locally in centres such as Almeria, but that they were copied or based on eastern imports. It's even possible that the inscription was knowingly falsified in order to exaggerate its value to potential sellers; Al-Saqati of Málaga, a 12th-century writer and market inspector, wrote that there were regulations designed to prohibit the practice of making such false inscriptions. As a result of the inscription, many of these textiles are known in scholarship as the "Baghdad group", representing a stylistically coherent and artistically rich group of silken textiles seemingly dating to reign of Ali ibn Yusuf or the first half of the 12th century. Aside from the inscription, the shroud of San Pedro de Osma is decorated with images of two lions and harpies inside roundels that are ringed by images of small men holding griffins, repeating across the whole fabric. The chasuble from Saint-Sernin is likewise decorated with figural images, in this case a pair of peacocks repeating in horizontal bands, with vegetal stems separating each pair and small kufic inscriptions running along the bottom. The decorative theme of having a regular grid of roundels containing images of animals and figures, with more abstract motifs filling the spaces in between, has origins traced as far back as Persian Sasanian textiles. In subsequent periods, starting with the Almohads, these roundels with figurative imagery are progressively replaced with more abstract roundels, while epigraphic decoration becomes more prominent than before. Calligraphy and manuscript illumination In early Islamic manuscripts, Kufic was the main script used for religious texts. Western or Maghrebi Kufic evolved from the standard (or eastern) Kufic style and was marked by the transformation of the low swooping sections of letters from rectangular forms to long semi-circular forms. It is found in 10th century Qurans before the Almoravid period. Almoravid Kufic is the variety of Maghrebi Kufic script that was used as an official display script during the Almoravid period. Eventually, Maghrebi Kufic gave rise to a distinctive cursive script known as "Maghrebi", the only cursive script of Arabic derived from Kufic, which was fully formed by the early 12th century under the Almoravids. This style was commonly used in Qurans and other religious works from this period onward, but it was rarely ever used in architectural inscriptions. One version of this script during this early period is the Andalusi script, which was associated with Al-Andalus. It was usually finer and denser, and while the loops of letters below the line are semi-circular, the extensions of letters above the line continue to use straight lines that recall its Kufic origins. Another version of the script is rounder and larger, and is more associated with the Maghreb, although it is nonetheless found in Andalusi volumes too. The oldest known illuminated Quran from the western Islamic world (i.e. the Maghreb and Al-Andalus) dates from 1090, towards the end of the first Taifas period and the beginning of the Almoravid domination in Al-Andalus. It was produced either in the Maghreb or Al-Andalus and is now kept at the Uppsala University Library. Its decoration is still in the earliest phases of artistic development, lacking the sophistication of later volumes, but many of the features that were standard in later manuscripts are present: the script is written in the Maghrebi style in black ink, but the diacritics (vowels and other orthographic signs) are in red or blue, simple gold and black roundels mark the end of verses, and headings are written in gold Kufic inside a decorated frame and background. It also contains a frontispiece, of relatively simple design, consisting of a grid of lozenges variously filled with gold vegetal motifs, gold netting, or gold Kufic inscriptions on red or blue backgrounds. More sophisticated illumination is already evident in a copy of a sahih dated to 1120 (during the reign of Ali ibn Yusuf), also produced in either the Maghreb or Al-Andalus, with a rich frontispiece centered around a large medallion formed by an interlacing geometric motif, filled with gold backgrounds and vegetal motifs. A similarly sophisticated Quran, dated to 1143 (at the end of Ali ibn Yusuf's reign) and produced in Córdoba, contains a frontispiece with an interlacing geometric motif forming a panel filled with gold and a knotted blue roundel at the middle. Ceramics The Almoravid conquest of al-Andalus caused a temporary rupture in ceramic production, but it returned in the 12th century. There is a collection of about 2,000 Maghrebi-Andalusi ceramic basins or bowls () in Pisa, where they were used to decorated churches from the early 11th to fifteenth centuries. There were a number of varieties of ceramics under the Almoravids, including cuerda seca pieces. The most luxurious form was iridescent lustreware, made by applying a metallic glaze to the pieces before a second firing. This technique came from Iraq and flourished in Fatimid Egypt. Minbars The Almoravid minbars– such as the minbar of the Grand Mosque of Marrakesh commissioned by Sultan Ali ibn Yusuf (1137), or the minbar for the University of al-Qarawiyyin (1144) – expressed the Almoravids' Maliki legitimacy, their "inheritance of the Umayyad imperial role", and the extension of that imperial power into the Maghreb. Both minbars are exceptional works of marquetry and woodcarving, decorated with geometric compositions, inlaid materials, and arabesque reliefs. Architecture The Almoravid period, along with the subsequent Almohad period, is considered one of the most formative stages of Moroccan and Moorish architecture, establishing many of the forms and motifs of this style that were refined in subsequent centuries. Manuel Casamar Perez remarks that the Almoravids scaled back the Andalusi trend towards heavier and more elaborate decoration which had developed since the Caliphate of Córdoba and instead prioritized a greater balance between proportions and ornamentation. The two centers of artistic production in the Islamic west before the rise of the Almoravids were Kairouan and Córdoba, both former capitals in the region which served as sources of inspiration. The Almoravids were responsible for establishing a new imperial capital at Marrakesh, which became a major center of architectural patronage thereafter. The Almoravids adopted the architectural developments of al-Andalus, such as the complex interlacing arches of the Great Mosque in Córdoba and of the Aljaferia palace in Zaragoza, while also introducing new ornamental techniques from the east such as muqarnas ("stalactite" or "honeycomb" carvings). After taking control of Al-Andalus in the Battle of Sagrajas, the Almoravids sent Muslim, Christian and Jewish artisans from Iberia to North Africa to work on monuments. The Great Mosque in Algiers (), the Great Mosque of Tlemcen (1136) and al-Qarawiyyin (expanded in 1135) in Fez are important examples of Almoravid architecture. The Almoravid Qubba is one of the few Almoravid monuments in Marrakesh surviving, and is notable for its highly ornate interior dome with carved stucco decoration, complex arch shapes, and minor muqarnas cupolas in the corners of the structure. The central nave of the expanded Qarawiyyin Mosque notably features the earliest full-fledged example of muqarnas vaulting in the western Islamic world. The complexity of these muqarnas vaults at such an early date – only several decades after the first simple muqarnas vaults appeared in distant Iraq – has been noted by architectural historians as surprising. Another high point of Almoravid architecture is the intricate ribbed dome in front of the mihrab of the Great Mosque of Tlemcen, which likely traces its origins to the 10th-century ribbed domes of the Great Mosque of Córdoba. The structure of the dome is strictly ornamental, consisting of multiple ribs or intersecting arches forming a twelve-pointed star pattern. It is also partly see-through, allowing some outside light to filter through a screen of pierced and carved arabesque decoration that fills the spaces between the ribs. Aside from more ornamental religious structures, the Almoravids also built many fortifications, although most of these in turn were demolished or modified by the Almohads and later dynasties. The new capital, Marrakesh, initially had no city walls but a fortress known as the Ksar el-Hajjar ("Fortress of Stone") was built by the city's founder, Abu Bakr ibn Umar, in order to house the treasury and serve as an initial residence. Eventually, circa 1126, Ali Ibn Yusuf also constructed a full set of walls, made of rammed earth, around the city in response to the growing threat of the Almohads. These walls, although much restored and partly expanded in later centuries, continue to serve as the walls of the medina of Marrakesh today. The medina's main gates were also first built at this time, although many of them have since been significantly modified. Bab Doukkala, one of the western gates, is believed to have best preserved its original Almoravid layout. It has a classic bent entrance configuration, of which variations are found throughout the medieval period of the Maghreb and Al-Andalus. Elsewhere, the archaeological site of Tasghîmût, southeast of Marrakesh, and Amargu, northeast of Fes, provide evidence about other Almoravid forts. Built out of rubble stone or rammed earth, they illustrate similarities with older Hammadid fortifications, as well as an apparent need to build quickly during times of crisis. The walls of Tlemcen (present-day Algeria) were likewise partly built by the Almoravids, using a mix of rubble stone at the base and rammed earth above. In domestic architecture, none of the Almoravid palaces or residences have survived, and they are known only through texts and archaeology. During his reign, Ali Ibn Yusuf added a large palace and royal residence on the south side of the Ksar el-Hajjar (on the present site of the Kutubiyya Mosque). This palace was later abandoned and its function was replaced by the Almohad Kasbah, but some of its remains have been excavated and studied in the 20th century. These remains have revealed the earliest known example in Morocco of a riad garden (an interior garden symmetrically divided into four parts). In 1960 other excavations near Chichaoua revealed the remains of a domestic complex or settlement dating from the Almoravid period or even earlier. It consisted of several houses, two hammams, a water supply system, and possibly a mosque. On the site were found many fragments of architectural decoration which are now preserved at the Archeological Museum of Rabat. These fragments are made of deeply-carved stucco featuring Kufic and cursive Arabic inscriptions as well as vegetal motifs such as palmettes and acanthus leaves. The structures also featured painted decoration in red ochre, typically consisting of border motifs composed of two interlacing bands. Similar decoration has also been found in the remains of former houses excavated in 2006 under the 12th-century Almoravid expansion of the Qarawiyyin Mosque in Fes. In addition to the usual border motifs were larger interlacing geometric motifs as well as Kufic inscriptions with vegetal backgrounds, all executed predominantly in red. Literature The Almoravid movement has its intellectual origins in the writings and teachings of Abu Imran al-Fasi, who first inspired Yahya Ibn Ibrahim of the Guddala tribe in Kairouan. Ibn Ibrahim then inspired Abdallah ibn Yasin to organize for jihad and start the Almoravid movement. Moroccan literature flourished in the Almoravid period. The political unification of Morocco and al-Andalus under the Almoravid dynasty rapidly accelerated the cultural interchange between the two continents, beginning when Yusuf ibn Tashfin sent al-Mu'tamid ibn Abbad, former poet king of the Taifa of Seville, into exile in Tangier and ultimately Aghmat. The historians Ibn Hayyan, Al-Bakri, Ibn Bassam, and al-Fath ibn Khaqan all lived in the Almoravid period. Ibn Bassam authored , Al-Fath ibn Khaqan authored Qala'idu l-'Iqyan, and Al-Bakri authored al-Masālik wa ’l-Mamālik (Book of Roads and Kingdoms). In the Almoravid period two writers stand out: Qadi Ayyad and Avempace. Ayyad is known for having authored Kitāb al-Shifāʾ bī Taʾrif Ḥuqūq al-Muṣṭafá. Many of the Seven Saints of Marrakesh were men of letters. The muwashshah was an important form of poetry and music in the Almoravid period. Great poets from the period are mentioned in anthologies such as , Rawd al-Qirtas, and Mu'jam as-Sifr. The Moroccan historian noted that there were 104 paper mills in Fez under Yusuf ibn Tashfin in the 11th century. Military organization Abdallah ibn Yasin imposed very strict disciplinary measures on his forces for every breach of his laws. The Almoravids' first military leader, Yahya ibn Umar al-Lamtuni, gave them a good military organization. Their main force was infantry, armed with javelins in the front ranks and pikes behind, which formed into a phalanx, and was supported by camelmen and horsemen on the flanks. They also had a flag carrier at the front who guided the forces behind him; when the flag was upright, the combatants behind would stand and when it was turned down, they would sit. Al-Bakri reports that, while in combat, the Almoravids did not pursue those who fled in front of them. Their fighting was intense and they did not retreat when disadvantaged by an advancing opposing force; they preferred death over defeat. These characteristics were possibly unusual at the time. Legends After the death of El Cid, Christian chronicles reported a legend of a Turkish woman leading a band of 300 "Amazons", black female archers. This legend was possibly inspired by the ominous veils on the faces of the warriors and their dark skin colored blue by the indigo of their robes. List of rulers Sanhaja tribal leaders recognizing the spiritual authority of Abdallah ibn Yasin (d. 1058 or 1059): Yahya Ibn Ibrahim al-Jaddali (also referred to as al-Jawhar ibn Sakkum) Yahya ibn Umar al-Lamtuni (d. 1055 or 1056) Abu Bakr ibn Umar (d. 1087) Subsequent rulers: Yusuf ibn Tashfin (1061–1106, initially as Abu Bakr's lieutenant in the north) Ibrahim ibn Abu Bakr (ruler of Sijilmasa, 1070–1075) Ali ibn Yusuf (1106–1143) Tashfin ibn Ali (1143–1145) Ibrahim ibn Tashfin (1145, dethroned quickly) Ishaq ibn Ali (1145–1147) Family tree Timeline Notes References Citations Bibliography Brett, M. and E. Fentress (1996), The Berbers. Oxford: Blackwell. Hrbek, I. and J. Devisse (1988), "The Almoravids", in M. Elfasi, ed., General History of Africa, Africa from the Seventh to the Eleventh Century, UNESCO. 1992 edition, Ch. 13, pp. 336–366. Levtzion, N. and J. F. P. Hopkins, eds (1981), Corpus of Early Arabic Sources for West African History, Cambridge, UK: Cambridge University Press. 2000 edition. Moraes Farias, P. F. de (1967), "The Almoravids: Some Questions Concerning the Character of the Movement", Bulletin de l’IFAN, series B, 29:3–4, pp. 794–878. 11th century in al-Andalus 12th century in al-Andalus Medieval Algeria History of Mauritania History of Western Sahara 11th-century establishments in Africa 1147 disestablishments 12th-century disestablishments in Morocco States and territories established in 1040 States and territories disestablished in 1147 Historical transcontinental empires Former empires in Africa

1650

https://en.wikipedia.org/wiki/Aloe

Aloe

Aloe (; also written Aloë) is a genus containing over 650 species of flowering succulent plants. The most widely known species is Aloe vera, or "true aloe". It is called this because it is cultivated as the standard source for assorted pharmaceutical purposes. Other species, such as Aloe ferox, are also cultivated or harvested from the wild for similar applications. The APG IV system (2016) places the genus in the family Asphodelaceae, subfamily Asphodeloideae. Within the subfamily it may be placed in the tribe Aloeae. In the past, it has been assigned to the family Aloaceae (now included in the Asphodeloidae) or to a broadly circumscribed family Liliaceae (the lily family). The plant Agave americana, which is sometimes called "American aloe", belongs to the Asparagaceae, a different family. The genus is native to tropical and southern Africa, Madagascar, Jordan, the Arabian Peninsula, and various islands in the Indian Ocean (Mauritius, Réunion, Comoros, etc.). A few species have also become naturalized in other regions (Mediterranean, India, Australia, North and South America, Hawaiian Islands, etc.). Etymology The genus name Aloe is derived from the Arabic word alloeh, meaning "bitter and shiny substance" or from Hebrew ahalim, plural of ahal. Description Most Aloe species have a rosette of large, thick, fleshy leaves. Aloe flowers are tubular, frequently yellow, orange, pink, or red, and are borne, densely clustered and pendant, at the apex of simple or branched, leafless stems. Many species of Aloe appear to be stemless, with the rosette growing directly at ground level; other varieties may have a branched or unbranched stem from which the fleshy leaves spring. They vary in color from grey to bright-green and are sometimes striped or mottled. Some aloes native to South Africa are tree-like (arborescent). Systematics The APG IV system (2016) places the genus in the family Asphodelaceae, subfamily Asphodeloideae. In the past it has also been assigned to the families Liliaceae and Aloeaceae, as well as the family Asphodelaceae sensu stricto, before this was merged into the Asphodelaceae sensu lato. The circumscription of the genus has varied widely. Many genera, such as Lomatophyllum, have been brought into synonymy. Species at one time placed in Aloe, such as Agave americana, have been moved to other genera. Molecular phylogenetic studies, particularly from 2010 onwards, suggested that as then circumscribed, Aloe was not monophyletic and should be divided into more tightly defined genera. In 2014, John Charles Manning and coworkers produced a phylogeny in which Aloe was divided into six genera: Aloidendron, Kumara, Aloiampelos, Aloe, Aristaloe and Gonialoe. Species Over 600 species are accepted in the genus Aloe, plus even more synonyms and unresolved species, subspecies, varieties, and hybrids. Some of the accepted species are: Aloe aculeata Pole-Evans Aloe africana Mill. Aloe albida (Stapf) Reynolds Aloe albiflora Guillaumin Aloe arborescens Mill. Aloe arenicola Reynolds Aloe argenticauda Merxm. & Giess Aloe bakeri Scott-Elliot Aloe ballii Reynolds Aloe ballyi Reynolds Aloe brevifolia Mill. Aloe broomii Schönland Aloe buettneri A.Berger Aloe camperi Schweinf. Aloe capitata Baker Aloe comosa Marloth & A.Berger Aloe cooperi Baker Aloe corallina Verd. Aloe dewinteri Giess ex Borman & Hardy Aloe erinacea D.S.Hardy Aloe excelsa A.Berger Aloe ferox Mill. Aloe forbesii Balf.f. Aloe helenae Danguy Aloe hereroensis Engl. Aloe inermis Forssk. Aloe inyangensis Christian Aloe jawiyon S.J.Christie, D.P.Hannon & Oakman ex A.G.Mill. Aloe jucunda Reynolds Aloe khamiesensis Pillans Aloe kilifiensis Christian Aloe maculata All. Aloe marlothii A.Berger Aloe mubendiensis Christian Aloe namibensis Giess Aloe nyeriensis Christian & I.Verd. Aloe pearsonii Schönland Aloe peglerae Schönland Aloe perfoliata L. Aloe perryi Baker Aloe petricola Pole-Evans Aloe polyphylla Pillans Aloe rauhii Reynolds Aloe reynoldsii Letty Aloe scobinifolia Reynolds & Bally Aloe sinkatana Reynolds Aloe squarrosa Baker ex Balf.f. Aloe striata Haw. Aloe succotrina Lam. Aloe suzannae Decary Aloe thraskii Baker Aloe vera (L.) Burm.f. Aloe viridiflora Reynolds Aloe wildii (Reynolds) Reynolds In addition to the species and hybrids between species within the genus, several hybrids with other genera have been created in cultivation, such as between Aloe and Gasteria (× Gasteraloe), and between Aloe and Astroloba (×Aloloba). Uses Aloe species are frequently cultivated as ornamental plants both in gardens and in pots. Many aloe species are highly decorative and are valued by collectors of succulents. Aloe vera is used both internally and externally on humans as folk or alternative medicine. The Aloe species is known for its medicinal and cosmetic properties. Around 75% of Aloe species are used locally for medicinal uses. The plants can also be made into types of special soaps or used in other skin care products (see natural skin care). Numerous cultivars with mixed or uncertain parentage are grown. Of these, Aloe ‘Lizard Lips’ has gained the Royal Horticultural Society’s Award of Garden Merit. Aloe variegata has been planted on graves in the superstitious belief that this ensures eternal life. Historical uses Historical use of various aloe species is well documented. Documentation of the clinical effectiveness is available, although relatively limited. Of the 500+ species, only a few were used traditionally as herbal medicines, Aloe vera again being the most commonly used species. Also included are A. perryi and A. ferox. The Ancient Greeks and Romans used Aloe vera to treat wounds. In the Middle Ages, the yellowish liquid found inside the leaves was favored as a purgative. Unprocessed aloe that contains aloin is generally used as a laxative, whereas processed juice does not usually contain significant aloin. Some species, particularly Aloe vera, are used in alternative medicine and first aid. Both the translucent inner pulp and the resinous yellow aloin from wounding the aloe plant are used externally for skin discomforts. As an herbal medicine, Aloe vera juice is commonly used internally for digestive discomfort. According to Cancer Research UK, a potentially deadly product called T-UP is made of concentrated aloe, and promoted as a cancer cure. They say "there is currently no evidence that aloe products can help to prevent or treat cancer in humans". Aloin in OTC laxative products On May 9, 2002, the US Food and Drug Administration issued a final rule banning the use of aloin, the yellow sap of the aloe plant, for use as a laxative ingredient in over-the-counter drug products. Most aloe juices today do not contain significant aloin. Chemical properties According to W. A. Shenstone, two classes of aloins are recognized: (1) nataloins, which yield picric and oxalic acids with nitric acid, and do not give a red coloration with nitric acid; and (2) barbaloins, which yield aloetic acid (C7H2N3O5), chrysammic acid (C7H2N2O6), picric and oxalic acids with nitric acid, being reddened by the acid. This second group may be divided into a-barbaloins, obtained from Barbados Aloe, and reddened in the cold, and b-barbaloins, obtained from Aloe Socotrina and Zanzibar Aloe, reddened by ordinary nitric acid only when warmed or by fuming acid in the cold. Nataloin (2C17H13O7·H2O) forms bright-yellow scales, barbaloin (C17H18O7) prismatic crystals. Aloe species are used in essential oils as a safety measure to dilute the solution before they are applied to the skin. Flavoring Aloe perryi, A. barbadensis, A. ferox, and hybrids of this species with A. africana and A. spicata are listed as natural flavoring substances in the US government Electronic Code of Federal Regulations. Aloe socotrina is said to be used in yellow Chartreuse. Heraldic occurrence Aloe rubrolutea occurs as a charge in heraldry, for example in the Civic Heraldry of Namibia. Gallery See also List of Aloe species List of ineffective cancer treatments List of Southern African indigenous trees References Further reading External links Asphodelaceae genera Laxatives Cosmetics chemicals Succulent plants

1690

https://en.wikipedia.org/wiki/Amati

Amati

Amati (, ) is the last name of a family of Italian violin makers who lived at Cremona from about 1538 to 1740. Their importance is considered equal to those of the Bergonzi, Guarneri, and Stradivari families. Today, violins created by Nicolò Amati are valued at around $600,000. Because of their age and rarity, Amati instruments are mostly kept in museum or private collections and are seldom played in public. Family members Andrea Amati Andrea Amati (20 December 1577) designed and created the violin, viola and cello known as the "violin family". Based in Cremona, Italy, he standardized the basic form, shape, size, materials and method of construction. Makers from nearby Brescia experimented, such as Gasparo da Salò, Micheli, Zanetto and Pellegrino, but it was Andrea Amati who gave the modern violin family their definitive profile. A claim that Andrea Amati received the first order for a violin from Lorenzo de' Medici in 1555 is invalid as Lorenzo de' Medici died in 1492. A number of Andrea Amati's instruments survived for some time, dating between 1538 (Amati made the first Cello called "The King" in 1538) and 1574. The largest number of these are from 1560, a set for an entire orchestra of 38 ordered by Catherine de Médicis the regent queen of France and bore hand painted royal French decorations in gold including the motto and coat of arms of her son Charles IX of France. Of these 38 instruments ordered, Amati created violins of two sizes, violas of two sizes and large-sized cellos. They were in use until the French revolution of 1789 and only 14 of these instruments survived. His work is marked by selection of the finest materials, great elegance in execution, soft clear amber, soft translucent varnish, and an in depth use of acoustic and geometrical principles in design. Antonio and Girolamo Amati Andrea Amati was succeeded by his sons Antonio Amati (–1607) and Girolamo Amati (–1630). "The Brothers Amati", as they were known, implemented far-reaching innovations in design, including the perfection of the shape of the f-holes. They are also thought to have pioneered the modern alto format of viola, in contrast to older tenor violas, but the widespread belief that they were the first ones to do so Nicolò Amati Nicolò Amati (3 December 159612 April 1684) was the son of Girolamo Amati. He was the most eminent of the family. He improved the model adopted by the rest of the Amatis and produced instruments capable of yielding greater power of tone. His pattern was unusually small, but he also made a wider model now known as the "Grand Amati", which have become his most sought-after violins. Of his pupils, the most famous were Antonio Stradivari and Andrea Guarneri, the first of the Guarneri family of violin makers. (There is much controversy regarding the apprenticeship of Antonio Stradivari. While the label on Stradivari's first known violin states that he was a pupil of Amati, the validity of his statement is questioned. Girolamo Amati (Hieronymus II) The last maker of the family was Nicolò's son, Girolamo Amati, known as Hieronymus II (26 February 164921 February 1740). He improved the arching of his father's instruments. Extant Amati instruments Amati instruments include some of the oldest extant examples of the violin family, dating to as far back as the mid-16th century. , they are only occasionally played in public. United Kingdom Instruments in the UK include Andrea Amati violins from the set delivered to Charles IX of France in 1564. Amati instruments at the Ashmolean Museum, Oxford. Andrea Amati Violin, 1564 (ex–French royal collection) Viola Amati instruments at the Royal Academy of Music Museum, London Amati instrument at the Tullie House Museum and Art Gallery, Carlisle Andrea Amati Violin, 1564 (ex French royal collection) Nicolò Amati Double bass of 1631 played by Chi-chi Nwanoku United States Amati instruments at the Metropolitan Museum of Art (New York) Andrea Amati: Violin, Nicolò Amati: Violin, 1669 Amati instruments at the National Music Museum (University of South Dakota): Andrea Amati: "The King", circa 1545, the world's oldest extant cello Viola, 1560 Violin, 1560 Violin, 1574 Girolamo Amati: Double bass, 1680 Violin, 1604 Violin, 7/8-size, 1609 Violino piccolo, 1613 Nicolò Amati: Violin, 1628 Violas The Stanley Solomon Tenore ca 1536 Andrea Amati ca 1536 Originally a tenor viola, the front is of pine of slightly wavy grain of medium width. The back is one-piece of maple, slab-cut, slightly flamed but with evident circular decorations. The little scroll is later, but it matches the instrument. The varnish is golden brown. Archivio della Liuteria Cremonese Tarisio The Witten, The IX Charles, The ex Collis ca 1560 Andrea Amati ca 1560 This rare viola is one of the best preserved of Andrea Amati's decorated instruments. It features gilt paintings of fleurs-de-lis and trefoils on its back, surrounding the monogram identified by Italian scholar Renato Meucci to be that of Marguerite de Valois-Angoulême. The Latin motto painted in gilt around the monogram, as well as around the ribs, is identical to that found on the Museum's Amati violin made at about the same time and may relate to the court of King Philip II of Spain. The loss of some of the mottoes' text, as well as other decorative elements painted on the back, clearly reveals that this instrument was reduced in both length and width from its original, large tenor dimensions. Fine Strings National Music Museum, The University of South Dakota National Music Museum, The University of South Dakota Tarisio From the Charles IX Set ca 1564 Andrea Amati ca 1564 Large tenor viola with Charles IX decoration. Two-piece back of small-figured maple, bearing the royal insignia and motto. Top of pine of varying grain. Original scroll. Golden-brown varnish. Label not original: "Andrea Amadi in Cremona M. D. L. xxiiij." (1574). Tarisio Tarisio Held at the Ashmolean Museum Oxford Andrea Amati ca 1564 Ashmolean Museum Oxford The ex Wahl ca 1568 Andrea Amati ca 1568 Two-piece back with an ebony inlay of "Chinese-knot" design. Scroll not original. Label not original, dated 1568. Strings Magazine Tarisio The ex Herrmann ca 1620 Antonio & Girolamo Amati ca 1620 Northern Italian viola attributed to Andrea Amati. Made, in our opinion, circa 1620 by a member of the Amati school. The head by another maker. The back is from one piece of slab cut maple with faint irregular flames. The sides are from slab cut maple similar to the back. The scroll is from quarter cut maple with faint narrow flames. The top is from two pieces of spruce with medium and narrow grain. The dimensions are somewhat reduced. The varnish has a golden brown color. Labelled "ANDREAS AMATIUS CREMONA 1567". Christie's Featured in . The Violetta ca 1570 Andrea Amati ca 1570 Two-piece back. The painted decoration is the coat of arms of the Spanish crown. Top with two small wings in the lower bouts. Scroll not original. Labeled "Niccolaus & Antonius Fratres Amati, Cremonem Fes...1649." Tarisio The Trampler ca 1580 Antonio & Girolamo Amati ca 1580–90 This instrument was cut down in size around 1800 from an original length of about 47 cm. The ribs are painted with the inscription: "Non AEtesin Homine sed Virtus Consideramus". Although the instrument comes with a certificate from Simone F. Sacconi attributing it to the Brothers Amati circa 1620, both Charles Beare and Jacques Francais believe it to be a work of Andrea Amati, possibly completed by the Brothers Amati, in which case its date would be closer to 1580. Tarisio Featured in . The Henry IV ca 1590 Girolamo Amati ca 1590 One-piece back, covered with a painting of the armorial bearings of Henry IV supported on each side by an angel. Top of spruce with an open and well-defined grain. Scroll: of faint narrow curl. Ribs of wood similar to back, inscribed in gilt letters "Dvo Proteci Tvnvs". Red-brown varnish. Tarisio Featured in . The Crocfisso, The Medecia ca 1594 Antonio & Girolamo Amati, ca 1594 Commissioned for the Medici family, known as the 'Viola Medicea' or the 'Viola del Crocifisso' after the crucifix decoration on its back. The Strad The Stauffer ca 1615 Antonio & Girolamo Amati ca 1615 One-piece back of medium curl sloping from left to right. Top of distinct grain, broadening slightly towards the flanks. Scroll of wood similar to back. Ribs of wood similar to back. Golden-brown varnish. Labeled "Antonius & Hieronymus Fr. Amati Cremonen. Andreæ fil. F 1615." Tarisio The Zukerman, The Kashkashian ca 1617 Antonio & Girolamo Amati ca 1617 Two-piece back. Dendrochronology report by Peter Ratcliff dates the youngest ring of bass and treble sides as 1613. Tarisio Held by the Cincinnati Art Museum ca 1619 Antonio & Girolamo Amati ca 1619 Cincinnati Art Museum The Medici, The Hamma ca 1619 Antonio & Girolamo Amati ca 1619 Two-piece back. Tarizio Held by the Royal Academy of Music London ca 1620 Antonio & Girolamo Amati ca 1620 One of the few surviving tenors which has not been reduced in size for modern playing. The head is particularly beautiful and well proportioned. The cheeks are flat, in the style of a cello head, although not so wide as to obstruct the player's left hand. The long and elegant pegbox tapers to a wide throat beneath the perfectly carved scroll. The volutes are hollowed and gather depth from the second through to the narrow final turn. The figured quarter-sawn maple used for the back and sides of the instrument is of a type commonly used by the Amatis. The continuous slope of the flame across the centre joint (achieved by reversing one half of the back before jointing), rather than the mirror-image pattern most commonly seen, is also a feature of their work. The front is of straight and even close-grained spruce. Royal Academy of Music London Tarisio The ex Wittgenstein ca 1620 Antonio & Girolamo Amati ca 1620 Two-piece back; the wax seal below the button depicts a woman's head. Top of narrow grain, widening towards the flanks. Scroll of wood similar to back. Ribs of wood similar to back. Golden-brown varnish. Labeled "Antonio & Hieronimus Fr. Amati / Cremonen Andrea F 1620." Tarisio Ingles & Hayday Held in the Galleria Estense Modena ca 1625 Girolamo Amati ca 1625 Labelled "Antonius, & Hieronymus, Fr. Amati Cremonen. Andrae fil. F.1620" (not original). Back of maple. Top of spruce with a pronounced, rather wide grain. Ribs of the same maple as the back. The subject of the book The Girolamo Amati viola in the Galleria Estense, Treasures of Italian Violin Making Vol I, 2014 The ex Vieuxtemps Nicolò Amati, date unknown Tarisio Nicolo Amati ca 1663 Two-piece spruce top of medium width grain widening to the edges, two-piece back of quarter sawn maple with faint flame of narrow width mostly horizontal, ribs and scroll of similar maple, and varnish of an orange-brown color over a golden ground. There is an original printed label inside the instrument reads "Nicolaus Amatus Cremonen. Hieronymi Fil. ac Antonij Nepos Fecit. 1663" National Museum of American History The Berkitz, The Romanov ca 1677 Nicolò Amati ca 1677 Tariso The Strad Shop The Strad Shop The ex Waters ca 1703 Nicolò Amati ca 1703 Toronto Symphony Orchestra Toronto Symphony Orchestra The ex Francais 1708 Girolamo Amati II ca 1708 Two-piece back of small curl. Top of pine of well-defined and rather open grain. Scroll of less pronounced curl. Ribs of less pronounced curl. Golden-brown varnish. Labeled "Hieronymus Amatus Cremonen Nicolai figlius fecit 1708." Tarisio Other Amati violas in the Tarisio archive Antonio & Girolamo Amati ca 1592 Antonio & Girolamo Amati ca 1607 Antonio & Girolamo Amati ca 1611 Antonio & Girolamo Amati ca 1616 Antonio & Girolamo Amati ca 1619 Antonio & Girolamo Amati ca 1619 Antonio & Girolamo Amati ca 1619 Antonio & Girolamo Amati ca 1620 Antonio & Girolamo Amati ca 1620 Antonio & Girolamo Amati ca 1628 In popular culture Patrick O'Brian's fictional British sea captain Jack Aubrey is described as owning a "fiddle far above his station, an Amati no less", in The Surgeon's Mate. In the Wine-Dark Sea, book fifteen of the series, Stephen Maturin now has a Girolamo Amati and Aubrey a Guarneri. In Satyajit Ray's short story Bosepukure Khoonkharapi, the fictional detective Feluda deduces that a character was murdered because he owned an Amati violin. In the manga and anime series Gunslinger Girl, Henrietta carries an Amati violin case. It contains a Fabrique Nationale P90 when on a mission, otherwise it contains a real violin. On the radio show, Yours Truly, Johnny Dollar, the January 1956 episode "The Ricardo Amerigo Matter" centered on a stolen Amati violin. In the 2022 Cormac McCarthy novels, The Passenger and Stella Maris, Alicia Western purchases an Amati violin for more than $200,000 while she is in her mid- to late teens, paying in cash from money she inherited. In Stella Maris, she relates this to her psychiatrist while in a psychiatric hospital, describing the details of the purchase and some history of the Amati instruments. McCarthy, C., The Passenger and Stella Maris, New York: Knopf (2022). See also Antonio Stradivari Amati Quartet Dom Nicolò Amati (1662–1752), Italian luthier not part of this family but who adopted this surname Luthier San Maurizio, Venice Notes References Dilworth, John (1992), "The Violin and Bow-Origins and Development" in: The Cambridge Companion to the Violin, ed. Robin Stowell. Cambridge: Cambridge University Press, pp. 1–29. External links Andrea Amati: Violin, Heilbrunn Timeline of Art History, The Metropolitan Museum of Art Instruments of the Amati family on the online database MIMO, website mimo-international.com. Amati instruments Luthiers from Cremona Italian families

1695

https://en.wikipedia.org/wiki/Amazons

Amazons

In Greek mythology, the Amazons (Ancient Greek: , singular , via Latin , ) are portrayed in a number of ancient epic poems and legends, such as the Labours of Heracles, the Argonautica and the Iliad. They were a group of female warriors and hunters, who were as skilled and courageous as men in physical agility, strength, archery, riding skills, and the arts of combat. Their society was closed to men and they only raised their daughters and returned their sons to their fathers, with whom they would only socialize briefly in order to reproduce. Courageous and fiercely independent, the Amazons, commanded by their queen, regularly undertook extensive military expeditions into the far corners of the world, from Scythia to Thrace, Asia Minor and the Aegean Islands, reaching as far as Arabia and Egypt. Besides military raids, the Amazons are also associated with the foundation of temples and the establishment of numerous ancient cities like Ephesos, Cyme, Smyrna, Sinope, Myrina, Magnesia, Pygela, etc. The texts of the original myths envisioned the homeland of the Amazons at the periphery of the then-known world. Various claims to the exact place ranged from provinces in Asia Minor (Lycia, Caria, etc.) to the steppes around the Black Sea, or even Libya (Libyan Amazon). However, authors most frequently referred to Pontus in northern Anatolia, on the southern shores of the Black Sea, as the independent Amazon kingdom where the Amazon queen resided at her capital Themiscyra, on the banks of the Thermodon river. Palaephatus, who himself might have been a fictional character, attempted to rationalize the Greek myths in his work On Unbelievable Tales. He suspected that the Amazons were probably men who were mistaken for women by their enemies because they wore clothing that reached their feet, tied up their hair in headbands, and shaved their beards. Probably the first in a long line of skeptics, he rejected any real basis for them, reasoning that because they did not exist during his time, most probably they did not exist in the past either. Decades of archaeological discoveries of burial sites of female warriors, including royalty, in the Eurasian Steppes suggest that the horse cultures of the Scythian, Sarmatian and Hittite peoples likely inspired the Amazon myth. In 2019, a grave with multiple generations of female Scythian warriors, armed and in golden headdresses, was found near Russia's Voronezh. Etymology Origin of the name The origin of the word is uncertain. It may be derived from an Iranian ethnonym *ha-mazan- 'warriors', a word attested indirectly through a derivation, a denominal verb in Hesychius of Alexandria's gloss (": 'to make war' in Persian"), where it appears together with the Indo-Iranian root *kar- 'make'. In the Persian language; "Hameh" means "all", and "Zan", nearly rhyming with the English word, "Man", means "Women/Woman". So, "Hameh Zan", when it refers to a group of people, refers to a group of women in Persian (without any elaboration or further information being explicated about the group in its "name"). It may alternatively be a Greek word descended from 'manless, without husbands' (alpha privative combined with a derivation from *man- cognate with Proto-Balto-Slavic *mangjá-, found in Czech muž) has been proposed, an explanation deemed "unlikely" by Hjalmar Frisk. A further explanation proposes Iranian *ama-janah 'virility-killing' as source. Among the ancient Greeks, the term Amazon was given a folk etymology as originating from (ἀμαζός 'breastless'), connected with an etiological tradition once claimed by Marcus Justinus who alleged that Amazons had their right breast cut off or burnt out. There is no indication of such a practice in ancient works of art, in which the Amazons are always represented with both breasts, although one is frequently covered. According to Philostratus Amazon babies were not fed just with the right breast. Author Adrienne Mayor suggests that the false etymology led to the myth. Alternative terms Herodotus used the terms Androktones () 'killers/slayers of men' and Androleteirai () 'destroyers of men, murderesses'. Amazons are called Antianeirai () 'equivalent to men' and Aeschylus used Styganor () 'those who loathe all men'. In his work Prometheus Bound and in The Suppliants, Aeschylus called the Amazons "...τὰς ἀνάνδρους κρεοβόρους τ᾽ Ἀμαζόνας" 'the unwed, flesh-devouring Amazons'. In the Hippolytus tragedy, Phaedra calls Hippolytus, 'the son of the horse-loving Amazon' (). In his Dionysiaca, Nonnus calls the Amazons of Dionysus Androphonus () 'men slaying'. Herodotus stated that in the Scythian language, the Amazons were called Oiorpata, which he explained as being from oior 'man' and pata 'to slay'. Historiography The ancient Greeks never had any doubts that the Amazons were, or had been, real. Not the only people enchanted by warlike women of nomadic cultures, such exciting tales also come from ancient Egypt, Persia, India, and China. Greek heroes of old had encounters with the queens of their martial society and fought them. However, their original home was not exactly known, thought to be in the obscure lands beyond the civilized world. As a result, for centuries scholars believed the Amazons to be purely imaginary, although there were various proposals for a historical nucleus of the Amazons in Greek historiography. Some authors preferred comparisons to cultures of Asia Minor or even Minoan Crete. The most obvious historical candidates are Lycia and Scythia and Sarmatia in line with the account by Herodotus. In his Histories (5th century BC) Herodotus claims that the Sauromatae (predecessors of the Sarmatians), who ruled the lands between the Caspian Sea and the Black Sea, arose from a union of Scythians and Amazons. Herodotus also observed rather unusual customs among the Lycians of southwest Asia Minor. The Lycians obviously followed matrilineal rules of descent, virtue, and status. They named themselves along their maternal family line and a child's status was determined by the mother's reputation. This remarkably high esteem of women and legal regulations based on maternal lines, still in effect in the 5th century BC in the Lycian regions that Herodotus had traveled to, lent him the idea that these people were descendants of the mythical Amazons. Modern historiography no longer relies exclusively on textual and artistic material, but also on the vast archaeological evidence of over a thousand nomad graves from steppe territories from the Black Sea all the way to Mongolia. Discoveries of battle-scarred female skeletons buried with their weapons (bows and arrows, quivers, and spears) prove that women warriors were not merely figments of imagination, but the product of the Scythian/Sarmatian horse-centered lifestyle. Mythology According to myth, Otrera, the first Amazon queen, is the offspring of a romance between Ares the god of war and the nymph Harmonia of the Akmonian Wood, and as such a demigoddess. Early records refer to two events in which Amazons appeared prior to the Trojan War (before 1250 BC). Within the epic context, Bellerophon, Greek hero, and grandfather of the brothers and Trojan War veterans Glaukos and Sarpedon, faced Amazons during his stay in Lycia, when King Iobates sent Bellerophon to fight the Amazons, hoping they would kill him, yet Bellerophon slew them all. The youthful King Priam of Troy fought on the side of the Phrygians, who were attacked by Amazons at the Sangarios River. Amazons in the Trojan War There are Amazon characters in Homer's Trojan War epic poem, the Iliad, one of the oldest surviving texts in Europe (around 8th century BC). The now lost epic Aethiopis (probably by Arctinus of Miletus, 6th century BC), like the Iliad and several other epics, is one of the works that in combination form the Trojan War Epic Cycle. In one of the few references to the text, an Amazon force under queen Penthesilea, who was of Thracian birth, came to join the ranks of the Trojans after Hector's death and initially put the Greeks under serious pressure. Only after the greatest effort and the help of the reinvigorated hero Achilles, the Greeks eventually triumphed. Penthesilea died fighting the mighty Achilles in single combat. Homer himself deemed the Amazon myths to be common knowledge all over Greece, which suggests that they had already been known for some time before him. He was also convinced that the Amazons lived not at its fringes, but somewhere in or around Lycia in Asia Minor - a place well within the Greek world. Troy is mentioned in the Iliad as the place of Myrine's death. Later identified as an Amazon queen, according to Diodorus (1st century BC), the Amazons under her rule invaded the territories of the Atlantians, defeated the army of the Atlantian city of Cerne, and razed the city to the ground. In Scythia The Poet Bacchylides (6th century BC) and the historian Herodotus (5th century BC) located the Amazon homeland in Pontus at the southern shores of the Black Sea, and the capital Themiscyra at the banks of the Thermodon (modern Terme river), by the modern city of Terme. Herodotus also explains how it came to be that some Amazons would eventually be living in Scythia. A Greek fleet, sailing home upon defeating the Amazons in battle at the Thermodon river, included three ships crowded with Amazon prisoners. Once out at sea, the Amazon prisoners overwhelmed and killed the small crews of the prisoner ships and, despite not having even basic navigation skills, managed to escape and safely disembark at the Scythian shore. As soon as the Amazons had caught enough horses, they easily asserted themselves in the steppe in between the Caspian Sea and the Black Sea and, according to Herodotus, would eventually assimilate with the Scythians, whose descendants were the Sauromatae, the predecessors of the Sarmatians. Amazon homeland Strabo (1st century BC) visits and confirms the original homeland of the Amazons on the plains by the Thermodon river. However, long gone and not seen again during his lifetime, the Amazons had allegedly retreated into the mountains. Strabo, however, added that other authors, among them Metrodorus of Scepsis and Hypsicrates claim that after abandoning Themiscyra, the Amazons had chosen to resettle beyond the borders of the Gargareans, an all-male tribe native to the northern foothills of the Caucasian Mountains. The Amazons and Gargareans had for many generations met in secrecy once a year during two months in spring, in order to produce children. These encounters would take place in accordance with ancient tribal customs and collective offers of sacrifices. All females were retained by the Amazons themselves, and males were returned to the Gargareans. 5th century BC poet Magnes sings of the bravery of the Lydians in a cavalry-battle against the Amazons. Heracles myth Hippolyte was an Amazon queen killed by Heracles, who had set out to obtain the queen's magic belt in a task he was to accomplish as one of the Labours of Heracles. Although neither side had intended to resort to lethal combat, a misunderstanding led to the fight. In the course of this, Heracles killed the queen and several other Amazons. In awe of the strong hero, the Amazons eventually handed the belt to Heracles. In another version, Heracles does not kill the queen, but exchanges her kidnapped sister Melanippe for the belt. Theseus myth Queen Hippolyte was abducted by Theseus, who took her to Athens, where she experienced forced marriage, sexual slavery, rape, and- as a result of forced pregnancy- bore him a son, Hippolytus. In other versions, the kidnapped Amazon is called Antiope, the sister of Hippolyte. In revenge, the Amazons invaded Greece, plundered some cities along the coast of Attica, and besieged and occupied Athens. Hippolyte, who fought on the side of Athens, according to another account was killed during the final battle along with all of the Amazons. Amazons and Dionysus According to Plutarch, the god Dionysus and his companions fought Amazons at Ephesus. The Amazons fled to Samos and Dionysus pursued them and killed a great number of them at a site since called Panaema (blood-soaked field). The Christian author Eusebius writes that during the reign of Oxyntes, one of the mythical kings of Athens, the Amazons burned down the temple at Ephesus. In another myth Dionysus unites with the Amazons to fight against Cronus and the Titans. Polyaenus writes that after Dionysus has subdued the Indians, he allies with them and the Amazons and takes them into his service, who serve him in his campaign against the Bactrians. Nonnus in his Dionysiaca reports about the Amazons of Dionysus, but states that they do not come from Thermodon. Amazons and Alexander the Great Amazons are also mentioned by biographers of Alexander the Great, who report of Queen Thalestris bearing him a child (a story in the Alexander Romance). However, other biographers of Alexander dispute the claim, including the highly regarded Plutarch. He noted a moment when Alexander's naval commander Onesicritus read an Amazon myth passage of his Alexander History to King Lysimachus of Thrace who had taken part in the original expedition. The king smiled at him and said: "And where was I, then?" The Talmud recounts that Alexander wanted to conquer a "kingdom of women" but reconsidered when the women told him: Roman and ancient Egyptian records Virgil's characterization of the Volsci warrior maiden Camilla in the Aeneid borrows from the myths of the Amazons. Philostratus, in Heroica, writes that the Mysian women fought on horses alongside the men, just as the Amazons. The leader was Hiera, wife of Telephus. The Amazons are also said to have undertaken an expedition against the Island of Leuke, at the mouth of the Danube, where the ashes of Achilles were deposited by Thetis. The ghost of the dead hero so terrified the horses, that they threw off and trampled upon the invaders, who were forced to retreat. Virgil touches on the Amazons and their queen Penthesilea in his epic Aeneid (around 20 BC). The biographer Suetonius had Julius Caesar remark in his De vita Caesarum that the Amazons once ruled a large part of Asia. Appian provides a vivid description of Themiscyra and its fortifications in his account of Lucius Licinius Lucullus' Siege of Themiscyra in 71 BC during the Third Mithridatic War. An Amazon myth has been partly preserved in two badly fragmented versions around historical people in 7th century BC Egypt. The Egyptian prince Petechonsis and allied Assyrian troops undertook a joint campaign into the Land of Women, to the Middle East at the border to India. Petechonsis initially fought the Amazons, but soon fell in love with their queen Sarpot and eventually allied with her against an invading Indian army. This story is said to have originated in Egypt independently of Greek influences. Amazon queens Sources provide names of individual Amazons, that are referred to as queens of their people, even as the head of a dynasty. Without a male companion, they are portrayed in command of their female warriors. Among the most prominent Amazon queens were: Otrera, daughter of the nymph Harmonia and god of war, Ares. She is the mother of Hippolyta, Antiope, Melanippe, and Penthesilea and the mythical founder of the Temple of Artemis in Ephesus. Hippolyte, daughter of Otrera and Ares. She is part of the Theseus and Heracles myths, in which Antiope is her sister. Alcippe, the only Amazon known to have sworn a chastity oath, belongs to her entourage. Penthesilea, who kills her sister Hippolyte in a hunting accident, comes to the aid of the hard-pressed Trojans with her warriors, is defeated by Achilles, who mourns her. Myrina, who leads a military expedition in Libya, defeats the Atlanteans, forms an alliance with the ruler of Egypt, and conquers numerous cities and islands. Thalestris, the last known Amazon queen. According to legend, she meets the Greek conqueror Alexander the Great in 330 BC. Her home is the Thermodon region, or, variably, the Gates of Alexander, south of the Caspian Sea. Lampedo and Marpesia, queens of the Amazons mentioned by Justin Various authors and chroniclers Quintus Smyrnaeus Quintus Smyrnaeus, author of the Posthomerica lists the attendant warriors of Penthesilea: "Clonie was there, Polemusa, Derinoe, Evandre, and Antandre, and Bremusa, Hippothoe, dark-eyed Harmothoe, Alcibie, Derimacheia, Antibrote, and Thermodosa glorying with the spear." Diodorus Siculus Diodorus Siculus lists twelve Amazons who challenged and died fighting Heracles during his quest for Hippolyta's girdle: Aella, Philippis, Prothoe, Eriboea, Celaeno, Eurybia, Phoebe, Deianeira, Asteria, Marpe, Tecmessa, Alcippe. After Alcippe's death, a group attack followed. Diodorus also mentions Melanippe, who Heracles set free after accepting her girdle and Antiope as ransom. Diodorus lists another group with Myrina as the queen who commanded the Amazons in a military expedition in Libya, as well as her sister Mytilene, after whom she named the city of the same name. Myrina also named three more cities after the Amazons who held the most important commands under her, Cyme, Pitane, and Priene. Justin and Paulus Orosius Both Justin in his Epitome of Trogus Pompeius and Paulus Orosius give an account of the Amazons, citing the same names. Queens Marpesia and Lampedo shared the power during an incursion in Europe and Asia, where they were slain. Marpesia's daughter Orithyia succeeded them and was greatly admired for her skill on war. She shared power with her sister Antiope, but she was engaged in war abroad when Heracles attacked. Two of Antiope's sisters were taken prisoner, Melanippe by Heracles and Hippolyta by Theseus. Heracles latter restored Melanippe to her sister after receiving the queen's arms in exchange, though, on other accounts she was killed by Telamon. They also mention Penthesilea's role in the Trojan War. Hyginus Another list of Amazons' names is found in Hyginus' Fabulae. Along with Hippolyta, Otrera, Antiope and Penthesilea, it attests the following names: Ocyale, Dioxippe, Iphinome, Xanthe, Hippothoe, Laomache, Glauce, Agave, Theseis, Clymene, Polydora. Perhaps the most important is Queen Otrera, consort of Ares and mother by him of Hippolyta and Penthesilea. She's also known for building a temple to Artemis at Ephesus. Valerius Flaccus Another different set of names is found in Valerius Flaccus' Argonautica. He mentions Euryale, Harpe, Lyce, Menippe and Thoe. Of these Lyce also appears on a fragment, preserved in the Latin Anthology where she is said to have killed the hero Clonus of Moesia, son of Doryclus, with her javelin. Late Antiquity, Middle Age and Renaissance literature Stephanus of Byzantium (7th-century CE) provides numerous alternative lists of the Amazons, including for those who died in combat against Heracles, describing them as the most prominent of their people. Both Stephanus and Eustathius connect these Amazons with the placename Thibais, which they claim to have been derived from the Amazon Thiba's name. Several of Stephanus' Amazons served as eponyms for cities in Asia Minor, like Cyme and Smyrna or Amastris, who was believed to lend her name to the city previously known as Kromna, although in fact it was named after the historical Amastris. The city Anaea in Caria was named after an Amazon. In his work Getica (on the origin and history of the Goths, ) Jordanes asserts that the Goths' ancestors, descendants of Magog, originally lived in Scythia, at the Sea of Azov between the Dnieper and Don Rivers. When the Goths were abroad campaigning against Pharaoh Vesosis, their women, on their own successfully fended off a raid by a neighboring tribe. Emboldened, the women established their own army under Marpesia, crossed the Don and invaded eastward into Asia. Marpesia's sister Lampedo remained in Europe to guard the homeland. They procreated with men once a year. These women conquered Armenia, Syria and all of Asia Minor, even reaching Ionia and Aeolis, holding this vast territory for 100 years. In Digenes Akritas, the twelfth century medieval epic of Basil, the Greco-Syrian knight of the Byzantine frontier, the hero battles and then commits adultery with the female warrior Maximo (killing her afterwards in one version of the epic), descended from some Amazons and taken by Alexander from the Brahmans. John Tzetzes lists in Posthomerica twenty Amazons, who fell at Troy. This list is unique in its attestation for all the names but Antianeira, Andromache and Hippothoe. Other than these three, the remaining 17 Amazons were named as Toxophone, Toxoanassa, Gortyessa, Iodoce, Pharetre, Andro, Ioxeia, Oistrophe, Androdaixa, Aspidocharme, Enchesimargos, Cnemis, Thorece, Chalcaor, Eurylophe, Hecate, and Anchimache. Famous medieval traveller John Mandeville mentions them in his book: Medieval and Renaissance authors credit the Amazons with the invention of the battle-axe. This is probably related to the sagaris, an axe-like weapon associated with both Amazons and Scythian tribes by Greek authors (see also Thracian tomb of Aleksandrovo kurgan). Paulus Hector Mair expresses astonishment that such a "manly weapon" should have been invented by a "tribe of women", but he accepts the attribution out of respect for his authority, Johannes Aventinus. Ariosto's Orlando Furioso contains a country of warrior women, ruled by Queen Orontea; the epic describes an origin much like that in Greek myth, in that the women, abandoned by a band of warriors and unfaithful lovers, rallied together to form a nation from which men were severely reduced, to prevent them from regaining power. The Amazons and Queen Hippolyta are also referenced in Geoffrey Chaucer's Canterbury Tales in "The Knight's Tale". Amazons continued to be subject of scholarly debate during the European Renaissance, and with the onset of the Age of Exploration, encounters were reported from ever more distant lands. In 1542, Francisco de Orellana reached the Amazon River, naming it after the , a tribe of warlike women he claimed to have encountered and fought on the Nhamundá River, a tributary of the Amazon. Afterwards the whole basin and region of the Amazon (Amazônia in Portuguese, Amazonía in Spanish) were named after the river. Amazons also figure in the accounts of both Christopher Columbus and Walter Raleigh. Amazons in art Beginning around 550 BC. depictions of Amazons as daring fighters and equestrian warriors appeared on vases. After the Battle of Marathon in 490 BC the Amazon battle - Amazonomachy became popular motifs on pottery. By the sixth century BC, public and privately displayed artwork used the Amazon imagery for pediment reliefs, sarcophagi, mosaics, pottery, jewelry and even monumental sculptures, that adorned important buildings like the Parthenon in Athens. Amazon motifs remained popular until the Roman imperial period and into Late antiquity. Apart from the artistic desire to express the passionate womanhood of the Amazons in contrast with the manhood of their enemies, some modern historians interpret the popularity of Amazon in art as indicators of societal trends, both positive and negative. Greek and Roman societies, however, utilized the Amazon mythology as a literary and artistic vehicle to unite against a commonly-held enemy. The metaphysical characteristics of Amazons were seen as personifications of both nature and religion. Roman authors like Virgil, Strabo, Pliny the Elder, Curtius, Plutarch, Arrian, and Pausanius advocated the greatness of the state, as Amazon myths served to discuss the creation of origin and identity for the Roman people. However, that changed over time. Amazons in Roman literature and art have many faces, such as the Trojan ally, the warrior goddess, the native Latin, the warmongering Celt, the proud Sarmatian, the hedonistic and passionate Thracian warrior queen, the subdued Asian city, and the worthy Roman foe. In Renaissance Europe, artists started to reevaluate and depict Amazons based on Christian ethics. Queen Elizabeth of England was associated with Amazon warrior qualities (the foremost ancient examples of feminism) during her reign and was indeed depicted as such. Though, as explained in Divina Virago by Winfried Schleiner, Celeste T. Wright has given a detailed account of the bad reputation Amazons had in the Renaissance. She notes that she has not found any Elizabethans comparing the Queen to an Amazon and suggests that they might have hesitated to do so because of the association of Amazons with enfranchisement of women, which was considered contemptible. Elizabeth was present at a tournament celebrating the marriage of the Earl of Warwick and Anne Russell at Westminster Palace on 11 November 1565 involving male riders dressed as Amazons. They accompanied the challengers carrying their heraldry. These riders wore crimson gowns, masks with long hair attached, and swords. Peter Paul Rubens and Jan Brueghel depicted the Battle of the Amazons around 1598, a most dramatic baroque painting, followed by a painting of the Rococo period by Johann Georg Platzer, also titled Battle of the Amazons. In 19th-century European Romanticism German artist Anselm Feuerbach occupied himself with the Amazons as well. His paintings engendered all the aspirations of the Romantics: their desire to transcend the boundaries of the ego and of the known world; their interest in the occult in nature and in the soul; their search for a national identity, and the ensuing search for the mythic origins of the Germanic nation; finally, their wish to escape the harsh realities of the present through immersion in an idealized past. Archaeology Speculation that the idea of Amazons contains a core of reality is based on archaeological discoveries at kurgan burial sites in the steppes of southern Ukraine and Russia. The varied war weapons artifacts found in graves of numerous high-ranking Scythian and Sarmatian warrior women have led scholars to conclude that the Amazonian legend has been inspired by the real world: About 20% of the warrior graves on the lower Don and lower Volga contained women dressed for battle similar to how men dress. Armed women accounted for up to 25% of Sarmatian military burials. Russian archaeologist Vera Kovalevskaya asserts that when Scythian men were abroad fighting or hunting, women would have to be able to competently defend themselves, their animals, and their pastures. In early 20th century Minoan archeology a theory regarding Amazon origins in Minoan civilization was raised in an essay by Lewis Richard Farnell and John Myres. According to Myres, the tradition interpreted in the light of evidence furnished by supposed Amazon cults seems to have been very similar and may have even originated in Minoan culture. Modern legacy The city of Samsun in modern-day Samsun Province, Turkey features an Amazon Village museum, to help bring attention to the legacy of the Amazons and to promote both academic interest and tourism. An annual Amazon Celebration Festival takes place in the Terme district. During the Ottoman–Egyptian invasion of Mani in 1826, in the battle of Diros the women of Mani defeated the Ottoman army and for this were given the name of 'The Amazons of Diros'. From 1936 to 1939, annual propaganda events, called Night of the Amazons (Nacht der Amazonen) were performed in Nazi Germany at the Nymphenburg Palace Park in Munich. Announced as evening highlights of the International Horse Racing Week Munich-Riem, bare-breasted variety show girls of the SS-Cavalry, 2,500 participants and international guests performed at the open-air revue. These revues served to promote an allegedly emancipated female role and a cosmopolitan and foreigner-friendly Nazi regime. In literature and media Literature Amazon Queen Hippolyta appears in William Shakespeare's play A Midsummer Night's Dream and also in The Two Noble Kinsmen, which Shakespeare co-wrote with John Fletcher. The Amazon queen Penthesilea, and her sexual frenzy, are at the center of the drama Penthesilea by Heinrich von Kleist in 1808. Steven Pressfield's 2002 novel Last of the Amazons is a mythopoeia of Plutarch's texts, that surround Theseus' abduction of Queen Antiope and the Amazons' attack on Athens. An accurate and detailed portrayal of the Archaic Greek world, its life, people, weapons etc. dramatized as real as the sky. William Moulton Marston, alongside his wife and their lover Olive Byrne, created their rendition of the mythical Amazons, whose members included the superheroine Wonder Woman, for DC Comics. Marston's Amazons are noteworthy for not just being physically superior to mortal men but also technologically superior, being able to create healing rays and undetectable jet planes that can be controlled through brain waves alone, although this element of Amazon society is applied inconsistently in appearances written after Marston's death. In Rick Riordan's The Heroes of Olympus, the Amazons appear in The Son of Neptune and The Blood of Olympus. They are the founders and owners of the Amazon corporation. In Philip Armstrong's historical-fantasy series, The Chronicles of Tupiluliuma, the Amazons appear as the Am'azzi. In the Stieg Larsson novel The Girl Who Kicked the Hornets' Nest, the Amazons appear as the transitional topics between sections of the book. Garci Rodríguez de Montalvo created the fictional queen Calafia, who ruled over a kingdom of black women, living in the style of Amazons, on the mythical Island of California. Amazon Gazonga is a short comic series created by the Waltrip brothers in 1995. The comic centres around on a young amazon named Gazonga living in the Amazon rainforest. GastroPhobia is a webcomic by Daisy McGuire, about the adventures of an exiled Amazon warrior and her son living in Ancient Greece, roughly 3408 years ago. Film and television Franchises involving several Tarzan releases, that have featured Amazon tribes (Tarzan and the Amazons, Tarzan, Lord of the Jungle) In the animated series The Mysterious Cities of Gold, a tribe of Amazons appeared in two episodes. Frank Hart, portraying a misogynist, is kidnapped by Amazons in the 1980 film 9 to 5. Amazons appear in the movies The Loves of Hercules (1960), Battle of the Amazons (1970), War Goddess (1973), Hundra (1983), Amazons (1986), Deathstalker II (1987), Ronal the Barbarian (2011), Hercules (2014) and DC Extended Universe films: Wonder Woman (2017), Justice League (2017), Wonder Woman 1984 (2020), Zack Snyder's Justice League (2021). Amazons in television series Hercules: The Legendary Journeys, Young Hercules, and Xena: Warrior Princess, The Legend of the Hidden City and Huntik: Secrets & Seekers and Supernatural. Games Amazons are featured in the following roleplay - and video games: Diablo, Heroes Unlimited, Aliens Unlimited, Amazon: Guardians of Eden, Flight of the Amazon Queen, A Total War Saga: Troy, Rome: Total War, Final Fantasy IV, Age of Wonders: Planetfall, Legend of Zelda series and Yu-Gi-Oh games. Military units Russian general and statesman Grigory Potemkin, and then favourite of Catherine the Great created an Amazons Company in 1787. Wives and daughters of the soldiers of the Greek Battalion of Balaklava were enlisted and formed this unit. The Mino, or Minon, (Our Mothers) were a late 19th to early 20th-century all-female official military regiment of the former Kingdom of Dahomey (present-day Benin). Since the early 18th-century women contingents had already joined the army, usually during deployment, in order to inflate the army size. However, women proved themselves courageous and effective in active combat, and a regular unit was established. Western observers, who had allegedly perceived certain Amazon-like physical and mental qualities in these women, came up with the trivial epithet Dahomey Amazons. Social and religious activism During the period 1905–1913, members of the militant Suffragette movement were frequently referred to as "Amazons" in books and newspaper articles. In Ukraine Katerina Tarnovska leads a group called the Asgarda which claims to be a new tribe of Amazons. Tarnovska believes that the Amazons are the direct ancestors of Ukrainian women, and she has created an all-female martial art for her group, based on another form of fighting called Combat Hopak, but with a special emphasis on self-defense. Science The Neptune trojans, asteroids 60° ahead or beyond Neptune on its orbit, are individually named after mythological Amazons. See also List of Amazons Action heroine Amazons (DC Comics) Matriarchy List of women warriors in folklore Women in the military Timeline of women in ancient warfare Ares (father of amazons) Shieldmaiden, female warrior in northern Europe Onna-bugeisha, female warrior in Japanese nobility Urduja, from Philippine mythology Women warriors in literature and culture References Sources Primary Secondary Further reading Adams, Maeve. "Amazons." The Wiley Blackwell Encyclopedia of Gender and Sexuality Studies (2016): 1–4. "AMAZONS Women of the Steppe and the Idea of the Female Warrior". In: Ball, Warwick. The Eurasian Steppe: People, Movement, Ideas. Edinburgh: Edinburgh University Press, 2022. pp. 117–135. https://doi.org/10.1515/9781474488075-010 Dowden, Ken. “THE AMAZONS: DEVELOPMENT AND FUNCTIONS”. In: Rheinisches Museum Für Philologie 140, no. 2 (1997): 97–128. http://www.jstor.org/stable/41234269. Fialko, Elena (2018). "Scythian Female Warriors in the South of Eastern Europe". In: Folia Praehistorica Posnaniensia 22 (lipiec), 29–47. https://doi.org/10.14746/fpp.2017.22.02. Guliaev, V. I. (2003). "Amazons in the Scythia: New finds at the Middle Don, Southern Russia". In: World Archaeology, 35:1, 112–125. DOI: 10.1080/0043824032000078117 Hardwick, Lorna (1990). "Ancient Amazons - Heroes, Outsiders or Women?". In: Greece & Rome, 37, pp. 14–36. doi:10.1017/S0017383500029521 Liccardo, Salvatore. "Different Gentes, Same Amazons: The Myth of Women Warriors at the Service of Ethnic Discourse." Medieval History Journal 21.2 (2018): 222–250. Mayor, Adrienne. The Amazons: Lives and Legends of Warrior Women across the Ancient World. Princeton University Press, 2014. https://doi.org/10.2307/j.ctt7zvndm. online review Maartel Bremer, Jan. "THE AMAZONS IN THE IMAGINATION OF THE GREEKS". In: Acta Antiqua 40, 1-4 (2000): 51–59. Accessed Jul 17, 2022. https://doi.org/10.1556/aant.40.2000.1-4.6 Toler, Pamela D. Women warriors: An unexpected history (Beacon Press, 2019). von Rothmer, Dietrich, Amazons in Greek Art (Oxford University Press, 1957) Vovoura, Despoina. “Women Warriors(?) And the Amazon Myth: The Evidence of Female Burials with Weapons in the Black Sea Area”. In: The Greeks and Romans in the Black Sea and the Importance of the Pontic Region for the Graeco-Roman World (7th Century BC-5th Century AD): 20 Years On (1997-2017): Proceedings of the Sixth International Congress on Black Sea Antiquities (Constanţa – 18–22 September 2017). Edited by Gocha R. Tsetskhladze, Alexandru Avram, and James Hargrave. Archaeopress, 2021. pp. 118–28. https://doi.org/10.2307/j.ctv1pdrqhw.22. Wilde, Lyn Webster. On the trail of the women warriors: The Amazons in myth and history ( Macmillan, 2000). Other languages Bergmann, F. G. Les Amazones dans l'histoire et dans la fable (1853) Klugmann, A. Die Amazonen in der attischen Literatur und Kunst (1875) Krause, H. L. Die Amazonensage (1893) Lacour, F. Les Amazones (1901) Mordtmann, Andreas David. Die Amazonen (Hanover, 1862) Pauly-Wissowa, Realencyclopädie der Classischen Altertumswissenschaft Roscher, W. H., Ausführliches Lexikon der griechischen und römischen Mythologie Santos, Theobaldo Miranda. Lendas e mitos do Brasil (Companhia Editora Nacional, 1979) Stricker, W. Die Amazonen in Sage und Geschichte (1868) External links Wounded Amazon Herodotus via Gutenberg Straight Dope: Amazons Amazon women in the Mongolian steppe Amazon mtDNA found in Mongolia The Warburg Institute Iconographic Database (images of Amazons) Legendary tribes in Greco-Roman historiography Mythology of Heracles Children of Ares Scythia Single-gender worlds Women of the Trojan war Women warriors Etymology of California Deeds of Ares

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https://en.wikipedia.org/wiki/Ambrosius%20Aurelianus

Ambrosius Aurelianus

Ambrosius Aurelianus (; Anglicised as Ambrose Aurelian and called Aurelius Ambrosius in the Historia Regum Britanniae and elsewhere) was a war leader of the Romano-British who won an important battle against the Anglo-Saxons in the 5th century, according to Gildas. He also appeared independently in the legends of the Britons, beginning with the 9th-century Historia Brittonum. Eventually, he was transformed by Geoffrey of Monmouth into the uncle of King Arthur, the brother of Arthur's father Uther Pendragon, as a ruler who precedes and predeceases them both. He also appears as a young prophet who meets the tyrant Vortigern; in this guise, he was later transformed into the wizard Merlin. According to Gildas Ambrosius Aurelianus is one of the few people whom Gildas identifies by name in his sermon De Excidio et Conquestu Britanniae, and the only one named from the 5th century. De Excidio is considered the oldest extant British document about the so-called Arthurian period of Sub-Roman Britain. Following the destructive assault of the Saxons, the survivors gather together under the leadership of Ambrosius, who is described as: Some basic information on Ambrosius can be deduced from the brief passage: Ambrosius was possibly of high birth and very likely a Christian (Gildas says that he won his battles "with God's help"). Ambrosius's parents were slain by the Saxons and he was among the few survivors of their initial invasion. According to Gildas, Ambrosius organised the survivors into an armed force and achieved the first military victory over the Saxon invaders. However, this victory was not decisive: "Sometimes the Saxons and sometimes the citizens [meaning the Romano-British inhabitants] were victorious." Due to Gildas's description of him, Ambrosius is one of the figures called the Last of the Romans. Scholarship questions Two points in Gildas's description have attracted much scholarly commentary. The first is what Gildas meant by saying Ambrosius' family "had worn the purple". Roman emperors and male Patricians wore clothes with a purple band to denote their class so the reference to purple may be to an aristocratic heritage. Roman military tribunes (tribuni militum), senior officers in Roman legions, wore a similar purple band so the reference may be to a family background of military leadership. The tradition was old, as the togas and pallia of already ancient senators and tribunes were trimmed with the purple band. In the church, "the purple" is a euphemism for blood and therefore "wearing the purple" may be a reference to martyrdom or a bishop's robe. In addition, in the later Roman Empire both Roman consuls and governors of consular rank also wore clothes with a purple fringe. The Notitia Dignitatum, a Roman catalogue of official posts, lists four or five provincial governors in Roman Britain and two of them were of consular rank. One was the governor of Maxima Caesariensis and the other that of Valentia. The parent who wore the purple may well have been one of these governors, whose names were not recorded. It has been suggested by historian Alex Woolf that Ambrosius may have been related to the 5th-century Romano-British usurpers Marcus or Gratian – Woolf expresses a preference based on nomenclature for Marcus. Frank D. Reno, an Arthurian scholar, has instead argued that the name "Aurelianus" indicates the descent of Ambrosius from the Illyrian Roman emperor Aurelian (reigned 270–275). Aurelian's military campaigns included the conquest of the Gallic Empire. N. J. Higham suggests that Ambrosius may have been distantly related to imperial families of the late Roman Empire, such as the Theodosian dynasty. Branches of this particular dynasty were known to be active in western Roman provinces like Hispania. Mike Ashley instead focuses on the name "Ambrosius" and its possible connection to Saint Ambrosius, a fourth-century Bishop of Milan, who also served as consular governor in areas of Roman Italy. The father of the Bishop is sometimes claimed to be a fourth century Praetorian prefect of Gaul named Aurelius Ambrosius, whose areas included Britain, though some modern scholars doubt that Saint Ambrosius was related to this man (instead identifying his father with an official named Uranius mentioned in an extract from the Theodosian Code). Ashley suggests that Ambrosius Aurelianus was related to the two Aurelii Ambrosii. Tim Venning points out that the name "Aurelianus" could be the result of a Roman adoption. When a boy was adopted into a new gens (clan), he received the family names of his new family but was often additionally called by a cognomen indicating his descent from his original family. The additional cognomen often had the form "-anus". When Gaius Octavius from gens Octavia was adopted by his uncle Gaius Julius Caesar, he was often distinguished from his adoptive father by the addition "Octavianus". In this case, Ambrosius may have been a member of gens Aurelia who was adopted by another gens/family. The second question is the meaning of the word avita: Gildas could have meant "ancestors", or intended it to mean more specifically "grandfather" – thus indicating Ambrosius lived about a generation before the Battle of Badon. Lack of information prevents sure answers to these questions. Gildas's motives N. J. Higham wrote a book on Gildas and the literary tropes that he used. He has suggested that Gildas may have had considerable motive for drawing attention to Ambrosius. He was not attempting to write a historical biography of the man, according to Higham, but setting him as an example to his contemporaries. It was essential to the philosophy of Gildas that Briton leaders who achieved victory over the barbarians were only able to do so because of divine aid. And only those who had superior Christian virtues were deserving of this aid. Ambrosius Aurelianus was apparently known for at least one such victory over the barbarians. To fit him into his worldview, Gildas was almost required to feature the former warrior as a man of exceptional virtues and obedience to God. He was made to fit Gildas's version of a model leader. Higham also suggests that the Roman lineage of Ambrosius was highlighted for a reason. Gildas was apparently intentionally connecting him with the legitimate authority and military virtues of the Romans. He was also contrasting him with the subsequent Briton rulers whose reigns lacked in such legitimacy. Identifying historical figures Gildas is a primary source for the Battle of Badon, yet he never mentions the names of the combatants. Therefore, we cannot know if Ambrosius Aurelianus or his successors took part in the battle. The names of the Saxon leaders in the battle are also not recorded. The identities of Ambrosius's descendants are unknown, since Gildas never identifies them by name. It is safe to assume that they were Gildas's contemporaries and known to the author. Higham suggests that they were prominent figures of the time. Their lineage and identities were probably sufficiently familiar to his intended audience that they did not have to be named. The work portrays Ambrosius's descendants as inferior to their ancestor as part of his criticism on rulers of his time, according to Higham. Those criticised were likely aware that the vitriol was intended for them, but probably would not challenge a work offering such a glowing report of their illustrious ancestor. Mike Ashley suggests that the descendants of Ambrosius could include other people named by Gildas. He favours the inclusion in this category of one Aurelius Caninus ("Aurelius the dog-like"), whom Gildas accuses of parricide, fornication, adultery, and warmongering. His name "Aurelius" suggests Romano-British descent. The insulting nickname "Caninus" was probably invented by Gildas himself, who similarly insults other contemporary rulers. Due to the name used by Gildas, there are theories that this ruler was actually named Conan/Cynan/Kenan. Some identify him with Cynan Garwyn, a 6th-century King of Powys, though it is uncertain if he was a contemporary of Gildas or lived one or two generations following him. Another theory is that this ruler did not reign in Britain but in Brittany. Caninus, in this view, might be Conomor ("Great Dog"). Conomor is considered a likelier contemporary of Gildas. Conomor was likely from Domnonée, an area of Brittany controlled by British immigrants from Dumnonia. He might be remembered in British legend as Mark of Cornwall. Gildas primarily features the Saxons as barbarian raiders; their invasions involved a slow and difficult process of military conquest. By AD 500, possibly the time described by Gildas, Anglo-Saxons controlled the Isle of Wight, Kent, Lincolnshire, Norfolk, Suffolk, and coastal areas of Northumberland and Yorkshire. The rest of the former Roman Britain was still under the control of the local Britons or remnants of the Roman provincial administration. Gildas also mentions depopulation of cities and this probably reflects historical facts. Londinium, once a major city, was completely abandoned during the 5th century. According to Bede Bede follows Gildas's account of Ambrosius in his Ecclesiastical History of the English People, but in his Chronica Majora he dates Ambrosius's victory to the reign of the Emperor Zeno (474–491). Bede's treatment of the 5th century history of Great Britain is not particularly valuable as a source. Until about the year 418, Bede could choose between several historical sources and often followed the writings of Orosius. Following the end of Orosius's history, Bede apparently lacked other available sources and relied extensively on Gildas. Entries from this period tend to be close paraphrases of Gildas's account with mostly stylistic changes. Bede's account of Ambrosius Aurelianus has been translated as following: Bede does not mention the descendants of Ambrosius Aurelianus, nor their supposed degeneracy. According to Nennius The Historia Brittonum, attributed to Nennius, preserves several snippets of lore about Ambrosius. Despite the traditional attribution, the authorship of the work and the period of its writing are open questions for modern historians. There are several extant manuscript versions of the work, varying in details. The most important ones have been dated to between the 9th and the 11th century. Some modern scholars think it unlikely that the work was composed by a single writer or compiler, suggesting that it may have taken centuries to reach its final form, though this theory is not conclusive. In Chapter 31, we are told that Vortigern ruled in fear of Ambrosius. This is the first mention of Ambrosius in the work. According to Frank D. Reno, this would indicate that Ambrosius's influence was formidable, since Vortigern considered him more of a threat than northern invaders and attempts to restore Roman rule in Britain. The chapter relates events following the end of Roman rule in Britain and preceding Vortigern's alliance with the Saxons. The most significant appearance of Ambrosius is the story about Ambrosius, Vortigern, and the two dragons beneath Dinas Emrys, "Fortress of Ambrosius" in Chapters 40–42. In this account, Ambrosius is still an adolescent but has supernatural powers. He intimidates Vortigern and the royal magicians. When it is revealed that Ambrosius is the son of a Roman consul, Vortigern is convinced to cede to the younger man the castle of Dinas Emrys and all the kingdoms in the western part of Britain. Vortigern then retreats to the north, in an area called Gwynessi. This story was later retold with more detail by Geoffrey of Monmouth in his fictionalised Historia Regum Britanniae, conflating the personage of Ambrosius with the Welsh tradition of Myrddin the visionary, known for oracular utterances that foretold the coming victories of the native Celtic inhabitants of Britain over the Saxons and the Normans. Geoffrey also introduces him into the Historia under the name Aurelius Ambrosius as one of three sons of Constantine III, along with Constans and Uther Pendragon. In Chapter 48, Ambrosius Aurelianus is described as "king among all the kings of the British nation". The chapter records that Pascent, the son of Vortigern, was granted rule over the regions of Buellt and Gwrtheyrnion by Ambrosius. Finally, in Chapter 66, various events are dated from a Battle of Guoloph (often identified with Wallop, ESE of Amesbury near Salisbury), which is said to have been between Ambrosius and Vitolinus. The author dates this battle as taking place 12 years from the reign of Vortigern. It is not clear how these various traditions about Ambrosius relate to each other, or whether they come from the same tradition; it is very possible that these references are to different men with the same name. Frank D. Reno points out that the works call all these men "Ambrosius"/"Emrys". The cognomen "Aurelianus" is never used. The Historia Brittonum dates the battle of Guoloph to "the twelfth year of Vortigern", by which the year 437 seems to be meant. This is perhaps a generation before the battle that Gildas may imply was commanded by Ambrosius Aurelianus. The text never identifies who Ambrosius's father is, just gives his title as a Roman consul. When an adolescent Ambrosius speaks of his father, there is no suggestion that this father is deceased. The boy is not identified as an orphan. The exact age of Ambrosius is not given in his one encounter with Vortigern. Frank D. Reno suggests that he might be as young as 13 years old, barely a teenager. It is impossible to know to what degree Ambrosius actually wielded political power, and over what area. Ambrosius and Vortigern are shown as being in conflict in the Historia Brittonum, and some historians have suspected that this preserves a historical core of the existence of two parties in opposition to one another, one headed by Ambrosius and the other by Vortigern. J. N. L. Myres built upon this suspicion and speculated that belief in Pelagianism reflected an actively provincial outlook in Britain and that Vortigern represented the Pelagian party, while Ambrosius led the Catholic one. Subsequent historians accepted Myres's speculation as fact, creating a narrative of events in 5th century Britain with various degrees of elaborate detail. Yet a simpler alternative interpretation of the conflict between these two figures is that the Historia Brittonum is preserving traditions hostile to the purported descendants of Vortigern, who at this time were a ruling house in Powys. This interpretation is supported by the negative character of all of the stories retold about Vortigern in the Historia Brittonum, which include his alleged practice of incest. The identity of Ambrosius's last mentioned enemy, Vitalinus, is somewhat obscure. Various manuscripts of the Historia and translations also render his name as "Guitolin," "Guitolini," and "Guitholini." He is mentioned in chapter 49 as one of four sons of Gloiu and co-founder of the city of Gloucester. No other background information is given. There are theories that Gloiu is also the father of Vortigern, but the genealogy is obscure and no supporting primary text can be found. There have been further attempts to identify Vitalinus with a pro-Vortigern or anti-Roman faction in Britain, opposed to the rise of the Romano-British Ambrosius. However, this is rendered problematic since Vitalinus seems to also have a Romano-British name. The traditional view of pro-Roman and pro-Briton factions active in this period might oversimplify a more complex situation. According to William of Malmesbury Ambrosius appears briefly in the Gesta Regum Anglorum ("Deeds of the Kings of the English") by William of Malmesbury. Despite its name, the work attempted to reconstruct British history in general by drawing together the varying accounts of Gildas, Bede, Nennius, and various chroniclers. The work features Ambrosius as the apparent employer of Arthur. The relevant passage has been translated as follows: William swiftly shifts attention from Ambrosius to Arthur, and proceeds to narrate Arthur's supposed victory in the Battle of Badon. The narrative is probably the first to connect Ambrosius and Arthur. William had to reconcile the accounts of Gildas and Bede who implied that Ambrosius was connected to the battle, and that of Nennius which clearly stated that it was Arthur who was connected to the battle. He solved the apparent discrepancy by connecting both of them to it. Ambrosius as the king of the Britons and Arthur as his most prominent general and true victor of the battle. According to Geoffrey of Monmouth Ambrosius Aurelianus appears in later pseudo-chronicle tradition beginning with Geoffrey of Monmouth's Historia Regum Britanniae with the slightly garbled name Aurelius Ambrosius, now presented as son of a King Constantine. King Constantine's eldest son Constans is murdered at Vortigern's instigation, and the two remaining sons (Ambrosius and Uther, still very young) are quickly hustled into exile in Brittany. (This does not fit with Gildas' account, in which Ambrosius' family perished in the turmoil of the Saxon uprisings.) Later, the two brothers return from exile with a large army when Vortigern's power has faded. They destroy Vortigern and become friends with Merlin. They go on to defeat the Saxon leader Hengist in two battles at Maisbeli (probably Ballifield, near Sheffield) and Cunengeburg. Hengist is executed and Ambrosius becomes king of Britain. However, he is poisoned by his enemies, and Uther succeeds him. The text identifies the poisoner as Eopa. Judgements vary wildly of the value of Geoffrey as both a historian and a literary storyteller. He has been praised for giving us detailed information about an otherwise obscure period and possibly preserving information from lost sources, and condemned for an excessive use of artistic licence and possibly inventing stories wholecloth. According to Frank D. Reno, whenever Geoffrey uses extant sources, the details in the text tend to be accurate. Assuming that he was also using sources lost to us, it may be difficult to decide which details are truthful. Reno suggests that "individual judgements" have to be made about various elements of his narrative. Geoffrey changed the word "Aurelianus" to "Aurelius", which is the name of a Roman gens. Geoffrey retains the story of Emrys and the dragons from Nennius, but identifies the figure with Merlin. Merlin is Geoffrey's version of a historical figure known as Myrddin Wyllt. Myrddin is only mentioned once in the Annales Cambriae, at an entry dated to 573. The name of Merlin is given in Latin as Ambrosius Merlinus. "Merlinus" may have been intended as the agnomen of a Roman or Romano-British individual like Ambrosius. Elements of Ambrosius Aurelianus, the traditional warrior king, are used by Geoffrey for other characters. Ambrosius' supposed supernatural powers are passed to Merlin. Geoffrey's Aurelius Ambrosius rises to the throne but dies early, passing the throne to a previously unknown brother called Uther Pendragon. The role of warrior king is shared by Uther and his son Arthur. Geoffrey also uses the character Gloiu, father of Vitalinus/Vitolinus, derived from Nennius. He names this character as a son of Claudius and appointed by his father as Duke of the Welsh. His predecessor as Duke is called Arvirargus. Assuming that Claudius and Arvirargus are supposed to be contemporaries, then this Claudius is the Roman emperor Claudius I (reigned 41–54). It seems unlikely that Claudius would have living grandsons in the 5th century, four centuries following his death. Reno suggests that Claudius II (reigned 268–270) would be a more likely "Claudius" to have living descendants in the 5th century. Geoffrey for the first time gives a genealogy of Ambrosius. He is supposedly a paternal nephew of Aldroenus, King of Brittany, son of Constantine and an unnamed Briton noblewoman, adoptive grandson (on his mother's side) of Guthelinus/Vitalinus, Bishop of London, younger brother of Constans and older brother of Uther Pendragon. Ambrosius and Uther are supposedly raised by their adoptive maternal grandfather Guthelinus/Vitalinus. It is not explicitly covered in Geoffrey's narrative, but this genealogy makes Constantine and his children descendants of Conan Meriadoc, legendary founder of the line of Kings of Brittany. Conan is also featured in the Historia Regum Britanniae, where he is appointed king by Roman emperor Magnus Maximus (reigned 383–388). Constantine's reign is placed by Geoffrey as following the Groans of the Britons mentioned by Gildas. Constantine is reported killed by a Pict and his reign is followed by a brief succession crisis. Candidates for the throne included all three sons of Constantine, but there were problems for their eventual rise to the throne. Constans was a monk, and Ambrosius and Uther were underage and still in their cradle. The crisis is resolved when Vortigern places Constans on the throne, and then serves as his chief adviser and power behind the throne. When Constans is killed by the Picts serving as bodyguards of Vortigern, Vortigern feigns anguish and has the killers executed. Ambrosius is still underage and Vortigern rises to the throne. The chronology offered by Geoffrey for the early life of Ambrosius contradicts Gildas and Nennius, and is also internally inconsistent. The Groans of the Britons involves an appeal by the Britons to Roman consul "Agitius". This person has been identified with Flavius Aetius (d. 454), magister militum ("master of soldiers") of the Western Roman Empire and consul of the year 446. The Groans are generally dated to the 440s and 450s, preceding the death of Aetius. If Geoffrey's Constantine rose to the throne immediately following the Groans, this would place his reign in this period. Geoffrey gives a 10-year reign for Constantine and his marriage lasts just as long. However the eldest son Constans is clearly older than 10 years by the time his father dies. He is already an adult candidate of the throne and has had time to follow a monastic career. Even assuming there is a time gap between the death of Constantine and the adulthood of Constans, his younger brothers have not aged at all in the narrative. Geoffrey's narrative has an underage Ambrosius, if not a literal infant, in the 460s. Accounts deriving from Gildas and Nennius place Ambrosius in the prime of his life in the same decade. Most telling is that Geoffrey has Vortigern rising to the throne in the 460s. Nennius places the rise of Vortigern in the year 425, and Vortigern is entirely absent in chronologies of the 460s. Suggesting that he was deceased by that time. Geoffrey's narrative includes as a major character Hengist, as leader of the Saxons. He is featured as the father of Queen Rowena and father-in-law of Vortigern. Other Saxon characters in the narrative tend to receive less attention by the writer, but their names tend to correspond to Anglo-Saxons known from other sources. Henginst's supposed son Octa is apparently Octa of Kent, a 6th-century ruler variously connected to Hengist as a son or descendant. The other son, Ebissa, is more difficult to identify. He might correspond to kinsmen of Hengist variously identified as "Ossa", "Oisc", and "Aesc". A minor Saxon character called "Cherdic" is probably Cerdic of Wessex, though elsewhere Geoffrey calls the same king "Cheldric". He actually may appear under three different names in the narrative, since Geoffrey elsewhere calls the interpreter of Hengist "Ceretic", a variant of the same name. Geoffrey, in the last chapters featuring Vortigern, has the king served by magicians. This detail derives from Nennius, though Nennius was talking about Vortigern's "wise men". They may not have been magic users but advisers. Vortigern's encounter with Emrys/Merlin takes place in this part of the narrative. Merlin warns Vortigern that Ambrosius and Uther have already sailed for Britain and are soon to arrive, apparently to claim his throne. Ambrosius soon arrives at the head of the army and is crowned king. He besieges Vortigern at the castle of "Genoreu", which is identified with Nennius' Cair Guorthigirn ("Fort Vortigern") and the hillfort at Little Doward. Ambrosius burns the castle down and Vortigern dies with it. Having killed Vortigern, Ambrosius next turns his attention to Hengist. Despite the fact that no earlier military actions of Ambrosius are recorded, the Saxons have already heard of his bravery and battle prowess. They immediately retreat beyond the Humber. Hengist soon amasses a massive army to face Ambrosius. His army counts 200,000 men and Ambrosius' only 10,000 men. He marches south and the first battle between the two armies takes place in Maisbeli, where Ambrosius emerges the victor. It is unclear what location Geoffrey had in mind. Maisbeli translates to "the field of Beli", and could be related to the Beli Mawr of Welsh legend and/or the Celtic god Belenus. Alternatively it could be a field where the Beltane festival was celebrated. Geoffrey could derive the name from a similar-sounding toponym. For example, Meicen of the Hen Ogledd ("Old North"), traditionally identified with Hatfield. Following his defeat, Hengist retreats towards Cunungeburg. Geoffrey probably had in mind Conisbrough, not far from Hatfield. Ambrosius leads his army against the new position of the Saxons. The second battle is more evenly fought, and Hengist has a chance to achieve victory. However, Ambrosius receives reinforcements from Brittany and the tide of the battle turns in favour of the Britons. Hengist himself is captured by his old enemy Eldol, Consul of Gloucester and decapitated. Soon after the battle, the surviving Saxon leaders Octa and Eosa submit themselves to Ambrosius' rule. He pardons them and grants them an area near Scotland. The area is not named, but Geoffrey could be basing this on Bernicia, a real Anglo-Saxon kingdom covering areas in the modern borders of Scotland and England. Geoffrey closely connects the deaths of Vortigern and Hengist, which are elsewhere poorly recorded. Vortigern historically died in the 450s, and various dates for the death of Hengist have been proposed, between the 450s and the 480s. Octa of Kent, the supposed son and heir of Hengist, was still alive in the 6th century and seems to belong to a later historical era than his father. The ruling family of the Kingdom of Kent were called the Oiscingas, a term identifying them as descendants of Oisc of Kent, not of Hengist. In effect, none of them was likely a literal son of Hengist and their relation to Hengist may have been a later invention. Geoffrey did not invent the connection, but his sources here were likely legendary in nature. Following his victories and the end of the wars, Ambrosius organises the burial of killed nobles at Kaercaradduc. Geoffrey identifies this otherwise unknown location with Caer-Caradog (Salisbury). Ambrosius wants a permanent memorial for the slain and assigns the task to Merlin. The result is the so-called Giants' Ring. Its location in the vicinity of Salisbury has led to its identification with Stonehenge, though Geoffrey never uses that term. Stonehenge is closer to Amesbury than Salisbury. The ring formation of the monument could equally apply to Avebury, the largest stone circle in Europe. In other texts In Welsh legend and texts, Ambrosius appears as Emrys Wledig (Emperor Ambrose). The term "Wledig" is a title used by senior royal and military commanders who have achieved notable success. The term is mostly used for famous figures such as Cunedda, though a few obscure figures have been given the title. For example, the Roman emperor Magnus Maximus is known as "Macsen Wledig" when he appears in Welsh folklore. In Robert de Boron's Merlin he is called simply Pendragon and his younger brother is named Uter, which he changes to Uterpendragon after the death of the elder sibling. This is probably a confusion that entered oral tradition from Wace's Roman de Brut. Wace usually only refers to li roi ("the king") without naming him, and someone has taken an early mention of Uther's epithet Pendragon as the name of his brother. Richard Carew's Survey of Cornwall (1602) drew on an earlier French writer, Nicholas Gille, who mentions Moigne, brother of Aurelius and Uther, who was duke of Cornwall, and "gouerner of the Realme" under Emperor Honorius. Possible identification with other figures Riothamus Léon Fleuriot has suggested Ambrosius is identical to Riothamus, a Brythonic leader who fought a major battle against the Goths in France around the year 470. Fleuriot argues that Ambrosius led the Britons in the battle, in which he was defeated and forced to retreat to Burgundy. Fleuriot proposed that he then returned to Britain to continue the war against the Saxons. Place-name evidence It has been suggested that the place-name Amesbury in Wiltshire might preserve the name of Ambrosius, and that perhaps Amesbury was the seat of his power base in the later fifth century. Scholars such as Shimon Applebaum have found a number of place names through the Midland dialect regions of Britain that incorporate the ambre- element; examples include Ombersley in Worcestershire, Ambrosden in Oxfordshire, Amberley in Herefordshire, Amberley in Gloucestershire, and Amberley in West Sussex. These scholars have claimed that this element represents an Old English word amor, the name of a woodland bird. However, Amesbury in Wiltshire is in a different dialect region and does not easily fit into the pattern of the Midland dialect place names. Modern fictional treatments The novel Coalescent by Stephen Baxter depicts Aurelianus as a general to Artorius, Briton and basis for the legend of King Arthur. In Baxter's novel, Aurelianus is a minor character who interacts with the book's main Roman-era protagonist, Regina, founder of a (literally) underground matriarchal society. In the text, he is credited with winning the battle of Mount Badon. In Marion Zimmer Bradley's The Mists of Avalon, Aurelianus is depicted as the ageing High King of Britain, a "too-ambitious" son of a Western Roman Emperor. His sister's son is Uther Pendragon, but Uther is described as not having any Roman blood. Aurelianus is unable to gather the leadership of the native Celts, who refuse to follow any but their own race. In Alfred Duggan's Conscience of the King, a historical novel about Cerdic, founder of the Anglo-Saxon kingdom of Wessex, Ambrosius Aurelianus is a Romano-British general who rose independently to military power, forming alliances with various British kings and setting out to drive the invading Saxons from Britain. Cerdic, who is of both Germanic and British descent and raised as a Roman citizen, served in his army as a young man. In the novel Ambrosius is a separate character from Arthur, or Artorius, who appears much later as a foe of Cerdic. In Stephen R. Lawhead's Pendragon Cycle, Aurelianus (most often referred to as "Aurelius") figures prominently, along with his brother Uther, in the second book of the series, Merlin. He is poisoned soon after becoming High King of Britain, and Uther succeeds him. Lawhead alters the standard Arthurian story somewhat, in that he has Aurelius marry Igraine and become the true father of King Arthur (Uther does marry his brother's widow, though). In Valerio Massimo Manfredi's The Last Legion, Aurelianus (here called "Aurelianus Ambrosius Ventidius") is a major character and is shown as one of the last loyal Romans, going to enormous lengths for his boy emperor Romulus Augustus, whose power has been wrested by the barbarian Odoacer. In this story, Romulus Augustus marries Igraine, and King Arthur is their son, and the sword of Julius Caesar becomes the legendary Excalibur in Britain. In the 2007 film version of the novel, he is played by Colin Firth and his name becomes "Aurelianus Caius Antonius". In both he is called "Aurelius" for short. Mary Stewart's The Crystal Cave follows Geoffrey of Monmouth in calling him Aurelius Ambrosius and portrays him as the father of Merlin, the elder brother of Uther (hence uncle of Arthur), an initiate of Mithras, and generally admired by everyone except the Saxons. Much of the book is set at his court in Brittany or during the campaign to retake his throne from Vortigern. Later books in the series show that Merlin's attitude toward Arthur is influenced by his belief that Arthur is a reincarnation of Ambrosius, who is seen through Merlin's eyes as a model of good kingship. In Rosemary Sutcliff's The Lantern Bearers Prince Ambrosius Aurelianus of Arfon fights the Saxons by training his British army with Roman techniques and making effective use of cavalry. By the end of the novel, the elite cavalry wing is led by his nephew, a dashing young warrior prince named Artos, whom Sutcliff postulates to be the real Arthur. In the sequel Sword at Sunset, Artos eventually succeeds an ailing Ambrosius as High King after he deliberately gets himself killed while hunting. In Parke Godwin's Firelord, Ambrosius is the elderly tribune of the diminished, dispirited and politically fractured Legio VI Victrix garrisoning Hadrian's Wall. Near his death, he names Artorius Pendragon (Arthur) as his successor, encourages him to convert the legion to alae (heavy cavalry) and allows the legionnaires to renounce their loyalty to Rome and take personal oaths of fealty to Artorius in order to help unify Brittania politically and to create a military force with the ability to quickly redeploy to meet differing threats. In Jack Whyte's Camulod Chronicles, Ambrosius Aurelianus is the half-brother of Caius Merlyn Britannicus (Merlin) and helps him lead the people of Camulod (Camelot). In Henry Treece's The Great Captains, Ambrosius is the aged and blind Count of Britain who is deposed by the Celt Artos the Bear after the latter takes his sword of command Caliburn and plunges it into a tree stump, daring him to pull it out. In Stargate SG-1, Ambrosius and Arthur are one and the same. Merlin was an Ancient, fleeing from Atlantis and later Ascends, then comes back in order to build the Sangraal, or Holy Grail, to defeat the Ori. Daniel Jackson also comments that it would mean that Ambrosius was 74 at the Battle of Mount Badon. Ambrosius (voiced by Owen Teale) is a major character in the 2020 Audible Original drama Albion: The Legend of Arthur, in which he is depicted as the uncle of Arthur and having a son named Cunan. References Sources 5th-century births 5th-century monarchs in Europe 5th-century Romans Arthurian characters Legendary British kings Date of death unknown Historical figures as candidates of King Arthur Last of the Romans Merlin Mythological kings Sub-Roman Britons Sub-Roman monarchs Welsh mythology

1748

https://en.wikipedia.org/wiki/Anaximenes%20of%20Miletus

Anaximenes of Miletus

Anaximenes of Miletus (; ; ) was an Ancient Greek, Pre-Socratic philosopher from Miletus in Anatolia (modern-day Turkey). He was the last of the three philosophers of the Milesian School, after Thales and Anaximander. These three are regarded by historians as the first philosophers of the Western world. Anaximenes is known for his belief that air is the arche, or the basic element of the universe from which all things are created. Little is known of Anaximenes' life and work, as all of his original texts are lost. Historians and philosophers have reconstructed information about Anaximenes by interpreting texts about him by later writers. All three Milesian philosophers were monists who believed in a single foundational source of everything: Anaximenes believed it to be air, while Thales and Anaximander believed it to be water and an undefined infinity, respectively. It is generally accepted that Anaximenes was instructed by Anaximander, and many of their philosophical ideas are similar. While Anaximenes was the preeminent Milesian philosopher in Ancient Greece, he is often given lower importance than the others in the modern day. Anaximenes held that air could change into other forms through either rarefaction or condensation. Condensation would make the air denser, turning it into wind, clouds, water, earth, and finally stone. Rarefaction would make the air less dense as it eventually becomes fire. Anaximenes also developed a model of the Earth, describing it as a flat disc floating atop the air while the Sun and stars are also flat and float alongside it. He described the Sun as revolving around the Earth, causing it to be obscured by higher lands during the night. As one of the Milesian philosophers, Anaximenes was one of the earliest figures to develop science. He influenced many of the Pre-Socratic philosophers that succeeded him, such as Heraclitus, Anaxagoras, Diogenes of Apollonia, and Xenophanes. He also provided early examples of concepts such as natural science, physical change, and scientific writing. Biography Anaximenes was born . Surviving information about the life of Anaximenes is limited, and it comes primarily from what was preserved by Ancient Greek philosophers, particularly Aristotle and Theophrastus. According to Theophrastus, Anaximenes was the son of Eurystratus, an associate of the philosopher Anaximander, and lived in Miletus. Anaximenes is recorded as becoming a student of Anaximander. Anaximenes was likely also taught Homeric epics, Greek mythology, and Orphism, which may have influenced his philosophy through their portrayal of the classical elements. It is considered likely that he and the other Milesian philosophers were wealthy, allowing them to dedicate time to philosophy. Anaximenes' apparent instructor, Anaximander, was a Milesian philosopher who proposed that apeiron, an undefined and boundless infinity, is the origin of all things. Anaximenes and Anaximander were two of the three Milesian philosophers, along with Thales. These were all philosophers from Miletus who were the first of the Ionian School. As the earliest known figures to have developed theories regarding the material origin of the world without a divine explanation, they are regarded as the first philosophers in the Western world. According to Diogenes Laertius, Anaximenes lived approximately from 585 to 524 BC. Anaximenes is only known to have written one full text, which may have been a response to Anaximander's text On Nature. It was described by Theophrastus as having a "simple and economical Ionic style". Anaximenes died . Philosophy Air as the arche What is known about Anaximenes' philosophy is what was preserved by later philosophers, particularly Aristotle and Theophrastus. According to their writings, each philosopher of the Milesian School was a material monist who sought to discover the arche (), or the one, underlying basis of all things. This is generally understood in the context of a substance, though scholars have argued that this may be anachronistic by imposing the Aristotelian notion of substance theory on earlier philosophy. Anaximenes argued that the arche is air. He described several basic elements that he considered to be manifestations of air, sorting them from least dense to most dense: fire, air, wind, clouds, water, earth, and stones. Philosophers have concluded that Anaximenes seems to have based his conclusions on naturally observable phenomena in the water cycle: the processes of rarefaction and condensation. He proposed that each substance is created by condensation to increase the density of air or by rarefaction to decrease it. The rarefaction process described by Anaximenes is often compared to felting. Temperature was of particular importance to Anaximenes' philosophy, and he developed an early concept of the connection between temperature and density. He believed that expanded air was thinner and therefore hotter while compressed air was thicker and therefore colder—although modern science has found the opposite to be true. He derived this belief from the fact that one's breath is warm when the mouth is wide while it is cold when the air is compressed through the lips. Anaximenes further applied his concept of air as the arche to other questions. He believed in the physis, or natural world, rather than the theo, or divine world. Anaximenes considered air to be divine in a sense, but he did not associate it with deities or personification. He presented air as the first cause that propelled living systems, giving no indication that air itself was caused by anything. Anaximenes also likened the soul to air, describing it as something that is driven by breath and wills humans to act as they do. These beliefs draw a connection between the soul and the physical world, as they suggest that they are made of the same material, air. From this, Anaximenes suggested that everything, whether it be an individual soul or the entire world, operates under the same principles in which things are held together and guided by the air. In Ancient Greek, the words for wind and for soul shared a common origin. Anaximenes' philosophy was centered on a theory of change through ongoing cycles, defined by the movement of air. These cycles consisted of opposite forces interacting with and superseding one another. This is most prominently indicated in the weather and the seasons, which alternate between hot and cold, dry and wet, or light and dark. Anaximenes did not believe that any substance could be created or destroyed, only that it could be changed from one form to another. From this belief, he proposed a model in which the qualitative traits of a substance are determined by quantitative factors. Cosmology and weather Anaximenes believed that the universe was initially made entirely of air and that liquids and solids were then produced from it through condensation. He also used air to explain the nature of the Earth and the surrounding celestial bodies. He believed in a flat Earth that emerged as one of the first things to be condensed from air. This Earth is supported by the pressure of air underneath it to keep it afloat. Anaximenes considered celestial objects to be those which had separated from the Earth. The philosophers who recorded Anaximenes' ideas disagree as to how he theorized this happened. He may have described them as evaporating or rarifying into fire. He is said to have compared the movement of the Earth, Sun, and stars to leaves floating in the wind, though he is also described as likening the stars to nails embedded in the sky. Some scholars have suggested that Anaximenes may have believed both models by distinguishing between planets and stars, which would make him the first person to do so. While the Sun is described as being a flame, Anaximenes thought it was not composed of rarefied air like the stars, but rather of Earth. According to Pseudo-Plutarch, Anaximenes thought that its burning comes not from its composition, but rather from its rapid motion. Anaximenes rejected the commonplace idea that the Sun went underneath the Earth, instead saying that it rotated around the Earth. Hippolytus likened it to a hat spinning around a person's head. It's unknown whether this analogy was of Hippolytus's own creation or if it was part of Anaximenes' explanation. This model of the sun's movement has been interpreted in various ways by subsequent philosophers. Anaximenes also described the causes of other natural phenomena. Like Anaximander, he believed that thunder and lightning occurred when wind emerged after being trapped in a cloud. Earthquakes, he asserted, were the result of alternating drying and wetting of the earth, causing it to undergo a cycle of splitting and swelling. He was the first philosopher to attempt a scientific explanation of rainbows, and the only one to do so until Aristotle. He described them as a reflection of sunlight off of clouds, and he theorized that the various colors were caused by an interaction of light and darkness. Milesian context Anaximenes' views have been interpreted as reconciling those of his two predecessors, Thales and Anaximander. Air as the arche is a limitless concept, which resembled Anaximander's theory that the arche was the abstract infinite that he called apeiron (, lit. 'unlimited, 'boundless'). At the same time, air as the arche was a defined substance, which resembled the theory of Thales that the arche was water. Anaximenes adopted a similar design of a flat Earth as Thales. Both proposed that the Earth was flat and that it rested on the substance they believed made up all things; Thales described a disc on water, while Anaximenes described a disc on air. His cosmology also did not diverge significantly from the ideas of Anaximander, only changing it so that it reflected his variety of monism. Anaximenes's philosophy was founded upon that of Anaximander, but tradition holds that he was also critical of his instructor in some areas. Anaximenes also maintained that there must be an empirical explanation for why substances change from one form to another. Anaximenes and Anaximander were similar in that they are not known to have justified why or how changes in physical things take place the way that they do. Anaximander instead invoked metaphors of justice and retribution to describe change, and he made direct appeals to deities and the divine in support of his beliefs. Anaximenes deviated from Anaximander in both of these ideas. Legacy and study Influence on science and philosophy Anaximenes was the last of the Milesian philosophers, as Miletus was destroyed by attacking Persian forces in 494 BC. Little of his life is known relative to the other Milesian philosophers, Thales and Anaximander. These three philosophers together began what eventually became science in the Western world. In ancient Greece, the ideas of Anaximenes were well regarded in philosophy, popularized by various philosophers such as Diogenes of Apollonia, and had a greater presence than the ideas of his predecessors. The other Milesian philosophers have since overshadowed him in the study of philosophy. Anaximenes was the first philosopher to give an explanation for substances changing from one state to another through a physical process. He may also have been the first philosopher to write in descriptive prose rather than verse, developing a prototype of scientific writing. Only fragments of Anaximenes' writings have been preserved directly, and it is unknown how much these fragments have diverged from the original texts as they were recorded by subsequent authors. Further details of Anaximenes' life and philosophical views are obscure, as none of his work has been preserved, and he is only known through fragments and interpretations of him made by later writers and polemicists. The Anaximenes crater on the Moon is named in his honor. Early medical practice developed ideas similar to Anaximenes, proposing that air was the basis of health in that it both provides life and carries disease. Anaximenes' conception of air has been likened to the atoms and subatomic particles that make up all substances through their quantitative organization. It has also been compared to the breath of life produced by God in the Old Testament. His understanding of physical properties as quantitative differences that applied at individual and universal scales became foundational ideas in the development of natural science. He was the first philosopher to analogize his philosophy in practical terms, comparing the functions of the world to behaviors that can be observed in common activities. In this manner, he was also the first to liken the function of the individual to that of the world. In this case, likening the breath that defines humans to the air that defines the world. His belief that the same properties governed the world at a human scale and a universal scale was eventually proven by Isaac Newton. Subsequent interpretation Some of Anaximenes' writings are referenced during the Hellenistic period, but no record of those documents currently exists. Philosophers such as Heraclitus, Anaxagoras, and Diogenes of Apollonia were all directly influenced by the work of Anaximenes. Diogenes of Apollonia adapted Anaximenes' ideas to the philosophy of Stoicism. The ideas ridiculed in the Aristophanes play The Clouds originated from the ideas of Anaximander and Anaximenes. Philosophers such as Xenophanes later adopted Anaximenes' model of cosmology. Xenophanes' theory that the arche is earth and water has also been interpreted as a response to Anaximenes. Plato referenced the concept of air as the cause of thought in the Phaedo, rejecting it with the argument that one's physical state does not determine their fate. In the Timaeus, Plato favorably mentions Anaximenes' theory of matter and its seven states from stone to fire. Aristotle was critical of the ideas of Anaximenes. In his Metaphysics, Aristotle characterized Anaximenes and his predecessors as monists, those who believe that all things are composed of a single substance. This description came to be widely accepted in philosophy. Practitioners of Aristotelian philosophy further considered Anaximenes to be a founder of naturalism. After Aristotle, Theophrastus continued the doxography of the Milesian philosophers and other Ionians. He described Anaximenes as a natural philosopher. Other ancient philosophers who analyzed the work of Anaximenes include Simplicius, Aetius, Hippolytus, and Plutarch. Georg Wilhelm Friedrich Hegel said that Anaximenes was the first philosopher to transfer the ideas of natural philosophy into the philosophy of consciousness. Werner Heisenberg said that the philosophy of Anaximenes caused a setback in scientific understanding, as it moved analysis away from physical properties themselves. Karl Popper suggested that Anaximenes and Anaximander developed a philosophy of rationalist critique, allowing criticism of one's teacher, that was not revived until the Renaissance. References Citations Sources Further reading External links Anaximenes at the Internet Encyclopedia of Philosophy Anaximenes of Miletus Life and Work – Fragments and Testimonies by Giannis Stamatellos 6th-century BC Greek philosophers Ancient Milesians Philosophers of ancient Ionia Presocratic philosophers

1770

https://en.wikipedia.org/wiki/Apollo%2013

Apollo 13

Apollo 13 (April 1117, 1970) was the seventh crewed mission in the Apollo space program and the third meant to land on the Moon. The craft was launched from Kennedy Space Center on April 11, 1970, but the lunar landing was aborted after an oxygen tank in the service module (SM) failed two days into the mission. The crew instead looped around the Moon in a circumlunar trajectory and returned safely to Earth on April 17. The mission was commanded by Jim Lovell, with Jack Swigert as command module (CM) pilot and Fred Haise as Lunar Module (LM) pilot. Swigert was a late replacement for Ken Mattingly, who was grounded after exposure to rubella (measles). A routine stir of an oxygen tank ignited damaged wire insulation inside it, causing an explosion that vented the contents of both of the SM's oxygen tanks to space. Without oxygen, needed for breathing and for generating electric power, the SM's propulsion and life support systems could not operate. The CM's systems had to be shut down to conserve its remaining resources for reentry, forcing the crew to transfer to the LM as a lifeboat. With the lunar landing canceled, mission controllers worked to bring the crew home alive. Although the LM was designed to support two men on the lunar surface for two days, Mission Control in Houston improvised new procedures so it could support three men for four days. The crew experienced great hardship, caused by limited power, a chilly and wet cabin and a shortage of potable water. There was a critical need to adapt the CM's cartridges for the carbon dioxide scrubber system to work in the LM; the crew and mission controllers were successful in improvising a solution. The astronauts' peril briefly renewed public interest in the Apollo program; tens of millions watched the splashdown in the South Pacific Ocean on television. An investigative review board found fault with preflight testing of the oxygen tank and Teflon being placed inside it. The board recommended changes, including minimizing the use of potentially combustible items inside the tank; this was done for Apollo 14. The story of Apollo 13 has been dramatized several times, most notably in the 1995 film Apollo 13 based on Lost Moon, the 1994 memoir co-authored by Lovell – and an episode of the 1998 miniseries From the Earth to the Moon. Background In 1961, U.S. President John F. Kennedy challenged his nation to land an astronaut on the Moon by the end of the decade, with a safe return to Earth. NASA worked towards this goal incrementally, sending astronauts into space during Project Mercury and Project Gemini, leading up to the Apollo program. The goal was achieved with Apollo 11, which landed on the Moon on July 20, 1969. Neil Armstrong and Buzz Aldrin walked on the lunar surface while Michael Collins orbited the Moon in Command Module Columbia. The mission returned to Earth on July 24, 1969, fulfilling Kennedy's challenge. NASA had contracted for fifteen Saturn V rockets to achieve the goal; at the time no one knew how many missions this would require. Since success was obtained in 1969 with the sixth SaturnV on Apollo 11, nine rockets remained available for a hoped-for total of ten landings. After the excitement of Apollo 11, the general public grew apathetic towards the space program and Congress continued to cut NASA's budget; Apollo 20 was canceled. Despite the successful lunar landing, the missions were considered so risky that astronauts could not afford life insurance to provide for their families if they died in space. Even before the first U.S. astronaut entered space in 1961, planning for a centralized facility to communicate with the spacecraft and monitor its performance had begun, for the most part the brainchild of Christopher C. Kraft Jr., who became NASA's first flight director. During John Glenn's Mercury Friendship 7 flight in February 1962 (the first crewed orbital flight by the U.S.), one of Kraft's decisions was overruled by NASA managers. He was vindicated by post-mission analysis and implemented a rule that, during the mission, the flight director's word was absolute – to overrule him, NASA would have to fire him on the spot. Flight directors during Apollo had a one-sentence job description, "The flight director may take any actions necessary for crew safety and mission success." In 1965, Houston's Mission Control Center opened, in part designed by Kraft and now named for him. In Mission Control, each flight controller, in addition to monitoring telemetry from the spacecraft, was in communication via voice loop to specialists in a Staff Support Room (or "back room"), who focused on specific spacecraft systems. Apollo 13 was to be the second H mission, meant to demonstrate precision lunar landings and explore specific sites on the Moon. With Kennedy's goal accomplished by Apollo 11, and Apollo 12 demonstrating that the astronauts could perform a precision landing, mission planners were able to focus on more than just landing safely and having astronauts minimally trained in geology gather lunar samples to take home to Earth. There was a greater role for science on Apollo 13, especially for geology, something emphasized by the mission's motto, Ex luna, scientia (From the Moon, knowledge). Astronauts and key Mission Control personnel Apollo 13's mission commander, Jim Lovell, was 42 years old at the time of the spaceflight. He was a graduate of the United States Naval Academy and had been a naval aviator and test pilot before being selected for the second group of astronauts in 1962; he flew with Frank Borman in Gemini 7 in 1965 and Buzz Aldrin in Gemini 12 the following year before flying in Apollo 8 in 1968, the first spacecraft to orbit the Moon. At the time of Apollo 13, Lovell was the NASA astronaut with the most time in space, with 572 hours over the three missions. Jack Swigert, the command module pilot (CMP), was 38 years old and held a B.S. in mechanical engineering and an M.S. in aerospace science; he had served in the Air Force and in state Air National Guards and was an engineering test pilot before being selected for the fifth group of astronauts in 1966. Fred Haise, the lunar module pilot (LMP), was 35 years old. He held a B.S. in aeronautical engineering, had been a Marine Corps fighter pilot, and was a civilian research pilot for NASA when he was selected as a Group5 astronaut. According to the standard Apollo crew rotation, the prime crew for Apollo 13 would have been the backup crew for Apollo 10, with Mercury and Gemini veteran Gordon Cooper in command, Donn F. Eisele as CMP and Edgar Mitchell as LMP. Deke Slayton, NASA's Director of Flight Crew Operations, never intended to rotate Cooper and Eisele to a prime crew assignment, as both were out of favorCooper for his lax attitude towards training, and Eisele for incidents aboard Apollo7 and an extramarital affair. He assigned them to the backup crew because no other veteran astronauts were available. Slayton's original choices for Apollo 13 were Alan Shepard as commander, Stuart Roosa as CMP, and Mitchell as LMP. However, management felt Shepard needed more training time, as he had only recently resumed active status after surgery for an inner ear disorder and had not flown since 1961. Thus, Lovell's crew (himself, Haise and Ken Mattingly), having all backed up Apollo 11 and being slated for Apollo 14, was swapped with Shepard's. Swigert was originally CMP of Apollo 13's backup crew, with John Young as commander and Charles Duke as lunar module pilot. Seven days before launch, Duke contracted rubella from a friend of his son. This exposed both the prime and backup crews, who trained together. Of the five, only Mattingly was not immune through prior exposure. Normally, if any member of the prime crew had to be grounded, the remaining crew would be replaced as well, and the backup crew substituted, but Duke's illness ruled this out, so two days before launch, Mattingly was replaced by Swigert. Mattingly never developed rubella and later flew on Apollo 16. For Apollo, a third crew of astronauts, known as the support crew, was designated in addition to the prime and backup crews used on projects Mercury and Gemini. Slayton created the support crews because James McDivitt, who would command Apollo 9, believed that, with preparation going on in facilities across the US, meetings that needed a member of the flight crew would be missed. Support crew members were to assist as directed by the mission commander. Usually low in seniority, they assembled the mission's rules, flight plan, and checklists, and kept them updated; for Apollo 13, they were Vance D. Brand, Jack Lousma and either William Pogue or Joseph Kerwin. For Apollo 13, flight directors were Gene Kranz, White team (the lead flight director); Glynn Lunney, Black team; Milton Windler, Maroon team and Gerry Griffin, Gold team. The CAPCOMs (the person in Mission Control, during the Apollo program an astronaut, who was responsible for voice communications with the crew) for Apollo 13 were Kerwin, Brand, Lousma, Young and Mattingly. Mission insignia and call signs The Apollo 13 mission insignia depicts the Greek god of the Sun, Apollo, with three horses pulling his chariot across the face of the Moon, and the Earth seen in the distance. This is meant to symbolize the Apollo flights bringing the light of knowledge to all people. The mission motto, Ex luna, scientia ("From the Moon, knowledge"), appears. In choosing it, Lovell adapted the motto of his alma mater, the Naval Academy, Ex scientia, tridens ("From knowledge, sea power"). On the patch, the mission number appeared in Roman numerals as Apollo XIII. It did not have to be modified after Swigert replaced Mattingly, as it is one of only two Apollo mission insigniathe other being Apollo 11not to include the names of the crew. It was designed by artist Lumen Martin Winter, who based it on a mural he had painted for the St. Regis Hotel in New York City. The mural was later purchased by actor Tom Hanks, who portrayed Lovell in the movie Apollo 13, and is now in the Captain James A. Lovell Federal Health Care Center in Illinois. The mission's motto was in Lovell's mind when he chose the call sign Aquarius for the lunar module, taken from Aquarius, the bringer of water. Some in the media erroneously reported that the call sign was taken from a song by that name from the musical Hair. The command module's call sign, Odyssey, was chosen not only for its Homeric association but to refer to the recent movie, 2001: A Space Odyssey, based on a short story by science fiction author Arthur C. Clarke. In his book, Lovell indicated he chose the name Odyssey because he liked the word and its definition: a long voyage with many changes of fortune. Space vehicle The Saturn V rocket used to carry Apollo 13 to the Moon was numbered SA-508, and was almost identical to those used on Apollo8 through 12. Including the spacecraft, the rocket weighed in at . The S-IC first stage's engines were rated to generate less total thrust than Apollo 12's, though they remained within specifications. To keep its liquid hydrogen propellent cold, the S-II second stage's cryogenic tanks were insulated; on earlier Apollo missions this came in the form of panels that were affixed, but beginning with Apollo 13, insulation was sprayed onto the exterior of the tanks. Extra propellant was carried as a test, since future J missions to the Moon would require more propellant for their heavier payloads. This made the vehicle the heaviest yet flown by NASA, and Apollo 13 was visibly slower to clear the launch tower than earlier missions. The Apollo 13 spacecraft consisted of Command Module 109 and Service Module 109 (together CSM-109), called Odyssey, and Lunar Module7 (LM-7), called Aquarius. Also considered part of the spacecraft was the launch escape system, which would propel the command module (CM) to safety in the event of a problem during liftoff, and the Spacecraft–LM Adapter, numbered as SLA-16, which housed the lunar module (LM) during the first hours of the mission. The LM stages, CM and service module (SM) were received at Kennedy Space Center (KSC) in June 1969; the portions of the Saturn V were received in June and July. Thereafter, testing and assembly proceeded, culminating with the rollout of the launch vehicle, with the spacecraft atop it, on December 15, 1969. Apollo 13 was originally scheduled for launch on March 12, 1970; in January of that year, NASA announced the mission would be postponed until April 11, both to allow more time for planning and to spread the Apollo missions over a longer period of time. The plan was to have two Apollo flights per year and was in response to budgetary constraints that had recently seen the cancellation of Apollo 20. Training and preparation The Apollo 13 prime crew undertook over 1,000 hours of mission-specific training, more than five hours for every hour of the mission's ten-day planned duration. Each member of the prime crew spent over 400 hours in simulators of the CM and (for Lovell and Haise) of the LM at KSC and at Houston, some of which involved the flight controllers at Mission Control. Flight controllers participated in many simulations of problems with the spacecraft in flight, which taught them how to react in an emergency. Specialized simulators at other locations were also used by the crew members. The astronauts of Apollo 11 had minimal time for geology training, with only six months between crew assignment and launch; higher priorities took much of their time. Apollo 12 saw more such training, including practice in the field, using a CAPCOM and a simulated backroom of scientists, to whom the astronauts had to describe what they saw. Scientist-astronaut Harrison Schmitt saw that there was limited enthusiasm for geology field trips. Believing an inspirational teacher was needed, Schmitt arranged for Lovell and Haise to meet his old professor, Caltech's Lee Silver. The two astronauts, and backups Young and Duke, went on a field trip with Silver at their own time and expense. At the end of their week together, Lovell made Silver their geology mentor, who would be extensively involved in the geology planning for Apollo 13. Farouk El-Baz oversaw the training of Mattingly and his backup, Swigert, which involved describing and photographing simulated lunar landmarks from airplanes. El-Baz had all three prime crew astronauts describe geologic features they saw during their flights between Houston and KSC; Mattingly's enthusiasm caused other astronauts, such as Apollo 14's CMP, Roosa, to seek out El-Baz as a teacher. Concerned about how close Apollo 11's LM, Eagle, had come to running out of propellant during its lunar descent, mission planners decided that beginning with Apollo 13, the CSM would bring the LM to the low orbit from which the landing attempt would commence. This was a change from Apollo 11 and 12, on which the LM made the burn to bring it to the lower orbit. The change was part of an effort to increase the amount of hover time available to the astronauts as the missions headed into rougher terrain. The plan was to devote the first of the two four-hour lunar surface extravehicular activities (EVAs) to setting up the Apollo Lunar Surface Experiments Package (ALSEP) group of scientific instruments; during the second, Lovell and Haise would investigate Cone crater, near the planned landing site. The two astronauts wore their spacesuits for some 20 walk-throughs of EVA procedures, including sample gathering and use of tools and other equipment. They flew in the "Vomit Comet" in simulated microgravity or lunar gravity, including practice in donning and doffing spacesuits. To prepare for the descent to the Moon's surface, Lovell flew the Lunar Landing Training Vehicle (LLTV) after receiving helicopter training. Despite the crashes of one LLTV and one similar Lunar Landing Research Vehicle (LLRV) prior to Apollo 13, mission commanders considered flying them invaluable experience and so prevailed on reluctant NASA management to retain them. Experiments and scientific objectives Apollo 13's designated landing site was near Fra Mauro crater; the Fra Mauro formation was believed to contain much material spattered by the impact that had filled the Imbrium basin early in the Moon's history. Dating it would provide information not only about the Moon, but about the Earth's early history. Such material was likely to be available at Cone crater, a site where an impact was believed to have drilled deep into the lunar regolith. Apollo 11 had left a seismometer on the Moon, but the solar-powered unit did not survive its first two-week-long lunar night. The Apollo 12 astronauts also left one as part of its ALSEP, which was nuclear-powered. Apollo 13 also carried a seismometer (known as the Passive Seismic Experiment, or PSE), similar to Apollo 12's, as part of its ALSEP, to be left on the Moon by the astronauts. That seismometer was to be calibrated by the impact, after jettison, of the ascent stage of Apollo 13's LM, an object of known mass and velocity impacting at a known location. Other ALSEP experiments on Apollo 13 included a Heat Flow Experiment (HFE), which would involve drilling two holes deep. This was Haise's responsibility; he was also to drill a third hole of that depth for a core sample. A Charged Particle Lunar Environment Experiment (CPLEE) measured the protons and electrons of solar origin reaching the Moon. The package also included a Lunar Atmosphere Detector (LAD) and a Dust Detector, to measure the accumulation of debris. The Heat Flow Experiment and the CPLEE were flown for the first time on Apollo 13; the other experiments had been flown before. To power the ALSEP, the SNAP-27 radioisotope thermoelectric generator (RTG) was flown. Developed by the U.S. Atomic Energy Commission, SNAP-27 was first flown on Apollo 12. The fuel capsule contained about of plutonium oxide. The cask placed around the capsule for transport to the Moon was built with heat shields of graphite and of beryllium, and with structural parts of titanium and of Inconel materials. Thus, it was built to withstand the heat of reentry into the Earth's atmosphere rather than pollute the air with plutonium in the event of an aborted mission. A United States flag was also taken, to be erected on the Moon's surface. For Apollo 11 and 12, the flag had been placed in a heat-resistant tube on the front landing leg; it was moved for Apollo 13 to the Modularized Equipment Stowage Assembly (MESA) in the LM descent stage. The structure to fly the flag on the airless Moon was improved from Apollo 12's. For the first time, red stripes were placed on the helmet, arms and legs of the commander's A7L spacesuit. This was done as, after Apollo 11, those reviewing the images taken had trouble distinguishing Armstrong from Aldrin, but the change was approved too late for Apollo 12. New drink bags that attached inside the helmets and were to be sipped from as the astronauts walked on the Moon were demonstrated by Haise during Apollo 13's final television broadcast before the accident. Apollo 13's primary mission objectives were to: "Perform selenological inspection, survey, and sampling of materials in a preselected region of the Fra Mauro Formation. Deploy and activate an Apollo Lunar Surface Experiments Package. Develop man's capability to work in the lunar environment. Obtain photographs of candidate exploration sites." The astronauts were also to accomplish other photographic objectives, including of the Gegenschein from lunar orbit, and of the Moon itself on the journey back to Earth. Some of this photography was to be performed by Swigert as Lovell and Haise walked on the Moon. Swigert was also to take photographs of the Lagrangian points of the Earth-Moon system. Apollo 13 had twelve cameras on board, including those for television and moving pictures. The crew was also to downlink bistatic radar observations of the Moon. None of these was attempted because of the accident. Flight of Apollo 13 Launch and translunar injection The mission was launched at the planned time, 2:13:00 pm EST (19:13:00 UTC) on April 11. An anomaly occurred when the second-stage, center (inboard) engine shut down about two minutes early. This was caused by severe pogo oscillations. Starting with Apollo 10, the vehicle's guidance system was designed to shut the engine down in response to chamber pressure excursions. Pogo oscillations had occurred on Titan rockets (used during the Gemini program) and on previous Apollo missions, but on Apollo 13 they were amplified by an interaction with turbopump cavitation. A fix to prevent pogo was ready for the mission, but schedule pressure did not permit the hardware's integration into the Apollo 13 vehicle. A post-flight investigation revealed the engine was one cycle away from catastrophic failure. The four outboard engines and the S-IVB third stage burned longer to compensate, and the vehicle achieved very close to the planned circular parking orbit, followed by a translunar injection (TLI) about two hours later, setting the mission on course for the Moon. After TLI, Swigert performed the separation and transposition maneuvers before docking the CSM Odyssey to the LM Aquarius, and the spacecraft pulled away from the third stage. Ground controllers then sent the third stage on a course to impact the Moon in range of the Apollo 12 seismometer, which it did just over three days into the mission. The crew settled in for the three-day trip to Fra Mauro. At 30:40:50 into the mission, with the TV camera running, the crew performed a burn to place Apollo 13 on a hybrid trajectory. The departure from a free-return trajectory meant that if no further burns were performed, Apollo 13 would miss Earth on its return trajectory, rather than intercept it, as with a free return. A free return trajectory could only reach sites near the lunar equator; a hybrid trajectory, which could be started at any point after TLI, allowed sites with higher latitudes, such as Fra Mauro, to be reached. Communications were enlivened when Swigert realized that in the last-minute rush, he had omitted to file his federal income tax return (due April 15), and amid laughter from mission controllers, asked how he could get an extension. He was found to be entitled to a 60-day extension for being out of the country at the deadline. Entry into the LM to test its systems had been scheduled for 58:00:00; when the crew awoke on the third day of the mission, they were informed it had been moved up three hours and was later moved up again by another hour. A television broadcast was scheduled for 55:00:00; Lovell, acting as emcee, showed the audience the interiors of Odyssey and Aquarius. The audience was limited since none of the television networks were carrying the broadcast, forcing Marilyn Lovell (Jim Lovell's wife) to go to the VIP room at Mission Control if she wanted to watch her husband and his crewmates. Accident Approximately six and a half minutes after the TV broadcastapproaching 56:00:00Apollo 13 was about from Earth. Haise was completing the shutdown of the LM after testing its systems while Lovell stowed the TV camera. Jack Lousma, the CAPCOM, sent minor instructions to Swigert, including changing the attitude of the craft to facilitate photography of Comet Bennett. The pressure sensor in one of the SM's oxygen tanks had earlier appeared to be malfunctioning, so Sy Liebergot (the EECOM, in charge of monitoring the CSM's electrical system) requested that the stirring fans in the tanks be activated. Normally this was done once daily; a stir would destratify the contents of the tanks, making the pressure readings more accurate. The Flight Director, Kranz, had Liebergot wait a few minutes for the crew to settle down after the telecast, then Lousma relayed the request to Swigert, who activated the switches controlling the fans, and after a few seconds turned them off again. Ninety-five seconds after Swigert activated those switches, the astronauts heard a "pretty large bang", accompanied by fluctuations in electrical power and the firing of the attitude control thrusters. Communications and telemetry to Earth were lost for 1.8 seconds, until the system automatically corrected by switching the high-gain S-band antenna, used for translunar communications, from narrow-beam to wide-beam mode. The accident happened at 55:54:53 (03:08 UTC on April 14, 10:08 PM EST, April 13). Swigert reported 26 seconds later, "Okay, Houston, we've had a problem here," echoed at 55:55:42 by Lovell, "Houston, we've had a problem. We've had a Main B Bus undervolt." William Fenner was the guidance officer (GUIDO) who was the first to report a problem in the control room to Kranz. Lovell's initial thought on hearing the noise was that Haise had activated the LM's cabin-repressurization valve, which also produced a bang (Haise enjoyed doing so to startle his crewmates), but Lovell could see that Haise had no idea what had happened. Swigert initially thought that a meteoroid might have struck the LM, but he and Lovell quickly realized there was no leak. The "Main Bus B undervolt" meant that there was insufficient voltage produced by the SM's three fuel cells (fueled by hydrogen and oxygen piped from their respective tanks) to the second of the SM's two electric power distribution systems. Almost everything in the CSM required power. Although the bus momentarily returned to normal status, soon both buses A and B were short on voltage. Haise checked the status of the fuel cells and found that two of them were dead. Mission rules forbade entering lunar orbit unless all fuel cells were operational. In the minutes after the accident, there were several unusual readings, showing that tank2 was empty and tank1's pressure slowly falling, that the computer on the spacecraft had reset and that the high-gain antenna was not working. Liebergot initially missed the worrying signs from tank2 following the stir, as he was focusing on tank1, believing that its reading would be a good guide to what was present in tank2, as did controllers supporting him in the "back room". When Kranz questioned Liebergot on this, he initially responded that there might be false readings due to an instrumentation problem; he was often teased about that in the years to come. Lovell, looking out the window, reported "a gas of some sort" venting into space, making it clear that there was a serious problem. Since the fuel cells needed oxygen to operate, when Oxygen Tank1 ran dry, the remaining fuel cell would shut down, meaning the CSM's only significant sources of power and oxygen would be the CM's batteries and its oxygen "surge tank". These would be needed for the final hours of the mission, but the remaining fuel cell, already starved for oxygen, was drawing from the surge tank. Kranz ordered the surge tank isolated, saving its oxygen, but this meant that the remaining fuel cell would die within two hours, as the oxygen in tank1 was consumed or leaked away. The volume surrounding the spacecraft was filled with myriad small bits of debris from the accident, complicating any efforts to use the stars for navigation. The mission's goal became simply getting the astronauts back to Earth alive. Looping around the Moon The lunar module had charged batteries and full oxygen tanks for use on the lunar surface, so Kranz directed that the astronauts power up the LM and use it as a "lifeboat"a scenario anticipated but considered unlikely. Procedures for using the LM in this way had been developed by LM flight controllers after a training simulation for Apollo 10 in which the LM was needed for survival, but could not be powered up in time. Had Apollo 13's accident occurred on the return voyage, with the LM already jettisoned, the astronauts would have died, as they would have following an explosion in lunar orbit, including one while Lovell and Haise walked on the Moon. A key decision was the choice of return path. A "direct abort" would use the SM's main engine (the Service Propulsion System or SPS) to return before reaching the Moon. However, the accident could have damaged the SPS, and the fuel cells would have to last at least another hour to meet its power requirements, so Kranz instead decided on a longer route: the spacecraft would swing around the Moon before heading back to Earth. Apollo 13 was on the hybrid trajectory which was to take it to Fra Mauro; it now needed to be brought back to a free return. The LM's Descent Propulsion System (DPS), although not as powerful as the SPS, could do this, but new software for Mission Control's computers needed to be written by technicians as it had never been contemplated that the CSM/LM spacecraft would have to be maneuvered from the LM. As the CM was being shut down, Lovell copied down its guidance system's orientation information and performed hand calculations to transfer it to the LM's guidance system, which had been turned off; at his request Mission Control checked his figures. At 61:29:43.49 the DPS burn of 34.23 seconds took Apollo 13 back to a free return trajectory. The change would get Apollo 13 back to Earth in about four days' timethough with splashdown in the Indian Ocean, where NASA had few recovery forces. Jerry Bostick and other Flight Dynamics Officers (FIDOs) were anxious both to shorten the travel time and to move splashdown to the Pacific Ocean, where the main recovery forces were located. One option would shave 36 hours off the return time, but required jettisoning the SM; this would expose the CM's heat shield to space during the return journey, something for which it had not been designed. The FIDOs also proposed other solutions. After a meeting involving NASA officials and engineers, the senior individual present, Manned Spaceflight Center director Robert R. Gilruth, decided on a burn using the DPS, that would save 12 hours and land Apollo 13 in the Pacific. This "PC+2" burn would take place two hours after pericynthion, the closest approach to the Moon. At pericynthion, Apollo 13 set the record (per the Guinness Book of World Records), which still stands, for the highest absolute altitude attained by a crewed spacecraft: from Earth at 7:21 pm EST, April 14 (00:21:00 UTC April 15). While preparing for the burn the crew was told that the S-IVB had impacted the Moon as planned, leading Lovell to quip, "Well, at least something worked on this flight." Kranz's White team of mission controllers, who had spent most of their time supporting other teams and developing the procedures urgently needed to get the astronauts home, took their consoles for the PC+2 procedure. Normally, the accuracy of such a burn could be assured by checking the alignment Lovell had transferred to the LM's computer against the position of one of the stars astronauts used for navigation, but the light glinting off the many pieces of debris accompanying the spacecraft made that impractical. The astronauts accordingly used the one star available whose position could not be obscuredthe Sun. Houston also informed them that the Moon would be centered in the commander's window of the LM as they made the burn, which was almost perfectless than 0.3 meters (1 foot) per second off. The burn, at 79:27:38.95, lasted four minutes and 23 seconds. The crew then shut down most LM systems to conserve consumables. Return to Earth The LM carried enough oxygen, but that still left the problem of removing carbon dioxide, which was absorbed by canisters of lithium hydroxide pellets. The LM's stock of canisters, meant to accommodate two astronauts for 45 hours on the Moon, was not enough to support three astronauts for the return journey to Earth. The CM had enough canisters, but they were of a different shape and size to the LM's, hence unable to be used in the LM's equipment. Engineers on the ground devised a way to bridge the gap, using plastic, covers ripped from procedure manuals, duct tape, and other items available on the spacecraft. NASA engineers referred to the improvised device as "the mailbox". The procedure for building the device was read to the crew by CAPCOM Joseph Kerwin over the course of an hour, and was built by Swigert and Haise; carbon dioxide levels began dropping immediately. Lovell later described this improvisation as "a fine example of cooperation between ground and space". The CSM's electricity came from fuel cells that produced water as a byproduct, but the LM was powered by silver-zinc batteries which did not, so both electrical power and water (needed for equipment cooling as well as drinking) would be critical. LM power consumption was reduced to the lowest level possible; Swigert was able to fill some drinking bags with water from the CM's water tap, but even assuming rationing of personal consumption, Haise initially calculated they would run out of water for cooling about five hours before reentry. This seemed acceptable because the systems of Apollo 11's LM, once jettisoned in lunar orbit, had continued to operate for seven to eight hours even with the water cut off. In the end, Apollo 13 returned to Earth with of water remaining. The crew's ration was 0.2 liters (6.8 fl oz) of water per person per day; the three astronauts lost a total of among them, and Haise developed a urinary tract infection. This infection was probably caused by the reduced water intake, but microgravity and effects of cosmic radiation might have impaired his immune system's reaction to the pathogen. Inside the darkened spacecraft, the temperature dropped as low as . Lovell considered having the crew don their spacesuits, but decided this would be too hot. Instead, Lovell and Haise wore their lunar EVA boots and Swigert put on an extra coverall. All three astronauts were cold, especially Swigert, who had got his feet wet while filling the water bags and had no lunar overshoes (since he had not been scheduled to walk on the Moon). As they had been told not to discharge their urine to space to avoid disturbing the trajectory, they had to store it in bags. Water condensed on the walls, though any condensation that may have been behind equipment panels caused no problems, partly because of the extensive electrical insulation improvements instituted after the Apollo 1 fire. Despite all this, the crew voiced few complaints. Flight controller John Aaron, along with Mattingly and several engineers and designers, devised a procedure for powering up the command module from full shutdownsomething never intended to be done in flight, much less under Apollo 13's severe power and time constraints. The astronauts implemented the procedure without apparent difficulty: Kranz later credited all three astronauts having been test pilots, accustomed to having to work in critical situations with their lives on the line, for their survival. Recognizing that the cold conditions combined with insufficient rest would hinder the time critical startup of the command module prior to reentry, at 133 hours into flight Mission Control gave Lovell the okay to fully power up the LM to raise the cabin temperature, which included restarting the LM's guidance computer. Having the LM's computer running enabled Lovell to perform a navigational sighting and calibrate the LM's Inertial Measurement Unit (IMU). With the lunar module's computer aware of its location and orientation, the command module's computer was later calibrated in a reverse of the normal procedures used to set up the LM, shaving steps from the restart process and increasing the accuracy of the PGNCS-controlled reentry. Reentry and splashdown Despite the accuracy of the transearth injection, the spacecraft slowly drifted off course, necessitating a correction. As the LM's guidance system had been shut down following the PC+2 burn, the crew was told to use the line between night and day on the Earth to guide them, a technique used on NASA's Earth-orbit missions but never on the way back from the Moon. This DPS burn, at 105:18:42 for 14 seconds, brought the projected entry flight path angle back within safe limits. Nevertheless, yet another burn was needed at 137:40:13, using the LM's reaction control system (RCS) thrusters, for 21.5 seconds. The SM was jettisoned less than half an hour later, allowing the crew to see the damage for the first time, and photograph it. They reported that an entire panel was missing from the SM's exterior, the fuel cells above the oxygen tank shelf were tilted, that the high-gain antenna was damaged, and there was a considerable amount of debris elsewhere. Haise could see possible damage to the SM's engine bell, validating Kranz's decision not to use the SPS. The last problem to be solved was how to separate the lunar module a safe distance away from the command module just before reentry. The normal procedure, in lunar orbit, was to release the LM and then use the service module's RCS to pull the CSM away, but by this point, the SM had already been released. Grumman, manufacturer of the LM, assigned a team of University of Toronto engineers, led by senior scientist Bernard Etkin, to solve the problem of how much air pressure to use to push the modules apart. The astronauts applied the solution, which was successful. The LM reentered Earth's atmosphere and was destroyed, the remaining pieces falling in the deep ocean. Apollo 13's final midcourse correction had addressed the concerns of the Atomic Energy Commission, which wanted the cask containing the plutonium oxide intended for the SNAP-27 RTG to land in a safe place. The impact point was over the Tonga Trench in the Pacific, one of its deepest points, and the cask sank to the bottom. Later helicopter surveys found no radioactive leakage. Ionization of the air around the command module during reentry would typically cause a four-minute communications blackout. Apollo 13's shallow reentry path lengthened this to six minutes, longer than had been expected; controllers feared that the CM's heat shield had failed. Odyssey regained radio contact and splashed down safely in the South Pacific Ocean, , southeast of American Samoa and from the recovery ship, USS Iwo Jima. Although fatigued, the crew was in good condition except for Haise, who had developed a serious urinary tract infection because of insufficient water intake. The crew stayed overnight on the ship and flew to Pago Pago, American Samoa, the next day. They flew to Hawaii, where President Richard Nixon awarded them the Presidential Medal of Freedom, the highest civilian honor. They stayed overnight, and then were flown back to Houston. En route to Honolulu, President Nixon stopped at Houston to award the Presidential Medal of Freedom to the Apollo 13 Mission Operations Team. He originally planned to give the award to NASA administrator Thomas O. Paine, but Paine recommended the mission operations team. Public and media reaction Worldwide interest in the Apollo program was reawakened by the incident; television coverage was seen by millions. Four Soviet ships headed toward the landing area to assist if needed, and other nations offered assistance should the craft have to splash down elsewhere. President Nixon canceled appointments, phoned the astronauts' families, and drove to NASA's Goddard Space Flight Center in Greenbelt, Maryland, where Apollo's tracking and communications were coordinated. The rescue received more public attention than any spaceflight to that point, other than the first Moon landing on Apollo 11. There were worldwide headlines, and people surrounded television sets to get the latest developments, offered by networks who interrupted their regular programming for bulletins. Pope Paul VI led a congregation of 10,000 people in praying for the astronauts' safe return; ten times that number offered prayers at a religious festival in India. The United States Senate on April 14 passed a resolution urging businesses to pause at 9:00pm local time that evening to allow for employee prayer. An estimated 40million Americans watched Apollo13's splashdown, carried live on all three networks, with another 30million watching some portion of the six and one-half hour telecast. Even more outside the U.S. watched. Jack Gould of The New York Times stated that Apollo13, "which came so close to tragic disaster, in all probability united the world in mutual concern more fully than another successful landing on the Moon would have". Investigation and response Review board Immediately upon the crew's return, NASA Administrator Paine and Deputy Administrator George Low appointed a review boardchaired by NASA Langley Research Center Director Edgar M. Cortright and including Neil Armstrong and six othersto investigate the accident. The board's final report, sent to Paine on June 15, found that the failure began in the service module's number2 oxygen tank. Damaged Teflon insulation on the wires to the stirring fan inside Oxygen Tank2 allowed the wires to short circuit and ignite this insulation. The resulting fire increased the pressure inside the tank until the tank dome failed, filling the fuel cell bay (SM Sector4) with rapidly expanding gaseous oxygen and combustion products. The pressure rise was sufficient to pop the rivets holding the aluminum exterior panel covering Sector4 and blow it out, exposing the sector to space and snuffing out the fire. The detached panel hit the nearby high-gain antenna, disabling the narrow-beam communication mode and interrupting communication with Earth for 1.8 seconds while the system automatically switched to the backup wide-beam mode. The sectors of the SM were not airtight from each other, and had there been time for the entire SM to become as pressurized as Sector4, the force on the CM's heat shield would have separated the two modules. The report questioned the use of Teflon and other materials shown to be flammable in supercritical oxygen, such as aluminum, within the tank. The board found no evidence pointing to any other theory of the accident. Mechanical shock forced the oxygen valves closed on the number1 and number3 fuel cells, putting them out of commission. The sudden failure of Oxygen Tank2 compromised Oxygen Tank1, causing its contents to leak out, possibly through a damaged line or valve, over the next 130 minutes, entirely depleting the SM's oxygen supply. With both SM oxygen tanks emptying, and with other damage to the SM, the mission had to be aborted. The board praised the response to the emergency: "The imperfection in Apollo 13 constituted a near disaster, averted only by outstanding performance on the part of the crew and the ground control team which supported them." Oxygen Tank 2 was manufactured by the Beech Aircraft Company of Boulder, Colorado, as subcontractor to North American Rockwell (NAR) of Downey, California, prime contractor for the CSM. It contained two thermostatic switches, originally designed for the command module's 28-volt DC power, but which could fail if subjected to the 65 volts used during ground testing at KSC. Under the original 1962 specifications, the switches would be rated for 28 volts, but revised specifications issued in 1965 called for 65 volts to allow for quicker tank pressurization at KSC. Nonetheless, the switches Beech used were not rated for 65 volts. At NAR's facility, Oxygen Tank 2 had been originally installed in an oxygen shelf placed in the Apollo 10 service module, SM-106, but which was removed to fix a potential electromagnetic interference problem and another shelf substituted. During removal, the shelf was accidentally dropped at least , because a retaining bolt had not been removed. The probability of damage from this was low, but it is possible that the fill line assembly was loose and made worse by the fall. After some retesting (which did not include filling the tank with liquid oxygen), in November 1968 the shelf was re-installed in SM-109, intended for Apollo 13, which was shipped to KSC in June 1969. The Countdown Demonstration Test took place with SM-109 in its place near the top of the Saturn V and began on March 16, 1970. During the test, the cryogenic tanks were filled, but Oxygen Tank 2 could not be emptied through the normal drain line, and a report was written documenting the problem. After discussion among NASA and the contractors, attempts to empty the tank resumed on March 27. When it would not empty normally, the heaters in the tank were turned on to boil off the oxygen. The thermostatic switches were designed to prevent the heaters from raising the temperature higher than , but they failed under the 65-volt power supply applied. Temperatures on the heater tube within the tank may have reached , most likely damaging the Teflon insulation. The temperature gauge was not designed to read higher than , so the technician monitoring the procedure detected nothing unusual. This heating had been approved by Lovell and Mattingly of the prime crew, as well as by NASA managers and engineers. Replacement of the tank would have delayed the mission by at least a month. The tank was filled with liquid oxygen again before launch; once electric power was connected, it was in a hazardous condition. The board found that Swigert's activation of the Oxygen Tank2 fan at the request of Mission Control caused an electric arc that set the tank on fire. The board conducted a test of an oxygen tank rigged with hot-wire ignitors that caused a rapid rise in temperature within the tank, after which it failed, producing telemetry similar to that seen with the Apollo 13 Oxygen Tank 2. Tests with panels similar to the one that was seen to be missing on SM Sector4 caused separation of the panel in the test apparatus. Changes in response For Apollo 14 and subsequent missions, the oxygen tank was redesigned, the thermostats being upgraded to handle the proper voltage. The heaters were retained since they were necessary to maintain oxygen pressure. The stirring fans, with their unsealed motors, were removed, which meant the oxygen quantity gauge was no longer accurate. This required adding a third tank so that no tank would go below half full. The third tank was placed in Bay1 of the SM, on the side opposite the other two, and was given an isolation valve that could isolate it from the fuel cells and from the other two oxygen tanks in an emergency and allow it to feed the CM's environmental system only. The quantity probe was upgraded from aluminum to stainless steel. All electrical wiring in Bay4 was sheathed in stainless steel. The fuel cell oxygen supply valves were redesigned to isolate the Teflon-coated wiring from the oxygen. The spacecraft and Mission Control monitoring systems were modified to give more immediate and visible warnings of anomalies. An emergency supply of of water was stored in the CM, and an emergency battery, identical to those that powered the LM's descent stage, was placed in the SM. The LM was modified to make transfer of power from the LM to the CM easier. Aftermath On February 5, 1971, Apollo 14's LM, Antares, landed on the Moon with astronauts Alan Shepard and Edgar Mitchell aboard, near Fra Mauro, the site Apollo 13 had been intended to explore. Haise served as CAPCOM during the descent to the Moon, and during the second EVA, during which Shepard and Mitchell explored near Cone crater. None of the Apollo 13 astronauts flew in space again. Lovell retired from NASA and the Navy in 1973, entering the private sector. Swigert was to have flown on the 1975 Apollo–Soyuz Test Project (the first joint mission with the Soviet Union) but was removed as part of the fallout from the Apollo 15 postal covers incident. He took a leave of absence from NASA in 1973 and left the agency to enter politics, being elected to the House of Representatives in 1982, but died of cancer before he could be sworn in. Haise was slated to have been the commander of the canceled Apollo 19 mission, and flew the Space Shuttle Approach and Landing Tests before retiring from NASA in 1979. Several experiments were completed during Apollo 13, even though the mission did not land on the Moon. One involved the launch vehicle's S-IVB (the Saturn V's third stage), which on prior missions had been sent into solar orbit once detached. The seismometer left by Apollo 12 had detected frequent impacts of small objects onto the Moon, but larger impacts would yield more information about the Moon's crust, so it was decided that, beginning with Apollo 13, the S-IVB would be crashed into the Moon. The impact occurred at 77:56:40 into the mission and produced enough energy that the gain on the seismometer, from the impact, had to be reduced. An experiment to measure the amount of atmospheric electrical phenomena during the ascent to orbitadded after Apollo 12 was struck by lightningreturned data indicating a heightened risk during marginal weather. A series of photographs of Earth, taken to test whether cloud height could be determined from synchronous satellites, achieved the desired results. As a joke, Grumman issued an invoice to North American Rockwell, prime contractor for the CSM, for "towing" the CSM most of the way to the Moon and back. Line items included 400001 miles at $1 each (plus $4 for the first mile); $536.05 for battery charging; oxygen; and four nights at $8 per night for an "additional guest in room" (Swigert). After a 20% "commercial discount", and a 2% discount for timely payment, the final total was $312,421.24. North American declined payment, noting that it had ferried three previous Grumman LMs to the Moon without compensation. The CM was disassembled for testing and parts remained in storage for years; some were used for a trainer for the Skylab Rescue Mission. That trainer was subsequently displayed at the Kentucky Science Center. Max Ary of the Cosmosphere made it a project to restore Odyssey; it is on display there, in Hutchinson, Kansas. Apollo 13 was called a "successful failure" by Lovell. Mike Massimino, a Space Shuttle astronaut, stated that Apollo 13 "showed teamwork, camaraderie and what NASA was really made of". The response to the accident has been repeatedly called "NASA's finest hour"; it is still viewed that way. Author Colin Burgess wrote, "the life-or-death flight of Apollo 13 dramatically evinced the colossal risks inherent in manned spaceflight. Then, with the crew safely back on Earth, public apathy set in once again." William R. Compton, in his book about the Apollo Program, said of Apollo 13, "Only a heroic effort of real-time improvisation by mission operations teams saved the crew." Rick Houston and Milt Heflin, in their history of Mission Control, stated, "Apollo 13 proved mission control could bring those space voyagers back home again when their lives were on the line." Former NASA chief historian Roger D. Launius wrote, "More than any other incident in the history of spaceflight, recovery from this accident solidified the world's belief in NASA's capabilities". Nevertheless, the accident convinced some officials, such as Manned Spaceflight Center director Gilruth, that if NASA kept sending astronauts on Apollo missions, some would inevitably be killed, and they called for as quick an end as possible to the program. Nixon's advisers recommended canceling the remaining lunar missions, saying that a disaster in space would cost him political capital. Budget cuts made such a decision easier, and during the pause after Apollo 13, two missions were canceled, meaning that the program ended with Apollo 17 in December 1972. Popular culture, media and 50th anniversary The 1974 movie Houston, We've Got a Problem, while set around the Apollo 13 incident, is a fictional drama about the crises faced by ground personnel when the emergency disrupts their work schedules and places further stress on their lives. Lovell publicly complained about the movie, saying it was "fictitious and in poor taste". "Houston... We've Got a Problem" was the title of an episode of the BBC documentary series A Life At Stake, broadcast in March 1978. This was an accurate, if simplified, reconstruction of the events. In 1994, during the 25th anniversary of Apollo 11, PBS released a 90-minute documentary titled Apollo 13: To the Edge and Back. Following the flight, the crew planned to write a book, but they all left NASA without starting it. After Lovell retired in 1991, he was approached by journalist Jeffrey Kluger about writing a non-fiction account of the mission. Swigert died in 1982 and Haise was no longer interested in such a project. The resultant book, Lost Moon: The Perilous Voyage of Apollo 13, was published in 1994. The next year, in 1995, a film adaptation of the book, Apollo 13, was released, directed by Ron Howard and starring Tom Hanks as Lovell, Bill Paxton as Haise, Kevin Bacon as Swigert, Gary Sinise as Mattingly, Ed Harris as Kranz, and Kathleen Quinlan as Marilyn Lovell. James Lovell, Kranz, and other principals have stated that this film depicted the events of the mission with reasonable accuracy, given that some dramatic license was taken. For example, the film changes the tense of Lovell's famous follow-up to Swigert's original words from, "Houston, we've had a problem" to "Houston, we have a problem". The film also invented the phrase "Failure is not an option", uttered by Harris as Kranz in the film; the phrase became so closely associated with Kranz that he used it for the title of his 2000 autobiography. The film won two of the nine Academy Awards it was nominated for, Best Film Editing and Best Sound. In the 1998 miniseries From the Earth to the Moon, co-produced by Hanks and Howard, the mission is dramatized in the episode "We Interrupt This Program". Rather than showing the incident from the crew's perspective as in the Apollo 13 feature film, it is instead presented from an Earth-bound perspective of television reporters competing for coverage of the event. In 2020, the BBC World Service began airing 13 Minutes to the Moon, radio programs which draw on NASA audio from the mission, as well as archival and recent interviews with participants. Episodes began airing for Season 2 starting on March 8, 2020, with episode 1, "Time bomb: Apollo 13", explaining the launch and the explosion. Episode 2 details Mission Control's denial and disbelief of the accident, with other episodes covering other aspects of the mission. The seventh and final episode was delayed due to the COVID-19 pandemic. In "Delay to Episode 7", the BBC explained that the presenter of the series, medical doctor Kevin Fong, had been called into service. In advance of the 50th anniversary of the mission in 2020, an Apollo in Real Time site for the mission went online, allowing viewers to follow along as the mission unfolds, view photographs and video, and listen to audio of conversations between Houston and the astronauts as well as between mission controllers. Due to the COVID-19 pandemic, NASA did not hold any in-person events during April 2020 for the flight's 50th anniversary, but premiered a new documentary, Apollo 13: Home Safe on April 10, 2020. A number of events were rescheduled for later in 2020. Gallery Notes References Sources External links NASA reports "Apollo 13: Lunar exploration experiments and photography summary" (Original mission as planned) (PDF) NASA, February 1970 All NASA mission transcripts "Apollo 13 Technical Air-to-Ground Voice Transcription" (PDF) NASA, April 1970 Multimedia Fred Haise Jim Lovell Jack Swigert Apollo program missions Spacecraft launched by Saturn rockets Articles containing video clips Crewed missions to the Moon

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https://en.wikipedia.org/wiki/Apollo%207

Apollo 7

Apollo 7 (October 11–22, 1968) was the first crewed flight in NASA's Apollo program, and saw the resumption of human spaceflight by the agency after the fire that had killed the three Apollo 1 astronauts during a launch rehearsal test on January 27, 1967. The Apollo7 crew was commanded by Walter M. Schirra, with command module pilot Donn F. Eisele and lunar module pilot R. Walter Cunningham (so designated even though Apollo7 did not carry a Lunar Module). The three astronauts were originally designated for the second crewed Apollo flight, and then as backups for Apollo1. After the Apollo1 fire, crewed flights were suspended while the cause of the accident was investigated and improvements made to the spacecraft and safety procedures, and uncrewed test flights made. Determined to prevent a repetition of the fire, the crew spent long periods monitoring the construction of their Apollo command and service modules (CSM). Training continued over much of the pause that followed the Apollo1 disaster. Apollo 7 was launched on October 11, 1968, from Cape Kennedy Air Force Station, Florida, and splashed down in the Atlantic Ocean eleven days later. Extensive testing of the CSM took place, and also the first live television broadcast from an American spacecraft. Despite tension between the crew and ground controllers, the mission was a complete technical success, giving NASA the confidence to send Apollo 8 into orbit around the Moon two months later. In part because of these tensions, none of the crew flew in space again, though Schirra had already announced he would retire from NASA after the flight. Apollo7 fulfilled Apollo1's mission of testing the CSM in low Earth orbit, and was a significant step towards NASA's goal of landing astronauts on the Moon. Background and personnel Schirra, one of the original "Mercury Seven" astronauts, graduated from the United States Naval Academy in 1945. He flew Mercury-Atlas 8 in 1962, the fifth crewed flight of Project Mercury and the third to reach orbit, and in 1965 was the command pilot for Gemini 6A. He was a 45-year-old captain in the Navy at the time of Apollo7. Eisele graduated from the Naval Academy in 1952 with a B.S. in aeronautics. He elected to be commissioned in the Air Force, and was a 38-year-old major at the time of Apollo7. Cunningham joined the U.S. Navy in 1951, began flight training the following year, and served in a Marine flight squadron from 1953 to 1956, and was a civilian, aged 36, serving in the Marine Corps reserves with a rank of major, at the time of Apollo7. He received degrees in physics from UCLA, a B.A. in 1960 and an M.A. in 1961. Both Eisele and Cunningham were selected as part of the third group of astronauts in 1963. Eisele was originally slotted for a position on Gus Grissom's Apollo 1 crew along with Ed White, but days prior to the official announcement on March 25, 1966, Eisele sustained a shoulder injury that would require surgery. Instead, Roger Chaffee was given the position and Eisele was reassigned to Schirra's crew. Schirra, Eisele, and Cunningham were first named as an Apollo crew on September 29, 1966. They were to fly a second Earth orbital test of the Apollo Command Module (CM). Although delighted as a rookie to be assigned to a prime crew without having served as a backup, Cunningham was troubled by the fact that a second Earth orbital test flight, dubbed Apollo2, seemed unnecessary if Apollo1 was successful. He learned later that Director of Flight Crew Operations Deke Slayton, another of the Mercury Seven who had been grounded for medical reasons and supervised the astronauts, planned, with Schirra's support, to command the mission if he gained medical clearance. When this was not forthcoming, Schirra remained in command of the crew, and in November 1966, Apollo2 was cancelled and Schirra's crew assigned as backup to Grissom's. Thomas P. Stafford—assigned at that point as the backup commander of the second orbital test—stated that the cancellation followed Schirra and his crew submitting a list of demands to NASA management (Schirra wanted the mission to include a lunar module and a CM capable of docking with it), and that the assignment as backups left Schirra complaining that Slayton and Chief Astronaut Alan Shepard had destroyed his career. On January 27, 1967, Grissom's crew was conducting a launch-pad test for their planned February 21 mission, when a fire broke out in the cabin, killing all three men. A complete safety review of the Apollo program followed. Soon after the fire, Slayton asked Schirra, Eisele and Cunningham to fly the first mission after the pause. Apollo 7 would use the BlockII spacecraft designed for the lunar missions, as opposed to the Block I CSM used for Apollo 1, which was intended only to be used for the early Earth-orbit missions, as it lacked the capability of docking with a lunar module. The CM and astronauts' spacesuits had been extensively redesigned, to reduce any chance of a repeat of the accident which killed the first crew. Schirra's crew would test the life support, propulsion, guidance and control systems during this "open-ended" mission (meaning it would be extended as it passed each test). The duration was limited to 11 days, reduced from the original 14-day limit for Apollo1. The backup crew consisted of Stafford as commander, John W. Young as command module pilot, and Eugene A. Cernan as lunar module pilot. They became the prime crew of Apollo 10. Ronald E. Evans, John L. 'Jack' Swigert, and Edward G. Givens were assigned to the support crew for the mission. Givens died in a car accident on June 6, 1967, and William R. Pogue was assigned as his replacement. Evans was involved in hardware testing at Kennedy Space Center (KSC). Swigert was the launch capsule communicator (CAPCOM) and worked on the mission's operational aspects. Pogue spent time modifying procedures. The support crew also filled in when the primary and backup crews were unavailable. CAPCOMs, the person in Mission Control responsible for communicating with the spacecraft (then always an astronaut) were Evans, Pogue, Stafford, Swigert, Young and Cernan. Flight directors were Glynn Lunney, Gene Kranz and Gerry Griffin. Preparation According to Cunningham, Schirra originally had limited interest in making a third spaceflight, beginning to focus on his post-NASA career. Flying the first mission after the fire changed things: "Wally Schirra was being pictured as the man chosen to rescue the manned space program. And that was a task worthy of Wally's interest." Eisele noted, "coming on the heels of the fire, we knew the fate and future of the entire manned space program—not to mention our own skins—was riding on the success or failure of Apollo7." Given the circumstances of the fire, the crew initially had little confidence in the staff at North American Aviation's plant at Downey, California, who built the Apollo command modules, and they were determined to follow their craft every step of the way through construction and testing. This interfered with training, but the simulators of the CM were not yet ready, and they knew it would be a long time until they launched. They spent long periods at Downey. Simulators were constructed at Houston's Manned Spacecraft Center and at KSC in Florida. Once these were available for use, the crew had difficulty finding enough time to do everything, even with the help of the backup and support crews; the crew often worked 12 or 14 hours per day. After the CM was completed and shipped to KSC, the focus of the crew's training shifted to Florida, though they went to Houston for planning and technical meetings. Rather than return to their Houston homes for the weekend, they often had to remain at KSC in order to participate in training or spacecraft testing. According to former astronaut Tom Jones in a 2018 article, Schirra, "with indisputable evidence of the risks his crew would be taking, now had immense leverage with management at NASA and North American, and he used it. In conference rooms or on the spacecraft assembly line, Schirra got his way." The Apollo 7 crew spent five hours in training for every hour they could expect to remain aboard if the mission went its full eleven days. In addition, they attended technical briefings and pilots' meetings, and studied on their own. They undertook launch pad evacuation training, water egress training to exit the vehicle after splashdown, and learned to use firefighting equipment. They trained on the Apollo Guidance Computer at MIT. Each crew member spent 160 hours in CM simulations, in some of which Mission Control in Houston participated live. The "plugs out" test—the test that had killed the Apollo1 crew—was conducted with the prime crew in the spacecraft, but with the hatch open. One reason the Apollo1 crew had died was because it was impossible to open the inward-opening hatch before the fire raced through the cabin; this was changed for Apollo7. Command modules similar to that used on Apollo7 were subjected to tests in the run-up to the mission. A three-astronaut crew (Joseph P. Kerwin, Vance D. Brand and Joe H. Engle) was inside a CM that was placed in a vacuum chamber at the Manned Spaceflight Center in Houston for eight days in June 1968 to test spacecraft systems. Another crew (James Lovell, Stuart Roosa and Charles M. Duke) spent 48 hours at sea aboard a CM lowered into the Gulf of Mexico from a naval vessel in April 1968, to test how systems would respond to seawater. Further tests were conducted the following month in a tank at Houston. Fires were set aboard a boilerplate CM using various atmospheric compositions and pressures. The results led to the decision to use 60 percent oxygen and 40 percent nitrogen within the CM at launch, which would be replaced with a lower pressure of pure oxygen within four hours, as providing adequate fire protection. Other boilerplate spacecraft were subjected to drops to test parachutes, and to simulate the likely damage if a CM came down on land. All results were satisfactory. During the run-up to the mission, the Soviets sent uncrewed probes Zond 4 and Zond 5 (Zond 5 carried two tortoises) around the Moon, seeming to foreshadow a circumlunar crewed mission. NASA's Lunar Module (LM) was suffering delays, and Apollo Program Spacecraft Manager George Low proposed that if Apollo7 was a success, that Apollo 8 go to lunar orbit without a LM. The acceptance of Low's proposal raised the stakes for Apollo7. According to Stafford, Schirra "clearly felt the full weight of the program riding on a successful mission and as a result became more openly critical and more sarcastic." Throughout the Mercury and Gemini programs, McDonnell Aircraft engineer Guenter Wendt led the spacecraft launch pad teams, with ultimate responsibility for condition of the spacecraft at launch. He earned the astronauts' respect and admiration, including Schirra's. However, the spacecraft contractor had changed from McDonnell (Mercury and Gemini) to North American (Apollo), so Wendt was not the pad leader for Apollo1. So adamant was Schirra in his desire to have Wendt back as pad leader for his Apollo flight, that he got his boss Slayton to persuade North American management to hire Wendt away from McDonnell, and Schirra personally lobbied North American's launch operations manager to change Wendt's shift from midnight to day so he could be pad leader for Apollo7. Wendt remained as pad leader for the entire Apollo program. When he departed the spacecraft area as the pad was evacuated prior to launch, after Cunningham said, "I think Guenter's going", Eisele responded "Yes, I think Guenter went." Hardware Spacecraft The Apollo 7 spacecraft included Command and Service Module 101 (CSM-101) the first BlockII CSM to be flown. The BlockII craft had the capability of docking with a LM, though none was flown on Apollo7. The spacecraft also included the launch escape system and a spacecraft-lunar module adapter (SLA, numbered as SLA-5), though the latter included no LM and instead provided a mating structure between the SM and the S-IVB's Instrument Unit, with a structural stiffener substituted for the LM. The launch escape system was jettisoned after S-IVB ignition, while the SLA was left behind on the spent S-IVB when the CSM separated from it in orbit. Following the Apollo 1 fire, the BlockII CSM was extensively redesigned—more than 1,800 changes were recommended, of which 1,300 were implemented for Apollo7. Prominent among these was the new aluminum and fiberglass outward-opening hatch, which the crew could open in seven seconds from within, and the pad crew in ten seconds from outside. Other changes included replacement of aluminum tubing in the high-pressure oxygen system with stainless steel, replacement of flammable materials with non-flammable (including changing plastic switches for metal ones) and, for crew protection in the event of a fire, an emergency oxygen system to shield them from toxic fumes, as well as firefighting equipment. After the Gemini 3 craft was dubbed Molly Brown by Grissom, NASA forbade naming spacecraft. Despite this prohibition, Schirra wanted to name his ship "Phoenix," but NASA refused him permission. The first CM to be given a call sign other than the mission designation would be that of Apollo 9, which carried a LM that would separate from it and then re-dock, necessitating distinct call signs for the two vehicles. Launch vehicle Since it flew in low Earth orbit and did not include a LM, Apollo7 was launched with the Saturn IB booster rather than the much larger and more powerful Saturn V. That Saturn IB was designated SA-205, and was the fifth Saturn IB to be flown—the earlier ones did not carry crews into space. It differed from its predecessors in that stronger propellant lines to the augmented spark igniter in the J-2 engines had been installed, so as to prevent a repetition of the early shutdown that had occurred on the uncrewed Apollo 6 flight; postflight analysis had shown that the propellant lines to the J-2 engines, also used in the Saturn V tested on Apollo6, had leaked. The Saturn IB was a two-stage rocket, with the second stage an S-IVB similar to the third stage of the Saturn V, the rocket used by all later Apollo missions. The Saturn IB was used after the close of the Apollo Program to bring crews in Apollo CSMs to Skylab, and for the Apollo–Soyuz Test Project. Apollo 7 was the only crewed Apollo mission to launch from Cape Kennedy Air Force Station's Launch Complex 34. All subsequent Apollo and Skylab spacecraft flights (including Apollo–Soyuz) were launched from Launch Complex 39 at the nearby Kennedy Space Center. Launch Complex 34 was declared redundant and decommissioned in 1969, making Apollo7 the last human spaceflight mission to launch from the Cape Air Force Station in the 20th century. Mission highlights The main purposes of the Apollo7 flight were to show that the Block II CM would be habitable and reliable over the length of time required for a lunar mission, to show that the service propulsion system (SPS, the spacecraft's main engine) and the CM's guidance systems could perform a rendezvous in orbit, and later make a precision reentry and splashdown. In addition, there were a number of specific objectives, including evaluating the communications systems and the accuracy of onboard systems such as the propellant tank gauges. Many of the activities aimed at gathering these data were scheduled for early in the mission, so that if the mission was terminated prematurely, they would already have been completed, allowing for fixes to be made prior to the next Apollo flight. Launch and testing Apollo 7, the first crewed American space flight in 22 months, launched from Launch Complex 34 at 11:02:45am EDT (15:02:45UTC) on Friday, October 11, 1968. During the countdown, the wind was blowing in from the east. Launching under these weather conditions was in violation of safety rules, since in the event of a launch vehicle malfunction and abort, the CM might be blown back over land instead of making the usual water landing. Apollo7 was equipped with the old Apollo1-style crew couches, which provided less protection than later ones. Schirra later related that he felt the launch should have been scrubbed, but managers waived the rule and he yielded under pressure. Liftoff proceeded flawlessly; the Saturn IB performed well on its first crewed launch and there were no significant anomalies during the boost phase. The astronauts described it as very smooth. The ascent made the 45-year-old Schirra the oldest person to that point to enter space, and, as it proved, the only astronaut to fly Mercury, Gemini and Apollo missions. Within the first three hours of flight, the astronauts performed two actions which simulated what would be required on a lunar mission. First, they maneuvered the craft with the S-IVB still attached, as would be required for the burn that would take lunar missions to the Moon. Then, after separation from the S-IVB, Schirra turned the CSM around and approached a docking target painted on the S-IVB, simulating the docking maneuver with the lunar module on Moon-bound missions prior to extracting the combined craft. After station keeping with the S-IVB for 20 minutes, Schirra let it drift away, putting between the CSM and it in preparation for the following day's rendezvous attempt. The astronauts also enjoyed a hot lunch, the first hot meal prepared on an American spacecraft. Schirra had brought instant coffee along over the opposition of NASA doctors, who argued it added nothing nutritionally. Five hours after launch, he reported having, and enjoying, his first plastic bag full of coffee. The purpose of the rendezvous was to demonstrate the CSM's ability to match orbits with and rescue a LM after an aborted lunar landing attempt, or following liftoff from the lunar surface. This was to occur on the second day; but by the end of the first, Schirra had reported he had a cold, and, despite Slayton coming on the loop to argue in favor, declined Mission Control's request that the crew power up and test the onboard television camera prior to the rendezvous, citing the cold, that the crew had not eaten, and that there was already a very full schedule. The rendezvous was complicated by the fact that the Apollo7 spacecraft lacked a rendezvous radar, something the Moon-bound missions would have. The SPS, the engine that would be needed to send later Apollo CSMs into and out of lunar orbit, had been fired only on a test stand. Although the astronauts were confident it would work, they were concerned it might fire in an unexpected manner, necessitating an early end to the mission. The burns would be computed from the ground but the final work in maneuvering up to the S-IVB would require Eisele to use the telescope and sextant to compute the final burns, with Schirra applying the ship's reaction control system (RCS) thrusters. Eisele was startled by the violent jolt caused by activating the SPS. The thrust caused Schirra to yell, "Yabba dabba doo!" in reference to The Flintstones cartoon. Schirra eased the craft close to the S-IVB, which was tumbling out of control, successfully completing the rendezvous. The first television broadcast took place on October 14. It began with a view of a card reading "From the Lovely Apollo Room high atop everything", recalling tag lines used by band leaders on 1930s radio broadcasts. Cunningham served as camera operator with Eisele as emcee. During the seven-minute broadcast, the crew showed off the spacecraft and gave the audience views of the southern United States. Before the close, Schirra held another sign, "Keep those cards and letters coming in folks", another old-time radio tag line that had been used recently by Dean Martin. This was the first live television broadcast from an American spacecraft (Gordon Cooper had transmitted slow scan television pictures from Faith7 in 1963, but the pictures were of poor quality and were never broadcast). According to Jones, "these apparently amiable astronauts delivered to NASA a solid public relations coup." Daily television broadcasts of about 10 minutes each followed, during which the crew held up more signs and educated their audience about spaceflight; after the return to Earth, they were awarded a special Emmy for the telecasts. Later on October 14, the craft's onboard radar receiver was able to lock onto a ground-based transmitter, again showing a CSM in lunar orbit could keep contact with a LM returning from the Moon's surface. Throughout the remainder of the mission, the crew continued to run tests on the CSM, including of the propulsion, navigation, environmental, electrical and thermal control systems. All checked out well; according to authors Francis French and Colin Burgess, "The redesigned Apollo spacecraft was better than anyone had dared to hope." Eisele found that navigation was not as easy as anticipated; he found it difficult to use Earth's horizon in sighting stars due to the fuzziness of the atmosphere, and water dumps made it difficult to discern which glistening points were stars and which ice particles. By the end of the mission, the SPS engine had been fired eight times without any problems. One difficulty that was encountered was with the sleep schedule, which called for one crew member to remain awake at all times; Eisele was to remain awake while the others slept, and sleep during part of the time the others were awake. This did not work well, as it was hard for crew members to work without making a disturbance. Cunningham later remembered waking up to find Eisele dozing. Conflict and splashdown Schirra was angered by NASA managers allowing the launch to proceed despite the winds, saying "The mission pushed us to the wall in terms of risk." Jones said, "This prelaunch dispute was the prelude to a tug of war over command decisions for the rest of the mission." Lack of sleep and Schirra's cold probably contributed to the conflict between the astronauts and Mission Control that surfaced from time to time during the flight. The testing of the television resulted in a disagreement between the crew and Houston. Schirra stated at the time, "You've added two burns to this flight schedule, and you've added a urine water dump; and we have a new vehicle up here, and I can tell you at this point, TV will be delayed without any further discussion until after the rendezvous." Schirra later wrote, "we'd resist anything that interfered with our main mission objectives. On this particular Saturday morning a TV program clearly interfered." Eisele agreed in his memoirs, "We were preoccupied with preparations for that critical exercise and didn't want to divert our attention with what seemed to be trivialities at the time.... Evidently the earth people felt differently; there was a real stink about the hotheaded, recalcitrant Apollo7 crew who wouldn't take orders." French and Burgess wrote, "When this point is considered objectively—that in a front-loaded mission the rendezvous, alignment, and engine tests should be done before television shows—it is hard to argue with him [Schirra]." Although Slayton gave in to Schirra, the commander's attitude surprised flight controllers. On Day 8, after being asked to follow a new procedure passed up from the ground that caused the computer to freeze, Eisele radioed, "We didn't get the results that you were after. We didn't get a damn thing, in fact... you bet your ass... as far as we're concerned, somebody down there screwed up royally when he laid that one on us." Schirra later stated his belief that this was the one main occasion when Eisele upset Mission Control. The next day saw more conflict, with Schirra telling Mission Control after having to make repeated firings of the RCS system to keep the spacecraft stable during a test, "I wish you would find out the idiot's name who thought up this test. I want to find out, and I want to talk to him personally when I get back down." Eisele joined in, "While you are at it, find out who dreamed up 'P22 horizon test'; that is a beauty also." A further source of tension between Mission Control and the crew was that Schirra repeatedly expressed the view that the reentry should be conducted with their helmets off. He perceived a risk that their eardrums might burst due to the sinus pressure from their colds, and they wanted to be able to pinch their noses and blow to equalize the pressure as it increased during reentry. This would have been impossible wearing the helmets. Over several days, Schirra refused advice from the ground that the helmets should be worn, stating it was his prerogative as commander to decide this, though Slayton warned him he would have to answer for it after the flight. Schirra stated in 1994, "In this case I had a cold, and I'd had enough discussion with the ground, and I didn't have much more time to talk about whether we would put the helmet on or off. I said, essentially, I'm on board, I'm commanding. They could wear all the black armbands they wanted if I was lost or if I lost my hearing. But I had the responsibility for getting through the mission." No helmets were worn during the entry. Director of Flight Operations Christopher C. Kraft demanded an explanation for what he believed was Schirra's insubordination from the CAPCOM, Stafford. Kraft later said, "Schirra was exercising his commander’s right to have the last word, and that was that." Apollo 7 splashed down without incident at 11:11:48 UTC on October 22, 1968, SSW of Bermuda and north of the recovery ship USS Essex. The mission's duration was 10days, 20hours, 9minutes and 3seconds. Assessment and aftermath After the mission, NASA awarded Schirra, Eisele and Cunningham its Exceptional Service Medal in recognition of their success. On November 2, 1968, President Lyndon Johnson held a ceremony at the LBJ Ranch in Johnson City, Texas, to present the astronauts with the medals. He also presented NASA's highest honor, the Distinguished Service Medal, to recently retired NASA administrator James E. Webb, for his "outstanding leadership of America's space program" since the beginning of Apollo. Johnson also invited the crew to the White House, and they went there in December 1968. Despite the difficulties between the crew and Mission Control, the mission successfully met its objectives to verify the Apollo command and service module's flightworthiness, allowing Apollo8's flight to the Moon to proceed just two months later. John T. McQuiston wrote in The New York Times after Eisele's death in 1987 that Apollo7's success brought renewed confidence to NASA's space program. According to Jones, "Three weeks after the Apollo7 crew returned, NASA administrator Thomas Paine green-lighted Apollo8 to launch in late December and orbit the Moon. Apollo7 had delivered NASA from its trial by fire—it was the first small step down a path that would lead another crew, nine months later, to the Sea of Tranquility." General Sam Phillips, the Apollo Program Manager, said at the time, "Apollo7 goes into my book as a perfect mission. We accomplished 101 percent of our objectives." Kraft wrote, "Schirra and his crew did it all—or at least all of it that counted... [T]hey proved to everyone's satisfaction that the SPS engine was one of the most reliable we'd ever sent into space. They operated the Command and Service Modules with true professionalism." Eisele wrote, "We were insolent, high-handed, and Machiavellian at times. Call it paranoia, call it smart—it got the job done. We had a great flight." Kranz stated in 1998, "we all look back now with a longer perspective. Schirra really wasn't on us as bad as it seemed at the time.... Bottom line was, even with a grumpy commander, we got the job done as a team." None of the Apollo 7 crew members flew in space again. According to Jim Lovell, "Apollo7 was a very successful flight—they did an excellent job—but it was a very contentious flight. They all teed off the ground people quite considerably, and I think that kind of put a stop on future flights [for them]." Schirra had announced, before the flight, his retirement from NASA and the Navy, effective July 1, 1969. The other two crew members had their spaceflight careers stunted by their involvement in Apollo7; by some accounts, Kraft told Slayton he was unwilling to work in future with any member of the crew. Cunningham heard the rumors that Kraft had said this and confronted him in early 1969; Kraft denied making the statement "but his reaction wasn't exactly outraged innocence." Eisele's career may also have been affected by becoming the first active astronaut to divorce, followed by a quick remarriage, and an indifferent performance as backup CMP for Apollo10. He resigned from the Astronaut Office in 1970 though he remained with NASA at the Langley Research Center in Virginia until 1972, when he was eligible for retirement. Cunningham was made the leader of the Astronaut Office's Skylab division. He related that he was informally offered command of the first Skylab crew, but when this instead went to Apollo 12 commander Pete Conrad, with Cunningham offered the position of backup commander, he resigned as an astronaut in 1971. Schirra, Eisele and Cunningham were the only crew, of all the Apollo, Skylab and Apollo–Soyuz missions, who had not been awarded the Distinguished Service Medal immediately following their missions (though Schirra had received the medal twice before, for his Mercury and Gemini missions). Therefore, NASA administrator Michael D. Griffin decided to belatedly award the medals to the crew in October 2008, "[f]or exemplary performance in meeting all the Apollo7 mission objectives and more on the first crewed Apollo mission, paving the way for the first flight to the Moon on Apollo8 and the first crewed lunar landing on Apollo11." Only Cunningham was still alive at the time as Eisele had died in 1987 and Schirra in 2007. Eisele's widow accepted his medal, and Apollo 8 crew member Bill Anders accepted Schirra's. Other Apollo astronauts, including Neil Armstrong, Buzz Aldrin, and Alan Bean, were present at the award ceremony. Kraft, who had been in conflict with the crew during the mission, sent a conciliatory video message of congratulations, saying: "We gave you a hard time once but you certainly survived that and have done extremely well since... I am frankly, very proud to call you a friend." Mission insignia The insignia for the flight shows a command and service module with its SPS engine firing, the trail from that fire encircling a globe and extending past the edges of the patch symbolizing the Earth-orbital nature of the mission. The Roman numeralVII appears in the South Pacific Ocean and the crew's names appear on a wide black arc at the bottom. The patch was designed by Allen Stevens of Rockwell International. Spacecraft location In January 1969, the Apollo7 command module was displayed on a NASA float in the inauguration parade of President Richard M. Nixon, as were the Apollo7 astronauts. After being transferred to the Smithsonian Institution in 1970, the spacecraft was loaned to the National Museum of Science and Technology, in Ottawa, Ontario. It was returned to the United States in 2004. Currently, the Apollo7 CM is on loan to the Frontiers of Flight Museum at Love Field in Dallas, Texas. Depiction in media On November 6, 1968, comedian Bob Hope broadcast one of his variety television specials from NASA's Manned Spacecraft Center in Houston to honor the Apollo7 crew. Barbara Eden, star of the popular comedy series I Dream of Jeannie, which featured fictional astronauts among its regular characters, appeared with Schirra, Eisele and Cunningham. Schirra parlayed the head cold he contracted during Apollo7 into a television advertising contract as a spokesman for Actifed, an over-the-counter version of the medicine he took in space. The Apollo 7 mission is dramatized in the 1998 miniseries From the Earth to the Moon episode "We Have Cleared the Tower", with Mark Harmon as Schirra, John Mese as Eisele, Fredric Lehne as Cunningham and Nick Searcy as Slayton. Gallery See also List of Apollo missions Timeline of longest spaceflights Notes References Bibliography Further reading External links Master catalog entry at NASA/NSSDC\ The Apollo Spacecraft: A Chronology NASA, NASA SP-4009 "Apollo Program Summary Report" (PDF), NASA, JSC-09423, April 1975 Apollo 7 1968 in the United States Apollo 07 Human spaceflights Spacecraft launched in 1968 Spacecraft which reentered in 1968 October 1968 events Spacecraft launched by Saturn rockets Wally Schirra