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2654

https://en.wikipedia.org/wiki/Abatement%20of%20debts%20and%20legacies

Abatement of debts and legacies

Abatement of debts and legacies is a common law doctrine of wills that holds that when the equitable assets of a deceased person are not sufficient to satisfy fully all the creditors, their debts must abate proportionately, and they must accept a dividend. In the case of legacies when the funds or assets out of which they are payable are not sufficient to pay them in full, the legacies abate in proportion, unless there is a priority given specially to any particular legacy. Annuities are also subject to the same rule as general legacies. The order of abatement is usually: Intestate property The residuary of the estate General Devises—i.e., cash gifts Demonstrative Devises—i.e., cash gifts from a specific account, stocks, bonds, securities, etc. Specific Devises—i.e., specified items of personal property, real property, etc. Non-probate property—i.e., life insurance policies—do not abate. Definitions A specific devise, is a specific gift in a will to a specific person other than an amount of money. For example, if James's will states that he is leaving his $500,000 yacht to his brother Mike, the yacht would be a specific devise. A general devise, is a monetary gift to a specific person to be satisfied out of the overall estate. For example, if James's will states that he is leaving $500,000 to his son Sam then the money would be a general devise. A demonstrative devise, is money given from a particular account. For example, "$10,000 to be paid from the sale of my GM stock." A residual devise is one left to a devisee after all specific and general devices have been made. For example, James's will might say: "I give all the rest, residue and remainder of my estate to my daughter Lilly." Lilly would be the residual devisee and entitled to James's residuary estate. References Common law Wills and trusts

2661

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

Affection

Affection or fondness is a "disposition or state of mind or body" that is often associated with a feeling or type of love. It has given rise to a number of branches of philosophy and psychology concerning emotion, disease, influence, and state of being. "Affection" is popularly used to denote a feeling or type of love, amounting to more than goodwill or friendship. Writers on ethics generally use the word to refer to distinct states of feeling, both lasting and spasmodic. Some contrast it with passion as being free from the distinctively sensual element. Even a very simple demonstration of affection can have a broad variety of emotional reactions, from embarrassment, to disgust, pleasure, and annoyance. It also has a different physical effect on the giver and the receiver. Restricted definition More specifically, the word has been restricted to emotional states, the object of which is a living thing such as a human or animal. Affection is compared with passion, from the Greek "pathos". As such it appears in the writings of French philosopher René Descartes, Dutch philosopher Baruch Spinoza, and most of the writings of early British ethicists. However, on various grounds (e.g., that it does not involve anxiety or excitement and that it is comparatively inert and compatible with the entire absence of the gratifyingly physical element), it is generally distinguished from passion. In this narrower sense, the word has played a great part in ethical systems, which have spoken of the social or parental affections as in some sense a part of moral obligations. For a consideration of these and similar problems, which depend ultimately on the degree in which the affections are regarded as voluntary. Expression Affection can be communicated by looks, words, gestures, or touches. It conveys love and social connection. The five love languages deeply explains how couples can communicate affections to each other. Affectionate behavior may have evolved from parental nurturing behavior due to its associations with hormonal rewards. Such affection has been shown to influence brain development in infants, especially their biochemical systems and prefrontal development. Expressions of affection can be unwelcome if they pose implied threats to one's well-being. If welcomed, affectionate behavior may be associated with various health benefits. It has been proposed that positive sentiments increase the propensity of people to interact and that familiarity gained through affection increases positive sentiments among them. Benefits of affection Affection exchange is seen as an adaptive human behavior that contributes to greater physical and mental well-being. The expression of affection mediates emotional, physical, and relational benefits for the individual and significant counterparts. The communication of positive feelings towards others has shown health benefits that include lower stress hormones, lower cholesterol, lower blood pressure and stronger immune system. Benefits are internally noticed when the emotion is expressed and not merely felt; if affection is not reciprocated through the receiver, effects of the affection are still felt through the giver. Parental relationships Affectionate behavior is often regarded as the result of parental nurturing behavior due to its associations with hormonal rewards. Positive and negative parental behaviors can be linked to later life health problems. Abuse is a common attribute to poor health in later life, as the lack of affection leads to naturally poorer well-being and mental health. A 2013 study showed the effects of early child abuse and the outcome between lack of affection and the strong biological link for how these negative early-life experiences affect physical health. Affectionism Affectionism is a school of thought which considers affections as central importance. Although it is not found in mainstream Western philosophy, it does exist in Indian philosophy. See also Affectional orientation Affective filter Affective videogames Attraction Crush Doctrine of the affections Emotion Hug Infatuation List of emotions Social connection The Four Loves Terms of endearment References External links Phrenology Emotions Love Personal life

2662

https://en.wikipedia.org/wiki/Affiliation%20%28family%20law%29

Affiliation (family law)

In law, affiliation (from Latin affiliare, "to adopt as a son") was previously the term to describe legal establishment of paternity. The following description, for the most part, was written in the early 20th century, and it should be understood as a historical document. Affiliation procedures in England In England a number of statutes on the subject have been passed, the chief being the Bastardy Act of the Parliament of 1845, and the Bastardy Laws Amendment Acts of 1872 and 1873. The mother of a bastard may summon the putative father to petty sessions within 12 months of the birth (or at any later time if he is proved to have contributed to the child's support within 12 months after the birth), and the justices, after hearing evidence on both sides, may, if the mother's evidence be corroborated in some material particular, adjudge the man to be the putative father of the child, and order him to pay a sum not exceeding five shillings a week for its maintenance, together with a sum for expenses incidental to the birth, or the funeral expenses, if it has died before the date of order, and the costs of the proceedings. An order ceases to be valid after the child reaches the age of 13, but the justices (also referred to as Gold writers under these circumstances) may in the order direct the payments to be continued until the child is 16 years of age. An appeal to quarter sessions is open to the defendant, and a further appeal on questions of law to the King's Bench by rule nisi or certiorari. Should the child afterwards become chargeable to the parish, the sum due by the father may be received by the parish officer. When a bastard child, whose mother has not obtained an order, becomes chargeable to the parish, the guardians may proceed against the putative father for a contribution. Any woman who is single, a widow, or a married woman living apart from her husband, may make an application for a summons, and it is immaterial where the child is begotten, provided it is born in England. An application for a summons may be made before the birth of the child, but in this case, the statement of the mother must be in the form of a sworn deposition. The defendant must be over 14 years of age. No agreement on the part of the woman to take a sum down in a discharge of the liability of the father is a bar to the making of an affiliation order. In the case of twins, it is usual to make separate applications and obtain separate summonses. The Summary Jurisdiction Act (1879) makes due provision for the enforcement of an order of affiliation. In the case of soldiers an affiliation order cannot be enforced in the usual way, but by the Army Act (1881), if an order has been made against a soldier of the regular forces, and a copy of such order be sent to the secretary of state, he may order a portion of the soldier's pay to be retained. There is no such special legislation with regard to sailors in the Royal Navy. Affiliation procedures in other countries In the British colonies, and in the states of the United States (with the exception of California, Idaho, Missouri, Oregon, Texas and Utah), there is some procedure (usually termed filiation) akin to that described above, by means of which a mother can obtain a contribution to the support of her illegitimate child from the putative father. The amount ordered to be paid may subsequently be increased or diminished (1905; 94 N.Y. Supplt. 372). On the continent of Europe, however, the legislation of the various countries differs rather widely. France, Belgium, the Netherlands, Italy, Russia, Serbia and the canton of Geneva provide no means of inquiry into the paternity of an illegitimate child, and consequently all support of the child falls upon the mother; on the other hand, Germany, Austria, Norway, Sweden, Denmark and the majority of the Swiss cantons provide for an inquiry into the paternity of illegitimate children, and the law casts a certain amount of responsibility upon the father. Affiliation, in France, is a term applied to a species of adoption by which the person adopted succeeds equally with other heirs to the acquired, but not to the inherited, property of the deceased. In India, affiliation cases are decided by section 125 of Criminal Procedure Code (Cr.P.C.). According to this section - among other things - if a person having sufficient means neglects or refuses to maintain his illegitimate child, a magistrate of the first class may, upon proof of such neglect or refusal, order such person to make a monthly allowance for the maintenance of such child. See also Adoption Illegitimacy Paternity (law) Poor Laws References External links Family law Wills and trusts

2663

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

Affinity

Affinity may refer to: Commerce, finance and law Affinity (law), kinship by marriage Affinity analysis, a market research and business management technique Affinity fraud, a type of scam targeting a specific demographic Affinity marketing, a method of extending market reach by forming partnerships and cross-selling relationships Affinity Equity Partners, an Asian private equity firm Affinity Credit Union, a Saskatchewan-based credit union Religion and belief Affinity (canon law), a kinship arising from the sexual intercourse of a man and a woman Affinity (Christian organisation), formerly known as the British Evangelical Council Affinity group, a private, non-commercial and non-governmental organisation formed around a shared interest or goal Science and technology Affinity, the UK's first road-legal solar car, built by Cambridge University Eco Racing Affinity (mathematics), an affine transformation preserving collinearity Affinity (pharmacology), a characterisation of protein-ligand binding strength Binding affinity, a measure of the interaction of ligands with their binding sites Affinity (sociology), a shared interest and commitment between persons in groups and/or willingness to associate Affinity (taxonomy), a suggestion of common descent or type Affinity chromatography Affinity electrophoresis Affinity laws, laws used in hydraulics to express relationships between variables involved in fan or pump performance Affine transformation, a type of transformation applied to a geometry Chemical affinity, used to describe or characterise elements' or compounds' readiness to form bonds Electron affinity Processor affinity, a computing term for the assignment of a task to a given core of a multicore CPU Serif Europe's Affinity series of programs Affinity Photo, a raster graphics editor Affinity Designer, a vector illustration editor Affinity Publisher, a desktop publishing application Media-related Music Affinity (band), a jazz/rock band active in the late 60s and early 70s Affinity (Affinity album), their eponymous début album Affinity (Bill Evans album), an album by jazz pianist Bill Evans Affinity (Haken album), an album by the progressive metal band Haken Affinity (Oscar Peterson album), an album by jazz pianist Oscar Peterson Johnny Alegre Affinity, a jazz collective based in Manila Affinity (EP), a 2013 EP by English band Press to Meco Other media Affinity (novel), a 1999 novel by Sarah Waters Affinity (film), a 2008 feature film based on this novel "Affinity" (Stargate SG-1), an episode from season 8 of the TV sci-fi spin-off series Stargate SG-1 Elective Affinities, a novel by Goethe Other uses Affinity (medieval), late medieval retainers of a monarch in "bastard feudalism" Affinity, West Virginia See also Affine (disambiguation) Refining, also known as "affining" Afinidad (disambiguation)

2665

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

Affray

In many legal jurisdictions related to English common law, affray is a public order offence consisting of the fighting of one or more persons in a public place to the terror (in ) of ordinary people. Depending on their actions, and the laws of the prevailing jurisdiction, those engaged in an affray may also render themselves liable to prosecution for assault, unlawful assembly, or riot; if so, it is for one of these offences that they are usually charged. United Kingdom England and Wales The common law offence of affray was abolished for England and Wales on 1 April 1987. Affray is now a statutory offence that is triable either way. It is created by section 3 of the Public Order Act 1986 which provides: The term "violence" is defined by section 8. Section 3(6) once provided that a constable could arrest without warrant anyone he reasonably suspected to be committing affray, but that subsection was repealed by paragraph 26(2) of Schedule 7 to, and Schedule 17 to, the Serious Organised Crime and Police Act 2005, which includes more general provisions for police to make arrests without warrant. The mens rea of affray is that person is guilty of affray only if he intends to use or threaten violence or is aware that his conduct may be violent or threaten violence. The offence of affray has been used by HM Government to address the problem of drunken or violent individuals who cause serious trouble on airliners. In R v Childs & Price (2015), the Court of Appeal quashed a murder verdict and replaced it with affray, having dismissed an allegation of common purpose. Northern Ireland Affray is a serious offence for the purposes of Chapter 3 of the Criminal Justice (Northern Ireland) Order 2008. Australia In New South Wales, section 93C of Crimes Act 1900 defines that a person will be guilty of affray if he or she threatens unlawful violence towards another and his or her conduct is such as would cause a person of reasonable firmness present at the scene to fear for his or her personal safety. A person will only be guilty of affray if the person intends to use or threaten violence or is aware that his or her conduct may be violent or threaten violence. The maximum penalty for an offence of affray contrary to section 93C is a period of imprisonment of 10 years. In Queensland, section 72 of the Criminal Code of 1899 defines affray as taking part in a fight in a public highway or taking part in a fight of such a nature as to alarm the public in any other place to which the public have access. This definition is taken from that in the English Criminal Code Bill of 1880, cl. 96. Section 72 says "Any person who takes part in a fight in a public place, or takes part in a fight of such a nature as to alarm the public in any other place to which the public have access, commits a misdemeanour. Maximum penalty—1 year’s imprisonment." India The Indian Penal Code (sect. 159) adopts the old English common law definition of affray, with the substitution of "actual disturbance of the peace for causing terror to the lieges". New Zealand In New Zealand affray has been codified as "fighting in a public place" by section 7 of the Summary Offences Act 1981. South Africa Under the Roman-Dutch law in force in South Africa affray falls within the definition of vis publica. United States In the United States, the English common law as to affray applies, subject to certain modifications by the statutes of particular states. See also Assault Battery Combat References Blackstones Police Manual Volume 4: General police duties, Fraser Simpson (2006). pp. 247. Oxford University Press. Crimes Legal terminology

2667

https://en.wikipedia.org/wiki/Afghan%20Turkestan

Afghan Turkestan

Afghan Turkestan, also known as Southern Turkestan, is a region in northern Afghanistan, on the border with the former Soviet republics of Turkmenistan, Uzbekistan and Tajikistan. In the 19th century, there was a province in Afghanistan named Turkestan with Mazari Sharif as provincial capital. The province incorporated the territories of the present-day provinces of Balkh, Kunduz, Jowzjan, Sar-e Pol, and Faryab. In 1890, Qataghan-Badakhshan Province was separated from Turkestan Province. It was later abolished by Emir Abdur Rahman. The whole territory of Afghan Turkestan, from the junction of the Kokcha river with the Amu Darya on the north-east to the province of Herat on the south-west, was some in length, with an average width from the Russian frontier to the Hindu Kush of . It thus comprised about or roughly two-ninths of the former Kingdom of Afghanistan. Geography The area is agriculturally poor except in the river valleys, being rough and mountainous towards the south, but subsiding into undulating wastes and pasture-lands towards the Karakum Desert. The province included the khanates of Kunduz, Tashkurgan, Balkh, and Akcha in the east and the four khanates or Chahar Vilayet ("four domains") of Saripul, Shibarghan, Andkhoy (city), and Maymana in the west. Demographics The bulk of the people are Uzbek and Turkmen with large concentrations of Hazara, Tajik and Pashtun. History Ancient Balkh or Bactria was an integral part of Bactria–Margiana Archaeological Complex, and was occupied by Indo-Iranians. In the 5th century BCE, it became a province of the Achaemenian Empire and later became part of the Seleucid Empire. About 250 BC Diodotus (Theodotus), governor of Bactria under the Seleucidae, declared his independence, and commenced the history of the Greco-Bactrian dynasties, which succumbed to Parthian and nomadic movements about 126 BC. After this came a Buddhist era which has left its traces in the gigantic sculptures at Bamian and the rock-cut topes of Haibak. The district was devastated by Genghis Khan, and has never since fully recovered its prosperity. For about a century it belonged to the Delhi empire, and then fell into Uzbek hands. In the 18th century it formed part of the dominion of Ahmad Shah Durrani, and so remained under his son Timur. But under the fratricidal wars of Timur's sons the separate khanates fell back under the independent rule of various Uzbek chiefs. At the beginning of the 19th century they belonged to Bukhara; but under the emir Dost Mahommed the Afghans recovered Balkh and Tashkurgan in 1850, Akcha and the four western khanates in 1855, and Kunduz in 1859. The sovereignty over Andkhoy, Shibarghan, Saripul, and Maymana was in dispute between Bukhara and Kabul until settled by the Anglo-Russian agreement of 1873 in favour of the Afghan claim. Under the strong rule of Abdur Rahman these outlying territories were closely welded to Kabul; but after the accession of Habibullah the bonds once more relaxed. In the late 19th and 20th centuries, many ethnic Pashtuns either voluntarily or involuntarily settled in Afghan Turkestan. In 1890, the district of Qataghan and Badakhshan was divided from Afghan Turkestan and made into the Qataghan-Badakhshan Province. Administration of the province was assigned to the Northern Bureau in Kabul. Notes References Former provinces of Afghanistan Turkestan Turkic toponyms

2668

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

Afyonkarahisar

Afyonkarahisar (, "poppy, opium", kara "black", hisar "fortress") is a city in western Turkey, the capital of Afyon Province. Afyon is in the mountainous countryside inland from the Aegean coast, south-west of Ankara along the Akarçay River. In Turkey, Afyonkarahisar stands out as a capital city of hot springs and spas, an important junction of railway, highway and air traffic in West-Turkey, and the place where independence was won. In addition, Afyonkarahisar is one of the top leading provinces in agriculture, globally renowned for its marble and is the world's largest producer of pharmaceutical opium. Etymology The name Afyon Kara Hisar (literally opium black castle in Turkish), since opium was widely grown here and there is a castle on a black rock. Also known simply as Afyon. Older spellings include Karahisar-i Sahip, Afium-Kara-hissar and Afyon Karahisar. The city was known as Afyon (opium), until the name was changed to Afyonkarahisar by the Turkish Parliament in 2004. History The top of the rock in Afyon has been fortified for a long time. It was known to the Hittites as Hapanuwa, and was later occupied by Phrygians, Lydians and Achaemenid Persians until it was conquered by Alexander the Great. After the death of Alexander the city (now known as Akroinοn (Ακροϊνόν) or Nikopolis (Νικόπολις) in Ancient Greek), was ruled by the Seleucids and the kings of Pergamon, then Rome and Byzantium. The Byzantine emperor Leo III after his victory over Arab besiegers in 740 renamed the city Nicopolis (Greek for "city of victory"). The Seljuq Turks then arrived in 1071 and changed its name to Kara Hissar ("black castle") after the ancient fortress situated upon a volcanic rock 201 meters above the town. Following the dispersal of the Seljuqs the town was occupied by the Sâhib Ata and then the Germiyanids. The castle was much fought over during the Crusades and was finally conquered by the Ottoman Sultan Beyazid I in 1392 but was lost after the invasion of Timur Lenk in 1402. It was recaptured in 1428 or 1429. The area thrived during the Ottoman Empire, as the centre of opium production and Afyon became a wealthy city. In 1902, a fire burning for 32 hours destroyed parts of the city. During the 1st World War British prisoners of war who had been captured at Gallipoli were housed here in an empty Armenian church at the foot of the rock. During the Greco-Turkish War (1919-1922) campaign (part of the Turkish War of Independence) Afyon and the surrounding hills were occupied by Greek forces. However, it was recovered on 27 August 1922, a key moment in the Turkish counter-attack in the Aegean region. After 1923 Afyon became a part of the Republic of Turkey. The region was a major producer of raw opium (hence the name Afyon) until the late 1960s when under international pressure, from the US in particular, the fields were burnt and production ceased. Now poppies are grown under a strict licensing regime. They do not produce raw opium any more but derive Morphine and other opiates using the poppy straw method of extraction. Afyon was depicted on the reverse of the Turkish 50 lira banknote of 1927–1938. Economy The economy of Afyonkarahisar is based on agriculture, industries and thermal tourism. Especially its agriculture is strongly developed from the fact, a large part of its population living in the countrysides. Which stimulated agricultural activities greatly. Marble Afyonkarahisar produces an important chunk of Turkish processed marbles, it ranks second on processed marble exports and fourth on travertine. Afyon holds an important share of Turkish marble reserves, with some 12,2% of total Turkish reserves. Afyon has unique marble types and colors, which were historically very renown and are unique to Afyon. Like "Afyon white", historically known as "Synnadic white". "Afyon Menekse", historically known as "Pavonazzetto" and "Afyon kaplan postu", this type was not popular. Historically marble from Afyon was generally referred to as "Docimeaen marble". Docimian marble was highly admired and valued for its unique colors and fine grained quality, by ancients such as Romans. When the Romans took control over Docimian quarries, they were blown away about the beautiful color combinations of Docimian Pavonazzetto, which is a type of white marble with purple veins. A trend started about it right away. Emperors Augustus, Trajan, Hadrian, all made extensive use of Docimian marble to all their major building projects. Docimian Pavonazzetto was extensively used in major building projects in the very heart of Rome aka Forum Romanum and all over the empire. Pavonazzetto was used on the most eye catching places such as, columns, wall and floor veneer and wall reliefs. Other marbles from all corners of the empire were used in combination, whenever Pavonazzetto was used as floor cover, it was usually in combination with other decorative marbles. But, the Pavonazzetto being a white marble was mostly the dominant color and gave the buildings a freshening white color. One of the greatest Roman architectural piece, the Pantheon contains Docimian Pavonazzetto as floor pavement along with other marble types. The dominant white color is the Pavonazzetto, also some of the interior main columns and pilasters are made from Docimian marble. Other buildings in Roman capital which contains or contained Docimian marble were, Forum of Augustus, Forum of Trajan (floor and 184 column shafts), Temple of Mars Ultor (floor), Temple of Apollo (floor), Basilica Aemelia (20 statues), Basilica Julia (floor and some columns), Basilica Ulpia (some of the columns), Basilica San Paolo Fuori Le Mura (24 columns, destroyed by fire in 1823), The eight statues on the Arch of Constantine, The greatest Roman bath, Baths of Caracalla (some of the columns and wall veneer. Other major buildings outside Rome, Italy were: The Hagia Sophia has Docimian marble as veneer on the aisles and galleries. The heart of Catholic Christianity, Saint Peter's Basilica, as veneer. Lepcis Magna, former limestone columns were replaced with Pavonazzetto. Library of Celsus, the columns on the famous wall. Ancient City of Sagalassos, as wall and floor covering, 40 tons of veneer were recovered. Temple of Zeus and Hera in Greece, 100 columns and wall. Docimian marble was also preferred for sarcophagi sculpting, some emperors preferred this marble for its high value and majestic looks. As a result, one of the greatest masterpieces were made from this material. Such as sarcophagus of, Sidamara, Silifkeh, Seleukeia, Eudocia, Heraclius....several hundreds sarcophagi were constructed. Thermal sector The geography of Afyon has great geothermal activity. Hence, the place has plenty of thermal springs. There are five main springs and all of them have high mineral content with temperatures ranging between 40 and 100 °C. The waters have strong healing properties to some diseases. As a result, plenty of thermal facilities formed over time. In time, Afyon has developed its thermal sector with more capacity, comfort and innovation. Afyon combined the traditional bath houses with 5-star resorts, the health benefits of the natural springs have put the thermal resorts further then a mere attraction. Hospitals and universities have come in association with thermal resorts, to utilize the full health potentials of the thermals. As such, Kocatepe University Physical Therapy and Rehabilitation Hospital opened for that purpose. Afyon now has the largest residence capacity of thermal resorts, of which a large part are 5-star thermal hotels which give medical care with qualified personnel. Spa water Kızılay, was the first mineral water factory in Turkey which opened in Afyon, in 1926 by Atatürk. After the mineral water from Gazligöl springs, healed Atatürk's kidneys and proved its health benefits. Since its foundation, "Kızılay Spa Water" grew as the biggest spa water distributor in Turkey, Middle-East and Balkans. Pharmaceuticals and morphine Almost a third of all the morphine produced in the world derives from alkaloids factory in Afyon, named as "Afyon Alkaloids". this large capacity is the byproduct of Afyon's poppy plantations. The pharmaceuticals derive from the opium of the poppy capsules. "Afyon Alkaloids" factory is the largest of its kind in the world, with high capacity processing ability and modern laboratories. The raw opium is put through a chain of biochemical processes, resulting into several types of morphine. In the Alkaloid Extraction Unit only base morphine is produced. In the adjacent Derivatives Unit half of the morphine extracted is converted to morphine hydrochloride, codeine, codeine phosphate, codeine sulphate, codeine hydrochloride, morphine sulphate, ethylmorphine hydrochloride. Agriculture Livestocks Afyon breeds a large amount of livestocks, its landscape and demography is suitable for this field. As such it ranks in the top 10 within Turkey in terms of amounts of sheep and cattle it has. Meat and meat products As a result of being an important source of livestock, related sectors such as meat and meat products are also very productive in Afyon. Its one of the leading provinces in red meat production and has very prestigious brand marks of sausages, such as "Cumhuriyet Sausages". Eggs Afyon is the sole leader in egg production within Turkey. It has the largest amount of laying hens, with a figure of 12,7 million. And produces a record amount of 6 million eggs per day. Cherries and sour cherries Sour cherries are cultivated in Afyon in very large numbers, so much so that it became very iconic to Afyon. Every year, a sour cherry festival takes place in the Cay district. It is the largest producer of sour cherries in Turkey. The sour cherries grown in Afyon are of excellent quality because of the ideal climate they're grown in. For the same reason Afyon is also an ideal place for cherry cultivation. First quality cherries known as "Napolyon Cherries" are grown in abundance, its one of the top 5 leading provinces. Poppy One of the iconic agricultural practices of Afyon is the cultivation of poppy. Afyon's climate is ideal for the cultivation of this plant, hence a large amount of poppy plantation occurs in this region. Though, a strong limitation came some decades ago from international laws, cause of the opium content of poppy plants peels. Nevertheless, Afyon is the largest producer of poppy in Turkey and accounts for a large amount of global production. Potatoes and sugar-beets Afyon has a durable reputation in potato production, it produces around 8% of Turkish potato need. It ranks in the top 5 in potato, sugar-beets, cucumber and barley production. Climate Afyonkarahisar has a hot dry-summer continental climate (Dsa) under the Köppen classification and a hot summer continental (Dca) or hot summer oceanic climate (Doa) under the Trewartha classification. The winters are cold and snowy and the summers are hot and dry with cool nights. Rainfall occurs mostly during the spring and autumn. Afyon today Afyon is the centre of an agricultural area and the city has a country town feel to it. There is little in the way of bars, cafes, live music or other cultural amenities, and the standards of education are low for a city in the west of Turkey. Afyon Kocatepe University. Afyon is known for its marble (in 2005 there were 355 marble quarries in the province of Afyon producing high quality white stone), its sucuk (spiced sausages), its kaymak (meaning either cream or a white Turkish Delight) and various handmade weavings. There is also a large cement factory. This is a natural crossroads, the routes from Ankara to İzmir and from Istanbul to Antalya intersect here and Afyon is a popular stopping-place on these journeys. There are a number of well-established roadside restaurants for travellers to breakfast on the local cuisine. Some of these places are modern well-equipped hotels and spas; the mineral waters of Afyon are renowned for their healing qualities. There is also a long string of roadside kiosks selling the local Turkish delight. Transport Afyon is also an important rail junction between İzmir, Konya, Ankara and Istanbul. Afyon is on the route of the planned high-speed rail line between Ankara and Izmir. Cuisine Courses sucuk - the famed local speciality, a spicy beef sausage, eaten fried or grilled. The best known brands include Cumhuriyet, Ahmet İpek, İkbal, İtimat and Danet but only 2 brands has the geographical indication and these are Cumhuriyet & Danet (Vahdet Et) . ağzaçık or bükme - filo-style pastry stuffed with cheese or lentils. keşkek - boiled wheat and chick peas stewed with meat. Sweets local cream kaymak eaten with honey, with a bread pudding ekmek kadayıf, or with pumpkin simmered in syrup. Best eaten at the famous Ikbal restaurants (either the old one in the town centre or the big place on the main road). Turkish delight. helva - sweetened ground sesame Main sights Afyonkarahisar Castle Victory Museum (Zafer Müzesi), a national military and war museum, which was used as headquarters by then Commander-in-Chief Mustafa Kemal Pasha (Atatürk), his chief general staff and army commanders before the Great Offensive in August 1922. In the very city center, across the fortress, featuring maps, uniforms, photos, guns from the Greco-Turkish War. The partly ruined fortress which has given the city its name. To reach at the top, eight hundred stairs need to be climbed. The Afyonkarahisar Archaeological Museum which houses thousands of Hellenic, Frigian, Hittite, Roman, Ottoman finds. Afyon Ulu Camii (the Great Mosque) Altıgöz Bridge, like the Ulu Camii built by the Seljuqs in the 13th century. Afyon mansion (Afyon konagi) situated on a hill overlooking the panoramic plain. the White Elephant - Afyon is twinned with the town of Hamm in Germany, and now has a large statue of Hamm's symbolic white elephant. With its rich architectural heritage, the city is a member of the European Association of Historic Towns and Regions . Twin towns – sister cities Nyíregyháza, Hungary, since 1992 Cheboksary, Chuvashia, since 1999 Turkistan, Kazakhstan Hamm, Germany, since 2005 Peć, Kosovo, since 2008 Yunfu, China, since 2007 Latakia, Syria, since 2009 Notable natives Following list is alphabetically sorted after family name. Mihran Mesrobian (1889-1975), architect and decorated Ottoman soldier İlker Başbuğ (1943), former Chief of the General Staff of Turkey Ali Çetinkaya (1879-1949), Ottoman Army officer and Turkish politician Fikret Emek (1963), retired military personnel of the Special Forces Command Veysel Eroğlu (1948), Minister of Environment and Forestry Bülent İplikçioğlu (1952), historian Fazıl Şenel (1972), High Commissioner / Board Member of EMRA (EPDK), Ex-President of BOTAŞ Ahmed Karahisari (1468- 1566), Ottoman calligrapher Gülcan Mıngır (1989), European Champion Middle-distance runner Ahmet Necdet Sezer (1941), former President of Turkey Sibel Özkan Öz (1988), Olympic medalist female weightlifter Nurgül Yeşilçay (1976), actress See also 2012 Afyonkarahisar arsenal explosion References External links Afyon Karahisar City council website Governor's office Afyonkarahisar community and information Afyon Blog Afyonkarahisar City Daily Photo Afyon Guide and Photo Album Afyon and the Phrygians Afyon Kocatepe University Department of forestry and the environment Afyon Science High School Afyon Zafer College Populated places in Afyonkarahisar Province Afyonkarahisar Central District Districts of Afyonkarahisar Province Anatolia

2670

https://en.wikipedia.org/wiki/Abba%20Arikha

Abba Arikha

Abba Arikha (175–247 CE; Jewish Babylonian Aramaic: ; born: Rav Abba bar Aybo, ), commonly known as Rav (), was a Jewish amora of the 3rd century. He was born and lived in Kafri, Asoristan, in the Sasanian Empire. Abba Arikha established at Sura the systematic study of the rabbinic traditions, which, using the Mishnah as text, led to the compilation of the Talmud. With him began the long period of ascendancy of the great Talmudic Academies in Babylonia around the year 220. In the Talmud, he is frequently associated with Samuel of Nehardea, with whom he debated many issues. Biography His surname, Arikha (English: the Tall), he owed to his height, which exceeded that of his contemporaries. Others, reading Arekha, consider it an honorary title, "Lecturer". In the traditional literature he is referred to almost exclusively as Rav, "the Master", (both his contemporaries and posterity recognizing in him a master), just as his teacher, Judah HaNasi, was known simply as Rabbi. He is called Rabbi Abba only in the tannaitic literature, where a number of his sayings are preserved. He occupies a middle position between the Tannaim and the Amoraim, and is accorded the right, rarely conceded to one who is only an amora, of disputing the opinion of a tanna. Rav was a descendant of a distinguished Babylonian family which claimed to trace its origin to Shimei, brother of King David. His father, Aibo, was a brother of Hiyya the Great who lived in Palestine, and was a highly esteemed scholar in the collegiate circle of the patriarch Judah haNasi. From his associations in the house of his uncle, and later as his uncle's disciple and as a member of the academy at Sepphoris, Rav acquired such knowledge of the tradition as to make him its foremost exponent in Babylonia. While Judah haNasi was still living, Rav, having been ordained as teacher (with certain restrictions), returned to Babylonia, where he at once began a career that was destined to mark an epoch in the development of Babylonian Judaism. In the annals of the Babylonian schools, the year of his arrival is recorded as the starting-point in the chronology of the Talmudic age. It was the 530th year of the Seleucidan and the 219th year of the common era. As the scene of his activity, Rav first chose Nehardea, where the exilarch appointed him agoranomos, or market-master, and Rabbi Shela made him lecturer (amora) of his college. Then he moved to Sura, on the Euphrates, where he established a school of his own, which soon became the intellectual center of the Babylonian Jews. As a renowned teacher of the Law and with hosts of disciples, who came from all sections of the Jewish world, Rav lived and worked in Sura until his death. Samuel, another disciple of Judah haNasi, at the same time brought to the academy at Nehardea a high degree of prosperity; in fact, it was at the school of Rav that Jewish learning in Babylonia found its permanent home and center. Rav's activity made Babylonia independent of Palestine, and gave it that predominant position which it was destined to occupy for several centuries. Little is known of Rav's personal life. That he was rich seems probable; for he appears to have occupied himself for a time with commerce and afterward with agriculture. He is referred to as the son of noblemen, but it is not clear if this is an affectionate term or a true description of his status. Rashi does tell us that he is being described as the son of great men. He was highly respected by the Gentiles as well as by the Jews of Babylonia, as shown by the friendship which existed between him and the last Parthian king, Artaban. He was deeply affected by the death of Artaban (226) and the downfall of the Arsacid dynasty, and does not appear to have sought the friendship of Ardeshir, founder of the Sassanian dynasty, although Samuel of Nehardea probably did so. Rav became closely related, through the marriage of one of his daughters, to the family of the exilarch. Her sons, Mar Ukba and Nehemiah, were considered types of the highest aristocracy. Rav had many sons, several of whom are mentioned in the Talmud, the most distinguished being the eldest, Chiyya. Chiyya did not, however, succeed his father as head of the academy: this post fell to Rav's disciple Rav Huna. Two of his grandsons occupied in succession the office of exilarch. Rav died at an advanced age, deeply mourned by numerous disciples and the entire Babylonian Jewry, which he had raised from comparative insignificance to the leading position in Judaism. Legacy The method of treatment of the traditional material to which the Talmud owes its origin was established in Babylonia by Rav. That method takes the Mishnah of Judah haNasi as a text or foundation, adding to it the other tannaitic traditions, and deriving from all of them the theoretical explanations and practical applications of the religious Law. The legal and ritual opinions recorded in Rav's name and his disputes with Samuel constitute the main body of the Babylonian Talmud. His numerous disciples—some of whom were very influential and who, for the most part, were also disciples of Samuel—amplified and, in their capacity as instructors and by their discussions, continued the work of Rav. In the Babylonian schools, Rav was rightly referred to as "our great master." Rav also exercised a great influence for good upon the moral and religious conditions of his native land, not only indirectly through his disciples, but directly by reason of the strictness with which he repressed abuses in matters of marriage and divorce, and denounced ignorance and negligence in matters of ritual observance. Rav, says tradition, found an open, neglected field and fenced it in. Teachings He gave special attention to the liturgy of the synagogue. The Aleinu prayer first appeared in the manuscript of the Rosh Hashana liturgy by Rav. He included it in the Rosh Hashana mussaf service as a prologue to the Kingship portion of the Amidah. For that reason some attribute to Rav the authorship, or at least the revising, of Aleinu. In this noble prayer are evinced profound religious feeling and exalted thought, as well as ability to use the Hebrew language in a natural, expressive, and classical manner. The many homiletic and ethical sayings recorded of him show similar ability. The greatest aggadist among Babylonian Amoraim, he is the only one of them whose aggadic utterances approach in number and contents those of the Palestinian haggadists. The Jerusalem Talmud has preserved a large number of his halakhic and aggadic utterances; and the Palestinian Midrashim also contain many of his aggadot. Rav delivered homiletic discourses, both in the beit midrash and in the synagogues. He especially loved to discuss in his homilies the events and personages of Biblical history; and many beautiful and genuinely poetic embellishments of the Biblical record, which have become common possession of the aggadah, are his creations. His aggadah is particularly rich in thoughts concerning the moral life and the relations of human beings to one another. A few of these teachings may be quoted here: "The commandments of the Torah were only given to purify men's morals" "Whatever may not properly be done in public is forbidden even in the most secret chamber" "In the future, a person will give a judgement and accounting over everything that his eye saw and he did not eat." "Whoever lacks pity for his fellow man is no child of Abraham" "Better to cast oneself into a fiery furnace than to publicly shame one's fellow man." "One should never betroth himself to a woman without having seen her; one might subsequently discover in her a blemish because of which one might loathe her and thus transgress the commandment: 'Thou shalt love thy neighbor as thyself'" "A father should never prefer one child above another; the example of Joseph shows what evil consequences may result." "While the dates are still in the borders of your skirt, run off with them to the distillery!" [Meaning, before one wastes what he has, let him convert it into something more productive] "Receive the payment. Deliver the goods!" [i.e. do not sell on credit] "[Better to come] under the displeasure of Ishmael (i.e. the Arabs) than [the displeasure of] Rome; [better to come] under the displeasure of Rome than [the displeasure of] a Persian; [better to come] under the displeasure of a Persian than [the displeasure of] a disciple of the Sages; [better to come] under the displeasure of a disciple of the Sages than [the displeasure of] an orphan and widow." "A man ought always to occupy himself in the words of the Law, and in the commandments, even if it were not for their own sake. For eventually he will do it for their own sake" "A man ought always to look about in search of a [good] city whose settlement is only of late, considering that since its settlement is [relatively] new, its iniquities are also few." "A disciple of the Sages ought to have in him one-eighth of one-eighth of pride, [and no more]." Rav loved the Book of Ecclesiasticus (Sirach), and warned his disciple Hamnuna against unjustifiable asceticism by quoting its advice that considering the transitoriness of human life, one should not despise the good things of this world. To the celestial joys of the future he was accustomed to refer in the following poetic words: Rav also devoted much attention to mystical and transcendental speculations regarding Maaseh Bereshit, Maaseh Merkabah, and the Divine Name. Many of his important utterances testify to his tendency in this direction. References Citations Sources . 175 births 247 deaths Rabbis of Academy of Sura

2671

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

Abbahu

Rabbi Abbahu () was a Jew and Talmudist of the Talmudic Academies in Syria Palaestina from about 279-320 and is counted a member of the third generation of Amoraim. He is sometimes cited as Rabbi Abbahu of Kisrin (Caesarea). Biography His rabbinical education was acquired mainly at Tiberias in the academy presided over by Johanan bar Nappaha, with whom his relations were almost those of a son. He frequently made pilgrimages to Tiberias, even after he had become well known as rector of the Caesarean academy. Abbahu was an authority on weights and measures. He encouraged the study of Koine Greek by Jews. He learned Greek himself in order to become useful to his people, then under the Roman proconsuls, that language having become, to a considerable extent, the rival of Hebrew even in prayer. In spite of the bitter protest of Shimon bar Abba, he also taught his daughters Greek. Indeed, it was said of Abbahu that he was a living illustration of the biblical maxim, "It is good that you should take hold of this [the study of the Law]; yea, also from that [other branches of knowledge] withdraw not your hand: for he that fears God shall come forth of them all". Rector in Caesarea Being wise, handsome, and wealthy, Abbahu became not only popular with his coreligionists, but also influential with the proconsular government. On one occasion, when his senior colleagues, Hiyya bar Abba, Rabbi Ammi, and Rabbi Assi, had punished a certain woman, and feared the wrath of the proconsul, Abbahu was deputed to intercede for them. He had, however, anticipated the rabbis' request, and wrote them that he had appeased the informers but not the accuser. The witty enigmatic letter describing this incident, preserved in the Talmud, is in the main pure Hebrew, and even includes Hebrew translations of Greek proper names, to avoid the danger of possible exposure should the letter have fallen into the hands of enemies and informers. After his ordination he declined a teacher's position, recommending in his stead a more needy friend, Abba of Acre, as worthier than himself. He thereby illustrated his own doctrine that it is a divine virtue to sympathize with a friend in his troubles as well as to partake of his joys. Later he assumed the office of rector in Caesarea, the former seat of Hoshaiah Rabbah, and established himself at the so-called Kenishta Maradta (Insurrectionary Synagogue); from which some of the most prominent teachers of the next generation issued. In Caesarea he originated several ritual rules, one of which (that regulating the sounding of the shofar) has since been universally adopted, and is referred to by rishonim as "the Enactment of R. Abbahu". He did not confine his activity to Caesarea, but also visited and taught in many other Jewish towns. On these journeys, Abbahu gathered so many halakhot that scholars turned to him for information on mooted questions. In the course of these travels he made a point of complying with all local enactments, even where such compliance laid him open to the charge of inconsistency. On the other hand, where circumstances required it, he did not spare even the princes of his people. Where, however, the rigorous exposition of laws worked hardship on the masses, he did not scruple to modify the decisions of his colleagues for the benefit of the community. As for himself, he was very strict in the observance of the laws. Once he ordered some Samaritan wine, but subsequently hearing that the Samaritans no longer strict observed the dietary laws, with the assistance of his colleagues (Hiyya bar Abba, Rabbi Ammi, and Rabbi Assi) he investigated the report, and, ascertaining it to be well founded, ruled the Samaritans to be equivalent to Gentiles for all ritual purposes. Abbahu and Hiyya bar Abba Abbahu's chief characteristic seems to have been modesty. While lecturing in different towns, he met R. Hiyya bar Abba, who was lecturing on intricate halakhic themes. As Abbahu delivered popular sermons, the masses naturally crowded to hear him, and deserted the halakhist. At this apparent slight, Hiyya manifested chagrin, and Abbahu hastened to comfort him by comparing himself to the peddler of glittering fineries that always attracted the eyes of the masses, while his rival was a trader in precious stones, the virtues and values of which were appreciated only by the connoisseur. This speech not having the desired effect, R. Abbahu showed special respect for his slighted colleague by following him for the remainder of that day. "What," said Abbahu, "is my modesty as compared with that of Abba of Acre, who does not even remonstrate with his interpreter for interpolating his own comments in the lecturer's expositions." When his wife reported to him that his interpreter's wife had boasted of her own husband's greatness, Abbahu simply said, "What difference does it make which of us is really the greater, so long as through both of us heaven is glorified?" His principle of life he expressed in the maxim, "Let man ever be of the persecuted, and not of the persecutors; for there are none among the birds more persecuted than turtle-doves and pigeons, and the Scriptures declare them worthy of the altar." Later years Abbahu had two sons, Zeira and Hanina. Some writers ascribe to him a third son, Abimi. Abbahu sent Hanina to the academy at Tiberias, where he himself had studied, but the youth occupied himself with the burial of the dead, and on hearing of this, the father sent him a reproachful message in this laconic style: "Is it because there are no graves in Caesarea that I have sent you off to Tiberias? Study must precede practice". Abbahu left behind him a number of disciples, the most prominent among whom were the leaders of the 4th amoraic generation, R. Jonah and R. Jose. At Abbahu's death the mourning was so great that it was said, "Even the statues of Caesarea shed tears". Against the Christians R. Abbahu, although eminent as a halakhist, was more distinguished as an aggadist and controversialist. He had many interesting disputes with the Christians of his day. Sometimes these disputes were of a humorous nature. Thus, a heretic bearing the name of Sason (=Joy) once remarked to him, "In the next world your people will have to draw water for me; for thus it is written in the Bible, 'With joy shall ye draw water.'" To this R. Abbahu replied, "Had the Bible said 'for joy' [le-sason], it would mean as you say, but since it says 'with joy' [be-sason], it means that we shall make bottles of your skin and fill them with water". These controversies, although forced on him, provoked resentment, and it is even related that his physician, Jacob the Schismatic (Minaah), was slowly poisoning him, but Rabbi Ammi and Rabbi Assi discovered the crime in time. A Christian (Minaah) once asked Abbahu "When does your Messiah come?" in a tone of mockery. Abbahu replied: "When you will be wrapped in darkness, for it says, 'Behold, darkness shall cover the earth, and gross darkness the nations; then shall the Lord rise upon you and His glory shall be seen on you'." A Christian came to Abbahu with the quibbling question: "How could your God in His priestly holiness bury Moses without providing for purificatory rites, yet oceans are declared insufficient?" Abbahu replied: "Does it not say, 'The Lord comes with fire'? Fire is the true element of purification, according to Numbers 31:23." Another question of the same character: "Why the boastful claim, 'What nation on earth is like Your people Israel', since we read, 'All the nations are as nothing before Him'?" Abbahu replied: "Do we not read of Israel, he 'shall not be reckoned among the nations'?" Abbahu made a notable exception with reference to the Tosefta's statement that the Gilyonim (Gospels) and other books of the heretics (Minnin) are not to be saved from a fire on Shabbat: "the books of those [written by Minnin for the purpose of debating with Jews] at Abidan may or may not be saved." In regard to the line "Barukh Shem Kevod Malkhuto" (Blessed be the Name of His glorious Kingdom) recited after the Shema, Abbahu says that in Palestine, where the Christians look for points of controversy, the words should be recited aloud (lest the Jews be accused of silently tampering with the unity of God proclaimed in the Shema), whereas in the Babylonian city of Nehardea, where there are no Christians, the words are recited with a low voice. Preaching directly against the Christian dogma, Abbahu says: "A king of flesh and blood may have a father, a brother, or a son to share in or dispute his sovereignty, but the Lord says, 'I am the Lord your God! I am the first - that is, I have no father; and I am the last - that is, I have no brother; and besides me there is no God - that is, I have no son'". His comment on Numbers 23:19 has a still more polemical tone: "God is not a man that he should lie; neither the son of man, that he should repent; if a man says: 'I am God,' he is a liar; if he says: 'I am a son of man,' he will have cause to regret it; and if he says, 'I will go up to heaven,' he has said [something] but will not keep his word". Some of his controversies on Christian theological subjects, as on Adam, on Enoch, and on the resurrection, are less clear and direct. Other Abbahus There are several other Abbahus mentioned in the Talmudim and Midrashim, prominent among whom is Abbahu (Abuha, Aibut) b. Ihi (Ittai), a Babylonian halakhist, contemporary of Samuel and Anan, and brother of Minyamin (Benjamin) bar Ihi. While this Abbahu repeatedly applied to Samuel for information, Samuel in return learned many halakhot from him. References It has the following bibliography: Grätz, Gesch. d. Juden, 2d ed., iv. 304, 307–317; Jost, Gesch. des Judenthums und seiner Sekten, ii.161-164; Frankel, Mebo, pp. 58a-60; Weiss, Dor, iii. 103–105; Bacher, Ag. Pal. Amor. ii. 88–142. 3rd-century births 4th-century deaths 3rd-century rabbis 4th-century rabbis 3rd-century Romans 4th-century Romans Talmud rabbis of the Land of Israel People from Caesarea, Israel Year of birth unknown Year of death unknown

2673

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

Abbreviator

An Abbreviator (plural "Abbreviators" in English and "Abbreviatores" in Latin) or Breviator was a writer of the Papal Chancery who adumbrated and prepared in correct form Papal bulls, briefs, and consistorial decrees before these were written out in extenso by the scriptores. They are first mentioned in the Papal bull Extravagantes of Pope John XXII and in a Papal bull of Pope Benedict XII. After the protonotaries left the adumbration of the minutes to the Abbreviators, those de Parco majori of the dignity of prelate were the most important officers of the Papal Chancery. By the pontificate of Pope Martin V their signature was essential to the validity of the acts of the Chancery. Over time they obtained many important privileges. Roman lay origin Abbreviators make an abridgment or abstract of a long writing or discourse by contracting the parts, i. e., the words and sentences; an abbreviated form of writing common among the ancient Romans. Abbreviations were of two kinds: the use of a single letter for a single word and the use of a sign, note, or mark for a word or phrase. The Emperor Justinian forbade the use of abbreviations in the compilation of the Digest and afterward extended his prohibition to all other writings. This prohibition was not universally obeyed. The Abbreviators found it convenient to use the abbreviated form, and this was especially the case in Rome. The early Christians practised the abbreviated mode, no doubt as an easy and safe way of communicating with one another and safeguarding their secrets from enemies and false brethren. Ecclesiastical abbreviatores In course of time the Papal Chancery adopted this mode of writing as the "curial" style, still further abridging by omitting the diphthongs "ae" and "oe", and likewise all lines and marks of punctuation. The Abbreviatores were officials of the Roman Curia. The scope of its labour, as well as the number of its officials, varied over time. Up to the twelfth or thirteenth century, the duty of the Apostolic – or Roman – Chancery was to prepare and expedite the Papal letters and writs for collation of ecclesiastical dignitaries and other matters of grave importance which were discussed and decided in Papal consistory. About the thirteenth or fourteenth century, the Popes, then residing in Avignon, France, began to reserve the collation of a great many benefices, so that all the benefices, especially the greater ones, were to be conferred through the Roman Curia (Lega, Praelectiones Jur. Can., 1, 2, 287). As a consequence, the labour was immensely augmented, and the number of Abbreviatores necessarily increased. To regulate the proper expedition of these reserved benefices, Pope John XXII instituted the rules of chancery to determine the competency and mode of procedure of the Chancery. Afterwards the establishment of the Dataria Apostolica and the Secretariate of Briefs lightened the work of the Chancery and led to a reduction in the number of Abbreviatores. According to Ciampini (Lib. de abbreviatorum de parco majore etc., Cap. 1) the institution of curial abbreviators was very ancient, succeeding after the persecutions to the notaries who recorded the acts of the martyrs. Other authors reject this early institution and ascribe it to Pope John XXII in 1316. It is certain that he uses the name "abbreviatores", but speaks as if they had existed before his time, and had, by over-taxation of their labour, caused much complaint and protest. He (Extravag. Joan., Tit. 13, "Cum ad Sacrosanctae Romanae Ecclesiae") prescribed their work, determined how much they could charge for their labour, fixed a certain tax for an abstract or abridgment of twenty-five words or their equivalent at 150 letters, forbade them to charge more, even though the abstract was over twenty-five words but less than fifty words, enacted that the basis of the tax was the labour employed in writing, expediting, etc. the bulls, and by no means the emoluments that accrued to the recipient of the favour or benefice conferred by the bull, and declared that whoever charged more than the tax fixed by him was suspended for six months from office, and upon a second violation of the law, was deprived of it altogether, and if the delinquent was an abbreviator, he was excommunicated. Should a large letter have to be rewritten, owing to the inexact copy of the abbreviator, the abbreviator and not the receiver of the bull had to pay the extra charge for the extra labour to the Apostolic writer. Whatever may be the date of the institution of the office of abbreviator, it is certain that it became of greater importance and more highly privileged upon its erection into a college of prelates. Pope Martin V (Constit. 3 "In Apostolicae", 2 and 5) fixed the manner for their examination and approbation and also the tax they could demand for their labour and the punishment for overcharge. He also assigned to them certain remunerations. The Abbreviators of the lower, or lesser, were to be promoted to the higher, or greater, bar or presidency. Their offices were compatible with other offices, i. e. they could hold two benefices or offices simultaneously, some conferred by the Cardinal Vice Chancellor, others by the Pope. Institution of the College of Abbreviators In the pontificate of Pope Pius II, their number, which had been fixed at twenty-four, had overgrown to such an extent as to diminish considerably the individual remuneration, and, as a consequence, competent men no longer sought the office, and hence the old style of writing and expediting the bulls was no longer used, to the great injury of justice, the interested parties, and the dignity of the Apostolic See. To remedy this and to restore the old established chancery style, the Pope selected out of the many then living Abbreviators seventy, and formed them into a college of prelates denominated the "College of Abbreviators", and decreed that their office should be perpetual, that certain remunerations should be attached to it, and granted certain privileges to the possessors of the same. He ordained further that some should be called "Abbreviators of the Upper Bar" (Abbreviatores de Parco Majori; the name derived from a place in the Chancery that was surrounded by a grating, in which the officials sat, which is called higher or lower (major or minor) according to the proximity of the seats to that of the Vice Chancellor), the others of the Lower Bar (Abbreviatores de Parco Minori); that the former should sit upon a slightly raised portion of the chamber, separated from the rest of the chamber by lattice work, assist the Cardinal Vice-Chancellor, subscribe the letters and have the principal part in examining, revising, and expediting the Apostolic letters to be issued with the leaden seal; that the latter, however, should sit among the Apostolic writers upon benches in the lower part of the chamber, and their duty was to carry the signed schedules or supplications to the prelates of the Upper Bar. Then one of the prelates of the Upper Bar made an abstract, and another prelate of the same bar revised it. Prelates of the Upper Bar formed a quasi-tribunal, in which as a college they decided all doubts that might arise about the form and quality of the letters, of the clauses and decrees to be adjoined to the Apostolic letters, and sometimes about the payment of the remunerations and other contingencies. Their opinion about questions concerning Chancery business was held in the highest estimation by all the Roman tribunals. Pope Paul II suppressed the college; but Pope Sixtus IV (Constitutio 16, "Divina") re-instituted it. He appointed seventy-two abbreviators, of whom twelve were of the upper, or greater, and twenty-two of the lower, or lesser, presidency ("parco"), and thirty-eight examiners on first appearance of letters. They were bound to be in attendance on certain days under penalty of fine, and sign letters and diplomas. Ciampini mentions a decree of the Vice Chancellor by which absentees were mulcted in the loss of their share of the remuneration of the following session of the Chancery. The same Pope also granted many privileges to the College of Abbreviators, but especially to the members of the greater presidency. Pope Pius VII suppressed many of the offices of the Chancery, and so the Tribunal of Correctors and the Abbreviators of the lower presidency disappeared. Of the Tribunal of Correctors, a substitute-corrector alone remains. Bouix (Curia Romana, edit. 1859) chronicled the suppression of the lower presidency and put the number of Abbreviators at that date at eleven. Later the College consisted of seventeen prelates, six substitutes, and one sub-substitute, all of whom, except the prelates, were clerics or laity. Although the duty of Abbreviators was originally to make abstracts and abridgments of the Apostolic letters, diplomas, et cetera, using the legal abbreviations, clauses, and formularies, in course of time, as their office grew in importance they delegated that part of their office to their substitute and confined themselves to overseeing the proper expedition of the Apostolic letters. Prior to 1878, all Apostolic letters and briefs requiring for their validity the leaden seal were engrossed upon rough parchment in Gothic characters or round letters, also called "Gallicum" and commonly "Bollatico", but in Italy "Teutonic", without lines, diphthongs, or marks of punctuation. Bulls engrossed on a different parchment, or in different characters with lines and punctuation marks, or without the accustomed abbreviations, clauses, and formularies, were rejected as spurious. Pope Leo XIII in his Constitutio Universae Eccles. of 29 December 1878 ordained that they should be written henceforth in ordinary Latin characters upon ordinary parchment and that no abbreviations were to be used except those easily understood. Titles and privileges Many great privileges were conferred upon Abbreviators. By decree of Pope Leo X they were elevated as Papal nobles, ranking as Comes palatinus ("Count Palatine"), familiars and members of the Papal household, so that they might enjoy all the privileges of domestic prelates and of prelates in actual attendance on the Pope, as regards plurality of benefices as well as expectatives. They and their clerics and their properties were exempt from all jurisdiction except the immediate jurisdiction of the Pope, and they were not subject to the judgments of the Auditor of Causes or the Cardinal Vicar. He also empowered them to confer, later within strict limitations, the degree of Doctor, with all university privileges, institute notaries (later abrogated), legitimize children so as to make them eligible to receive benefices vacated by their fathers (later revoked), also to ennoble three persons and to make Knights of the Order of St. Sylvester (Militiae Aureae), the same to enjoy and to wear the insignia of nobility. Pope Gregory XVI rescinded this privilege and reserved to the Pope the right of institution of such knights (Acta Pont. Greg. XVI, Vol. 3, 178-179-180). Pope Paul V, who in early manhood was a member of the college (Const. 2, "Romani"), made them Referendaries of Favours, and after three years of service, Referendaries of Justice, enjoying the privileges of Referendaries and permitting one to assist in the signatures before the Pope, giving all a right to a portion in the Papal palace and exempting them from the registration of favours as required by Pope Pius IV (Const., 98) with regard to matters pertaining to the Apostolic Chamber. They followed immediately after the twelve voting members of the Signature in capella. Abbreviators of the greater presidency were permitted to wear the purple cassock and cappa, as also rochet in capella. Abbreviators of the lower presidency before their suppression were simple clerics, and according to permission granted by Pope Sixtus IV (loc. cit.) might be even married. These offices becoming vacant by death of the Abbreviator, no matter where the death occurred, were reserved to the Roman Curia. The prelates could resign their office in favour of others. Formerly these offices as well as those of the other Chancery officers from the Regent down were occasions of venality, until Popes, especially Pope Benedict XIV and Pope Pius VII, gradually abolished that. Pope Leo XIII in a motu proprio of 4 July 1898 most solemnly decreed the abolition of all venality in the transfer or collation of the said offices. As domestic prelates, prelates of the Roman Curia, they had personal preeminence in every diocese of the world. They were addressed as "Reverendissimus", "Right Reverend", and "Monsignor". As prelates, and therefore possessing the legal dignity, they were competent to receive and execute Papal commands. Pope Benedict XIV (Const. 3, "Maximo") granted prelates of the greater presidency the privilege of wearing a hat with a purple band, which right they held even after they ceased to be abbreviators. Suppression Pope Pius X abrogated the College in 1908 and their obligations were transferred to the protonotarii apostolici participantes. References Catholic ecclesiastical titles

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https://en.wikipedia.org/wiki/Abd%20al-Latif%20al-Baghdadi

Abd al-Latif al-Baghdadi

ʿAbd al-Laṭīf al-Baghdādī (, 1162 Baghdad–1231 Baghdad), short for Muwaffaq al-Dīn Muḥammad ʿAbd al-Laṭīf ibn Yūsuf al-Baghdādī (), was a physician, philosopher, historian, Arabic grammarian and traveller, and one of the most voluminous writers of his time. Biography Many details of ʿAbd al-Laṭīf al-Baghdādī's life are known from his autobiography as presented in Ibn Abī Uṣaybiʿah's literary history of medicine. As a young man, he studied grammar, law, tradition, medicine, alchemy and philosophy. He focused his studies on ancient authors, in particular Aristotle, after first adopting Avicenna (Ibn Sīnā) as his philosophical mentor at the suggestion of a wandering scholar from the Maghreb. He travelled extensively and resided in Mosul (in 1189) where he studied the works of al-Suhrawardi before travelling on to Damascus (1190) and the camp of Saladin outside Acre (1191). It was at this last location that he met Baha al-Din ibn Shaddad and Imad al-Din al-Isfahani and acquired the Qadi al-Fadil's patronage. He went on to Cairo, where he met Abu'l-Qasim al-Shari'i, who introduced him to the works of al-Farabi, Alexander of Aphrodisias, and Themistius and (according to al-Latif) turned him away from Avicenna and alchemy. In 1192 he met Saladin in Jerusalem and enjoyed his patronage, then went to Damascus again before returning to Cairo. He journeyed to Jerusalem and to Damascus in 1207-8, and eventually made his way via Aleppo to Erzindjan, where he remained at the court of the Mengujekid Ala’-al-Din Da’ud (Dāwūd Shāh) until the city was conquered by the Rūm Seljuk ruler Kayqubād II (Kayqubād Ibn Kaykhusraw). ‘Abd al-Latif returned to Baghdad in 1229, travelling back via Erzerum, Kamakh, Divriği and Malatya. He died in Baghdad two years later. Account of Egypt ʿAbd al-Laṭīf was a man of great knowledge and of an inquisitive and penetrating mind. Of the numerous works (mostly on medicine) which Ibn Abī Uṣaybiʿah ascribes to him, one only, his graphic and detailed Account of Egypt (in two parts), appeared to be known in Europe. Archeology ʿAbd-al-Laṭīf was well aware of the value of ancient monuments. He praised Muslim rulers for preserving and protecting pre-Islamic artefacts and monuments, but he also criticized them for failing to do this. He noted that the preservation of antiquities presented a number of benefits for Muslims: "monuments are useful historical evidence for chronologies"; "they furnish evidence for Holy Scriptures, since the Qur'an mentions them and their people"; "they are reminders of human endurance and fate"; "they show, to a degree, the politics and history of ancestors, the richness of their sciences, and the genius of their thought". While discussing the profession of treasure hunting, he notes that poorer treasure hunters were often sponsored by rich businessmen to go on archeological expeditions. In some cases, an expedition could turn out to be fraudulent, with the treasure hunter disappearing with large amounts of money extracted from sponsors. Egyptology His manuscript was one of the earliest works on Egyptology. It contains a vivid description of a famine caused by the Nile failing to overflow its banks (which occurred during the author's residence in Egypt). He also wrote detailed descriptions on ancient Egyptian monuments. Autopsy Al-Baghdādī wrote that during the famine in Egypt in 597 AH (1200 AD), he had the opportunity to observe and examine a large number of skeletons, through which he came to the view that Galen was incorrect regarding the formation of the bones of the lower jaw [mandible], coccyx and sacrum. Translation Al-Baghdādī's Arabic manuscript was discovered in 1665 by the English orientalist Edward Pococke and is preserved in the Bodleian Library. Pococke published the Arabic manuscript in the 1680s. His son, Edward Pococke the Younger, translated the work into Latin, although he was only able to publish less than half of his work. Thomas Hunt attempted to publish Pococke's complete translation in 1746, although his attempt was unsuccessful. Pococke's complete Latin translation was eventually published by Joseph White of Oxford in 1800. The work was then translated into French, with valuable notes, by Silvestre de Sacy in 1810. Philosophy As far as philosophy is concerned, one may adduce that ʿAbd al-Laṭīf al-Baghdādī regarded philosophers as paragons of real virtue and therefore he refused to accept as a true philosopher one lacking not only true insight, but also a truly moral personality as true philosophy was in the service of religion, verifying both belief and action. Apart from this he regarded the philosophers’ ambitions as vain (Endress, in Martini Bonadeo, Philosophical journey, xi). ʿAbd al-Laṭīf composed several philosophical works, among which is an important and original commentary on Aristotle's Metaphysics (Kitāb fī ʿilm mā baʿd al-ṭabīʿa). This is a critical work in the process of the Arabic assimilation of Greek thought, demonstrating its author's acquaintance with the most important Greek metaphysical doctrines, as set out in the writings of al-Kindī (d. circa 185-252/801-66) and al-Fārābī (d. 339/950). The philosophical section of his Book of the Two Pieces of Advice (Kitāb al-Naṣīḥatayn) contains an interesting and challenging defence of philosophy and illustrates the vibrancy of philosophical debate in the Islamic colleges. It moreover emphasises the idea that Islamic philosophy did not decline after the twelfth century CE (Martini Bonadeo, Philosophical journey; Gutas). ʿAbd al-Laṭīf al-Baghdādī may therefore well be an exponent of what Gutas calls the “golden age of Arabic philosophy” (Gutas, 20). Alchemy ʿAbd al-Laṭīf also penned two passionate and somewhat grotesque pamphlets against the art of alchemy in all its facets. Although he engaged in alchemy for a short while, he later abandoned the art completely by rejecting not only its practice, but also its theory. In ʿAbd al-Laṭīf's view alchemy could not be placed in the system of the sciences, and its false presumptions and pretensions must be distinguished from true scientific knowledge, which can be given a rational basis (Joosse, Rebellious intellectual, 29–62; Joosse, Unmasking the craft, 301–17; Martini Bonadeo, Philosophical journey, 5-6 and 203–5; Stern, 66–7; Allemann). Spiritualism During the years following the First World War, ʿAbd al-Laṭīf al-Baghdādī's name reappeared within the spiritualistic movement in the United Kingdom. He was introduced to the public by the Irish medium Eileen J. Garrett, the author Sir Arthur Conan Doyle and the spiritualist R.H. Saunders and became known by the name Abduhl Latif, the great Arab physician. He is said to have acted as a control of mediums until the mid 1960s (Joosse, Geest, 221–9). The Bodleian Library (MS Pococke 230) and the interpretation of the Videans (Zand-Videan, 8–9) may also have prompted the whimsical short-story ‘Ghost Writer’, as told to Tim Mackintosh-Smith, in which ʿAbd al-Laṭīf al-Baghdādī speaks in the first person. References Bibliography Allemann, Franz, ʿAbdallaṭīf al-Baġdādī: Risālah fī Mudjādalat al-ḥakīmain al-kīmiyāʾī wan-naẓarī (“Das Streitgespräch zwischen dem Alchemisten und dem theoretischen Philosophen” or The Argument Between the Alchemist and the Theoretical Philosopher). Eine textkritische Bearbeitung der Handschrift: Bursa, Hüseyin Çelebi 823, fol. 100-123 mit Übersetzung und Kommentar, PhD dissertation Bern 1988. Degen, Rainer, Zum Diabetestraktat des ʿAbd al-Laṭīf al-Baġdādī, Annali Istituto Universitario Orientale di Napoli, 37 (N.S. 27) (1977), 455–62. Dietrich, Albert, Ein Arzneimittelverzeichnis des Abdallaṭīf Ibn Yūsuf al-Baġdādī, in: Wilhelm Hoenerbach, Der Orient in der Forschung. Festschrift für Otto Spies zum 5. April 1966 (Wiesbaden 1967), 42–60. Gannagé, Emma, “Médecine et philosophie à Damas à l’aube du XIIIème siècle: un tournant post-avicennien?”, Oriens, 39 (2011), 227–256. Gutas, Dimitri, 'Philosophy in the Twelfth Century: One View from Bagdad, or the Reputation of al-Ghazālī, in: Peter Adamson, In the Age of Averroes: Arabic Philosophy in the Sixth/Twelfth Century, London/Torino: Nino Aragno Editore, 2011, 9-26. Ibn Abī Uṣaybiʿa, ʿUyūn al-anbāʾ fī ṭabaqāt al-atibbāʾ, ed. Imruʾulqais ibn aṭ-Ṭaḥḥān (August Müller), 2 vols. (Cairo-Königsberg 1299/1882), 2: 201-13 [Reprint by Fuat Sezgin et al.: Islamic Medicine 1–2, 2 vols., Frankfurt am Main 1995]. The entry on ALB has been translated, annotated, and edited by N. Peter Joosse and Geert Jan van Gelder, in: A Literary History of medicine: The ʿUyūn al-anbāʾ fī ṭabaqāt al-aṭibbāʾ of Ibn Abī Uṣaybiʿah, HdO 134, volume 3-1 [ed.]: 1295–1323; 3-2 [trl.]: 1470-1506 (Brill: Leiden/Boston, 2019). Joosse, N. Peter, art. "ʿAbd al-Laṭīf al-Baghdādī" in: Encyclopaedia of Islam Three. Joosse, N. Peter, The Physician as a Rebellious Intellectual. The Book of the Two Pieces of Advice or Kitāb al-Naṣīḥatayn by ʿAbd al-Laṭīf al-Baghdādī (1162-1231): Introduction, Edition and Translation of the Medical Section (Frankfurt am Main and Bern: Peter Lang Edition 2014). [Beihefte zur Mediaevistik, Band 18]. Joosse, N. Peter, ʿAbd al-Laṭīf al-Baghdādī as a philosopher and a physician. Myth or reality, topos or truth?, in Peter Adamson, In the age of Averroes. Arabic philosophy in the sixth/twelfth century (Nino Aragno Editore: London/Torino 2011), 27-43. Joosse, N. Peter, ‘Pride and prejudice, praise and blame’. ʿAbd al-Laṭīf al-Baghdādī’s views on good and bad medical practitioners, in Arnoud Vrolijk and Jan P. Hogendijk, O ye gentlemen. Arabic studies on science and literary culture in honour of Remke Kruk (Brill: Leiden/Boston 2007), 129–41. Joosse, N. Peter, 'ʿUnmasking the Craftʾ. ʿAbd al-Laṭīf al-Baghdādī's Views on Alchemy and Alchemists: in: Anna A. Akasoy and Wim Raven, Islamic Thought in the Middle Ages. Studies in Text, Transmission and Translation in Honour of Hans Daiber (Brill: Leiden/Boston, 2008), 301–17. Joosse, N. Peter, ‘De geest is uit de fles’. De middeleeuwse Arabische arts ʿAbd al-Laṭīf ibn Yūsuf al-Baghdādī: zijn medische werk en zijn bizarre affiliatie met het twintigste-eeuwse spiritisme, Gewina 30/4 (2007), 211–29. Joosse, N. Peter and Peter E. Pormann, 'Decline and Decadence in Iraq and Syria after the Age of Avicenna?: ʿAbd al-Laṭīf al-Baghdādī (1162-1231) between Myth and History, in: Bulletin of the History of Medicine 84 (2010), 1-29. Joosse, N. Peter and Peter E. Pormann, ʿAbd al-Laṭīf al-Baġdādī's commentary on Hippocrates’ ‘Prognostic’. A preliminary exploration, in Peter E. Pormann (ed.), >Epidemics< in context. Greek commentaries on Hippocrates in the Arabic tradition (De Gruyter: Berlin and Boston 2012), 251–83. Joosse, N. Peter and Peter E. Pormann, Archery, mathematics, and conceptualising inaccuracies in medicine in 13th century Iraq and Syria, Journal of the Royal Society of Medicine 101 (2008), 425–7. Karimullah, Kamran I., « Assessing Avicenna's (d. 428/1037) Medical Influence in Prolegomena to Post-Classical (1100‒1900 CE) Medical Commentaries », MIDÉO, 32 ( 2017), 93-134 (especially section I on ʿAbd al-Laṭīf al-Baghdādī). Kruk, Remke, ʿAbd al-Laṭīf al-Baghdādī's Kitāb al-Ḥayawān: A chimaera?, in: Anna A. Akasoy and Wim Raven, Islamic thought in the middle ages. Studies in text, transmission and translation, in honour of Hans Daiber (Leiden and Boston 2008), 345–62. Mackintosh-Smith, Tim, ‘Ghost Writer’, as told to Tim Mackintosh-Smith, (Slightly foxed Ltd: London, 2005). Martini Bonadeo, Cecilia, art. "‘Abd al-Latif al-Baghdadi", in The Stanford Encyclopedia of Philosophy (Fall 2015 Edition), in Edward N. Zalta (ed.), URL = <http://plato.stanford.edu/archives/fall2015/entries/al-baghdadi/>. Pormann, Peter E. and N. Peter Joosse, Commentaries on the Hippocratic Aphorisms in the Arabic tradition: The example of melancholy, in Peter E. Pormann (ed.), >Epidemics< in context. Greek commentaries on Hippocrates in the Arabic tradition (De Gruyter: Berlin and Boston 2012), 211–49. Pormann, Peter E. and Emilie Savage-Smith, Medieval Islamic medicine (Edinburgh University Press: Edinburgh 2007), 60, 73–4. Stern, Samuel Miklos, A collection of treatises by ʿAbd al-Laṭīf al-Baghdādī, Islamic Studies 1 (1962), 53–70. [Reprint, in Fritz W. Zimmermann (ed.), S.M. Stern, Medieval Arabic and Hebrew thought (London 1983), No. XVIII]. Thies, Hans-Jürgen, Der Diabetestraktat ʿAbd al-Laṭīf al-Baġdādī's. Untersuchungen zur Geschichte des Krankheitbildes in der arabischen Medizin, Diss. Bonn, Selbstverlag Uni Bonn, 1971. Toorawa, Shawkat M., A portrait of ʿAbd al-Laṭīf al-Baghdādī's education and instruction, in Joseph E. Lowry, Devin J. Stewart and Shawkat M. Toorawa, Law and education in medieval Islam. Studies in memory of professor George Makdisi (Oxford 2004), 91-109. Ullmann, Manfred, Die Medizin im Islam (Brill: Leiden/Köln 1970), 170–2. Ullmann, Manfred, review of Hans-Jürgen Thies, Der Diabetestraktat ʿAbd al-Laṭīf al-Baġdādī's. Untersuchungen zur Geschichte des Krankheitsbildes in der arabischen Medizin, (Selbstverlag Uni Bonn: Bonn 1971), Der Islam 48 (1972), 339–40. Zand, K.H. and J.A. and I.E. Videan, Kitāb al-Ifāda wa l-iʿtibār fī l-umūr al-mushāhada wa l-ḥawādith al-muʿāyana bi-arḍ miṣr''. Facsimile edition of the autograph manuscript at the Bodleian Library, Oxford and English translation by Kamal Hafuth Zand and John A. and Ivy E. Videan under the name The Eastern Key (London and Cairo 1204/1964). 1162 births 1231 deaths Writers from Baghdad 12th-century people of the Abbasid Caliphate Medieval Iraqi physicians Egyptologists Medieval Arab physicians Physicians of medieval Islam 13th-century physicians Medieval travel writers 13th-century people of the Abbasid Caliphate 12th-century jurists 13th-century jurists 12th-century Arabs 13th-century Arabs

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https://en.wikipedia.org/wiki/Abd%20al-Rahman%20I

Abd al-Rahman I

Abd al-Rahman I ibn Mu’awiya (in full: Abd al-Rahman ibn Mu'awiya ibn Hisham ibn Abd al-Malik ibn Marwan; 731-788; Arabic: عبد الرحمن الأول) was the founder of the Umayyad Arab dynasty that ruled the greater part of Iberia for nearly three centuries (including the succeeding Caliphate of Córdoba). Abd al-Rahman was a member of the Umayyad dynasty in Damascus, and his establishment of a government in Iberia represented a break with the Abbasids, who had overthrown the Umayyads in Damascus in 750. He was also known by the surnames al-Dakhil ("the Entrant"), Saqr Quraish ("the Falcon of Quraysh") and as “the Falcon of Andalusia". Variations of the spelling of his name include Abd ar-Rahman, Abdul Rahman I, Abdar Rahman, and Abderraman. Biography Flight from Damascus Abd al-Rahman was born in Palmyra, near Damascus in the heartland of the Umayyad Caliphate, the son of the Umayyad prince Mu'awiya ibn Hisham and his concubine Ra'ha, a Berber woman from the Nafza tribe, and thus the grandson of Hisham ibn Abd al-Malik, caliph from 724 to 743.<ref>Arnold Joseph Toynbee, A study of history, Oxford University Press, H. Milford, 1934, Volume 8, p. 372</ref> He was twenty when his family, the ruling Umayyads, were overthrown by the Abbasid Revolution in 748–750. Abd al-Rahman and a small part of his family fled Damascus, where the center of Umayyad power had been; people moving with him included his brother Yahya, his four-year-old son Sulayman, and some of his sisters, as well as his Greek mawla (freedman or client), Bedr. The family fled from Damascus to the River Euphrates. All along the way the path was filled with danger, as the Abbasids had dispatched horsemen across the region to try to find the Umayyad prince and kill him. The Abbasids were merciless with all Umayyads that they found. Abbasid agents closed in on Abd al-Rahman and his family while they were hiding in a small village. He left his young son with his sisters and fled with Yahya. Accounts vary, but Bedr likely escaped with Abd ar-Rahman. Some histories indicate that Bedr met up with Abd al-Rahman at a later date. Abd al-Rahman, Yahya, and Bedr quit the village, narrowly escaping the Abbasid assassins. On the way south, Abbasid horsemen again caught up with the trio. Abd al-Rahman and his companions then threw themselves into the River Euphrates. The horsemen urged them to return, promising that no harm would come to them; and Yahya, perhaps from fear of drowning, turned back. The 17th-century historian Ahmed Mohammed al-Maqqari poignantly described Abd al-Rahman's reaction as he implored Yahya to keep going: "O brother! Come to me, come to me!" Yahya returned to the near shore, and was quickly dispatched by the horsemen. They cut off his head and left his body to rot. Al-Maqqari quotes earlier historians reporting that Abd al-Rahman was so overcome with fear that from the far shore he ran until exhaustion overcame him. Only he and Bedr were left to face the unknown. Exile years After barely escaping with their lives, Abd al-Rahman and Bedr continued south through Palestine, the Sinai, and then into Egypt. Abd al-Rahman had to keep a low profile as he traveled. It may be assumed that he intended to go at least as far as northwestern Africa (Maghreb), the land of his mother, which had been partly conquered by his Umayyad predecessors. The journey across Egypt would prove perilous. At the time, Abd al-Rahman ibn Habib al-Fihri was the semi-autonomous governor of Ifriqiya (roughly, modern Tunisia) and a former Umayyad vassal. The ambitious Ibn Habib, a member of the illustrious Fihrid family, had long sought to carve out Ifriqiya as a private dominion for himself. At first, he sought an understanding with the Abbasids, but when they refused his terms and demanded his submission, Ibn Habib broke openly with the Abbasids and invited the remnants of the Umayyad dynasty to take refuge in his dominions. Abd al-Rahman was only one of several surviving Umayyad family members to make their way to Ifriqiya at this time. But Ibn Habib soon changed his mind. He feared the presence of prominent Umayyad exiles in Ifriqiya, a family more illustrious than his own, might become a focal point for intrigue among local nobles against his own usurped powers. Around 755, believing he had discovered plots involving some of the more prominent Umayyad exiles in Kairouan, Ibn Habib turned against them. At the time, Abd al-Rahman and Bedr were keeping a low profile, staying in Kabylie, at the camp of a Nafza Berber chieftain friendly to their plight. Ibn Habib dispatched spies to look for the Umayyad prince. When Ibn Habib's soldiers entered the camp, the Berber chieftain's wife Tekfah hid Abd al-Rahman under her personal belongings to help him go unnoticed. Once they were gone, Abd al-Rahman and Bedr immediately set off westwards. In 755, Abd al-Rahman and Bedr reached modern-day Morocco near Ceuta. Their next step would be to cross the sea to al-Andalus, where Abd al-Rahman could not have been sure whether or not he would be welcomed. Following the Berber Revolt of the 740s, the province was in a state of confusion, with the Muslim community torn by tribal dissensions among the Arabs (the Qays–Yemeni feud) and racial tensions between the Arabs and Berbers. At that moment, the nominal ruler of al-Andalus, emir Yusuf ibn Abd al-Rahman al-Fihri—another member of the Fihrid family and a favorite of the old Arab settlers (baladiyun), mostly of south Arabian or "Yemeni" tribal stock—was locked in a contest with his vizier (and son-in-law) al-Sumayl ibn Hatim al-Kilabi, the head of the "Syrians"—the shamiyun, drawn from the junds or military regiments of Syria, mostly of north Arabian Qaysid tribes—who had arrived in 742. Among the Syrian junds were contingents of old Umayyad clients, numbering perhaps 500, and Abd al-Rahman believed he might tug on old loyalties and get them to receive him. Bedr was dispatched across the straits to make contact. Bedr managed to line up three Syrian commanders—Ubayd Allah ibn Uthman and Abd Allah ibn Khalid, both originally of Damascus, and Yusuf ibn Bukht of Qinnasrin. The trio approached the Syrian arch-commander al-Sumayl (then in Zaragoza) to get his consent, but al-Sumayl refused, fearing Abd al-Rahman would try to make himself emir. As a result, Bedr and the Umayyad clients sent out feelers to their rivals, the Yemenite commanders. Although the Yemenites were not natural allies (the Umayyads are a Qaysid tribe), their interest was piqued. The emir Yusuf al-Fihri had proven himself unable to keep the powerful al-Sumayl in check and several Yemenite chieftains felt their future prospects were poor, whether in a Fihrid or Syrian-dominated Spain, so that they had a better chance of advancement if they hitched themselves to the glitter of the Umayyad name. Although the Umayyads did not have a historical presence in the region (no member of the Umayyad family was known to have ever set foot in al-Andalus before) and there were grave concerns about young Abd al-Rahman's inexperience, several of the lower-ranking Yemenite commanders felt they had little to lose and much to gain, and agreed to support the prince. Bedr returned to Africa to tell Abd al-Rahman of the invitation of the Umayyad clients in al-Andalus. Shortly thereafter, they set off with a small group of followers for Europe. When some local Berber tribesmen learned of Abd al-Rahman's intent to set sail for al-Andalus, they quickly rode to catch up with him on the coast. The tribesmen might have figured that they could hold Abd al-Rahman as hostage, and force him to buy his way out of Africa. He did indeed hand over some amount of dinars to the suddenly hostile local Berbers. Just as Abd al-Rahman launched his boat, another group of Berbers arrived. They also tried to obtain a fee from him for leaving. One of the Berbers held on to Abd al-Rahman's vessel as it made for al-Andalus, and allegedly had his hand cut off by one of the boat's crew. Abd al-Rahman landed at Almuñécar in al-Andalus, to the east of Málaga, in September 755; however, his landing site was unconfirmed. Fight for power Upon landing in al-Andalus, Abd al-Rahman was greeted by clients Abu Uthman and Ibn Khalid and an escort of 300 cavalry. During his brief time in Málaga, he was able to amass local support quickly. Waves of people made their way to Málaga to pay respect to the prince they thought was dead, including many of the aforementioned Syrians. One famous story that persisted through history related to a gift Abd al-Rahman was given while in Málaga. The gift was a beautiful young slave girl, but Abd al-Rahman humbly returned her to her previous master. News of the prince's arrival spread like wildfire throughout the peninsula. During this time, emir al-Fihri and the Syrian commander al-Sumayl pondered what to do about the new threat to their shaky hold on power. They decided to try to marry Abd al-Rahman into their family. If that did not work, then Abd al-Rahman would have to be killed. Abd al-Rahman was apparently sagacious enough to expect such a plot. In order to help speed his ascension to power, he was prepared to take advantage of the feuds and dissensions. However, before anything could be done, trouble broke out in northern al-Andalus. Zaragoza, an important trade city on the Upper March of al-Andalus, made a bid for autonomy. Al-Fihri and al-Sumayl rode north to quash the rebellion. This might have been fortunate timing for Abd al-Rahman, since he was still getting a solid foothold in al-Andalus. By March 756, Abd al-Rahman and his growing following of Umayyad clients and Yemenite junds, were able to take Sevilla without violence. He managed to break the rebellion attempt in Zaragoza, but just about that time the Cordovan governor received news of a Basque rebellion in Pamplona. An important detachment was sent by Yusuf ibn 'Abd al-Rahman to quash it, but his troops were annihilated. After the setback, al-Fihri turned his army back south to face the "pretender". The fight for the right to rule al-Andalus was about to begin. The two contingents met on opposite sides of the River Guadalquivir, just outside the capital of Córdoba on the plains of Musarah. The river was, for the first time in years, overflowing its banks, heralding the end of a long drought. Nevertheless, food was still scarce, and Abd al-Rahman's army suffered from hunger. In an attempt to demoralize Abd al-Rahman's troops, al-Fihri ensured that his troops not only were well fed, but also ate gluttonous amounts of food in full view of the Umayyad lines. An attempt at negotiations soon followed in which it is likely that Abd al-Rahman was offered the hand of al-Fihri's daughter in marriage and great wealth. Abd al-Rahman, however, would settle for nothing less than control of the emirate, and an impasse was reached. Even before the fight began, dissension spread through some of Abd al-Rahman's lines. Specifically, the Yemeni Arabs were unhappy that the prince was mounted on a fine Spanish steed and that his mettle was untried in battle. The Yemenis observed significantly that such a fine horse would provide an excellent mount to escape from battle. Being the ever-wary politician, Abd al-Rahman acted quickly to regain Yemeni support, and rode to a Yemeni chief who was mounted on a mule named "Lightning". Abd al-Rahman averred that his horse proved difficult to ride and was wont to buck him out of the saddle. He offered to exchange his horse for the mule, a deal to which the surprised chief readily agreed. The swap quelled the simmering Yemeni rebellion. Soon both armies were in their lines on the same bank of the Guadalquivir. Abd al-Rahman had no banner, and so one was improvised by unwinding a green turban and binding it round the head of a spear. Subsequently, the turban and the spear became the banner and symbol of the Andalusian Umayyads. Abd al-Rahman led the charge toward al-Fihri's army. Al-Sumayl in turn advanced his cavalry out to meet the Umayyad threat. After a long and difficult fight "Abd ar-Rahman obtained a most complete victory, and the field was strewn with the bodies of the enemy.". Both al-Fihri and al-Sumayl managed to escape the field (probably) with parts of the army too. Abd al-Rahman triumphantly marched into the capital, Córdoba. Danger was not far behind, as al-Fihri planned a counterattack. He reorganized his forces and set out for the capital Abd al-Rahman had usurped from him. Again Abd al-Rahman met al-Fihri with his army; this time negotiations were successful, although the terms were somewhat changed. In exchange for al-Fihri's life and wealth, he would be a prisoner and not allowed to leave the city limits of Córdoba. Al-Fihri would have to report once a day to Abd al-Rahman, as well as turn over some of his sons and daughters as hostages. For a while al-Fihri met the obligations of the one-sided truce, but he still had many people loyal to him--people who would have liked to see him back in power. Al-Fihri eventually did make another bid for power. He quit Córdoba and quickly started gathering supporters. While at large, al-Fihri managed to gather an army allegedly numbering 20,000. It is doubtful, however, that his troops were "regular" soldiers, but rather a hodge-podge of men from various parts of al-Andalus. Abd al-Rahman's appointed governor in Sevilla took up the chase, and after a series of small fights, managed to defeat al-Fihri's army. Al-Fihri himself managed to escape to the former Visigoth capital of Toledo in central al-Andalus; once there, he was promptly killed. Al-Fihri's head was sent to Córdoba, where Abd al-Rahman had it nailed to a bridge. With this act, Abd al-Rahman proclaimed himself the emir of al-Andalus. However, in order to take over southern Iberia, al-Fihri's general, al-Sumayl, had to be dealt with, and he was garroted in Córdoba's jail. Still, most of central and northern al-Andalus (Toledo, Zaragoza, Barcelona, etc.) was out of his rule, with large swathes remaining in the hands of Yusuf ibn 'Abd al-Rahman al-Fihri's supporters until 779 (submission of Zaragoza). Rule It is unclear whether Abd al-Rahman proclaimed himself caliph. There are documents in the archives of Cordoba that state that this was his first act upon entering the city. He himself believed he was destined to be Caliph because of prophesies he had heard as a boy, so it seems likely he would. However, historically he is recorded as Emir and not Caliph. Abd al-Rahman's 7th descendant, Abd al-Rahman III, would, however, take up the title of caliph. In the meantime, a call went out through the Muslim world that al-Andalus was a safe haven for friends of the house of Umayya, if not for Abd al-Rahman's scattered family that managed to evade the Abbasids. Abd al-Rahman probably was quite happy to see his call answered by waves of Umayyad faithful and family. He was finally reacquainted with his son Sulayman, whom he last saw weeping on the banks of the Euphrates with his sisters. Abd ar-Rahman's sisters were unable to make the long voyage to al-Andalus. Abd al-Rahman placed his family members in high offices across the land, as he felt he could trust them more than non-family. The Umayyad family would again grow large and prosperous over successive generations. One of these kinsmen, Abd al-Malik ibn Umar ibn Marwan, persuaded Abd al-Rahman in 757 to drop the name of the Abbasid caliph from the Friday prayers (a traditional recognition of sovereignty in medieval Islam), and became one of his top generals and his governor in Seville. By 763 Abd ar-Rahman had to get back to the business of war. Al-Andalus had been invaded by an Abbasid army. Far away in Baghdad, the current Abbasid caliph, al-Mansur, had long been planning to depose the Umayyad who dared to call himself emir of al-Andalus. Al-Mansur installed al-Ala ibn-Mugith as governor of Africa (whose title gave him dominion over the province of al-Andalus). It was al-Ala who headed the Abbasid army that landed in al-Andalus, possibly near Beja (in modern-day Portugal). Much of the surrounding area of Beja capitulated to al-Ala, and in fact rallied under the Abbasid banners against Abd al-Rahman. Abd al-Rahman had to act quickly. The Abbasid contingent was vastly superior in size, said to have numbered 7,000 men. The emir quickly made for the redoubt of Carmona with his army. The Abbasid army was fast on their heels, and laid siege to Carmona for approximately two months. Abd al-Rahman must have sensed that time was against him as food and water became scarce, and his troops morale likely came into question. Finally Abd al-Rahman gathered his men as he was "resolved on an audacious sally". Abd al-Rahman hand-picked 700 fighters from his army and led them to Carmona's main gate. There, he started a great fire and threw his scabbard into the flames. Abd al-Rahman told his men that time had come to go down fighting rather than die of hunger. The gate lifted and Abd ar-Rahman's men fell upon the unsuspecting Abbasids, thoroughly routing them. Most of the Abbasid army was killed. The heads of the main Abbasid leaders were cut off, preserved in salt, identifying tags pinned to their ears, and then bundled together in a gruesome package and sent to the Abbasid caliph, who was on pilgrimage at Mecca. Upon receiving the evidence of al-Ala's defeat in al-Andalus, al-Mansur is said to have gasped, "God be praised for placing a sea between us!" Al-Mansur hated, and yet apparently respected Abd al-Rahman to such a degree that he dubbed him the "Hawk of Quraysh" (the Umayyads were from a branch of the Quraysh tribe). Despite such a tremendous victory, Abd al-Rahman had to continuously put down rebellions in al-Andalus. Various Arab and Berber tribes fought each other for varying degrees of power, some cities tried to break away and form their own state, and even members of Abd al-Rahman's family tried to wrest power from him. During a large revolt, dissidents marched on Córdoba itself; However, Abd al-Rahman always managed to stay one step ahead, and crushed all opposition; as he always dealt severely with dissidents in al-Andalus. However, this assumption needs to be put in perspective, since in 756 he held a limited number of southern strongholds and faced resistance from other towns short of outright revolt during the next 25 years. Despite all this turmoil in al-Andalus, Abd al-Rahman wanted to take the fight back east to Baghdad. Revenge for the massacre of his family at the hands of the Abbasids must surely have been the driving factor in Abd al-Rahman's war plans. However, his war against Baghdad was put on hold by more internal problems. The city of Zaragoza on the Upper March remained out of reach of the Umayyad leader since the time of Yusuf ibn 'Abd al-Rahman al-Fihri, bidding for autonomy. Little could Abd al-Rahman have known that, as he set off to settle matters in that northern city, his hopes of waging war against Baghdad would be indefinitely put on hold. Problems in the Upper March Zaragoza proved to be a most difficult city to reign over for not only Abd ar-Rahman, but his successors as well. In the year 777–778, several notable men including Sulayman ibn Yokdan al-Arabi al-Kelbi, the self-appointed governor of Zaragoza, met with delegates of the leader of the Franks, Charlemagne. "[Charlemagne's] army was enlisted to help the Muslim governors of Barcelona and Zaragoza against the Umayyad [emir] in Cordoba...." Essentially Charlemagne was being hired as a mercenary, even though he likely had other plans of acquiring the area for his own empire. After Charlemagne's columns arrived at the gates of Zaragoza, Sulayman got cold feet and refused to let the Franks into the city, after his subordinate, al-Husayn ibn Yahiya, had successfully defeated and captured Abd al-Rahman's most trusted general, Thalaba Ibn Ubayd. It is possible that he realized that Charlemagne would want to usurp power from him. After capturing Sulayman, Charlemagne's force eventually headed back to France via a narrow pass in the Pyrenees, where his rearguard was wiped out by Basque and Gascon rebels (this disaster inspired the epic Chanson de Roland). Charlemagne was also attacked by Sulayman's relatives, who had freed Sulayman. Now Abd al-Rahman could deal with Sulayman and the city of Zaragoza without having to fight a massive Christian army. In 779 Abd al-Rahman offered Husayn, one of Sulayman's allies, the job of Zaragoza's governorship. The temptation was too much for al-Husayn, who murdered his colleague Sulayman. As promised, al-Husayn was awarded Zaragoza with the expectation that he would always be a subordinate of Córdoba. However, within two years al-Husayn broke off relations with Abd al-Rahman and announced that Zaragoza would be an independent city-state. Once again Abd al-Rahman had to be concerned with developments in the Upper March. He was intent on keeping this important northern border city within the Umayyad fold. By 783 Abd al-Rahman's army advanced on Zaragoza. It appeared as though Abd al-Rahman wanted to make clear to this troublesome city that independence was out of the question. Included in the arsenal of Abd al-Rahman's army were thirty-six siege engines. Zaragoza's famous white granite defensive walls were breached under a torrent of ordnance from the Umayyad lines. Abd al-Rahman's warriors spilled into the city's streets, quickly thwarting al-Husayn's desires for independence. Legacy and death Social dynamics and construction works After the aforementioned period of conflict, Abd al-Rahman continued in his improvement of al-Andalus' infrastructure. He ensured roadways were begun, aqueducts were constructed or improved, and that a new mosque was well funded in his capital at Córdoba. Construction on what would in time become the world-famous Great Mosque of Córdoba was started circa the year 786. Abd al-Rahman knew that one of his sons would one day inherit the rule of al-Andalus, but that it was a land torn by strife. In order to successfully rule in such a situation, Abd al-Rahman needed to create a reliable civil service and organize a standing army. He felt that he could not always rely on the local populace in providing a loyal army; and therefore bought a massive standing army consisting mainly of Berbers from North Africa as well as slaves from other areas. The total number of soldiers under his command was nearly 40,000. As was common during the years of Islamic expansion from Arabia, religious tolerance was practiced. Abd al-Rahman continued to allow Jews and Christians and other monotheistic religions to retain and practice their faiths, in exchange for a tribute tax. Abd al-Rahman's policy of taxing non-Muslims, often continued by later rulers, changed the religious dynamic of al-Andalus. Possibly because of excessive tribute taxes, "the bulk of the country's population must have become Muslim". However, other scholars have argued that though 80% of al-Andalus converted to Islam, it did not truly occur until near the 10th century. Christians more often converted to Islam than Jews although there were converted Jews among the new followers of Islam. There was a great deal of freedom of interaction among the groups: for example, Sarah, the granddaughter of the Visigoth king Wittiza, married a Muslim man and bore two sons who were later counted among the ranks of the highest Arab nobility. Abd al-Rahman I was able to forge a new Umayyad dynasty by standing successfully against Charlemagne, the Abbasids, the Berbers, and other Muslim Spaniards. His legacy started a new chapter for the Umayyad Dynasty ensuring their survival and culminating in the new Umayyad Caliphate of Cordoba by his descendants. Death Abd al-Rahman died c. 788 in his adopted city of Córdoba, and was supposedly buried under the site of the Mezquita. Abd al-Rahman's alleged favorite son was his choice for successor, and would later be known as Hisham I. Abd ar-Rahman's progeny would continue to rule al-Andalus in the name of the house of Umayyad for several generations, with the zenith of their power coming during the reign of Abd al-Rahman III. Family Abd al-Rahman was the son of Mu'awiya, son of Hisham, son of Abd al-Malik, according to Abd el-Wahid Merrakechi when reciting his ancestry. Abd al-Rahman's mother was a member of the Nafza Berbers with whom he found refuge after the murder of his family in 750. Abd al-Rahman married a Spanish woman named Hulal. She is said to be the mother of Hisham. Abd al-Rahman was the father of several sons, but the identity of their mother(s) is not clear: Sulayman (745–800), Governor of Toledo. Exiled after he refused to accept his brother Hisham's accession to the throne. Returned to challenge his nephew in 796, captured and executed in 800. Omar (died before 758), captured in battle and executed by Fruela I of Asturias. Hisham I (757–17 Apr 796), Emir of Cordoba. Abdallah Legends In his lifetime, Abd al-Rahman was known as al Dakhil ("the Entrant"), but he was also known as Saqr Quraish ("The Falcon of the Quraish"), bestowed on him by one of his greatest enemies, the Abbasid caliph al-Mansur. According to the chroniclers, al-Mansur once asked his courtiers who deserved the exalted title of "Falcon of the Quraysh" (Saqr Quraish'', foremost of the Prophet's tribe). The obsequious courtiers naturally replied "You, O Commander of the Faithful!", but the Caliph said no. Then they suggested Mu'awiya (founder of the Umayyad Caliphate), but the Caliph again said no. Then they suggested Abd al-Malik ibn Marwan (one of the greatest of the Umayyad caliphs), but again no. Then who, they asked, and al-Mansur replied: See also Timeline of the Muslim presence in the Iberian peninsula Abbasid Revolution al-Andalus Caliphate of Córdoba Abd al-Malik ibn Umar Further reading Maria Rosa Menocal, The Ornament of the World: How Muslims, Jews and Christians Created a Culture of Tolerance in Medieval Spain (2002) Andrea Pancini, L'immigrante (2016) References External links Emirs of Córdoba 731 births 788 deaths 8th-century Arabs 8th-century rulers in Europe Date of birth unknown Date of death unknown

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Abd al-Rahman II

Abd ar-Rahman II () (792–852) was the fourth Umayyad Emir of Córdoba in the Al-Andalus Iberia from 822 until his death. Abd ar-Rahman II was born in Toledo, the son of Emir Al-Hakam I. In his youth he took part in the so-called "massacre of the ditch", when from 700 to 5,000 people came to pay homage to the princes who were killed by order of Al-Hakam. He succeeded his father as Emir of Córdoba in 822 and engaged in nearly continuous warfare against Alfonso II of Asturias, whose southward advance he halted (822–842). In 825, he had a new city, Murcia, built, and proceeded to settle it with Arab loyalists to ensure stability. In 835, he confronted rebellious citizens of Mérida by having a large internal fortress built; again in 837, he suppressed a revolt of Christians and Jews in Toledo via the same measures. He issued a decree by which the Christians were forbidden to seek martyrdom, and he had a Christian synod held to forbid martyrdom. In 839 or 840, he sent an embassy under al-Ghazal to Constantinople to sign a pact with the Byzantine Empire against the Abbasids. In 844, Abd ar-Rahman repulsed an assault by Vikings who had disembarked in Cádiz, conquered Seville (with the exception of its citadel) and attacked Córdoba itself. Thereafter he constructed a fleet and naval arsenal at Seville to repel future raids. He may have sent al-Ghazal on a second embassy to the Vikings in Ireland after this. He responded to William of Septimania's requests of assistance in his struggle against Charles the Bald's nominations. Abd ar-Rahman was famous for his public building program in Córdoba where he died in 852. He made additions to the Mosque–Cathedral of Córdoba. A vigorous and effective frontier warrior, he was also well known as a patron of the arts. He was also involved in the execution of the "Martyrs of Córdoba", and was a patron of the great composer Ziryab. References Emirs of Córdoba 792 births 852 deaths People from Toledo, Spain 9th-century rulers in Europe 8th-century Arabs 9th-century Arabs

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Abd al-Rahman III

ʿAbd al-Rahmān ibn Muḥammad ibn ʿAbd Allāh ibn Muḥammad ibn ʿAbd al-Raḥmān ibn al-Ḥakam al-Rabdī ibn Hishām ibn ʿAbd al-Raḥmān al-Dākhil () or ʿAbd al-Rahmān III (890 - 961), was the Umayyad Emir of Córdoba from 912 to 929, at which point he founded the Caliphate of Córdoba, serving as its first caliph until his death. Abd al-Rahman won the laqab (sobriquet) ( in his early 20s when he supported the Maghrawa Berbers in North Africa against Fatimid expansion and rose to the Caliphate. Life Early years Lineage and appearance Abd al-Rahman was born in Córdoba, on 18 December 890. His year of birth is also given as 889 and 891. He was the grandson of Abdullah ibn Muhammad al-Umawi, seventh independent Umayyad emir of al-Andalus. His parents were Abdullah's son Muhammad and Muzna (or Muzayna), a Christian concubine. His paternal grandmother was also a Christian, the royal infanta Onneca Fortúnez, daughter of the captive king Fortún Garcés of Pamplona. Abd al-Rahman was thus nephew in the half-blood of queen Toda of Pamplona. He is described as having "white skin, blue eyes and attractive face; good looking, although somewhat sturdy and stout. His legs were short, to the point that the stirrups of his saddle were mounted just one palm under it. When mounted, he looked tall, but on his feet he was quite short. He dyed his beard black." His natural hair was described as being reddish-blond, and apparently wished to avoid looking like a Visigoth (from many European concubines in his ancestry), desiring to look more like an Umayyad Arab. Harem youth Muhammad was assassinated by his brother Al-Mutarrif, who had allegedly grown jealous of the favour Muhammad had gained in the eyes of their father Abdallah. Al-Mutarrif had accused Muhammad of plotting with the rebel Umar ibn Hafsun, and Muhammad had been imprisoned. According to some sources, the emir himself was behind Muhammad's fall, as well as Al-Mutarrif's death in 895. Abd al-Rahman spent his youth in his mother's harem. Al-Mutarrif's sister, known as al-Sayyida ("the Lady"), was entrusted with his education. She made sure that Abd al-Rahman's education was conducted with some rigor. He also was claimed to have learned and known the local Mozarabic language. Accession to throne Emir Abdallah died at the age of 72. Despite the fact that four of his sons (Aban, Abd al Rahman, Muhammad and Ahmad) were alive at the time of his death, all of them were passed over for succession. Abdallah instead chose as his successor his grandson, Abd al-Rahman III (the son of his first son). This came as no surprise, since Abdallah had already demonstrated his affection for his grandson in many ways, namely by allowing him to live in his own tower (something he did not allow for any of his sons), and allowing him to sit on the throne on some festive occasions. Most importantly Abdallah gave Abd al-Rahman his ring, the symbol of power, when Abdallah fell ill prior to his death. Abd al-Rahman succeeded Abdallah the day after his death, 16 October 912. Historiographers of the time, such as Al-Bayan al-Mughrib and the Crónica anónima de Abd al-Rahman III, state that his succession was "without incident". At the time, Abd al-Rahman was about 21 or 22 years old. He inherited an emirate on the verge of dissolution, his power extending not far beyond the vicinity of Córdoba. To the north, the Christian Kingdom of Asturias was continuing its program of Reconquista in the Douro valley. To the south in Ifriqiya, the Fatimids had created an independent caliphate that threatened to attract the allegiance of the Muslim population, who had suffered under the harsh rule of Abdullah. On the internal front the discontented Muwallad families (Muslims of Iberian origin) represented a constant danger for the Córdoban emir. The most powerful of the latter was Umar ibn Hafsun, who, from his impregnable fortress of Bobastro, controlled much of eastern Al-Andalus. From the very early stages of his reign, Abd al-Rahman showed a firm resolve to quash the rebels of al-Andalus, consolidate centralized power, and reestablish internal order within the emirate. Within 10 days of taking the throne, he exhibited the head of a rebel leader in Cordoba. From this point on he led annual expeditions against the northern and southern tribes to maintain control over them. To accomplish his aims he introduced into the court the saqalibah, slaves of East European origin. The saqalibah represented a third ethnic group that could neutralize the endless strife between his subjects of Muslim Arab heritage, and those of Muslim Berber heritage. Hasdai ibn Shaprut, a Jewish courtier of the king's court who served as financier to the king, wrote of the king's revenues on this wise: Early rule During the first 20 years of his rule, Abd al-Rahman avoided military action against the northern Christian kingdoms, Asturias and the Kingdom of Navarre. The Muwallad rebels were the first problem he confronted. Those powerful families were supported by Iberians who were openly or secretly Christians and had acted with the rebels. These elements, which formed the bulk of the population, were not averse to supporting a strong ruler who would protect them against the Arab aristocracy. Abd al-Rahman moved to subdue them by means of a mercenary army that included Christians. He first had to suppress the rebel Umar ibn Hafsun. On 1 January 913 an army, led by the eunuch Badr, conquered the fortress of Écija, at some from the capital. All the city's fortifications were destroyed, aside from the citadel, which was left as residence of the governor and a garrison for the emiral troops. In the following spring, after sixty-five days of meticulous preparations, Abd al-Rahman personally led an expedition to the south of his realm. His troops were able to recover the coras (provinces) of Jaén and Granada, while a cavalry detachment was sent to free Málaga from ibn Hafsun's siege. He also obtained the capitulation of Fiñana (in the modern province of Almería), after setting fire to its suburbs. Subsequently, he moved against the castle of Juviles in the Alpujarras. After devastating its countryside to deprive it of any resource, he encircled it. Finding it difficult to bombard with catapults, he ordered the construction of a platform where his siege engines could be mounted to greater effect, and cut the water supply. The Muwallad defenders surrendered after a few days: their lives, apart from fifty-five die-hards who were beheaded, were spared in exchange for their allegiance to the emir. The campaign continued in a similar vein, lasting for a total of ninety days. Abd al-Rahman forced the defeated Muwallad to send hostages and treasures to Córdoba, in order to secure their continued submission. In the first year of his reign, Abd al-Rahman took advantage of the rivalries between the Banu Hajjaj lords of Seville and Carmona to force them to submit. He initially sent a special corps (hasam) under Ahmad ibn Muhammad ibn Hudayr, governor of Écija, to Seville, to obtain their submission. This attempt failed, but gained him the support of Muhammad ibn Ibrahim ibn Hayyay, lord of Carmona, and a cousin of the Sevillan lord, Ahmad ibn Maslama. When the latter was surrounded by Umayyad troops, he sued for help to Ibn Hafsun, but the latter was defeated by the besiegers and returned to Bobastro. He next went after the forts in the provinces of Elvira, Granada, and Jaén, all of which were either directly or indirectly controlled by Hafsun. Seville finally capitulated on 20 December 913. Ibn al-Mundhir al-Qurays, a member of the royal family, was named governor of the city, while the Lord of Carmona obtained the title of vizier. Muhammad ibn Ibrahim enjoyed his office for only a single day, for Abd al-Rahman soon discovered his collusion with the rebel governor of Carmona. Muhammad was sent to prison, where he later met his death. The region of Valencia submitted peacefully in 915. Ibn Hafsun and other rebels Abd al-Rahman's next objective was to quash the longstanding rebellion of Umar ibn Hafsun. His troops left Córdoba on 7 May 914 and, after a few days, encamped before the walls of Balda (identified with today's Cuevas de San Marcos). His cavalry ravaged the nearby woods and the countryside, while the rest of the troops moved to Turrus, a castle located in the present municipality of Algarinejo, which was surrounded within five days, while its environs were also devastated. The Umayyad army then moved to the citadel of ʿUmar ibn Hafsun, while the cavalry was sent to the castle of Sant Batir, which was abandoned by the defenders, allowing Abd al-Rahman's troops to secure a large booty. Then it was the turn of the castles of Olías and Reina. The latter fell after a violent fight, leaving the road open to the major city and provincial capital of Málaga, which he captured after one day. Abd al-Rahman then turned and followed the coast by Montemayor, near Benahavís, Suhayl (Fuengirola) and another castle called Turrus or Turrus Jusayn (identified by Évariste Lévi-Provençal as Ojén). He finally arrived at Algeciras on 1 June 914. He ordered a patrol of the coast to destroy the boats that supplied the citadel of Umar ibn Hafsun from the Maghreb. Many of them were captured and set afire in front of the emir. The rebellious castles near Algeciras surrendered as soon as the Cordoban army manifested itself. Abd al-Rahman launched three different campaigns against Ibn Hafsun (who died in 917) and his sons. Among them, Jaʿfar ibn Hafsun held the stronghold of Toledo. Abd al-Rahman ravaged the countryside around the city. Jafar, after two years of siege, escaped the city to ask for help in the northern Christian kingdoms. In the meantime Abd al-Rahman obtained the surrender of the city from its population, after promising them immunity, although 4,000 rebels escaped in a night sally. The city surrendered on 2 August 932, after a siege of two years. In 921 the Banu Muhallab of Guadix submitted, followed by those of Jerez de la Frontera and Cádiz, as well as the trading republic of Pechina (922). In 927, Abd al-Rahman also launched a campaign against the rebel Banu Qasi, but was forced to break it off by the intervention of Jimeno Garcés of Pamplona. The last of the sons of Ibn Hafsun to fall was Hafs, who commanded his powerful fortress of Umar ibn Hafsun. Surrounded by Abd al-Rahman's vizier, Said ibn al-Mundhir, who had ordered the construction of bastions around the city, he resisted the siege for six months, until he surrendered in 928 and had his life spared. The Levente and Algarve rebels The continued expeditions against the Hafsunids did not distract Abd al-Rahman III from the situation of other regions in al-Andalus, which recognized him only nominally, if not being in open revolt. Most of the loyal governors of the cities were in a weak position, such as the governor of Évora, who could not prevent the attack of the king of Galicia (future king of León), Ordoño II, who captured the city in the summer of 913, taking back a sizable booty and 4,000 prisoners and massacring many Muslims. In much of the eastern and western provinces, Abd al-Rahman's authority was completely unrecognized. The lord of Badajoz, Abd Allah ibn Muhammad, grandson of Abd al-Rahman ibn Marwan al-Yilliqi, not only fortified his city against a possible attack from Ordoño, but also acted in complete independence from Córdoba. To avoid the fall of Évora into the hands of the Berber groups of the region, he ordered the destruction of its defensive towers and lowered the walls, though a year later he decided to reconstruct it, giving its control to his ally Masud ibn Sa' dun al-Surunbaqi. The Algarve was dominated completely by a muladí coalition led by Saʿid ibn Mal, who had expelled the Arabs from Beja, and the lords of Ocsónoba, Yahya ibn Bakr, and of Niebla, Ibn Ufayr. Alcácer do Sal and Lisbon were under control of the Banu Dānis. The absence of royal authority enabled Ordoño II to easily campaign in this area, his main objective being the city of Mérida, in the summer of 915. Abd al-Rahman III did not send an army and only several local Berber jefes offered some resistance which was ineffective. Assumption of the Caliphate In the next year, despite having defeated only some of the rebels, Abd al-Rahman III considered himself powerful enough to declare himself Caliph of Córdoba (16 January 929), effectively breaking his allegiance to, and ties with, the Fatimid and Abbasid caliphs. The caliphate was thought only to belong to the Emperor who ruled over the sacred cities of Mecca and Medina, and his ancestors had until then been content with the title of emir. But the force of this tradition had weakened over time; and the title increased Abd al-Rahman's prestige with his subjects, both in Iberia and Africa. He based his claim to the caliphate on his Umayyad ancestors who had held undisputed control of the caliphate until they were overthrown by the Abbasids. Abd al-Rahman's move made him both the political and the religious leader of all the Muslims in al-Andalus, as well as the protector of his Christian and Jewish subjects. The symbols of his new caliphal power were a scepter (jayzuran) and the throne (sarir). In the mint he had founded in November 928, Abd al-Rahman started to mint gold dinars and silver dirhams, replacing the "al-Andalus" title with his name. In his new role as caliph, he achieved the surrender of Ibn Marwan of Badajoz in 930 as well as the surrender of the Banu Dānis of Alcácer do Sal. On the southern front, to counter the increasing Fatimid power in North Africa, abd al-Rahmad ordered the construction of a fleet based in Almeria. The caliph helped the Maghrawa Berbers conquer Melilla (927), Ceuta (931) and Tangiers (951), which accepted his suzerainty. However, he was unable to defeat Jawhar al-Siqilli of the Fatimids. In 951 he signed a peace with the new king of León, Ordoño III, in order to have a free hand against the Fatimids whose ships were harassing caliphal shipping in the Mediterranean and had even launched an assault against Almeria. Abd al-Rahman's force, led by prime minister Ahmad ibn Said, besieged the Fatimid port of Tunis, which bought its safety by paying a huge sum. In the end he was able to create a protectorate covering the northern and central Maghreb, supporting the Idrisid dynasty; the Caliphate's influence in the area disappeared after a Fatimid offensive in 958, after which abd al-Rahman kept only the strongholds of Ceuta and Tangiers. War with the Christian kingdoms of the north Even before al-Andalus was firmly under his rule, he had restarted the war against King Ordoño II of León, who had taken advantage of the previous troublesome situation to capture some boundary areas and menace the Umayyad territory. In 917 the then emir had sent a large army under his general Ahmad ibn Abi Abda against León, but this force was destroyed at the Battle of San Esteban de Gormaz in September of that year. Recognizing he had underestimated the power of Ordoño II, in 920 Abd al-Rahman mustered another powerful army to reclaim the territories lost after the previous campaign. He captured the forts of Osma and San Esteban de Gormaz. After defeating King Sancho Garcés I of Navarre and the king of León at Valdejunquera on 26 July, he penetrated into Navarre, overcoming Aragon by the classic route of the invasions from the south. Abd al-Rahman reached the Basque city of Pamplona, which was sacked and its cathedral church demolished. In 924 Abd al-Rahman felt obliged to avenge the massacre of Viguera castle perpetrated by King Sancho Ordóñez of Navarre one year earlier. He launched a counter offensive against Sancho in which Abd al-Rahman devastated a large area of Basque territory. The succession crisis which struck León after Ordoño II's death in the same year caused hostilities to cease until Ramiro II obtained the throne in 932; a first attempt by him to assist the besieged rebels in Toledo was repelled in 932, despite the Christian king capturing Madrid and scoring a victory at Osma. In 934, after reasserting supremacy over Pamplona and Álava, Abd al-Rahmad forced Ramiro to retreat to Burgos, and forced the Navarrese queen Toda, his aunt, to submit to him as a vassal and withdraw from direct rule as regent for her son García Sánchez I. In 937 Abd al-Rahman conquered some thirty castles in León. Next he turned to Muhammad ibn Hashim al-Tugib, governor of Zaragoza, who had allied with Ramiro but was pardoned after the capture of his city. Despite early defeats, Ramiro and García were able to crush the caliphal army in 939 at the Battle of Simancas, and almost kill Abd al-Rahman, due to treason by Arab elements in the caliph's army. After this defeat, Abd al-Rahman stopped taking personal command of his military campaigns. His cause was helped, however, by Fernán González of Castile, one of the Christian leaders at Simancas, who subsequently launched a sustained rebellion against Ramiro. The victory of Simancas enabled the Christian kingdom to maintain the military initiative in the peninsula until the defeat of Ramiro's successor, Ordoño III of León, in 956. However, they did not press this advantage as civil war broke out in the Christian territories. In 950 Abd al-Rahman received in Córdoba an embassy from count Borrell II of Barcelona, by which the northern county recognized caliphal supremacy in exchange for peace and mutual support. In 958, Sancho, the exiled king of León, King García Sánchez of Pamplona, and his mother Queen Toda all paid homage to Abd al-Rahman in Córdoba. Until 961, the caliphate played an active role in the dynastic strife characterizing the Christian kingdoms during the period. Ordoño III's half-brother and successor, Sancho the Fat, had been deposed by his cousin Ordoño IV. Together with his grandmother Toda of Pamplona, Sancho sought an alliance with Córdoba. In exchange for some castles, Abd al-Rahman helped them to take back Zamora (959) and Oviedo (960) and to overthrow Ordoño IV. Later years Abd al-Rahman was accused of retreating in his later years into the "self-indulgent" comforts of his harem. Indeed he is known to have openly kept a male as well as a female harem (common with a few previous rulers such as Hisham II and Al-Mu'tamid. This likely influenced the polemical story of his sexual attraction for a 13-year-old boy (later enshrined as a Christian martyr and canonised as Saint Pelagius of Córdoba) who refused the Caliph's advances. This story may have been a construct on top of an original tale, however, in which he ordered the boy-slave to convert to Islam. Either way, enraged, he had the boy tortured and dismembered, thus contributing to the Christian perception of Muslim brutality. Abd al-Rahman spent the rest of his years in his new palace outside Córdoba. He died on 15 October 961 and was succeeded by his son al-Hakam II. Legacy Abd al-Rahman was a great humanist and patron of arts, especially architecture. A third of his revenue sufficed for the ordinary expenses of government, a third was hoarded, and a third was spent on buildings. After declaring the caliphate, he had a massive palace complex, known as the Medina Azahara, built some five kilometers north of Córdoba. The Medina Azahara was modeled after the old Umayyad palace in Damascus and served as a symbolic tie between the new caliph and his ancestors. It was said that Córdoba contained 3000 mosques and 100,000 shops and homes during his reign. Under his reign, Córdoba became the most important intellectual centre of Western Europe. He expanded the city's library, which would be further enriched by his successors. He also reinforced the Iberian fleet, which became the most powerful in Mediterranean Europe. Iberian raiders moved up to Galicia, Asturias, and North Africa. The colonizers of Fraxinetum came from al-Andalus as well. Due to his consolidation of power, Muslim Iberia became a power for a few centuries. It also brought prosperity, and with this he created mints where pure gold and silver coins were created. He renovated and added to the Mosque–Cathedral of Córdoba. He was very wary of losing control and kept tight reins in his family. In 949, he executed one of his sons for conspiring against him. He was tolerant of non-Muslims, Jews and Christians who were treated fairly. European Kingdoms sent emissaries such as from Otto I of Germany, and the Byzantine emperor. Personal views and experience Ancestry Abd al-Rahman III's mother Muzna was a Christian captive, possibly from the Pyrenean region. His paternal grandmother Onneca Fortúnez was a Christian princess from the Kingdom of Pamplona. In his immediate ancestry, Abd al-Rahman III was Arab and Hispano–Basque. Notes and references Bibliography External links |- 9th-century births 961 deaths Year of birth uncertain 10th-century caliphs of Córdoba 10th-century Arabs 10th-century Muslims Emirs of Córdoba Pardon recipients Patrons of the arts People from Córdoba, Spain Umayyad caliphs of Córdoba Spanish people of Arab descent Spanish humanists Spanish people of Basque descent

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https://en.wikipedia.org/wiki/Abd%20al-Rahman%20IV

Abd al-Rahman IV

Abd ar-Rahman IV Mortada () was the Caliph of Córdoba in the Umayyad dynasty in Al-Andalus, succeeding Sulayman ibn al-Hakam, in 1018. That same year, he was murdered at Cadiz while fleeing from a battle in which he had been deserted by the very supporters which had brought him into power. His brief reign was similar to that of Abd ar-Rahman V Mostadir. References |- Umayyad caliphs of Córdoba 1018 deaths 11th-century caliphs of Córdoba Year of birth unknown

2680

https://en.wikipedia.org/wiki/Abd%20al-Rahman%20V

Abd al-Rahman V

Abd ar-Rahman V () was an Umayyad Caliph of Córdoba. In the agony of the Umayyad dynasty in the Al-Andalus (Moorish Iberia), two princes of the house were proclaimed Caliph of Córdoba for a very short time, Abd-ar-Rahman IV Mortada (1017), and Abd-ar-Rahman V Mostadir (1023–1024). Both were the mere puppets of factions, who deserted them at once. Abd-ar-Rahman IV was murdered the same year he was proclaimed at Cadiz, in flight from a battle in which he had been deserted by his supporters. Abd-ar-Rahman V was proclaimed caliph in December 1023 at Córdoba, and murdered in January 1024 by a mob of unemployed workmen, headed by one of his own cousins. References 1001 births 1024 deaths Umayyad caliphs of Córdoba 11th-century caliphs of Córdoba

2681

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

Abdulaziz

Abdulaziz ( ; 8 February 18304 June 1876) was the 32nd Sultan of the Ottoman Empire and reigned from 25 June 1861 up until 30 May 1876, where he was overthrown via a government coup. He was the son of Sultan Mahmud II and succeeded his brother Abdulmejid I in 1861. Born at Eyüp Palace, Constantinople (present-day Istanbul), on 8 February 1830, Abdulaziz received an Ottoman education but was nevertheless an ardent admirer of the material progress that was made in the West. He was the first Ottoman Sultan who travelled to Western Europe, visiting a number of important European capitals including Paris, London, and Vienna in the summer of 1867. Apart from his passion for the Ottoman Navy, which had the world's third largest fleet in 1875 (after the British and French navies), the Sultan took an interest in documenting the Ottoman Empire. He was also interested in literature and was a talented classical music composer. Some of his compositions, together with those of the other members of the Ottoman dynasty, have been collected in the album European Music at the Ottoman Court by the London Academy of Ottoman Court Music. He was deposed on grounds of mismanaging the Ottoman economy on 30 May 1876, and was found dead six days later under unnatural and mysterious circumstances. Early life His parents were Mahmud II and Pertevniyal Sultan (1812–1883), originally named Besime, a Circassian. In 1868 Pertevniyal was residing at Dolmabahçe Palace. That year Abdulaziz took the visiting Eugénie de Montijo, Empress of France, to see his mother. Pertevniyal considered the presence of a foreign woman within her private quarters of the seraglio to be an insult. She reportedly slapped Eugénie across the face, which almost caused an international incident. According to another account, Pertevniyal was outraged by the forwardness of Eugénie in taking the arm of one of her sons while he gave a tour of the palace garden, and she gave the Empress a slap on the stomach as a possibly more subtly intended reminder that they were not in France. The Pertevniyal Valide Sultan Mosque was built under the patronage of his mother. The construction work began in November 1869 and the mosque was finished in 1871. His paternal grandparents were Sultan Abdul Hamid I and Sultana Nakşidil Sultan. Several accounts identify his paternal grandmother with Aimée du Buc de Rivéry, a cousin of Empress Joséphine. Pertevniyal was a sister of Khushiyar Qadin, third wife of Ibrahim Pasha of Egypt. Khushiyar and Ibrahim were the parents of Isma'il Pasha. Reign Between 1861 and 1871, the Tanzimat reforms which began during the reign of his brother Abdulmejid I were continued under the leadership of his chief ministers, Mehmed Fuad Pasha and Mehmed Emin Âli Pasha. New administrative districts (vilayets) were set up in 1864 and a Council of State was established in 1868. Public education was organized on the French model and Istanbul University was reorganised as a modern institution in 1861. He was also integral in establishing the first Ottoman civil code. Abdulaziz cultivated good relations with France and the United Kingdom. In 1867 he was the first Ottoman sultan to visit Western Europe; his trip included a visit to the Exposition Universelle (1867) in Paris and a trip to the United Kingdom, where he was made a Knight of the Garter by Queen Victoria and shown a Royal Navy Fleet Review with Ismail Pasha. He travelled by a private rail car, which today can be found in the Rahmi M. Koç Museum in Istanbul. His fellow Knights of the Garter created in 1867 were Charles Gordon-Lennox, 6th Duke of Richmond, Charles Manners, 6th Duke of Rutland, Henry Somerset, 8th Duke of Beaufort, Prince Arthur, Duke of Connaught and Strathearn (a son of Queen Victoria), Franz Joseph I of Austria and Alexander II of Russia. Also in 1867, Abdulaziz became the first Ottoman Sultan to formally recognize the title of Khedive (Viceroy) to be used by the Vali (Governor) of the Ottoman Eyalet of Egypt and Sudan (1517–1867), which thus became the autonomous Ottoman Khedivate of Egypt and Sudan (1867–1914). Muhammad Ali Pasha and his descendants had been the governors (Vali) of Ottoman Egypt and Sudan since 1805, but were willing to use the higher title of Khedive, which was unrecognized by the Ottoman government until 1867. In return, the first Khedive, Ismail Pasha, had agreed a year earlier (in 1866) to increase the annual tax revenues which Egypt and Sudan would provide for the Ottoman treasury. Between 1854 and 1894, the revenues from Egypt and Sudan were often declared as a surety by the Ottoman government for borrowing loans from British and French banks. After the Ottoman government declared a sovereign default on its foreign debt repayments on 30 October 1875, which triggered the Great Eastern Crisis in the empire's Balkan provinces that led to the devastating Russo-Turkish War (1877–78) and the establishment of the Ottoman Public Debt Administration in 1881, the importance for Britain of the sureties regarding the Ottoman revenues from Egypt and Sudan increased. Combined with the much more important Suez Canal which was opened in 1869, these sureties were influential in the British government's decision to occupy Egypt and Sudan in 1882, with the pretext of helping the Ottoman-Egyptian government to put down the ʻUrabi revolt (1879–1882). Egypt and Sudan (together with Cyprus) nominally remained Ottoman territories until 5 November 1914, when the British Empire declared war against the Ottoman Empire during World War I. In 1869, Abdulaziz received visits from Eugénie de Montijo, Empress consort of Napoleon III of France and other foreign monarchs on their way to the opening of the Suez Canal. The Prince of Wales, the future Edward VII, twice visited Istanbul. By 1871, both Mehmed Fuad Pasha and Mehmed Emin Âli Pasha were dead. The Second French Empire, his Western European model, had been defeated in the Franco-Prussian War by the North German Confederation under the leadership of the Kingdom of Prussia. Abdulaziz turned to the Russian Empire for friendship, as unrest in the Balkan provinces continued. In 1875, the Herzegovinian rebellion was the beginning of further unrest in the Balkan provinces. In 1876, the April Uprising saw insurrection spreading among the Bulgarians. Ill feeling mounted against Russia for its encouragement of the rebellions. While no one event led to his being deposed, the crop failure of 1873 and his lavish expenditures on the Ottoman Navy and on new palaces which he had built, along with mounting public debt, helped to create an atmosphere conducive to his being overthrown. Abdulaziz was deposed by his ministers on 30 May 1876. Death Abdulaziz's death at Çırağan Palace in Istanbul a few days later was documented as a suicide. Following Sultan Abdulaziz's dethronement, he was taken into a room at Topkapi Palace. This room happened to be the same room that Sultan Selim III was murdered in. The room caused him to be concerned for his life and he subsequently requested to be moved to Beylerbeyi Palace. His request was denied for the palace was considered inconvenient for his situation and he was moved to Feriye Palace instead. He nevertheless had grown increasingly nervous and paranoid about his security. In the morning of 5 June, Abdulaziz asked for a pair of scissors to trim his beard. Shortly after this, he was found dead in a pool of blood flowing from two wounds in his arms. Several physicians were allowed to examine his body. Among which "Dr. Marco, Nouri, A. Sotto, Physician attached to the Imperial and Royal Embassy of Austria‐Hungary; Dr. Spagnolo, Marc Markel, Jatropoulo, Abdinour, Servet, J. de Castro, A. Marroin, Julius Millingen, C. Caratheodori; E. D. Dickson, Physician of the British Embassy; Dr. O. Vitalis, Physician of the Sanitary Board; Dr. E. Spadare, J. Nouridjian, Miltiadi Bey, Mustafa, Mehmed" certified that the death had been "caused by the loss of blood produced by the wounds of the blood‐vessels at the joints of the arms" and that "the direction and nature of the wounds, together with the instrument which is said to have produced them, lead us to conclude that suicide had been committed". One of those physicians also stated that "His skin was very pale, and entirely free from bruises, marks or spots of any kind whatever. There was no lividity of the lips indicating suffocation nor any sign of pressure having been applied to the throat". Conspiracy Theories There are several sources claiming the death of Abdulaziz was due to an assassination. Islamic nationalist author Necip Fazıl Kısakürek claimed that it was a clandestine operation carried out by the British. Another similar claim is based on the book The Memoirs of Sultan Abdulhamid II. In the book, which turned out to be a fraud, Abdulhamid II claims that Sultan Murad V had begun to show signs of paranoia, madness, and continuous fainting and vomiting until the day of his coronation, and he even threw himself into a pool yelling at his guards to protect his life. High-ranking politicians of the time were afraid the public would become outraged and revolt to bring Abdulaziz back to power. Thus, they arranged the assassination of Abdulaziz by cutting his wrists and announced that "he committed suicide". This book of memoir was commonly referred to as a first-hand testimony of the assassination of Abdulaziz. Yet it was proven, later on, that Abdulhamid II never wrote nor dictated such a document. Achievements Abdulaziz gave special emphasis on modernizing the Ottoman Navy. In 1875, the Ottoman Navy had 21 battleships and 173 warships of other types, ranking as the third largest navy in the world after the British and French navies. His passion for the Navy, ships and sea can be observed in the wall paintings and pictures of the Beylerbeyi Palace on the Bosphorus strait in Istanbul, which was constructed during his reign. However, the large budget for modernizing and expanding the Navy (combined with a severe drought in 1873 and incidents of flooding in 1874 which damaged Ottoman agriculture and reduced the government's tax revenues) contributed to the financial difficulties which caused the Porte to declare a sovereign default with the "Ramazan Kanunnamesi" on 30 October 1875. The subsequent decision to increase agricultural taxes for paying the Ottoman public debt to foreign creditors (mainly British and French banks) triggered the Great Eastern Crisis in the empire's Balkan provinces. The crisis culminated in the Russo-Turkish War (1877–78) that devastated the already struggling Ottoman economy, and the establishment of the Ottoman Public Debt Administration in 1881, during the early years of Sultan Abdülhamid II's reign. The first Ottoman railroads were opened between İzmir–Aydın and Alexandria–Cairo in 1856, during the reign of Sultan Abdulmejid I. The first large railway terminal within present-day Turkey, the Alsancak Terminal in Izmir, was opened in 1858. However, these were individual, unconnected railroads, without a railway network. Sultan Abdulaziz established the first Ottoman railway networks. On 17 April 1869, the concession for the Rumelia Railway (i.e. Balkan Railways, Rumeli (Rumelia) meaning the Balkan peninsula in Ottoman Turkish) which connected Istanbul to Vienna was awarded to Baron Maurice de Hirsch (Moritz Freiherr Hirsch auf Gereuth), a Bavaria-born banker from Belgium. The project foresaw a railway route from Istanbul via Edirne, Plovdiv and Sarajevo to the shore of the Sava River. In 1873, the first Sirkeci Terminal in Istanbul was opened. The temporary Sirkeci terminal building was later replaced with the current one which was built between 1888 and 1890 (during the reign of Abdülhamid II) and became the final destination terminus of the Orient Express. In 1871, Sultan Abdulaziz established the Anatolia Railway. Construction works of the on the Asian side of Istanbul, from Haydarpaşa to Pendik, began in 1871. The line was opened on 22 September 1872. The railway was extended to Gebze, which opened on 1 January 1873. In August 1873 the railway reached Izmit. Another railway extension was built in 1871 to serve a populated area along Bursa and the Sea of Marmara. The Anatolia Railway was then extended to Ankara and eventually to Mesopotamia, Syria and Arabia during the reign of Sultan Abdülhamid II, with the completion of the Baghdad Railway and Hejaz Railway. Under his reign, Turkey's first postage stamps were issued in 1863, and the Ottoman Empire joined the Universal Postal Union in 1875 as a founding member. He also was responsible for the first civil code for the Ottoman Empire. He was the first Ottoman sultan who travelled to Western Europe. His voyage in visiting order (from 21 June 1867 to 7 August 1867): Istanbul – Messina – Naples – Toulon – Marseille – Paris – Boulogne – Dover – London – Dover – Calais – Brussels – Koblenz – Vienna – Budapest – Orșova – Vidin – Ruse – Varna – Istanbul. Impressed by the museums in Paris (30 June – 10 July 1867), London (12–23 July 1867) and Vienna (28–30 July 1867) which he visited in the summer of 1867, he ordered the establishment of an Imperial Museum in Istanbul: the Istanbul Archaeology Museum. Personal life Abdulaziz had five wives. They were Dürrünev Kadın, Hayranidil Kadın, Edadil Kadın, Nesrin Kadın, and Gevheri Kadın. He also wanted to marry Princess Tawhida Hanim, daughter of Isma'il Pasha, khedive of Egypt. However, grand vizier Mehmed Fuad Pasha opposed the love match on the grounds that Isma'il then would have too favourable a backstairs entrée to the Sultan. Fuad's objection was written on a small paper, and given to the head chamberlain, who instead of reading it to Abdulaziz, handed it to him. The Sultan was insulted, Fuad was fired, and the marriage plans were cancelled. Issue Honours Mexican Empire: Grand Cross of the Mexican Eagle, with Collar, 1865 : Stranger Knight of the Garter, 14 August 1867 : Grand Cross of the Tower and Sword : Knight of the Golden Fleece, 24 June 1870 : Grand Cross of the Order of Duke Peter Friedrich Ludwig, with Golden Crown, 14 December 1874 Annotations References Sources External links 1830 births 1876 deaths 1870s suicides Dethroned monarchs Ottoman dynasty 19th-century Ottoman sultans Turks of the Ottoman Empire Composers of Ottoman classical music Composers of Turkish makam music Grand Crosses of the Order of Saint Stephen of Hungary Knights of the Golden Fleece of Spain Extra Knights Companion of the Garter

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https://en.wikipedia.org/wiki/Abdera%2C%20Spain

Abdera, Spain

Abdera was an ancient Carthaginian and Roman port on a hill above the modern Adra on the southeastern Mediterranean coast of Spain. It was located between Malaca (now Málaga) and Carthago Nova (now Cartagena) in the district inhabited by the Bastuli. Name Abdera shares its name with a city in Thrace and another in North Africa. Its coins bore the inscription (). The first element in the name appears to be the Punic word for "servant" or "slave"; the second element seems shared by the Phoenician names for Gadir (now Cadiz) and Cythera but of unclear meaning. It appears in Greek sources as tà Ábdēra () and Aúdēra (), Ábdara (), and tò Ábdēron (). History It was founded by the Carthaginians as a trading station and, after a period of decline, became one of the more important towns in the Roman province of Hispania Baetica. Tiberius seems to have made the place a Roman colony. Coins The most ancient coins bear its name with the head of Melqart and a tuna. Coins from the time of Tiberius show the town's main temple with two erect tunas as its columns. Early Roman coins were bilingual with Latin inscriptions on one side stating the name of the emperor and the town and with Punic text on the other side simply stating the name of the town. Notes References Citations Bibliography . Further reading Archaeological sites in Spain Phoenician colonies in Spain Former populated places in Spain

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https://en.wikipedia.org/wiki/Abdera%2C%20Thrace

Abdera, Thrace

Abdera () is a municipality in the Xanthi regional unit of Thrace, Greece. In classical antiquity, it was a major Greek polis on the Thracian coast. The ancient polis is to be distinguished from the municipality, which was named in its honor. The polis lay 17 km east-northeast of the mouth of the Nestos River, almost directly opposite the island of Thasos. It was a colony placed in previously unsettled Thracian territory, not then a part of Hellas, during the age of Greek colonization. The city that developed from it became of major importance in ancient Greece. After the 4th centuryAD it declined, contracted to its acropolis, and was abandoned, never to be reoccupied except by archaeologists. Meanwhile, life went on as the changing population settled in other communities in the region. One named Polystylus changed its name to Abdera. In 2011 the municipality of Abdera was synoecized from three previous municipalities comprising a number of modern settlements. The ancient site remains in it as a ruin. The municipality of Abdera has 19,005 inhabitants (2011). The seat of the municipality is the town Genisea. Name The name Abdera is of Phoenician origin and was shared in antiquity by Abdera, Spain and a town near Carthage in North Africa. It was variously Hellenized as (Ábdēra), (Aúdēra), (Ábdara), (Ábdēron), and (Ábdēros), before being Latinized as Abdera. Greek legend attributed the name to an eponymous Abderus who fell nearby and was memorialized by Hercules's founding of a city at the location. The present-day town is written Avdira () and pronounced in modern Greek. History Antiquity The Phoenicians apparently began the settlement of Abdera at some point before the mid-7th century and the town long maintained Phoenician standards in its coinage. The Greek settlement was begun as a failed colony from Klazomenai, traditionally dated to 654BC. (Evidence in 7th-century-BC Greek pottery tends to support the traditional date but the exact timing remains uncertain.) Herodotus reports that the leader of the colony had been Timesios but, within his generation, the Thracians had expelled the colonists. Timesios was subsequently honored as a local protective spirit by the later Abderans from Teos. Others recount various legends about this colony. Plutarch and Aelian relate that Timesios grew insufferable to his colonists because of his desire to do everything by himself; when one of their children let him know how they all really felt, he quit the settlement in disgust; modern scholars have tried to split the difference between the two accounts of early Abdera's failure by giving the latter as the reason for Timesios's having left Klazomenai. The successful foundation occurred in 544BC, when the majority of the people of Teos (including the poet Anacreon) migrated to Abdera to escape the Persian yoke. The chief coin type, a griffon, is identical with that of Teos; the rich silver coinage is noted for the beauty and variety of its reverse types. In 513 and 512BC, the Persians, under Darius conquered Abdera, by which time the city seems to have become a place of considerable importance, and is mentioned as one of the cities which had the expensive honour of entertaining the great king on his march into Greece. In 492BC, after the Ionian Revolt, the Persians again conquered Abdera, again under Darius I but led by his general Mardonius. On his flight after the Battle of Salamis, Xerxes stopped at Abdera and acknowledged the hospitality of its inhabitants by presenting them with a tiara and scimitar of gold. Thucydides mentions Abdera as the westernmost limit of the Odrysian kingdom when at its height at the beginning of the Peloponnesian war. It later became part of the Delian League and fought on the side of Athens in the Peloponnesian war. Abdera was a wealthy city, the third richest in the League, due to its status as a prime port for trade with the interior of Thrace and the Odrysian kingdom. In 408BC, Abdera was reduced under the power of Athens by Thrasybulus, then one of the Athenian generals in that quarter. A valuable prize, the city was repeatedly sacked: by the Triballi in 376BC, Philip II of Macedon in 350BC; later by Lysimachos of Thrace, the Seleucids, the Ptolemies, and again by the Macedonians. In 170BC the Roman armies and those of Eumenes II of Pergamon besieged and sacked it. The town seems to have declined in importance after the middle of the 4th centuryBC. Cicero ridicules the city as a byword for stupidity in his letters to Atticus, writing of a debate in the Senate, "Here was Abdera, but I wasn't silent" ("Hic, Abdera non tacente me"). Nevertheless, the city counted among its citizens the philosophers Democritus, Protagoras and Anaxarchus, historian and philosopher Hecataeus of Abdera, and the lyric poet Anacreon. Pliny the Elder speaks of Abdera as being in his time a free city. Abdera had flourished especially in ancient times mainly for two reasons: because of the large area of their territory and their highly strategic position. The city controlled two great road passages (one of Nestos river and other through the mountains north of Xanthi). Furthermore, from their ports passed the sea road, which from Troas led to the Thracian and then the Macedonian coast. The ruins of the town may still be seen on Cape Balastra (40°56'1.02"N 24°58'21.81"E); they cover seven small hills, and extend from an eastern to a western harbor; on the southwestern hills are the remains of the medieval settlement of Polystylon. Modern Avdira as a modern administrative unit (community) was established in 1924, and consisted of the villages Avdira, Myrodato (Kalfalar), Pezoula, Giona, Veloni and Mandra, but Myrodato and Mandra became separate communities in 1928. The municipality Avdira was formed in 1997 by the merger of the former communities Avdira, Mandra, Myrodato and Nea Kessani. At the 2011 local government reform it merged with the former municipalities Selero and Vistonida, and the town Genisea became its seat. The municipality has an area of 352.047 km2, the municipal unit 161.958 km2. The municipal unit Avdira is subdivided into the communities Avdira, Mandra, Myrodato and Nea Kessani. The community Avdira consists of the settlements Avdira, Giona, Lefkippos, Pezoula and Skala. Landmarks Landmarks of Abdera include the Archaeological Museum of Abdera, and Agios Ioannis Beach (also Paralia Avdiron) near the village Lefkippos. Famous people Democritus Protagoras Hecateus See also List of ancient Greek cities Notes References Citations Sources External links . Municipalities of Eastern Macedonia and Thrace Populated places in Xanthi (regional unit) Ionian colonies in Thrace Ancient Greek cities Members of the Delian League Populated places established in the 7th century BC Greek city-states Populated places in ancient Thrace Phoenician colonies in Greece

2686

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

Apollos

Apollos () was a 1st-century Alexandrian Jewish Christian mentioned several times in the New Testament. A contemporary and colleague of Paul the Apostle, he played an important role in the early development of the churches of Ephesus and Corinth. Biblical account Acts of the Apostles Apollos is first mentioned as a Christian preacher who had come to Ephesus (probably in AD 52 or 53), where he is described as "being fervent in spirit: he spoke and taught accurately the things concerning Jesus, though he knew only the baptism of John". Priscilla and Aquila, a Jewish Christian couple who had come to Ephesus with the Apostle Paul, instructed Apollos: "When Priscilla and Aquila heard him, they took him aside and explained to him the way of God more adequately." The differences between the two understandings probably related to the Christian baptism, since Apollos "knew only the baptism of John". Later, during Apollos' absence, the writer of the Acts of the Apostles recounts an encounter between Paul and some disciples at Ephesus: Before Paul's arrival, Apollos had moved from Ephesus to Achaia and was living in Corinth, the provincial capital of Achaia. Acts reports that Apollos arrived in Achaia with a letter of recommendation from the Ephesian Christians and "greatly helped those who through grace had believed, for he powerfully refuted the Jews in public, showing by the Scriptures that the Christ was Jesus. 1 Corinthians Paul's First Epistle to the Corinthians (AD 55) mentions Apollos as an important figure at Corinth. Paul describes Apollos' role at Corinth: I planted, Apollos watered, but God gave the growth. Paul's Epistle refers to a schism between four parties in the Corinthian church, of which two attached themselves to Paul and Apollos respectively, using their names (the third and fourth were Peter, identified as Cephas, and Jesus Christ himself). It is possible, though, that, as Msgr. Ronald Knox suggests, the parties were actually two, one claiming to follow Paul, the other claiming to follow Apollos. "It is surely probable that the adherents of St. Paul [...] alleged in defence of his orthodoxy the fact that he was in full agreement with, and in some sense commissioned by, the Apostolic College. Hence 'I am for Cephas'. [...] What reply was the faction of Apollos to make? It devised an expedient which has been imitated by sectaries more than once in later times; appealed behind the Apostolic College itself to him from whom the Apostolic College derived its dignity; 'I am for Christ'." Paul states that the schism arose because of the Corinthians' immaturity in faith. Apollos was a devout Jew born in Alexandria. Apollos' origin in Alexandria has led to speculations that he would have preached in the allegorical style of Philo. Theologian Jerome Murphy-O'Connor, for example, commented: "It is difficult to imagine that an Alexandrian Jew ... could have escaped the influence of Philo, the great intellectual leader ... particularly since the latter seems to have been especially concerned with education and preaching." There is no indication that Apollos favored or approved an overestimation of his person. Paul urged him to go to Corinth at the time, but Apollos declined, stating that he would come later when he had an opportunity. Epistle to Titus Apollos is mentioned one more time in the New Testament. In the Epistle to Titus, the recipient is exhorted to "speed Zenas the lawyer and Apollos on their way". Extrabiblical information Jerome states that Apollos was so dissatisfied with the division at Corinth that he retired to Crete with Zenas; and that once the schism had been healed by Paul's letters to the Corinthians, Apollos returned to the city and became one of its elders. Less probable traditions assign to him the bishopric of Duras, or of Iconium in Phrygia, or of Caesarea. Pope Benedict XVI suggested that the name "Apollos" was probably short for Apollonius or Apollodorus. He also suggested there were those in Corinth "...fascinated by [Apollo's] way of speaking...." Significance Martin Luther and some modern scholars have proposed Apollos as the author of the Epistle to the Hebrews, rather than Paul or Barnabas. Both Apollos and Barnabas were Jewish Christians with sufficient intellectual authority. The Pulpit Commentary treats Apollos' authorship of Hebrews as "generally believed". Other than this, there are no known surviving texts attributed to Apollos. Apollos is regarded as a saint by several Christian churches, including the Lutheran Church–Missouri Synod, which hold a commemoration for him, together with saints Aquila and Priscilla, on 13 February. Apollos is considered one of the 70 apostles and his feast day is December 8th in the Eastern Orthodox church. Apollos is not to be confused with St. Apollo of Egypt, a monk whose feast day is January 25th who died in 395. Apollos does not have a feast day of his own in the traditional Roman Martyrology, nor is he reputed to have ever been a monk (as most monks come after St. Anthony the Great). Notes References Articles in Encyclopaedia Biblica Herzog-Hauck, Realencyklopadie The Jewish Encyclopedia (Jewish Encyclopedia: Apollos) James Hastings, Dictionary of the Bible Karl Heinrich von Weizsäcker, Das apostolische Zeitalter (1886) A. C. McGiffert, History of Christianity in the Apostolic Age. Initial text from Schaff-Herzog Encyclopedia of Religion 1st-century bishops in Roman Achaea Christianity in Roman Corinth Early Jewish Christians People in the Pauline epistles Seventy disciples Converts to Christianity from Judaism Biblical apostles First Epistle to the Corinthians

2687

https://en.wikipedia.org/wiki/Acquis%20communautaire

Acquis communautaire

The Community acquis or acquis communautaire (; ), sometimes called the EU acquis and often shortened to acquis, is the accumulated legislation, legal acts and court decisions that constitute the body of European Union law. The term is French: acquis meaning "that which has been acquired or obtained", and communautaire meaning "of the community". Chapters During the process of the enlargement of the European Union, the acquis was divided into 31 chapters for the purpose of negotiation between the EU and the candidate member states for the fifth enlargement (the ten that joined in 2004 plus Romania and Bulgaria which joined in 2007). These chapters were: Free movement of goods Free movement of persons Freedom to provide services Free movement of capital Company law Competition policy Agriculture Fisheries Transport policy Taxation Economic and Monetary Union Statistics Social policy and employment Energy Industrial policy Small and medium-sized enterprises Science and research Education and training Telecommunication and information technologies Culture and audio-visual policy Regional policy and co-ordination of structural instruments Environment Consumers and health protection Cooperation in the field of Justice and Home Affairs Customs union External relations Common Foreign and Security Policy (CFSP) Financial control Financial and budgetary provisions Institutions Others For the negotiations with Croatia (which joined in 2013), Iceland, Turkey, Montenegro, Serbia and in the future, with North Macedonia, Albania (candidate countries), the acquis is split up into 35 chapters instead, with the purpose of better balancing between the chapters: dividing the most difficult ones into separate chapters for easier negotiation, uniting some easier chapters, moving some policies between chapters, as well as renaming a few of them in the process: Free movement of goods Freedom of movement for workers Right of establishment and freedom to provide services Free movement of capital Public procurement Company law Intellectual property law Competition policy Financial services Information society and media Agriculture and rural development Food safety, veterinary and phytosanitary policy Fisheries Transport policy Energy Taxation Economic and monetary policy Statistics Social policy and employment (including anti-discrimination and equal opportunities for women and men) Enterprise and industrial policy Trans-European networks Regional policy and co-ordination of structural instruments Judiciary and fundamental rights Justice, freedom and security Science and research Education and culture Environment Consumer and health protection Customs union External relations Foreign, security and defence policy Financial control Financial and budgetary provisions Institutions Other issues Correspondence between chapters of the 5th and the 6th Enlargement: Such negotiations usually involved agreeing transitional periods before new member states needed to implement the laws of the European Union fully and before they and their citizens acquired full rights under the acquis. Terminology The term acquis is also used to describe laws adopted under the Schengen Agreement, prior to its integration into the European Union legal order by the Treaty of Amsterdam, in which case one speaks of the Schengen acquis. The term acquis has been borrowed by the World Trade Organization Appellate Body, in the case Japan – Taxes on Alcoholic Beverages, to refer to the accumulation of General Agreement on Tariffs and Trade (GATT) and WTO law ("acquis gattien"), though this usage is not well established. It has been used to describe the achievements of the Council of Europe (an international organisation unconnected with the European Union): It has also been applied to the body of "principles, norms and commitments" of the Organization for Security and Co-operation in Europe (OSCE): The Organisation for Economic Co-operation and Development (OECD) introduced the concept of the OECD Acquis in its "Strategy for enlargement and outreach", May 2004. See also Official Journal of the European Union Primacy of European Union law References External links EUR-Lex: European Union Law. JRC-Acquis, Aligned multilingual parallel corpus: 23,000 Acquis-related texts per language, available in 22 languages. Total size: 1 Billion words. Translation Memory of the EU-Acquis: Up to 1 Million translation units each, for 231 language pairs. European Union constitutional law

2689

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

Antacid

An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. Some antacids have been used in the treatment of constipation and diarrhea. Marketed antacids contain salts of aluminum, calcium, magnesium, or sodium. Some preparations contain a combination of two salts, such as magnesium carbonate and aluminum hydroxide (e.g. hydrotalcite). Medical uses Antacids are available over the counter and are taken by mouth to quickly relieve occasional heartburn, the major symptom of gastroesophageal reflux disease and indigestion. Treatment with antacids alone is symptomatic and only justified for minor symptoms. Alternative uses for antacids include constipation, diarrhea, hyperphosphatemia, and urinary alkalization. Some antacids are also used as an adjunct to pancreatic enzyme replacement therapy in the treatment of pancreatic insufficiency. Non-particulate antacids (sodium citrate, magnesium trisilicate) increase gastric pH with little or no effect on gastric volume, and therefore may see some limited use in pre-operative procedures. Sodium citrate should be given within 1 hour of surgery to be the most effective. Side effects Formulations containing magnesium salts may cause diarrhea, whereas those containing calcium or aluminum may cause constipation. Rarely, long-term use of calcium carbonate may cause kidney stones. Long-term use of antacids containing aluminum may increase the risk of developing osteoporosis. In vitro studies have found a potential for acid rebound to occur due to antacid overuse, however the significance of this finding has been called into question. Properties of antacids When an excess amount of acid is produced in the stomach, the natural mucous barrier that protects the lining of the stomach can degrade, leading to pain and irritation. There is also potential for the development of acid reflux, which can cause pain and damage to the esophagus. Antacids contain alkaline ions that chemically neutralize stomach gastric acid, reducing damage to the stomach lining and esophagus, and relieving pain. Some antacids also inhibit pepsin, an enzyme that can damage the esophagus in acid reflux. Antacids do not directly inhibit acid secretion, and thus are distinct from acid-reducing drugs like H2-receptor antagonists or proton pump inhibitors. Antacids do not kill the bacteria Helicobacter pylori, which causes most ulcers. Interactions Antacids are known to interact with several oral medications, including fluoroquinolone and tetracycline antibiotics, iron, itraconazole, and prednisone. Metal chelation is responsible for some of these interactions (e.g. fluoroquinolones, tetracyclines), leading to decreased absorption of the chelated drug. Some interactions may be due to the pH increase observed in the stomach following antacid ingestion, leading to increased absorption of weak acids, and decreased absorption of weak bases. Antacids also cause an increase in pH of the urine (alkalization), which may cause increased blood concentrations of weak bases, and increased excretion of weak acids. A proposed method to mitigate the effects of stomach acidity and chelation on drug absorption is to space out the administration of antacids with interacting medications, however this method has not been well studied for drugs affected by urine alkalization. There are concerns regarding interactions between delayed-release tablets and antacids, as antacids may increase the stomach pH to a point at which the coating of the delayed-release tablet will dissolve, leading to degradation of the drug if it is pH sensitive. Formulations Antacids may be formulated with other active ingredients such as simethicone to control gas, or alginic acid to act as a physical barrier to acid. Liquids Several liquid antacid preparations are marketed. Common liquid preparations include milk of magnesia and magnesium/aluminum combinations. A potential advantage of using a liquid preparation over a tablet is that liquids may provide quicker relief, however this may coincide with a shorter duration of action. Tablets Chewable tablets Chewable tablets are one of the most common forms of antacids, and are readily available over-the-counter. Upon reaching the stomach, the tablet powder will dissolve in the stomach acid, allowing the cations to be released and neutralize excess stomach acid. Common salts available in tablet form include those of calcium, magnesium, aluminum, and sodium. Effervescent tablets Effervescent tablets are tablets which are designed to dissolve in water, and then release carbon dioxide. Common ingredients include citric acid and sodium bicarbonate, which react when in contact with water to produce carbon dioxide. Effervescent antacids may also contain aspirin, sodium carbonate, or tartaric acid. Those containing aspirin may cause further gastric irritation and ulceration due to aspirin's effects on the mucous membrane of the stomach. Common brands include Alka-Seltzer, Gaviscon and Eno. See also Bismuth Subsalicylate Mylanta References

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

Antidiarrhoeal

An anti-diarrhoeal drug (or anti-diarrheal drug in American English) is any medication which provides symptomatic relief for diarrhoea. Types Electrolyte solutions, while not true antidiarrhoeals, are used to replace lost fluids and salts in acute cases. Bulking agents like methylcellulose, guar gum or plant fibre (bran, sterculia, isabgol, etc.) are used for diarrhoea in functional bowel disease and to control ileostomy output. Absorbents absorb toxic substances that cause infective diarrhoea, methylcellulose is an absorbent. Anti-inflammatory compounds such as bismuth subsalicylate. Anticholinergics reduce intestinal movement and are effective against both diarrhoea and accompanying cramping. Opioids' classical use besides pain relief is as an anti-diarrhoeal drug. Opioids have agonist actions on the intestinal opioid receptors, which when activated cause constipation. Drugs such as morphine or codeine can be used to relieve diarrhoea this way. A notable opioid for the purpose of relief of diarrhoea is loperamide which is only an agonist of the μ opioid receptors in the large intestine and does not have opioid affects in the central nervous system as it doesn't cross the blood–brain barrier in significant amounts. This enables loperamide to be used to the same benefit as other opioid drugs but without the CNS side effects or potential for abuse. See also ATC code A07 Antidiarrheals, intestinal anti-inflammatory/anti-infective agents References

2691

https://en.wikipedia.org/wiki/%C3%81ed%20mac%20Cin%C3%A1eda

Áed mac Cináeda

Áed mac Cináeda (Modern Scottish Gaelic: Aodh mac Choinnich; ; died 878) was a son of Cináed mac Ailpín. He became king of the Picts in 877, when he succeeded his brother Constantín mac Cináeda. He was nicknamed Áed of the White Flowers, the wing-footed () or the white-foot (). Sources The Chronicle of the Kings of Alba says of Áed: "Edus [Áed] held the same [i.e., the kingdom] for one year. The shortness of his reign has bequeathed nothing memorable to history. He was slain in the civitas of Nrurim." Nrurim is unidentified. The Annals of Ulster say that, in 878, "Áed mac Cináeda, king of the Picts, was killed by his associates." Tradition, reported by George Chalmers in his Caledonia (1807), and by the New Statistical Account (1834–1845), has it that the early-historic mound of the Cunninghillock by Inverurie is the burial place of Áed. This is based on reading Nrurim as Inruriu. A longer account is interpolated in Andrew of Wyntoun's Orygynale Cronykil of Scotland. This says that Áed reigned one year and was killed by his successor Giric in Strathallan and other king lists have the same report. It is uncertain which, if any, of the Prophecy of Berchán'''s kings should be taken to be Áed. William Forbes Skene presumed that the following verses referred to Áed:129. Another king will take [sovereignty]; small is the profit that he does not divide. Alas for Scotland thenceforward. His name will be the Furious.130. He will be but a short time over Scotland. The will be no [word uncertain] unplundered. Alas for Scotland, through the youth; alas for their books, alas for their bequests.131. He will be nine years in the kingdom. I shall tell you—it will be a tale of truth—he dies without bell, with communion, at evening, in a fatal pass. Áed's son, Constantín mac Áeda, became king in 900. See also Kingdom of Alba References Sources Anderson, Alan Orr, Early Sources of Scottish History A.D 500–1286, volume 1. Reprinted with corrections. Paul Watkins, Stamford, 1990. Anderson, Marjorie Ogilvie, Kings and Kingship in Early Scotland. Scottish Academic Press, Edinburgh, revised edition 1980. Duncan, A. A. M., The Kingship of the Scots 842–1292: Succession and Independence. Edinburgh University Press, Edinburgh, 2002. Smyth, Alfred P., Warlords and Holy Men: Scotland AD 80–1000.'' E.J. Arnold, London, 1984 (reprinted Edinburgh UP). External links The Chronicle of the Kings of Alba (CKA) Friends of Grampian Stones - history of Inverurie Second Statistical Account [vol. XII (County of Aberdeen), p. 681] 878 deaths 9th-century Scottish monarchs Burials at Iona Abbey House of Alpin Year of birth unknown Gaels

2692

https://en.wikipedia.org/wiki/Abdul%20Hamid%20I

Abdul Hamid I

Abdülhamid I, Abdul Hamid I or Abd Al-Hamid I (, `Abdü’l-Ḥamīd-i evvel; ; 20 March 1725 – 7 April 1789) was the 27th Sultan of the Ottoman Empire, reigning over the Ottoman Empire from 1774 to 1789. Early life He was born on 20 March 1725 in Constantinople, a younger son of Sultan Ahmed III (reigned 1703–1730) and his consort Şermi Kadın. Ahmed III abdicated in favor of his nephew Mahmud I, who was succeeded by his brother Osman III, and Osman by Ahmed's elder son Mustafa III. As a potential heir to the throne, Abdul Hamid was imprisoned in comfort by his cousins and older brother, as was customary. This lasted until 1767. During this period, he received his early education from his mother Rabia Şermi, who taught him history and calligraphy. Reign Accession On the day of Mustafa's death on 21 January 1774 , Abdul Hamid ascended to the throne with a ceremony held in the palace. The next day Mustafa III's funeral procession was held. The new sultan sent a letter to the Grand Vizier and Serdar-ı Ekrem Muhsinzade Mehmed Pasha on the front and informed him to continue his duty. On 27 January 1774, the sword was armed in Eyup Sultan. At the time, the Ottoman-Russian front wars continued, the army was at once, and there was a shortage of food in Istanbul. Rule Abdul Hamid's long imprisonment had left him indifferent to state affairs and malleable to the designs of his advisors. Yet he was also very religious and a pacifist by nature. At his accession the financial straits of the treasury were such that the usual donative could not be given to the Janissary Corps. The new Sultan told the Janissaries "There are no longer gratuities in our treasury, as all of our soldier sons should learn." Abdul Hamid now sought to reform the Empire's armed forces. He enumerated the Janissary corps and tried to renovate it, and also the navy. He established a new artillery corps. He was also credited with the creation of the Imperial Naval Engineering School. Abdul Hamid tried to strengthen Ottoman rule over Syria, Egypt, and Iraq. However, slight successes against rebellions in Syria and the Morea could not compensate for the loss of the Crimean Peninsula, which had become nominally independent in 1774, but was in practice now controlled by Russia. Russia repeatedly exploited its position as protector of Eastern Christians to interfere in the Ottoman Empire, and explicitly. Finally the Ottomans declared war against Russia in 1787. Austria soon joined Russia. Turkey held its own in the conflict, at first, but on 6 December 1788, Ochakov fell to Russia (all of its inhabitants being massacred). It is said that this sad defeat broke Abdul Hamid's spirit, as he died four months later. In spite of his failures, Abdul Hamid was regarded as the most gracious Ottoman Sultan. He personally directed the fire brigade during the Constantinople fire of 1782. He was admired by the people for his religious devotion, and was even called a Veli ("saint"). He also outlined a reform policy, supervised the government closely, and worked with statesmen. Abdul Hamid I turned to internal affairs after the war with Russia ended in this way. He tried to suppress internal revolts through Algerian Gazi Hasan Pasha, and to regulate the reform works through Silâhdar Seyyid Mehmed Pasha (Karavezir) and Halil Hamid Pasha. Especially in Syria, the rebellion of Zahir al-Omar, who cooperated with the admirals of the Russian navy in the Mediterranean, benefiting from the confusion caused by the Russian expedition of the 1768 Russian campaign, and suppressed the rebellion in Egypt in 1775, as well as the Kölemen who were in rebellion in Egypt, was brought to the road. On the other hand, the confusion in Peloponnese was ended, and calm was achieved. Kaptanıderyâ Gazi Hasan Pasha and Cezzâr Ahmed Pasha played an important role in suppressing all these events. Treaty of Küçük Kaynarca Despite his pacific inclinations, the Ottoman Empire was forced to renew the ongoing war with Russia almost immediately. This led to complete Turkish defeat at Kozludzha and the humiliating Treaty of Küçük Kaynarca, signed on 21 July 1774. The Ottomans ceded territory to Russia, and also the right to intervene on behalf of the Orthodox Christians in the Empire. With the Treaty of Küçük Kaynarca, the territory left, as well as Russia's ambassador at Istanbul level and an authorized representative, this ambassador's participation in other ceremonies at the state ceremonies, the right to pass through the Straits to Russia, as the envoys of the Russian envoy were given immunity. Marketing opportunities for all kinds of commodities in Istanbul and other ports, as well as the full commercial rights of England and France were given. It was also in the treaty that the Russian state had a church built in Galata. Under the circumstances, this church would be open to the public, referred to as the Russo-Greek Church, and forever under the protection of Russian ambassadors in Istanbul. Relations with Tipu Sultan In 1789, Tipu Sultan, ruler of the Sultanate of Mysore sent an embassy to Abdul Hamid, urgently requesting assistance against the British East India Company, and proposed an offensive and defensive alliance. Abdul Hamid informed the Mysori ambassadors that the Ottomans were still entangled and exhausted from the ongoing war with Russia and Austria. Architecture Abdul Hamid I left many architectural works, mostly in Istanbul. The most important of these is the current in Sirkeci in 1777. It is the building built by the Vakıf Inn. He built a fountain, an elementary school, a madrasah and a library next to this building. The books in the library are kept in the Süleymaniye Library today and the madrasah is used as a stock exchange building. During the construction of the Vakıf Inn, the fountain was removed by construction and the fountain was transferred to the corner of Zeynep Sultan Mosque opposite Gülhane Park. In addition to these works, in 1778, he built a mosque with a mosque on the beach of Beylerbeyi on behalf of Râbia Şermi Kadın, and built fountains in Çamlıca Kısıklı Square, other than places such as İskele Square, Çınarönü, Havuzbaşı and Car Square. In addition, he had the Beylerbeyi Mosque substantially repaired, built a mosque, a fountain and a bath and shops around Emirgi in Emirgân in 1783, and another one for Hümâşah Sultan and his son Mehmed. The fountain has been built more. In addition to these, there is a fountain next to Neslişah Mosque in Istinye, and another fountain on the embankment between Dolmabahçe and Kabataş. Character He wrote down the troubles he saw before, to the grand vizier or to the governor of his empire. He accepted the invitations of the and his grand vizier and went to his mansions, followed by the reading of Quran. He was humble and a religious Sultan. It is known that Abdul Hamid I was fond of his children, was interested in family life, spent the summer months in Karaağaç, Beşiktaş with his consorts, sons and daughters. His daughter Esma Sultan's dressing styles, her passion for entertainment, her journey to the objects with her journeymen and concubines have set an example for Istanbul ladies. Family Consorts Abdul Hamid had married all of his consorts. He had made marriage of conscience because there were grounds for believing that the women in question had been born Muslims. In each case the sultan declared the girl to be free and repeated the marriage vow in her behalf before the Şeyhülislam, but did this without pomp. His nine wives were: Ayşe Kadın (died 1775, buried in New Mosque, Istanbul), Senior Consort; Ruhşah Kadın alias El-Hace Hatice (died 1808, buried in Tomb of Abdul Hamid I), Second Consort→Senior Consort; Hümaşah Kadın (died 1778, buried in New Mosque, Istanbul), Third Consort→Second Consort; Sineperver Sultan (died 11 December 1828, buried in Eyüp Sultan Mosque), Fourth Consort→Third Consort→Second Consort; Binnaz Kadın (died June 1823, buried in Tomb of Abdul Hamid I), Fifth Consort→Fourth Consort→Third Consort; Mehtabe Kadın, Fifth Consort→Fourth Consort; Mutebere Kadın (died 16 May 1837, buried in Tomb of Abdul Hamid I), Sixth Consort→Fifth Consort; Şebsefa Kadın (died 1805, buried in Şebsefa Kadın Mosque, Eminönü, Istanbul), Sixth Consort; Nakşidil Sultan (died 22 August 1817, buried in Nakşidil Sultan Mausoleum, Fatih Mosque, Istanbul), Seventh Consort; (A mythical legend claims her to have been Aimée du Buc de Rivéry, a distant cousin-in-law of Napoleon's wife, Empress Josephine); Sons His sons were: Mustafa IV (reigned 1807–08) – with Sineperver; Mahmud II (reigned 1808–39) – with Nakşidil; Şehzade Abdullah (10 January 1776 - 1849, died in Algeria); Şehzade Muhammed (22 August 1776 – 3 February 1781, buried in Tomb of Abdul Hamid I) – with Hümaşah; Şehzade Ahmed (12 December 1776 – 18 December 1778, buried in Tomb of Abdul Hamid I) – with Sineperver; Şehzade Abdurrahman (31 July 1777 – 2 August 1777); Şehzade Süleyman (13 March 1779 – 19 January 1786, buried in Tomb of Abdul Hamid I) - with Mutebere; Şehzade Abdülaziz (19 August 1779 – 19 August 1779) – with Ruhşah; Şehzade Mehmed Nusret (20 September 1782 – 23 October 1785) – with Şebsafa; Şehzade Seyfullah Murad (22 October 1783 – 21 January 1786, buried in Tomb of Abdul Hamid I) - with Nakşidil; Daughters His daughters were: Hatice Sultan (12 January 1776 – 8 November 1776, buried in New Mosque); Ayşe Sultan (30 July 1777 – 9 September 1777); Esma Sultan (16 July 1778 – 4 June 1848, buried in Tomb of Mahmud II) – with Sineperver, married 29 May 1792, Damat Küçük Hüseyin Pasha (died 8 January 1803), foster-sister of Sultan Selim III; Rabia Sultan (19 April 1780 – 28 June 1780, buried in Tomb of Abdul Hamid I); Aynışah Sultan (10 July 1780 – 28 July 1780, buried in Tomb of Abdul Hamid I); Melikşah Sultan (29 December 1780 – 1781, buried in Tomb of Abdul Hamid I); Rabia Sultan (10 August 1781 – 3 October 1782, buried in Tomb of Abdul Hamid I); Fatma Sultan (19 January 1782 – 11 January 1786, buried in Tomb of Abdul Hamid I) - with Sineperver; Alemşah Sultan (10 November 1784 – 10 March 1786, buried in Tomb of Abdul Hamid I) - with Şebsafa; Saliha Sultan (28 November 1786 – 10 April 1788, buried in Tomb of Abdul Hamid I) - with Nakşidil; Emine Sultan (4 February 1788 – 9 March 1791, buried in Tomb of Abdul Hamid I) – with Şebsafa; Hibetullah Sultan (16 March 1789 – 18 September 1841, buried in Tomb of Mahmud II) – with Şebsafa, married 3 February 1804, Damat Alaeddin Pasha (died at Scutari, January 1813), son of Damat Seyid Ahmed Pasha; Adopted daughters Abdul Hamid had adopted two daughters when he was a prince: Ahtermelek Hanım (1758 – 3-31 December 1785, buried in Eyüp Cemetery), married Mehmed Said Bey, son of Izzet Pasha; Dürrüşehvar Hanım (1760 – May 1826, buried in Nakşidil Sultan Mausoleum), married Ahmed Nazif Bey (killed 21 May 1789), son of Hacı Selim Agha; Death Abdul Hamid died on 7 April 1789, at the age of sixty-four, in Constantinople. He was buried in Bahcekapi, a tomb he had built for himself. He bred Arabian horses with great passion. One breed of Küheylan Arabians was named "Küheylan Abdülhamid" after him. References Sources External links [aged 64] 1725 births 1789 deaths 18th-century Ottoman sultans Ottoman people of the Ottoman–Persian Wars Turks of the Ottoman Empire People of the Russo-Turkish War (1768–1774)

2695

https://en.wikipedia.org/wiki/Abdur%20Rahman%20Khan

Abdur Rahman Khan

Abdur Rahman Khan GCSI (Pashto/Dari: ) (between 1840 and 1844 – 1 October 1901) was Emir of Afghanistan from 1880 to his death in 1901. He is known for uniting the country after years of internal fighting and negotiation of the Durand Line Agreement with British India. Abdur Rahman Khan was the first child and only son of Mohammad Afzal Khan, and grandson of Dost Mohammad Khan, founder of the Barakzai dynasty. Abdur Rahman Khan re-established the writ of the Afghan government after the disarray that followed the second Anglo-Afghan war. He became known as The Iron Amir, because his government was a military despotism. This despotism rested upon a well-appointed army and administered through officials absolutely subservient to an inflexible will and controlled by a widespread system of espionage. The nickname, The Iron Amir, is also associated due to his victory over a number of rebellions by various tribes who were led by his relatives. One source says that during his reign there were over 40 rebellions throughout his rule. Abdur Rahman Khan's rule was termed by one British official as a "reign of terror", as he was absolutely despotic and had up to 100,000 people judicially executed during his 21 years as Emir. Thousands more starved to death, caught deadly diseases and died, were massacred by his army, or were killed during his forceful migrations of tribes. However, he was perhaps the greatest military genius Afghanistan ever produced. Early life Abdul Rahman Khan was born in Kabul in 1844. He spent most of his youth in Balkh with his father, Mohammad Afzal Khan. Abdul Rahman learned conventional warfare tactics from the Anglo-Indian soldier William Campbell. Background and early career Before his death in Herat, on 9 June 1863, Abdur Rahman's grandfather, Dost Mohammad Khan, nominated his third son, Sher Ali Khan, as his successor, passing over the two elder brothers, Afzal Khan and Azam Khan. At first, the new Amir was quietly recognized. But after a few months, Afzal Khan raised an insurrection in the north of the country, where he had been governing when his father died. This began a fierce internecine conflict for power between Dost Mohammad's sons, which lasted for nearly five years. The Musahiban are descendants of Dost Mohammad Khan's older brother, Sultan Mohammad Khan. Described by the American scholar and explorer Eugene Schuyler as "a tall well-built man, with a large head, and a marked Afghan, almost Jewish, face", Abdur Rahman distinguished himself for his ability and energetic daring. Although his father, Afzal Khan came to terms with the Amir Sher Ali, Abdur's behaviour in the northern province soon excited the Amir's suspicion and, when he was summoned to Kabul, fled across the Oxus into Bukhara. Sher Ali threw Afzal Khan into prison, and a revolt followed in southern Afghanistan. The Amir had scarcely suppressed it by winning a desperate battle when Abdur Rahman's reappearance in the north was a signal for a mutiny by troops stationed in those parts and a gathering of armed bands to his standard. After some delay and desultory fighting, he and his uncle, Azam Khan, occupied Kabul in March 1866. The Amir Sher Ali marched up against them from Kandahar; but in the battle that ensued at Sheikhabad on 10 May, he was deserted by a large body of his troops, and after his signal defeat Abdur Rahman released his father, Afzal Khan, from prison in Ghazni, and installed him upon the throne as Amir of Afghanistan. Notwithstanding the new Amir's incapacity, and some jealousy between the real leaders, Abdur Rahman and his uncle, they again routed Sher Ali's forces, and occupied Kandahar in 1867. When Afzal Khan died at the end of the year, Azam Khan became the new ruler, with Abdur Rahman installed as governor in the northern province. But towards the end of 1868, Sher Ali's return and a general rising in his favour resulted in Abdur Rahman and Azam Khan's defeat at Tinah Khan on 3 January 1869. Both sought refuge to the east in Central Asia, where Abdur Rahman placed himself under Russian protection at Samarkand. Azam died in Kabul in October 1869. Exile and negotiated return to power Abdur Rahman lived in exile in Tashkent. He was one of the most powerful opponents of the British. He was being told to cross the Oxus and claim throne for Amir. In March 1880, a report reached India that Abdur Rahman was in northern Afghanistan; and the Governor-General, Lord Lytton, opened communications with him to the effect that the British government were prepared to withdraw their troops, and to recognize Abdur Rahman as Amir of Afghanistan, with the exception of Kandahar and some districts adjacent to it. After some negotiations, and an interview with Lepel Griffin, the diplomatic representative at Kabul of the Indian government. Griffin described Abdur Rahman as a man of middle height, with an exceedingly intelligent face and frank and courteous manners, shrewd and able in conversation on the business in hand. Reign At the durbar on 22 July 1880, Abdur Rahman was officially recognized as Amir, granted assistance in arms and money, and promised, in case of unprovoked foreign aggression, such further aid as might be necessary to repel it, provided that he align his foreign policy with the British. The British evacuation of Afghanistan was settled on the terms proposed, and in 1881, the British troops also handed over Kandahar to the new Amir. However, Ayub Khan, one of Sher Ali Khan's sons, marched upon that city from Herat, defeated Abdur Rahman's troops, and occupied the place in July 1880. This serious reverse roused the Amir, who had not displayed much activity. Instead, Ayub Khan was defeated in Kandahar by the British General Frederick Roberts on 1 September 1880. Ayub Khan was forced to flee into Persia. From that time Abdur Rahman was fairly seated firm on the throne at Kabul, thanks to the unwavering British protections in terms of giving large supplies of arms and money. In the course of the next few years, Abdul Rahman consolidated his grip over all Afghanistan, suppressing insurrection by a relentless and brutal use of his despotic authority. The powerful Ghilzai revolted against the severity of his measures several times. In that same year, Ayub Khan made a fruitless inroad from Persia. In 1885, at the moment when the Amir was in conference with the British viceroy, Lord Dufferin, in India, the news came of a skirmish between Russian and Afghan troops at Panjdeh, over a disputed point in the demarcation of the northwestern frontier of Afghanistan. Abdur Rahman's attitude at this critical juncture is a good example of his political sagacity. To one who had been a man of war from his youth, who had won and lost many fights, the rout of a detachment and the forcible seizure of some debatable frontier lands was an untoward incident; but it was not a sufficient reason for calling upon the British, although they had guaranteed his territory's integrity, to vindicate his rights by hostilities which would certainly bring upon him a Russian invasion from the north, and would compel his British allies to throw an army into Afghanistan from the southeast. He also published his autobiography in 1885, which served more as an advice guide for princes than anything else. His interest lay in keeping powerful neighbours, whether friends or foes, outside his kingdom. He knew this to be the only policy that would be supported by the Afghan nation; and although for some time a rupture with Russia seemed imminent, while the Government of India made ready for that contingency, the Amir's reserved and circumspect tone in the consultations with him helped to turn the balance between peace and war, and substantially conduced towards a pacific solution. Abdur Rahman left on those who met him in India the impression of a clear-headed man of action, with great self-reliance and hardihood, not without indications of the implacable severity that too often marked his administration. His investment with the insignia of the highest grade of the Order of the Star of India appeared to give him much pleasure. His adventurous life, his forcible character, the position of his state as a barrier between the Indian and the Russian empires, and the skill with which he held the balance in dealing with them, combined to make him a prominent figure in contemporary Asian politics and will mark his reign as an epoch in the history of Afghanistan. The Amir received an annual subsidy from the British government of 1,850,000 rupees. He was allowed to import munitions of war. He succeeded in imposing an organized government upon the fiercest and most unruly population in Asia; he availed himself of European inventions for strengthening his armament, while he sternly set his face against all innovations which, like railways and telegraphs, might give Europeans a foothold within his country. He also built himself several summer and guest houses, including the Bagh-e Bala Palace and Chihil Sutun Palace in Kabul, and the Jahan Nama Palace in Kholm. The Amir found himself unable, by reason of ill-health, to accept an invitation from Queen Victoria to visit England; but his second son Nasrullah Khan, the crown prince, went instead. Durand Line In 1893, Mortimer Durand was deputed to Kabul by the government of British India for this purpose of settling an exchange of territory required by the demarcation of the boundary between northeastern Afghanistan and the Russian possessions, and in order to discuss with Amir Abdur Rahman Khan other pending questions. Abdur Rahman Khan showed his usual ability in diplomatic argument, his tenacity where his own views or claims were in debate, with a sure underlying insight into the real situation. In the agreement that followed relations between the British Indian and Afghan governments, as previously arranged, were confirmed; and an understanding was reached upon the important and difficult subject of the border line of Afghanistan on the east, towards India. A Royal Commission was set up to determine the boundary between Afghanistan and British-governed India, and was tasked to negotiate terms for agreeing to the Durand Line, between the two parties camped at Parachinar, now part of FATA Pakistan, which is near Khost, Afghanistan. From the British side the camp was attended by Mortimer Durand and Sahibzada Abdul Qayyum, British Political Agent in Khyber. Afghanistan was represented by Sahibzada Abdul Latif and the Governor Sardar Shireendil Khan representing Amir Abdur Rahman Khan. In 1893, Mortimer Durand negotiated with Abdur Rahman Khan the Durand Line Treaty for the demarcation of the frontier between Afghanistan, the FATA, North-West Frontier Province and Baluchistan, now provinces of Pakistan as a successor state of British India. In 1905, Amir Habibullah Khan signed a new agreement with the United Kingdom which confirmed the legality of the Durand Line. Similarly, the legality of the Durand Line was once again confirmed by King Amanullah Khan through the Treaty of Rawalpindi in 1919. The Durand Line was once again recognised as international border between Pakistan and Afghanistan by Sardar Mohammed Daoud Khan (former prime minister and later president of Afghanistan) during his visit to Pakistan in August 1976. Dictatorship and the "Iron Amir" Abdur Rahman Khan's government was a military despotism resting upon a well-appointed army; it was administered through officials absolutely subservient to an inflexible will and controlled by a widespread system of espionage; while the exercise of his personal authority was too often stained by acts of unnecessary cruelty. He held open courts for the receipt of petitioners and the dispensation of justice; and in the disposal of business he was indefatigable. In the 1880s, the "Iron Emir" decided to strategically displace some members of different ethnic groups in order to bring better security. For example, he "uprooted troublesome Durrani and Ghilzai Pashtun tribes and transported them to Uzbek and Tajik populated areas in the north, where they could spy on local Dari-speaking, non-Pashtun ethnic groups and act as a screen against further Russian encroachments on Afghan territory." From the end of 1888, the Amir spent eighteen months in his northern provinces bordering upon the Oxus, where he was engaged in pacifying the country that had been disturbed by revolts, and in punishing with a heavy hand all who were known or suspected to have taken any part in rebellion. In 1895–1896, Abdur Rahman directed the invasion of Kafiristan and the conversion of its indigenous peoples to Islam. The region was subsequently renamed Nuristan. In 1896, he adopted the title of Zia-ul-Millat-Wa-ud Din ("Light of the nation and religion"), and his zeal for the cause of Islam induced him to publish treatises on jihad. Chitral, Yarkand and Ferghana became shelters for refugees in 1887 and 1883 from Badakhshan who fled from the campaigns of Abdul Rahman. 1888-1893 Uprisings of Hazaras In the early 1890s some Hazara tribes revolted against Abdur Rahman. In 1888, the Amir's cousin, Ishak Khan, rebelled against him in the north; and also the Ghilzais (Hotakis, Tokhis and Andaris) revolted against him in 1887; but these enterprises came to nothing. As the Kabul Newsletters written by the British agents indicate, Abdur Rahman was an extremely ruthless man. He has been called 'The Dracula Amir' by some writers. According to Syed Askar Mousavi, after the crushing of the Hazara Uprising "thousands of Hazara men, women, and children were sold as slaves in the markets of Kabul and Qandahar, while numerous towers of Hazara heads were made from the defeated rebels as a warning to others who might challenge the rule of the Iron Amir." Due to Amir's depredations, around 62 percents of Hazara had been mascaraed and some other Hazaras migrated to Quetta in Balochistan, while smaller number moved to Mashhad in northeastern Iran. Abdur Rahman Khan's atrocious punishments were unusually heavy handed compared to his punishing of previous Pashtun rebellions of Ghilzais like (Hotakis, Tokhis and Andaris). While these aforementioned tribes' revolts were crushed, but since they shared the same ethnicity with the Amir, they did not suffer mass enslavement, which could be explained by their adhering to Shiism. Death and descendants Abdur Rahman died on 1 October 1901, inside his summer palace, being succeeded by his son Habibullah Khan who is the father of Amanullah Khan. Today, his descendants can be found in many places outside Afghanistan, such as in America, France, Germany, and even in Scandinavian countries such as Denmark. His two eldest sons, Habibullah Khan and Nasrullah Khan, were born at Samarkand. His youngest son, Mahomed Omar Jan, was born in 1889 of an Afghan mother, connected by descent with the Barakzai family. One of the Amir’s grandchildren, Azizullah Khan Ziai was the ambassador of Iran from 1930-1932, he was the son of Nasrullah Khan. One of the Amir’s most notable descendants is Prince Ali Seraj. Legacy Afghan society has mixed feelings about his rule. A majority of Pashtuns (his native ethnics) remember him as a ruler who initiated many programs for modernization, and effectively prevented the country from being occupied by Russia by using the "financial and advisory" support of British Empire during the Great Game. The Emir was effectively dependent on British arms and money to stay in power. Honours and awards Honorary Grand Commander of the Most Exalted Order of the Star of India, 11 April 1885 Honorary Grand Cross of the Most Honourable Order of the Bath (civil division), 29 December 1893 Writings Pandnamah-i dunya va din (Advice on the worldly life and religion), 1883. Autobiography. Risalah-i Khirad’namah-i Amiri (Epistle of princely wisdom), 1886. On the notion of aql or intellect in Islam. Risalah-i najiyah, 1889. On the importance of jihad in the Qur’an and hadith. Taj al-Tavarikh (Crown of histories), 1904, Autobiography in 2 volumes. In popular culture In the film Kesari, Abdur Rahman is briefly mentioned. See also European influence in Afghanistan Lillias Hamilton (court physician to Amir Abdur Rahman Khan in the 1890s) List of monarchs of Afghanistan Pashtun colonization of northern Afghanistan Notes References Further reading Embree, Ainslee T. ed. Encyclopedia of Asian history (4 vol. 1988) 1:5. External links 1844 births 1901 deaths 19th-century Afghan monarchs 20th-century Afghan monarchs Emirs of Afghanistan Barakzai dynasty Durand line Pashtun people Honorary Knights Grand Commander of the Order of the Star of India Honorary Knights Grand Cross of the Order of the Bath 19th-century Afghan politicians 19th-century monarchs in Asia 20th-century Afghan politicians Genocide perpetrators

2696

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

Abencerrages

The Abencerrages or Abencerrajes (from the Arabic for "Saddler's Son") were a family or faction that is said to have held a prominent position in the Kingdom of Granada in the 15th century. The name appears to have been derived from Yussuf ben-Serragh, the head of the tribe in the time of Muhammed VII, Sultan of Granada (1370–1408), who did that sovereign good service in his struggles to retain the crown of which he was three times deprived. Little is known of the family with certainty. The Chambers Biographical Dictionary records that they arrived in Spain in the 8th century but the name is familiar from the romance by Ginés Pérez de Hita, Guerras civiles de Granada, which celebrates the feuds of the Abencerrages and the rival family of the Benedin (Arabic banu Edin), and the cruel treatment to which the former were subjected. J. P. de Florian's Gonsalve de Cordoue and Chateaubriand's Le dernier des Abencerrages are adaptations of Pérez de Hita's story. The story is told that one of the Abencerrages, having fallen in love with a lady of the royal family, was caught in the act of climbing up to her window. The assassinations were ordered by Ibrahim Benedin, who had a feud with the family. He was enraged and shut up the whole family in one of the halls of the Alhambra, and gave orders to kill them all. The apartment where this is said to have taken place is one of the most beautiful courts of the Alhambra, and is still called the Hall of the Abencerrages. Washington Irving in Tales of the Alhambra (1832) disagrees, saying the massacre was a fiction, but that a number of Abencerrages were killed in one of the battles at the time. Nonetheless, many poems and plays, the novella The Abencerraje and two operas (Les Abencérages, by Luigi Cherubini, and L'esule di Granata, by Giacomo Meyerbeer) mention the legend. Notes External links The Abencerrages–Part 17 of Washington Irving's Tales of the Alhambra Nasrid dynasty

2699

https://en.wikipedia.org/wiki/Aberavon%20%28UK%20Parliament%20constituency%29

Aberavon (UK Parliament constituency)

Aberavon (Welsh: Aberafan) is a constituency represented in the House of Commons of the Parliament of the United Kingdom since 2015 by Stephen Kinnock of the Welsh Labour Party. It includes the town of Aberavon, although the largest town in the constituency is Port Talbot. History The constituency was created for the 1918 general election by the dividing of the Swansea District. With the exception of the first term, it has always been held by the Labour Party. Ramsay MacDonald, who became Labour's first Prime Minister in 1924, held the seat from 1922 to 1929. Its current MP, Stephen Kinnock, is the son of Neil Kinnock, who was Labour leader and Leader of the Opposition from 1983 to 1992. It is one of the most consistently safe seats for Labour; since the end of the Second World War, the Labour candidate has always won Aberavon with a majority at least 33%, and with the exception of 2015, the Labour candidate has also always won an overall majority of the vote in the seat. In 2015, Kinnock only won 48.9% of the vote in Aberavon, against a surge in the vote for the UKIP candidate; however, in 2017, Kinnock's vote share rose by 19.2 percentage points, the biggest increase in the Labour vote in the seat's history, and his majority increased to 50.4%, the highest for an Aberavon MP since 2001. The 2017 result also made Aberavon the safest Labour seat in Wales, however the seat saw a significant swing against Labour in 2019. Boundaries 1918–1950: The Borough of Aberavon, the Urban Districts of Briton Ferry, Glencorwg, Margam, and Porthcawl, and part of the Rural Districts of Neath and Penybont. 1950–1983: The Borough of Port Talbot, the Urban Districts of Glyncorrwg and Porthcawl, and part of the Rural District of Penybont. 1983–1997: The Borough of Afan, and the Borough of Neath wards nos. 3 and 6. 1997–2010: The Borough of Port Talbot, and the Borough of Neath wards of Briton Ferry East, Briton Ferry West, Coedffranc Central, Coedffranc North and Coedffranc West. 2010–present: The Neath Port Talbot County Borough electoral divisions of Aberavon, Baglan, Briton Ferry East, Briton Ferry West, Bryn and Cwmavon, Coedffranc Central, Coedffranc North, Coedffranc West, Cymmer, Glyncorrwg, Gwynfi, Margam, Port Talbot, Sandfields East, Sandfields West, and Tai-bach. The constituency is in South Wales, situated on the right bank of the River Afan, near its mouth in Swansea Bay. Commenting on the 1983 boundary changes to the constituency when moving the 2000 Loyal Address of the Blair Government in Parliament, the seat's then-MP Sir John Morris, who would retire at the next general election, said: Members of Parliament Elections Elections in the 1910s Jones withdrew in favour of Edwards on 13 December 1918. Elections in the 1920s Elections in the 1930s Elections in the 1940s Elections in the 1950s Elections in the 1960s Elections in the 1970s Elections in the 1980s Elections in the 1990s Elections in the 2000s Elections in the 2010s Of the 44 rejected ballots: 29 were either unmarked or it was uncertain who the vote was for. 14 voted for more than one candidate. 1 had writing or mark by which the voter could be identified. Of the 57 rejected ballots: 37 were either unmarked or it was uncertain who the vote was for. 20 voted for more than one candidate. Of the 57 rejected ballots: 41 were either unmarked or it was uncertain who the vote was for. 16 voted for more than one candidate. Of the 82 rejected ballots: 61 were either unmarked or it was uncertain who the vote was for. 19 voted for more than one candidate. 2 had writing or mark by which the voter could be identified. See also Aberavon (Senedd constituency) List of Parliamentary constituencies in West Glamorgan List of Parliamentary constituencies in Wales References External links Politics Resources (election results from 1922 onwards) Electoral Calculus (election results from 1955 onwards) 2017 Election House Of Commons Library 2017 Election report A Vision Of Britain Through Time (constituency elector numbers) Further reading Parliamentary constituencies in South Wales Politics of Neath Port Talbot Constituencies of the Parliament of the United Kingdom established in 1918 Constituencies of the Parliament of the United Kingdom represented by a sitting Prime Minister

2700

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

Abercarn

Abercarn is a small town and community in Caerphilly county borough, Wales. It is 10 miles (16 km) northwest of Newport on the A467 between Cwmcarn and Newbridge, within the historic boundaries of Monmouthshire. History An estate at Abercarn was owned by the ironmaster Richard Crawshay; in 1808, it passed to his son-in-law, the industrialist and politician Benjamin Hall. The district was traditionally associated with the coal mining collieries, ironworks and tinplate works of the South Wales coalfield and South Wales Valleys, although all have now closed; the town, which lies in the middle portion of the Ebbw valley, being situated on the south-eastern flank of the once great mining region of Glamorgan and Monmouthshire. On 11 September 1878, an underground explosion at the Prince of Wales Colliery killed 268 coal miners. Local government The area was part of the ancient Monmouthshire parish of Mynyddislwyn until the late 19th century. In 1892 a local board of health and local government district of Abercarn was formed. This became Abercarn urban district in 1894, governed by an urban district council of twelve members. Under the Local Government Act 1972 the urban district was abolished in 1974, becoming part of the borough of Islwyn, Gwent. Further local government organisation in 1996 placed the area in the county borough of Caerphilly. The former urban district corresponds to the three communities of Abercarn, Crumlin and Newbridge. Sport Abercarn is home to Abercarn Rugby Club which is a member of the Welsh Rugby Union, and to Abercarn United Football Club which plays in division one of the Gwent County League. Transport Bus The town is served by Stagecoach South Wales services including: X15 (from Newport to Brynmawr) 151 gold (from Newport to Blackwood Interchange) Rail The town is lies between Newbridge railway station and Crosskeys railway station, with the latter is slightly the closer of the two. Both are approximately a four-minute drive or thirty minute walk away. The town was formerly served by Abercarn railway station, which closed to passengers in April 1962. Military Following the formation of the Territorial Force in 1908, the Abercarn Territorial Cadet Company was formed within the wider Army Cadet Force. Following its formation the company was assigned to the 2nd Battalion, Monmouthshire Regiment. In 1912 the company was affiliated with the new formed 1st Cadet Battalion, The Monmouthshire Regiment. Notable people The surgeon Sir Clement Price Thomas (1893–1973) was born in Abercarn. He was famous for his 1951 operation on King George VI. References Towns in Caerphilly County Borough Local Government Districts created by the Local Government Act 1858 Communities in Caerphilly County Borough

2701

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

Aberdare

Aberdare ( ; ) is a town in the Cynon Valley area of Rhondda Cynon Taf, Wales, at the confluence of the Rivers Dare (Dâr) and Cynon. Aberdare has a population of 39,550 (mid-2017 estimate). Aberdare is south-west of Merthyr Tydfil, north-west of Cardiff and east-north-east of Swansea. During the 19th century it became a thriving industrial settlement, which was also notable for the vitality of its cultural life and as an important publishing centre. Etymology The name Aberdare translates as "mouth/confluence of the river dare", a reference to the Dare river () flowing into the Cynon () near an area known as "Yr Ynys". Dâr is an archaic Welsh word for oak, and the river Dâr may have been associated with Daron, an ancient Celtic goddess of oak. As such, the town would share an etymology with Aberdaron and the Daron river. As with many Welsh toponyms, it is likely that the locality was known by this name long before the development of the town History Early history There are several cairns and the remains of a circular British encampment on the mountain between Aberdare and Merthyr. This may have led to the mountain itself being named Bryn-y-Beddau (hill of graves) although other local traditions associate the name with the Battle of Hirwaun Wrgant. Middle Ages The area is traditionally given as the scene of the battle of Hirwaun Wrgant, where the allied forces of the Norman Robert Fitzhamon and Iestyn ap Gwrgant, the last Welsh prince of Glamorgan defeated Rhys ap Tewdwr, prince of Dyfed. The battle is thought to have started at Aberdare, with the areas now known as upper and lower Gadlys (The battle Court(s)), traditionally given as each armies' headquarters. The settlement of Aberdare dates from at least this period, with the first known reference being in a monastic chapter of 1203 concerning grazing right on Hirwaun Common. It was originally a small village in an agricultural district, centred around the Church of St John the Baptist, said to date from at least 1189. By the middle of the 15th century, Aberdare contained a water mill in addition to a number of thatched cottages, of which no evidence remains. Industrial Aberdare Aberdare grew rapidly in the early nineteenth century through two major industries: first iron, then coal. A branch of the Glamorganshire Canal (1811) was opened to transport these products; then the railway became the main means of transport to the South Wales coast. From the 1870s onwards, the economy of the town was dominated by the coal mining industry, with only a small tinplate works. There were also several brickworks and breweries. During the latter half of the 19th century, considerable improvements were made to the town, which became a pleasant place to live, despite the nearby collieries. A postgraduate theological college opened in connection with the Church of England in 1892, but in 1907 it moved to Llandaff. With the ecclesiastical parishes of St Fagan's (Trecynon) and Aberaman carved out of the ancient parish, Aberdare had 12 Anglican churches and one Catholic church, built in 1866 in Monk Street near the site of a cell attached to Penrhys monastery; and at one time there were over 50 Nonconformist chapels (including those in surrounding settlements such as Cwmaman and Llwydcoed). The services in the majority of the chapels were in Welsh. Most of these chapels have now closed, with many converted to other uses. The urban district includes what were once the separate villages of Aberaman, Abernant, Cwmaman, Cwmbach, Cwmdare, Llwydcoed, Penywaun and Trecynon. Population growth In 1801, the population of the parish of Aberdare was just 1,486, but the early 19th century saw rapid industrial growth, first through the ironworks, and later through the iron and steam coal industries. By the 1840's the parish population was increasing by 1,000 people every year, almost exclusively migrant workers from west Wales, which was suffering from an agricultural depression. This growth was increasingly concentrated in the previously agricultural areas of Blaengwawr and Cefnpennar to the south of the town. The population of the Aberdare District (centred on the town) was 9,322 in 1841, 18,774 in 1851, and 37,487 in 1861. Despite a small decline in the 1870s, population levels continued to increase, with the first decade of the 20th century seeing a notably sharp increase, largely as a result of the steam coal trade, reaching 53,779 in 1911. The population has since declined owing to the loss of most of the heavy industry. The Aberdare population at the 2001 census was 31,705 (ranked 13th largest in Wales). By 2011 it was 29,748, though the figure includes the surrounding populations of Aberaman, Abercwmboi, Cwmbach and Llwydcoed. 21st century On 1 December 2016, following The Rhondda Cynon Taf (Communities) Order 2016, the community of Aberdare was split into two new communities, Aberdare East and Aberdare West. These are coterminous with the electoral wards of the same names. Aberdare East includes Aberdare town centre and the village of Abernant. Aberdare West includes Cwmdare, Cwm Sian and Trecynon. Language Welsh was the prominent language until the mid 20th century and Aberdare was an important centre of Welsh language publishing. A large proportion of the early migrant population were Welsh speaking, and in 1851 only ten per cent of the population had been born outside of Wales. In his controversial evidence to the 1847 Inquiry into the State of Education in Wales - the report of which is known in Wales as the Brad y Llyfrau Gleision (Treason of the Blue Books), the Anglican vicar of Aberdare, John Griffith, stated that the English language was "generally understood" and referred to the arrival of people from anglicised areas such as Radnorshire and south Pembrokeshire. Griffith also made allegations about the Welsh speaking population and what he considered to be the degraded character of the women of Aberdare, alleging sexual promiscuity was an accepted social convention, that drunkenness and improvidence amongst the miners was common and attacking what he saw as exaggerated emotion in the religious practices of the Nonconformists. This evidence helped inform the findings of the report which would go on to stigmatise Welsh people as "ignorant", "lazy" and "immoral" and found the reason for this was the continued use of the Welsh language, which it described as "evil". The controversial reports allowed the local non-conformist minister Thomas Price of Calfaria to arrange public meetings, from which he would emerge as a leading critic of the vicar's evidence and, by implication, a defender of both the Welsh language and the morality of the local population, It is still contended that Griffiths was made vicar of Merthyr in the neighbouring valley to escape local anger, even though it was over ten years before he left Aberdare. The reports and subsequent defence would maintain the perceptions of Aberdare, the Cynon Valley and even the wider area as proudly nonconformist and defiantly Welsh speaking throughout its industrialised history. By 1901, the census recorded that 71.5% of the population of Aberdare Urban District spoke Welsh, but this fell to 65.2% in 1911. The 1911 data shows that Welsh was more widely spoken among the older generation compared to the young, and amongst women compared to men. A shift in language was expedited with the loss of men during the First World War and the resulting economic turmoil. English gradually began to replace Welsh as the community language, as shown by the decline of the Welsh language press in the town. This pattern continued after the Second World War despite the advent of Welsh medium education. Ysgol Gymraeg Aberdâr, the Welsh-medium primary school, was established in the 1950s with Idwal Rees as head teacher. According to the 2011 Census, 11.6% of Aberdare residents aged three years and over can speak Welsh, with 24.8% of 3- to 15-year-olds stating that they can speak it. Industry Iron Industry Ironworks were established at Llwydcoed and Abernant in 1799 and 1800 respectively, followed by others at Gadlys and Aberaman in 1827 and 1847. The iron industry began to expand in a significant way around 1818 when the Crawshay family of Merthyr purchased the Hirwaun ironworks and place them under independent management. In the following year, Rowland Fothergill took over the ironworks at Abernant and a few years later did the same at Llwydcoed. Both concerns later fell into the hands of his nephew Richard Fothergill. The Gadlys Ironworks was established in 1827 by Matthew Wayne, who had previously managed the Cyfarthfa ironworks at Merthyr. The Gadlys works, now considered an important archaeological site, originally comprised four blast furnaces, inner forges, rowing mills and puddling furnaces. The development of these works provided impetus to the growth of Aberdare as a nucleated town. The iron industry was gradually superseded by coal and all the five iron works had closed by 1875, as the local supply of iron ore was inadequate to meet the ever-increasing demand created by the invention of steel, and as a result the importing of ore proved more profitable. Coal industry The iron industry had a relatively small impact upon the economy of Aberdare and in 1831 only 1.2% of the population was employed in manufacturing, as opposed to 19.8% in neighbouring Merthyr Tydfil. In the early years of Aberdare's development, most of the coal worked in the parish was coking coal, and was consumed locally, chiefly in the ironworks. Although the Gadlys works was small in comparison with the other ironworks it became significant as the Waynes also became involved in the production of sale coal. In 1836, this activity led to the exploitation of the "Four-foot Seam" of high-calorific value steam coal began, and pits were sunk in rapid succession. In 1840, Thomas Powell sank a pit at Cwmbach, and during the next few years he opened another four pits. In the next few years, other local entrepreneurs now became involved in the expansion of the coal trade, including David Williams at Ynysgynon and David Davis at Blaengwawr, as well as the latter's son David Davis, Maesyffynnon. They were joined by newcomers such as Crawshay Bailey at Aberaman and, in due course, George Elliot in the lower part of the valley. This coal was valuable for steam railways and steam ships, and an export trade began, via the Taff Vale Railway and the port of Cardiff. The population of the parish rose from 6,471 in 1841 to 14,999 in 1851 and 32,299 in 1861 and John Davies described it as "the most dynamic place in Wales". In 1851, the Admiralty decided to use Welsh steam coal in ships of the Royal Navy, and this decision boosted the reputation of Aberdare's product and launched a huge international export market. Coal mined in Aberdare parish rose from in 1844 to in 1850, and the coal trade, which after 1875 was the chief support of the town, soon reached huge dimensions. The growth of the coal trade inevitably led to a number of industrial disputes, some of which were local and others which affected the wider coalfield. Trade unionism began to appear in the Aberdare Valley at intervals from the 1830s onwards but the first significant manifestation occurred during the Aberdare Strike of 1857–8. The dispute was initiated by the depression in trade which followed the Crimean War and saw the local coal owners successfully impose a reduction in wages. The dispute did, however, witness an early manifestation of mass trade unionism amongst the miners of the valley and although unsuccessful the dispute saw the emergence of a stronger sense of solidarity amongst the miners. Steam coal was subsequently found in the Rhondda and further west, but many of the great companies of the Welsh coal industry's Gilded Age started operation in Aberdare and the lower Cynon Valley, including those of Samuel Thomas, David Davies and Sons, Nixon's Navigation and Powell Duffryn. During the early years of the twentieth century, the Aberdare valley became the focus of increased militancy among the mining workforce and an unofficial strike by 11,000 miners in the district from 20 October 1910 unyil 2 February 1911 attracted much attention at the time, although it was ultimately overshadowed by the Cambrian dispute in the neighbouring Rhondda valley which became synonymous with the so-called Tonypandy Riots. In common with the rest of the South Wales coalfield, Aberdare's coal industry commenced a long decline after World War I, and the last two deep mines still in operation in the 1960s were the small Aberaman and Fforchaman collieries, which closed in 1962 and 1965 respectively. On 11 May 1919, an extensive fire broke out on Cardiff Street, Aberdare. With the decline of both iron and coal, Aberdare has become reliant on commercial businesses as a major source of employment. Its industries include cable manufacture, smokeless fuels, and tourism. Government As a small village in the upland valleys of Glamorgan, Aberdare did not play any significant part in political life until its development as an industrial settlement. It was part of the lordship of Miskin, and the ancient office of High Constable continued in ceremonial form until relatively recent times. Parliamentary elections In 1832, Aberdare was removed from the county of Glamorgan and became part of the parliamentary borough of Merthyr Tydfil. For much of the nineteenth century, the representation was initially controlled by the ironmasters of Merthyr, notably the Guest family. From 1852 until 1868 the seat was held by Henry Austen Bruce whose main industrial interests lay in the Aberdare valley. Bruce was a Liberal but was viewed with suspicion by the more radical faction which became increasingly influential within Welsh Liberalism in the 1860s. The radicals supported such policies as the disestablishment of the Church of England and were closely allied to the Liberation Society. 1868 general election Nonconformist ministers played a prominent role in this new politics and, at Aberdare, they found an effective spokesman in the Rev Thomas Price minister of Calfaria, Aberdare. Following the granting of a second parliamentary seat to the borough of Merthyr Tydfil in 1867, the Liberals of Aberdare sought to ensure that a candidate from their part of the constituency was returned alongside the sitting member, Henry Austen Bruce. Their choice fell upon Richard Fothergill, owner of the ironworks at Abernant, who was enthusiastically supported by the Rev Thomas Price. Shortly before the election, however, Henry Richard intervened as a radical Liberal candidate, invited by the radicals of Merthyr. To many people's surprise, Price was lukewarm about his candidature and continued to support Fothergill. Ultimately, Henry Richard won a celebrated victory with Fothergill in second place and Bruce losing his seat. Richard thus became one of the-first radical MPs from Wales. 1874–1914 At the 1874 General Election, both Richard and Fothergill were again returned, although the former was criticised for his apparent lack of sympathy towards the miners during the industrial disputes of the early 1870s. This led to the emergence of Thomas Halliday as the first labour or working-class candidate to contest a Welsh constituency. Although he polled well, Halliday fell short of being elected. For the remainder of the nineteenth century, the constituency was represented by industrialists, most notably David Alfred Thomas. In 1900, however, Thomas was joined by Keir Hardie, the ILP candidate, who became the first labour representative to be returned for a Welsh constituency independent of the Liberal Party. Twentieth century The Aberdare constituency came into being at the 1918 election. The first representative was Charles Butt Stanton who had been elected at a by-election following Hardie's death in 1915. However, in 1922, Stanton was defeated by a Labour candidate and the party has held the seat ever since. The only significant challenge came from Plaid Cymru at the 1970 and February 1974 General Elections but this performance has not since been repeated. From 1984 until 2019 the parliamentary seat, now known as Cynon Valley was held by Ann Clwyd of Labour. Local government Until the mid-nineteenth century the local government of Aberdare and its locality remained in the hands of traditional structures such as the parish vestry and the High Constable, who was chosen on an annual basis. However, the rapid industrial development of the parsing resulted in the situation where these traditional bodies could not cope with the realities of an urbanised, industrial community which had developed without any planning or facilities. During the early decades of the century the iron masters gradually imposed their influence over local affairs and this remained the case following the formation of the Merthyr Board of Guardians in 1836. During the 1850s and early 1860s, however, as coal displaced iron as the main industry in the valley, the ironmasters were displaced as the dominant group in local government and administration by an alliance between mostly indigenous coal owners, shopkeepers and tradesmen, professional men and dissenting ministers. A central figure in this development was the Rev Thomas Price. The growth of this alliance was rooted in the reaction to the 1847 Education Reports and the subsequent efforts to establish a British School at Aberdare. In the 1840s there were no adequate sanitary facilities or water supply and life expectancy was low. Outbreaks of cholera and typhus were commonplace. Against this background, Thomas Webster Rammell prepared a report for the General Board of Health on the sanitary condition of the parish, which concluded that a Local Board of Health be established. This happened in 1854. Its first chairman was Richard Fothergill and the members included David Davis, Blaengwawr, David Williams (Alaw Goch), Rees Hopkin Rhys and the Rev. Thomas Price. It was followed by the Aberdare School Board in 1871. By 1889, the Local Board of Health had initiated a number of developments which included the purchase of local reservoirs from the Aberdare Waterworks Company for £97,000, a sewerage scheme costing £35,000, as well as the opening of Aberdare Public Park and a local fever hospital. The lack of a Free Library, however, remained a concern. Later, the formation of the Glamorgan County Council (upon which Aberdare had five elected members) in 1889, followed by the Aberdare Urban District Council, which replaced the Local Board in 1889, transformed the local politics of the Aberdare valley. At the 1889 Glamorgan County Council Elections most of the elected representatives were coalowners and industrialists and the only exception in the earlier period was the miners' agent David Morgan (Dai o'r Nant), elected in 1892 as a labour representative. From the early 1900s, however, Labour candidates began to gain ground and dominated local government from the 1920s onwards. The same pattern was seen on the Aberdare UDC. In 1974, following local government re-organization, Aberdare became part of the county of Mid Glamorgan and the Cynon Valley Borough Council. Labour members held a majority of seats on both authorities until their abolition in 1996. Since the latest re-organization, Aberdare has been part of the Rhondda Cynon Taff unitary authority. Once again, Labour has been the majority party although Plaid Cymru controlled the authority from 1999 until 2003. Since 1995 Aberdare has elected county councillors to Rhondda Cynon Taf County Borough Council. The town lies mainly in the Aberdare East ward, represented by two county councillors. Nearby Cwmdare, Llwydcoed and Trecynon are represented by the Aberdare West/Llwydcoed ward. Both wards have been represented by the Labour Party since 2012. Culture Aberdare, during its boom years, was considered a centre of Welsh culture: it hosted the first National Eisteddfod in 1861, with which David Williams (Alaw Goch) was closely associated. A number of local eisteddfodau had long been held in the locality, associated with figures such as William Williams (Carw Coch) The Eisteddfod was again held in Aberdare in 1885, and also in 1956 at Aberdare Park where the Gorsedd standing stones still exist. At the last National Eisteddfod held in Aberdare in 1956 Mathonwy Hughes won the chair. From the mid nineteenth century, Aberdare was an important publishing centre where a large number of books and journals were produced, the majority of which were in the Welsh language. A newspaper entitled Y Gwladgarwr (the Patriot) was published at Aberdare from 1856 until 1882 and was circulated widely throughout the South Wales valleys. From 1875 a more successful newspaper, Tarian y Gweithiwr (the Workman's Shield) was published at Aberdare by John Mills. Y Darian, as it was known, strongly supported the trade union movements among the miners and ironworkers of the valleys. The miners' leader, William Abraham, derived support from the newspaper, which was also aligned with radical nonconformist liberalism. The rise of the political labour movement and the subsequent decline of the Welsh language in the valleys, ultimately led to its decline and closure in 1934. The Coliseum Theatre is Aberdare's main arts venue, containing a 600-seat auditorium and cinema. It is situated in nearby Trecynon and was built in 1938 using miners' subscriptions. The Second World War poet Alun Lewis, was born near Aberdare in the village Cwmaman and there is a plaque commemorating him, including a quotation from his poem The Mountain over Aberdare. The founding members of the rock band Stereophonics originated from the nearby village of Cwmaman. It is also the hometown of guitarist Mark Parry of Vancouver rock band The Manvils. Famed anarchist-punk band Crass played their last live show for striking miners in Aberdare during the UK miners' strike. Griffith Rhys Jones − or Caradog as he was commonly known − was the Conductor of the famous 'Côr Mawr' of some 460 voices (the South Wales Choral Union), which twice won first prize at Crystal Palace choral competitions in London in the 1870s. He is depicted in the town's most prominent statue by sculptor Goscombe John, unveiled on Victoria Square in 1920. Aberdare was culturally twinned with the German town of Ravensburg. Religion Anglican Church The original parish church of St John the Baptist was originally built in 1189. Some of its original architecture is still intact. With the development of Aberdare as an industrial centre in the nineteenth century it became increasingly apparent that the ancient church was far too small to service the perceived spiritual needs of an urban community, particularly in view of the rapid growth of nonconformity from the 1830s onwards. Eventually, John Griffith, the rector of Aberdare undertook to raise funds to build a new church, leading to the rapid construction of St Elvan's Church in the town centre between 1851 and 1852. This Church in Wales church still stands the heart of the parish of Aberdare and has had extensive work since its erection. The church has a modern electrical, two-manual and pedal board pipe organ, that is still used in services. John Griffith, vicar of Aberdare, who built St Elvan's, transformed the role of the Anglican church in the valley by building a number of other churches, including St Fagan's, Trecynon. Other churches in the parish are St Luke's (Cwmdare), St James's (Llwydcoed) and St Matthew's Church (1891) (Abernant). In the parish of Aberaman and Cwmaman is St Margaret's Church, with an old, but beautiful, pipe organ with two manuals and a pedal board. Also in this parish is St Joseph's Church, Cwmaman. St Joseph's has recently undergone much recreational work, almost converting the church into a community centre. However, regular church services still take place. Here, there is a two-manual and pedal board electric organ, with speakers at the front and sides of the church. In 1910 there were 34 Anglican churches in the Urban District of Aberdare. A survey of the attendance at places of worship on a particular Sunday in that year recorded that 17.8% of worshippers attended church services, with the remainder attending nonconformist chapels. Nonconformity The Aberdare Valley was a stronghold of Nonconformity from the mid-nineteenth century until the inter-war years. In the aftermath of the 1847 Education Reports nonconformists became increasingly active in the political and educational life of Wales and in few places was this as prevalent as at Aberdare. The leading figure was Thomas Price, minister of Calfaria, Aberdare. Aberdare was a major centre of the 1904–05 Religious Revival, which had begun at Loughor near Swansea. The revival aroused alarm among ministers for the revolutionary, even anarchistic, impact it had upon chapel congregations and denominational organisation. In particular, it was seen as drawing attention away from pulpit preaching and the role of the minister. The local newspaper, the Aberdare Leader, regarded the revival with suspicion from the outset, objecting to the 'abnormal heat' which it engendered. Trecynon was particularly affected by the revival, and the meetings held there were sais to have aroused more emotion and excitement than the more restrained meetings in Aberdare itself. The impact of the revival was significant in the short term, but in the longer term was fairly transient. Once the immediate impact of the revival had faded, it was clear from the early twentieth century that there was a gradual decline in the influence of the chapels. This can be explained by several factors, including the rise of socialism and the process of linguistic change which saw the younger generation increasingly turn to the English language. There were also theological controversies such as that over the New Theology propounded by R.J. Campbell. Of the many chapels, few are still used for their original purpose and a number of closed since the turn of the millennium. Many have been converted for housing or other purposes (including one at Robertstown which has become a mosque), and others demolished. Among the notable chapels were Calfaria, Aberdare and Seion, Cwmaman (Baptist); Saron, Aberaman and Siloa, Aberdare (Independent); and Bethania, Aberdare (Calvinistic Methodist). Independents The earliest Welsh Independent, or Congregationalist chapel in the Aberdare area was Ebenezer, trecynon, although meetings had been held from the latter years of the eighteenth century in dwelling houses in the locality, for example at Hirwaun. During the nineteenth century, the Independents showed the biggest increases in terms of places of worship: from two in 1837 to twenty-five (four of them being English causes), in 1897. By 1910 there were 35 Independent chapels, with a total membership of 8,612. Siloa Chapel was the largest of the Independent chapels in Aberdare and is one of the few that remain open today, having been 're-established' as a Welsh language chapel. The Independent ministers of nineteenth-century Aberdare included some powerful personalities but none had the kind of wider social authority which Thomas Price enjoyed amongst the Baptists. Of the other Independent chapels in the valley Saron, in Davis Street, Aberaman, was used for regular services by a small group of members until 2011. For many years, these were held in a small side-room, and not the chapel itself. The chapel has a large vestry comprising rows of two-way-facing wooden benches and a stage, with a side entrance onto Beddoe Street and back entrance to Lewis Street. Although the building is not in good repair, the interior, including pulpit and balcony seating area (back & sides), was in good order but the chapel eventually closed due to the very small number of members remaining. In February 1999, Saron was made a Grade II Listed Building. Baptists The Baptists were the most influential of the nonconformist denominations in Aberdare and their development was led by the Rev. Thomas Price who came to Aberdare in the early 1840s as minister of Calfaria Chapel. In 1837 the Baptists had three chapels, but in 1897 there were twenty, seventeen of them being Welsh. By 1910 the number of chapels had increased to 30, with a total membership of 7,422. Most of these Baptist chapels were established under the influence of Thomas Price who encouraged members to establish branch chapels to attract migrants who flocked to the town and locality from rural Wales. The chapels came together for regular gatherings, including baptismal services which were held in the River Cynon As a result, Price exerted an influence in the religious life of the locality which was far greater than that of any other minister. Calvinistic Methodists By 1910 there were 24 Calvinistic Methodist chapels in the Aberdare Urban District with a total membership of 4,879. The most prominent of these was Bethania, Aberdare, once the largest chapel in Aberdare. Derelict for many years, it was demolished in 2015. The Methodists were numerically powerful and while some of their ministers such as William James of Bethania served on the Aberdare School Board and other public bodies, their constitution militated against the sort of active political action which came more naturally to the Baptists and Independents. Other denominations The other denominations were weaker, including the Wesleyan Methodists who had 14 places of worship by 1910. There was also a significant Unitarian tradition in the valley and three places of worship by 1910. Highland Place Unitarian Church celebrated its 150th anniversary in 2010, with a number of lectures on its history and the history of Unitarianism in Wales taking place there. The church has a two-manual pipe organ with pedal board that is used to accompany all services. The current organist is Grace Jones, the sister of the former organist Jacob Jones. The connected schoolroom is used for post-service meetings and socialising. Judaism Seymour Street was once home to a synagogue which opened its doors in the late 1800s and which closed in 1957. The site now has a blue plaque. Education The state of education in the parish was a cause for concern during the early industrial period as is illustrated by the reaction to the 1847 Education Reports. Initially, there was an outcry, led by the Rev Thomas Price against the comments made by the vicar of Aberdare in his submission to the commissioners. However, on closer reflection, the reports related the deficiencies of educational provision, not only in Aberdare itself but also in the communities of the valleys generally. In so doing they not only criticised the ironmasters for their failure to provide schools for workers' children but also the nonconformists for not establishing British Schools. At the ten schools in Aberdare there was accommodation for only 1,317 children, a small proportion of the population. Largely as a result of these criticisms, the main nonconformist denominations worked together to establish a British School, known locally as Ysgol y Comin, which was opened in 1848, accommodating 200 pupils. Funds were raised which largely cleared the debts and the opening of the school was marked by a public meeting addressed by Price and David Williams (Alaw Goch). Much energy was expended during this period on conflicts between Anglicans and nonconformists over education. The establishment of the Aberdare School Board in 1871 brought about an extension of educational provision but also intensified religious rivalries. School Board elections were invariably fought on religious grounds. Despite these tensions the Board took over a number of existing schools and established new ones. By 1889, fourteen schools were operated by the Board but truancy and lack of attendance remained a problem, as in many industrial districts. In common with other public bodies at the time (see 'Local Government' above), membership of the School Board was dominated by coal owners and colliery officials, nonconformist ministers, professional men and tradesmen. Only occasionally was an Anglican clergyman elected and, with the exception of David Morgan (Dai o'r Nant), no working class candidates were elected for more than one term. Colleges Coleg y Cymoedd Secondary schools Aberdare Community School St. John the Baptist School (Aberdare) Ysgol Gyfun Rhydywaun Transport The town is served by Aberdare railway station and Aberdare bus station, opposite each other in the town centre. The town has also been subject to an extensive redevelopment scheme during 2012–13. Sports Football The town has a thriving football scene with many grassroots clubs for both senior and junior players, while historically Aberdare Athletic F.C. were members of the Football League between 1921 and 1927 before being replaced by Torquay United after finishing bottom. The senior club folded a year later. They played their football league games at the Aberdare Athletic Ground where the current Ynys Stadium stands today. The reserve team carried on as Aberaman and Aberdare Athletic for one more season and were known as Aberaman Athletic F.C prior to being renamed as Aberdare Town. They play in the South Wales Alliance Premier League at Aberaman Park. Current football clubs in the area include: AFC Llwydcoed FC Cwmaman Hirwaun & Mackworth JFC Gadlys Rovers Juniors FC Cwmbach Royal Stars FC FC Abercwmboi Rugby Union CurrentRugby Union clubs in the area include: Aberdare Rugby Football Club - formed in 1890 which still play in Aberdare today at the Ynys Stadium. Abercwmboi RFC Hirwaun RFC Rugby League The Aberdare Athletic Ground was the venue of the first rugby league international, played between Wales and the New Zealand All Golds on New Year's Day 1908, which was won by the Welsh 9–8. Notable people See also :Category:People from Aberdare Notable current and former residents and natives of Aberdare include: Henry Austin Bruce – 1st Baron Aberdare & Home Secretary (1868–1873) Les Cartwright - Former Association Footballer and Wales international, played for Coventry City and Wrexham AFC Rose Davies – Labour politician and feminist Ian Evans – Former Rugby Union Player and Wales international, played for Ospreys and Bristol. Currently coaching at the Dragons Lyn Evans – particle physicist and project leader of the Large Hadron Collider Ioan Gruffudd – actor, born in Llwydcoed, Aberdare Patrick Hannan (presenter) – broadcaster David "Tarw" Jones – Dual code rugby international Alun Lewis – War poet Arthur Linton - cyclist Lee Lucas - Association Footballer, played for Swansea City and Motherwell. 'Big' Jim Mills (rugby league) – Wales & Great Britain rugby league international John Morgan – Canadian comedian, Royal Canadian Air Farce Mihangel Morgan – Welsh language writer, born in Trecynon, some of his literary works feature Aberdare Roy Noble – Welsh broadcaster, has lived near Aberdare for the past 30 years R. Ifor Parry – Congregationalist Minister and schoolteacher Jason Price - Former Association Footballer, played for Swansea City and Doncaster Rovers Thomas Price (Baptist minister) – Baptist Minister and radical politician Ieuan Rhys – actor, from Trecynon Rhys Hopkin Rhys – 19th century industrialist and prominent local figure Rhian Samuel – composer and professor of music Bethan Sayed – member of the Senedd for the South Wales (West) Region Stereophonics – all three original members, Kelly Jones, Richard Jones and Stuart Cable were brought up in Cwmaman, Aberdare Rees Thomas - Former Association Footballer, played for Cardiff City, Bournemouth & Boscombe Athletic and Portsmouth Jo Walton – fantasy novelist, now living in Montreal, Quebec David Young – rugby player and coach, raised in Penywaun See also List of twin towns and sister cities in the United Kingdom Aberdare Park References Sources Books Journals Newspapers Aberdare Leader Cardiff and Merthyr Guardian Online External sources BBC website on Aberdare Website of the Parish of St Fagans Aberdare External links www.geograph.co.uk : photos of Aberdare and surrounding area Towns in Rhondda Cynon Taf Former communities of Rhondda Cynon Taf

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Aberration

An aberration is something that deviates from the normal way. Aberration may also refer to: Optics and physics Optical aberration, an imperfection in image formation by an optical system Chromatic aberration, caused by differences in refractive index for different wavelengths of light, in contrast with monochromatic aberration, which occurs for all frequencies of light Spherical aberration, which occurs when light rays pass through a spherical lens near the edge Defocus aberration, which occurs when a system is out of focus Astronomical aberration, which produces an apparent motion of celestial objects Relativistic aberration, the distortion of light at high velocities Biology and medicine aberratio or aberration, a rare (mutant) butterfly or moth wing pattern. Chromosome abnormality, or aberration, a disruption in the normal chromosomal content of a cell Cardiac aberrancy, aberration of the conduction of action potentials in the electrical conduction system of the heart Entertainment Aberration, a DLC for the video game ARK: Survival Evolved Aberration (film), a horror movie Aberration (EP) Aberrations, or abbies, are human-like creatures in the American TV series Wayward Pines See also Aberrant, a superhero roleplaying game by White Wolf Game Studio Aberrancy (geometry), the non-circularity of a curve

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Aberration (astronomy)

In astronomy, aberration (also referred to as astronomical aberration, stellar aberration, or velocity aberration) is a phenomenon which produces an apparent motion of celestial objects about their true positions, dependent on the velocity of the observer. It causes objects to appear to be displaced towards the direction of motion of the observer compared to when the observer is stationary. The change in angle is of the order of v/c where c is the speed of light and v the velocity of the observer. In the case of "stellar" or "annual" aberration, the apparent position of a star to an observer on Earth varies periodically over the course of a year as the Earth's velocity changes as it revolves around the Sun, by a maximum angle of approximately 20 arcseconds in right ascension or declination. The term aberration has historically been used to refer to a number of related phenomena concerning the propagation of light in moving bodies. Aberration is distinct from parallax, which is a change in the apparent position of a relatively nearby object, as measured by a moving observer, relative to more distant objects that define a reference frame. The amount of parallax depends on the distance of the object from the observer, whereas aberration does not. Aberration is also related to light-time correction and relativistic beaming, although it is often considered separately from these effects. Aberration is historically significant because of its role in the development of the theories of light, electromagnetism and, ultimately, the theory of special relativity. It was first observed in the late 1600s by astronomers searching for stellar parallax in order to confirm the heliocentric model of the Solar System. However, it was not understood at the time to be a different phenomenon. In 1727, James Bradley provided a classical explanation for it in terms of the finite speed of light relative to the motion of the Earth in its orbit around the Sun, which he used to make one of the earliest measurements of the speed of light. However, Bradley's theory was incompatible with 19th century theories of light, and aberration became a major motivation for the aether drag theories of Augustin Fresnel (in 1818) and G. G. Stokes (in 1845), and for Hendrik Lorentz's aether theory of electromagnetism in 1892. The aberration of light, together with Lorentz's elaboration of Maxwell's electrodynamics, the moving magnet and conductor problem, the negative aether drift experiments, as well as the Fizeau experiment, led Albert Einstein to develop the theory of special relativity in 1905, which presents a general form of the equation for aberration in terms of such theory. Explanation Aberration may be explained as the difference in angle of a beam of light in different inertial frames of reference. A common analogy is to consider the apparent direction of falling rain. If rain is falling vertically in the frame of reference of a person standing still, then to a person moving forwards the rain will appear to arrive at an angle, requiring the moving observer to tilt their umbrella forwards. The faster the observer moves, the more tilt is needed. The net effect is that light rays striking the moving observer from the sides in a stationary frame will come angled from ahead in the moving observer's frame. This effect is sometimes called the "searchlight" or "headlight" effect. In the case of annual aberration of starlight, the direction of incoming starlight as seen in the Earth's moving frame is tilted relative to the angle observed in the Sun's frame. Since the direction of motion of the Earth changes during its orbit, the direction of this tilting changes during the course of the year, and causes the apparent position of the star to differ from its true position as measured in the inertial frame of the Sun. While classical reasoning gives intuition for aberration, it leads to a number of physical paradoxes observable even at the classical level (see history). The theory of special relativity is required to correctly account for aberration. The relativistic explanation is very similar to the classical one however, and in both theories aberration may be understood as a case of addition of velocities. Classical explanation In the Sun's frame, consider a beam of light with velocity equal to the speed of light c, with x and y velocity components and , and thus at an angle θ such that . If the Earth is moving at velocity in the x direction relative to the Sun, then by velocity addition the x component of the beam's velocity in the Earth's frame of reference is , and the y velocity is unchanged, . Thus the angle of the light in the Earth's frame in terms of the angle in the Sun's frame is In the case of , this result reduces to , which in the limit may be approximated by . Relativistic explanation The reasoning in the relativistic case is the same except that the relativistic velocity addition formulas must be used, which can be derived from Lorentz transformations between different frames of reference. These formulas are where , giving the components of the light beam in the Earth's frame in terms of the components in the Sun's frame. The angle of the beam in the Earth's frame is thus In the case of , this result reduces to , and in the limit this may be approximated by . This relativistic derivation keeps the speed of light constant in all frames of reference, unlike the classical derivation above. Relationship to light-time correction and relativistic beaming Aberration is related to two other phenomena, light-time correction, which is due to the motion of an observed object during the time taken by its light to reach an observer, and relativistic beaming, which is an angling of the light emitted by a moving light source. It can be considered equivalent to them but in a different inertial frame of reference. In aberration, the observer is considered to be moving relative to a (for the sake of simplicity) stationary light source, while in light-time correction and relativistic beaming the light source is considered to be moving relative to a stationary observer. Consider the case of an observer and a light source moving relative to each other at constant velocity, with a light beam moving from the source to the observer. At the moment of emission, the beam in the observer's rest frame is tilted compared to the one in the source's rest frame, as understood through relativistic beaming. During the time it takes the light beam to reach the observer the light source moves in the observer's frame, and the 'true position' of the light source is displaced relative to the apparent position the observer sees, as explained by light-time correction. Finally, the beam in the observer's frame at the moment of observation is tilted compared to the beam in source's frame, which can be understood as an aberrational effect. Thus, a person in the light source's frame would describe the apparent tilting of the beam in terms of aberration, while a person in the observer's frame would describe it as a light-time effect. The relationship between these phenomena is only valid if the observer and source's frames are inertial frames. In practice, because the Earth is not an inertial rest frame but experiences centripetal acceleration towards the Sun, many aberrational effects such as annual aberration on Earth cannot be considered light-time corrections. However, if the time between emission and detection of the light is short compared to the orbital period of the Earth, the Earth may be approximated as an inertial frame and aberrational effects are equivalent to light-time corrections. Types There are a number of types of aberration, caused by the differing components of the Earth's and observed object's motion: Annual aberration is due to the orbital revolution of the Earth around the Sun. Planetary aberration is the combination of aberration and light-time correction. Diurnal aberration is due to the rotation of the Earth about its own axis. Secular aberration is due to the motion of the Sun and Solar System relative to other stars in our Galaxy. Annual aberration Annual aberration is caused by the motion of an observer on Earth as the planet revolves around the Sun. Due to orbital eccentricity, the orbital velocity of Earth (in the Sun's rest frame) varies periodically during the year as the planet traverses its elliptic orbit and consequently the aberration also varies periodically, typically causing stars to appear to move in small ellipses. Approximating Earth's orbit as circular, the maximum displacement of a star due to annual aberration is known as the constant of aberration, conventionally represented by . It may be calculated using the relation substituting the Earth's average speed in the Sun's frame for and the speed of light . Its accepted value is 20.49552" or arcseconds or 0.000099365 rad or radian (at J2000). Assuming a circular orbit, annual aberration causes stars exactly on the ecliptic (the plane of Earth's orbit) to appear to move back and forth along a straight line, varying by on either side of their position in the Sun's frame. A star that is precisely at one of the ecliptic poles (at 90° from the ecliptic plane) will appear to move in a circle of radius about its true position, and stars at intermediate ecliptic latitudes will appear to move along a small ellipse. For illustration, consider a star at the northern ecliptic pole viewed by an observer at a point on the Arctic Circle. Such an observer will see the star transit at the zenith, once every day (strictly speaking sidereal day). At the time of the March equinox, Earth's orbit carries the observer in a southwards direction, and the star's apparent declination is therefore displaced to the south by an angle of . On the September equinox, the star's position is displaced to the north by an equal and opposite amount. On either solstice, the displacement in declination is 0. Conversely, the amount of displacement in right ascension is 0 on either equinox and at maximum on either solstice. In actuality, Earth's orbit is slightly elliptic rather than circular, and its speed varies somewhat over the course of its orbit, which means the description above is only approximate. Aberration is more accurately calculated using Earth's instantaneous velocity relative to the barycenter of the Solar System. Note that the displacement due to aberration is orthogonal to any displacement due to parallax. If parallax were detectable, the maximum displacement to the south would occur in December, and the maximum displacement to the north in June. It is this apparently anomalous motion that so mystified early astronomers. Solar annual aberration A special case of annual aberration is the nearly constant deflection of the Sun from its position in the Sun's rest frame by towards the west (as viewed from Earth), opposite to the apparent motion of the Sun along the ecliptic (which is from west to east, as seen from Earth). The deflection thus makes the Sun appear to be behind (or retarded) from its rest-frame position on the ecliptic by a position or angle . This deflection may equivalently be described as a light-time effect due to motion of the Earth during the 8.3 minutes that it takes light to travel from the Sun to Earth. The relation with κ is : [0.000099365 rad / 2 π rad] x [ 365.25 d x 24 h/d x 60 min/h] = 8.3167 min ≈ 8 min 19 s = 499 s. This is possible since the transit time of sunlight is short relative to the orbital period of the Earth, so the Earth's frame may be approximated as inertial. In the Earth's frame, the Sun moves, at a mean velocity v = 29.789 km/s, by a distance ≈ 14,864.7 km in the time it takes light to reach Earth, ≈ 499 s for the orbit of mean radius = 1 AU = 149,597,870.7 km. This gives an angular correction ≈ 0.000099364 rad = 20.49539", which can be solved to give ≈ 0.000099365 rad = 20.49559", very nearly the same as the aberrational correction (here κ is in radian and not in arcsecond). Planetary aberration Planetary aberration is the combination of the aberration of light (due to Earth's velocity) and light-time correction (due to the object's motion and distance), as calculated in the rest frame of the Solar System. Both are determined at the instant when the moving object's light reaches the moving observer on Earth. It is so called because it is usually applied to planets and other objects in the Solar System whose motion and distance are accurately known. Diurnal aberration Diurnal aberration is caused by the velocity of the observer on the surface of the rotating Earth. It is therefore dependent not only on the time of the observation, but also the latitude and longitude of the observer. Its effect is much smaller than that of annual aberration, and is only 0.32 arcseconds in the case of an observer at the Equator, where the rotational velocity is greatest. Secular aberration The Sun and Solar System are revolving around the center of the Galaxy. Aberration due to this motion is known as secular aberration and affects the apparent positions of distant stars and extragalactic objects. However, since the galactic year is about 230 million years, the aberration varies very slowly and this change is extremely difficult to observe. Therefore, secular aberration is usually ignored when considering the positions of stars. In other words, star maps show the observed apparent positions of the stars, not their calculated true positions after accounting for secular aberration. For stars significantly less than 230 million light years away, the Solar System may be approximated as an inertial frame and so the effect of secular aberration is equivalent to a light-time correction. This includes stars in the Milky Way, since the Milky Way is about 100,000 light years in diameter. For these stars the true position of the star is then easily computed from its proper motion and its distance. Secular aberration is typically a small number of arcminutes, for example the stationary star Groombridge 1830 is displaced by approximately 3 arcminutes, due to secular aberration. This is roughly 8 times the effect of annual aberration, as one would expect since the velocity of the Solar System relative to the center of the Galaxy is about 8 times the velocity of the Earth relative to the Sun. Discovery and first observations The discovery of the aberration of light was totally unexpected, and it was only by considerable perseverance and perspicacity that Bradley was able to explain it in 1727. It originated from attempts to discover whether stars possessed appreciable parallaxes. Search for stellar parallax The Copernican heliocentric theory of the Solar System had received confirmation by the observations of Galileo and Tycho Brahe and the mathematical investigations of Kepler and Newton. As early as 1573, Thomas Digges had suggested that parallactic shifting of the stars should occur according to the heliocentric model, and consequently if stellar parallax could be observed it would help confirm this theory. Many observers claimed to have determined such parallaxes, but Tycho Brahe and Giovanni Battista Riccioli concluded that they existed only in the minds of the observers, and were due to instrumental and personal errors. However, in 1680 Jean Picard, in his Voyage d’Uranibourg, stated, as a result of ten years' observations, that Polaris, the Pole Star, exhibited variations in its position amounting to 40″ annually. Some astronomers endeavoured to explain this by parallax, but these attempts failed because the motion differed from that which parallax would produce. John Flamsteed, from measurements made in 1689 and succeeding years with his mural quadrant, similarly concluded that the declination of Polaris was 40″ less in July than in September. Robert Hooke, in 1674, published his observations of γ Draconis, a star of magnitude 2m which passes practically overhead at the latitude of London (hence its observations are largely free from the complex corrections due to atmospheric refraction), and concluded that this star was 23″ more northerly in July than in October. James Bradley's observations Consequently, when Bradley and Samuel Molyneux entered this sphere of research in 1725, there was still considerable uncertainty as to whether stellar parallaxes had been observed or not, and it was with the intention of definitely answering this question that they erected a large telescope at Molyneux's house at Kew. They decided to reinvestigate the motion of γ Draconis with a telescope constructed by George Graham (1675–1751), a celebrated instrument-maker. This was fixed to a vertical chimney stack in such manner as to permit a small oscillation of the eyepiece, the amount of which (i.e. the deviation from the vertical) was regulated and measured by the introduction of a screw and a plumb line. The instrument was set up in November 1725, and observations on γ Draconis were made starting in December. The star was observed to move 40″ southwards between September and March, and then reversed its course from March to September. At the same time, 35 Camelopardalis, a star with a right ascension nearly exactly opposite to that of γ Draconis, was 19" more northerly at the beginning of March than in September. These results were completely unexpected and inexplicable by existing theories. Early hypotheses Bradley and Molyneux discussed several hypotheses in the hope of finding the solution. Since the apparent motion was evidently caused neither by parallax nor observational errors, Bradley first hypothesized that it could be due to oscillations in the orientation of the Earth's axis relative to the celestial sphere – a phenomenon known as nutation. 35 Camelopardalis was seen to possess an apparent motion which could be consistent with nutation, but since its declination varied only one half as much as that of γ Draconis, it was obvious that nutation did not supply the answer (however, Bradley later went on to discover that the Earth does indeed nutate). He also investigated the possibility that the motion was due to an irregular distribution of the Earth's atmosphere, thus involving abnormal variations in the refractive index, but again obtained negative results. On August 19, 1727, Bradley embarked upon a further series of observations using a telescope of his own erected at the Rectory, Wanstead. This instrument had the advantage of a larger field of view and he was able to obtain precise positions of a large number of stars over the course of about twenty years. During his first two years at Wanstead, he established the existence of the phenomenon of aberration beyond all doubt, and this also enabled him to formulate a set of rules that would allow the calculation of the effect on any given star at a specified date. Development of the theory of aberration Bradley eventually developed his explanation of aberration in about September 1728 and this theory was presented to the Royal Society in mid January the following year. One well-known story was that he saw the change of direction of a wind vane on a boat on the Thames, caused not by an alteration of the wind itself, but by a change of course of the boat relative to the wind direction. However, there is no record of this incident in Bradley's own account of the discovery, and it may therefore be apocryphal. The following table shows the magnitude of deviation from true declination for γ Draconis and the direction, on the planes of the solstitial colure and ecliptic prime meridian, of the tangent of the velocity of the Earth in its orbit for each of the four months where the extremes are found, as well as expected deviation from true ecliptic longitude if Bradley had measured its deviation from right ascension: Bradley proposed that the aberration of light not only affected declination, but right ascension as well, so that a star in the pole of the ecliptic would describe a little ellipse with a diameter of about 40", but for simplicity, he assumed it to be a circle. Since he only observed the deviation in declination, and not in right ascension, his calculations for the maximum deviation of a star in the pole of the ecliptic are for its declination only, which will coincide with the diameter of the little circle described by such star. For eight different stars, his calculations are as follows: Based on these calculations, Bradley was able to estimate the constant of aberration at 20.2", which is equal to 0.00009793 radians, and with this was able to estimate the speed of light at per second. By projecting the little circle for a star in the pole of the ecliptic, he could simplify the calculation of the relationship between the speed of light and the speed of the Earth's annual motion in its orbit as follows: Thus, the speed of light to the speed of the Earth's annual motion in its orbit is 10,210 to one, from whence it would follow, that light moves, or is propagated as far as from the Sun to the Earth in 8 minutes 12 seconds. The discovery and elucidation of aberration is now regarded as a classic case of the application of scientific method, in which observations are made to test a theory, but unexpected results are sometimes obtained that in turn lead to new discoveries. It is also worth noting that part of the original motivation of the search for stellar parallax was to test the Copernican theory that the Earth revolves around the Sun, but of course the existence of aberration also establishes the truth of that theory. Historical theories of aberration The phenomenon of aberration became a driving force for many physical theories during the 200 years between its observation and the conclusive explanation by Albert Einstein. The first classical explanation was provided in 1729, by James Bradley as described above, who attributed it to the finite speed of light and the motion of Earth in its orbit around the Sun. However, this explanation proved inaccurate once the wave nature of light was better understood, and correcting it became a major goal of the 19th century theories of luminiferous aether. Augustin-Jean Fresnel proposed a correction due to the motion of a medium (the aether) through which light propagated, known as "partial aether drag". He proposed that objects partially drag the aether along with them as they move, and this became the accepted explanation for aberration for some time. George Stokes proposed a similar theory, explaining that aberration occurs due to the flow of aether induced by the motion of the Earth. Accumulated evidence against these explanations, combined with new understanding of the electromagnetic nature of light, led Hendrik Lorentz to develop an electron theory which featured an immobile aether, and he explained that objects contract in length as they move through the aether. Motivated by these previous theories, Albert Einstein then developed the theory of special relativity in 1905, which provides the modern account of aberration. Bradley's classical explanation Bradley conceived of an explanation in terms of a corpuscular theory of light in which light is made of particles. His classical explanation appeals to the motion of the earth relative to a beam of light-particles moving at a finite velocity, and is developed in the Sun's frame of reference, unlike the classical derivation given above. Consider the case where a distant star is motionless relative to the Sun, and the star is extremely far away, so that parallax may be ignored. In the rest frame of the Sun, this means light from the star travels in parallel paths to the Earth observer, and arrives at the same angle regardless of where the Earth is in its orbit. Suppose the star is observed on Earth with a telescope, idealized as a narrow tube. The light enters the tube from the star at angle and travels at speed taking a time to reach the bottom of the tube, where it is detected. Suppose observations are made from Earth, which is moving with a speed . During the transit of the light, the tube moves a distance . Consequently, for the particles of light to reach the bottom of the tube, the tube must be inclined at an angle different from , resulting in an apparent position of the star at angle . As the Earth proceeds in its orbit it changes direction, so changes with the time of year the observation is made. The apparent angle and true angle are related using trigonometry as: . In the case of , this gives . While this is different from the more accurate relativistic result described above, in the limit of small angle and low velocity they are approximately the same, within the error of the measurements of Bradley's day. These results allowed Bradley to make one of the earliest measurements of the speed of light. Luminiferous aether In the early nineteenth century the wave theory of light was being rediscovered, and in 1804 Thomas Young adapted Bradley's explanation for corpuscular light to wavelike light traveling through a medium known as the luminiferous aether. His reasoning was the same as Bradley's, but it required that this medium be immobile in the Sun's reference frame and must pass through the earth unaffected, otherwise the medium (and therefore the light) would move along with the earth and no aberration would be observed. He wrote: However, it soon became clear Young's theory could not account for aberration when materials with a non-vacuum index of refraction were present. An important example is of a telescope filled with water. The velocity of the light in such a telescope will be slower than in vacuum, and is given by rather than where is the index of refraction of the water. Thus, by Bradley and Young's reasoning the aberration angle is given by . which predicts a medium-dependent angle of aberration. When refraction at the telescope's objective is taken into account this result deviates even more from the vacuum result. In 1810 François Arago performed a similar experiment and found that the aberration was unaffected by the medium in the telescope, providing solid evidence against Young's theory. This experiment was subsequently verified by many others in the following decades, most accurately by Airy in 1871, with the same result. Aether drag models Fresnel's aether drag In 1818, Augustin Fresnel developed a modified explanation to account for the water telescope and for other aberration phenomena. He explained that the aether is generally at rest in the Sun's frame of reference, but objects partially drag the aether along with them as they move. That is, the aether in an object of index of refraction moving at velocity is partially dragged with a velocity bringing the light along with it. This factor is known as "Fresnel's dragging coefficient". This dragging effect, along with refraction at the telescope's objective, compensates for the slower speed of light in the water telescope in Bradley's explanation. With this modification Fresnel obtained Bradley's vacuum result even for non-vacuum telescopes, and was also able to predict many other phenomena related to the propagation of light in moving bodies. Fresnel's dragging coefficient became the dominant explanation of aberration for the next decades. Stokes' aether drag However, the fact that light is polarized (discovered by Fresnel himself) led scientists such as Cauchy and Green to believe that the aether was a totally immobile elastic solid as opposed to Fresnel's fluid aether. There was thus renewed need for an explanation of aberration consistent both with Fresnel's predictions (and Arago's observations) as well as polarization. In 1845, Stokes proposed a 'putty-like' aether which acts as a liquid on large scales but as a solid on small scales, thus supporting both the transverse vibrations required for polarized light and the aether flow required to explain aberration. Making only the assumptions that the fluid is irrotational and that the boundary conditions of the flow are such that the aether has zero velocity far from the Earth, but moves at the Earth's velocity at its surface and within it, he was able to completely account for aberration. The velocity of the aether outside of the Earth would decrease as a function of distance from the Earth so light rays from stars would be progressively dragged as they approached the surface of the Earth. The Earth's motion would be unaffected by the aether due to D'Alembert's paradox. Both Fresnel and Stokes' theories were popular. However, the question of aberration was put aside during much of the second half of the 19th century as focus of inquiry turned to the electromagnetic properties of aether. Lorentz' length contraction In the 1880s once electromagnetism was better understood, interest turned again to the problem of aberration. By this time flaws were known to both Fresnel's and Stokes' theories. Fresnel's theory required that the relative velocity of aether and matter to be different for light of different colors, and it was shown that the boundary conditions Stokes had assumed in his theory were inconsistent with his assumption of irrotational flow. At the same time, the modern theories of electromagnetic aether could not account for aberration at all. Many scientists such as Maxwell, Heaviside and Hertz unsuccessfully attempted to solve these problems by incorporating either Fresnel or Stokes' theories into Maxwell's new electromagnetic laws. Hendrik Lorentz spent considerable effort along these lines. After working on this problem for a decade, the issues with Stokes' theory caused him to abandon it and to follow Fresnel's suggestion of a (mostly) stationary aether (1892, 1895). However, in Lorentz's model the aether was completely immobile, like the electromagnetic aethers of Cauchy, Green and Maxwell and unlike Fresnel's aether. He obtained Fresnel's dragging coefficient from modifications of Maxwell's electromagnetic theory, including a modification of the time coordinates in moving frames ("local time"). In order to explain the Michelson–Morley experiment (1887), which apparently contradicted both Fresnel's and Lorentz's immobile aether theories, and apparently confirmed Stokes' complete aether drag, Lorentz theorized (1892) that objects undergo "length contraction" by a factor of in the direction of their motion through the aether. In this way, aberration (and all related optical phenomena) can be accounted for in the context of an immobile aether. Lorentz' theory became the basis for much research in the next decade, and beyond. Its predictions for aberration are identical to those of the relativistic theory. Special relativity Lorentz' theory matched experiment well, but it was complicated and made many unsubstantiated physical assumptions about the microscopic nature of electromagnetic media. In his 1905 theory of special relativity, Albert Einstein reinterpreted the results of Lorentz' theory in a much simpler and more natural conceptual framework which disposed of the idea of an aether. His derivation is given above, and is now the accepted explanation. Robert S. Shankland reported some conversations with Einstein, in which Einstein emphasized the importance of aberration: Other important motivations for Einstein's development of relativity were the moving magnet and conductor problem and (indirectly) the negative aether drift experiments, already mentioned by him in the introduction of his first relativity paper. Einstein wrote in a note in 1952: While Einstein's result is the same as Bradley's original equation except for an extra factor of , Bradley's result does not merely give the classical limit of the relativistic case, in the sense that it gives incorrect predictions even at low relative velocities. Bradley's explanation cannot account for situations such as the water telescope, nor for many other optical effects (such as interference) that might occur within the telescope. This is because in the Earth's frame it predicts that the direction of propagation of the light beam in the telescope is not normal to the wavefronts of the beam, in contradiction with Maxwell's theory of electromagnetism. It also does not preserve the speed of light c between frames. However, Bradley did correctly infer that the effect was due to relative velocities. See also Apparent place Stellar parallax Astronomical nutation Proper motion Timeline of electromagnetism and classical optics Stellar aberration (derivation from Lorentz transformation) Relativistic aberration Notes References Further reading P. Kenneth Seidelmann (Ed.), Explanatory Supplement to the Astronomical Almanac (University Science Books, 1992), 127–135, 700. Stephen Peter Rigaud, Miscellaneous Works and Correspondence of the Rev. James Bradley, D.D. F.R.S. (1832). Charles Hutton, Mathematical and Philosophical Dictionary (1795). H. H. Turner, Astronomical Discovery (1904). Thomas Simpson, Essays on Several Curious and Useful Subjects in Speculative and Mix'd Mathematicks (1740). :de:August Ludwig Busch, Reduction of the Observations Made by Bradley at Kew and Wansted to Determine the Quantities of Aberration and Nutation (1838). External links Courtney Seligman on Bradley's observations Electromagnetic radiation Astrometry Radiation

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https://en.wikipedia.org/wiki/Optical%20aberration

Optical aberration

In optics, aberration is a property of optical systems, such as lenses, that causes light to be spread out over some region of space rather than focused to a point. Aberrations cause the image formed by a lens to be blurred or distorted, with the nature of the distortion depending on the type of aberration. Aberration can be defined as a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements. An image-forming optical system with aberration will produce an image which is not sharp. Makers of optical instruments need to correct optical systems to compensate for aberration. Aberration can be analyzed with the techniques of geometrical optics. The articles on reflection, refraction and caustics discuss the general features of reflected and refracted rays. Overview With an ideal lens, light from any given point on an object would pass through the lens and come together at a single point in the image plane (or, more generally, the image surface). Real lenses do not focus light exactly to a single point, however, even when they are perfectly made. These deviations from the idealized lens performance are called aberrations of the lens. Aberrations fall into two classes: monochromatic and chromatic. Monochromatic aberrations are caused by the geometry of the lens or mirror and occur both when light is reflected and when it is refracted. They appear even when using monochromatic light, hence the name. Chromatic aberrations are caused by dispersion, the variation of a lens's refractive index with wavelength. Because of dispersion, different wavelengths of light come to focus at different points. Chromatic aberration does not appear when monochromatic light is used. Monochromatic aberrations The most common monochromatic aberrations are: Defocus Spherical aberration Coma Astigmatism Field curvature Image distortion Although defocus is technically the lowest-order of the optical aberrations, it is usually not considered as a lens aberration, since it can be corrected by moving the lens (or the image plane) to bring the image plane to the optical focus of the lens. In addition to these aberrations, piston and tilt are effects which shift the position of the focal point. Piston and tilt are not true optical aberrations, since when an otherwise perfect wavefront is altered by piston and tilt, it will still form a perfect, aberration-free image, only shifted to a different position. Chromatic aberrations Chromatic aberration occurs when different wavelengths are not focussed to the same point. Types of chromatic aberration are: Axial (or "longitudinal") chromatic aberration Lateral (or "transverse") chromatic aberration Theory of monochromatic aberration In a perfect optical system in the classical theory of optics, rays of light proceeding from any object point unite in an image point; and therefore the object space is reproduced in an image space. The introduction of simple auxiliary terms, due to Gauss, named the focal lengths and focal planes, permits the determination of the image of any object for any system. The Gaussian theory, however, is only true so long as the angles made by all rays with the optical axis (the symmetrical axis of the system) are infinitely small, i.e. with infinitesimal objects, images and lenses; in practice these conditions may not be realized, and the images projected by uncorrected systems are, in general, ill-defined and often blurred if the aperture or field of view exceeds certain limits. The investigations of James Clerk Maxwell and Ernst Abbe showed that the properties of these reproductions, i.e. the relative position and magnitude of the images, are not special properties of optical systems, but necessary consequences of the supposition (per Abbe) of the reproduction of all points of a space in image points, and are independent of the manner in which the reproduction is effected. These authors showed, however, that no optical system can justify these suppositions, since they are contradictory to the fundamental laws of reflection and refraction. Consequently, the Gaussian theory only supplies a convenient method of approximating reality; realistic optical systems fall short of this unattainable ideal. Currently, all that can be accomplished is the projection of a single plane onto another plane; but even in this, aberrations always occurs and it may be unlikely that these will ever be entirely corrected. Aberration of axial points (spherical aberration in the restricted sense) Let S (fig. 1) be any optical system, rays proceeding from an axis point O under an angle u1 will unite in the axis point O'1; and those under an angle u2 in the axis point O'2. If there is refraction at a collective spherical surface, or through a thin positive lens, O'2 will lie in front of O'1 so long as the angle u2 is greater than u1 (under correction); and conversely with a dispersive surface or lenses (over correction). The caustic, in the first case, resembles the sign > (greater than); in the second < (less than). If the angle u1 is very small, O'1 is the Gaussian image; and O'1 O'2 is termed the longitudinal aberration, and O'1R the lateral aberration of the pencils with aperture u2. If the pencil with the angle u2 is that of the maximum aberration of all the pencils transmitted, then in a plane perpendicular to the axis at O'1 there is a circular disk of confusion of radius O'1R, and in a parallel plane at O'2 another one of radius O'2R2; between these two is situated the disk of least confusion. The largest opening of the pencils, which take part in the reproduction of O, i.e. the angle u, is generally determined by the margin of one of the lenses or by a hole in a thin plate placed between, before, or behind the lenses of the system. This hole is termed the stop or diaphragm; Abbe used the term aperture stop for both the hole and the limiting margin of the lens. The component S1 of the system, situated between the aperture stop and the object O, projects an image of the diaphragm, termed by Abbe the entrance pupil; the exit pupil is the image formed by the component S2, which is placed behind the aperture stop. All rays which issue from O and pass through the aperture stop also pass through the entrance and exit pupils, since these are images of the aperture stop. Since the maximum aperture of the pencils issuing from O is the angle u subtended by the entrance pupil at this point, the magnitude of the aberration will be determined by the position and diameter of the entrance pupil. If the system be entirely behind the aperture stop, then this is itself the entrance pupil (front stop); if entirely in front, it is the exit pupil (back stop). If the object point be infinitely distant, all rays received by the first member of the system are parallel, and their intersections, after traversing the system, vary according to their perpendicular height of incidence, i.e. their distance from the axis. This distance replaces the angle u in the preceding considerations; and the aperture, i.e. the radius of the entrance pupil, is its maximum value. Aberration of elements, i.e. smallest objects at right angles to the axis If rays issuing from O (fig. 1) are concurrent, it does not follow that points in a portion of a plane perpendicular at O to the axis will be also concurrent, even if the part of the plane be very small. As the diameter of the lens increases (i.e., with increasing aperture), the neighboring point N will be reproduced, but attended by aberrations comparable in magnitude to ON. These aberrations are avoided if, according to Abbe, the sine condition, sin u'1/sin u1=sin u'2/sin u2, holds for all rays reproducing the point O. If the object point O is infinitely distant, u1 and u2 are to be replaced by h1 and h2, the perpendicular heights of incidence; the sine condition then becomes sin u'1/h1=sin u'2/h2. A system fulfilling this condition and free from spherical aberration is called aplanatic (Greek a-, privative, plann, a wandering). This word was first used by Robert Blair to characterize a superior achromatism, and, subsequently, by many writers to denote freedom from spherical aberration as well. Since the aberration increases with the distance of the ray from the center of the lens, the aberration increases as the lens diameter increases (or, correspondingly, with the diameter of the aperture), and hence can be minimized by reducing the aperture, at the cost of also reducing the amount of light reaching the image plane. Aberration of lateral object points (points beyond the axis) with narrow pencils — astigmatism A point O (fig. 2) at a finite distance from the axis (or with an infinitely distant object, a point which subtends a finite angle at the system) is, in general, even then not sharply reproduced if the pencil of rays issuing from it and traversing the system is made infinitely narrow by reducing the aperture stop; such a pencil consists of the rays which can pass from the object point through the now infinitely small entrance pupil. It is seen (ignoring exceptional cases) that the pencil does not meet the refracting or reflecting surface at right angles; therefore it is astigmatic (Gr. a-, privative, stigmia, a point). Naming the central ray passing through the entrance pupil the axis of the pencil or principal ray, it can be said: the rays of the pencil intersect, not in one point, but in two focal lines, which can be assumed to be at right angles to the principal ray; of these, one lies in the plane containing the principal ray and the axis of the system, i.e. in the first principal section or meridional section, and the other at right angles to it, i.e. in the second principal section or sagittal section. We receive, therefore, in no single intercepting plane behind the system, as, for example, a focusing screen, an image of the object point; on the other hand, in each of two planes lines O' and O" are separately formed (in neighboring planes ellipses are formed), and in a plane between O' and O" a circle of least confusion. The interval O'O", termed the astigmatic difference, increases, in general, with the angle W made by the principal ray OP with the axis of the system, i.e. with the field of view. Two astigmatic image surfaces correspond to one object plane; and these are in contact at the axis point; on the one lie the focal lines of the first kind, on the other those of the second. Systems in which the two astigmatic surfaces coincide are termed anastigmatic or stigmatic. Sir Isaac Newton was probably the discoverer of astigmation; the position of the astigmatic image lines was determined by Thomas Young; and the theory was developed by Allvar Gullstrand. A bibliography by P. Culmann is given in Moritz von Rohr's Die Bilderzeugung in optischen Instrumenten. Aberration of lateral object points with broad pencils — coma By opening the stop wider, similar deviations arise for lateral points as have been already discussed for axial points; but in this case they are much more complicated. The course of the rays in the meridional section is no longer symmetrical to the principal ray of the pencil; and on an intercepting plane there appears, instead of a luminous point, a patch of light, not symmetrical about a point, and often exhibiting a resemblance to a comet having its tail directed towards or away from the axis. From this appearance it takes its name. The unsymmetrical form of the meridional pencil—formerly the only one considered—is coma in the narrower sense only; other errors of coma have been treated by Arthur König and Moritz von Rohr, and later by Allvar Gullstrand. Curvature of the field of the image If the above errors be eliminated, the two astigmatic surfaces united, and a sharp image obtained with a wide aperture—there remains the necessity to correct the curvature of the image surface, especially when the image is to be received upon a plane surface, e.g. in photography. In most cases the surface is concave towards the system. Distortion of the image Even if the image is sharp, it may be distorted compared to ideal pinhole projection. In pinhole projection, the magnification of an object is inversely proportional to its distance to the camera along the optical axis so that a camera pointing directly at a flat surface reproduces that flat surface. Distortion can be thought of as stretching the image non-uniformly, or, equivalently, as a variation in magnification across the field. While "distortion" can include arbitrary deformation of an image, the most pronounced modes of distortion produced by conventional imaging optics is "barrel distortion", in which the center of the image is magnified more than the perimeter (figure 3a). The reverse, in which the perimeter is magnified more than the center, is known as "pincushion distortion" (figure 3b). This effect is called lens distortion or image distortion, and there are algorithms to correct it. Systems free of distortion are called orthoscopic (orthos, right, skopein to look) or rectilinear (straight lines). This aberration is quite distinct from that of the sharpness of reproduction; in unsharp, reproduction, the question of distortion arises if only parts of the object can be recognized in the figure. If, in an unsharp image, a patch of light corresponds to an object point, the center of gravity of the patch may be regarded as the image point, this being the point where the plane receiving the image, e.g., a focusing screen, intersects the ray passing through the middle of the stop. This assumption is justified if a poor image on the focusing screen remains stationary when the aperture is diminished; in practice, this generally occurs. This ray, named by Abbe a principal ray (not to be confused with the principal rays of the Gaussian theory), passes through the center of the entrance pupil before the first refraction, and the center of the exit pupil after the last refraction. From this it follows that correctness of drawing depends solely upon the principal rays; and is independent of the sharpness or curvature of the image field. Referring to fig. 4, we have O'Q'/OQ = a' tan w'/a tan w = 1/N, where N is the scale or magnification of the image. For N to be constant for all values of w, a' tan w'/a tan w must also be constant. If the ratio a'/a be sufficiently constant, as is often the case, the above relation reduces to the condition of Airy, i.e. tan w'/ tan w= a constant. This simple relation (see Camb. Phil. Trans., 1830, 3, p. 1) is fulfilled in all systems which are symmetrical with respect to their diaphragm (briefly named symmetrical or holosymmetrical objectives), or which consist of two like, but different-sized, components, placed from the diaphragm in the ratio of their size, and presenting the same curvature to it (hemisymmetrical objectives); in these systems tan w' / tan w = 1. The constancy of a'/a necessary for this relation to hold was pointed out by R. H. Bow (Brit. Journ. Photog., 1861), and Thomas Sutton (Photographic Notes, 1862); it has been treated by O. Lummer and by M. von Rohr (Zeit. f. Instrumentenk., 1897, 17, and 1898, 18, p. 4). It requires the middle of the aperture stop to be reproduced in the centers of the entrance and exit pupils without spherical aberration. M. von Rohr showed that for systems fulfilling neither the Airy nor the Bow-Sutton condition, the ratio a' cos w'/a tan w will be constant for one distance of the object. This combined condition is exactly fulfilled by holosymmetrical objectives reproducing with the scale 1, and by hemisymmetrical, if the scale of reproduction be equal to the ratio of the sizes of the two components. Zernike model of aberrations Circular wavefront profiles associated with aberrations may be mathematically modeled using Zernike polynomials. Developed by Frits Zernike in the 1930s, Zernike's polynomials are orthogonal over a circle of unit radius. A complex, aberrated wavefront profile may be curve-fitted with Zernike polynomials to yield a set of fitting coefficients that individually represent different types of aberrations. These Zernike coefficients are linearly independent, thus individual aberration contributions to an overall wavefront may be isolated and quantified separately. There are even and odd Zernike polynomials. The even Zernike polynomials are defined as and the odd Zernike polynomials as where m and n are nonnegative integers with , Φ is the azimuthal angle in radians, and ρ is the normalized radial distance. The radial polynomials have no azimuthal dependence, and are defined as and if is odd. The first few Zernike polynomials, multiplied by their respective fitting coefficients, are: where is the normalized pupil radius with , is the azimuthal angle around the pupil with , and the fitting coefficients are the wavefront errors in wavelengths. As in Fourier synthesis using sines and cosines, a wavefront may be perfectly represented by a sufficiently large number of higher-order Zernike polynomials. However, wavefronts with very steep gradients or very high spatial frequency structure, such as produced by propagation through atmospheric turbulence or aerodynamic flowfields, are not well modeled by Zernike polynomials, which tend to low-pass filter fine spatial definition in the wavefront. In this case, other fitting methods such as fractals or singular value decomposition may yield improved fitting results. The circle polynomials were introduced by Frits Zernike to evaluate the point image of an aberrated optical system taking into account the effects of diffraction. The perfect point image in the presence of diffraction had already been described by Airy, as early as 1835. It took almost hundred years to arrive at a comprehensive theory and modeling of the point image of aberrated systems (Zernike and Nijboer). The analysis by Nijboer and Zernike describes the intensity distribution close to the optimum focal plane. An extended theory that allows the calculation of the point image amplitude and intensity over a much larger volume in the focal region was recently developed (Extended Nijboer-Zernike theory). This Extended Nijboer-Zernike theory of point image or ‘point-spread function’ formation has found applications in general research on image formation, especially for systems with a high numerical aperture, and in characterizing optical systems with respect to their aberrations. Analytic treatment of aberrations The preceding review of the several errors of reproduction belongs to the Abbe theory of aberrations, in which definite aberrations are discussed separately; it is well suited to practical needs, for in the construction of an optical instrument certain errors are sought to be eliminated, the selection of which is justified by experience. In the mathematical sense, however, this selection is arbitrary; the reproduction of a finite object with a finite aperture entails, in all probability, an infinite number of aberrations. This number is only finite if the object and aperture are assumed to be infinitely small of a certain order; and with each order of infinite smallness, i.e. with each degree of approximation to reality (to finite objects and apertures), a certain number of aberrations is associated. This connection is only supplied by theories which treat aberrations generally and analytically by means of indefinite series. A ray proceeding from an object point O (fig. 5) can be defined by the coordinates (ξ, η). Of this point O in an object plane I, at right angles to the axis, and two other coordinates (x, y), the point in which the ray intersects the entrance pupil, i.e. the plane II. Similarly the corresponding image ray may be defined by the points (ξ', η'), and (x', y'), in the planes I' and II'. The origins of these four plane coordinate systems may be collinear with the axis of the optical system; and the corresponding axes may be parallel. Each of the four coordinates ξ', η', x', y' are functions of ξ, η, x, y; and if it be assumed that the field of view and the aperture be infinitely small, then ξ, η, x, y are of the same order of infinitesimals; consequently by expanding ξ', η', x', y' in ascending powers of ξ, η, x, y, series are obtained in which it is only necessary to consider the lowest powers. It is readily seen that if the optical system be symmetrical, the origins of the coordinate systems collinear with the optical axis and the corresponding axes parallel, then by changing the signs of ξ, η, x, y, the values ξ', η', x', y' must likewise change their sign, but retain their arithmetical values; this means that the series are restricted to odd powers of the unmarked variables. The nature of the reproduction consists in the rays proceeding from a point O being united in another point O'; in general, this will not be the case, for ξ', η' vary if ξ, η be constant, but x, y variable. It may be assumed that the planes I' and II' are drawn where the images of the planes I and II are formed by rays near the axis by the ordinary Gaussian rules; and by an extension of these rules, not, however, corresponding to reality, the Gauss image point O'0, with coordinates ξ'0, η'0, of the point O at some distance from the axis could be constructed. Writing Dξ'=ξ'-ξ'0 and Dη'=η'-η'0, then Dξ' and Dη' are the aberrations belonging to ξ, η and x, y, and are functions of these magnitudes which, when expanded in series, contain only odd powers, for the same reasons as given above. On account of the aberrations of all rays which pass through O, a patch of light, depending in size on the lowest powers of ξ, η, x, y which the aberrations contain, will be formed in the plane I'. These degrees, named by J. Petzval (Bericht uber die Ergebnisse einiger dioptrischer Untersuchungen, Buda Pesth, 1843; Akad. Sitzber., Wien, 1857, vols. xxiv. xxvi.) the numerical orders of the image, are consequently only odd powers; the condition for the formation of an image of the mth order is that in the series for Dξ' and Dη' the coefficients of the powers of the 3rd, 5th...(m-2)th degrees must vanish. The images of the Gauss theory being of the third order, the next problem is to obtain an image of 5th order, or to make the coefficients of the powers of 3rd degree zero. This necessitates the satisfying of five equations; in other words, there are five alterations of the 3rd order, the vanishing of which produces an image of the 5th order. The expression for these coefficients in terms of the constants of the optical system, i.e. the radii, thicknesses, refractive indices and distances between the lenses, was solved by L. Seidel (Astr. Nach., 1856, p. 289); in 1840, J. Petzval constructed his portrait objective, from similar calculations which have never been published (see M. von Rohr, Theorie und Geschichte des photographischen Objectivs, Berlin, 1899, p. 248). The theory was elaborated by S. Finterswalder (Munchen. Acad. Abhandl., 1891, 17, p. 519), who also published a posthumous paper of Seidel containing a short view of his work (München. Akad. Sitzber., 1898, 28, p. 395); a simpler form was given by A. Kerber (Beiträge zur Dioptrik, Leipzig, 1895-6-7-8-9). A. Konig and M. von Rohr (see M. von Rohr, Die Bilderzeugung in optischen Instrumenten, pp. 317–323) have represented Kerber's method, and have deduced the Seidel formulae from geometrical considerations based on the Abbe method, and have interpreted the analytical results geometrically (pp. 212–316). The aberrations can also be expressed by means of the characteristic function of the system and its differential coefficients, instead of by the radii, &c., of the lenses; these formulae are not immediately applicable, but give, however, the relation between the number of aberrations and the order. Sir William Rowan Hamilton (British Assoc. Report, 1833, p. 360) thus derived the aberrations of the third order; and in later times the method was pursued by Clerk Maxwell (Proc. London Math. Soc., 1874–1875; (see also the treatises of R. S. Heath and L. A. Herman), M. Thiesen (Berlin. Akad. Sitzber., 1890, 35, p. 804), H. Bruns (Leipzig. Math. Phys. Ber., 1895, 21, p. 410), and particularly successfully by K. Schwarzschild (Göttingen. Akad. Abhandl., 1905, 4, No. 1), who thus discovered the aberrations of the 5th order (of which there are nine), and possibly the shortest proof of the practical (Seidel) formulae. A. Gullstrand (vide supra, and Ann. d. Phys., 1905, 18, p. 941) founded his theory of aberrations on the differential geometry of surfaces. The aberrations of the third order are: (1) aberration of the axis point; (2) aberration of points whose distance from the axis is very small, less than of the third order — the deviation from the sine condition and coma here fall together in one class; (3) astigmatism; (4) curvature of the field; (5) distortion. (1) Aberration of the third order of axis points is dealt with in all text-books on optics. It is very important in telescope design. In telescopes aperture is usually taken as the linear diameter of the objective. It is not the same as microscope aperture which is based on the entrance pupil or field of view as seen from the object and is expressed as an angular measurement. Higher order aberrations in telescope design can be mostly neglected. For microscopes it cannot be neglected. For a single lens of very small thickness and given power, the aberration depends upon the ratio of the radii r:r', and is a minimum (but never zero) for a certain value of this ratio; it varies inversely with the refractive index (the power of the lens remaining constant). The total aberration of two or more very thin lenses in contact, being the sum of the individual aberrations, can be zero. This is also possible if the lenses have the same algebraic sign. Of thin positive lenses with n=1.5, four are necessary to correct spherical aberration of the third order. These systems, however, are not of great practical importance. In most cases, two thin lenses are combined, one of which has just so strong a positive aberration (under-correction, vide supra) as the other a negative; the first must be a positive lens and the second a negative lens; the powers, however: may differ, so that the desired effect of the lens is maintained. It is generally an advantage to secure a great refractive effect by several weaker than by one high-power lens. By one, and likewise by several, and even by an infinite number of thin lenses in contact, no more than two axis points can be reproduced without aberration of the third order. Freedom from aberration for two axis points, one of which is infinitely distant, is known as Herschel's condition. All these rules are valid, inasmuch as the thicknesses and distances of the lenses are not to be taken into account. (2) The condition for freedom from coma in the third order is also of importance for telescope objectives; it is known as Fraunhofer's condition. (4) After eliminating the aberration On the axis, coma and astigmatism, the relation for the flatness of the field in the third order is expressed by the Petzval equation, S1/r(n'-n) = 0, where r is the radius of a refracting surface, n and n' the refractive indices of the neighboring media, and S the sign of summation for all refracting surfaces. Practical elimination of aberrations The classical imaging problem is to reproduce perfectly a finite plane (the object) onto another plane (the image) through a finite aperture. It is impossible to do so perfectly for more than one such pair of planes (this was proven with increasing generality by Maxwell in 1858, by Bruns in 1895, and by Carathéodory in 1926, see summary in Walther, A., J. Opt. Soc. Am. A 6, 415–422 (1989)). For a single pair of planes (e.g. for a single focus setting of an objective), however, the problem can in principle be solved perfectly. Examples of such a theoretically perfect system include the Luneburg lens and the Maxwell fish-eye. Practical methods solve this problem with an accuracy which mostly suffices for the special purpose of each species of instrument. The problem of finding a system which reproduces a given object upon a given plane with given magnification (insofar as aberrations must be taken into account) could be dealt with by means of the approximation theory; in most cases, however, the analytical difficulties were too great for older calculation methods but may be ameliorated by application of modern computer systems. Solutions, however, have been obtained in special cases (see A. Konig in M. von Rohr's Die Bilderzeugung, p. 373; K. Schwarzschild, Göttingen. Akad. Abhandl., 1905, 4, Nos. 2 and 3). At the present time constructors almost always employ the inverse method: they compose a system from certain, often quite personal experiences, and test, by the trigonometrical calculation of the paths of several rays, whether the system gives the desired reproduction (examples are given in A. Gleichen, Lehrbuch der geometrischen Optik, Leipzig and Berlin, 1902). The radii, thicknesses and distances are continually altered until the errors of the image become sufficiently small. By this method only certain errors of reproduction are investigated, especially individual members, or all, of those named above. The analytical approximation theory is often employed provisionally, since its accuracy does not generally suffice. In order to render spherical aberration and the deviation from the sine condition small throughout the whole aperture, there is given to a ray with a finite angle of aperture u* (width infinitely distant objects: with a finite height of incidence h*) the same distance of intersection, and the same sine ratio as to one neighboring the axis (u* or h* may not be much smaller than the largest aperture U or H to be used in the system). The rays with an angle of aperture smaller than u* would not have the same distance of intersection and the same sine ratio; these deviations are called zones, and the constructor endeavors to reduce these to a minimum. The same holds for the errors depending upon the angle of the field of view, w: astigmatism, curvature of field and distortion are eliminated for a definite value, w*, zones of astigmatism, curvature of field and distortion, attend smaller values of w. The practical optician names such systems: corrected for the angle of aperture u* (the height of incidence h*) or the angle of field of view w*. Spherical aberration and changes of the sine ratios are often represented graphically as functions of the aperture, in the same way as the deviations of two astigmatic image surfaces of the image plane of the axis point are represented as functions of the angles of the field of view. The final form of a practical system consequently rests on compromise; enlargement of the aperture results in a diminution of the available field of view, and vice versa. But the larger aperture will give the larger resolution. The following may be regarded as typical: (1) Largest aperture; necessary corrections are — for the axis point, and sine condition; errors of the field of view are almost disregarded; example — high-power microscope objectives. (2) Wide angle lens; necessary corrections are — for astigmatism, curvature of field and distortion; errors of the aperture only slightly regarded; examples — photographic widest angle objectives and oculars. Between these extreme examples stands the normal lens: this is corrected more with regard to aperture; objectives for groups more with regard to the field of view. (3) Long focus lenses have small fields of view and aberrations on axis are very important. Therefore zones will be kept as small as possible and design should emphasize simplicity. Because of this these lenses are the best for analytical computation. Chromatic or color aberration In optical systems composed of lenses, the position, magnitude and errors of the image depend upon the refractive indices of the glass employed (see Lens (optics) and Monochromatic aberration, above). Since the index of refraction varies with the color or wavelength of the light (see dispersion), it follows that a system of lenses (uncorrected) projects images of different colors in somewhat different places and sizes and with different aberrations; i.e. there are chromatic differences of the distances of intersection, of magnifications, and of monochromatic aberrations. If mixed light be employed (e.g. white light) all these images are formed and they cause a confusion, named chromatic aberration; for instance, instead of a white margin on a dark background, there is perceived a colored margin, or narrow spectrum. The absence of this error is termed achromatism, and an optical system so corrected is termed achromatic. A system is said to be chromatically under-corrected when it shows the same kind of chromatic error as a thin positive lens, otherwise it is said to be overcorrected. If, in the first place, monochromatic aberrations be neglected — in other words, the Gaussian theory be accepted — then every reproduction is determined by the positions of the focal planes, and the magnitude of the focal lengths, or if the focal lengths, as ordinarily happens, be equal, by three constants of reproduction. These constants are determined by the data of the system (radii, thicknesses, distances, indices, etc., of the lenses); therefore their dependence on the refractive index, and consequently on the color, are calculable. The refractive indices for different wavelengths must be known for each kind of glass made use of. In this manner the conditions are maintained that any one constant of reproduction is equal for two different colors, i.e. this constant is achromatized. For example, it is possible, with one thick lens in air, to achromatize the position of a focal plane of the magnitude of the focal length. If all three constants of reproduction be achromatized, then the Gaussian image for all distances of objects is the same for the two colors, and the system is said to be in stable achromatism. In practice it is more advantageous (after Abbe) to determine the chromatic aberration (for instance, that of the distance of intersection) for a fixed position of the object, and express it by a sum in which each component conlins the amount due to each refracting surface. In a plane containing the image point of one color, another colour produces a disk of confusion; this is similar to the confusion caused by two zones in spherical aberration. For infinitely distant objects the radius Of the chromatic disk of confusion is proportional to the linear aperture, and independent of the focal length (vide supra, Monochromatic Aberration of the Axis Point); and since this disk becomes the less harmful with an increasing image of a given object, or with increasing focal length, it follows that the deterioration of the image is proportional to the ratio of the aperture to the focal length, i.e. the relative aperture. (This explains the gigantic focal lengths in vogue before the discovery of achromatism.) Examples: (a) In a very thin lens, in air, only one constant of reproduction is to be observed, since the focal length and the distance of the focal point are equal. If the refractive index for one color be , and for another , and the powers, or reciprocals of the focal lengths, be and , then (1) ; is called the dispersion, and the dispersive power of the glass. (b) Two thin lenses in contact: let and be the powers corresponding to the lenses of refractive indices and and radii , , and , respectively; let denote the total power, and , , the changes of , , and with the color. Then the following relations hold: (2) ; and (3) . For achromatism , hence, from (3), (4) , or . Therefore and must have different algebraic signs, or the system must be composed of a collective and a dispersive lens. Consequently the powers of the two must be different (in order that be not zero (equation 2)), and the dispersive powers must also be different (according to 4). Newton failed to perceive the existence of media of different dispersive powers required by achromatism; consequently he constructed large reflectors instead of refractors. James Gregory and Leonhard Euler arrived at the correct view from a false conception of the achromatism of the eye; this was determined by Chester More Hall in 1728, Klingenstierna in 1754 and by Dollond in 1757, who constructed the celebrated achromatic telescopes. (See telescope.) Glass with weaker dispersive power (greater ) is named crown glass; that with greater dispersive power, flint glass. For the construction of an achromatic collective lens ( positive) it follows, by means of equation (4), that a collective lens I. of crown glass and a dispersive lens II. of flint glass must be chosen; the latter, although the weaker, corrects the other chromatically by its greater dispersive power. For an achromatic dispersive lens the converse must be adopted. This is, at the present day, the ordinary type, e.g., of telescope objective; the values of the four radii must satisfy the equations (2) and (4). Two other conditions may also be postulated: one is always the elimination of the aberration on the axis; the second either the Herschel or Fraunhofer Condition, the latter being the best vide supra, Monochromatic Aberration). In practice, however, it is often more useful to avoid the second condition by making the lenses have contact, i.e. equal radii. According to P. Rudolph (Eder's Jahrb. f. Photog., 1891, 5, p. 225; 1893, 7, p. 221), cemented objectives of thin lenses permit the elimination of spherical aberration on the axis, if, as above, the collective lens has a smaller refractive index; on the other hand, they permit the elimination of astigmatism and curvature of the field, if the collective lens has a greater refractive index (this follows from the Petzval equation; see L. Seidel, Astr. Nachr., 1856, p. 289). Should the cemented system be positive, then the more powerful lens must be positive; and, according to (4), to the greater power belongs the weaker dispersive power (greater ), that is to say, crown glass; consequently the crown glass must have the greater refractive index for astigmatic and plane images. In all earlier kinds of glass, however, the dispersive power increased with the refractive index; that is, decreased as increased; but some of the Jena glasses by E. Abbe and O. Schott were crown glasses of high refractive index, and achromatic systems from such crown glasses, with flint glasses of lower refractive index, are called the new achromats, and were employed by P. Rudolph in the first anastigmats (photographic objectives). Instead of making vanish, a certain value can be assigned to it which will produce, by the addition of the two lenses, any desired chromatic deviation, e.g. sufficient to eliminate one present in other parts of the system. If the lenses I. and II. be cemented and have the same refractive index for one color, then its effect for that one color is that of a lens of one piece; by such decomposition of a lens it can be made chromatic or achromatic at will, without altering its spherical effect. If its chromatic effect () be greater than that of the same lens, this being made of the more dispersive of the two glasses employed, it is termed hyper-chromatic. For two thin lenses separated by a distance the condition for achromatism is ; if (e.g. if the lenses be made of the same glass), this reduces to , known as the condition for oculars. If a constant of reproduction, for instance the focal length, be made equal for two colors, then it is not the same for other colors, if two different glasses are employed. For example, the condition for achromatism (4) for two thin lenses in contact is fulfilled in only one part of the spectrum, since varies within the spectrum. This fact was first ascertained by J. Fraunhofer, who defined the colors by means of the dark lines in the solar spectrum; and showed that the ratio of the dispersion of two glasses varied about 20% from the red to the violet (the variation for glass and water is about 50%). If, therefore, for two colors, a and b, , then for a third color, c, the focal length is different; that is, if c lies between a and b, then , and vice versa; these algebraic results follow from the fact that towards the red the dispersion of the positive crown glass preponderates, towards the violet that of the negative flint. These chromatic errors of systems, which are achromatic for two colors, are called the secondary spectrum, and depend upon the aperture and focal length in the same manner as the primary chromatic errors do. In fig. 6, taken from M. von Rohr's Theorie und Geschichte des photographischen Objectivs, the abscissae are focal lengths, and the ordinates wavelengths. The Fraunhofer lines used are shown in adjacent table. The focal lengths are made equal for the lines C and F. In the neighborhood of 550 nm the tangent to the curve is parallel to the axis of wavelengths; and the focal length varies least over a fairly large range of color, therefore in this neighborhood the color union is at its best. Moreover, this region of the spectrum is that which appears brightest to the human eye, and consequently this curve of the secondary on spectrum, obtained by making , is, according to the experiments of Sir G. G. Stokes (Proc. Roy. Soc., 1878), the most suitable for visual instruments (optical achromatism,). In a similar manner, for systems used in photography, the vertex of the color curve must be placed in the position of the maximum sensibility of the plates; this is generally supposed to be at G'; and to accomplish this the F and violet mercury lines are united. This artifice is specially adopted in objectives for astronomical photography (pure actinic achromatism). For ordinary photography, however, there is this disadvantage: the image on the focusing-screen and the correct adjustment of the photographic sensitive plate are not in register; in astronomical photography this difference is constant, but in other kinds it depends on the distance of the objects. On this account the lines D and G' are united for ordinary photographic objectives; the optical as well as the actinic image is chromatically inferior, but both lie in the same place; and consequently the best correction lies in F (this is known as the actinic correction or freedom from chemical focus). Should there be in two lenses in contact the same focal lengths for three colours a, b, and c, i.e. , then the relative partial dispersion must be equal for the two kinds of glass employed. This follows by considering equation (4) for the two pairs of colors ac and bc. Until recently no glasses were known with a proportional degree of absorption; but R. Blair (Trans. Edin. Soc., 1791, 3, p. 3), P. Barlow, and F. S. Archer overcame the difficulty by constructing fluid lenses between glass walls. Fraunhofer prepared glasses which reduced the secondary spectrum; but permanent success was only assured on the introduction of the Jena glasses by E. Abbe and O. Schott. In using glasses not having proportional dispersion, the deviation of a third colour can be eliminated by two lenses, if an interval be allowed between them; or by three lenses in contact, which may not all consist of the old glasses. In uniting three colors an achromatism of a higher order is derived; there is yet a residual tertiary spectrum, but it can always be neglected. The Gaussian theory is only an approximation; monochromatic or spherical aberrations still occur, which will be different for different colors; and should they be compensated for one color, the image of another color would prove disturbing. The most important is the chromatic difference of aberration of the axis point, which is still present to disturb the image, after par-axial rays of different colors are united by an appropriate combination of glasses. If a collective system be corrected for the axis point for a definite wavelength, then, on account of the greater dispersion in the negative components — the flint glasses, — overcorrection will arise for the shorter wavelengths (this being the error of the negative components), and under-correction for the longer wavelengths (the error of crown glass lenses preponderating in the red). This error was treated by Jean le Rond d'Alembert, and, in special detail, by C. F. Gauss. It increases rapidly with the aperture, and is more important with medium apertures than the secondary spectrum of par-axial rays; consequently, spherical aberration must be eliminated for two colors, and if this be impossible, then it must be eliminated for those particular wavelengths which are most effectual for the instrument in question (a graphical representation of this error is given in M. von Rohr, Theorie und Geschichte des photographischen Objectivs). The condition for the reproduction of a surface element in the place of a sharply reproduced point — the constant of the sine relationship must also be fulfilled with large apertures for several colors. E. Abbe succeeded in computing microscope objectives free from error of the axis point and satisfying the sine condition for several colors, which therefore, according to his definition, were aplanatic for several colors; such systems he termed apochromatic. While, however, the magnification of the individual zones is the same, it is not the same for red as for blue; and there is a chromatic difference of magnification. This is produced in the same amount, but in the opposite sense, by the oculars, which Abbe used with these objectives (compensating oculars), so that it is eliminated in the image of the whole microscope. The best telescope objectives, and photographic objectives intended for three-color work, are also apochromatic, even if they do not possess quite the same quality of correction as microscope objectives do. The chromatic differences of other errors of reproduction seldom have practical importance. See also Aberrations of the eye Optical telescope#The five Seidel aberrations Wavefront coding References External links Microscope Objectives: Optical Aberrations section of Molecular Expressions website, Michael W. Davidson, Mortimer Abramowitz, Olympus America Inc., and The Florida State University Geometrical optics

2705

https://en.wikipedia.org/wiki/Amy%20Grant

Amy Grant

Amy Lee Grant (born November 25, 1960) is an American singer, songwriter and musician. She started in contemporary Christian music (CCM) before a successful crossover to pop music in the 1980s and 1990s. She has been referred to as "The Queen of Christian Pop". , she had sold more than 30 million albums worldwide, won six Grammy Awards, 22 Gospel Music Association Dove Awards, and had the first Christian album to go Platinum. She was honored with a star on Hollywood Walk of Fame in 2006 for her contributions to the entertainment industry. Grant made her debut as a teenager and gained fame in Christian music during the 1980s with such hits as "Father's Eyes", "El Shaddai", and "Angels". In the mid-1980s, she began broadening her audience and soon became one of the first CCM artists to cross over into mainstream pop on the heels of her successful albums Unguarded and Lead Me On. In 1986, she scored her first Billboard Hot 100 No. 1 song in a duet with Peter Cetera, "The Next Time I Fall". In 1991, she released the blockbuster album Heart in Motion which became her best-selling album to date, topping the Billboard Christian album chart for 32 weeks, selling five million copies in the U.S., and producing her second No. 1 pop single "Baby Baby". She is the author of several books, including a memoir, Mosaic: Pieces of My Life So Far, and a book based on the popular Christmas song "Breath of Heaven (Mary's Song)" that she co-wrote. Background Early life and career Born in Augusta, Georgia, Grant is the youngest of four sisters. Her family settled in Nashville, Tennessee, in 1967. She is a great-granddaughter of Nashville philanthropist A. M. Burton (founder of Life and Casualty Insurance Company, eponym of Nashville's Life & Casualty Tower, WLAC Radio, and WLAC-TV) and Lillie Burton. She has acknowledged the influence of the Burtons on her development as a musician, starting with their common membership in Nashville's Ashwood Church of Christ. In 1976, Grant wrote her first song ("Mountain Top"), performed in public for the first time at Harpeth Hall School, the all-girls school she attended in Nashville. She recorded a demo tape for her parents with church youth-leader Brown Bannister. When Bannister was dubbing a copy of the tape, Chris Christian, the owner of the recording studio, heard the demo and called Word Records. He played it over the phone, and she was offered a recording contract, five weeks before her 16th birthday. In 1977, she recorded her first album, Amy Grant, produced by Brown Bannister, who would also produce her next 11 albums. It was released in early 1978, one month before her high-school graduation. Toward the end of 1978 she performed her first ticketed concert after beginning her first year at Furman University. In May 1979, while at the album-release party for her second album, My Father's Eyes, Grant met Gary Chapman, who had written the title track and would become her first husband. Grant and Chapman toured together in mid-1979. In late 1980, she transferred to Vanderbilt University, where she was a member of the sorority Kappa Alpha Theta. Grant then made a few more albums before dropping out of college to pursue a career in music—Never Alone, followed by a pair of live albums in 1981 (In Concert and In Concert Volume Two), both backed by an augmented edition of the DeGarmo & Key band. It was during these early shows that Grant also established one of her concert trademarks: performing barefoot. To date, Grant continues to take off her shoes midway through performances, as she has said, "it is just more comfortable." 1982 saw the release of her breakthrough album Age to Age. The album contains the signature track, "El Shaddai" (written by Michael Card) and the Grant-Chapman penned song, "In a Little While". "El Shaddai" was later awarded one of the "Songs of the Century" by the RIAA in 2001. Grant received her first Grammy Award for Best Contemporary Gospel Performance, as well as two GMA Dove Awards for Gospel Artist of the Year and Pop/Contemporary Album of the Year. Age to Age became the first Christian album by a solo artist to be certified gold (1983) and the first Christian album to be certified platinum (1985). In the mid-1980s, Grant began touring and recording with young up-and-coming songwriter Michael W. Smith. Grant and Smith continue to have a strong friendship and creative relationship, often writing songs for or contributing vocals to each other's albums, and as of 2019, often touring together annually during November and December putting on Christmas concerts. During the 1980s, Grant was also a backup singer for Bill Gaither. Grant followed this album with the first of her Christmas albums, which would later be the basis for her holiday shows. In 1984, she released another pop-oriented Christian hit, Straight Ahead, earning Grant her first appearance at the Grammy Awards show in 1985. The head of NBC took notice of Grant's performance and called her manager to book her for her own Christmas special. Widening audience Hardly had Grant established herself as the "Queen of Christian Pop" when she changed directions to widen her fan base (and hence her musical message). Her goal was to become the first Christian singer-songwriter who was also successful as a contemporary pop singer. Unguarded (1985) surprised some fans for its very mainstream sound (and Grant's leopard-print jacket, in four poses for four different covers). "Find a Way", from Unguarded, became one of the few non-Christmas Christian songs to hit the Billboard Top 40 list, also reaching No. 7 on the Adult Contemporary chart. She also scored No. 18 on Billboard AC in 1986 with "Stay for Awhile". Grant scored her first Billboard No. 1 song in 1986 with "The Next Time I Fall", a duet with former Chicago singer/bassist Peter Cetera. That year, she also recorded a duet with singer Randy Stonehill for his Love Beyond Reason album, titled "I Could Never Say Goodbye", and recorded The Animals' Christmas with Art Garfunkel. Lead Me On (1988) contained many songs that were about Christianity and love relationships, but some interpreted it as not being an obviously "Christian" record. Years later, Lead Me On would be chosen as the greatest Contemporary Christian album of all time by CCM Magazine. The mainstream song "Saved by Love" was a minor hit, receiving airplay on radio stations featuring the newly emerging Adult Contemporary format. The album's title song received some pop radio airplay and crossed over to No. 96 on the Billboard Hot 100, and "1974 (We Were Young)" and "Saved By Love" also charted as Adult Contemporary songs. In 1989, she appeared in a Target ad campaign, performing songs off the album. In the mainstream When Heart in Motion was released in 1991, many fans were surprised that the album was so clearly one of contemporary pop music. Grant's desire to widen her audience was frowned upon by the confines of the popular definitions of ministry at the time. The track "Baby Baby" (written for Grant's newborn daughter Millie, of whom Grant wrote, her "six-week-old face was my inspiration") became a pop hit (hitting No. 1 on the Billboard Hot 100), and Grant was established as a name in the mainstream music world. "Baby Baby" received Grammy nominations for Best Female Pop Vocal Performance, and Record and Song of the Year (although it failed to win in any of those categories). Four other hits from the album made the Pop top 20: "Every Heartbeat" (No. 2), "That's What Love Is For" (No. 7), "Good for Me" (No. 8), and "I Will Remember You" (No. 20). On the Adult Contemporary chart, all five songs were top 10 hits, with two of the five ("Baby Baby" and "That's What Love Is For") reaching No. 1. Many Christian fans remained loyal, putting the album atop Billboard Contemporary Christian Chart for 32 weeks. Heart in Motion is Grant's best-selling album, having sold over five million copies according to the RIAA. Grant followed the album with her second Christmas album, Home For Christmas in 1992, which included the song "Breath of Heaven (Mary's Song)", written by Chris Eaton and Grant, and would later be covered by many artists, including Donna Summer, Jessica Simpson (who acknowledged Grant as one of her favorite artists), Vince Gill, Sara Groves, Point of Grace, Gladys Knight, and Broadway star Barbara Cook. House of Love in 1994 continued in the same vein, boasting catchy pop songs mingled with spiritual lyrics. The album was a multi-platinum success and produced the pop hit "Lucky One" (No. 18 pop and No. 2 AC; No. 1 on Radio & Records) as well as the title track (a duet with country music star and future husband Vince Gill) (No. 37 pop) and a cover of Joni Mitchell's frequently covered "Big Yellow Taxi" (No. 67 pop) (in which she changed the line "And they charged the people a dollar and a half just to see'em" to "And then they charged the people 25 bucks just to see'em"). After she covered the 10cc song "The Things We Do for Love" for the Mr. Wrong soundtrack, Behind the Eyes was released in September 1997. The album struck a much darker note, leaning more towards downtempo, acoustic soft-rock songs, with more mature (yet still optimistic) lyrics. She called it her "razor blades and Prozac" album. Although "Takes a Little Time" was a moderate hit single, the album failed to sell like the previous two albums, which had both gone multi-platinum. Behind The Eyes was eventually certified Gold by the RIAA. The video for "Takes a Little Time" was a new direction for Grant; with a blue light filter, acoustic guitar, the streets and characters of New York City, and a plot, Grant was re-cast as an adult light rocker. She followed up "Behind The Eyes" with A Christmas To Remember, her third Christmas album, in 1999. The album was certified Gold in 2000. Following the 9/11 attacks, Grant's "I Will Remember You" saw a resurgence in popularity as many radio DJs mixed a special tribute version of the song. That same year, Grant won $125,000 for charity on the "Rock Star Edition" of Who Wants to Be a Millionaire? Return to her roots Grant returned to her roots with the 2002 release of an album of hymns titled Legacy... Hymns and Faith. The album featured a Vince Gill-influenced mix of bluegrass and pop and marked Grant's 25th anniversary in the music industry. Grant followed this up with Simple Things in 2003. The album did not have the success of her previous pop or gospel efforts. Soon after Simple Things, Grant and Interscope/A&M parted ways. The same year, Grant was inducted into the Gospel Music Hall of Fame by the Gospel Music Association, an industry trade organization of which she is a longstanding member, in her first year of eligibility. Grant released a sequel in 2005 titled Rock of Ages...Hymns and Faith. Grant joined the reality television phenomenon by hosting Three Wishes, a show in which she and a team of helpers make wishes come true for small-town residents. The show debuted on NBC in the fall of 2005 but was canceled at the end of its first season because of high production costs. After Three Wishes was canceled, Grant won her 6th Grammy Award for Rock of Ages... Hymns & Faith. In a February 2006 webchat, Grant stated she believes her "best music is still ahead". In April 2006, a live CD/DVD titled Time Again... Amy Grant Live was recorded in Fort Worth, Texas, at Bass Performance Hall. (Grant's first paid public performance was at the Will Rogers Auditorium in Fort Worth.) The concert was released on September 26, 2006. In addition to receiving a star on the Hollywood Walk of Fame, media appearances included write-ups in CCM Magazine, and a performance on The View. In a February 2007 web chat on her web site, Grant discussed a book she was working on titled Mosaic: Pieces of My Life So Far, saying, "It's not an autobiography, but more a collection of memories, song lyrics, poetry and a few pictures." The book was released on October 16, 2007. In November, it debuted at No. 35 on the New York Times Best Seller list. In the same web chat, Grant noted that she is "anxious to get back in the studio after the book is finished, and reinvent myself as an almost-50 performing woman". 2007 was Grant's 30th year in music. She left Word/Warner, and contracted with EMI CMG who re-released her regular studio albums as remastered versions on August 14, 2007. Marking the start of Grant's new contract is a career-spanning greatest hits album, with all the songs digitally remastered. The album was released as both a single-disc CD edition, and a two-disc CD/DVD Special Edition, the DVD featuring music videos and interviews. Grant appeared with Gill on The Oprah Winfrey Show for a holiday special in December 2007. Grant has plans to appear on CMT, a Food Network special, the Gospel Music Channel, and The Hour of Power. In February 2008, Grant joined the writing team from Compassionart as a guest vocalist at the Abbey Road studios, London, to record a song called "Highly Favoured", which was included on the album CompassionArt. On June 24, 2008, Grant re-released her 1988 album, Lead Me On, in honor of its 20th anniversary. The two-disc release includes the original album and a second disc with new acoustic recordings, live performances from 1989, and interviews with Amy. Grant recreated the Lead Me On tour in the fall of 2008. On June 27, 2008, at Creation Festival Northeast she performed "Lead Me On" and a few other songs backed by Hawk Nelson. At the end of the concert, Grant returned to the stage and sang "Thy Word". She appeared on the 2008 album Anne Murray Duets: Friends & Legends singing "Could I Have This Dance". On May 5, 2009, Grant released an EP containing two new songs, "She Colors My Day", and "Unafraid", as well as the previously released songs "Baby Baby" and "Oh How the Years Go By". The EP, exclusively through iTunes, benefited the Entertainment Industry Foundation's (EIF) Women's Cancer Research Fund. In 2010, Grant released Somewhere Down the Road, featuring the hit single "Better Than a Hallelujah", which peaked at No. 8 on Billboard Top Christian Songs chart. When asked about the new album during an interview with CBN.com, Grant says, "... my hope is just for those songs to provide companionship, remind myself and whoever else is listening what's important. I feel like songs have the ability to connect us to ourselves and to each other, and to our faith, to the love of Jesus, in a way that conversation doesn't do. Songs kind of slip in and move you before you realize it." In September 2012, Grant took part in a campaign called "30 Songs / 30 Days" to support Half the Sky: Turning Oppression into Opportunity for Women Worldwide, a multi-platform media project inspired by Nicholas Kristof and Sheryl WuDunn's book. Grant's next album, How Mercy Looks from Here, was released on May 14, 2013, and was produced by Marshall Altman. The album reached No. 12 on the Billboard 200 chart, making it her highest-charting album since 1997's Behind the Eyes. Two singles were released from the album: "Don't Try So Hard" and "If I Could See", both of which charted on the US Billboard Hot Christian Songs chart. On August 19, 2014, she released an album of hits remixed by well known engineers and DJs. The album was titled In Motion: The Remixes. It charted at 110 on the US Billboard 200 chart and at No. 5 on the US Dance chart. To promote the album, several new remix EPs were released on iTunes the following month including "Find a Way, "Stay for Awhile", "Baby Baby, "Every Heartbeat" and "That's What Love Is For". Due to club play of the remixes of "Baby Baby" and "Every Heartbeat", they charted at No. 3 and 13, respectively on the U.S. Dance Chart. This marked her first appearance on that chart in 23 years. On September 30, 2014, Grant released a new single titled "Welcome Yourself". In honor of Breast Cancer Awareness Month, proceeds of the single go to breast cancer research. On February 12, 2015, she announced a new compilation album titled Be Still and Know... Hymns & Faith, to be released. The album was released on April 14, 2015, and charted at No. 7 in the U.S. on the Billboard Christian Albums chart. . Grant released a Christmas album on October 21, 2016, Tennessee Christmas, which is a combination of classic Christmas songs and original material. It charted in the U.S. at No. 31 on the Billboard 200 and at No. 3 on the Billboard Top Holiday Albums chart. The single from the album, "To Be Together", reached No. 32 on the Hot Christian Songs chart and No. 19 on the Holiday Digital Song Sales chart. She supported the album with a series of Christmas concerts with Vince Gill at the Ryman Auditorium. She also toured the U.S. and Canada with Christmas concerts accompanied by Michael W. Smith and season 9 winner of The Voice, Jordan Smith. In February 2017, she released a new song, "Say It With a Kiss", with accompanying video. During November and December 2017, Grant performed another series of Christmas concerts with Vince Gill at the Ryman and embarked on another U.S. and Canada Christmas tour with Michael W. Smith and Jordan Smith. Personal life On June 19, 1982, Grant married fellow Christian musician Gary Chapman. Their marriage produced three children. In March 1999, she filed for divorce from Chapman, citing "irreconcilable differences", and the divorce was finalized three months later. On March 10, 2000, Grant married country singer-songwriter Vince Gill, who had been previously married to country singer Janis Oliver of Sweethearts of the Rodeo. Grant and Gill have one daughter together, Corrina Grant Gill, born March 12, 2001. In the November 1999 CCM Magazine, Grant explained why she left Chapman and married Gill: In June 2020, Grant had heart surgery to repair partial anomalous pulmonary venous return (PAPVR), a congenital heart condition. Public views and perception Along with praise for her contributions to the Contemporary Christian genre, Grant has also generated controversy within the Christian community, from "complaints that she was too worldly and too sexy" to a "barrage of condemnation" following her divorce and remarriage. In an interview early in her career, Grant stated, "I have a healthy sense of right and wrong, but sometimes, for example, using foul, exclamation-point words among friends can be good for a laugh." The article which was based on that interview was constructed in such a manner so as to make it appear as though Grant condoned premarital sex. Later Grant reflected on how the article misrepresented her views, stating: "We probably talked for two hours about sexual purity, but when the interview finally came out he worded it in such a way that it sounded like I condoned premarital sex. So I picked up that article and thought, 'You've made me say something I've never said, and you've totally disregarded two hours of Bible put in one flippant comment that I made about a moan.'" Discography Bibliography Amy Grant's Heart to Heart Bible Stories; Worthy Pub (1985), Breath of Heaven (Mary's Song); W Publishing Group (2001), "The Creation" (narrator), in Rabbit Ears Beloved Bible Stories: the Creation, Noah and the Ark (audio book); Listening Library (Audio) (2006), Mosaic: Pieces of My Life So Far; Flying Dolphin Press (2007), Awards and achievements Grammy Awards Wins 1982: Best Gospel Performance, Contemporary or Inspirational – Age to Age 1983: Best Gospel Performance, Female – "Ageless Medley" 1984: Best Gospel Performance, Female – "Angels" 1985: Best Gospel Performance, Female – Unguarded 1988: Best Gospel Performance, Female – Lead Me On 2005: Best Southern, Country, or Bluegrass Gospel Album – Rock of Ages...Hymns & Faith Nominations GMA Dove Awards Special awards and recognitions 1992: Junior Chamber of Commerce Young Tennessean of the Year 1994: St. John University Pax Christi Award 1994: Nashville Symphony Harmony Award 1996: Sarah Cannon Humanitarian Award – TNN Awards 1996: Minnie Pearl Humanitarian Award – Columbia Hospital 1996: Voice of America Award – ASCAP 1996: Academy of Achievement Golden Plate Award 1999: "An Evening with the Arts" Honor – The Nashville Chamber of Commerce, Nashville Symphony, and Tennessee Performing Arts Center 1999: The Amy Grant Room for Music and Entertainment – The Target House at St. Jude's Children's Hospital 2001: Easter Seals Nashvillian of the Year Award 2003: Inducted into the GMA Gospel Music Hall of Fame 2003: Summit Award – Seminar in the Rockies 2006: Amy Grant Performance Platform – Nashville Schermerhorn Symphony Center 2006: Hollywood Walk of Fame star unveiled 2007: Charter member of Tiffany Circle – Red Cross 2007: Inducted into the Christian Music Hall of Fame 2008: Class of 1966 Friend of West Point award with Vince Gill 2012: Honorary Doctorate Degree of Music and Performance – Grand Canyon University 2015: No. 52 in The Top 100 Female Artists of the Rock Era (1955–2015) References External links 1960 births A&M Records artists American child singers American members of the Churches of Christ American mezzo-sopranos American performers of Christian music American pop rock singers American women pop singers American soft rock musicians Christian music songwriters Christians from Tennessee Furman University alumni Grammy Award winners Living people Musicians from Augusta, Georgia People from Nashville, Tennessee People with congenital heart defects Performers of contemporary Christian music Sparrow Records artists Vanderbilt University alumni Ward–Belmont College alumni Word Records artists Writers from Augusta, Georgia 20th-century American women singers 20th-century American singers 21st-century American women singers 21st-century American singers

2707

https://en.wikipedia.org/wiki/Arthur%20William%20%C3%A0%20Beckett

Arthur William à Beckett

Arthur William à Beckett (25 October 1844 – 14 January 1909) was an English journalist and intellectual. Biography He was a younger son of Gilbert Abbott à Beckett and Mary Anne à Beckett, brother of Gilbert Arthur à Beckett and educated at Felsted School. Besides fulfilling other journalistic engagements, Beckett was on the staff of Punch from 1874 to 1902, edited the Sunday Times 1891–1895, and the Naval and Military Magazine in 1896. He gave an account of his father and his own reminiscences in The à Becketts of Punch (1903). A childhood friend (and distant relative) of W. S. Gilbert, Beckett briefly feuded with Gilbert in 1869, but the two patched up the friendship, and Gilbert even later collaborated on projects with Beckett's brother. He was married to Suzanne Frances Winslow, daughter of the noted psychiatrist Forbes Benignus Winslow. Works He published: Comic Guide to the Royal Academy, with his brother Gilbert (1863–64) Fallen Amongst Thieves (1869) Our Holiday in the Highlands (1874) The Shadow Witness and The Doom of Saint Quirec, with Francis Burnand (1875–76) The Ghost of Greystone Grange (1877) The Mystery of Mostyn Manor (1878) Traded Out; Hard Luck; Stone Broke; Papers from Pump Handle Court, by a Briefless Barrister (1884) Modern Arabian Nights (1885) The Member for Wrottenborough (1895) Greenroom Recollections (1896) The Modern Adam (1899) London at the End of the Century (1900) With F. C. Burnand he co-authored: The Doom of St. Querec (1875) The Shadow Witness (1876) He wrote for the theatre two three-act comedies: L.S.D. (Royalty Theatre, 1872); About Town (Court Theatre, 1873, it ran for over 150 nights); and On Strike (Court Theatre, 1873, a domestic drama in one act) ; Faded Flowers (The Haymarket); Long Ago (Royalty Theatre, 1882); From Father to Son (Liverpool, 1881, a dramatised version of his novel Fallen among Thieves written in 3 acts in cooperation with J. Palgrave Simpson). Notes References External links 1844 births 1909 deaths English male journalists English humorists

2709

https://en.wikipedia.org/wiki/Aberdeen%2C%20South%20Dakota

Aberdeen, South Dakota

Aberdeen (Lakota: Ablíla) is a city in and the county seat of Brown County, South Dakota, United States, located approximately northeast of Pierre. The city population was 28,495 at the 2020 census, making it the third most populous city in the state after Sioux Falls and Rapid City. Aberdeen is the principal city of the Aberdeen Micropolitan Statistical Area, which includes all of Brown and Edmunds counties and has a population of 40,602 in 2010. Aberdeen is considered a college town, being the home of both Northern State University and Presentation College. History Settlement Before Aberdeen or Brown County was inhabited by European settlers, it was inhabited by the Sioux Indians from approximately 1700 to 1879. Europeans entered the region for business, founding fur trading posts during the 1820s; these trading posts operated until the mid-1830s. The first "settlers" of this region were the Arikara Indians, but they would later be joined by others. The first group of Euro-American settlers to reach the area that is now Brown County was a party of four people, three horses, two mules, fifteen cattle, and two wagons. This group of settlers was later joined by another group the following spring, and, eventually, more settlers migrated toward this general area, currently known as Columbia, South Dakota. This town was established on June 15, 1879, was settled in 1880, and was incorporated in 1882. Creation of the town Aberdeen, like many towns of the Midwest, was built around the newly developing railroad systems. Aberdeen was first officially plotted as a town site on January 3, 1881, by Charles Prior, the superintendent of the Minneapolis office of the Chicago, Milwaukee, and St. Paul Railroad, or the Milwaukee Road for short, which was presided over by Alexander Mitchell. Mitchell, Charles Prior's boss, was responsible for the choice of town names, was born in Aberdeen, Scotland, after which the town of Aberdeen, South Dakota, was named. Aberdeen was officially founded on July 6, 1881, the date of the first arrival of a Milwaukee Railroad train. Aberdeen then operated under a city charter granted by the Territorial Legislature in March 1883. As Aberdeen grew, many businesses and buildings were constructed along Aberdeen's Main Street. However, this soon became a problem due to Aberdeen's periodic flooding, which led to it being referred to as "The Town in the Frog Pond". At first, this unique condition presented no problem to the newly constructed buildings because it had not rained very much but, when heavy rains fell, the Pond reappeared and flooded the basements of every building on Main Street, causing many business owners and home owners much turmoil. When this flooding happened, the city had one steam-powered pump that had to be used to dry out the entire area that had been flooded, which would take days, if not weeks – and more often than not, it would have rained again in this time period and caused even more flooding, even in the basements that had already been emptied of the water. When the water was gone from the basements, the city still had to deal with the mud that also resulted from the heavy rains. The city decided in 1882 to build an artesian ditch to control the "Frog Pond" effects; the plan was later upgraded and developed into an artesian well in 1884 to combat the heavy rains and keep the basements from flooding. The artesian well was designed by the city engineers to prevent flooding and develop a water system. However, during the digging of the well, the water stream that was found underground was too powerful to be contained. The water came blasting out with violent force and had the entire Main Street submerged in up to four feet of water. The engineers realized the previous flaws of the artesian well plan and soon added a gate valve to the well to control the flow of water, giving Aberdeen its first working water supply. Aberdeen had four different railroad companies with depots built in the newly developing town. With these four railroads intersecting here, Aberdeen soon became known as the "Hub City of the Dakotas". When looking down on Aberdeen from above, the railroad tracks converging in Aberdeen resembled the spokes of a wheel converging at a hub, hence the name "Hub City of the Dakotas". These four railroad companies are the reason why Aberdeen was able to grow and flourish as it did. The only railroad still running through Aberdeen is the BNSF Railway. L. Frank Baum, who was later author of the book The Wizard of Oz and its many sequels, lived here with his wife and children for a few years in the early 1890s. He owned a store for over a year, which failed. He later published one of the city's then nine newspapers. The city's small amusement park has some features reflective of the Wizard of Oz series. After his sojourn in Aberdeen he moved to Chicago, Illinois in 1892. 1999 South Dakota Learjet crash On October 25, 1999, a Learjet 35 carrying golfing star Payne Stewart and five others crashed in a field near Mina, west of Aberdeen. All on board died. Geography Aberdeen is located in northeastern South Dakota, in the James River valley, approximately west of the river. The James River enters northeastern South Dakota in Brown County, where it is dammed to form two reservoirs northeast of Aberdeen. The city is bisected by Moccasin Creek, a slow-moving waterway which flows south and then northeast to the James River. According to the United States Census Bureau, the city has a total area of , of which is land and is water. Aberdeen has been assigned the ZIP code range 57401−57402. Climate Aberdeen experiences a humid continental climate (Köppen Dfb/Dfa) influenced by its position far from moderating bodies of water. This brings four distinct seasons, a phenomenon that is characterized by hot, relatively humid summers and cold, dry winters, and it lies in USDA Hardiness Zone 4b. The monthly daily average temperature ranges from in January to in July, while there are 16 days of + highs and 38 days with sub- lows annually. Snowfall occurs mostly in light to moderate amounts during the winter, totaling . Precipitation, at annually, is concentrated in the warmer months. Extreme temperatures have ranged from on January 12, 1912, and February 8, 1895, to on July 6 and 15, 1936, although a reading occurred as recently as January 15, 2009. The National Oceanographic and Atmospheric Administration maintains a National Weather Service office in Aberdeen. Their area of responsibility includes northern and eastern South Dakota and two counties in west-central Minnesota. Demographics 2010 census At the 2010 census, there were 26,091 people, 11,418 households and 6,354 families residing in the city. The population density was . There were 12,158 housing units at an average density of . The racial make-up was 91.8% White, 0.7% African American, 3.6% Native American, 1.3% Asian, 0.2% Pacific Islander, 0.5% from other races and 2.0% from two or more races. Hispanic or Latino of any race were 1.6% of the population. There were 11,418 households, of which 27.1% had children under the age of 18 living with them, 42.1% were married couples living together, 9.5% had a female householder with no husband present, 4.0% had a male householder with no wife present, and 44.4% were non-families. 36.9% of all households were made up of individuals, and 13.1% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.86. The median age was 36.4 years. 22.2% of residents were under the age of 18; 12.8% were between the ages of 18 and 24; 24.1% were from 25 to 44; 24.4% were from 45 to 64; 16.4% were 65 years of age or older. The gender make-up of the city was 47.6% male and 52.4% female. 2000 census At the 2000 census, there were 24,658 people, 10,553 households and 6,184 families residing in the city. The population density was . There were 11,259 housing units at an average density of . The racial make-up of the city was 94.61% White, 0.37% Black or African American, 3.17% Native American, 0.54% Asian, 0.13% Pacific Islander, 0.19% from other races and 0.99% from two or more races. 0.79% of the population were Hispanic or Latino of any race. 53.7% were of German, 15% Norwegian and 8.5% Irish ancestry. There were 10,553 households, of which 27.3% had children under the age of 18 living with them, 47.0% were married couples living together, 8.9% had a female householder with no husband present, and 41.4% were non-families. 34.9% of all households were made up of individuals, and 13.6% had someone living alone who was 65 years of age or older. The average household size was 2.21 and the average family size was 2.86. 21.8% of the population were under the age of 18, 14.1% from 18 to 24, 26.4% from 25 to 44, 20.4% from 45 to 64, and 17.2% were 65 years of age or older. The median age was 36 years. For every 100 females, there were 89.2 males. For every 100 females age 18 and over, there were 85.3 males. The median household income was $33,276 and the median family income was $43,882. Males had a median income of $30,355 and females $20,092. The per capita income was $17,923. About 7.6% of families and 10.5% of the population were below the poverty line, including 10.6% of those under age 18 and 10.1% of those age 65 or over. Religion There are several Roman Catholic, Baptist, Lutheran, Methodist, Pentecostal, Church of Jesus Christ of Latter-day Saints churches in the area, as well as one synagogue. Economy Major employers Super 8 Motels Super 8 Motels was founded in 1972 by Dennis Brown and Ron Rivett as a motel referral system, which was replaced with a franchise operation in 1973. The first Super 8, with 60 rooms, was opened in 1974 in Aberdeen and still operates today as the Super 8 Aberdeen East. Arts and culture The Aberdeen area has several cultural organizations. The Aberdeen Area Arts Council publishes a small monthly newspaper, ARTiFACTS, with information on area events. The Aberdeen Community Theatre was created in 1979 and performs at the Capitol Theatre in downtown Aberdeen. The Capitol Theatre opened in 1927 and donated to the Aberdeen Community Theatre in 1991; since then more than $963,000 has been spent on renovating and preserving the historical aspect of the Capitol Theatre. Today, the Aberdeen Community Theatre performs five mainstage productions and three youth productions per year. The South Dakota Film Festival established in 2007 is held annually in the fall. The festival has been host to Kevin Costner, Graham Greene, Adam Greenberg, CSA and many more stars of film and television. The festival's first feature film screened was Into The Wild, shot partially in SD. The festival is held at the historic Capitol Theatre. The Northern State University Theater Department puts on plays during the school year. The ArtWorks Cooperative is a partnership of artists who work to market their artwork in a gallery setting. The ArtWorks Cooperative sells artists' work and provides an environment that will benefit the artist in terms of artist-to-artist communication, and public interest. There are four galleries in Aberdeen: Presentation College's Wein Gallery, Northern State University's Lincoln Gallery, the Aberdeen Recreation & Cultural Center (ARCC) Gallery and the ArtWorks Cooperative Gallery located in The Aberdeen Mall. Sports Bowling The Village Bowl in Aberdeen is a modern bowling center with multiple lanes. Located at 1314 8th Ave. NW. Minor league baseball Aberdeen has had three minor league baseball teams since 1920. The Aberdeen Boosters, a class D league team, played in 1920, the Aberdeen Grays, also a class D team, played from 1921 to 1923. The class C Aberdeen Pheasants from 1946 to 1971, and 1995 to 1997. The Pheasants were the affiliate of the former St. Louis Browns (and current Baltimore Orioles). Aberdeen was a stop to the majors for such notable players as Don Larsen (perfect game in the World Series), Lou Piniella (AL rookie of the year with Kansas City Royals in 1969), and Jim Palmer, Baseball Hall of Fame pitcher for the Baltimore Orioles. Tennis Aberdeen has 19 public tennis courts throughout the city – Melgaard Park (4), Northern State University (6), and Holgate Middle School (8). Micah Hanson won the 2006 C.C. Lee Tennis championship in what many spectators called, the match of the century. Golf Aberdeen has three golf courses: Lee Park Municipal Golf Course, Moccasin Creek Country Club and Rolling Hills Country Club. Lee Park and Moccasin Creek are both 18-hole courses. Rolling Hills is a combined nine-hole course and housing development which opened in 2005. Hockey/ice skating Aberdeen has several outdoor skating rinks and hockey rinks open to the public during winter months. Aberdeen is also home to the NAHL team, Aberdeen Wings. Skateboarding/rollerblading Aberdeen has a skate park located between East Melgaard Road and 17th Ave SE at Melgaard Park. The equipment installed includes a quarter pipe, penalty box with half pyramid, bank ramp, spine, kinked rail and a ground rail. Disc golf Aberdeen has two disc golf courses, Melgaard Park, and the Richmond Lake Disc Golf Course. Roller Derby Aberdeen has an All-women's Roller Derby league "A-Town Roller Girlz" established in 2011, also bringing Junior Roller Derby to the area. A men's league is to follow in the midst of interest in the dynamic of the sport. Parks and recreation Aberdeen Family YMCA The full service YMCA includes an aquatic center with a competitive size lap pool, zero depth entry recreation pool with play features and hot tub. There are three gyms one of which has a climbing wall. There are two racquetball courts. Saunas and steam rooms are in the men's and women's locker rooms. Over 100 group fitness classes are offered each week with child watch available (short term childcare). A wellness center that has cardio equipment, weight machines and free weights. Family Aquatic Center Completed in the summer of 2007, this complex includes a zero entry pool, competition lap pool, lazy river, numerous water slides, play sand area, and a concession area. Wylie Park Recreation Area Wylie Park Recreation Area features go-kart racing, sand volleyball courts, access to Wylie Lake, camping area, picnic areas, and is connected to Storybook Land. Wylie Lake is a small man-made lake, open in the summer months for swimming, lying on the beach, and paddle boating. Storybook Land Storybook Land is a park with attractions from several different children's storybooks. The park contains a castle, as well as a train that takes visitors through the park. There are two barns which contain petting zoos. Humpty Dumpty's Great Fall Roller Coaster was added to the park, summer 2015. Newly added is the Land of Oz, that features characters and attractions from L. Frank Baum's The Wonderful Wizard of Oz. Baum was a resident of Aberdeen in the 1880s. He left after a severe drought led to the failure of first, his variety store Baum's Bazaar, and then his newspaper The Aberdeen Saturday Pioneer, where he wrote an opinion column, Our Landlady. Kuhnert Arboretum The Kuhnert Arboretum provides many new learning experiences for the residents of the Aberdeen area, including school-aged children. The Arboretum offers environmental education, a children's area, rose garden collection, recreational trails and much more. Richmond Lake Recreation Area The Richmond Lake Recreation Area is used by all types of outdoors enthusiasts. Three separate areas in this park cater to the needs of campers, swimmers, naturalists, boaters and anglers. Campers stay in the South Unit, while the Forest Drive Unit is a great place for wildlife viewing. The Boat Ramp Unit provides access to the more than lake. Richmond Lake Recreation Area's small campground offers a quiet camping experience. The park also features a wheelchair accessible camping cabin. The park's extensive trail system features over of trails, including both accessible and interpretive trails. Hikers, bikers, and horseback riders can observe the abundance of prairie plants and wildlife of the area up-close. The park has multiple private and public boat ramps as well as an accessible fishing dock. Richmond Lake has a population of walleye, northern pike, bass, perch, crappie, bluegill, catfish, and bullheads within its waters. An entrance fee is required to gain access to the water and park itself. Government Aberdeen is the center of government for Brown County. City government is overseen by a mayor/city manager and eight council members. The city council is composed of Mayor Travis Schaunaman, City Manager Joe Gaa, and council members Dave Lunzman, Josh Rife, Mark Remily, Rob Ronayne, Alan Johnson, Tiffany Langer, Clint Rux and Justin Reinbold. Each council member serves a five-year term. County government is overseen by five commissioners. Each county commissioner serves a five-year term. The county commissioners include Duane Sutton, Dennis Feickert, Mike Wiese, Rachel Kippley, and Doug Fjeldheim. Aberdeen is home to Brown County offices including clerk-magistrate, county auditor, landfill office, register of deeds, county treasurer, coroner, emergency management, highway superintendent, public welfare, state's attorney, and a few others. The state senators from Brown County include Brock Greenfield and Al Novstrup, and the state representatives included Lana Greefield, Kaleb Wies, Carl Perry and Drew Dennert. They are all in office until December 2020 In 2008, Governor Mike Rounds named Aberdeen as the South Dakota Community of the Year. Education Public schools Aberdeen Public Schools are part of the Aberdeen School District. The school district has six elementary schools, two middle schools, and one high school. The elementary schools are C.C. Lee Elementary School, Lincoln Elementary School, May Overby Elementary School, O.M. Tiffany Elementary School, Simmons Elementary School and Mike Miller Elementary School. The two middle schools are Holgate Middle School, which serves the north side of Aberdeen, and Simmons Middle School, which serves the south side of the city. Students in the district attend Central High School. The Hub Area Technical School is located in the district. Aberdeen also has an alternative middle and high school. The Aberdeen School District's enrollment for the year 2011–2012 was approximately 3,945 students, and the average class size was in the low to mid-twenties. Due to a projected increase in enrollment and the modernization of facilities, Simmons Middle School was completely remodeled with the demolition of the original 1929 building and the addition of a new classroom and cafeteria building which was completed in August 2008. The public school in Aberdeen is AA under the SDHSAA. Parochial schools Aberdeen has several parochial schools, including the Catholic-affiliated Roncalli High School, the nondenominational Aberdeen Christian School, and Trinity Lutheran School of the WELS. Special programs The South Dakota School for the Blind and Visually Impaired is a state special school under the direction of the South Dakota Board of Regents. Higher education Northern State University Northern State University (NSU) is a public university that was founded in 1901 and today occupies a campus. 2,528 students, ranging from first-year to graduate students, attended NSU for the 2006–2007 school year. The student to teacher ratio is 19:1. NSU was originally called the Institute of South Dakota before changing its name to Northern Normal and Industrial School in 1901. It changed its name again in 1939 when it became the Northern State Teachers College, and again in 1964, becoming Northern State College before finalizing at Northern State University in 1989. NSU offers thirty-eight majors and forty-two minors as well as other degrees, and also has nine graduate degree areas for students wishing to further their education after achieving their first degree. The mascot of NSU is the wolf named Thunder. Presentation College Presentation College is a Catholic college on a campus, and was founded in 1951. Enrollment in fall 2014 was reported to be 735. PC offers 26 programs between the main Aberdeen campus and the other campuses located throughout the state. Most of the degrees offered are in the health-care field. The student to teacher ratio is 12:1. Presentation's mascot is the Saint, giving it the nickname the Presentation College Saints. Media The American News was founded as a weekly newspaper in 1885, by C.W. Starling and Paul Ware. It is now a daily newspaper. Television AM radio FM radio Infrastructure Transportation Air The Aberdeen Regional Airport is currently served by Delta Connection. It offers flights to Minneapolis-St. Paul International Airport using the Bombardier CRJ200 aircraft. Roads There are two major US highways that serve Aberdeen. One is US Highway 281, a north–south highway that runs continuously from the Canadian border to the Mexican border, the only three-digit U.S. highway to do so. This also makes it the longest three-digit U.S. highway. The second highway is US Highway 12 that runs east–west across northern South Dakota from the Minnesota border before curving northwest into the southwestern corner of North Dakota. The western terminus is in Aberdeen, Washington, and the eastern terminus is in downtown Detroit, Michigan. US Highway 12 is the major thoroughfare in Aberdeen, and is signed in the city of Aberdeen as 6th Avenue South. US Highway 281 was recently realigned onto a new bypass that was constructed around the western area of the city. Transit Taxi Aberdeen Taxi service provides general taxi service in Aberdeen. Aberdeen Shuttle provides shuttle service to and from the airport along with general taxi services. Bus Jefferson Lines is a bus service from Aberdeen that connects to Sioux Falls, South Dakota, Fargo, North Dakota, and Minneapolis, Minnesota. Car rental There are five car rental services in Aberdeen: Hertz, Avis, Dollar-Thrifty, Toyota Rent-a-Car and Nissan Rental Car. Hertz and Avis Car rental are located in the airport terminal. Dollar-Thrifty is located in Aberdeen Flying Service. Toyota Rent-a-Car and Nissan Rental Car are located at Harr Motors across from the airport. Train The BNSF Railway conveys freight and grain through Aberdeen. Until 1969 the Milwaukee Road ran trains between Aberdeen and Minneapolis. Earlier, until 1961, trains from Chicago to Seattle ran through the railroad's Aberdeen Station. Healthcare Aberdeen has two hospitals, Avera St. Luke's Hospital and Sanford Aberdeen Medical Center. There are several nursing homes in the area, including Avera Mother Joseph Manor, Manor Care, Bethesda Home of Aberdeen, Aberdeen Health and Rehab, Angelhaus and Gellhaus Carehaus. Notable people Don Meyer college basketball coach Michael Andrew, Olympic swimmer Bruce Baillie, experimental filmmaker, founding member of Canyon Cinema Sam Barry, Hall of Fame basketball, football and baseball coach L. Frank Baum, famous for his book The Wonderful Wizard of Oz Joshua Becker, minimalist writer Jerry Burke, organist for Lawrence Welk John Cacavas, Hollywood film score composer Emma Amelia Cranmer, temperance reformer, woman suffragist, writer Tom Daschle, former U.S. senator and Senate majority leader Drew Dennert, member of the South Dakota House of Representatives Justin Duchscherer, MLB pitcher for the Oakland Athletics Thomas Dunn, conductor who contributed to early music revival Makenzie Falcon, Miss South Dakota Teen USA 2016 and Top 15 semi-finalist at Miss Teen USA 2016 Terry Francona, Cleveland Indians manager Matilda Joslyn Gage, suffragist, Native American activist, abolitionist, freethinker and author Hamlin Garland, author of the Middle Border series. Matt Guthmiller, Once the youngest person to circumnavigate the globe by air Mary GrandPré, illustrator Joseph Hansen, mystery writer Charles N. Herreid, Governor of South Dakota Josh Heupel, University of Tennessee Volunteers head football coach, former University of Central Florida head football coach and quarterback for the 2000 national champion Oklahoma Sooners Ron Holgate, singer and actor Buel Hutchinson, lawyer and politician Saul Phillips college basketball coach Colton Iverson (born 1989), basketball player for Bàsquet Club Andorra David C. Jones, USAF general and former chairman of the Joint Chiefs of Staff Roland Loomis, key figure in the modern primitive movement Kenneth J. Meier, political scientist, Texas A&M University Paul Sather college basketball coach Julie Sommars, actress Eddie Spears, actor Michael Spears, actor Kaleb Weis, member of the South Dakota House of Representatives Notes References External links City website Community website Cities in South Dakota Cities in Brown County, South Dakota County seats in South Dakota Populated places established in 1880 1880 establishments in Dakota Territory

2710

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

Au

Au, AU, au or a.u. may refer to: Science and technology Computing .au, the internet country code for Australia Au file format, Sun Microsystems' audio format Audio Units, a system level plug-in architecture from Apple Computer Adobe Audition, a sound editor program Windows Update or Automatic Updates, in Microsoft Windows Windows 10 Anniversary Update, of August 2016a Physics and chemistry Gold (chemical symbol: Au), a chemical element Absorbance unit, a reporting unit in spectroscopy Atomic units, a system of units convenient for atomic physics and other fields Ångström unit, a unit of length equal to 10−10 m or 0.1 nanometre. Astronomical unit, a unit of length often used in Solar System astronomy, an approximation for the average distance between the Earth and the Sun Arbitrary unit, a relative placeholder unit for when the actual value of a measurement is unknown or unimportant ("a.u." is deprecated, use "arb. unit" instead) Arts and entertainment Music AU (band), an experimental pop group headed by Luke Wyland Au, a 2010 release by Scottish rock band Donaldson, Moir and Paterson Au a track on Some Time in New York City by an album by John Lennon & Yoko Ono and Elephant's Memory, Alternative Ulster, a Northern Irish music magazine, now called AU Literature Alternative universe (fan fiction), fiction by fan authors that deliberately alters facts of the canonical universe written about. Other media Au Co, a fairy in Vietnamese mythology Age of Ultron, a 2013 series published by Marvel Comics A.U, a Chinese media franchise and brand Organizations au (mobile phone company), a mobile phone operator in Japan African Union, a continental union Americans United for Separation of Church and State Athletic Union, the union of sports clubs in a British university Austral Líneas Aéreas (IATA code AU) Auxiliary Units, specially trained, highly secret units created by the United Kingdom government during the Second World War Universities Asia Ajou University in Suwon, Gyeonggi, South Korea Abasyn University in Peshawar, Khyber Pakhtunkhwa, Pakistan Andhra University in Visakhapatnam, AP, India Anhui University in Hefei, Anhui, China Aletheia University in New Taipei City, Taiwan Allahabad University in Allahabad, Uttar Pradesh, India Arellano University in Philippines Assumption University (Thailand) in Thailand Abhilashi University in Himachal Pradesh, India Adesh University in Bathinda, Punjab, India. Europe Aarhus University in Aarhus, Denmark Aberystwyth University in Aberystwyth, Wales, United Kingdom Akademia Umiejętności in Kraków, Poland Arden University in Coventry, England Oceania Auckland University in New Zealand North America Adelphi University in Garden City, New York Alfred University in Alfred, New York Algoma University in Sault Ste. Marie, Ontario, Canada American University in Washington, D.C. Anaheim University in Anaheim, California Anderson University (Indiana) in Anderson, Indiana Anderson University (South Carolina) in Anderson, South Carolina Andrews University in Berrien Springs, Michigan Antioch University in Culver City, California Apollos University in Huntington Beach, California Arcadia University in Glenside, Pennsylvania Argosy University in Alameda, California Ashland University in Ashland, Ohio Athabasca University in Athabasca, Alberta, Canada Auburn University in Auburn, Alabama Augsburg University in Minneapolis, Minnesota Aurora University in Aurora, Illinois Other Air University (disambiguation), various Air Force universities Places Aue (toponymy), a frequent element in Germanic toponymy Australia (ISO 3166 country code) Au, Guinea, Kankan Region Austria Austria (informal two-letter country code) Au, Vorarlberg, Bregenz, Austria Au am Leithaberge, Austria Au im Bregenzerwald, Austria Germany Au (Munich), Munich, Germany Au (Schwarzwald), Baden-Württemberg, Germany Au (squat), a building and cultural center in Frankfurt, Germany Au am Rhein, Germany Au in der Hallertau, Germany Switzerland Au, St. Gallen Au, Zürich Au peninsula Schloss Au, a château in Wädenswil Vehicles Ford Falcon (AU), a family car made in Australia Vought AU, a post-World War II US Marine Corps variant of the F4U Corsair aircraft Other uses Aú, a cartwheel in the Brazilian martial art of Capoeira Au (surname), a Chinese family name Au language Ab urbe condita (sometimes abbreviated as a.u.), Latin for "from the founding of the City" (Rome) a'u, the Hawaiian name for the Pacific blue marlin

2712

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

Aberdour

Aberdour (; Scots: , ) is a scenic and historic village on the south coast of Fife, Scotland. It is on the north shore of the Firth of Forth, looking south to the island of Inchcolm and its Abbey, and to Leith and Edinburgh beyond. According to the 2011 census, the village has a population of 1,633. The village's winding High Street lies a little inland from the coast. Narrow lanes run off it, providing access to the more hidden parts of the village and the shoreline itself. The village nestles between the bigger coastal towns of Burntisland to the east and Dalgety Bay to the west. The parish of Aberdour takes its name from this village, and had a population of 1,972 at the 2011 Census. Etymology Aberdour means 'mouth of the Dour'. The first element is the Pictish word aber 'river mouth'. The name of the Dour Burn, which enters the River Forth at the village's harbour, is from Pictish duvr 'water'. A cognate of this word is also seen in Dover and Andover. The Pictish word was subsequently changed to Gaelic dobhar. Aberdour is recorded in 1179 as Abirdoure and in 1126 as "Abirdaur". History For much of its history Aberdour was two villages, Wester Aberdour and Easter Aberdour, on either side of the Dour Burn; however this distinction was blurred by the 19th century arrival of the railway. In the 18th century Aberdour's harbour was improved by the addition of a stone pier to help handle the coal traffic from nearby collieries. However, in the 1850s the traffic changed dramatically, and Aberdour Harbour became a popular destination for pleasure steamers from Leith. This in turn led to the building of a deeper water pier a little around the bay at Hawkcraig, and to the development of hotels and many of the other services still on view today in the village. The railway came to Aberdour in 1890, with the building of the line east from the newly opened Forth Bridge. The station has won many "best kept station" awards. Landmarks Virtually between the two former settlements, though actually part of Easter Aberdour, lies Aberdour Castle. This started life as a modest hall house on a site overlooking the Dour Burn in the 13th century. The oldest part of the present semi-ruin constitutes one of the earliest surviving stone castles in mainland Scotland. Over the next four hundred years the Castle was successively developed according to contemporary architectural ideas. Notable are the parts, still largely roofed, built by the Earls of Morton, with refined Renaissance detail, in the second half of the 16th century. A fire in the late 17th century was followed by some repairs, but in 1725 the family purchased 17th century Aberdour House, on the west side of the burn and in Wester Aberdour, and the medieval Castle was allowed to fall into relative decay. Aberdour Castle is now in the care of Historic Environment Scotland and open to the public (entrance charge). After a period of dereliction Aberdour House was developed for residential use in the early 1990s. Neighbouring St Fillan's Church is one of the best-preserved medieval parish churches in Scotland, dating largely to the 12th century and originally under control of Inchcolm Abbey. A south arcade was added to the nave in the early 16th century (open in summer). The A921, the main road along the south coast of Fife, leads down the High Street of Wester Aberdour, before kinking sharply left to cross the railway line, then right again to progress through Easter Aberdour's Main Street. Wester Aberdour has a narrow through road more closely hemmed in by shops and hotels. A number of vernacular buildings of the 17th-early 19th centuries add to the historic scene. Close to the railway bridge, three lanes continue eastwards, presumably once the route of the original High Street before the arrival of the railway. One now leads to Aberdour railway station, a beautifully kept and cared for example of a traditional station, in keeping with its role of transporting at least a quarter of the village's working population to their work each day. A second lane leads alongside the railway line to Aberdour Castle, while a third leads to the restored Aberdour House. A little further west, a narrow road closely lined with high walls, Shore Road, leads down to the West Sands and the Harbour. For many this area is the highlight of any visit to Aberdour; parking at the foot of Shore Road is usually at a premium. Another road leads coastwards from Easter Aberdour. Hawkcraig Road leads past St Fillan's Church and through Silversand Park, home to Aberdour Shinty Club, en route to the much better parking area on Hawkcraig. This was formerly a sandstone quarry and then used as the council refuse tip before becoming a carpark, part of the overgrown and rocky bluff separating Aberdour's two bays. From here is it a short walk to the Silver Sands, Aberdour's busiest and most popular beach. On the west side of Hawkcraig Point there is a short concrete jetty that was used as part of the development of radio controlled torpedoes during World War One. The foundations of the Radio Hut can still be seen in the lea of the hill. The Aberdour obelisk was built by Lord Morton on his departure from the village to relocate to a large home in Edinburgh, it was built so he could see his former hometown from his new house when he looked through binoculars - it stands in a cowfield between the castle and the beach. The ruined 16th-century church of St Drostan stands beside Dour Burn. It is all that is left of the kirktown of Aberdour. Its bellcote was reused in New Aberdour Parish Church. Culture Aberdour hosts an annual festival, which runs from late July to early August and features musical events, shows, sporting events and children's events. Aberdour was a 2005 finalist in the prestigious "Beautiful Scotland in Bloom" awards. It was nominated for "Best Coastal Resort" in Scotland along with St Andrews in Fife, North Berwick in East Lothian, and Rothesay in Argyll and Bute. In 2014 Aberdour was voted Best Coastal Village in Fife and Best Small Coastal Village in Scotland. It also received a Gold Award in Beautiful Fife and Beautiful Scotland. In 2018 Aberdour was voted the second-best place to live in Scotland by The Sunday Times list of Best Places to Live Aberdour is home to Fife's only senior shinty club. Aberdour Shinty Club field teams in both the men's and women's senior national leagues. Aberdour's beaches Aberdour has two beaches - the Silver Sands, and the Black Sands. The Silver Sands are located on the East side of the village, and has previously held a "Blue flag" beach award, which denotes an exemplary standard of cleanliness, facilities, safety, environmental education and management. New facilities are currently under construction by Fife Council, which will much improve the beach throughout the year. The Black Sands (also known as the West Beach), as the contrasting name would suggest, have a rockier and darker sand, and are also popular with visitors exploring the rock caves and fascinating sea life. During the summer months (April–September), dogs are banned from the Silver Sands but they are allowed all year round at the West Beach. The two beaches are linked by part of the Fife Coastal Path which also takes you past the harbour and the Hawkcraig - a popular rock climbing location. Silver Sands is becoming more popular with open water swimmers, who swim daily in the sea, both as a leisure pursuit, and as training for open water competition. The bay provides safety from the currents, although only the adventurous swim round to the harbour. Several scenes of Richard Jobson's 2003 movie "16 Years of Alcohol" were filmed at the Black Sands in Aberdour. Inchcolm The island of Inchcolm, or Island (Gaelic innis) of Columba, a quarter of a mile from the shore, forms part of the parish of Aberdour. Its name implies associations dating back to the time of Columba and, although undocumented before the 12th century, it may have served the monks of the Columban family as an 'Iona of the east' from early times. During the First and Second World Wars, Inchcolm was occupied by the army as part of the defences of the Firth of Forth. There are extensive remains of gun emplacements, barracks, etc. from these periods. The island is notable for its wildlife, especially seabirds and seals. These draw many visitors in summer, along with the remains of the historic Abbey, and is a popular setting for weddings. Notable residents Notable past and present residents of the town include: Rev Robert Liston Moderator of the General Assembly of the Church of Scotland in 1787 Geoffrey Keyes, recipient of the Victoria Cross William Wotherspoon, rugby union player Twin cities/towns Corte Franca, Italy (since 31 July 2004) See also Aber and Inver as place-name elements Aberdour Shinty Club List of places in Fife References External links Aberdour Festival website Villages in Fife Parishes in Fife

2714

https://en.wikipedia.org/wiki/Aberfoyle%2C%20Stirling

Aberfoyle, Stirling

Aberfoyle () is a village in the historic county and registration county of Perthshire and the council area of Stirling, Scotland. The settlement lies northwest of Glasgow. The parish of Aberfoyle takes its name from this village, and had a population of 1,065 at the 2011 Census. Geography The town is situated on the River Forth at the foot of Craigmore ( high). Since 1885, when the Duke of Montrose constructed a road over the eastern shoulder of Craigmore to join the older road at the entrance of the Trossachs pass, Aberfoyle has become the alternative route to the Trossachs and Loch Katrine; this road, known as the Duke's Road or Duke's Pass, was opened to the public in 1931 when the Forestry Commission acquired the land. Loch Ard, about west of Aberfoyle, lies above the sea. It is long (including the narrows at the east end) and broad. Towards the west end is Eilean Gorm (the green isle), and near the north-western shore are the falls of Ledard. The loch's northern shores are dominated by the mountain ridge of Beinn an Fhogharaidh (). northwest of Loch Ard is Loch Chon, at above the sea, long and about broad. It drains by the Avon Dhu to Loch Ard, which is drained in turn by the Forth. Toponym Aberfoyle supposedly originates from the Brittonic Celtic, aber poll or aber phuill (Scottish Gaelic, ), meaning (place at the) mouth of the Phuill Burn (the Pow Burn enters the River Forth at Aberfoyle). Historically, alternative spellings such as Abirfull, Aberfule, Aberfoill and Aberfoil have been recorded before the current spelling became accepted by the 20th century. The river-name is from either Gaelic poll or Brittonic pol, both of which mean 'pool, sluggish water'. Industry The slate quarries on Craigmore which operated from the 1820s to the 1950s are now defunct; at its peak this was a major industry. Other industries included an ironworks, established in the 1720s, as well as wool spinning and a lint mill. From 1882 the village was served by Aberfoyle railway station, the terminus of the Strathendrick and Aberfoyle Railway which connected to Glasgow via Dumbarton or Kirkintilloch. The station closed to passenger traffic in 1951, and the remaining freight services ceased in 1959. The above industries have since died out, and Aberfoyle is supported mainly by the forestry, industry and tourism. Tourism Visitors were first attracted to Aberfoyle and the surrounding area after the publication of The Lady of the Lake by Sir Walter Scott in 1810. The poem described the beauty of Loch Katrine. Aberfoyle describes itself as The Gateway to the Trossachs, and is well situated for visitors to access attractions such as Loch Lomond and Inchmahome Priory at the Lake of Menteith. A tourist information office run by VisitScotland sits in the centre of town, offering free information, selling souvenirs and acting as a booking office for many of the local B&B's and hotels. Aberfoyle Golf Club was built in 1860 and is located just south of town near the Rob Roy restaurant. Aberfoyle is also part of the Loch Lomond and The Trossachs National Park. Aberfoyle is also home to the largest Go Ape adventure course in the UK, featuring the longest death slide, or 'zip-line', in the UK. Historical figures Aberfoyle has connections to many historical figures such as Rob Roy and Mary, Queen of Scots. Robert Roy MacGregor was born at the head of nearby Loch Katrine, and his well-known cattle stealing exploits took him all around the area surrounding Aberfoyle. It is recorded, for example, that in 1691, the MacGregors raided every barn in the village of Kippen and stole all the villagers' livestock. There currently stands a tree in the village that MacGregor was reputed to have climbed and hid in to escape the clutches of the law. Also, Mary, Queen of Scots, visited nearby Inchmahome Priory often as a child, and during her short reign. She also used the priory during her short reign, particularly in 1547, where she felt safe from the English Army. However, the most local historical figure is the Reverend Robert Kirk, born in 1644. It was the Rev. Kirk who provided the first translation into Scottish Gaelic of the Book of Psalms, however, he is better remembered for the publication of his book "The Secret Commonwealth of Elves, Fauns, and Fairies" in 1691. Kirk had long been researching fairies, and the book collected several personal accounts and stories of folk who claimed to have encountered them. It was after this, while Kirk was minister of Aberfoyle parish, that he died in unusual circumstances. Kirk had long believed that the local Doon Hill was the gateway to the "Secret Commonwealth", or the land of the Fairies. It was a place that Kirk visited often, taking daily walks there from his manse. The story goes that the Fairies of Doon Hill were angry with the Rev. Kirk for going into the domain of the Unseelie court, where he had been warned not to go, and decided to imprison him in Doon Hill — for one night in May 1692, the Rev. Kirk went out for a walk to the hill, in his nightshirt. Some accounts claim that he simply vanished, however he suddenly collapsed. He was found and brought home, but died soon afterwards. He was buried in his own kirkyard, although local legends claim that the fairies took his body away, and the coffin contains only stones. The huge pine tree that still stands at the top of Doon Hill is said to contain Kirk's imprisoned spirit. Kirk's cousin, Graham of Duchray, was then to claim that the spectre of Kirk had visited him in the night, and told him that he had been carried off by the Fairies. Having left his widow expecting a child, the spectre of Kirk told Graham that he would appear at the baptism, whereupon Graham was to throw an iron knife at the apparition, thus freeing Kirk from the Fairies' clutches. However, when Kirk's spectre appeared, Graham was apparently too shocked by the vision to throw the knife, and Kirk's ghost faded away forever. Today, visitors to Doon Hill write their wishes on pieces of white silk, or other white cloth, and tie them to the branches of the trees for the Fairies to grant. Unfortunately some people tie plastic confectionery wrappers instead, which slightly spoils the magic of the location and may harm the ecology of the forest. It is also said that if one runs around the great 'Minister's Pine' tree at the summit seven times, then the Fairies will appear. Some people have tried this and afterwards claim to have seen apparitions. Others merely get a bit dizzy and fall over. Use in fiction Aberfoyle was used as the location and inspiration for the adventure novel "Les Indes noires" (English title: The Child of the Cavern) by Jules Verne. The "Clachan of Aberfoil", then (in 1715) a small hamlet, plays a significant role in the second Volume of the novel Rob Roy by Walter Scott. Aberfoyle is where two grandfathers grew up in Shadow Land by Adam Wright. The grandfathers are the ancestors of two sub-characters who are related to Shellycoats. In the book, it is surmised that people from Aberfoyle have a hint of the faerie in their blood. See also List of places in Stirling (council area) References External links Read more about Aberfoyle and its history Villages in Stirling (council area) Trossachs Highland Boundary Fault

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

Abergavenny

Abergavenny (; , archaically Abergafenni meaning "mouth of the River Gavenny") is a market town and community in Monmouthshire, Wales. Abergavenny is promoted as a Gateway to Wales; it is approximately from the border with England and is located where the A40 trunk road and the A465 Heads of the Valleys road meet. Originally the site of a Roman fort, Gobannium, it became a medieval walled town within the Welsh Marches. The town contains the remains of a medieval stone castle built soon after the Norman conquest of Wales. Abergavenny is situated at the confluence of the River Usk and a tributary stream, the Gavenny. It is almost entirely surrounded by mountains and hills: the Blorenge (), the Sugar Loaf (), Ysgyryd Fawr (Great Skirrid), Ysgyryd Fach (Little Skirrid), Deri, Rholben and Mynydd Llanwenarth, known locally as "Llanwenarth Breast". Abergavenny provides access to the nearby Black Mountains and the Brecon Beacons National Park. The Marches Way and Beacons Way pass through Abergavenny whilst the Offa's Dyke Path passes through Pandy five miles to the north and the Usk Valley Walk passes through nearby Llanfoist. In the UK 2011 census, the six relevant wards (Lansdown, Grofield, Castle, Croesonen, Cantref and Priory) collectively listed Abergavenny's population as 12,515. The town hosted the 2016 National Eisteddfod of Wales. Etymology The town derives its name from a Brythonic word Gobannia meaning "river of the blacksmiths", and relates to the town's pre-Roman importance in iron smelting. The name is related to the modern Welsh word gof (blacksmith), and so is also associated with the Welsh smith Gofannon from folklore. The river later became, in Welsh, Gafenni, and the town's name became Abergafenni, meaning "mouth of (Welsh: Aber) the Gavenny (Gafenni)". In Welsh, the shortened form Y Fenni may have come into use after about the 15th century, and is now used as the Welsh name. Abergavenny, the English spelling, is in general use. Geography The town originally developed on the high ground to the north of the floodplain of the River Usk and to the west of the valley of the much smaller Gavenny River though has since extended to the east of the latter. It has merged with the originally separate settlement of Mardy to the north but remains separate from that of Llanfoist to the south due to the presence of the river and its floodplain; nevertheless Llanfoist is in many ways a suburb of the town. The ground rises gradually in the north of the town before steepening to form the Deri and Rholben spurs of Sugar Loaf. The A4143 crossing of the Usk by means of the historic Usk Bridge is sited at the narrowest point of the floodplain, a site also chosen for the former crossing of a tramroad and the later mainline railway. The high ground at either side is formed by a legacy of the last ice age, the recessional Llanfoist moraine which underlies both the village which gives it its name, the town centre and the Nevill Hall area. The older parts of the town north of its centre are built upon a relatively flat-lying alluvial fan extending west from the area of St Mary's Priory to Cantref and of similar age to the moraine. In the UK 2011 census, the six relevant wards (Lansdown, Grofield, Castle, Croesonen, Cantref and Priory) collectively listed Abergavenny's population as 12,515. History Roman period Gobannium was a Roman fort guarding the road along the valley of the River Usk, which linked the legionary fortress of Burrium (Usk) and later Isca Augusta or Isca Silurum (Caerleon) in the south with Y Gaer, Brecon and Mid Wales. It was also built to keep the peace among the local British Iron Age tribe, the Silures. Remains of the walls of this fort were discovered west of the castle when excavating the foundations for a new post office and telephone exchange building in the late 1960s. 11th century Abergavenny grew as a town in early Norman times under the protection of the Baron Bergavenny (or Abergavenny). The first Baron was Hamelin de Balun, from Ballon, a small town with a castle in Maine-Anjou near Le Mans. Today it is in the Sarthe département of France. He founded the Benedictine priory, now the Priory Church of St Mary, in the late 11th century. The Priory belonged originally to the Benedictine foundation of St. Vincent Abbaye at Le Mans. It was subsequently endowed by William de Braose, with a tithe of the profits of the castle and town. The church contains some unique alabaster effigies, church monuments and unique medieval wood carving, such as the Tree of Jesse. 12th and 13th centuries Owing to its geographical location, the town was frequently embroiled in the border warfare and power play of the 12th and 13th centuries in the Welsh Marches. In 1175, Abergavenny Castle was the site of a massacre of Seisyll ap Dyfnwal and his associates by William de Braose, 4th Lord of Bramber. Reference to a market at Abergavenny is found in a charter granted to the Prior by William de Braose. 15th to 17th centuries Owain Glyndŵr attacked Abergavenny in 1404. According to popular legend, his raiders gained access to the walled town with the aid of a local woman who sympathised with the rebellion, letting a small party in via the Market Street gate at midnight. They were able to open the gate and allow a much larger party who set fire to the town and plundered its churches and homes leaving Abergavenny Castle intact. Market Street has been referred to as "Traitors' Lane" thereafter. In 1404 Abergavenny was declared its own nation by Ieuan ab Owain Glyndŵr, illegitimate son of Owain Glyndŵr. The arrangement lasted approximately two weeks. At the Dissolution of the Monasteries in 1541, the priory's endowment went towards the foundation of a free grammar school, King Henry VIII Grammar School, the site itself passing to the Gunter family. During the Civil War, prior to the siege of Raglan Castle in 1645, King Charles I visited Abergavenny and presided in person over the trial of Sir Trefor Williams, 1st Baronet of Llangibby, a Royalist who changed sides, and other Parliamentarians. In 1639, Abergavenny received a charter of incorporation under the title of bailiff and burgesses. A charter with extended privileges was drafted in 1657, but appears never to have been enrolled or to have come into effect. Owing to the refusal of the chief officers of the corporation to take the oath of allegiance to William III in 1688, the charter was annulled, and the town subsequently declined in prosperity. Chapter 28 of the 1535 Act of Henry VIII, which provided that Monmouth, as county town, should return one burgess to Parliament, further stated that other ancient Monmouthshire boroughs were to contribute towards the payment of the member. In consequence of this clause Abergavenny on various occasions shared in the election, the last instance being in 1685. The right to hold two weekly markets and three yearly fairs, beginning in the 13th century, was held ever since as confirmed in 1657. Abergavenny was celebrated for the production of Welsh flannel, and also for the manufacture, whilst the fashion prevailed, of goats' hair periwigs. 19th to 21st centuries Abergavenny railway station, situated southeast of the town centre, opened on 2 January 1854 as part of the Newport, Abergavenny and Hereford Railway. The London North Western Railway sponsored the construction of the railway linking Newport station to Hereford station. The line was taken over by the West Midland Railway in 1860 before becoming part of the Great Western Railway in 1863. The station is on the Welsh Marches Line and is mostly served by Transport for Wales services. A railway line also ran up the valley towards Brynmawr and to Merthyr Tydfil. This line was closed following the Beeching cuts and the line to Clydach Gorge is now a cycle track and footpath. The Baker Street drill hall was completed in 1896. Adolf Hitler's deputy Rudolf Hess was kept under escort at Maindiff Court Hospital during the Second World War, after his flight to Britain. Baron of Abergavenny The title of Baron Abergavenny, in the Nevill family, dates from the 15th century with Edward Nevill, 3rd Baron Bergavenny, who was the youngest son of Ralph de Neville, 1st Earl of Westmorland by his second wife Joan Beaufort, daughter of John of Gaunt, first Duke of Lancaster. He married the heiress of Richard de Beauchamp, 1st Earl of Worcester, whose father had inherited the castle and estate of Abergavenny, and was summoned in 1392 to parliament as Lord Bergavenny. Edward Nevill was summoned to parliament with this title in 1450. His direct male descendants ended in 1587 in Henry Nevill, 6th Baron Bergavenny, but a cousin, Edward Nevill, 8th Baron Bergavenny, was confirmed in the barony in 1604. From him it has descended continuously, through fifteen individuals, the title being increased to an earldom in 1784; and in 1876 William Nevill 5th Earl, an indefatigable and powerful supporter of the Tory Party, was created 1st Marquess of Abergavenny. Coldbrook Park was a country house in an estate some southeast of the town. The house was originally built in the 14th century and belonged to the Herbert family for many generations until purchased by John Hanbury for his son, the diplomat Sir Charles Hanbury Williams. Sir Charles reconstructed the house in 1746 with the addition of a nine-bay two-storey Georgian façade with a Doric portico. It subsequently passed down in the Hanbury Williams family until it was demolished in 1954. Events Held during the first week of August every year, the National Eisteddfod is a celebration of the culture and language in Wales. The festival travels from place to place, alternating between north and south Wales, attracting around 150,000 visitors and over 250 tradestands and stalls. In 2016 it was held in Abergavenny for the first time since 1913. The Chair and Crown for 2016 were presented to the festival's Executive Committee at a ceremony held in Monmouth on 14 June 2016. The Abergavenny Food Festival is held in the second week of September each year. The Steam, Veteran and Vintage Rally takes place in May every year. The event expands year on year with the 2016 rally including a rock choir, shire horses, motorcycling stunts, vintage cars and steam engines. The Country and Western Music Festival is attended by enthusiasts of country music. It marked its third year in 2016 and was attended by acts including Ben Thompson, LA Country and many more. The event was last held in 2017. The Abergavenny Writing Festival began in April 2016 and is a celebration of writing and the written word. The Abergavenny Arts Festival, first held in 2018, celebrates arts in their broadest sense and showcases amateur and professional artists from the vibrant local arts scene together with some from further afield. Welsh language In recent decades the number of Welsh speakers in the town has increased dramatically. The 2001 census recorded 10% of the local population spoke the language, a five-fold increase over ten years from the figure of 2% recorded in 1991. The town has one of the two Welsh-medium primary schools in Monmouthshire, Ysgol Gymraeg y Fenni, which was founded in the early 1990s. It is also home to the Abergavenny Welsh society, Cymreigyddion y Fenni, and the local Abergavenny Eisteddfod. Sporting traditions Abergavenny was the home of Abergavenny Thursdays F.C., formed in 1927, and merged with Govilon, the local village side in 2013. The new club, Abergavenny Town FC, plays at the Pen-y-pound Stadium, maintained and run by Thursday’s football trust, as members of the Welsh League Division 1 for the 2019–20 season. Abergavenny Cricket Club play at Pen-y-Pound, Avenue Road, and Glamorgan CCC also play some of their games here. Abergavenny Cricket Club is one of the oldest in the country. It was founded in 1834, and celebrated the 175th anniversary of its foundation in 2009. Abergavenny Tennis Club also play at Pen-y-Pound and plays in the South Wales Doubles League and Aegon Team Tennis. The club engages the services of a head tennis professional to run a coaching programme for the town and was crowned Tennis Wales' Club of the Year in 2010. Abergavenny is also the home of Abergavenny RFC, a rugby union club founded in 1875 who play at Bailey Park. In the 2018–19 season they play in the Welsh Rugby Union Division Three East A league. Abergavenny Hockey Club, formed in 1897, currently play at the Abergavenny Leisure Centre on Old Hereford Road. Abergavenny hosted the British National Cycling Championships in 2007, 2009 and 2014, as part of the town's Festival of Cycling. Cattle market A cattle market was held in Abergavenny from 1863 to December 2013. During the period 1825–1863 a sheep market was held at a site in Castle Street, to stop the sale of sheep on the streets of the town. At the time of its closure the market was leased and operated by Abergavenny Market Auctioneers Ltd, who held regular livestock auctions on the site. Market days were held on Tuesdays for the auction sale of finished sheep, cull ewe/store and fodder (hay and straw), and some Fridays for the auction sale of cattle. Following the closure of Newport's cattle market in 2009 for redevelopment, Newport’s sales were held at Abergavenny every Wednesday. In 2011, doubts about the future of Abergavenny Cattle Market were raised following the granting of planning permission by Monmouthshire County Council for its demolition and replacement with a supermarket, car park, and library. In January 2012, the Welsh Government announced the repeal the Abergavenny Improvement Acts of 1854 to 1871 which obliged the holding of a livestock market within the boundaries of Abergavenny town; that repeal being effective from 26 March 2012. Monmouthshire County Council, which requested that the Abergavenny Improvement Acts be repealed, supported plans for a new cattle market to be established about from Abergavenny in countryside at Bryngwyn, some from Raglan. There was extensive local opposition to this site, which is situated on a notoriously dangerous B road. The new Monmouthshire Livestock Centre, a 27-acre site at Bryngwyn, opened in November 2013. The Market Hall Various markets are held in the Market Hall, for example: Tuesdays, Fridays and Saturdays – retail market; Wednesdays – flea market; fourth Thursday of each month – farmers' market; third Sunday of each month – antique fair; second Saturday of each month – craft fair. Cultural history Abergavenny hosted the National Eisteddfod of Wales in 1838, 1913 and most recently in 2016. In 1996 a film, Intimate Relations starring Julie Walters, Rupert Graves, Les Dennis and Amanda Holden was filmed at many locations in and around Abergavenny. The town's local radio stations are currently Sunshine Radio, at 107.8 FM, and NH Sound 1287 AM. Abergavenny is twinned with Östringen in Germany, Beaupréau in France and Sarno in Italy. Abergavenny is home to an award winning brass band. Formed in Abergavenny prior to 1884 the band became joint National Welsh League Champions in 2006 and SEWBBA and again joint National Welsh League Champions in 2011. The band also operate a Junior Band training local young musicians. During September the town holds the Abergavenny Food Festival. Abergavenny was named one of the best places to live in Wales in 2017. The Borough Theatre in the town centre hosts live events covering drama, opera, ballet, music, children's events, dance, comedy, storytelling, tribute bands and talks. The town held its first Abergavenny Arts Festival in 2018. The Melville Centre is close to the town centre and includes the Melville Theatre that hosts a range of live events. In popular culture Lord Abergavenny is a character in William Shakespeare's play Henry VIII. In 1968 "Abergavenny" was the title of a UK single by Marty Wilde. In 1969 it was also released in the US, under a Marty Wilde pseudonym "Shannon", where it was also a minor hit. Sherlock Holmes refers, in The Adventure of the Priory School, to a case he's working on in Abergavenny. In the book Harry Potter and the Prisoner of Azkaban, Abergavenny is mentioned by Stan Shunpike, the conductor of the Knight Bus when the bus takes a detour there to drop off a passenger. In the classic 70s period drama Upstairs, Downstairs, a major character in the second season, which is circa 1909–10, is Thomas Watkins, the devious Bellamy family chauffeur. Watkins came from Abergavenny. In the 1979 spinoff of Upstairs, Downstairs titled Thomas & Sarah, Watkins and Sarah Moffat, another major character, marry and return briefly to Abergavenny. In "Exit Wounds," the season two finale of Torchwood, when the weevils all retreat, Rhys asks PC Andy where they've all gone. Andy replies, "Abergavenny"? Buildings of note Abergavenny Castle is located strategically just south of the town centre overlooking the River Usk. It was built in about 1067 by the Norman baron Hamelin de Ballon to guard against incursions by the Welsh from the hills to the north and west. All that remains is defensive ditches and the ruins of the stone keep, towers, and part of the curtain wall. It is a Grade I listed building. The Church in Wales church of the Holy Trinity is in the Diocese of Monmouth. Holy Trinity Church was consecrated by the Bishop of Llandaff on 6 November 1840. It was originally built as a chapel to serve the adjacent almshouses and the nearby school. It has been Grade II listed since January 1974. Other listed buildings in the town include the parish Priory Church of St Mary, a medieval and Victorian building that was originally the church of the Benedictine priory founded in Abergavenny before 1100; the sixteenth century tithe barn near St Mary's; the Victorian Church of the Holy Trinity; the Grade II* listed St John's Masonic Lodge; the Museum; the Public Library; the Town Hall; and the remains of Abergavenny town walls behind Neville Street. From 1851, the Monmouthshire lunatic asylum, later Pen-y-Fal Hospital, a psychiatric hospital, stood on the outskirts of Abergavenny. Between 1851 and 1950, over 3,000 patients died at the hospital. A memorial plaque for the deceased has now been placed at the site. After closure in the 1990s, its buildings and grounds were redeveloped as a luxury housing development comprising houses as well as apartments. Some psychiatric services are now administered from Maindiff Court Hospital on the outskirts of the town, close to the foot of the Skirrid mountain. The hospital is housed in historic buildings, and is known for Rudolf Hess who was incarcerated here during WW2. Twinning Östringen, Germany Beaupréau, France Sarno, Italy Military One of the eleven Victoria Cross medals won at Rorke's Drift was awarded to John Fielding from Abergavenny. He had enlisted under the false name of Williams. One was also awarded for the same action to Robert Jones, born at Clytha between Abergavenny and Raglan. Another Abergavenny-born soldier, Thomas Monaghan received his VC for defending his colonel during the Indian Rebellion. In 1908 following the formation of the Territorial Force the Abergavenny Cadet Corps was formed and affiliated with the 3rd Battalion, The Monmouthshire Regiment. In 1912 the regiment was affiliated with the new formed 1st Cadet Battalion, The Monmouthshire Regiment. Notable people See also :Category:People from Abergavenny Augustine Baker (1575–1641), well-known Benedictine mystic and an ascetic writer. He was one of the earliest members of the English Benedictine Congregation which was newly restored to England after the Reformation. John Williams VC (1857-1932) soldier, recipient of the Victoria Cross for actions at Rorke’s Drift. Scott Ellaway (born 1981), conductor, was born and brought up locally. Becky James (born 1991), racing cyclist, double gold medallist at the 2013 UCI Track Cycling World Championships and double silver medallist at the 2016 Summer Olympics, was born and grew up in Abergavenny. Matthew Jay (1978–2003), singer-songwriter, spent much of his life in the town. Peter Law (1948–2006), politician and Independent MP, notable for defeating the Labour candidate in the safest Welsh seat during the 2005 general election was born in Abergavenny. Saint David Lewis (1616–1679), Catholic priest and martyr, was born in Abergavenny and prayed in the local Gunter Mansion. Malcolm Nash (1945–2019), cricketer, famous for bowling to Gary Sobers who hit six sixes in one Nash over, was born in Abergavenny. Mary Penry (1735–1804), Moravian sister in 18th-century Pennsylvania was born in Abergavenny. Owen Sheers (born 1974), poet, grew up in Abergavenny. Oliver Thornton (born 1979), West End actor, starred of Priscilla, Queen of the Desert, was born and grew up in Abergavenny. Vulcana (Miriam Kate Williams, 1874–1946), world-famous strongwoman, was born in Abergavenny. Ethel Lina White (1876–1944), crime writer best known for her novel The Wheel Spins (1936), on which the Alfred Hitchcock film The Lady Vanishes (1938) was based. Jules Williams (born 1968), writer, director, and producer of The Weigh Forward. Raymond Williams, (1921–1988) academic, critic and writer was born and brought up locally. Dave Richards, (1993) professional footballer for Crewe Alexandra was born and raised in the town. See also References Sources Jürgen Klötgen, Prieuré d'Abergavenny – Tribulations mancelles en Pays de Galles au temps du Pape Jean XXII (d'après des documents français et anglais du XIV° siècle collationnés avec une source d'histoire retrouvée aux Archives Secrètes du Vatican), in Revue Historique et Archéologique du Maine, Le Mans, 1989, p. 65–88 (1319 : cf John of Hastings, Lord of Abergavenny; Adam de Orleton, Bishop of Hereford, John of Monmouth, Bishop of Llandaff). External links Abergavenny Borough Band Abergavenny Museum BBC, South East Wales – Feature on Abergavenny Geograph British Isles – Photos of Abergavenny and surrounding areas Abergavenny Roman Fort Towns in Monmouthshire Towns of the Welsh Marches Market towns in Wales River Usk Black Mountains, Wales Communities in Monmouthshire

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

Abersychan

Abersychan is a town and community north of Pontypool in Torfaen, Wales, and lies within the boundaries of the historic county of Monmouthshire and the preserved county of Gwent. Abersychan lies in the narrow northern section of the Afon Lwyd valley. The town includes two schools; Abersychan Comprehensive School and Victoria Primary School; together with various shops and other amenities including Abersychan Rugby Club. Abersychan was the birthplace of the politicians Roy Jenkins, Don Touhig and Paul Murphy (MP for Torfaen); and of the rugby footballers Wilfred Hodder, Candy Evans and Bryn Meredith. History Like many of the 17th century isolated agricultural hamlets in the forested South Wales Valleys, Abersychan became a thriving industrial centre in the 19th and early 20th centuries, particularly for iron production. After the discovery of iron stone locally, the principal ironworks were built by the British Iron Company in 1825, served mainly by the LNWR's Brynmawr and Blaenavon Railway. The ironwork's main office building and quadrangle were designed by architect Decimus Burton, best known for his design of London Zoo. The works passed to the New British Iron Company in 1843 and to the Ebbw Vale Company in 1852, before closing in 1889. On 6 February 1890, an underground explosion at Llanerch Colliery killed 176. The site of the former ironworks today is a core site of , and a total land area of , includes a number of listed buildings: Abersychan Limestone Railway: built c 1830 to carry limestone from Cwm Lascarn quarry to the British Ironworks. Air Furnace at British Ironworks British Colliery Pumping Engine House: a Cornish beam pumping engine house built by the British Iron Company. Built of sandstone with a slate roof, and retains several fixtures Cwmbyrgwm Colliery: Site of former colliery including remains of a water-balance headgear, chimney, oval shafts, water power dams, tramroad routes, and waste tips. Various proposals have been made over the years to redevelop the site, currently under the ownership of HSBC, but none have so far passed the requirements of Torfaen county council. Local government Abersychan constitutes a community and electoral ward of the county borough of Torfaen. The area was part of the ancient parish of Trevethin, in Monmouthshire. On 3 June 1864 Abersychan was constituted a local government district, governed by a local board. In 1894 Abersychan became an urban district and civil parish. The urban district was abolished in 1935, with most of its area passing to Pontypool urban district, and a small area going to Abercarn UD. In 1974 the area became part of the borough of Torfaen, in the new local government county of Gwent. The community of Abersychan was formed in 1985, but no community council has yet been formed. Abersychan and Cwmavon is now a ward for the Pontypool Community Council. In 1996 Torfaen became a unitary authority. The Abersychan community includes Abersychan, Cwmavon, Garndiffaith, Pentwyn, Talywain, Varteg, and Victoria Village. Local Transport The nearest railway stations to Abersychan are Pontypool & New Inn (3 miles), Llanhilleth (3.5 miles) and Abergavenny (7 miles). Abersychan was served by the following (disused) stations: Abersychan and Talywain railway station Abersychan Low Level railway station Places nearby Pentwyn Pentwyn, Torfaen is a small village located in the district of Abersychan. It contains a post office, several houses and a small play park. The village has a cricket team (Pontnewynydd CC) and is located right next to the old railway line. The cricket club celebrated its 100-year anniversary in 2006 with a successful tour to Cork, Ireland. The village has superb views over the River Severn and Newport to the south. Victoria Village Victoria Village is a small hamlet located in the district of Abersychan. It comprises a small village school and a number of houses. A small group of houses on Incline Road mark the beginning of the village and the village boundary is near Cwmavon. Victoria Primary School is also in this area, housed in large grounds. Many homes are built around the school's boundaries. Victoria Village primary school was opened in 1903 and closed by the council in 2018. The last head of the school was Miss Joy Dando. And caretaker Miss Debbie Williams. References Towns in Torfaen Local Government Districts created by the Local Government Act 1858 Communities in Torfaen Electoral wards of Torfaen

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

Abertillery

Abertillery (; ) is a town and a community of the Ebbw Fach valley in the historic county of Monmouthshire, Wales. Following local government reorganisation it became part of the Blaenau Gwent County Borough administrative area. The surrounding landscape borders the Brecon Beacons National Park and the Blaenavon World heritage Site. Formerly a major coal mining centre the Abertillery area was transformed in the 1990s using EU and other funding to return to a greener environment. Situated on the A467 the town is north of the M4 and south of the A465 "Heads of the Valleys" trunk road. It is about by road from Cardiff and from Bristol. According to the 2011 Census, 4.8% of the ward's 4,416 (212 residents) resident-population can speak, read, and write Welsh. This is below the county's figure of 5.5% of 67,348 (3,705 residents) who can speak, read, and write Welsh. Etymology The name of the community means "the mouth of the River Tyleri", which flows into the town. The name is probably derived from a personal name. Town centre Abertillery's traditional-style town centre mainly developed in the late 19th century and as such has some interesting Victorian architecture. Spread over 4 main streets the town in its heyday had two department stores and a covered Victorian arcade linking two of the main shopping areas. These were all included in a Blaenau Gwent Borough Council remodelling and modernisation project using European Union funding in a £13 million programme spread over a 5-year period ending in 2015. The project included a new multi-storey car park, a revamp of public areas and the town's Metropole Theatre. This building provides production, exhibition, conference and meeting facilities as well as housing Abertillery museum. In March 2014 Prince Edward, the Earl of Wessex, officiated at the launch of Jubilee Square, a public facility in the town centre next to St Michael's Church. Coal mining Major industry came to the area in 1843 when the locality's first deep coal mine was sunk at Tir Nicholas Farm, Cwmtillery. The town developed rapidly thereafter and played a major part in the South Wales coalfield. Its population rose steeply, being 10,846 in the 1891 census and 21,945 ten years later. The population peaked just short of 40,000 around the beginning of the 1930s. Eventually there were six deep coal mines, numerous small coal levels, a tin works, brick works, iron foundry and light engineering businesses in the area. Just one of the coal mines, Cwmtillery, produced over 32 million tons of coal in its lifetime and at its height employed 2760 men and boys. In 1960 an underground explosion at Six Bells Colliery resulted in the loss of life of 45 local miners. Fifty years later the archbishop of Canterbury Rowan Williams officiated at the launch of the Guardian mining memorial. This artistically acclaimed monument standing at 20m tall overlooks Parc Arael Griffin, the now reclaimed and landscaped former colliery site. The adjoining Ty Ebbw Fach visitor centre provides conference facilities, a restaurant and a "mining valley" experience room. Not long after the disaster the renowned artist L. S. Lowry visited the area and recorded the scene. The resultant landscape painting now hangs in the Museum of Wales in Cardiff. The coal mines remained the predominant economic emphasis until the general run down of the industry in the 1980s. Abertillery Conurbation Away from the town centre, the often steep sided nature of the landscape, imposes its own demands on development. Whilst this sounds limiting it has helped provide the almost amphitheatre nature of Abertillery Park, often described as one of the most attractive rugby grounds in world rugby. The street plan and housing stock flow uninterrupted from Cwmtillery in the north to Six Bells in the south, forming the town that is Abertillery. Prior to 1974 local government was provided by Abertillery Urban District Council (AUDC). Its area included the small neighbouring villages of Aberbeeg, Llanhilleth and Brynithel. Historical data relating to Abertillery occasionally refers to this AUDC area meaning that it can be difficult to compare like with like. For example, the 2014 population for the wider conurbation area is around 20,000 rather than the 11,000 often quoted for Abertillery itself. Whilst in the main the area has an older housing stock there are several developments of modern, often large homes, generally found on the outskirts of the town with views out over the surrounding area. These apart, terraced council tax band A and B properties predominate, meaning that average house prices are among the most affordable in the UK. Local history Early history There are very few written historical records relating to the area before the town developed in the middle of the 19th century. Nevertheless, there are facts that you can use to outline important events. Abertillery museum has locally discovered artefacts dating as far back as the Bronze Age. St Illtyd's Church overlooking the town dates to the 13th century – probably with 6th century origins. St Illtyd's Motte lies just to the south west of the church. A Norman castle mound, it was probably destroyed in 1233. The ruins of two more recent, probably 14th century, castles lie on private land to the northeast of St Illtyd's Church. There are several ruined mediaeval farmhouses in the Abertillery area. The Local Blaenau Gwent Baptist church can trace its roots back to Tŷ Nest Llewellyn, a ruined 17th-century dwelling place often used by non-conformists to escape from the religious persecution of the times. Before the coming of major industry, Abertillery was little more than an area of scattered farms in the ancient parish of Aberystruth. In 1779 the parish minister Edmund Jones described the area thus: "The valley of Tyleri ... is the most delightful. The trees ... especially the beech trees, abounding about rivers great and small, the hedges and lanes make these places exceeding pleasant and the passing by them delightful and affecting ... in these warm valleys, with the prospect of the grand high mountains about them would make very delightful habitations." In 1799 clergyman and historian Archdeacon William Coxe toured the area and in writing a diary of his travels described it as "... richly wooded, and highly cultivated...we looked down with delight upon numerous valleys ... with romantic scenery". The entire population of Aberystruth parish at the turn of the 19th century was just a little over 800. It is not known what the population of Abertillery was at the time but it was probably in the very low hundreds, all of whom would have spoken Welsh only. From the mid-nineteenth century Industrialisation The area's first deep coal mine was sunk in 1843. Collieries in Abertillery Six Bells Colliery Abertillery Institute The first reading rooms were set up in Abertillery in 1856. However, when Thomas Powell took over the Tillery Colliery in 1882 he made a commitment to establish educational facilities for his workers. Local government Formed in 1877, Abertillery Urban District Council incorporated the adjoining smaller communities of Six Bells, Cwmtillery, Brynithel, Aberbeeg and Llanhilleth. The population of this conurbation climbed to almost 40,000 in 1931 making it the second largest town in Monmouthshire. The council was abolished in 1974 as part of major UK wide local government reorganisation. Transport The reopening of Abertillery railway station has been identified as a future development of the Ebbw Valley Railway. Education Abertillery Learning Community provides all-through education for the town and neighbouring areas. Until the 1970s the town had its own local authority-run Grammar school providing education up to the age of eighteen. Tertiary education is now provided by Coleg Gwent at Ebbw Vale – opened in 2013. Industry There are several small and medium-sized business parks in the area offering a range of business premises. In 2014 the largest employer was Tyleri Valley Foods. Many local people commute outside the area to work. Sport, leisure and tourism Abertillery Town cricket club and Abertillery Blaenau Gwent RFC formed in the 1880s. Both have their playing headquarters at "the Park" one of the most picturesque sporting complexes in the UK. The town supports two local Saturday football teams: Abertillery Bluebirds and Abertillery Excelsiors. There are numerous other sports activities running on an organized basis such as bowls, badminton, squash etc. The surrounding landscape provides hill walking opportunities and walker led groups are thriving in the area. One example is Ebbw Fach Trekkers walking group. The local museum has displays showing what life was like in the area in its heyday. It also has its own "valleys" Italian café complete with original furnishings. The Metropole theatre holds musical and drama events – from Blues to amateur dramatics and dance. The Guardian memorial is a destination for visitors to South Wales and amateur photographers in particular as evidenced by trip advisor. The visitor centre Tŷ Ebbw Fach stands nearby and provides cafe and visitor "mining valley" experience facilities. Notable people See :Category:People from Abertillery. Find local people of note in the fields of civil engineering, sport, science, medicine, religion and art. Harold Jones (murderer), the 15-year old killer committed 2 murders in 1921. Jack Shore (MMA fighter), competes in the UFC Thora Silverthorne, leading activist within the Communist Party of Great Britain, Labour Party MP for Reading, veteran of the Spanish Civil War, founder of the Association of Nurses, and former president of the Socialist Medical Association International relations Abertillery is twinned with: Royat, France See also Aber and Inver as place-name elements Abertillery and District Hospital References External links Abertillery Online BBC On This Day item about Six Bells Abertillery Bluebirds Football Club Photos of Abertillery and surrounding area on geograph.org.uk Towns in Blaenau Gwent

2719

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

Abettor

Abettor (from to abet, Old French abeter, à and beter, to bait, urge dogs upon any one; this word is probably of Scandinavian origin, meaning to cause to bite), is a legal term implying one who instigates, encourages or assists another to commit an offence. An abettor differs from an accessory in that he must be present at the commission of the crime; in addition they are equally guilty as they knowingly and voluntarily assist in the commission of that crime. All abettors (with certain exceptions) are principals, and, in the absence of specific statutory provision to the contrary, are punishable to the same extent as the actual perpetrator of the offence. A person may in certain cases be convicted as an abettor in the commission of an offence in which he or she could not be a principal, e.g. a woman or boy under fourteen years of age in aiding rape, or a solvent person in aiding and abetting a bankrupt to commit offences against the bankruptcy laws. More recently, an abettor is generally known as an accomplice. See also Aiding and abetting References Criminal law

2720

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

Abeyance

Abeyance (from the Old French abeance meaning "gaping") is a state of expectancy in respect of property, titles or office, when the right to them is not vested in any one person, but awaits the appearance or determination of the true owner. In law, the term abeyance can be applied only to such future estates as have not yet vested or possibly may not vest. For example, an estate is granted to A for life, with remainder to the heir of B. During B's lifetime, the remainder is in abeyance, for until the death of A it is uncertain who is B's heir. Similarly the freehold of a benefice, on the death of the incumbent, is said to be in abeyance until the next incumbent takes possession. The term hold in abeyance is used in lawsuits and court cases when a case is temporarily put on hold. English peerage law History The most common use of the term is in the case of English peerage dignities. Most such peerages pass to heirs-male, but the ancient baronies created by writ, as well as some very old earldoms, pass instead to heirs-general (by cognatic primogeniture). In this system, sons are preferred from eldest to youngest, the heirs of a son over the next son, and any son over daughters, but there is no preference among daughters: they or their heirs inherit equally. If the daughter is an only child or her sisters are deceased and have no living issue, she (or her heir) is vested with the title; otherwise, since a peerage cannot be shared nor divided, the dignity goes into abeyance between the sisters or their heirs, and is held by no one. If through lack of issue, marriage, or both, eventually only one person represents the claims of all the sisters, he or she can claim the dignity as a matter of right, and the abeyance is said to be terminated. On the other hand, the number of prospective heirs can grow quite large, since each share potentially can be divided between daughters, where the owner of a share dies without leaving a son. A co-heir may petition the Crown for a termination of the abeyance. The Crown may choose to grant the petition, but if there is any doubt whatsoever as to the pedigree of the petitioner, the claim is normally referred to the Committee for Privileges. If the claim is unopposed, the committee will generally award the claim, unless there is evidence of collusion, the peerage has been in abeyance for more than a century, or the petitioner holds less than one-third of the claim. This doctrine is a 17th-century innovation, although it is now applied retrospectively for centuries. It cannot be applied perfectly; for example, the eighth Baron De La Warr had three surviving sons; the first died without children, the second left two daughters, and the third left a son. In modern law, the title would have fallen into abeyance between the two daughters of the second son, and nobody else would have been able to claim it even if the abeyance were settled; however, in 1597, the grandson of the third son (whose father had been re-created Baron De La Warr in 1570) claimed the title and its precedence. In 1604, the Baron le Despencer case was the first peerage abeyance ever settled; the second was at the Restoration in 1660. Most subsequent abeyances (only a few dozen cases) were settled after a few years, in favour of the holder of the family properties; there were two periods in which long-abeyant peerages (in some cases peerages of doubtful reality) were brought back: between 1838 and 1841 and between 1909 and 1921. The Complete Peerage reports that only baronies have been called out of abeyance, although the Earldom of Cromartie was called out of a two-year abeyance in 1895. It is entirely possible for a peerage to remain in abeyance for centuries. For example, the Barony of Grey of Codnor was in abeyance for over 490 years between 1496 and 1989, and the Barony of Hastings was similarly in abeyance for over 299 years from 1542 to 1841. Some other baronies became abeyant in the 13th century, and the abeyance has yet to be terminated. The only modern examples of titles other than a barony that have yet gone into abeyance are the earldom of Arlington and the viscountcy of Thetford, which are united, and (as noted above) the earldom of Cromartie. It is no longer straightforward to claim English peerages after long abeyances. In 1927 a parliamentary Select Committee on Peerages in Abeyance recommended that no claim should be considered where the abeyance has lasted more than 100 years, nor where the claimant lays claim to less than one third of the dignity. The Barony of Grey of Codnor was treated as an exception to this principle, as a claim to it had been submitted prior to these recommendations being made to the Sovereign. Titles in the Peerage of Scotland cannot go into abeyance, because in Scottish law the eldest sister is preferred over younger sisters; sisters are not considered equal co-heirs. It is common, but incorrect, to speak of peerage dignities which are dormant (i.e. unclaimed) as being in abeyance. Peerages called out of abeyance by year of initial abeyance Settling litigation Abeyance can be used in cases where parties are interested in temporarily settling litigation while still holding the right to seek relief later if necessary. This may be considered a desirable outcome in cases where the party to the lawsuit is an organization with a transient membership and political perspective. The use of abeyance in such instances can allow such an organization to 'settle' with the party without officially binding its actions in the future, should a new group of decision makers within the organization choose to pursue taking the dispute to court. For example, abeyance was used as a settlement method in a Canadian lawsuit involving the University of Victoria Students' Society (UVSS), the BCCLA, and a campus pro-life club to whom the UVSS denied funding. The parties agreed to settle the lawsuit by holding the case in abeyance in return for the UVSS temporarily giving resources back to the club. With this arrangement, the pro-life club held on to its right to immediately reopen the case again should the UVSS deny resources to the club in the future, and the UVSS was able to avoid an expensive legal battle it did not have the will to pursue at the time. Thus the use of abeyance provided the security of a settlement for the pro-life campus club, while preserving the student society's voting membership's ability to take the matter back to court should they choose in the future to deny resources to the club. Other court cases may be held in abeyance when the issue may be resolved by another court or another event. This saves time and effort trying to resolve a dispute that may be made moot by the other events. During lawsuits related to the Patient Protection and Affordable Care Act after the Supreme Court of the United States granted certiorari in King v. Burwell, attorneys in Halbig v. Burwell requested abeyance of that case as the matter would be resolved in King and it would be a waste of time and effort to try to resolve it in the Halbig case. See also Coparcenary References Bibliography Cokayne, George Edward. The Complete Peerage. and . External links Grey of Codnor Peerage Case - House of Lords - 27 July 1989 Property law Peerages in the United Kingdom

2722

https://en.wikipedia.org/wiki/Anders%20Celsius

Anders Celsius

Anders Celsius (; 27 November 170125 April 1744) was a Swedish astronomer, physicist and mathematician. He was professor of astronomy at Uppsala University from 1730 to 1744, but traveled from 1732 to 1735 visiting notable observatories in Germany, Italy and France. He founded the Uppsala Astronomical Observatory in 1741, and in 1742 proposed (an inverted form of) the Centigrade temperature scale which was later renamed Celsius in his honour. Early life and education Anders Celsius was born in Uppsala, Sweden, on 27 November 1701. His family originated from Ovanåker in the province of Hälsingland. Their family estate was at Doma, also known as Höjen or Högen (locally as Högen 2). The name Celsius is a latinization of the estate's name (Latin celsus "mound"). As the son of an astronomy professor, Nils Celsius, nephew of botanist Olof Celsius and the grandson of the mathematician Magnus Celsius and the astronomer Anders Spole, Celsius chose a career in science. He was a talented mathematician from an early age. Anders Celsius studied at Uppsala University, where his father was a teacher, and in 1730 he, too, became a professor of astronomy there. Noted Swedish dramatic poet and actor Johan Celsius was also his uncle. Career In 1730, Celsius published the (New Method for Determining the Distance from the Earth to the Sun). His research also involved the study of auroral phenomena, which he conducted with his assistant Olof Hiorter, and he was the first to suggest a connection between the aurora borealis and changes in the magnetic field of the Earth. He observed the variations of a compass needle and found that larger deflections correlated with stronger auroral activity. At Nuremberg in 1733, he published a collection of 316 observations of the aurora borealis made by himself and others over the period 1716–1732. Celsius traveled frequently in the early 1730s, including to Germany, Italy and France, when he visited most of the major European observatories. In Paris he advocated the measurement of an arc of the meridian in Lapland. In 1736, he participated in the expedition organized for that purpose by the French Academy of Sciences, led by the French mathematician Pierre Louis Maupertuis (1698–1759) to measure a degree of latitude. The aim of the expedition was to measure the length of a degree along a meridian, close to the pole, and compare the result with a similar expedition to Peru, today in Ecuador, near the equator. The expeditions confirmed Isaac Newton's belief that the shape of the earth is an ellipsoid flattened at the poles. In 1738, he published the (Observations on Determining the Shape of the Earth). Celsius's participation in the Lapland expedition won him much respect in Sweden with the government and his peers, and played a key role in generating interest from the Swedish authorities in donating the resources required to construct a new modern observatory in Uppsala. He was successful in the request, and Celsius founded the Uppsala Astronomical Observatory in 1741. The observatory was equipped with instruments purchased during his long voyage abroad, comprising the most modern instrumental technology of the period. He made observations of eclipses and various astronomical objects and published catalogues of carefully determined magnitudes for some 300 stars using his own photometric system (mean error=0.4 mag). He proposed the Celsius temperature scale in a paper to the Royal Society of Sciences in Uppsala, the oldest Swedish scientific society, founded in 1710. His thermometer was calibrated with a value of 0 for the boiling point of water and 100 for the freezing point. In 1745, a year after Celsius's death, the scale was reversed by Carl Linnaeus to facilitate more practical measurement. Celsius conducted many geographical measurements for the Swedish General map, and was one of earliest to note that much of Scandinavia is slowly rising above sea level, a continuous process which has been occurring since the melting of the ice from the latest ice age. However, he wrongly posed the notion that the water was evaporating. In 1725 he became secretary of the Royal Society of Sciences in Uppsala, and served at this post until his death from tuberculosis in 1744. He supported the formation of the Royal Swedish Academy of Sciences in Stockholm in 1739 by Linnaeus and five others, and was elected a member at the first meeting of this academy. It was in fact Celsius who proposed the new academy's name. Works See also Celsius family References Citations Sources External links Biography of Anders Celsius 1701-1744 at Uppsala University's website Johan Celsius - Historical records and family trees at MyHeritage 1701 births 1744 deaths 18th-century Swedish astronomers 18th-century deaths from tuberculosis People from Uppsala Uppsala University alumni Uppsala University faculty Members of the Royal Swedish Academy of Sciences Tuberculosis deaths in Sweden 18th-century Swedish mathematicians Fellows of the Royal Society Creators of temperature scales Age of Liberty people

2723

https://en.wikipedia.org/wiki/Adam%20Carolla

Adam Carolla

Adam Carolla (born May 27, 1964) is an American radio personality, comedian, actor and podcaster. He hosts The Adam Carolla Show, a talk show distributed as a podcast which set the record as the "most downloaded podcast" as judged by Guinness World Records in 2011. Carolla co-hosted the syndicated radio call-in program Loveline with Drew Pinsky from 1995 to 2005 as well as the show's television incarnation on MTV from 1996 to 2000. He was the co-host and co-creator of the television program The Man Show (1999–2004), and the co-creator and a regular performer on the television show Crank Yankers (2002–2007, 2019–present). He hosted The Adam Carolla Project, a home improvement television program which aired on TLC in 2005 and The Car Show on Speed TV in 2011. Carolla has also appeared on the network reality television programs Dancing with the Stars and The Celebrity Apprentice. His book In Fifty Years We'll All Be Chicks debuted on The New York Times Best Seller list in 2010, and his second book, Not Taco Bell Material, also reached New York Times bestseller status. Carolla has made numerous guest appearances on political talk shows as a commentator. He hosted a weekly segment, "Rollin' with Carolla", on Bill O'Reilly's The O'Reilly Factor. Early life Adam Carolla was born on May 27, 1964, to Jim and Kris (née McCall) Carolla. Some sources list his birthplace as Los Angeles County, California, while others list it as Philadelphia, Pennsylvania. He grew up in the Los Angeles San Fernando Valley, and his parents separated when he was young. Carolla was not given a middle name by his parents; on his driver's license application he listed his middle name as "Lakers" as a joke. The application was processed without notice. His maternal step-grandfather was screenwriter László Görög. Adam was raised in the North Hollywood neighborhood of Los Angeles. He attended Colfax Elementary School, Walter Reed Junior High, and North Hollywood High School. Carolla did not receive his high school diploma until years later as it was held by the school until a library fine was paid. Carolla can be seen paying off the book and receiving his diploma in an episode of his 2005 television show, The Adam Carolla Project. During his youth, Carolla played Pop Warner football for seven years; he later suggested that being involved in sports saved him from a chaotic home life. During his senior year at North Hollywood High School, Carolla distinguished himself in football. In December 1981, he was named to the First Team Offensive Line, Central Valley League, one of 8 leagues at the time in the LA City Section of the California Interscholastic Federation. He began living on his own at the age of 18. He briefly attended Los Angeles Valley College, a community college, where he was placed on academic probation before dropping out to work in a series of jobs, including carpet cleaner, carpenter, boxing instructor, and traffic school instructor. Although broke, Carolla, his friends, and roommates owned a 1963 Cadillac limousine. In the early 1990s, Carolla studied improvisational comedy with The Groundlings and was a member of the ACME Comedy Theatre troupe. Radio In 1994, Carolla volunteered his services as a boxing trainer to prepare Jimmy Kimmel for a bout being staged by KROQ-FM's morning radio program Kevin and Bean. Kimmel was a regular on the show as "Jimmy the Sports Guy" and he was set to fight another KROQ personality in a boxing exhibition which was being billed as the "Bleeda in Reseda". Carolla parlayed this opportunity into a long-running friendship and business partnership with Kimmel as well as a recurring role on Kevin and Bean as cranky woodshop teacher, Mr. Birchum. Loveline In October 1995, after being signed to the William Morris Agency by Mark Itkin, Carolla was offered the job of co-hosting the evening radio call-in show Loveline. His co-hosts were the physician Drew Pinsky ("Dr. Drew") and metal DJ Riki Rachtman. Carolla received the offer after Pinsky heard him on Kevin and Bean (Rachtman left the show the following year.) Loveline was broadcast on KROQ-FM in Los Angeles and was syndicated nationwide on the former Westwood One radio network. While the format of the program was primarily that of a call-in show wherein listeners would ask questions about sex and relationships, Carolla would often spend much of the show ranting about various topics from fart jokes to extended parodies of radio morning shows, including mocking the format's penchant for useless and repetitive weather and traffic reports. In contrast to the reserved, thoughtful Pinsky, Carolla served as the loud, funny side of the show. Carolla's character was described by one reviewer as "a toned-down version of Howard Stern minus the huge ego". In a late-2003 Loveline episode, Carolla said that Hawaiians are "dumb", "in-bred", "retarded" people who are among the "dumbest people we have". The comments were met with anger in Hawaii and resulted in Lovelines cancellation on Hawaiian affiliate KPOI. The Adam Carolla Show In October 2005, Carolla was announced as the host of a new morning radio show on the Infinity Broadcasting network. His new show would replace the popular syndicated Howard Stern Show (which was moving to satellite radio) in twelve of the 27 markets in which Stern had been broadcast including Los Angeles, Las Vegas, San Francisco, San Diego, Phoenix, and Portland, Oregon. The Adam Carolla Show debuted in January 2006. In early 2008, actor Gerard Butler sat in and observed Adam Carolla on The Adam Carolla Show in order to prepare for his role in The Ugly Truth as a cynical and crass talk-radio host allegedly based on Carolla. On February 18, 2009, The Adam Carolla Show was canceled as part of a format switch at KLSX to AMP FM, a new top 40 station. The final show was Friday, February 20, 2009. Podcasts The Adam Carolla Podcast Carolla started a daily podcast on February 23, 2009, at his personal website, which would evolve into the ACE Broadcasting Network. The first Adam Carolla podcast was downloaded more than 250,000 times in the initial 24 hours, and by the third podcast, it was the number one podcast on iTunes in both the U.S. and Canada. During the debut week, the Adam Carolla podcast recorded 1.6 million downloads. In the second week it recorded 2.4 million downloads. By the fourth episode of the second week, featuring former Adam Carolla Show sidekick Dave Dameshek, the show was downloaded more than 500,000 times. Adam stated that bandwidth cost more than $9,000 a month as of May 2009. At the end of 2009, The Adam Carolla Podcast was selected by iTunes for its end-of-the-year awards as the Best Audio Podcast of 2009. On the April 4, 2010, episode of The Adam Carolla Show, Carolla referred to Filipino boxer Manny Pacquiao as a "fucking idiot" and said of the Philippines: "They got this and sex tours, that's all they have over there. Get your shit together, Philippines." A spokesman for President Gloria Macapagal Arroyo called Carolla an "ignorant fool". Carolla subsequently apologized via Twitter. On May 18, 2011, Carolla noted on Jimmy Kimmel Live! that The Adam Carolla Show had taken the Guinness World Record for the most downloaded podcast ever from previous holder Ricky Gervais by receiving 59,574,843 unique downloads from March 2009 to March 16, 2011. In 2010, Carolla posed for the NOH8 Campaign. In August 2011, Carolla released a podcast where he mocked a petition to the producers of Sesame Street that demanded Bert and Ernie get married on air. He said on air that gay activists should "[j]ust get married, and please shut up" and that "Y.U.C.K." would be more memorable acronym than LGBT, and referring to transgender people he asked: "When did we start giving a shit about these people?" GLAAD characterized the previous remarks by Carolla as offensive, including an assertion that "all things being equal", heterosexual parents make better parents than homosexual parents. Carolla responded: "I'm sorry my comments were hurtful. I'm a comedian, not a politician." "Patent Troll" Lawsuit In 2013, Personal Audio filed a patent infringement lawsuit against Lotzi Digital, Inc., producers of The Adam Carolla Show and several other podcasts on the Carolla Digital Network, in the U.S. District Court for the Eastern District of Texas. The suit alleged that owner Adam Carolla and his network of content infringed on Personal Audio's patent 8,112,504. Using the crowdfunding site FundAnything.com, listeners contributed more than $475,000 (as of August 2014) to support Carolla throughout the legal proceedings. Personal Audio dropped the lawsuit July 29, 2014, stating that the defendants were not "making significant money from infringing Personal Audio's patents". However, Carolla countersued, having already spent hundreds of thousands of dollars mounting a defense against claims he deemed unfounded. Among claims sought by the countersuit was a request that the initial patent be invalidated. On August 15, 2014, Carolla and Personal Audio filed a joint motion to dismiss after reaching a settlement, the details of which were not made public but included a six-week "quiet period" during which neither party could speak to the media. Both parties' claims were dropped without prejudice and, as such, could be refiled at a later date. Television 1996 through 2004 From 1996 to 2000, Carolla and Dr. Drew hosted Loveline on MTV, a television version of the radio show. Carolla began his first original television series with The Man Show, along with partner and friend Jimmy Kimmel, on Comedy Central from 1999 to 2003. He left The Man Show at the same time as Kimmel. Carolla has continued his work with Kimmel as a writer and guest on Jimmy Kimmel Live!. He also appeared on an episode of Space Ghost Coast to Coast around this time. Carolla and partner Daniel Kellison are the heads of Jackhole Productions. The two created the television show Crank Yankers for Comedy Central, which revived the Mr. Birchum character. The show premiered in 2002 on Comedy Central and returned to MTV2 on February 9, 2007, running again until March 30, 2007. The show screened in Australia on SBS Television and The Comedy Channel between 2003 and 2008. The show revived in 2019. 2005 through 2008 From August 2005 to November 2005, Carolla hosted the talk show Too Late with Adam Carolla on Comedy Central. Also in 2005, Carolla was featured in a home remodeling program called The Adam Carolla Project wherein he and a crew of old friends renovated his childhood home. The 13 episodes aired on the cable channel TLC (The Learning Channel) from October through December 2005. The house was then sold for 1.2 million dollars. In 2006, Carolla appeared on the special summer series Gameshow Marathon as a celebrity panelist on the Match Game episode. On the February 18, 2008 broadcast of his radio show, Carolla announced that he would be one of the contestants on the next season of Dancing with the Stars. Later in the broadcast, it was revealed to Carolla that his partner would be Julianne Hough. He was voted off on the April 8, 2008 episode after his performance of the Paso Doble, after incorporating a demonstration of unicycle riding in his dance routine. Dancing with the Stars performances On June 16, 2008, Carolla was selected to host a pilot of an American version of the popular BBC show Top Gear for NBC. In December 2008, NBC decided not to pick up the show. 2009 to present On February 21, 2009, a day after his Los Angeles-based morning radio show was canceled – as part of a format change at KLSX-FM – CBS ordered a comedy pilot, Ace in the Hole, starring Carolla as a husband and father who works as a driving instructor. Carolla created and wrote the pilot with Kevin Hench (Jimmy Kimmel Live!). Carolla stated that Pamela Adlon was to play his wife and Windell Middlebrooks would play his best friend. During his March 30, 2009 podcast, Carolla briefly described the show as being "All in the Family, essentially", with Carolla playing a similar role to that of Archie Bunker. On the July 23, 2009, episode of the Adam Carolla Podcast, Carolla announced that CBS was not picking up the pilot for the 2009 season, "in any way, shape or form". On October 22, 2009, it was reported in Variety that Carolla had struck a deal with NBC to produce a half-hour pilot for a sitcom. The report was later confirmed on January 4, 2010, and was the first comedy pilot ordered by NBC for the season. The untitled project, written by Carolla and Kevin Hench, was a single-camera sitcom that starred Carolla as a contractor and father who attempts to rebuild his life after his wife leaves him. Carolla was set to executive produce the NBC project along with frequent collaborators Kimmel and Hench, as well as his agent James "Babydoll" Dixon, Jon Pollack, Gail Berman, Daniel Kellison, and Lloyd Braun. Universal Media Studios, BermanBraun, and Carolla and Jimmy Kimmel's own Jackhole Industries. On the February 13, 2010 episode of Carolla's CarCast podcast, he revealed that The History Channel had picked up Top Gear US, which NBC had decided against in 2008. On the March 26, 2010, episode of CarCast, Carolla said that he would not be co-hosting Top Gear US because of scheduling conflicts with his NBC sitcom project. In June 2010, Carolla said that his NBC pilot had not been picked up and was now "dead". Premiering on February 19, 2012, Carolla was also one of the contestants in the 12th season of NBC's The Celebrity Apprentice. He was fired in Week 4, because host Donald Trump perceived that Carolla did not utilize teammate Mario Andretti's car background during a Buick presentation. The Car Show Carolla's The Car Show debuted on Speed TV July 13, 2011. Appearing Wednesdays at 10 pm Eastern, it featured Carolla as the host, along with Dan Neil, John Salley, and Matt Farah. It had a format similar to Top Gear, mixing car reviews, tests and humor. The show was initially met with positive reviews from car enthusiasts and comedy fans. Talk show host and comedian Jay Leno called The Car Show, "a lot of fun". The Car Show was cancelled after one season, after undergoing format changes due to low ratings, as Carolla mentioned on his podcast on January 13, 2012. Catch a Contractor Catch a Contractor is a non-scripted, original series on Spike, hosted by Carolla along with "no-nonsense contractor" Skip Bedell and his wife, investigator Alison Bedell. Together they expose unethical contractors and seek retribution for wronged homeowners. The show premiered on March 9, 2014, to 1.2 million viewers, the largest audience for a series debut on Spike since Coal in March 2011. The show was cancelled in 2015. Adam Carolla and Friends Build Stuff Live Premiering on Spike TV on March 14, 2017, Adam Carolla and Friends Build Stuff Live features Carolla building projects live and in studio with some of his Hollywood friends, and tackling viewers' home improvement projects via social media. Voice acting Carolla has also done voice acting on cartoons, including Commander Nebula on the Disney animated series Buzz Lightyear of Star Command, Death on Family Guy (replacing Norm Macdonald) and Spanky Ham on Drawn Together. He was also the voice of the éclair police officer, Wynchell, in the Disney film Wreck-It Ralph. In 2008 and 2009, he was the spokesperson for T.G.I. Friday's. Film In 2003, he appeared in Windy City Heat as himself. In 2006, Carolla finished work on The Hammer, a semi-autobiographical independent film he co-wrote and co-produced, in which he stars opposite Heather Juergensen. The film is based loosely on his own life and is filmed at a gym he helped build with his co-star, Ozzie, played by Oswaldo Castillo, his friend in real life whom he met while building the gym when they both worked in construction. The film made its world premiere at the 2007 Tribeca Film Festival in New York City and shortly thereafter received a positive review in Variety. The film was released on March 21, 2008. The film is rated 80% on Rotten Tomatoes. Adam made a short appearance in Jeff Balis' Still Waiting... (a sequel to Waiting...) playing a pick-up artist guru. Adam helped write an unproduced screenplay for a movie entitled Deaf Frat Guy: Showdown at Havasu. He is the voice of Virgil in the independent short film Save Virgil. In July 2013, Carolla used crowdfunding for Road Hard; a film he directed and starred in, about the lives of aging road comics. Adam confirmed through a press conference that the film would co-star David Alan Grier, Illeana Douglas, Diane Farr, and Larry Miller. It had limited theatrical release in the United States. Several minutes of the credits are devoted to listing the names of those who helped crowdfund the movie. Carolla also directed the documentary Winning: The Racing Life of Paul Newman on the 35-year car racing career of Paul Newman. The documentary showcases Newman's racing life as both a prolific driver and owner. In 2017, Carolla and Dennis Prager began filming No Safe Spaces, a documentary about political correctness at universities. No Safe Spaces had a limited opening on October 25, 2019, and did well enough to open nationwide on December 6, 2019. Filmography Books Carolla and Drew Pinsky co-wrote (with Marshall Fine) the self-help book The Dr. Drew and Adam Book: A Survival Guide to Life and Love, published in 1998. The book is a compilation of some of the advice the pair compiled while producing Loveline. In November 2010, Carolla's In Fifty Years We'll All Be Chicks... And Other Complaints from an Angry Middle-Aged White Guy was published by Crown Archetype and debuted at number eight on the New York Times Best Seller list for hardcover non-fiction on November 21, 2010. The book was compiled from rants Carolla had delivered on his radio show and podcast along with some new material and was dictated to and ghost-written by Mike Lynch. Carolla published a short, illustrated e-book entitled Rich Man, Poor Man in January 2012. The book details some similarities in the experiences of the very rich and the very poor which are not shared by the middle class. The book was illustrated by Michael Narren. Carolla's book Not Taco Bell Material was published by Crown Archetype on June 12, 2012. In President Me: The America That's in My Head, Carolla presents the comedian's fantasy of the United States with him at the helm. When asked in separate interviews, both before and after the book's release, about whether the "if-I-were-king" critique of America was a serious piece, he said it's both: "Well, there's a lot of jokes in it, but you know, it's like... Well, if you have a fat friend you may make a lot of fat jokes about your fat friend, but he's still fat". In Daddy, Stop Talking!: And Other Things My Kids Want But Won't Be Getting, Carolla writes about modern parenting. Carolla describes what he believes adults must do if they don't want to have to support their kids forever. Carolla uses his own childhood as a cautionary tale, and decries helicopter parenting. Corolla's latest book, I'm Your Emotional Support Animal: Navigating Our All Woke, No Joke Culture, was published by Post Hill Press on June 16, 2020 Views Political Regarding his political views, Carolla has stated, "I guess I would be Republican, in the sense that I want a secure border, I'm not into the welfare state, I'm not into all those freebie lunch programs. It just kind of demeans people." He goes on to state, however, that he is also in favor of typically liberal causes such as the legalization of marijuana (he is a member of the advisory board of the Marijuana Policy Project) and support for as well some progressive causes such as "[being] against semi-automatic and automatic weapons. I'm not an NRA guy by any stretch of the imagination. I'd like alternative energy to be explored and electric cars to be used, but I want them to be powered by nuclear power plants." Elsewhere, he has stated, "My feeling is this whole country is founded on the principle of 'If you are not hurting anyone, and you're not fucking with someone else's shit, and you are paying your taxes, you should be able to just do what you want to do.' It's the freedom and the independence." In an interview with Reason TV, Carolla described his views as libertarian. Cancel culture Carolla said, "If you meet anyone over 45, they'll tell you they got paddled, they got swatted, the teacher would smack them with a ruler. … Paddling a kid sounds pretty outrageous in 2020 and nobody would stand for it. ... But the people who engaged in it at the time when it was common practice or had a context, we don't need to build a time machine so we can cancel-culture them". In an interview with Tucker Carlson, Carolla said that cancel culture is "destroying free speech and killing comedy." Personal life On September 28, 2002, Carolla married Lynette Paradise. The couple's twins Natalia and Santino "Sonny" Richard Carolla were born June 7, 2006. Carolla announced in May 2021 that he and Lynette were divorcing after 19 years. Carolla was a part owner of Amalfi, an Italian restaurant in Los Angeles, saying, "I own about two percent of it, but I’ve never seen a penny." Carolla won the 2013 Pro/Celebrity Race as a professional and the 2012 Pro/Celebrity Race at the Toyota Grand Prix of Long Beach as an amateur. The 2012 race was run on April 14, 2012, and was broadcast on Speed TV. Carolla has previously participated in the race in 2010 and 2003. He finished ninth among 19 racers (fifth among the ten celebrities) in 2010 despite being regarded as a pre-race favorite. He is also a serious automobile collector with over 20 cars. His collection includes several Lamborghinis from the 1960s and early 1970s, including two Miuras (of 764 examples ever produced), one of which he has loaned to the Petersen Automotive Museum in Los Angeles, two 400GT 2+2s (of 247 units produced) and a 1965 350GT (one of 135 built). At least one Ferrari and Aston Martin and several vintage race cars round out the collection. Honors Carolla and Pinsky received a Sexual Health in Entertainment (SHINE) Award from The Media Project in 2000 for "incorporating accurate and honest portrayals of sexuality" in the talk show category for Loveline. Asteroid (4535) Adamcarolla is named in his honor. References External links Adam Carolla gives his best life advice 1964 births Living people 20th-century American comedians 21st-century American comedians 20th-century American male actors 21st-century American male actors American atheists American football offensive linemen American libertarians American male comedians American male film actors American male television actors American male voice actors American men podcasters American podcasters American satirists American talk radio hosts American television talk show hosts California Republicans Comedians from California Los Angeles Valley College people Los Angeles Valley Monarchs football players Participants in American reality television series People from North Hollywood, Los Angeles Racing drivers from California Trans-Am Series drivers The Apprentice (franchise) contestants North Hollywood High School alumni

2724

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

Autocorrelation

Autocorrelation, sometimes known as serial correlation in the discrete time case, is the correlation of a signal with a delayed copy of itself as a function of delay. Informally, it is the similarity between observations as a function of the time lag between them. The analysis of autocorrelation is a mathematical tool for finding repeating patterns, such as the presence of a periodic signal obscured by noise, or identifying the missing fundamental frequency in a signal implied by its harmonic frequencies. It is often used in signal processing for analyzing functions or series of values, such as time domain signals. Different fields of study define autocorrelation differently, and not all of these definitions are equivalent. In some fields, the term is used interchangeably with autocovariance. Unit root processes, trend-stationary processes, autoregressive processes, and moving average processes are specific forms of processes with autocorrelation. Auto-correlation of stochastic processes In statistics, the autocorrelation of a real or complex random process is the Pearson correlation between values of the process at different times, as a function of the two times or of the time lag. Let be a random process, and be any point in time ( may be an integer for a discrete-time process or a real number for a continuous-time process). Then is the value (or realization) produced by a given run of the process at time . Suppose that the process has mean and variance at time , for each . Then the definition of the auto-correlation function between times and is where is the expected value operator and the bar represents complex conjugation. Note that the expectation may not be well defined. Subtracting the mean before multiplication yields the auto-covariance function between times and : Note that this expression is not well defined for all time series or processes, because the mean may not exist, or the variance may be zero (for a constant process) or infinite (for processes with distribution lacking well-behaved moments, such as certain types of power law). Definition for wide-sense stationary stochastic process If is a wide-sense stationary process then the mean and the variance are time-independent, and further the autocovariance function depends only on the lag between and : the autocovariance depends only on the time-distance between the pair of values but not on their position in time. This further implies that the autocovariance and auto-correlation can be expressed as a function of the time-lag, and that this would be an even function of the lag . This gives the more familiar forms for the auto-correlation function and the auto-covariance function: Normalization It is common practice in some disciplines (e.g. statistics and time series analysis) to normalize the autocovariance function to get a time-dependent Pearson correlation coefficient. However, in other disciplines (e.g. engineering) the normalization is usually dropped and the terms "autocorrelation" and "autocovariance" are used interchangeably. The definition of the auto-correlation coefficient of a stochastic process is If the function is well defined, its value must lie in the range , with 1 indicating perfect correlation and −1 indicating perfect anti-correlation. For a weak-sense stationarity, wide-sense stationarity (WSS) process, the definition is where The normalization is important both because the interpretation of the autocorrelation as a correlation provides a scale-free measure of the strength of statistical dependence, and because the normalization has an effect on the statistical properties of the estimated autocorrelations. Properties Symmetry property The fact that the auto-correlation function is an even function can be stated as respectively for a WSS process: Maximum at zero For a WSS process: Notice that is always real. Cauchy–Schwarz inequality The Cauchy–Schwarz inequality, inequality for stochastic processes: Autocorrelation of white noise The autocorrelation of a continuous-time white noise signal will have a strong peak (represented by a Dirac delta function) at and will be exactly for all other . Wiener–Khinchin theorem The Wiener–Khinchin theorem relates the autocorrelation function to the power spectral density via the Fourier transform: For real-valued functions, the symmetric autocorrelation function has a real symmetric transform, so the Wiener–Khinchin theorem can be re-expressed in terms of real cosines only: Auto-correlation of random vectors The (potentially time-dependent) auto-correlation matrix (also called second moment) of a (potentially time-dependent) random vector is an matrix containing as elements the autocorrelations of all pairs of elements of the random vector . The autocorrelation matrix is used in various digital signal processing algorithms. For a random vector containing random elements whose expected value and variance exist, the auto-correlation matrix is defined by where denotes transposition and has dimensions . Written component-wise: If is a complex random vector, the autocorrelation matrix is instead defined by Here denotes Hermitian transposition. For example, if is a random vector, then is a matrix whose -th entry is . Properties of the autocorrelation matrix The autocorrelation matrix is a Hermitian matrix for complex random vectors and a symmetric matrix for real random vectors. The autocorrelation matrix is a positive semidefinite matrix, i.e. for a real random vector, and respectively in case of a complex random vector. All eigenvalues of the autocorrelation matrix are real and non-negative. The auto-covariance matrix is related to the autocorrelation matrix as follows:Respectively for complex random vectors: Auto-correlation of deterministic signals In signal processing, the above definition is often used without the normalization, that is, without subtracting the mean and dividing by the variance. When the autocorrelation function is normalized by mean and variance, it is sometimes referred to as the autocorrelation coefficient or autocovariance function. Auto-correlation of continuous-time signal Given a signal , the continuous autocorrelation is most often defined as the continuous cross-correlation integral of with itself, at lag . where represents the complex conjugate of . Note that the parameter in the integral is a dummy variable and is only necessary to calculate the integral. It has no specific meaning. Auto-correlation of discrete-time signal The discrete autocorrelation at lag for a discrete-time signal is The above definitions work for signals that are square integrable, or square summable, that is, of finite energy. Signals that "last forever" are treated instead as random processes, in which case different definitions are needed, based on expected values. For wide-sense-stationary random processes, the autocorrelations are defined as For processes that are not stationary, these will also be functions of , or . For processes that are also ergodic, the expectation can be replaced by the limit of a time average. The autocorrelation of an ergodic process is sometimes defined as or equated to These definitions have the advantage that they give sensible well-defined single-parameter results for periodic functions, even when those functions are not the output of stationary ergodic processes. Alternatively, signals that last forever can be treated by a short-time autocorrelation function analysis, using finite time integrals. (See short-time Fourier transform for a related process.) Definition for periodic signals If is a continuous periodic function of period , the integration from to is replaced by integration over any interval of length : which is equivalent to Properties In the following, we will describe properties of one-dimensional autocorrelations only, since most properties are easily transferred from the one-dimensional case to the multi-dimensional cases. These properties hold for wide-sense stationary processes. A fundamental property of the autocorrelation is symmetry, , which is easy to prove from the definition. In the continuous case, the autocorrelation is an even function when is a real function, and the autocorrelation is a Hermitian function when is a complex function. The continuous autocorrelation function reaches its peak at the origin, where it takes a real value, i.e. for any delay , . This is a consequence of the rearrangement inequality. The same result holds in the discrete case. The autocorrelation of a periodic function is, itself, periodic with the same period. The autocorrelation of the sum of two completely uncorrelated functions (the cross-correlation is zero for all ) is the sum of the autocorrelations of each function separately. Since autocorrelation is a specific type of cross-correlation, it maintains all the properties of cross-correlation. By using the symbol to represent convolution and is a function which manipulates the function and is defined as , the definition for may be written as: Multi-dimensional autocorrelation Multi-dimensional autocorrelation is defined similarly. For example, in three dimensions the autocorrelation of a square-summable discrete signal would be When mean values are subtracted from signals before computing an autocorrelation function, the resulting function is usually called an auto-covariance function. Efficient computation For data expressed as a discrete sequence, it is frequently necessary to compute the autocorrelation with high computational efficiency. A brute force method based on the signal processing definition can be used when the signal size is small. For example, to calculate the autocorrelation of the real signal sequence (i.e. , and for all other values of ) by hand, we first recognize that the definition just given is the same as the "usual" multiplication, but with right shifts, where each vertical addition gives the autocorrelation for particular lag values: Thus the required autocorrelation sequence is , where and the autocorrelation for other lag values being zero. In this calculation we do not perform the carry-over operation during addition as is usual in normal multiplication. Note that we can halve the number of operations required by exploiting the inherent symmetry of the autocorrelation. If the signal happens to be periodic, i.e. then we get a circular autocorrelation (similar to circular convolution) where the left and right tails of the previous autocorrelation sequence will overlap and give which has the same period as the signal sequence The procedure can be regarded as an application of the convolution property of Z-transform of a discrete signal. While the brute force algorithm is order , several efficient algorithms exist which can compute the autocorrelation in order . For example, the Wiener–Khinchin theorem allows computing the autocorrelation from the raw data with two fast Fourier transforms (FFT): where IFFT denotes the inverse fast Fourier transform. The asterisk denotes complex conjugate. Alternatively, a multiple correlation can be performed by using brute force calculation for low values, and then progressively binning the data with a logarithmic density to compute higher values, resulting in the same efficiency, but with lower memory requirements. Estimation For a discrete process with known mean and variance for which we observe observations , an estimate of the autocorrelation coefficient may be obtained as for any positive integer . When the true mean and variance are known, this estimate is unbiased. If the true mean and variance of the process are not known there are several possibilities: If and are replaced by the standard formulae for sample mean and sample variance, then this is a biased estimate. A periodogram-based estimate replaces in the above formula with . This estimate is always biased; however, it usually has a smaller mean squared error. Other possibilities derive from treating the two portions of data and separately and calculating separate sample means and/or sample variances for use in defining the estimate. The advantage of estimates of the last type is that the set of estimated autocorrelations, as a function of , then form a function which is a valid autocorrelation in the sense that it is possible to define a theoretical process having exactly that autocorrelation. Other estimates can suffer from the problem that, if they are used to calculate the variance of a linear combination of the 's, the variance calculated may turn out to be negative. Regression analysis In regression analysis using time series data, autocorrelation in a variable of interest is typically modeled either with an autoregressive model (AR), a moving average model (MA), their combination as an autoregressive-moving-average model (ARMA), or an extension of the latter called an autoregressive integrated moving average model (ARIMA). With multiple interrelated data series, vector autoregression (VAR) or its extensions are used. In ordinary least squares (OLS), the adequacy of a model specification can be checked in part by establishing whether there is autocorrelation of the regression residuals. Problematic autocorrelation of the errors, which themselves are unobserved, can generally be detected because it produces autocorrelation in the observable residuals. (Errors are also known as "error terms" in econometrics.) Autocorrelation of the errors violates the ordinary least squares assumption that the error terms are uncorrelated, meaning that the Gauss Markov theorem does not apply, and that OLS estimators are no longer the Best Linear Unbiased Estimators (BLUE). While it does not bias the OLS coefficient estimates, the standard errors tend to be underestimated (and the t-scores overestimated) when the autocorrelations of the errors at low lags are positive. The traditional test for the presence of first-order autocorrelation is the Durbin–Watson statistic or, if the explanatory variables include a lagged dependent variable, Durbin's h statistic. The Durbin-Watson can be linearly mapped however to the Pearson correlation between values and their lags. A more flexible test, covering autocorrelation of higher orders and applicable whether or not the regressors include lags of the dependent variable, is the Breusch–Godfrey test. This involves an auxiliary regression, wherein the residuals obtained from estimating the model of interest are regressed on (a) the original regressors and (b) k lags of the residuals, where 'k' is the order of the test. The simplest version of the test statistic from this auxiliary regression is TR2, where T is the sample size and R2 is the coefficient of determination. Under the null hypothesis of no autocorrelation, this statistic is asymptotically distributed as with k degrees of freedom. Responses to nonzero autocorrelation include generalized least squares and the Newey–West HAC estimator (Heteroskedasticity and Autocorrelation Consistent). In the estimation of a moving average model (MA), the autocorrelation function is used to determine the appropriate number of lagged error terms to be included. This is based on the fact that for an MA process of order q, we have , for , and , for . Applications Autocorrelation analysis is used heavily in fluorescence correlation spectroscopy to provide quantitative insight into molecular-level diffusion and chemical reactions. Another application of autocorrelation is the measurement of optical spectra and the measurement of very-short-duration light pulses produced by lasers, both using optical autocorrelators. Autocorrelation is used to analyze dynamic light scattering data, which notably enables determination of the particle size distributions of nanometer-sized particles or micelles suspended in a fluid. A laser shining into the mixture produces a speckle pattern that results from the motion of the particles. Autocorrelation of the signal can be analyzed in terms of the diffusion of the particles. From this, knowing the viscosity of the fluid, the sizes of the particles can be calculated. Utilized in the GPS system to correct for the propagation delay, or time shift, between the point of time at the transmission of the carrier signal at the satellites, and the point of time at the receiver on the ground. This is done by the receiver generating a replica signal of the 1,023-bit C/A (Coarse/Acquisition) code, and generating lines of code chips [-1,1] in packets of ten at a time, or 10,230 chips (1,023 × 10), shifting slightly as it goes along in order to accommodate for the doppler shift in the incoming satellite signal, until the receiver replica signal and the satellite signal codes match up. The small-angle X-ray scattering intensity of a nanostructured system is the Fourier transform of the spatial autocorrelation function of the electron density. In surface science and scanning probe microscopy, autocorrelation is used to establish a link between surface morphology and functional characteristics. In optics, normalized autocorrelations and cross-correlations give the degree of coherence of an electromagnetic field. In signal processing, autocorrelation can give information about repeating events like musical beats (for example, to determine tempo) or pulsar frequencies, though it cannot tell the position in time of the beat. It can also be used to estimate the pitch of a musical tone. In music recording, autocorrelation is used as a pitch detection algorithm prior to vocal processing, as a distortion effect or to eliminate undesired mistakes and inaccuracies. Autocorrelation in space rather than time, via the Patterson function, is used by X-ray diffractionists to help recover the "Fourier phase information" on atom positions not available through diffraction alone. In statistics, spatial autocorrelation between sample locations also helps one estimate mean value uncertainties when sampling a heterogeneous population. The SEQUEST algorithm for analyzing mass spectra makes use of autocorrelation in conjunction with cross-correlation to score the similarity of an observed spectrum to an idealized spectrum representing a peptide. In astrophysics, autocorrelation is used to study and characterize the spatial distribution of galaxies in the universe and in multi-wavelength observations of low mass X-ray binaries. In panel data, spatial autocorrelation refers to correlation of a variable with itself through space. In analysis of Markov chain Monte Carlo data, autocorrelation must be taken into account for correct error determination. In geosciences (specifically in geophysics) it can be used to compute an autocorrelation seismic attribute, out of a 3D seismic survey of the underground. In medical ultrasound imaging, autocorrelation is used to visualize blood flow. In intertemporal portfolio choice, the presence or absence of autocorrelation in an asset's rate of return can affect the optimal portion of the portfolio to hold in that asset. Serial dependence Serial dependence is closely linked to the notion of autocorrelation, but represents a distinct concept (see Correlation and dependence). In particular, it is possible to have serial dependence but no (linear) correlation. In some fields however, the two terms are used as synonyms. A time series of a random variable has serial dependence if the value at some time in the series is statistically dependent on the value at another time . A series is serially independent if there is no dependence between any pair. If a time series is stationary, then statistical dependence between the pair would imply that there is statistical dependence between all pairs of values at the same lag . See also Autocorrelation matrix Autocorrelation technique Autocorrelation of a formal word Autocorrelator Correlation function Correlogram Cross-correlation Galton's problem Partial autocorrelation function Fluorescence correlation spectroscopy Optical autocorrelation Pitch detection algorithm Triple correlation CUSUM Cochrane–Orcutt estimation (transformation for autocorrelated error terms) Prais–Winsten transformation Scaled correlation Unbiased estimation of standard deviation References Further reading Mojtaba Soltanalian, and Petre Stoica. "Computational design of sequences with good correlation properties." IEEE Transactions on Signal Processing, 60.5 (2012): 2180–2193. Solomon W. Golomb, and Guang Gong. Signal design for good correlation: for wireless communication, cryptography, and radar. Cambridge University Press, 2005. Klapetek, Petr (2018). Quantitative Data Processing in Scanning Probe Microscopy: SPM Applications for Nanometrology (Second ed.). Elsevier. pp. 108–112 . Signal processing Time domain analysis

2726

https://en.wikipedia.org/wiki/Atlas%20Autocode

Atlas Autocode

Atlas Autocode (AA) is a programming language developed around 1965 at the University of Manchester. A variant of the language ALGOL, it was developed by Tony Brooker and Derrick Morris for the Atlas computer. The word Autocode was basically an early term for programming language. Different autocodes could vary greatly. Features AA featured explicitly typed variables, subroutines, and functions. It omitted some ALGOL features such as passing parameters by name, which in ALGOL 60 means passing the memory address of a short subroutine to recalculate a parameter each time it is mentioned. The AA compiler generated range-checking for array accesses, and allowed an array to have dimensions that were determined at runtime, i.e., an array could be declared as integer array Thing (i:j), where i and j were calculated values. AA high-level routines can include machine code, either to make an inner loop more efficient or to effect some operation which otherwise cannot be done easily. AA includes a complex data type to represent complex numbers, partly because of pressure from the electrical engineering department, as complex numbers are used to represent the behavior of alternating current. The imaginary unit square root of -1 was represented by i, which was treated as a fixed complex constant = i. The complex data type was dropped when Atlas Autocode later evolved into the language Edinburgh IMP. IMP was an extension of AA and was used to write the Edinburgh Multiple Access System (EMAS) operating system. AA's second-greatest claim to fame (after being the progenitor of IMP and EMAS) was that it had many of the features of the original Compiler Compiler. A variant of the AA compiler included run-time support for a top-down recursive descent parser. The style of parser used in the Compiler Compiler was in use continuously at Edinburgh from the 60's until almost the year 2000. Other Autocodes were developed for the Titan computer, a prototype Atlas 2 at Cambridge, and the Ferranti Mercury. Syntax Atlas Autocode's syntax was largely similar to ALGOL, though it was influenced by the output device which the author had available, a Friden Flexowriter. Thus, it allowed symbols like ½ for .5 and the superscript 2 for to the power of 2. The Flexowriter supported overstriking and thus, AA did also: up to three characters could be overstruck as a single symbol. For example, the character set had no ↑ symbol, so exponentiation was an overstrike of | and *. The aforementioned underlining of reserved words (keywords) could also be done using overstriking. The language is described in detail in the Atlas Autocode Reference Manual. Other Flexowriter characters that were found a use in AA were: α in floating-point numbers, e.g., 3.56α-7 for modern 3.56e-7 ; β to mean the second half of a 48-bit Atlas memory word; π for the mathematical constant pi. When AA was ported to the English Electric KDF9 computer, the character set was changed to International Organization for Standardization (ISO) and that compiler has been recovered from an old paper tape by the Edinburgh Computer History Project and is available online, as is a high-quality scan of the original Edinburgh version of the Atlas Autocode manual. Keywords in AA were distinguishable from other text by being underlined, which was implemented via overstrike in the Flexowriter (compare to bold in ALGOL). There were also two stropping regimes. First, there was an "uppercasedelimiters" mode where all uppercase letters (outside strings) were treated as underlined lowercase. Second, in some versions (but not in the original Atlas version), it was possible to strop keywords by placing a "%" sign in front of them, for example the keyword endofprogramme could be typed as %end %of %programme or %endofprogramme. This significantly reduced typing, due to only needing one character, rather than overstriking the whole keyword. As in ALGOL, there were no reserved words in the language as keywords were identified by underlining (or stropping), not by recognising reserved character sequences. In the statement if token=if then result = token, there is both a keyword if and a variable named if. As in ALGOL, AA allowed spaces in variable names, such as integer previous value. Spaces were not significant and were removed before parsing in a trivial pre-lexing stage called "line reconstruction". What the compiler would see in the above example would be "iftoken=ifthenresult=token". Spaces were possible due partly to keywords being distinguished in other ways, and partly because the source was processed by scannerless parsing, without a separate lexing phase, which allowed the lexical syntax to be context-sensitive. The syntax for expressions let the multiplication operator be omitted, e.g., 3a was treated as 3*a, and a(i+j) was treated as a*(i+j) if a was not an array. In ambiguous uses, the longest possible name was taken (maximal munch), for example ab was not treated as a*b, whether or not a and b had been declared. In the original Atlas Autocode for the Atlas computer, Atlas machine code instructions could be interpolated between the AA statements. References Ferranti History of computing in the United Kingdom Structured programming languages

2729

https://en.wikipedia.org/wiki/Arthur%20J.%20Stone

Arthur J. Stone

Arthur J. Stone (1847–1938), a leading American silversmith, was born, trained and worked in Sheffield, England, and Edinburgh, Scotland, before travelling to the United States in 1884. He was one of the last silversmiths in America to train apprentices to carry out designs in hand-wrought silver. In 1901, Stone set up a workshop in Gardner, Massachusetts which operated under his name until its sale in 1937 to Henry Heywood. Heywood was a Gardner businessman, who renamed it The Stone Silver Shop, and later, Stone Associates. Heywood died in 1945. His sons Henry, Jr. and Jerome ran Stone Associates until 1957. One of the silversmiths in Arthur Stone's shop was George Porter Blanchard, father of silversmith Porter Blanchard. References External links Work examples and makers' marks Samples of his work Samples of his work Article on Stone silver Notes on his career and a picture of him at work 1847 births 1938 deaths Artists from Sheffield American silversmiths British emigrants to the United States

2732

https://en.wikipedia.org/wiki/Au%20file%20format

Au file format

The Au file format is a simple audio file format introduced by Sun Microsystems. The format was common on NeXT systems and on early Web pages. Originally it was headerless, being simply 8-bit μ-law-encoded data at an 8000 Hz sample rate. Hardware from other vendors often used sample rates as high as 8192 Hz, often integer multiples of video clock signal frequencies. Newer files have a header that consists of six unsigned 32-bit words, an optional information chunk and then the data (in big endian format). Although the format now supports many audio encoding formats, it remains associated with the μ-law logarithmic encoding. This encoding was native to the SPARCstation 1 hardware, where SunOS exposed the encoding to application programs through the /dev/audio interface. This encoding and interface became a de facto standard for Unix sound. New format All fields are stored in big-endian format, including the sample data. The type of encoding depends on the value of the "encoding" field (word 3 of the header). Formats 2 through 7 are uncompressed linear PCM, therefore technically lossless (although not necessarily free of quantization error, especially in 8-bit form). Formats 1 and 27 are μ-law and A-law, respectively, both companding logarithmic representations of PCM, and arguably lossy as they pack what would otherwise be almost 16 bits of dynamic range into 8 bits of encoded data, even though this is achieved by an altered dynamic response and no data is actually "thrown away". Formats 23 through 26 are ADPCM, which is an early form of lossy compression, usually but not always with 4 bits of encoded data per audio sample (for 4:1 efficiency with 16-bit input, or 2:1 with 8-bit; equivalent to e.g. encoding CD quality MP3 at a 352kbit rate using a low quality encoder). Several of the others are DSP commands or data, designed to be processed by the NeXT Music Kit software. Note: PCM formats are encoded as signed data (as opposed to unsigned). Following the header structure is a variable-length annotation field. The contents of this field are currently undefined, except that its length must be a multiple of eight bytes and it must be terminated with at least one null (zero) byte. The audio data segment begins on an eight-byte boundary immediately following the annotation field. Audio data is encoded in the format identified by the file header. The current implementation supports only a single audio data segment per file. The variable-length annotation field is currently ignored by most audio applications. External links Sun .au sound file format Audio File Format Specifications Computer file formats Digital container formats Audio codecs

2733

https://en.wikipedia.org/wiki/April%2025

April 25

Events Pre-1600 404 BC – Admiral Lysander and King Pausanias of Sparta blockade Athens and bring the Peloponnesian War to a successful conclusion. 775 – The Battle of Bagrevand puts an end to an Armenian rebellion against the Abbasid Caliphate. Muslim control over the South Caucasus is solidified and its Islamization begins, while several major Armenian nakharar families lose power and their remnants flee to the Byzantine Empire. 799 – After mistreatment and disfigurement by the citizens of Rome, pope Leo III flees to the Frankish court of king Charlemagne at Paderborn for protection. 1134 – The name Zagreb was mentioned for the first time in the Felician Charter relating to the establishment of the Zagreb Bishopric around 1094. 1601–1900 1607 – Eighty Years' War: The Dutch fleet destroys the anchored Spanish fleet at Gibraltar. 1644 – Transition from Ming to Qing: The Chongzhen Emperor, the last Emperor of Ming China, commits suicide during a peasant rebellion led by Li Zicheng. 1707 – A coalition of Britain, the Netherlands and Portugal is defeated by a Franco-Spanish army at Almansa (Spain) in the War of the Spanish Succession. 1792 – Highwayman Nicolas J. Pelletier becomes the first person executed by guillotine. 1792 – "La Marseillaise" (the French national anthem) is composed by Claude Joseph Rouget de Lisle. 1829 – Charles Fremantle arrives in HMS Challenger off the coast of modern-day Western Australia prior to declaring the Swan River Colony for the British Empire. 1846 – Thornton Affair: Open conflict begins over the disputed border of Texas, triggering the Mexican–American War. 1849 – The Governor General of Canada, Lord Elgin, signs the Rebellion Losses Bill, outraging Montreal's English population and triggering the Montreal Riots. 1859 – British and French engineers break ground for the Suez Canal. 1862 – American Civil War: Forces under U.S. Admiral David Farragut demand the surrender of the Confederate city of New Orleans, Louisiana. 1864 – American Civil War: In the Battle of Marks' Mills, a force of 8,000 Confederate soldiers attacks 1,800 Union soldiers and a large number of wagon teamsters, killing or wounding 1,500 Union combatants. 1882 – French and Vietnamese troops clashed in Tonkin, when Commandant Henri Rivière seized the citadel of Hanoi with a small force of marine infantry. 1898 – Spanish–American War: The United States Congress declares that a state of war between the U.S. and Spain has existed since April 21, when an American naval blockade of the Spanish colony of Cuba began. 1901–present 1901 – New York becomes the first U.S. state to require automobile license plates. 1915 – World War I: The Battle of Gallipoli begins: The invasion of the Turkish Gallipoli Peninsula by British, French, Indian, Newfoundland, Australian and New Zealand troops, begins with landings at Anzac Cove and Cape Helles. 1916 – Anzac Day is commemorated for the first time on the first anniversary of the landing at ANZAC Cove. 1920 – At the San Remo conference, the principal Allied Powers of World War I adopt a resolution to determine the allocation of Class "A" League of Nations mandates for administration of the former Ottoman-ruled lands of the Middle East. 1938 – U.S. Supreme Court delivers its opinion in Erie Railroad Co. v. Tompkins and overturns a century of federal common law. 1944 – The United Negro College Fund is incorporated. 1945 – Elbe Day: United States and Soviet reconnaissance troops meet in Torgau and Strehla along the River Elbe, cutting the Wehrmacht of Nazi Germany in two. 1945 – Liberation Day (Italy): The National Liberation Committee for Northern Italy calls for a general uprising against the German occupation and the Italian Social Republic. 1945 – United Nations Conference on International Organization: Founding negotiations for the United Nations begin in San Francisco. 1945 – The last German troops retreat from Finland's soil in Lapland, ending the Lapland War. Military acts of Second World War end in Finland. 1951 – Korean War: Assaulting Chinese forces are forced to withdraw after heavy fighting with UN forces, primarily made up of Australian and Canadian troops, at the Battle of Kapyong. 1953 – Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA. 1954 – The first practical solar cell is publicly demonstrated by Bell Telephone Laboratories. 1959 – The Saint Lawrence Seaway, linking the North American Great Lakes and the Atlantic Ocean, officially opens to shipping. 1960 – The United States Navy submarine completes the first submerged circumnavigation of the globe. 1961 – Robert Noyce is granted a patent for an integrated circuit. 1972 – Vietnam War: Nguyen Hue Offensive: The North Vietnamese 320th Division forces 5,000 South Vietnamese troops to retreat and traps about 2,500 others northwest of Kontum. 1974 – Carnation Revolution: A leftist military coup in Portugal overthrows the authoritarian-conservative Estado Novo regime and establishes a democratic government. 1981 – More than 100 workers are exposed to radiation during repairs of at the Tsuruga Nuclear Power Plant in Japan. 1982 – Israel completes its withdrawal from the Sinai Peninsula per the Camp David Accords. 1983 – Cold War: American schoolgirl Samantha Smith is invited to visit the Soviet Union by its leader Yuri Andropov after he read her letter in which she expressed fears about nuclear war. 1983 – Pioneer 10 travels beyond Pluto's orbit. 1988 – In Israel, John Demjanjuk is sentenced to death for war crimes committed in World War II. 1990 – Violeta Chamorro takes office as the President of Nicaragua, the first woman to hold the position. 2001 – President George W. Bush pledges U.S. military support in the event of a Chinese attack on Taiwan. 2004 – The March for Women's Lives brings between 500,000 and 800,000 protesters, mostly pro-choice, to Washington D.C. to protest the Partial-Birth Abortion Ban Act of 2003, and other restrictions on abortion. 2005 – The final piece of the Obelisk of Axum is returned to Ethiopia after being stolen by the invading Italian army in 1937. 2005 – Bulgaria and Romania sign the Treaty of Accession 2005 to join the European Union. 2007 – Boris Yeltsin's funeral: The first to be sanctioned by the Russian Orthodox Church for a head of state since the funeral of Emperor Alexander III in 1894. 2015 – Nearly 9,100 are killed after a massive 7.8 magnitude earthquake strikes Nepal. Births Pre-1600 1214 – Louis IX of France (d. 1270) 1228 – Conrad IV of Germany (d. 1254) 1284 – Edward II of England (d. 1327) 1287 – Roger Mortimer, 1st Earl of March, English politician, Lord Lieutenant of Ireland (d. 1330) 1502 – Georg Major, German theologian and academic (d. 1574) 1529 – Francesco Patrizi, Italian philosopher and scientist (d. 1597) 1599 – Oliver Cromwell, English general and politician, Lord Protector of Great Britain (d. 1658) 1601–1900 1621 – Roger Boyle, 1st Earl of Orrery, English soldier and politician (d. 1679) 1666 – Johann Heinrich Buttstett, German organist and composer (d. 1727) 1694 – Richard Boyle, 3rd Earl of Burlington, English architect and politician, Lord High Treasurer of Ireland (d. 1753) 1710 – James Ferguson, Scottish astronomer and author (d. 1776) 1723 – Giovanni Marco Rutini, Italian composer (d. 1797) 1725 – Augustus Keppel, 1st Viscount Keppel, English admiral and politician (d. 1786) 1767 – Nicolas Oudinot, French general (d. 1847) 1770 – Georg Sverdrup, Norwegian philologist and academic (d. 1850) 1776 – Princess Mary, Duchess of Gloucester and Edinburgh (d. 1857) 1843 – Princess Alice of the United Kingdom (d. 1878) 1849 – Felix Klein, German mathematician and academic (d. 1925) 1850 – Luise Adolpha Le Beau, German composer and educator (d. 1927) 1851 – Leopoldo Alas, Spanish author, critic, and academic (d. 1901) 1854 – Charles Sumner Tainter, American engineer and inventor (d. 1940) 1862 – Edward Grey, 1st Viscount Grey of Fallodon, English ornithologist and politician, Secretary of State for Foreign and Commonwealth Affairs (d. 1933) 1868 – John Moisant, American pilot and engineer (d. 1910) 1871 – Lorne Currie, French-English sailor (d. 1926) 1872 – C. B. Fry, English cricketer, footballer, educator, and politician (d. 1956) 1873 – Walter de la Mare, English poet, short story writer, and novelist (d. 1956) 1873 – Howard Garis, American author, creator of the Uncle Wiggily series of children's stories (d. 1962) 1874 – Guglielmo Marconi, Italian businessman and inventor, developed Marconi's law, Nobel Prize laureate (d. 1937) 1874 – Ernest Webb, English-Canadian race walker (d. 1937) 1876 – Jacob Nicol, Canadian publisher, lawyer, and politician (d. 1958) 1878 – William Merz, American gymnast and triathlete (d. 1946) 1882 – Fred McLeod, Scottish golfer (d. 1976) 1887 – Kojo Tovalou Houénou, Beninese lawyer and critic (d. 1936) 1892 – Maud Hart Lovelace, American author (d. 1980) 1896 – Fred Haney, American baseball player, coach, and manager (d. 1977) 1897 – Mary, Princess Royal and Countess of Harewood (d. 1965) 1900 – Gladwyn Jebb, English politician and diplomat, Secretary-General of the United Nations (d. 1996) 1900 – Wolfgang Pauli, Austrian-Swiss-American physicist and academic, Nobel Prize laureate (d. 1958) 1901–present 1902 – Werner Heyde, German psychiatrist and academic (d. 1964) 1902 – Mary Miles Minter, American actress (d. 1984) 1903 – Andrey Kolmogorov, Russian mathematician and academic (d. 1987) 1905 – George Nēpia, New Zealand rugby player and referee (d. 1986) 1906 – William J. Brennan Jr., American colonel and Associate Justice of the United States Supreme Court (d. 1997) 1908 – Edward R. Murrow, American journalist (d. 1965) 1909 – William Pereira, American architect, designed the Transamerica Pyramid (d. 1985) 1910 – Arapeta Awatere, New Zealand interpreter, military leader, politician, and murderer (d. 1976) 1911 – Connie Marrero, Cuban baseball player and coach (d. 2014) 1912 – Earl Bostic, African-American saxophonist (d. 1965) 1913 – Nikolaos Roussen, Greek captain (d. 1944) 1914 – Ross Lockridge Jr., American author and academic (d. 1948) 1915 – Mort Weisinger, American journalist and author (d. 1978) 1916 – Jerry Barber, American golfer (d. 1994) 1917 – Ella Fitzgerald, American singer (d. 1996) 1917 – Jean Lucas, French racing driver (d. 2003) 1918 – Graham Payn, South African-born English actor and singer (d. 2005) 1918 – Gérard de Vaucouleurs, French-American astronomer and academic (d. 1995) 1918 – Astrid Varnay, Swedish-American soprano and actress (d. 2006) 1919 – Finn Helgesen, Norwegian speed skater (d. 2011) 1921 – Karel Appel, Dutch painter and sculptor (d. 2006) 1923 – Francis Graham-Smith, English astronomer and academic 1923 – Melissa Hayden, Canadian ballerina (d. 2006) 1923 – Albert King, African-American singer-songwriter, guitarist, and producer (d. 1992) 1924 – Ingemar Johansson, Swedish race walker (d. 2009) 1924 – Franco Mannino, Italian pianist, composer, director, and playwright (d. 2005) 1924 – Paulo Vanzolini, Brazilian singer-songwriter and zoologist (d. 2013) 1925 – Tony Christopher, Baron Christopher, English trade union leader and businessman 1925 – Sammy Drechsel, German comedian and journalist (d. 1986) 1925 – Louis O'Neil, Canadian academic and politician (d. 2018) 1926 – Johnny Craig, American author and illustrator (d. 2001) 1926 – Gertrude Fröhlich-Sandner, Austrian politician (d. 2008) 1926 – Patricia Castell, Argentine actress (d. 2013) 1927 – Corín Tellado, Spanish author (d. 2009) 1927 – Albert Uderzo, French author and illustrator (d. 2020) 1928 – Cy Twombly, American-Italian painter and sculptor (d. 2011) 1929 – Yvette Williams, New Zealand long jumper, shot putter, and discus thrower (d. 2019) 1930 – Paul Mazursky, American actor, director, and screenwriter (d. 2014) 1930 – Godfrey Milton-Thompson, English admiral and surgeon (d. 2012) 1930 – Peter Schulz, German lawyer and politician, Mayor of Hamburg (d. 2013) 1931 – Felix Berezin, Russian mathematician and physicist (d. 1980) 1931 – David Shepherd, English painter and author (d. 2017) 1932 – Nikolai Kardashev, Russian astrophysicist (d. 2019) 1932 – Meadowlark Lemon, African-American basketball player and minister (d. 2015) 1932 – Lia Manoliu, Romanian discus thrower and politician (d. 1998) 1933 – Jerry Leiber, American songwriter and producer (d. 2011) 1933 – Joyce Ricketts, American baseball player (d. 1992) 1934 – Peter McParland, Northern Irish footballer and manager 1935 – Bob Gutowski, American pole vaulter (d. 1960) 1935 – Reinier Kreijermaat, Dutch footballer (d. 2018) 1936 – Henck Arron, Surinamese banker and politician, 1st Prime Minister of the Republic of Suriname (d. 2000) 1938 – Roger Boisjoly, American aerodynamicist and engineer (d. 2012) 1938 – Ton Schulten, Dutch painter and graphic designer 1939 – Tarcisio Burgnich, Italian footballer and manager (d. 2021) 1939 – Michael Llewellyn-Smith, English academic and diplomat 1939 – Robert Skidelsky, Baron Skidelsky, English historian and academic 1939 – Veronica Sutherland, English academic and British diplomat 1940 – Al Pacino, American actor and director 1941 – Bertrand Tavernier, French actor, director, producer, and screenwriter (d. 2021) 1942 – Jon Kyl, American lawyer and politician 1943 – Tony Christie, English singer-songwriter and actor 1944 – Len Goodman, English dancer 1944 – Mike Kogel, German singer-songwriter 1944 – Stephen Nickell, English economist and academic 1944 – Bruce Ponder, English geneticist and cancer researcher 1945 – Stu Cook, American bass player, songwriter, and producer 1945 – Richard C. Hoagland, American theorist and author 1945 – Björn Ulvaeus, Swedish singer-songwriter and producer 1946 – Talia Shire, American actress 1946 – Peter Sutherland, Irish lawyer and politician, Attorney General of Ireland (d. 2018) 1946 – Vladimir Zhirinovsky, Russian colonel, lawyer, and politician 1947 – Johan Cruyff, Dutch footballer and manager (d. 2016) 1947 – Jeffrey DeMunn, American actor 1947 – Cathy Smith, Canadian singer and drug dealer (d. 2020) 1948 – Mike Selvey, English cricketer and sportscaster 1948 – Yu Shyi-kun, Taiwanese politician, 39th Premier of the Republic of China 1949 – Vicente Pernía, Argentinian footballer and race car driver 1949 – Dominique Strauss-Kahn, French economist, lawyer, and politician, French Minister of Finance 1949 – James Fenton, English poet, journalist and literary critic 1950 – Donnell Deeny, Northern Irish lawyer and judge 1950 – Steve Ferrone, English drummer 1950 – Peter Hintze, German politician (d. 2016) 1950 – Valentyna Kozyr, Ukrainian high jumper 1951 – Ian McCartney, Scottish politician, Minister of State for Trade 1952 – Ketil Bjørnstad, Norwegian pianist and composer 1952 – Vladislav Tretiak, Russian ice hockey player and coach 1952 – Jacques Santini, French footballer and coach 1953 – Ron Clements, American animator, producer, and screenwriter 1953 – Gary Cosier, Australian cricketer 1953 – Anthony Venables, English economist, author, and academic 1954 – Melvin Burgess, English author 1954 – Randy Cross, American football player and sportscaster 1954 – Róisín Shortall, Irish educator and politician 1955 – Américo Gallego, Argentinian footballer and coach 1955 – Parviz Parastui, Iranian actor and singer 1955 – Zev Siegl, American businessman, co-founded Starbucks 1956 – Dominique Blanc, French actress, director, and screenwriter 1956 – Abdalla Uba Adamu, Nigerian professor, media scholar 1957 – Theo de Rooij, Dutch cyclist and manager 1958 – Fish, Scottish singer-songwriter 1958 – Misha Glenny, British journalist 1959 – Paul Madden, English diplomat, British High Commissioner to Australia 1959 – Daniel Kash, Canadian actor and director 1959 – Tony Phillips, American baseball player (d. 2016) 1960 – Paul Baloff, American singer (d. 2002) 1960 – Robert Peston, English journalist 1961 – Dinesh D'Souza, Indian-American journalist and author 1961 – Miran Tepeš, Slovenian ski jumper 1962 – Foeke Booy, Dutch footballer and manager 1963 – Joy Covey, American businesswoman (d. 2013) 1963 – Dave Martin, English footballer 1963 – David Moyes, Scottish footballer and manager 1963 – Bernd Müller, German footballer and manager 1963 – Paul Wassif, English singer-songwriter and guitarist 1964 – Hank Azaria, American actor, voice artist, comedian and producer 1964 – Andy Bell, English singer-songwriter 1965 – Eric Avery, American bass player and songwriter 1965 – Mark Bryant, American basketball player and coach 1965 – John Henson, American puppeteer and voice actor (d. 2014) 1966 – Diego Domínguez, Argentinian-Italian rugby player 1966 – Femke Halsema, Dutch sociologist, academic, and politician 1966 – Darren Holmes, American baseball player and coach 1966 – Erik Pappas, American baseball player and coach 1967 – Angel Martino, American swimmer 1968 – Vitaliy Kyrylenko, Ukrainian long jumper 1968 – Thomas Strunz, German footballer 1969 – Joe Buck, American sportscaster 1969 – Martin Koolhoven, Dutch director and screenwriter 1969 – Jon Olsen, American swimmer 1969 – Darren Woodson, American football player and sportscaster 1969 – Renée Zellweger, American actress and producer 1970 – Jason Lee, American skateboarder, actor, comedian and producer 1971 – Sara Baras, Spanish dancer 1971 – Brad Clontz, American baseball player 1973 – Carlota Castrejana, Spanish triple jumper 1973 – Fredrik Larzon, Swedish drummer 1973 – Barbara Rittner, German tennis player 1975 – Jacque Jones, American baseball player and coach 1976 – Gilberto da Silva Melo, Brazilian footballer 1976 – Tim Duncan, American basketball player 1976 – Breyton Paulse, South African rugby player 1976 – Rainer Schüttler, German tennis player and coach 1977 – Constantinos Christoforou, Cypriot singer-songwriter 1977 – Ilias Kotsios, Greek footballer 1977 – Marguerite Moreau, American actress and producer 1977 – Matthew West, American singer-songwriter, guitarist, and actor 1978 – Matt Walker, English swimmer 1980 – Ben Johnston, Scottish drummer and songwriter 1980 – James Johnston, Scottish bass player and songwriter 1980 – Daniel MacPherson, Australian actor and television host 1980 – Bruce Martin, New Zealand cricketer 1980 – Kazuhito Tadano, Japanese baseball player 1980 – Alejandro Valverde, Spanish cyclist 1981 – Dwone Hicks, American football player 1981 – Felipe Massa, Brazilian racing driver 1981 – John McFall, English sprinter 1981 – Anja Pärson, Swedish skier 1982 – Brian Barton, American baseball player 1982 – Monty Panesar, English cricketer 1982 – Marco Russo, Italian footballer 1983 – Johnathan Thurston, Australian rugby league player 1983 – DeAngelo Williams, American football player 1984 – Robert Andino, American baseball player 1984 – Isaac Kiprono Songok, Kenyan runner 1985 – Giedo van der Garde, Dutch racing driver 1986 – Alexei Emelin, Russian ice hockey player 1986 – Thin Seng Hon, Cambodian Paralympic athlete 1986 – Gwen Jorgensen, American triathlete 1986 – Claudia Rath, German heptathlete 1987 – Razak Boukari, Togolese footballer 1987 – Jay Park, American-South Korean singer-songwriter and dancer 1987 – Johann Smith, American soccer player 1988 – James Sheppard, Canadian ice hockey player 1989 – Marie-Michèle Gagnon, Canadian skier 1989 – Michael van Gerwen, Dutch darts player 1989 – Gedhun Choekyi Nyima, the 11th Panchen Lama, one of the highest-ranking spiritual leaders in Tibet 1990 – Jean-Éric Vergne, French racing driver 1990 – Taylor Walker, Australian footballer 1991 – Alex Shibutani, American ice dancer 1993 – Alex Bowman, American race car driver 1993 – Daniel Norris, American baseball player 1994 – Omar McLeod, Jamaican hurdler 1995 – Lewis Baker, English footballer 1996 – Mack Horton, Australian swimmer 1997 – Julius Ertlthaler, Austrian footballer Deaths Pre-1600 501 – Rusticus, saint and archbishop of Lyon (b. 455) 775 – Smbat VII Bagratuni, Armenian prince 775 – Mushegh VI Mamikonian, Armenian prince 908 – Zhang Wenwei, Chinese chancellor 1074 – Herman I, Margrave of Baden 1077 – Géza I of Hungary (b. 1040) 1185 – Emperor Antoku of Japan (b. 1178) 1217 – Hermann I, Landgrave of Thuringia 1228 – Queen Isabella II of Jerusalem (b. 1212) 1243 – Boniface of Valperga, Bishop of Aosta 1264 – Roger de Quincy, 2nd Earl of Winchester, medieval English nobleman; Earl of Winchester (b. 1195) 1295 – Sancho IV of Castile (b. 1258) 1342 – Pope Benedict XII (b. 1285) 1397 – Thomas Holland, 2nd Earl of Kent, English nobleman 1472 – Leon Battista Alberti, Italian author, poet, and philosopher (b. 1404) 1516 – John Yonge, English diplomat (b. 1467) 1566 – Louise Labé, French poet and author (b. 1520) 1566 – Diane de Poitiers, mistress of King Henry II of France (b. 1499) 1595 – Torquato Tasso, Italian poet and songwriter (b. 1544) 1601–1900 1605 – Naresuan, Siamese King of Ayutthaya Kingdom (b. c. 1555) 1644 – Chongzhen Emperor of China (b. 1611) 1660 – Henry Hammond, English cleric and theologian (b. 1605) 1690 – David Teniers the Younger, Flemish painter and educator (b. 1610) 1744 – Anders Celsius, Swedish astronomer, physicist, and mathematician (b. 1701) 1770 – Jean-Antoine Nollet, French minister, physicist, and academic (b. 1700) 1800 – William Cowper, English poet (b. 1731) 1840 – Siméon Denis Poisson, French mathematician and physicist (b. 1781) 1873 – Fyodor Petrovich Tolstoy, Russian painter and sculptor (b. 1783) 1875 – 12th Dalai Lama (b. 1857) 1878 – Anna Sewell, English author (b. 1820) 1890 – Crowfoot, Canadian tribal chief (b. 1830) 1891 – Nathaniel Woodard, English priest and educator (b. 1811) 1892 – Henri Duveyrier, French explorer (b. 1840) 1892 – Karl von Ditmar, Estonian-German geologist and explorer (b. 1822) 1901–present 1906 – John Knowles Paine, American composer and educator (b. 1839) 1911 – Emilio Salgari, Italian journalist and author (b. 1862) 1913 – Joseph-Alfred Archambeault, Canadian bishop (b. 1859) 1915 – Frederick W. Seward, American journalist, lawyer, and politician, 6th United States Assistant Secretary of State (b. 1830) 1919 – Augustus D. Juilliard, American businessman and philanthropist (b. 1836) 1921 – Emmeline B. Wells, American journalist and women's rights advocate (b. 1828) 1923 – Louis-Olivier Taillon, Canadian lawyer and politician, 8th Premier of Quebec (b. 1840) 1928 – Pyotr Nikolayevich Wrangel, Russian general (b. 1878) 1941 – Salih Bozok, Turkish commander and politician (b. 1881) 1943 – Vladimir Nemirovich-Danchenko, Russian director, producer, and playwright (b. 1858) 1944 – George Herriman, American cartoonist (b. 1880) 1944 – Tony Mullane, Irish-American baseball player (b. 1859) 1944 – William Stephens, American engineer and politician, 24th Governor of California (b. 1859) 1945 – Huldreich Georg Früh, Swiss composer (b. 1903) 1961 – Robert Garrett, American discus thrower and shot putter (b. 1875) 1970 – Anita Louise, American actress (b. 1915) 1972 – George Sanders, English actor (b. 1906) 1973 – Olga Grey, Hungarian-American actress (b. 1896) 1974 – Gustavo R. Vincenti, Maltese architect and developer (b. 1888) 1975 – Mike Brant, Israeli singer and songwriter (b.1947) 1976 – Carol Reed, English director and producer (b. 1906) 1976 – Markus Reiner, Israeli engineer and educator (b. 1886) 1982 – John Cody, American cardinal (b. 1907) 1983 – William S. Bowdern, American priest and author (b. 1897) 1988 – Carolyn Franklin, American singer-songwriter (b. 1944) 1988 – Clifford D. Simak, American journalist and author (b. 1904) 1990 – Dexter Gordon, American saxophonist, composer, and actor (b. 1923) 1992 – Yutaka Ozaki, Japanese singer-songwriter (b. 1965) 1995 – Art Fleming, American game show host (b. 1925) 1995 – Ginger Rogers, American actress, singer, and dancer (b. 1911) 1995 – Lev Shankovsky, Ukrainian military historian (b. 1903) 1996 – Saul Bass, American graphic designer and director (b. 1920) 1998 – Wright Morris, American author and photographer (b. 1910) 1999 – Michael Morris, 3rd Baron Killanin, Irish journalist and author (b. 1914) 1999 – Roger Troutman, American singer-songwriter and producer (b. 1951) 2000 – Lucien Le Cam, French mathematician and statistician (b. 1924) 2000 – David Merrick, American director and producer (b. 1911) 2001 – Michele Alboreto, Italian racing driver (b. 1956) 2002 – Lisa Lopes, American rapper and dancer (b. 1971) 2003 – Samson Kitur, Kenyan runner (b. 1966) 2004 – Thom Gunn, English-American poet and academic (b. 1929) 2005 – Jim Barker, American politician (b. 1935) 2005 – Swami Ranganathananda, Indian monk and educator (b. 1908) 2006 – Jane Jacobs, American-Canadian journalist, author, and activist (b. 1916) 2006 – Peter Law, Welsh politician and independent member of parliament (b. 1948) 2007 – Alan Ball Jr., English footballer and manager (b. 1945) 2007 – Arthur Milton, English footballer and cricketer (b. 1928) 2007 – Bobby Pickett, American singer-songwriter (b. 1938) 2008 – Humphrey Lyttelton, English trumpet player, composer, and radio host (b. 1921) 2009 – Bea Arthur, American actress and singer (b. 1922) 2010 – Dorothy Provine, American actress and singer (b. 1935) 2010 – Alan Sillitoe, English novelist, short story writer, essayist, and poet (b. 1928) 2011 – Poly Styrene, British musician (b. 1957) 2012 – Gerry Bahen, Australian footballer (b. 1929) 2012 – Denny Jones, American rancher and politician (b. 1910) 2012 – Moscelyne Larkin, American ballerina and educator (b. 1925) 2012 – Louis le Brocquy, Irish painter and illustrator (b. 1916) 2013 – Brian Adam, Scottish biochemist and politician (b. 1948) 2013 – Jacob Avshalomov, American composer and conductor (b. 1919) 2013 – György Berencsi, Hungarian virologist and academic (b. 1941) 2013 – Rick Camp, American baseball player (b. 1953) 2014 – Dan Heap, Canadian priest and politician (b. 1925) 2014 – William Judson Holloway Jr., American soldier, lawyer, and judge (b. 1923) 2014 – Earl Morrall, American football player and coach (b. 1934) 2014 – Tito Vilanova, Spanish footballer and manager (b. 1968) 2014 – Stefanie Zweig, German journalist and author (b. 1932) 2015 – Jim Fanning, American-Canadian baseball player and manager (b. 1927) 2015 – Matthias Kuhle, German geographer and academic (b. 1948) 2015 – Don Mankiewicz, American screenwriter and novelist (b. 1922) 2015 – Mike Phillips, American basketball player (b. 1956) 2016 – Tom Lewis, Australian politician, 33rd Premier of New South Wales (b. 1922) 2018 – Madeeha Gauhar, Pakistani actress, playwright and director of social theater, and women's rights activist (b. 1956) 2019 – John Havlicek, American basketball player (b. 1940) Holidays and observances Anniversary of the First Cabinet of Kurdish Government (Iraqi Kurdistan) Anzac Day (Australia, New Zealand) Arbor Day (Germany) Christian feast day: Giovanni Battista Piamarta Major Rogation (Western Christianity) Mark the Evangelist Maughold Peter of Saint Joseph de Betancur Philo and Agathopodes Anianus of Alexandria April 25 (Eastern Orthodox liturgics) Last day on which Easter Sunday can fall (last in 1943, will not happen again until 2038), while March 22 is the earliest. Flag Day (Faroe Islands) Freedom Day (Portugal) Liberation Day (Italy) Liberation Day (South Georgia) Military Foundation Day (North Korea) Parental Alienation Awareness Day Sinai Liberation Day (Egypt) World Malaria Day References External links BBC: On This Day Historical Events on April 25 Today in Canadian History Days of the year April

2734

https://en.wikipedia.org/wiki/April%2024

April 24

Events Pre-1600 1479 BC – Thutmose III ascends to the throne of Egypt, although power effectively shifts to Hatshepsut (according to the Low Chronology of the 18th dynasty). 1183 BC – Traditional reckoning of the Fall of Troy marking the end of the legendary Trojan War, given by chief librarian of the Library of Alexandria Erastothenes, among others. 1547 – Battle of Mühlberg. Duke of Alba, commanding Spanish-Imperial forces of Charles I of Spain, defeats the troops of Schmalkaldic League. 1558 – Mary, Queen of Scots, marries the Dauphin of France, François, at Notre Dame de Paris. 1601–1900 1704 – The first regular newspaper in British Colonial America, The Boston News-Letter, is published. 1793 – French revolutionary Jean-Paul Marat is acquitted by the Revolutionary Tribunal of charges brought by the Girondin in Paris. 1800 – The United States Library of Congress is established when President John Adams signs legislation to appropriate $5,000 to purchase "such books as may be necessary for the use of Congress". 1837 – The great fire in Surat city of India caused more than 500 deaths and destruction of more than 9000 houses. 1877 – Russo-Turkish War: Russian Empire declares war on Ottoman Empire. 1885 – American sharpshooter Annie Oakley is hired by Nate Salsbury to be a part of Buffalo Bill's Wild West. 1895 – Joshua Slocum, the first person to sail single-handedly around the world, sets sail from Boston, Massachusetts aboard the sloop "Spray". 1901–present 1913 – The Woolworth Building, a skyscraper in New York City, is opened. 1914 – The Franck–Hertz experiment, a pillar of quantum mechanics, is presented to the German Physical Society. 1915 – The arrest of 250 Armenian intellectuals and community leaders in Istanbul marks the beginning of the Armenian genocide. 1916 – Easter Rising: Irish rebels, led by Patrick Pearse and James Connolly, launch an uprising in Dublin against British rule and proclaim an Irish Republic. 1916 – Ernest Shackleton and five men of the Imperial Trans-Antarctic Expedition launch a lifeboat from uninhabited Elephant Island in the Southern Ocean to organise a rescue for the crew of the sunken . 1918 – World War I: First tank-to-tank combat, during the second Battle of Villers-Bretonneux. Three British Mark IVs meet three German A7Vs. 1922 – The first segment of the Imperial Wireless Chain providing wireless telegraphy between Leafield in Oxfordshire, England, and Cairo, Egypt, comes into operation. 1924 – Thorvald Stauning becomes premier of Denmark (first term). 1926 – The Treaty of Berlin is signed. Germany and the Soviet Union each pledge neutrality in the event of an attack on the other by a third party for the next five years. 1932 – Benny Rothman leads the mass trespass of Kinder Scout, leading to substantial legal reforms in the United Kingdom. 1933 – Nazi Germany begins its persecution of Jehovah's Witnesses by shutting down the Watch Tower Society office in Magdeburg. 1944 – World War II: The SBS launches a raid against the garrison of Santorini in Greece. 1953 – Winston Churchill is knighted by Queen Elizabeth II. 1955 – The Bandung Conference ends: Twenty-nine non-aligned nations of Asia and Africa finish a meeting that condemns colonialism, racism, and the Cold War. 1957 – Suez Crisis: The Suez Canal is reopened following the introduction of UNEF peacekeepers to the region. 1963 – Marriage of Princess Alexandra of Kent to Angus Ogilvy at Westminster Abbey in London. 1965 – Civil war breaks out in the Dominican Republic when Colonel Francisco Caamaño overthrows the triumvirate that had been in power since the coup d'état against Juan Bosch. 1967 – Cosmonaut Vladimir Komarov dies in Soyuz 1 when its parachute fails to open. He is the first human to die during a space mission. 1967 – Vietnam War: American General William Westmoreland says in a news conference that the enemy had "gained support in the United States that gives him hope that he can win politically that which he cannot win militarily". 1970 – China launches Dong Fang Hong I, becoming the fifth nation to put an object into orbit using its own booster. 1970 – The Gambia becomes a republic within the Commonwealth of Nations, with Dawda Jawara as its first President. 1980 – Eight U.S. servicemen die in Operation Eagle Claw as they attempt to end the Iran hostage crisis. 1990 – STS-31: The Hubble Space Telescope is launched from the Space Shuttle Discovery. 1990 – Gruinard Island, Scotland, is officially declared free of the anthrax disease after 48 years of quarantine. 1993 – An IRA bomb devastates the Bishopsgate area of London. 1996 – In the United States, the Antiterrorism and Effective Death Penalty Act of 1996 is passed into law. 2004 – The United States lifts economic sanctions imposed on Libya 18 years previously, as a reward for its cooperation in eliminating weapons of mass destruction. 2005 – Cardinal Joseph Ratzinger is inaugurated as the 265th Pope of the Catholic Church taking the name Pope Benedict XVI. 2011 – WikiLeaks starts publishing the Guantanamo Bay files leak. 2013 – A building collapses near Dhaka, Bangladesh, killing 1,129 people and injuring 2,500 others. 2013 – Violence in Bachu County, Kashgar Prefecture, of China's Xinjiang results in death of 21 people. Births Pre-1600 1086 – Ramiro II of Aragon (d. 1157) 1492 – Sabina of Bavaria, Bavarian duchess and noblewoman (d. 1564) 1532 – Thomas Lucy, English politician (d. 1600) 1533 – William I of Orange, founding father of the Netherlands (d. 1584) 1538 – Guglielmo Gonzaga, Duke of Mantua (d. 1587) 1545 – Henry Wriothesley, 2nd Earl of Southampton, English Earl (d. 1581) 1562 – Xu Guangqi, Ming Dynasty Chinese politician, scholar and lay Catholic leader (d. 1633) 1581 – Vincent de Paul, French priest and saint (d. 1660) 1601–1900 1608 – Gaston, Duke of Orléans, third son of King Henry IV of France (d. 1660) 1620 – John Graunt, English demographer and statistician (d. 1674) 1706 – Giovanni Battista Martini, Italian pianist and composer (d. 1780) 1718 – Nathaniel Hone the Elder, Irish-English painter and educator (d. 1784) 1743 – Edmund Cartwright, English clergyman and engineer, invented the power loom (d. 1823) 1784 – Peter Vivian Daniel, American lawyer and jurist (d. 1860) 1815 – Anthony Trollope, English novelist, essayist, and short story writer (d. 1882) 1823 – Sebastián Lerdo de Tejada, Mexican politician, President of Mexico (d. 1889) 1845 – Carl Spitteler, Swiss poet and author, Nobel Prize laureate (d. 1924) 1856 – Philippe Pétain, French general and politician, 119th Prime Minister of France (d. 1951) 1860 – Queen Marau, last Queen of Tahiti (d.1935) 1862 – Tomitaro Makino, Japanese botanist (d. 1957) 1868 – Sandy Herd, Scottish golfer (d. 1944) 1876 – Erich Raeder, German admiral (d. 1960) 1878 – Jean Crotti, Swiss-French painter (d. 1958) 1879 – Susanna Bokoyni, Hungarian-American circus performer (d. 1984) 1880 – Gideon Sundback, Swedish-American engineer and businessman, developed the zipper (d. 1954) 1880 – Josef Müller, Croatian entomologist (d. 1964) 1882 – Hugh Dowding, 1st Baron Dowding, Scottish-English air marshal (d. 1970) 1885 – Thomas Cronan, American triple jumper (d. 1962) 1885 – Con Walsh, Irish-Canadian hammer thrower and footballer (d. 1961) 1887 – Denys Finch Hatton, English hunter (d. 1931) 1888 – Pe Maung Tin, Burma-based scholar and educator (d. 1973) 1889 – Stafford Cripps, English academic and politician, Chancellor of the Exchequer (d. 1952) 1889 – Lyubov Popova, Russian painter and academic (d. 1924) 1897 – Manuel Ávila Camacho, Mexican colonel and politician, 45th President of Mexico (d. 1955) 1897 – Benjamin Lee Whorf, American linguist, anthropologist, and engineer (d. 1941) 1899 – Oscar Zariski, Russian-American mathematician and academic (d. 1986) 1900 – Elizabeth Goudge, English author and educator (d. 1984) 1901–present 1903 – José Antonio Primo de Rivera, Spanish lawyer and politician, founded the Falange (d. 1936) 1904 – Willem de Kooning, Dutch-American painter and educator (d. 1997) 1905 – Al Bates, American long jumper (d. 1999) 1905 – Robert Penn Warren, American novelist, poet, and literary critic (d. 1989) 1906 – William Joyce, American-born Irish-British Nazi propaganda broadcaster (d. 1946) 1906 – Mimi Smith, English nurse (d. 1991) 1907 – Gabriel Figueroa, Mexican cinematographer (d. 1997) 1908 – Marceline Day, American actress (d. 2000) 1908 – Inga Gentzel, Swedish runner (d. 1991) 1908 – Józef Gosławski, Polish sculptor (d. 1963) 1912 – Ruth Osburn, American discus thrower (d. 1994) 1913 – Dieter Grau, German-American scientist and engineer (d. 2014) 1914 – William Castle, American director, producer, and screenwriter (d. 1977) 1914 – Phil Watson, Canadian ice hockey player and coach (d. 1991) 1914 – Justin Wilson, American chef and author (d. 2001) 1916 – Lou Thesz, American wrestler and trainer (d. 2002) 1919 – David Blackwell, American mathematician and academic (d. 2010) 1919 – Glafcos Clerides, Cypriot lawyer and politician, 4th President of Cyprus (d. 2013) 1920 – Gino Valenzano, Italian race car driver (d. 2011) 1922 – Marc-Adélard Tremblay, Canadian anthropologist and academic (d. 2014) 1923 – Gus Bodnar, Canadian ice hockey player and coach (d. 2005) 1923 – Doris Burn, American author and illustrator (d. 2011) 1924 – Clement Freud, German-English radio host, academic, and politician (d. 2009) 1924 – Ruth Kobart, American actress and singer (d. 2002) 1925 – Franco Leccese, Italian sprinter (d. 1992) 1926 – Marilyn Erskine, American actress 1926 – Thorbjörn Fälldin, Swedish farmer and politician, 27th Prime Minister of Sweden (d. 2016) 1927 – Josy Barthel, Luxembourgian runner and politician, Luxembourgian Minister for Energy (d. 1992) 1928 – Tommy Docherty, Scottish footballer and manager (d. 2020) 1928 – Johnny Griffin, American saxophonist (d. 2008) 1928 – Anahit Perikhanian, Russian-born Armenian Iranologist (d. 2012) 1929 – Dr. Rajkumar, Indian actor and singer (d. 2006) 1930 – Jerome Callet, American instrument designer, educator, and author (d. 2019) 1930 – Richard Donner, American actor, director, and producer (d. 2021) 1930 – José Sarney, Brazilian lawyer and politician, 31st President of Brazil 1931 – Abdelhamid Kermali, Algerian footballer and manager (d. 2013) 1931 – Bridget Riley, English painter and illustrator 1934 – Jayakanthan, Indian journalist and author (d. 2015) 1934 – Shirley MacLaine, American actress, singer, and dancer 1936 – David Crombie, Canadian educator and politician, 56th Mayor of Toronto 1936 – Jill Ireland, English actress (d. 1990) 1937 – Joe Henderson, American saxophonist and composer (d. 2001) 1940 – Sue Grafton, American author (d. 2017) 1941 – Richard Holbrooke, American journalist, banker, and diplomat, 22nd United States Ambassador to the United Nations (d. 2010) 1941 – John Williams, Australian-English guitarist and composer 1942 – Richard M. Daley, American lawyer and politician, 54th Mayor of Chicago 1942 – Barbra Streisand, American singer, actress, activist, and producer 1943 – Richard Sterban, American country and gospel bass singer 1943 – Gordon West, English footballer (d. 2012) 1944 – Peter Cresswell, English judge 1944 – Maarja Nummert, Estonian architect 1944 – Tony Visconti, American record producer, musician and singer 1945 – Doug Clifford, American drummer and songwriter 1946 – Doug Christie, Canadian lawyer and activist (d. 2013) 1947 – Josep Borrell, Spanish engineer and politician, 22nd President of the European Parliament 1947 – João Braz de Aviz, Brazilian cardinal 1947 – Claude Dubois, Canadian singer-songwriter and guitarist 1947 – Denise Kingsmill, Baroness Kingsmill, New Zealand-English lawyer and politician 1947 – Roger D. Kornberg, American biochemist and academic, Nobel Prize laureate 1948 – Paul Cellucci, American soldier and politician, 69th Governor of Massachusetts (d. 2013) 1948 – Eliana Gil, Ecuadorian-American psychiatrist, therapist, and author 1949 – Eddie Hart, American sprinter 1949 – Véronique Sanson, French singer-songwriter and producer 1950 – Rob Hyman, American singer-songwriter and musician 1951 – Ron Arad, Israeli architect and academic 1951 – Christian Bobin, French author and poet 1951 – Nigel Harrison, English bass player and songwriter 1951 – Enda Kenny, Irish educator and politician, 13th Taoiseach of Ireland 1952 – Jean Paul Gaultier, French fashion designer 1952 – Ralph Winter, American film producer 1953 – Eric Bogosian, American actor and writer 1954 – Mumia Abu-Jamal, American journalist, activist, and convicted murderer 1954 – Jack Blades, American singer-songwriter and bass player 1955 – Marion Caspers-Merk, German politician 1955 – John de Mol Jr., Dutch businessman, co-founded Endemol 1955 – Eamon Gilmore, Irish trade union leader and politician, 25th Tánaiste of Ireland 1955 – Margaret Moran, British politician and criminal 1955 – Guy Nève, Belgian race car driver (d. 1992) 1955 – Michael O'Keefe, American actor 1955 – Bill Osborne, New Zealand rugby player 1956 – James A. Winnefeld, Jr., American admiral 1957 – Nazir Ahmed, Baron Ahmed, Pakistani-English businessman and politician 1958 – Brian Paddick, English police officer and politician 1959 – Paula Yates, British-Australian television host and author (d. 2000) 1961 – Andrew Murrison, English physician and politician, Minister for International Security Strategy 1962 – Clemens Binninger, German politician 1962 – Stuart Pearce, English footballer, coach, and manager 1962 – Steve Roach, Australian rugby league player, coach, and sportscaster 1963 – Paula Frazer, American singer-songwriter and guitarist 1963 – Billy Gould, American bass player, songwriter, and producer 1963 – Mano Solo, French singer-songwriter, guitarist, and producer (d. 2010) 1964 – Helga Arendt, German sprinter (d. 2013) 1964 – Cedric the Entertainer, American comedian, actor, and producer 1964 – Djimon Hounsou, Beninese-American actor and producer 1964 – Witold Smorawiński, Polish guitarist, composer, and educator 1965 – Jeff Jackson, Canadian ice hockey player and manager 1966 – Pierre Brassard, Canadian comedian and actor 1966 – Alessandro Costacurta, Italian footballer, coach, and manager 1966 – David Usher, English-Canadian singer-songwriter 1967 – Dino Rađa, Croatian basketball player 1967 – Omar Vizquel, Venezuelan-American baseball player and coach 1968 – Aidan Gillen, Irish actor 1968 – Todd Jones, American baseball player 1968 – Roxanna Panufnik, English composer 1968 – Hashim Thaçi, Kosovan soldier and politician, 5th Prime Minister of Kosovo 1969 – Elias Atmatsidis, Greek footballer 1969 – Rory McCann, Scottish actor 1969 – Eilidh Whiteford, Scottish academic and politician 1970 – Damien Fleming, Australian cricketer, coach, and sportscaster 1971 – Kumar Dharmasena, Sri Lankan cricketer and umpire 1971 – Mauro Pawlowski, Belgian singer-songwriter and guitarist 1972 – Rab Douglas, Scottish footballer 1972 – Chipper Jones, American baseball player 1972 – Jure Košir, Slovenian skier and singer 1973 – Gabby Logan, English gymnast, television and radio host 1973 – Damon Lindelof, American screenwriter and producer 1973 – Brian Marshall, American bass player and songwriter 1973 – Eric Snow, American basketball player and coach 1973 – Sachin Tendulkar, Indian cricketer 1973 – Toomas Tohver, Estonian footballer 1973 – Lee Westwood, English golfer 1974 – Eric Kripke, American director, producer, and screenwriter 1974 – Stephen Wiltshire, English illustrator 1975 – Dejan Savić, Yugoslavian and Serbian water polo player 1976 – Steve Finnan, Irish international footballer 1976 – Frédéric Niemeyer, Canadian tennis player and coach 1977 – Carlos Beltrán, Puerto Rican-American baseball player 1977 – Diego Placente, Argentine footballer 1978 – Diego Quintana, Argentine footballer 1980 – Fernando Arce, Mexican footballer 1980 – Karen Asrian, Armenian chess player (d. 2008) 1981 – Taylor Dent, American tennis player 1981 – Yuko Nakanishi, Japanese swimmer 1982 – Kelly Clarkson, American singer-songwriter, producer, and actress 1982 – David Oliver, American hurdler 1982 – Simon Tischer, German volleyball player 1983 – Hanna Melnychenko, Ukrainian heptathlete 1985 – Mike Rodgers, American sprinter 1986 – Aaron Cunningham, American baseball player 1987 – Ben Howard, English singer-songwriter and guitarist 1987 – Kris Letang, Canadian ice hockey player 1987 – Rein Taaramäe, Estonian cyclist 1987 – Jan Vertonghen, Belgian international footballer 1987 – Varun Dhawan, Indian actor 1989 – Elīna Babkina, Latvian basketball player 1989 – David Boudia, American diver 1989 – Taja Mohorčič, Slovenian tennis player 1990 – Kim Tae-ri, South Korean actress 1990 – Jan Veselý, Czech basketball player 1991 – Sigrid Agren, French-Swedish model 1991 – Morgan Ciprès, French figure skater 1991 – Batuhan Karadeniz, Turkish footballer 1992 – Joe Keery, American actor 1992 – Laura Kenny, English cyclist 1993 – Ben Davies, Welsh international footballer 1994 – Jordan Fisher, American singer, dancer, and actor 1994 – Caspar Lee, British-South African Youtuber 1996 – Ashleigh Barty, Australian tennis player 1997 – Lydia Ko, New Zealand golfer 1997 – Veronika Kudermetova, Russian tennis player 1998 – Ryan Newman, American actress 1999 – Jerry Jeudy, American football player Deaths Pre-1600 624 – Mellitus, saint and archbishop of Canterbury 1149 – Petronille de Chemillé, abbess of Fontevrault 1288 – Gertrude of Austria (b. 1226) 1338 – Theodore I, Marquess of Montferrat (b. 1291) 1479 – Jorge Manrique, Spanish poet (b. 1440) 1513 – Şehzade Ahmet, Ottoman prince (b. 1465) 1601–1900 1617 – Concino Concini, Italian-French politician, Prime Minister of France (b. 1575) 1622 – Fidelis of Sigmaringen, German friar and saint (b. 1577) 1656 – Thomas Fincke, Danish mathematician and physicist (b. 1561) 1731 – Daniel Defoe, English journalist, novelist, and spy (b. 1660) 1748 – Anton thor Helle, German-Estonian clergyman and translator (b. 1683) 1779 – Eleazar Wheelock, American minister and academic, founded Dartmouth College (b. 1711) 1794 – Axel von Fersen the Elder, Swedish field marshal and politician (b. 1719) 1852 – Vasily Zhukovsky, Russian poet and translator (b. 1783) 1889 – Zulma Carraud, French author (b. 1796) 1891 – Helmuth von Moltke the Elder, German field marshal (b. 1800) 1901–present 1924 – G. Stanley Hall, American psychologist and academic (b. 1844) 1931 – David Kldiashvili, Georgian author and playwright (b. 1862) 1935 – Anastasios Papoulas, Greek general (b. 1857) 1938 – George Grey Barnard, American sculptor (b. 1863) 1939 – Louis Trousselier, French cyclist (b. 1881) 1941 – Karin Boye, Swedish author and poet (b. 1900) 1942 – Lucy Maud Montgomery, Canadian author (b. 1874) 1944 – Charles Jordan, American magician (b. 1888) 1945 – Ernst-Robert Grawitz, German physician (b. 1899) 1947 – Hans Biebow, German SS officer (b. 1902) 1947 – Willa Cather, American novelist, short story writer, and poet (b. 1873) 1948 – Jāzeps Vītols, Latvian composer (b. 1863) 1954 – Guy Mairesse, French race car driver (b. 1910) 1960 – Max von Laue, German physicist and academic, Nobel Prize laureate (b. 1879) 1961 – Lee Moran, American actor, director and screenwriter (b. 1888) 1962 – Milt Franklyn, American composer (b. 1897) 1964 – Gerhard Domagk, German pathologist and bacteriologist (b. 1895) 1965 – Louise Dresser, American actress (b. 1878) 1966 – Simon Chikovani, Georgian poet and author (b. 1902) 1967 – Vladimir Komarov, Russian pilot, engineer, and cosmonaut (b. 1927) 1967 – Robert Richards, Australian politician, 32nd Premier of South Australia (b. 1885) 1968 – Walter Tewksbury, American athlete (b. 1876) 1970 – Otis Spann, American singer and pianist (b. 1930) 1972 – Fernando Amorsolo, Filipino painter (b. 1892) 1974 – Bud Abbott, American comedian and producer (b. 1895) 1975 – Pete Ham, Welsh singer-songwriter and guitarist (b. 1947) 1976 – Mark Tobey, American-Swiss painter and educator (b. 1890) 1980 – Alejo Carpentier, Swiss-Cuban musicologist and author (b. 1904) 1982 – Ville Ritola, Finnish runner (b. 1896) 1983 – Erol Güngör, Turkish sociologist, psychologist, and academic (b. 1938) 1983 – Rolf Stommelen, German race car driver (b. 1943) 1984 – Rafael Pérez y Pérez, Spanish author (b. 1891) 1993 – Oliver Tambo, South African lawyer and activist (b. 1917) 1993 – Tran Duc Thao, Vietnamese philosopher and theorist (b. 1917) 1995 – Lodewijk Bruckman, Dutch painter (b. 1903) 1997 – Allan Francovich, American director and producer (b. 1941) 1997 – Pat Paulsen, American comedian and activist (b. 1927) 1997 – Eugene Stoner, American engineer, designed the AR-15 rifle (b. 1922) 2001 – Josef Peters, German race car driver (b. 1914) 2001 – Johnny Valentine, American wrestler (b. 1928) 2002 – Lucien Wercollier, Luxembourgian sculptor (b. 1908) 2003 – Nüzhet Gökdoğan, Turkish astronomer and mathematician (b. 1910) 2004 – José Giovanni, French-Swiss director and producer (b. 1923) 2004 – Estée Lauder, American businesswoman, co-founded Estée Lauder Companies (b. 1906) 2005 – Ezer Weizman, Israeli general and politician, 7th President of Israel (b. 1924) 2005 – Fei Xiaotong, Chinese sociologist and academic (b. 1910) 2006 – Brian Labone, English footballer (b. 1940) 2006 – Moshe Teitelbaum, Romanian-American rabbi and author (b. 1914) 2008 – Jimmy Giuffre, American clarinet player, and saxophonist, and composer (b. 1921) 2011 – Sathya Sai Baba, Indian guru and philanthropist (b. 1926) 2014 – Hans Hollein, Austrian architect, designed Haas House (b. 1934) 2014 – Sandy Jardine, Scottish footballer and manager (b. 1948) 2014 – Shobha Nagi Reddy, Indian politician (b. 1968) 2014 – Tadeusz Różewicz, Polish poet and playwright (b. 1921) 2015 – Władysław Bartoszewski, Polish journalist and politician, Polish Minister of Foreign Affairs (b. 1922) 2016 – Tommy Kono, American weightlifter and coach (b. 1930) 2017 – Robert Pirsig, American author and philosopher (b. 1928) Holidays and observances Armenian Genocide Remembrance Day (Armenia, France) Christian feast day: Benedict Menni Dermot of Armagh Dyfnan of Anglesey Ecgberht of Ripon Fidelis of Sigmaringen Gregory of Elvira Ivo of Ramsey Johann Walter (Lutheran) Mary of Clopas Mary Euphrasia Pelletier Mellitus Peter of Saint Joseph de Betancur Salome (disciple) Wilfrid (Church of England) William Firmatus April 24 (Eastern Orthodox liturgics) Concord Day (Niger) Democracy Day (Nepal) Earliest day on which Arbor Day can fall, while April 30 is the latest; celebrated on the last Friday in April. (United States) Earliest day on which Turkmen Racing Horse Festival can fall, while April 30 is the latest; celebrated on the last Sunday in April. (Turkmenistan) Fashion Revolution Day, and its related observances: Labour Safety Day (Bangladesh, proposed) National Panchayati Raj Day (India) Republic Day (The Gambia) World Day for Laboratory Animals References External links BBC: On This Day Historical Events on April 24 Today in Canadian History Days of the year April

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April 7

Events Pre-1600 451 – Attila the Hun sacks the town of Metz and attacks other cities in Gaul. 529 – First draft of the Corpus Juris Civilis (a fundamental work in jurisprudence) is issued by Eastern Roman Emperor Justinian I. 611 – Maya king Uneh Chan of Calakmul sacks rival city-state Palenque in southern Mexico. 1141 – Empress Matilda becomes the first female ruler of England, adopting the title 'Lady of the English'. 1348 – Holy Roman Emperor Charles IV charters Prague University. 1449 – Felix V abdicates his claim to the papacy, ending the reign of the final Antipope. 1521 – Ferdinand Magellan arrives at Cebu. 1541 – Francis Xavier leaves Lisbon on a mission to the Portuguese East Indies. 1601–1900 1724 – Premiere performance of Johann Sebastian Bach's St John Passion, BWV 245, at St. Nicholas Church, Leipzig. 1767 – End of Burmese–Siamese War (1765–67). 1788 – Settlers establish Marietta, Ohio, the first permanent settlement created by U.S. citizens in the recently organized Northwest Territory. 1795 – The French First Republic adopts the kilogram and gram as its primary unit of mass. 1798 – The Mississippi Territory is organized from disputed territory claimed by both the United States and the Spanish Empire. It is expanded in 1804 and again in 1812. 1805 – Lewis and Clark Expedition: The Corps of Discovery breaks camp among the Mandan tribe and resumes its journey West along the Missouri River. 1805 – German composer Ludwig van Beethoven premieres his Third Symphony, at the Theater an der Wien in Vienna. 1831 – Pedro II becomes Emperor of Brazil. 1862 – American Civil War: The Union's Army of the Tennessee and the Army of the Ohio defeat the Confederate Army of Mississippi near Shiloh, Tennessee. 1868 – Thomas D'Arcy McGee, one of the Canadian Fathers of Confederation, is assassinated by a Fenian activist. 1901–present 1906 – Mount Vesuvius erupts and devastates Naples. 1906 – The Algeciras Conference gives France and Spain control over Morocco. 1922 – Teapot Dome scandal: United States Secretary of the Interior Albert B. Fall leases federal petroleum reserves to private oil companies on excessively generous terms. 1926 – Violet Gibson attempts to assassinate Italian Prime Minister Benito Mussolini. 1927 – AT&T transmits the first long-distance public television broadcast (from Washington, D.C., to New York City, displaying the image of Commerce Secretary Herbert Hoover). 1933 – Prohibition in the United States is repealed for beer of no more than 3.2% alcohol by weight, eight months before the ratification of the Twenty-first Amendment to the United States Constitution. (Now celebrated as National Beer Day in the United States.) 1933 – Nazi Germany issues the Law for the Restoration of the Professional Civil Service banning Jews and political dissidents from civil service posts. 1939 – Benito Mussolini declares an Italian protectorate over Albania and forces King Zog I into exile. 1940 – Booker T. Washington becomes the first African American to be depicted on a United States postage stamp. 1943 – The Holocaust in Ukraine: In Terebovlia, Germans order 1,100 Jews to undress and march through the city to the nearby village of Plebanivka, where they are shot and buried in ditches. 1943 – Ioannis Rallis becomes collaborationist Prime Minister of Greece during the Axis Occupation. 1943 – The National Football League makes helmets mandatory. 1945 – World War II: The Imperial Japanese Navy battleship Yamato, one of the two largest ever constructed, is sunk by United States Navy aircraft during Operation Ten-Go. 1946 – The Soviet Union annexes East Prussia as the Kaliningrad Oblast of the Russian Soviet Federative Socialist Republic. 1948 – The World Health Organization is established by the United Nations. 1954 – United States President Dwight D. Eisenhower gives his "domino theory" speech during a news conference. 1955 – Winston Churchill resigns as Prime Minister of the United Kingdom amid indications of failing health. 1956 – Francoist Spain agrees to surrender its protectorate in Morocco. 1964 – IBM announces the System/360. 1965 – Representatives of the National Congress of American Indians testify before members of the US Senate in Washington, D.C. against the termination of the Colville tribe. 1968 – Two-time Formula One British champion Jim Clark dies in an accident during a Formula Two race in Hockenheim. 1969 – The Internet's symbolic birth date: Publication of RFC 1. 1971 – Vietnam War: President Richard Nixon announces his decision to quicken the pace of Vietnamization. 1972 – Vietnam War: Communist forces overrun the South Vietnamese town of Loc Ninh. 1976 – Member of Parliament and suspected spy John Stonehouse resigns from the Labour Party after being arrested for faking his own death. 1977 – German Federal prosecutor Siegfried Buback and his driver are shot by two Red Army Faction members while waiting at a red light. 1978 – Development of the neutron bomb is canceled by President Jimmy Carter. 1980 – During the Iran hostage crisis, the United States severs relations with Iran. 1982 – Iranian Foreign Affairs Minister Sadegh Ghotbzadeh is arrested. 1983 – During STS-6, astronauts Story Musgrave and Don Peterson perform the first Space Shuttle spacewalk. 1988 – Soviet Defense Minister Dmitry Yazov orders the Soviet withdrawal from Afghanistan. 1989 – Soviet submarine Komsomolets sinks in the Barents Sea off the coast of Norway, killing 42 sailors. 1990 – A fire breaks out on the passenger ferry Scandinavian Star, killing 159 people. 1990 – John Poindexter is convicted for his role in the Iran–Contra affair. 1994 – Rwandan genocide: Massacres of Tutsis begin in Kigali, Rwanda, and soldiers kill the civilian Prime Minister Agathe Uwilingiyimana. 1994 – Auburn Calloway attempts to destroy Federal Express Flight 705 in order to allow his family to benefit from his life insurance policy. 1995 – First Chechen War: Russian paramilitary troops begin a massacre of civilians in Samashki, Chechnya. 2001 – NASA launches the 2001 Mars Odyssey orbiter. 2003 – Iraq War: U.S. troops capture Baghdad; Saddam Hussein's Ba'athist regime falls two days later. 2009 – Former Peruvian President Alberto Fujimori is sentenced to 25 years in prison for ordering killings and kidnappings by security forces. 2009 – Mass protests begin across Moldova under the belief that results from the parliamentary election are fraudulent. 2011 – The Israel Defense Forces use their Iron Dome missile system to successfully intercept a BM-21 Grad launched from Gaza, marking the first short-range missile intercept ever. 2017 – A man deliberately drives a hijacked truck into a crowd of people in Stockholm, Sweden, killing five people and injuring fifteen others. 2017 – U.S. President Donald Trump orders the 2017 Shayrat missile strike against Syria in retaliation for the Khan Shaykhun chemical attack. 2018 – Syria launches the Douma chemical attack during the Eastern Ghouta offensive of the Syrian Civil War. 2018 – Former Brazilian president, Luiz Inácio Lula da Silva, is arrested for corruption by determination of Judge Sérgio Moro, from the “Car-Wash Operation”. Lula stayed imprisoned for 580 days, after being released by the Brazilian Supreme Court. 2020 – COVID-19 pandemic: China ends its lockdown in Wuhan. 2020 – COVID-19 pandemic: Acting Secretary of the Navy Thomas Modly resigns for his handling of the COVID-19 pandemic on USS Theodore Roosevelt and the dismissal of Brett Crozier. 2020 – 2020 United States presidential election: The 2020 Wisconsin Democratic presidential primary occurs, and is won by Joe Biden. 2021 – COVID-19 pandemic: The Centers for Disease Control and Prevention announces that the SARS-CoV-2 Alpha variant has become the dominant strain of COVID-19 in the United States. Births Pre-1600 1206 – Otto II Wittelsbach, Duke of Bavaria (d. 1253) 1330 – John, 3rd Earl of Kent, English nobleman (d. 1352) 1470 – Edward Stafford, 2nd Earl of Wiltshire (d. 1498) 1506 – Francis Xavier, Spanish missionary and saint, co-founded the Society of Jesus (d. 1552) 1539 – Tobias Stimmer, Swiss painter and illustrator (d. 1584) 1601–1900 1613 – Gerrit Dou, Dutch painter (d. 1675) 1644 – François de Neufville, duc de Villeroy, French general (d. 1730) 1648 – John Sheffield, 1st Duke of Buckingham and Normanby, English poet and politician, Lord President of the Council (d. 1721) 1652 – Pope Clement XII (d. 1740) 1713 – Nicola Sala, Italian composer and theorist (d. 1801) 1718 – Hugh Blair, Scottish minister and author (d. 1800) 1727 – Michel Adanson, French botanist, entomologist, and mycologist (d. 1806) 1763 – Domenico Dragonetti, Italian bassist and composer (d. 1846) 1770 – William Wordsworth, English poet (d. 1850) 1772 – Charles Fourier, French philosopher (d. 1837) 1780 – William Ellery Channing, American preacher and theologian (d. 1842) 1803 – James Curtiss, American journalist and politician, 11th Mayor of Chicago (d. 1859) 1803 – Flora Tristan, French author and activist (d. 1844) 1811 – Hasan Tahsini, Albanian astronomer, mathematician, and philosopher (d. 1881) 1817 – Francesco Selmi, Italian chemist and patriot (d. 1881) 1848 – Randall Davidson, Scottish archbishop (d. 1930) 1859 – Walter Camp, American football player and coach (d. 1925) 1860 – Will Keith Kellogg, American businessman, founded the Kellogg Company (d. 1951) 1867 – Holger Pedersen, Danish linguist and academic (d. 1953) 1870 – Gustav Landauer, German theorist and activist (d. 1919) 1871 – Epifanio de los Santos, Filipino jurist, historian, and scholar (d. 1927) 1873 – John McGraw, American baseball player and manager (d. 1934) 1874 – Frederick Carl Frieseke, German-American painter (d. 1939) 1876 – Fay Moulton, American sprinter, football player, coach, and lawyer (d. 1945) 1882 – Bert Ironmonger, Australian cricketer (d. 1971) 1882 – Kurt von Schleicher, German general and politician, 23rd Chancellor of Germany (d. 1934) 1883 – Gino Severini, Italian-French painter and author (d. 1966) 1884 – Clement Smoot, American golfer (d. 1963) 1886 – Ed Lafitte, American baseball player and soldier (d. 1971) 1889 – Gabriela Mistral, Chilean poet and educator, Nobel Prize laureate (d. 1957) 1890 – Paul Berth, Danish footballer (d. 1969) 1890 – Victoria Ocampo. Argentine writer (d. 1979) 1890 – Marjory Stoneman Douglas, American journalist and activist (d. 1998) 1891 – Ole Kirk Christiansen, Danish businessman, founded the Lego Group (d. 1958) 1892 – Julius Hirsch, German footballer (d. 1945) 1893 – Allen Dulles, American lawyer and diplomat, 5th Director of Central Intelligence (d. 1969) 1895 – John Bernard Flannagan, American soldier and sculptor (d. 1942) 1895 – Margarete Schön, German actress (d. 1985) 1896 – Frits Peutz, Dutch architect, designed the Glaspaleis (d. 1974) 1897 – Erich Löwenhardt, Polish-German lieutenant and pilot (d. 1918) 1897 – Walter Winchell, American journalist and radio host (d. 1972) 1899 – Robert Casadesus, French pianist and composer (d. 1972) 1900 – Adolf Dymsza, Polish actor (d. 1975) 1900 – Tebbs Lloyd Johnson, English race walker (d. 1984) 1901–present 1902 – Eduard Eelma, Estonian footballer (d. 1941) 1903 – M. Balasundaram, Sri Lankan lawyer and politician (d. 1965) 1903 – Edwin T. Layton, American admiral (d. 1984) 1904 – Roland Wilson, Australian economist and statistician (d. 1996) 1908 – Percy Faith, Canadian composer, conductor, and bandleader (d. 1976) 1908 – Pete Zaremba, American hammer thrower (d. 1994) 1909 – Robert Charroux, French author and critic (d. 1978) 1913 – Louise Currie, American actress (d. 2013) 1913 – Charles Vanik, American soldier, judge, and politician (d. 2007) 1914 – Ralph Flanagan, American pianist, composer, and conductor (d. 1995) 1915 – Stanley Adams, American actor and screenwriter (d. 1977) 1915 – Billie Holiday, American singer-songwriter and actress (d. 1959) 1915 – Henry Kuttner, American author (d. 1958) 1916 – Anthony Caruso, American actor (d. 2003) 1917 – R. G. Armstrong, American actor and playwright (d. 2012) 1918 – Bobby Doerr, American baseball player and coach (d. 2017) 1919 – Roger Lemelin, Canadian author and screenwriter (d. 1992) 1919 – Edoardo Mangiarotti, Italian fencer (d. 2012) 1920 – Ravi Shankar, Indian-American sitar player and composer (d. 2012) 1921 – Feza Gürsey, Turkish mathematician and physicist (d. 1992) 1922 – Mongo Santamaría, Cuban-American drummer (d. 2003) 1924 – Johannes Mario Simmel, Austrian-English author and screenwriter (d. 2009) 1925 – Chaturanan Mishra, Indian trade union leader and politician (d. 2011) 1925 – Jan van Roessel, Dutch footballer (d. 2011) 1927 – Babatunde Olatunji, Nigerian-American drummer, educator, and activist (d. 2003) 1927 – Leonid Shcherbakov, Russian triple jumper 1928 – James Garner, American actor, singer, and producer (d. 2014) 1928 – Alan J. Pakula, American director, producer, and screenwriter (d. 1998) 1928 – James White, Northern Irish author and educator (d. 1999) 1929 – Bob Denard, French soldier (d. 2007) 1929 – Joe Gallo, American gangster (d. 1972) 1930 – Jane Priestman, English interior designer (d. 2021) 1930 – Yves Rocher, French businessman, founded the Yves Rocher Company (d. 2009) 1930 – Andrew Sachs, German-English actor and screenwriter (d. 2016) 1930 – Roger Vergé, French chef and restaurateur (d. 2015) 1931 – Donald Barthelme, American short story writer and novelist (d. 1989) 1931 – Daniel Ellsberg, American activist and author 1932 – Cal Smith, American singer and guitarist (d. 2013) 1933 – Wayne Rogers, American actor, investor, and producer (d. 2015) 1933 – Sakıp Sabancı, Turkish businessman and philanthropist (d. 2004) 1934 – Ian Richardson, Scottish-English actor (d. 2007) 1935 – Bobby Bare, American singer-songwriter and guitarist 1935 – Hodding Carter III, American journalist and politician, Assistant Secretary of State for Public Affairs 1937 – Charlie Thomas, American singer 1938 – Jerry Brown, American lawyer and politician, 34th and 39th Governor of California 1938 – Spencer Dryden, American drummer (d. 2005) 1938 – Freddie Hubbard, American trumpet player and composer (d. 2008) 1938 – Iris Johansen, American author 1939 – Francis Ford Coppola, American director, producer, and screenwriter 1939 – David Frost, English journalist and game show host (d. 2013) 1939 – Gary Kellgren, American record producer, co-founded Record Plant (d. 1977) 1939 – Brett Whiteley, Australian painter (d. 1992) 1940 – Marju Lauristin, Estonian academic and politician, 1st Estonian Minister of Social Affairs 1941 – James Di Pasquale, American composer 1941 – Peter Fluck, English puppet maker and illustrator 1941 – Cornelia Frances, English-Australian actress (d. 2018) 1941 – Gorden Kaye, English actor (d. 2017) 1942 – Jeetendra, Indian actor, TV and film producer 1943 – Mick Abrahams, English singer-songwriter and guitarist 1943 – Dennis Amiss, English cricketer and manager 1944 – Shel Bachrach, American insurance broker, investor, businessman and philanthropist 1944 – Warner Fusselle, American sportscaster (d. 2012) 1944 – Oshik Levi, Israeli singer and actor 1944 – Julia Phillips, American film producer and author (d. 2002) 1944 – Gerhard Schröder, German lawyer and politician, 7th Chancellor of Germany 1944 – Bill Stoneman, American baseball player and manager 1945 – Megas, Icelandic singer-songwriter 1945 – Gerry Cottle, English circus owner (d. 2021) 1945 – Marilyn Friedman, American philosopher and academic 1945 – Martyn Lewis, Welsh journalist and author 1945 – Joël Robuchon, French chef and author (d. 2018) 1945 – Werner Schroeter, German director and screenwriter (d. 2010) 1945 – Hans van Hemert, Dutch songwriter and producer 1946 – Zaid Abdul-Aziz, American basketball player 1946 – Colette Besson, French runner and educator (d. 2005) 1946 – Herménégilde Chiasson, Canadian poet, playwright, and politician, 29th Lieutenant Governor of New Brunswick 1946 – Dimitrij Rupel, Slovenian politician and diplomate 1946 – Stan Winston, American special effects designer and makeup artist (d. 2008) 1947 – Patricia Bennett, American singer 1947 – Florian Schneider, German singer and drummer (d. 2020) 1947 – Michèle Torr, French singer and author 1948 – John Oates, American singer-songwriter guitarist, and producer 1948 – Arnie Robinson, American athlete (d. 2020) 1949 – Mitch Daniels, American academic and politician, 49th Governor of Indiana 1950 – Brian J. Doyle, American press secretary 1950 – Neil Folberg, American-Israeli photographer 1951 – Bruce Gary, American drummer (d. 2006) 1951 – Janis Ian, American singer-songwriter and guitarist 1952 – David Baulcombe, English geneticist and academic 1952 – Jane Frederick, American hurdler and heptathlete 1952 – Gilles Valiquette, Canadian actor, singer, and producer 1952 – Dennis Hayden, American actor 1953 – Santa Barraza, American mixed media artist 1953 – Douglas Kell, English biochemist and academic 1954 – Jackie Chan, Hong Kong martial artist, actor, stuntman, director, producer, and screenwriter 1954 – Tony Dorsett, American football player 1955 – Tim Cochran, American mathematician and academic (d. 2014) 1955 – Gregg Jarrett, American lawyer and journalist 1956 – Annika Billström, Swedish businesswoman and politician, 16th Mayor of Stockholm 1956 – Christopher Darden, American lawyer and author 1956 – Georg Werthner, Austrian decathlete 1957 – Kim Kap-soo, South Korean actor 1957 – Thelma Walker, British politician 1958 – Brian Haner, American singer-songwriter and guitarist 1958 – Hindrek Kesler, Estonian architect 1960 – Buster Douglas, American boxer and actor 1960 – Sandy Powell, English costume designer 1961 – Thurl Bailey, American basketball player and actor 1961 – Pascal Olmeta, French footballer 1961 – Brigitte van der Burg, Tanzanian-Dutch geographer and politician 1962 – Jon Cruddas, English lawyer and politician 1962 – Andrew Hampsten, American cyclist 1963 – Jaime de Marichalar, Spanish businessman 1963 – Nick Herbert, English businessman and politician, Minister for Policing 1963 – Dave Johnson, American decathlete and educator 1964 – Jace Alexander, American actor and director 1964 – Russell Crowe, New Zealand-Australian actor 1964 – Steve Graves, Canadian ice hockey player 1965 – Bill Bellamy, American comedian, actor, and producer 1965 – Rozalie Hirs, Dutch composer and poet 1965 – Alison Lapper, English painter and photographer 1965 – Nenad Vučinić, Serbian-New Zealand basketball player and coach 1966 – Richard Gomez, Filipino actor and politician 1966 – Zvika Hadar, Israeli entertainer 1966 – Béla Mavrák, Hungarian tenor singer 1966 – Gary Wilkinson, English snooker player 1967 – Artemis Gounaki, Greek-German singer-songwriter 1967 – Bodo Illgner, German footballer 1967 – Simone Schilder, Dutch tennis player 1968 – Duncan Armstrong, Australian swimmer and sportscaster 1968 – Jennifer Lynch, American actress, director, producer, and screenwriter 1968 – Jože Možina, Slovenian historian, sociologist and journalist 1968 – Vasiliy Sokov, Russian triple jumper 1969 – Ricky Watters, American football player 1970 – Leif Ove Andsnes, Norwegian pianist and educator 1971 – Guillaume Depardieu, French actor (d. 2008) 1971 – Victor Kraatz, German-Canadian figure skater 1972 – Tim Peake, British astronaut 1973 – Marco Delvecchio, Italian footballer 1973 – Jeanine Hennis-Plasschaert, Dutch lawyer and politician, Dutch Minister of Defence 1973 – Carole Montillet, French skier 1973 – Christian O'Connell, British radio DJ and presenter 1973 – Brett Tomko, American baseball player 1975 – Karin Dreijer Andersson, Swedish singer-songwriter and producer 1975 – Ronde Barber, American football player and sportscaster 1975 – Tiki Barber, American football player and journalist 1975 – Ronnie Belliard, American baseball player 1975 – John Cooper, American singer-songwriter and bass player 1975 – Simon Woolford, Australian rugby league player 1976 – Kevin Alejandro, American actor and producer 1976 – Martin Buß, German high jumper 1976 – Jessica Lee, English lawyer and politician 1976 – Aaron Lohr, American actor 1976 – Barbara Jane Reams, American actress 1976 – Gang Qiang, Chinese anchor 1978 – Jo Appleby, English soprano 1978 – Duncan James, English singer-songwriter and actor 1978 – Lilia Osterloh, American tennis player 1979 – Adrián Beltré, Dominican-American baseball player 1979 – Patrick Crayton, American football player 1979 – Pascal Dupuis, Canadian ice hockey player 1979 – Danny Sandoval, Venezuelan-American baseball player 1980 – Dragan Bogavac, Montenegrin footballer 1980 – Bruno Covas, Brazilian lawyer, politician (d. 2021) 1980 – Tetsuji Tamayama, Japanese actor 1981 – Hitoe Arakaki, Japanese singer 1981 – Kazuki Watanabe, Japanese songwriter and guitarist (d. 2000) 1981 – Vanessa Olivarez, American singer-songwriter, and actress 1981 – Suzann Pettersen, Norwegian golfer 1982 – Silvana Arias, Peruvian actress 1982 – Sonjay Dutt, American wrestler 1982 – Kelli Young, English singer 1983 – Hamish Davidson, Australian musician 1983 – Franck Ribéry, French footballer 1983 – Jon Stead, English footballer 1983 – Jakub Smrž, Czech motorcycle rider 1983 – Janar Talts, Estonian basketball player 1984 – Hiroko Shimabukuro, Japanese singer 1985 – KC Concepcion, Filipino actress and singer 1985 – Humza Yousaf, Scottish politician 1986 – Brooke Brodack, American comedian 1986 – Jack Duarte, Mexican actor, singer, and guitarist 1986 – Andi Fraggs, English singer-songwriter and producer 1986 – Christian Fuchs, Austrian footballer 1987 – Martín Cáceres, Uruguayan footballer 1987 – Eelco Sintnicolaas, Dutch decathlete 1987 – Jamar Smith, American football player 1988 – Antonio Piccolo, Italian footballer 1988 – Ed Speleers, English actor and producer 1989 – Alexa Demara, American actress, model and writer 1989 – Franco Di Santo, Argentinian footballer 1989 – Mitchell Pearce, Australian rugby league player 1989 – Teddy Riner, French judoka 1990 – Nickel Ashmeade, Jamaican sprinter 1990 – Anna Bogomazova, Russian-American kick-boxer, martial artist, and wrestler 1990 – Sorana Cîrstea, Romanian tennis player 1990 – Trent Cotchin, Australian footballer 1991 – Luka Milivojević, Serbian footballer 1991 – Anne-Marie, English singer-songwriter 1992 – Andreea Acatrinei, Romanian gymnast 1992 – Guilherme Negueba, Brazilian footballer 1993 – Ichinojō Takashi, Mongolian sumo wrestler 1994 – Johanna Allik, Estonian figure skater 1994 – Aaron Gray, Australian rugby league player 1996 – Emerson Hyndman, American international soccer player 1997 – Rafaela Gómez, Ecuadorian tennis player Deaths Pre-1600 AD 30 – Jesus Christ (possible date of the crucifixion) (b. circa 4 BC) 821 – George the Standard-Bearer, archbishop of Mytilene (b. c. 776) 924 – Berengar I of Italy (b. 845) 1201 – Baha al-Din Qaraqush, regent of Egypt and builder of the Cairo Citadel 1206 – Frederick I, Duke of Lorraine 1340 – Bolesław Jerzy II of Mazovia (b. 1308) 1498 – Charles VIII of France (b. 1470) 1499 – Galeotto I Pico, Duke of Mirandola (b. 1442) 1501 – Minkhaung II, king of Ava (b. 1446) 1601–1900 1606 – Edward Oldcorne, English martyr (b. 1561) 1614 – El Greco, Greek-Spanish painter and sculptor (b. 1541) 1638 – Shimazu Tadatsune, Japanese daimyō (b. 1576) 1651 – Lennart Torstensson, Swedish field marshal and engineer (b. 1603) 1658 – Juan Eusebio Nieremberg, Spanish mystic and philosopher (b. 1595) 1661 – Sir William Brereton, 1st Baronet, English commander and politician (b. 1604) 1663 – Francis Cooke, English-American settler (b. 1583) 1668 – William Davenant, English poet and playwright (b. 1606) 1719 – Jean-Baptiste de La Salle, French priest and saint, founded the Institute of the Brothers of the Christian Schools (b. 1651) 1739 – Dick Turpin, English criminal (b. 1705) 1747 – Leopold I, Prince of Anhalt-Dessau (b. 1676) 1761 – Thomas Bayes, English minister and mathematician (b. 1701) 1766 – Tiberius Hemsterhuis, Dutch philologist and critic (b. 1685) 1767 – Franz Sparry, Austrian composer and director (b. 1715) 1779 – Martha Ray, English singer (b.1746) 1782 – Taksin, Thai king (b. 1734) 1789 – Abdul Hamid I, Ottoman sultan (b. 1725) 1789 – Petrus Camper, Dutch physician, anatomist, and physiologist (b. 1722) 1801 – Noël François de Wailly, French lexicographer and author (b. 1724) 1804 – Toussaint Louverture, Haitian general (b. 1743) 1811 – Garsevan Chavchavadze, Georgian diplomat and politician (b. 1757) 1823 – Jacques Charles, French physicist and mathematician (b. 1746) 1833 – Antoni Radziwiłł, Lithuanian composer and politician (b. 1775) 1836 – William Godwin, English journalist and author (b. 1756) 1849 – Pedro Ignacio de Castro Barros, Argentinian priest and politician (b. 1777) 1850 – William Lisle Bowles, English poet and critic (b. 1762) 1858 – Anton Diabelli, Austrian composer and publisher (b. 1781) 1868 – Thomas D'Arcy McGee, Irish-Canadian journalist, activist, and politician (b. 1825) 1879 – Begum Hazrat Mahal, Begum of Awadh, was the second wife of Nawab Wajid Ali Shah (b. 1820) 1884 – Maria Doolaeghe, Flemish novelist (b. 1803) 1885 – Karl Theodor Ernst von Siebold, German physiologist and zoologist (b. 1804) 1889 – Youssef Bey Karam, Lebanese soldier and politician (b. 1823) 1889 – Sebastián Lerdo de Tejada, Mexican politician and president, 1872-1876 (b. 1823) 1891 – P. T. Barnum, American businessman and politician, co-founded The Barnum & Bailey Circus (b. 1810) 1901–present 1917 – Spyridon Samaras, Greek composer and playwright (b. 1861) 1918 – David Kolehmainen, Finnish wrestler (b. 1885) 1918 – George E. Ohr, American potter (b. 1857) 1920 – Karl Binding, German lawyer and jurist (b. 1841) 1922 – James McGowen, Australian politician, 18th Premier of New South Wales (b. 1855) 1928 – Alexander Bogdanov, Russian physician, philosopher, and author (b. 1873) 1932 – Grigore Constantinescu, Romanian priest and journalist (b. 1875) 1938 – Suzanne Valadon, French painter (b. 1865) 1939 – Joseph Lyons, Australian educator and politician, 10th Prime Minister of Australia (b. 1879) 1943 – Jovan Dučić, Serbian-American poet and diplomat (b. 1871) 1943 – Alexandre Millerand, French lawyer and politician, 12th President of France (b. 1859) 1947 – Henry Ford, American engineer and businessman, founded the Ford Motor Company (b. 1863) 1949 – John Gourlay, Canadian soccer player (b. 1872) 1950 – Walter Huston, Canadian-American actor and singer (b. 1883) 1955 – Theda Bara, American actress (b. 1885) 1956 – Fred Appleby, English runner (b. 1879) 1960 – Henri Guisan, Swiss general (b. 1874) 1965 – Roger Leger, Canadian ice hockey player (b. 1919) 1966 – Walt Hansgen, American race car driver (b. 1919) 1968 – Edwin Baker, Canadian co-founder of the Canadian National Institute for the Blind (CNIB) (b. 1893) 1968 – Jim Clark, Scottish race car driver (b. 1936) 1972 – Joe Gallo, American gangster (b. 1929) 1972 – Abeid Karume, Tanzanian politician, 1st President of Zanzibar (b. 1905) 1981 – Kit Lambert, English record producer and manager (b. 1935) 1981 – Norman Taurog, American director and screenwriter (b. 1899) 1982 – Harald Ertl, Austrian race car driver and journalist (b. 1948) 1984 – Frank Church, American soldier, lawyer, and politician (b. 1924) 1985 – Carl Schmitt, German philosopher and jurist (b. 1888) 1986 – Leonid Kantorovich, Russian mathematician and economist (b. 1912) 1990 – Ronald Evans, American captain, engineer, and astronaut (b. 1933) 1991 – Memduh Ünlütürk, Turkish general (b. 1913) 1992 – Ace Bailey, Canadian ice hockey player and coach (b. 1903) 1992 – Antonis Tritsis, Greek high jumper and politician, 71st Mayor of Athens (b. 1937) 1994 – Lee Brilleaux, English singer-songwriter and guitarist (b. 1952) 1994 – Albert Guðmundsson, Icelandic footballer, manager, and politician (b. 1923) 1994 – Golo Mann, German historian and author (b. 1909) 1994 – Agathe Uwilingiyimana, Rwandan chemist, academic, and politician, Prime Minister of Rwanda (b. 1953) 1995 – Philip Jebb, English architect and politician (b. 1927) 1997 – Luis Aloma, Cuban-American baseball player (b. 1923) 1997 – Georgy Shonin, Ukrainian-Russian general, pilot, and astronaut (b. 1935) 1998 – Alex Schomburg, Puerto Rican-American painter and illustrator (b. 1905) 1999 – Heinz Lehmann, German-Canadian psychiatrist and academic (b. 1911) 2001 – David Graf, American actor (b. 1950) 2001 – Beatrice Straight, American actress (b. 1914) 2002 – John Agar, American actor (b. 1921) 2003 – Cecile de Brunhoff, French pianist and author (b. 1903) 2003 – David Greene, English-American actor, director, producer, and screenwriter (b. 1921) 2004 – Victor Argo, American actor (b. 1934) 2004 – Konstantinos Kallias, Greek politician (b. 1901) 2005 – Cliff Allison, English race car driver (b. 1932) 2005 – Grigoris Bithikotsis, Greek singer-songwriter (b. 1922) 2005 – Bob Kennedy, American baseball player, coach, and manager (b. 1920) 2005 – Melih Kibar, Turkish composer and educator (b. 1951) 2007 – Johnny Hart, American author and illustrator (b. 1931) 2007 – Barry Nelson, American actor (b. 1917) 2008 – Ludu Daw Amar, Burmese journalist and author (b. 1915) 2009 – Dave Arneson, American game designer, co-created Dungeons & Dragons (b. 1947) 2011 – Pierre Gauvreau, Canadian painter (b. 1922) 2012 – Steven Kanumba, Tanzanian actor and director (b. 1984) 2012 – Satsue Mito, Japanese zoologist and academic (b. 1914) 2012 – Ignatius Moses I Daoud, Syrian cardinal (b. 1930) 2012 – David E. Pergrin, American colonel and engineer (b. 1917) 2012 – Bashir Ahmed Qureshi, Pakistani politician (b. 1959) 2012 – Mike Wallace, American television news journalist (b. 1918) 2013 – Marty Blake, American businessman (b. 1927) 2013 – Les Blank, American director and producer (b. 1935) 2013 – Andy Johns, English-American record producer (b. 1950) 2013 – Lilly Pulitzer, American fashion designer (b. 1931) 2013 – Irma Ravinale, Italian composer and educator (b. 1937) 2013 – Mickey Rose, American screenwriter (b. 1935) 2013 – Carl Williams, American boxer (b. 1959) 2014 – George Dureau, American painter and photographer (b. 1930) 2014 – James Alexander Green, American-English mathematician and academic (b. 1926) 2014 – V. K. Murthy, Indian cinematographer (b. 1923) 2014 – Zeituni Onyango, Kenyan-American computer programmer (b. 1952) 2014 – John Shirley-Quirk, English opera singer (b. 1931) 2014 – George Shuffler, American guitarist (b. 1925) 2014 – Josep Maria Subirachs, Spanish sculptor and painter (b. 1927) 2014 – Royce Waltman, American basketball player and coach (b. 1942) 2015 – Tim Babcock, American soldier and politician, 16th Governor of Montana (b. 1919) 2015 – José Capellán, Dominican-American baseball player (b. 1981) 2015 – Stan Freberg, American puppeteer, voice actor, and singer (b. 1926) 2015 – Richard Henyekane, South African footballer (b. 1983) 2015 – Geoffrey Lewis, American actor (b. 1935) 2016 – Blackjack Mulligan, American professional wrestler (b. 1942) 2019 – Seymour Cassel, American actor (b. 1935) 2020 – John Prine, American country folk singer-songwriter (b. 1946) 2020 – Herb Stempel, American television personality (b. 1926) 2021 – Tommy Raudonikis, Australian rugby league player and coach (b. 1950) Holidays and observances Christian feast days: Aibert of Crespin Blessed Alexander Rawlins Blessed Edward Oldcorne and Blessed Ralph Ashley Blessed Notker the Stammerer Brynach Hegesippus Henry Walpole Hermann Joseph Jean-Baptiste de La Salle Patriarch Tikhon of Moscow (Eastern Orthodox Church, Episcopal Church (USA)) April 7 (Eastern Orthodox liturgics) Flag Day (Slovenia) Genocide Memorial Day (Rwanda), and its related observance: International Day of Reflection on the 1994 Rwanda Genocide (United Nations) Motherhood and Beauty Day (Armenia) National Beer Day (United States) Sheikh Abeid Amani Karume Day (Tanzania) Women's Day (Mozambique) World Health Day (International observance) References External links BBC: On This Day Historical Events on April 7 Today in Canadian History Days of the year April

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

Andalusia

Andalusia (, ; ) is the southernmost autonomous community in Peninsular Spain. It is the most populous and the second largest autonomous community in the country. It is officially recognised as a "historical nationality". The territory is divided into eight provinces: Almería, Cádiz, Córdoba, Granada, Huelva, Jaén, Málaga, and Seville. Its capital city is Seville. The seat of the High Court of Justice of Andalusia is located in the city of Granada. Andalusia is located in the south of the Iberian peninsula, in southwestern Europe, immediately south of the autonomous communities of Extremadura and Castilla-La Mancha; west of the autonomous community of Murcia and the Mediterranean Sea; east of Portugal and the Atlantic Ocean; and north of the Mediterranean Sea and the Strait of Gibraltar. Andalusia is the only European region with both Mediterranean and Atlantic coastlines. The small British overseas territory of Gibraltar shares a land border with the Andalusian portion of the province of Cádiz at the eastern end of the Strait of Gibraltar. The main mountain ranges of Andalusia are the Sierra Morena and the Baetic System, consisting of the Subbaetic and Penibaetic Mountains, separated by the Intrabaetic Basin. In the north, the Sierra Morena separates Andalusia from the plains of Extremadura and Castile–La Mancha on Spain's Meseta Central. To the south the geographic subregion of lies mostly within the Baetic System, while is in the Baetic Depression of the valley of the Guadalquivir. The name "Andalusia" is derived from the Arabic word Al-Andalus (الأندلس). The toponym al-Andalus is first attested by inscriptions on coins minted in 716 by the new Muslim government of Iberia. These coins, called dinars, were inscribed in both Latin and Arabic. The etymology of the name "al-Andalus" has traditionally been derived from the name of the Vandals. Since the 1980s, a number of proposals have challenged this contention. Halm, in 1989, derived the name from a Gothic term, *, and in 2002, Bossong suggested its derivation from a pre-Roman substrate. The region's history and culture have been influenced by the Tartessos, Iberians, Phoenicians, Carthaginians, Greeks, Romans, Vandals, Visigoths, Byzantines, Berbers of North Africa, Jews, Romani, Arab Umayyads, and Moors. During the Islamic Golden Age, Cordoba surpassed Constantinople to be Europe's biggest city, and became the capital of Al Andalus and a prominent center of education and learning in the world, producing numerous philosophers and scientists. The Castilian and other Christian North Iberian nationalities reconquered and settled the area in the latter phases of the Reconquista. Andalusia has historically been an agricultural region, compared to the rest of Spain and the rest of Europe. Still, the growth of the community in the sectors of industry and services was above average in Spain and higher than many communities in the Eurozone. The region has a rich culture and a strong Spanish identity. Many cultural phenomena that are seen internationally as distinctively Spanish are largely or entirely Andalusian in origin. These include flamenco and, to a lesser extent, bullfighting and Hispano-Moorish architectural styles, both of which are also prevalent in some other regions of Spain. Andalusia's hinterland is the hottest area of Europe, with cities like Córdoba and Seville averaging above in summer high temperatures. Late evening temperatures can sometimes stay around until close to midnight and daytime highs of over are common. Seville also has the highest average annual temperature in mainland Spain and mainland Europe (), closely followed by Almería (). Name Its present form is derived from the Arabic name for Muslim Iberia, "Al-Andalus". The etymology of the name "Al-Andalus" is disputed, and the extent of Iberian territory encompassed by the name has changed over the centuries. The Spanish place name Andalucía (immediate source of the English Andalusia) was introduced into the Spanish languages in the 13th century under the form el Andalucía. The name was adopted to refer to those territories still under Moorish rule, and generally south of Castilla Nueva and Valencia, and corresponding with the former Roman province hitherto called Baetica in Latin sources. This was a Castilianization of Al-Andalusiya, the adjectival form of the Arabic language al-Andalus, the name given by the Arabs to all of the Iberian territories under Muslim rule from 711 to 1492. The etymology of al-Andalus is itself somewhat debated (see al-Andalus), but in fact it entered the Arabic language before this area came under Moorish rule. Like the Arabic term al-Andalus, in historical contexts the Spanish term Andalucía or the English term Andalusia do not necessarily refer to the exact territory designated by these terms today. Initially, the term referred exclusively to territories under Muslim control. Later, it was applied to some of the last Iberian territories to be regained from the Muslims, though not always to exactly the same ones. In the Estoria de España (also known as the Primera Crónica General) of Alfonso X of Castile, written in the second half of the 13th century, the term Andalucía is used with three different meanings: As a literal translation of the Arabic al-Ándalus when Arabic texts are quoted. To designate the territories the Christians had regained by that time in the Guadalquivir valley and in the Kingdoms of Granada and Murcia. In a document from 1253, Alfonso X styled himself Rey de Castilla, León y de toda Andalucía ("King of Castile, León and all of Andalusia"). To designate the territories the Christians had regained by that time in the Guadalquivir valley until that date (the Kingdoms of Jaén, Córdoba and Seville – the Kingdom of Granada was incorporated in 1492). This was the most common significance in the Late Middle Ages and Early modern period. From an administrative point of view, Granada remained separate for many years even after the completion of the Reconquista due, above all, to its emblematic character as the last territory regained, and as the seat of the important Real Chancillería de Granada, a court of last resort. Still, the reconquest and repopulation of Granada was accomplished largely by people from the three preexisting Christian kingdoms of Andalusia, and Granada came to be considered a fourth kingdom of Andalusia. The often-used expression "Four Kingdoms of Andalusia" dates back in Spanish at least to the mid-18th century. Symbols The Andalusian emblem shows the figure of Hercules and two lions between the two pillars of Hercules that tradition situates on either side of the Strait of Gibraltar. An inscription below, superimposed on an image of the flag of Andalusia reads Andalucía por sí, para España y la Humanidad ("Andalusia for herself, Spain and Humanity"). Over the two columns is a semicircular arch in the colours of the flag of Andalusia, with the Latin words Dominator Hercules Fundator (Lord Hercules is the Founder) superimposed. The official flag of Andalusia consists of three equal horizontal stripes, coloured green, white, and green respectively; the Andalusian coat of arms is superimposed on the central stripe. Its design was overseen by Blas Infante and approved in the Assembly of Ronda (a 1918 gathering of Andalusian nationalists at Ronda). Blas Infante considered these to have been the colours most used in regional symbols throughout the region's history. According to him, the green came in particular from the standard of the Umayyad Caliphate and represented the call for a gathering of the populace. The white symbolised pardon in the Almohad dynasty, interpreted in European heraldry as parliament or peace. Other writers have justified the colours differently, with some Andalusian nationalists referring to them as the Arbonaida, meaning white-and-green in Mozarabic, a Romance language that was spoken in the region in Muslim times. Nowadays, the Andalusian government states that the colours of the flag evoke the Andalusian landscape as well as values of purity and hope for the future. The anthem of Andalusia was composed by José del Castillo Díaz (director of the Municipal Band of Seville, commonly known as Maestro Castillo) with lyrics by Blas Infante. The music was inspired by Santo Dios, a popular religious song sung at harvest time by peasants and day labourers in the provinces of Málaga, Seville, and Huelva. Blas Infante brought the song to Maestro Castillo's attention; Maestro Castillo adapted and harmonized the traditional melody. The lyrics appeal to the Andalusians to mobilise and demand tierra y libertad ("land and liberty") by way of agrarian reform and a statute of autonomy within Spain. The Parliament of Andalusia voted unanimously in 1983 that the preamble to the Statute of Autonomy recognise Blas Infante as the Father of the Andalusian Nation (Padre de la Patria Andaluza), which was reaffirmed in the reformed Statute of Autonomy submitted to popular referendum 18 February 2007. The preamble of the present 2007 Statute of Autonomy says that Article 2 of the present Spanish Constitution of 1978 recognises Andalusia as a nationality. Later, in its articulation, it speaks of Andalusia as a "historic nationality" (Spanish: nacionalidad histórica). It also cites the 1919 Andalusianist Manifesto of Córdoba describing Andalusia as a "national reality" (realidad nacional), but does not endorse that formulation. Article 1 of the earlier 1981 Statute of Autonomy defined it simply as a "nationality" (nacionalidad). The national holiday, Andalusia Day, is celebrated on 28 February, commemorating the 1980 autonomy referendum. In spite of this, nationalist groups celebrate the holiday on 4 December, commemorating the 1977 demonstrations to demand autonomy. The honorific title of Hijo Predilecto de Andalucía ("Favourite Son of Andalucia") is granted by the Autonomous Government of Andalusia to those whose exceptional merits benefited Andalusia, for work or achievements in natural, social, or political science. It is the highest distinction given by the Autonomous Community of Andalusia. Geography The Sevillian historian Antonio Domínguez Ortiz wrote that: Location Andalusia has a surface area of , 17.3% of the territory of Spain. Andalusia alone is comparable in extent and in the variety of its terrain to any of several of the smaller European countries. To the east is the Mediterranean Sea; to the west Portugal and the Gulf of Cádiz (Atlantic Ocean); to the north the Sierra Morena constitutes the border with the Meseta Central; to the south, the self-governing British overseas territory of Gibraltar and the Strait of Gibraltar separate it from Morocco. Climate Andalusia is home to the hottest and driest summers in Spain, but in the west, weather systems sweeping in from the Atlantic ensure that it is relatively wet in the winter, with some areas receiving copious amounts. Contrary to what many people think, as a whole, the region enjoys above-average yearly rainfall in the context of Spain. Andalusia sits at a latitude between 36° and 38° 44' N, in the warm-temperate region. In general, it experiences a hot-summer Mediterranean climate, with dry summers influenced by the Azores High, but subject to occasional torrential rains and extremely hot temperatures. In the winter, the tropical anticyclones move south, allowing cold polar fronts to penetrate the region. Still, within Andalusia there is considerable climatic variety. From the extensive coastal plains one may pass to the valley of the Guadalquivir, barely above sea level, then to the highest altitudes in the Iberian peninsula in the peaks of the Sierra Nevada. In a mere one can pass from the subtropical coast of the province of Granada to the snowy peaks of Mulhacén. Andalusia also includes both the dry Tabernas Desert in the province of Almería and the Sierra de Grazalema Natural Park in the province of Cádiz, which experiences Spain's greatest rainfall. Annual rainfall in the Sierra de Grazalema has been measured as high as in 1963, the highest ever recorded for any location in Iberia. Andalusia is also home to the driest place in continental Europe, the Cabo de Gata, with only of rain per year. In general, as one goes from west to east, away from the Atlantic, there is less precipitation. "Wet Andalusia" includes most of the highest points in the region, above all the Sierra de Grazalema but also the Serranía de Ronda in western Málaga. The valley of the Guadalquivir has moderate rainfall. The Tabernas Desert in Almería, Europe's only true desert, has less than 75 days with any measurable precipitation, and some particular places in the desert have as few as 50 such days. Much of "dry Andalusia" has more than 300 sunny days a year. The average temperature in Andalusia throughout the year is over . Averages in the cities range from in Baeza to in Almería. Much of the Guadalquivir valley and the Mediterranean coast has an average of about . The coldest month is January when Granada at the foot of the Sierra Nevada experiences an average temperature of . The hottest are July and August, with an average temperature of for Andalusia as a whole. Córdoba is the hottest provincial capital, followed by Seville. The Guadalquivir valley has experienced some of the highest temperatures recorded in Europe, with a maximum of recorded at Córdoba (14 August 2021), and Seville. The mountains of Granada and Jaén have the coldest temperatures in southern Iberia, but do not reach continental extremes (and, indeed are surpassed by some mountains in northern Spain). In the cold snap of January 2005, Santiago de la Espada (Jaén) experienced a temperature of and the ski resort at Sierra Nevada National Park—the southernmost ski resort in Europe—dropped to . Sierra Nevada Natural Park has Iberia's lowest average annual temperature, ( at Pradollano) and its peaks remain snowy practically year-round. Terrain Mountain ranges affect climate, the network of rivers, soils and their erosion, bioregions, and even human economies insofar as they rely on natural resources. The Andalusian terrain offers a range of altitudes and slopes. Andalusia has the Iberian peninsula's highest mountains and nearly 15 percent of its terrain over . The picture is similar for areas under (with the Baetic Depression), and for the variety of slopes. The Atlantic coast is overwhelmingly beach and gradually sloping coasts; the Mediterranean coast has many cliffs, above all in the Malagan Axarquía and in Granada and Almería. This asymmetry divides the region naturally into (two mountainous areas) and (the broad basin of the Guadalquivir). The Sierra Morena separates Andalusia from the plains of Extremadura and Castile–La Mancha on Spain's Meseta Central. Although sparsely populated, this is not a particularly high range, and its highest point, the peak of La Bañuela in the Sierra Madrona, lies outside of Andalusia. Within the Sierra Morena, the gorge of Despeñaperros forms a natural frontier between Castile and Andalusia. The Baetic Cordillera consists of the parallel mountain ranges of the Cordillera Penibética near the Mediterranean coast and the Cordillera Subbética inland, separated by the Surco Intrabético. The Cordillera Subbética is quite discontinuous, offering many passes that facilitate transportation, but the Penibético forms a strong barrier between the Mediterranean coast and the interior. The Sierra Nevada, part of the Cordillera Penibética in the Province of Granada, has the highest peaks in Iberia: El Mulhacén at and El Veleta at . Lower Andalusia, the Baetic Depression, the basin of the Guadalquivir, lies between these two mountainous areas. It is a nearly flat territory, open to the Gulf of Cádiz in the southeast. Throughout history, this has been the most populous part of Andalusia. Hydrography Andalusia has rivers that flow into both the Atlantic and the Mediterranean. Flowing to the Atlantic are the Guadiana, Odiel-Tinto, Guadalquivir, Guadalete, and Barbate. Flowing to the Mediterranean are the Guadiaro, Guadalhorce, Guadalmedina, Guadalfeo, Andarax (also known as the Almería) and Almanzora. Of these, the Guadalquivir is the longest in Andalusia and fifth longest on the Iberian peninsula, at . The rivers of the Atlantic basin are characteristically long, run through mostly flat terrain, and have broad river valleys. As a result, at their mouths are estuaries and wetlands, such as the marshes of Doñana in the delta of the Guadalquivir, and wetlands of the Odiel. In contrast, the rivers of the Mediterranean Basin are shorter, more seasonal, and make a precipitous descent from the mountains of the Baetic Cordillera. Their estuaries are small, and their valleys are less suitable for agriculture. Also, being in the rain shadow of the Baetic Cordillera means that they receive a lesser volume of water. The following hydrographic basins can be distinguished in Andalusia. On the Atlantic side are the Guadalquivir basin; the Andalusian Atlantic Basin with the sub-basins Guadalete-Barbate and Tinto-Odiel; and the Guadiana basin. On the Mediterranean side is the Andalusian Mediterranean Basin and the upper portion of the basin of the Segura. Soils The soils of Andalusia can be divided into three large areas: the Sierra Morena, Cordillera Subbética, and the Baetic Depression and the Surco Intrabético. The Sierra Morena, due to its morphology and the acidic content of its rocks, developed principally relatively poor, shallow soils, suitable only for forests. In the valleys and in some areas where limestone is present, deeper soils allowed farming of cereals suitable for livestock. The more complicated morphology of the Baetic Cordillera makes it more heterogeneous, with the most heterogeneous soils in Andalusia. Very roughly, in contrast to the Sierra Morena, a predominance of basic (alkaline) materials in the Cordillera Subbética, combined with a hilly landscape, generates deeper soils with greater agricultural capacity, suitable to the cultivation of olives. Finally, the Baetic Depression and the Surco Intrabético have deep, rich soils, with great agricultural capacity. In particular, the alluvial soils of the Guadalquivir valley and plain of Granada have a loamy texture and are particularly suitable for intensive irrigated crops. In the hilly areas of the countryside, there is a double dynamic: the depressions have filled with older lime-rich material, developing the deep, rich, dark clay soils the Spanish call bujeo, or tierras negras andaluzas, excellent for dryland farming. In other zones, the whiter albariza provides an excellent soil for vineyards. Despite their marginal quality, the poorly consolidated soils of the sandy coastline of Huelva and Almería have been successfully used in recent decades for hothouse cultivation under clear plastic of strawberries, raspberries, blueberries, and other fruits. Flora Biogeographically, Andalusia forms part of the Western Mediterranean subregion of the Mediterranean Basin, which falls within the Boreal Kingdom. Five floristic provinces lie, in whole or in part, within Andalusia: along much of the Atlantic coast, the Lusitanian-Andalusian littoral or Andalusian Atlantic littoral; in the north, the southern portion of the Luso-Extremaduran floristic province; covering roughly half of the region, the Baetic floristic province; and in the extreme east, the Almerian portion of the Almerian-Murcian floristic province and (coinciding roughly with the upper Segura basin) a small portion of the Castilian-Maestrazgan-Manchegan floristic province. These names derive primarily from past or present political geography: "Luso" and "Lusitanian" from Lusitania, one of three Roman provinces in Iberia, most of the others from present-day Spanish provinces, and Maestrazgo being a historical region of northern Valencia. In broad terms, the typical vegetation of Andalusia is Mediterranean woodland, characterized by leafy xerophilic perennials, adapted to the long, dry summers. The dominant species of the climax community is the holly oak (Quercus ilex). Also abundant are cork oak (Quercus suber), various pines, and Spanish fir (Abies pinsapo). Due to cultivation, olive (Olea europaea) and almond (Prunus dulcis) trees also abound. The dominant understory is composed of thorny and aromatic woody species, such as rosemary (Rosmarinus officinalis), thyme (Thymus), and Cistus. In the wettest areas with acidic soils, the most abundant species are the oak and cork oak, and the cultivated Eucalyptus. In the woodlands, leafy hardwoods of genus Populus (poplars, aspens, cottonwoods) and Ulmus (elms) are also abundant; poplars are cultivated in the plains of Granada. The Andalusian woodlands have been much altered by human settlement, the use of nearly all of the best land for farming, and frequent wildfires. The degraded forests become shrubby and combustible garrigue. Extensive areas have been planted with non-climax trees such as pines. There is now a clear conservation policy for the remaining forests, which survive almost exclusively in the mountains. Fauna The biodiversity of Andalusia extends to its fauna as well. More than 400 of the 630 vertebrate species extant in Spain can be found in Andalusia. Spanning the Mediterranean and Atlantic basins, and adjacent to the Strait of Gibraltar, Andalusia is on the migratory route of many of the numerous flocks of birds that travel annually from Europe to Africa and back. The Andalusian wetlands host a rich variety of birds. Some are of African origin, such as the red-knobbed coot (Fulica cristata), the purple swamphen (Porphyrio porphyrio), and the greater flamingo (Phoenicopterus roseus). Others originate in Northern Europe, such as the greylag goose (Anser anser). Birds of prey (raptors) include the Spanish imperial eagle (Aquila adalberti), the griffon vulture (Gyps fulvus), and both the black and red kite (Milvus migrans and Milvus milvus). Among the herbivores, are several deer (Cervidae) species, notably the fallow deer (Dama dama) and roe deer (Capreolus capreolus); the European mouflon (Ovis aries musimon), a feral sheep; and the Spanish ibex (Capra pyrenaica, which despite its scientific name is no longer found in the Pyrenees). The Spanish ibex has recently been losing ground to the Barbary sheep (Ammotragus lervia), an invasive species from Africa, introduced for hunting in the 1970s. Among the small herbivores are rabbits—especially the European rabbit (Oryctolagus cuniculus)—which form the most important part of the diet of the carnivorous species of the Mediterranean woodlands. The large carnivores such as the Iberian wolf (Canis lupus signatus) and the Iberian lynx (Lynx pardinus) are quite threatened, and are limited to the Sierra de Andújar, inside of Sierra Morena, Doñana and Despeñaperros. Stocks of the wild boar (Sus scrofa), on the other hand, have been well preserved because they are popular with hunters. More abundant and in varied situations of conservation are such smaller carnivores as otters, dogs, foxes, the European badger (Meles meles), the European polecat (Mustela putorius), the least weasel (Mustela nivalis), the European wildcat (Felis silvestris), the common genet (Genetta genetta), and the Egyptian mongoose (Herpestes ichneumon). Other notable species are Acherontia atropos (a variety of death's-head hawkmoth), Vipera latasti (a venomous snake), and the endemic (and endangered) fish Aphanius baeticus. Protected areas Andalusia has many unique ecosystems. In order to preserve these areas in a manner compatible with both conservation and economic exploitation, many of the most representative ecosystems have been given protected status. The various levels of protection are encompassed within the Network of Protected Natural Spaces of Andalusia (Red de Espacios Naturales Protegidos de Andalucía, RENPA) which integrates all protected natural spaces located in Andalusia, whether they are protected at the level of the local community, the autonomous community of Andalusia, the Spanish state, or by international conventions. RENPA consists of 150 protected spaces, consisting of two national parks, 24 natural parks, 21 periurban parks (on the fringes of cities or towns), 32 natural sites, two protected countrysides, 37 natural monuments, 28 nature reserves, and four concerted nature reserves (in which a government agency coordinates with the owner of the property for its management), all part of the European Union's Natura 2000 network. Under the international ambit are the nine Biosphere Reserves, 20 Ramsar wetland sites, four Specially Protected Areas of Mediterranean Importance and two UNESCO Geoparks. In total, nearly 20 percent of the territory of Andalusia lies in one of these protected areas, which constitute roughly 30 percent of the protected territory of Spain. Among these many spaces, some of the most notable are the Sierras de Cazorla, Segura y Las Villas Natural Park, Spain's largest natural park and the second largest in Europe, the Sierra Nevada National Park, Doñana National Park and Natural Park, the Tabernas Desert, and the Cabo de Gata-Níjar Natural Park, the largest terrestrial-maritime reserve in the European Western Mediterranean Sea. History The geostrategic position of Andalusia in the extreme south of Europe, providing (along with Morocco) a gateway between Europe and Africa, added to its position between the Atlantic Ocean and the Mediterranean Sea, as well as its rich deposits of minerals and its agricultural wealth, have made Andalusia a tempting prize for civilizations since prehistoric times. Add to this its area of (larger than many European countries), and it can be no surprise that Andalusia has figured prominently in the history of Europe and the Mediterranean. Several theories postulate that the first hominids in Europe were in Andalusia, having passed across the Strait of Gibraltar; the earliest known paintings of humanity have been found in the Caves of Nerja, Málaga. The first settlers, based on artifacts from the archaeological sites at Los Millares, El Argar, and Tartessos, were clearly influenced by cultures of the Eastern Mediterranean who arrived on the Andalusian coast. Andalusia then went through a period of protohistory, when the region did not have a written language of its own, but its existence was known to and documented by literate cultures, principally the Phoenicians and Ancient Greeks, wide historical moment in which Cádiz was founded, regarded by many as the oldest city still standing in Western Europe; another city among the oldest is Málaga. During the second millennium BCE, the kingdom of Tartessos developed in Andalusia. Carthaginians and Romans With the fall of the original Phoenician cities in the East, Carthage – itself the most significant Phoenician colony – became the dominant sea power of the western Mediterranean and the most important trading partner for the Phoenician towns along the Andalusian coast. Between the First and Second Punic Wars, Carthage extended its control beyond Andalucia to include all of Iberia except the Basque Country. Some of the more prominent Andalusian cities during Carthaginian rule include Gadir (Cadiz), Qart Juba (Córdoba), Ilipa (near modern Seville), Malaka (Málaga) and Sexi or Seksi (near modern Almuñécar). Andalusia was the major staging ground for the war with Rome led by the Carthaginian general Hannibal. The Romans defeated the Carthaginians and conquered Andalusia, the region being renamed Baetica. It was fully incorporated into the Roman Empire, and from this region came many Roman magistrates and senators, as well as the emperors Trajan and (most likely) Hadrian. Vandals, Visigoths and the Byzantine Empire The Vandals moved briefly through the region during the 5th century AD before settling in North Africa, after which the region fell into the hands of the Visigothic Kingdom. The Visigoths in this region were practically independent of the Visigothic Catholic Kingdom of Toledo. This is the era of Saints Isidore of Seville and Hermenegild. During this period, around 555 AD, the Eastern Roman Empire conquered Andalusia under Justinian I, the Eastern Roman emperor. They established Spania, a province of the Byzantine Empire from 552 until 624. Though their holdings were quickly reduced, they continued to have interests in the region until it was lost altogether in 624. Al-Andalus states The Visigothic era came to an abrupt end in 711 with the Umayyad conquest of Hispania by the Muslim Umayyad general Tariq ibn Ziyad. Tariq is known in Umayyad history and legend as a formidable conqueror who dared and bore the nerve to burn his fleet of ships, when he landed with his troops on the coast of Gibraltar – an acronym of "Jabel alTariq" meaning "the mountain of Tariq". When the Muslim invaders seized control and consolidated their dominion of the region, they remained tolerant of the local faiths, but they also needed a place for their own faith. In the 750s, they forcibly rented half of Cordoba's Cathedral of San Vicente (Visigothic) to use as a mosque. The mosque's hypostyle plan, consisting of a rectangular prayer hall and an enclosed courtyard, followed a tradition established in the Umayyad and Abbasid mosques of Syria and Iraq while the dramatic articulation of the interior of the prayer hall was unprecedented. The system of columns supporting double arcades of piers and arches with alternating red and white voussoirs is an unusual treatment that, structurally, combined striking visual effect with the practical advantage of providing greater height within the hall. Alternating red and white voussoirs are associated with Umayyad monuments such as the Great Mosque of Damascus and the Dome of the Rock. Their use in the Great Mosque of Cordoba manages to create a stunningly original visual composition even as it emphasises 'Abd al-Rahman's connection to the established Umayyad tradition. In this period, the name "Al-Andalus" was applied to the Iberian Peninsula, and later it referred to the parts not controlled by the Gothic states in the North. The Muslim rulers in Al-Andalus were economic invaders and interested in collecting taxes; social changes imposed on the native populace were mainly confined to geographical, political and legal conveniences. Al-Andalus remained connected to other states under Muslim rule; also trade routes between it and Constantinople and Alexandria remained open, while many cultural features of the Roman Empire were transmitted throughout Europe and the Near East by its successor state, the Byzantine Empire. Byzantine architecture is an example of such cultural diffusion continuing even after the collapse of the empire. Nevertheless, the Guadalquivir River valley became the point of power projection in the peninsula with the Caliphate of Cordoba making Cordoba its capital. The Umayyad Caliphate produced such leaders as Caliph Abd-ar-Rahman III (ruled 912–961) and his son, Caliph Al-Hakam II (ruled 961–976) and built the magnificent Great Mosque of Cordoba. Under these rulers, Cordoba was the center of economic and cultural significance. By the 10th century, the northern Kingdoms of Spain and other European Crowns had begun what would eventually become the Reconquista: the reconquest of the Iberian Peninsula for Christendom. Caliph Abd-ar-Rahman suffered some minor military defeats, but often managed to manipulate the Gothic northern kingdoms to act against each other's interests. Al-Hakam achieved military successes, but at the expense of uniting the north against him. In the 10th century the Saracen rulers of Andalusia had a Slavic army of 13,750 men. After the conquest of Toledo in 1086 by Alfonso VI, the Crown of Castille and the Crown of Aragon dominated large parts of the peninsula. The main Taifas therefore had to resort to assistance from various other powers across the Mediterranean. A number of different Muslim dynasties of North African origin—notably Almoravid dynasty and Almohad dynasty—dominated a slowly diminishing Al-Andalus over the next several centuries. After the victory at the Battle of Sagrajas (1086) put a temporary stop to Castilian expansion, the Almoravid dynasty reunified Al-Andalus with its capital in Cordoba, ruling until the mid-12th century. The various Taifa kingdoms were assimilated. the Almohad dynasty expansion in North Africa weakened Al-Andalus, and in 1170 the Almohads transferred their capital from Marrakesh to Seville. The victory at the Battle of Las Navas de Tolosa (1212) marked the beginning of the end of the Almohad dynasty. Crown of Castile The weakness caused by the collapse of Almohad power and the subsequent creation of new Taifas, each with its own ruler, led to the rapid Castile reconquest of the valley of the Guadalquivir. Córdoba was regained in 1236 and Seville in 1248. The fall of Granada on 2 January 1492 put an end to the Nasrid rule, event that marks the beginning of Andalusia, the southern four territories of the Crown of Castile in the Iberian Peninsula. Seven months later, on 3 August 1492 Christopher Columbus left the town of Palos de la Frontera, Huelva, with the first expedition that resulted in the Discovery of the Americas, that would end the Middle Ages and signal the beginning of modernity. Many Castilians participated in this and other expeditions that followed, some of them known as the Minor or Andalusian Journeys. Contacts between Spain and the Americas, including royal administration and the shipping trade from Asia and America for over three hundred years, came almost exclusively through the south of Spain, specially Seville and Cadiz ports. As a result, it became the wealthiest, most influential region in Spain and amongst the most influential in Europe. For example, the Habsburg diverted much of this trade wealth to control its European territories. Habsburg Spain In the first half of the 16th century plague was still prevalent in Spain. According to George C. Kohn, "One of the worst epidemics of the century, whose miseries were accompanied by severe drought and food shortage, started in 1505; by 1507, about 100,000 people had died in Andalusia alone. Andalusia was struck once again in 1646. For three years, plague haunted the entire region, causing perhaps as many as 200,000 deaths, especially in Málaga and Seville." Following the Second Rebellion of the Alpujarras in 1568–1571, the Moorish population—that is, unconverted Moriscos—were expelled from Kingdom of Castile (and Aragon). Yet, by order of the Spanish crown, two Moorish families were required to remain in each village in order to demonstrate to the new inhabitants, introduced from northern Spain, the workings of the terracing and irrigation systems on which the district's agriculture depends. In 1810–12 Spanish troops strongly resisted the French occupation during the Peninsular War (part of the Napoleonic Wars). Andalusia profited from the Spanish overseas empire, although much trade and finance eventually came to be controlled by other parts of Europe to where it was ultimately destined. In the 18th century, commerce from other parts of Spain began to displace Andalusian commerce when the Spanish government ended Andalusia's trading monopoly with the colonies in the Americas. The loss of the empire in the 1820s hurt the economy of the region, particularly the cities that had benefited from the trade and ship building. The construction of railways in the latter part of the 19th century enabled Andalusia to better develop its agricultural potential and it became an exporter of food. While industrialisation was taking off in the northern Spanish regions of Catalonia and the Basque country, Andalusia remained traditional and displayed a deep social division between a small class of wealthy landowners and a population made up largely of poor agricultural labourers and tradesmen. Francoist oppressions Andalusia was one of the worst affected regions of Spain by Francisco Franco's brutal campaign of mass-murder and political suppression called the White Terror during and after the Spanish Civil War. The Nationalist rebels bombed and seized the working-class districts of the main Andalusian cities in the first days of the war, and afterwards went on to execute thousands of workers and militants of the leftist parties: in the city of Cordoba 4,000; in the city of Granada 5,000; in the city of Seville 3,028; and in the city of Huelva 2,000 killed and 2,500 disappeared. The city of Málaga, occupied by the Nationalists in February 1937 following the Battle of Málaga, experienced one of the harshest repressions following Francoist victory with an estimated total of 17,000 people summarily executed. Carlos Arias Navarro, then a young lawyer who as public prosecutor signed thousands of execution warrants in the trials set up by the triumphant rightists, became known as "The Butcher of Málaga" (Carnicero de Málaga). Paul Preston estimates the total number of victims of deliberately killed by the Nationalists in Andalusia at 55,000. Government and politics Andalusia is one of the 17 autonomous communities of Spain. The Regional Government of Andalusia (Spanish: Junta de Andalucía) includes the Parliament of Andalusia, its chosen president, a Consultative Council, and other bodies. The Autonomous Community of Andalusia was formed in accord with a referendum of 28 February 1980 and became an autonomous community under the 1981 Statute of Autonomy known as the Estatuto de Carmona. The process followed the Spanish Constitution of 1978, still current as of 2009, which recognizes and guarantees the right of autonomy for the various regions and nationalities of Spain. The process to establish Andalusia as an autonomous region followed Article 151 of the Constitution, making Andalusia the only autonomous community to take that particular course. That article was set out for regions like Andalusia that had been prevented by the outbreak of the Spanish Civil War from adopting a statute of autonomy during the period of the Second Spanish Republic. Article 1 of the 1981 Statute of Autonomy justifies autonomy based on the region's "historical identity, on the self-government that the Constitution permits every nationality, on outright equality to the rest of the nationalities and regions that compose Spain, and with a power that emanates from the Andalusian Constitution and people, reflected in its Statute of Autonomy". In October 2006 the constitutional commission of the Cortes Generales (the national legislature of Spain), with favorable votes from the left-of-center Spanish Socialist Workers' Party (PSOE), the leftist United Left (IU) and the right-of-center People's Party (PP), approved a new Statute of Autonomy for Andalusia, whose preamble refers to the community as a "national reality" (realidad nacional): On 2 November 2006 the Spanish Chamber Deputies ratified the text of the Constitutional Commission with 306 votes in favor, none opposed, and 2 abstentions. This was the first time a Spanish Organic Law adopting a Statute of Autonomy was approved with no opposing votes. The Senate, in a plenary session of 20 December 2006, ratified the referendum to be voted upon by the Andalusian public 18 February 2007. The Statute of Autonomy spells out Andalusia's distinct institutions of government and administration. Chief among these is the Andalusian Autonomous Government (Junta de Andalucía). Other institutions specified in the Statute are the Defensor del Pueblo Andaluz (literally "Defender of the Andalusian People", basically an ombudsperson), the Consultative Council, the Chamber of Accounts, the Audiovisual Council of Andalusia, and the Economic and Social Council. The Andalusian Statute of Autonomy recognizes Seville as the region's capital. The Andalusian Autonomous Government is located there. The region's highest court, the High Court of Andalusia (Tribunal Superior de Justicia de Andalucía) is not part of the Autonomous Government, and has its seat in Granada. Autonomous Government The Andalusian Autonomous Government (Junta de Andalucía) is the institution of self-government of the Autonomous Community of Andalusia. Within the government, the President of the Regional Government of Andalusia is the supreme representative of the autonomous community, and the ordinary representative of the Spanish state in the autonomous community. The president is formally named to the position by the Monarch of Spain and then confirmed by a majority vote of the Parliament of Andalusia. In practice, the monarch always names a person acceptable to the ruling party or coalition of parties in the autonomous region. In theory, were the candidate to fail to gain the needed majority, the monarch could propose a succession of candidates. After two months, if no proposed candidate could gain the parliament's approval, the parliament would automatically be dissolved and the acting president would call new elections. On 5 September 2013 Susana Díaz was elected president. The Council of Government, the highest political and administrative organ of the Community, exercises regulatory and executive power. The President presides over the council, which also includes the heads of various departments (Consejerías). In the current legislature (2008–2012), there are 15 of these departments. In order of precedence, they are Presidency, Governance, Economy and Treasury, Education, Justice and Public Administration, Innovation, Science and Business, Public Works and Transportation, Employment, Health, Agriculture and Fishing, Housing and Territorial Planning, Tourism, Commerce and Sports, Equality and Social Welfare, Culture, and Environment. The Parliament of Andalusia, its Autonomic Legislative Assembly, develops and approves laws and elects and removes the President. Elections to the Andalusian Parliament follow a democratic formula through which the citizens elect 109 representatives. After the approval of the Statute of Autonomy through Organic Law 6/1981 on 20 December 1981, the first elections to the autonomic parliament took place 23 May 1982. Further elections have occurred in 1986, 1990, 1994, 1996, 2000, 2004, and 2008. The current (2008–2012) legislature includes representatives of the PSOE-A (Andalusian branch of the left-of-center PSOE), PP-A (Andalusian branch of the right-of-center PP) and IULV-CA (Andalusian branch of the leftist IU). Judicial power The High Court of Andalusia (Tribunal Superior de Justicia de Andalucía) in Granada is subject only to the higher jurisdiction of the Supreme Court of Spain. The High Court is not an organ of the Autonomous Community, but rather of the Judiciary of Spain, which is unitary throughout the kingdom and whose powers are not transferred to the autonomous communities. The Andalusian territory is divided into 88 legal/judicial districts (partidos judiciales). Administrative divisions Provinces Andalusia consists of eight provinces. The latter were established by Javier de Burgos in the 1833 territorial division of Spain. Each of the Andalusian provinces bears the same name as its capital: Andalusia is traditionally divided into two historical subregions: or (Andalucía Oriental), consisting of the provinces of Almería, Granada, Jaén, and Málaga, and or (Andalucía Occidental), consisting of the provinces of Cádiz, Córdoba, Huelva and Seville. Comarcas and mancomunidades Within the various autonomous communities of Spain, comarcas are comparable to shires (or, in some countries, counties) in the English-speaking world. Unlike in some of Spain's other autonomous communities, under the original 1981 Statute of Autonomy, the comarcas of Andalusia had no formal recognition, but, in practice, they still had informal recognition as geographic, cultural, historical, or in some cases administrative entities. The 2007 Statute of Autonomy echoes this practice, and mentions comarcas in Article 97 of Title III, which defines the significance of comarcas and establishes a basis for formal recognition in future legislation. The current statutory entity that most closely resembles a comarca is the mancomunidad, a freely chosen, bottom-up association of municipalities intended as an instrument of socioeconomic development and coordination between municipal governments in specific areas. Municipalities and local entities Beyond the level of provinces, Andalusia is further divided into 774 municipalities (municipios). The municipalities of Andalusia are regulated by Title III of the Statute of Autonomy, Articles 91–95, which establishes the municipality as the basic territorial entity of Andalusia, each of which has legal personhood and autonomy in many aspects of its internal affairs. At the municipal level, representation, government and administration is performed by the ayuntamiento (municipal government), which has competency for urban planning, community social services, supply and treatment of water, collection and treatment of waste, and promotion of tourism, culture, and sports, among other matters established by law. Among the more important Andalusian cities besides the provincial capitals are: El Ejido, Níjar and Roquetas de Mar (Almería) La Línea de la Concepción, Algeciras, Sanlúcar de Barrameda, San Fernando, Chiclana de la Frontera, Puerto Real, Arcos de la Frontera, Jerez and El Puerto de Santa María (Cádiz) Lucena, Pozoblanco, Montilla and Puente Genil (Córdoba) Almuñécar, Guadix, Loja and Motril (Granada) Linares, Andújar, Úbeda and Baeza (Jaén) Marbella, Mijas, Vélez-Málaga, Fuengirola, Torremolinos, Estepona, Benalmádena, Antequera, Rincón de la Victoria and Ronda (Málaga) Utrera, Dos Hermanas, Alcalá de Guadaíra, Osuna, Mairena del Aljarafe, Écija and Lebrija (Sevilla) In conformity with the intent to devolve control as locally as possible, in many cases, separate nuclei of population within municipal borders each administer their own interests. These are variously known as pedanías ("hamlets"), villas ("villages"), aldeas (also usually rendered as "villages"), or other similar names. Main cities Demographics Andalusia ranks first by population among the 17 autonomous communities of Spain. The estimated population at the beginning of 2009 was 8,285,692. The population is concentrated, above all, in the provincial capitals and along the coasts, so that the level of urbanization is quite high; half the population is concentrated in the 28 cities of more than 50,000 inhabitants. The population is aging, although the process of immigration is countering the inversion of the population pyramid. Population change At the end of the 20th century, Andalusia was in the last phase of demographic transition. The death rate stagnated at around 8–9 per thousand, and the population came to be influenced mainly by birth and migration. In 1950, Andalusia had 20.04 percent of the national population of Spain. By 1981, this had declined to 17.09 percent. Although the Andalusian population was not declining in absolute terms, these relative losses were due to emigration great enough to nearly counterbalance having the highest birth rate in Spain. Since the 1980s, this process has reversed on all counts, and as of 2009, Andalusia has 17.82 percent of the Spanish population. The birth rate is sharply down, as is typical in developed economies, although it has lagged behind much of the rest of the world in this respect. Furthermore, prior emigrants have been returning to Andalusia. Beginning in the 1990s, others have been immigrating in large numbers as well, as Spain has become a country of net immigration. At the beginning of the 21st century, statistics show a slight increase in the birth rate, due in large part to the higher birth rate among immigrants. The result is that as of 2009, the trend toward rejuvenation of the population is among the strongest of any autonomous community of Spain, or of any comparable region in Europe. Structure At the beginning of the 21st century, the population structure of Andalusia shows a clear inversion of the population pyramid, with the largest cohorts falling between ages 25 and 50. Comparison of the population pyramid in 2008 to that in 1986 shows: A clear decrease in the population under the age of 25, due to a declining birth rate. An increase in the adult population, as the earlier, larger cohort born in the "baby boom" of the 1960s and 1970s reach adulthood. This effect has been exacerbated by immigration: the largest contingent of immigrants are young adults. A further increase in the adult population, and especially the older adult population, due to increased life expectancy. As far as composition by sex, two aspects stand out: the higher percentage of women in the elderly population, owing to women's longer life expectancy, and, on the other hand, the higher percentage of men of working age, due in large part to a predominantly male immigrant population. Immigration In 2005, 5.35 percent of the population of Andalusia were born outside of Spain. This is a relatively low number for a Spanish region, the national average being three percentage points higher. The immigrants are not evenly distributed among the Andalusian provinces: Almería, with a 15.20 percent immigrant population, is third among all provinces in Spain, while at the other extreme Jaén is only 2.07 percent immigrants and Córdoba 1.77 percent. The predominant nationalities among the immigrant populations are Moroccan (92,500, constituting 17.79 percent of the foreigners living in Andalusia) and British (15.25 percent across the region). When comparing world regions rather than individual countries, the single largest immigrant block is from the region of Latin America, outnumbering not only all North Africans, but also all non-Spanish Western Europeans. Demographically, this group has provided an important addition to the Andalusian labor force. Economy Andalusia is traditionally an agricultural area, but the service sector (particularly tourism, retail sales, and transportation) now predominates. The once booming construction sector, hit hard by the 2009 recession, was also important to the region's economy. The industrial sector is less developed than most other regions in Spain. Between 2000 and 2006 economic growth per annum was 3.72%, one of the highest in the country. Still, according to the Spanish Instituto Nacional de Estadística (INE), the GDP per capita of Andalusia (€17,401; 2006) remains the second lowest in Spain, with only Extremadura lagging behind. The Gross domestic product (GDP) of the autonomous community was 160.6 billion euros in 2018, accounting for 13.4% of Spanish economic output. GDP per capita adjusted for purchasing power was 20,500 euros or 68% of the EU27 average in the same year. Primary sector The primary sector, despite adding the least of the three sectors to the regional GDP remains important, especially when compared to typical developed economies. The primary sector produces 8.26 percent of regional GDP, 6.4 percent of its GVA and employs 8.19 percent of the workforce. In monetary terms it could be considered a rather uncompetitive sector, given its level of productivity compared to other Spanish regions. In addition to its numeric importance relative to other regions, agriculture and other primary sector activities have strong roots in local culture and identity. The primary sector is divided into a number of subsectors: agriculture, commercial fishing, animal husbandry, hunting, forestry, mining, and energy. Agriculture, husbandry, hunting, and forestry For many centuries, agriculture dominated Andalusian society, and, with 44.3 percent of its territory cultivated and 8.4 percent of its workforce in agriculture as of 2016 it remains an integral part of Andalusia's economy. However, its importance is declining, like the primary and secondary sectors generally, as the service sector is increasingly taking over. The primary cultivation is dryland farming of cereals and sunflowers without artificial irrigation, especially in the vast countryside of the Guadalquivir valley and the high plains of Granada and Almería-with a considerably lesser and more geographically focused cultivation of barley and oats. Using irrigation, maize, cotton and rice are also grown on the banks of the Guadalquivir and Genil. The most important tree crops are olives, especially in the Subbetic regions of the provinces of Córdoba and Jáen, where irrigated olive orchards constitute a large component of agricultural output. There are extensive vineyards in various zones such as Jerez de la Frontera (sherry), Condado de Huelva, Montilla-Moriles and Málaga. Fruits—mainly citrus fruits—are grown near the banks of the Guadalquivir; almonds, which require far less water, are grown on the high plains of Granada and Almería. In monetary terms, by far the most productive and competitive agriculture in Andalusia is the intensive forced cultivation of strawberries, raspberries, blueberries, and other fruits grown under hothouse conditions under clear plastic, often in sandy zones, on the coasts, in Almería and Huelva. Organic farming has recently undergone rapid expansion in Andalusia, mainly for export to European markets but with increasing demand developing in Spain. Andalusia has a long tradition of animal husbandry and livestock farming, but it is now restricted mainly to mountain meadows, where there is less pressure from other potential uses. Andalusians have a long and colourful history of dog breeding that can be observed throughout the region today. The raising of livestock now plays a semi-marginal role in the Andalusian economy, constituting only 15 percent of the primary sector, half the number for Spain taken as a whole. "Extensive" raising of livestock grazes the animals on natural or cultivated pastures, whereas "intensive" raising of livestock is based in fodder rather than pasture. Although the productivity is higher than with extensive techniques, the economics are quite different. While intensive techniques now dominate in Europe and even in other regions of Spain, most of Andalusia's cattle, virtually all of its sheep and goats, and a good portion of its pigs are raised by extensive farming in mountain pastures. This includes the Black Iberian pigs that are the source of Jamón ibérico. Andalusia's native sheep and goats present a great economic opportunity in a Europe where animal products are generally in strong supply, but the sheep and goat meat, milk, and leather (and the products derived from these) are relatively scarce. Dogs are bred not just as companion animals, but also as herding animals used by goat and sheep herders. Hunting remains relatively important in Andalusia, but has largely lost its character as a means of obtaining food. It is now more of a leisure activity linked to the mountain areas and complementary to forestry and the raising of livestock. Dogs are frequently used as hunting companions to retrieve killed game. The Andalusian forests are important for their extent—50 percent of the territory of Andalusia—and for other less quantifiable environmental reasons, such as their value in preventing erosion, regulating the flow of water necessary for other flora and fauna. For these reasons, there is legislation in place to protect the Andalusian forests. The value of forest products as such constitutes only 2 percent of agricultural production. This comes mostly from cultivated species—eucalyptus in Huelva and poplar in Granada—as well as naturally occurring cork oak in the Sierra Morena. Fishing Fishing is a longstanding tradition on the Andalusian coasts. Fish and other seafood have long figured prominently in the local diet and in the local gastronomic culture: fried fish (pescaito frito in local dialect), white prawns, almadraba tuna, among others. The Andalusian fishing fleet is Spain's second largest, after Galicia, and Andalusia's 38 fishing ports are the most of any Spanish autonomous community. Commercial fishing produces only 0.5 percent of the product of the regional primary sector by value, but there are areas where it has far greater importance. In the province of Huelva it constitutes 20 percent of the primary sector, and locally in Punta Umbría 70 percent of the work force is involved in commercial fishing. Failure to comply with fisheries laws regarding the use of trawling, urban pollution of the seacoast, destruction of habitats by coastal construction (for example, alteration of the mouths of rivers, construction of ports), and diminution of fisheries by overexploitation have created a permanent crisis in the Andalusian fisheries, justifying attempts to convert the fishing fleet. The decrease in fish stocks has led to the rise of aquaculture, including fish farming both on the coasts and in the interior. Mining Despite the general poor returns in recent years, mining retains a certain importance in Andalusia. Andalusia produces half of Spain's mining product by value. Of Andalusia's production, roughly half comes from the province of Huelva. Mining for precious metals at Minas de Riotinto in Huelva (see Rio Tinto Group) dates back to pre-Roman times; the mines were abandoned in the Middle Ages and rediscovered in 1556. Other mining activity is coal mining in the Guadiato valley in the province of Córdoba; various metals at Aznalcóllar in the province of Seville, and iron at Alquife in the province of Granada. In addition, limestone, clay, and other materials used in construction are well distributed throughout Andalusia. Secondary sector: industry The Andalusian industrial sector has always been relatively small. Nevertheless, in 2007, Andalusian industry earned 11.979 million euros and employed more than 290,000 workers. This represented 9.15 percent of regional GDP, far below the 15.08 the secondary sector represents in the economy of Spain as a whole. By analyzing the different subsectors of the food industry Andalusian industry accounts for more than 16% of total production. In a comparison with the Spanish economy, this subsector is virtually the only food that has some weight in the national economy with 16.16%. Lies far behind the manufacturing sector of shipping materials just over 10% of the Spanish economy. Companies like Cruzcampo (Heineken Group), Puleva, Domecq, Santana Motors or Renault-Andalusia, are exponents of these two subsectors. Of note is the Andalusian aeronautical sector, which is second nationally only behind Madrid and represents approximately 21% of total turnover in terms of employment, highlighting companies like Airbus, Airbus Military, or the newly formed Aerospace Alestis. On the contrary it is symptomatic of how little weight the regional economy in such important sectors such as textiles or electronics at the national level. Andalusian industry is also characterized by a specialization in industrial activities of transforming raw agricultural and mineral materials. This is largely done by small enterprises without the public or foreign investment more typical of a high level of industrialization. Tertiary sector: services In recent decades the Andalusian tertiary (service) sector has grown greatly, and has come to constitute the majority of the regional economy, as is typical of contemporary economies in developed nations. In 1975 the service sector produced 51.1 percent of local GDP and employed 40.8 percent of the work force. In 2007, this had risen to 67.9 percent of GDP and 66.42 percent of jobs. This process of "tertiarization" of the economy has followed a somewhat unusual course in Andalusia. This growth occurred somewhat earlier than in most developed economies and occurred independently of the local industrial sector. There were two principal reasons that "tertiarization" followed a different course in Andalusia than elsewhere: 1. Andalusian capital found it impossible to compete in the industrial sector against more developed regions, and was obligated to invest in sectors that were easier to enter. 2. The absence of an industrial sector that could absorb displaced agricultural workers and artisans led to the proliferation of services with rather low productivity. This unequal development compared to other regions led to a hypertrophied and unproductive service sector, which has tended to reinforce underdevelopment, because it has not led to large accumulations of capital. Tourism in Andalusia Due in part to the relatively mild winter and spring climate, the south of Spain is attractive to overseas visitors–especially tourists from Northern Europe. While inland areas such as Jaén, Córdoba and the hill villages and towns remain relatively untouched by tourism, the coastal areas of Andalusia have heavy visitor traffic for much of the year. Among the autonomous communities, Andalusia is second only to Catalonia in tourism, with nearly 30 million visitors every year. The principal tourist destinations in Andalusia are the Costa del Sol and (secondarily) the Sierra Nevada. As discussed above, Andalusia is one of the sunniest and warmest places in Europe, making it a center of "sun and sand" tourism, but not only it. Around 70 percent of the lodging capacity and 75 percent of the nights booked in Andalusian hotels are in coastal municipalities. The largest number of tourists come in August—13.26 percent of the nights booked throughout the year—and the smallest number in December—5.36 percent. On the west (Atlantic) coast are the Costa de la Luz (provinces of Huelva and Cádiz), and on the east (Mediterranean) coast, the Costa del Sol (provinces of Cádiz y Málaga), Costa Tropical (Granada and part of Almería) and the Costa de Almería. In 2004, the Blue Flag beach program of the non-profit Foundation for Environmental Education recognized 66 Andalusian beaches and 18 pleasure craft ports as being in a good state of conservation in terms of sustainability, accessibility, and quality. Nonetheless, the level of tourism on the Andalusian coasts has been high enough to have a significant environmental impact, and other organizations—such as the Spanish Ecologists in Action (Ecologistas en Acción) with their description of "Black Flag beaches" or Greenpeace—have expressed the opposite sentiment. Still, Hotel chains such as Fuerte Hotels have ensured that sustainability within the tourism industry is one of their highest priorities. Together with "sand and sun" tourism, there has also been a strong increase in nature tourism in the interior, as well as cultural tourism, sport tourism, and conventions. One example of sport and nature tourism is the ski resort at Sierra Nevada National Park. As for cultural tourism, there are hundreds of cultural tourist destinations: cathedrals, castles, forts, monasteries, and historic city centers and a wide variety of museums. It can be highlighted that Spain has seven of its 42 cultural UNESCO World Heritage Sites in Andalucia: Alhambra, Generalife and Albayzín, Granada (1984,1994) Antequera Dolmens Site (2016) 10th Century Caliphate City of Medina Azahara (2018) Cathedral, Alcázar and Archivo de Indias in Seville (1987) Historic Centre of Cordoba (1984,1994) Renaissance Monumental Ensembles of Úbeda and Baeza (2003) Rock Art of the Mediterranean Basin on the Iberian Peninsula (1998) Further, there are the Lugares colombinos, significant places in the life of Christopher Columbus: Palos de la Frontera, La Rábida Monastery, and Moguer) in the province of Huelva. There are also archeological sites of great interest: the Roman city of Italica, birthplace of Emperor Trajan and (most likely) Hadrian or Baelo Claudia near Tarifa. Andalusia was the birthplace of such great painters as Velázquez and Murillo (Seville) and, more recently, Picasso (Málaga); Picasso is memorialized by his native city at the Museo Picasso Málaga and Natal House Foundation; the Casa de Murillo was a house museum 1982–1998, but is now mostly offices for the Andalusian Council of Culture. The CAC Málaga (Museum of Modern Art) is the most visited museum of Andalusia and has offered exhibitions of artists such as Louise Bourgeois, Jake and Dinos Chapman, Gerhard Richter, Anish Kapoor, Ron Mueck or Rodney Graham. Malaga is also located part of the private Carmen Thyssen-Bornemisza Collection at Carmen Thyssen Museum. There are numerous other significant museums around the region, both of paintings and of archeological artifacts such as gold jewelry, pottery and other ceramics, and other works that demonstrate the region's artisanal traditions. The Council of Government has designated the following "Municipios Turísticos": in Almería, Roquetas de Mar; in Cádiz, Chiclana de la Frontera, Chipiona, Conil de la Frontera, Grazalema, Rota, and Tarifa; in Granada, Almuñécar; in Huelva, Aracena; in Jaén, Cazorla; in Málaga, Benalmádena, Fuengirola, Nerja, Rincón de la Victoria, Ronda, and Torremolinos; in Seville, Santiponce. Monuments and features Alcazaba, Almería Cueva de Menga, Antequera (Málaga) El Torcal, Antequera (Málaga) Medina Azahara, Córdoba Mosque, Córdoba Mudejar Quarter, Frigiliana (Málaga) Alhambra, Granada Palace of Charles V, Granada Charterhouse, Granada Albayzín, Granada La Rabida Monastery, Palos de la Frontera (Huelva) Castle of Santa Catalina, Jaén Jaén Cathedral, Jaén Úbeda and Baeza, Jaén Alcazaba, Málaga Buenavista Palace, Málaga Málaga Cathedral, Málaga Puente Nuevo, Ronda (Málaga) Caves of Nerja, Nerja (Málaga) Ronda Bullring, Ronda (Málaga) Giralda, Seville Torre del Oro, Seville Plaza de España, Seville Seville Cathedral, Seville Alcázar of Seville, Seville Unemployment The unemployment rate stood at 25.5% in 2017 and was one of the highest in Spain and Europe. Infrastructure Transport As in any modern society, transport systems are an essential structural element of the functioning of Andalusia. The transportation network facilitates territorial coordination, economic development and distribution, and intercity transportation. In urban transport, underdeveloped public transport systems put pedestrian traffic and other non-motorized traffic are at a disadvantage compared to the use of private vehicles. Several Andalusian capitals—Córdoba, Granada and Seville—have recently been trying to remedy this by strengthening their public transport systems and providing a better infrastructure for the use of bicycles. There are now three rapid transit systems operating in Andalucia – the Seville Metro, Málaga Metro and Granada Metro. Cercanías commuter rail networks operate in Seville, Málaga and Cádiz. For over a century, the conventional rail network has been centralized on the regional capital, Seville, and the national capital, Madrid; in general, there are no direct connections between provincial capitals. High-speed AVE trains run from Madrid via Córdoba to Seville and Málaga, from which a branch from Antequera to Granada opened in 2019. Further AVE routes are under construction. The Madrid-Córdoba-Seville route was the first high-velocity route in Spain (operating since 1992). Other principal routes are the one from Algeciras to Seville and from Almería via Granada to Madrid. Most of the principal roads have been converted into limited access highways known as autovías. The Autovía del Este (Autovía A-4) runs from Madrid through the Despeñaperros Natural Park, then via Bailén, Córdoba, and Seville to Cádiz, and is part of European route E05 in the International E-road network. The other main road in the region is the portion of European route E15, which runs as the Autovia del Mediterráneo along the Spanish Mediterranean coast. Parts of this constitute the superhighway Autopista AP-7, while in other areas it is Autovía A-7. Both of these roads run generally east–west, although the Autovía A-4 turns to the south in western Andalusia. Other first-order roads include the Autovía A-48 roughly along the Atlantic coast from Cádiz to Algeciras, continuing European route E05 to meet up with European route E15; the Autovía del Quinto Centenario (Autovía A-49), which continues west from Seville (where the Autovía A-4 turns toward the south) and goes on to Huelva and into Portugal as European route E01; the Autovía Ruta de la Plata (Autovía A-66), European route E803, which roughly corresponds to the ancient Roman 'Silver Route' from the mines of northern Spain, and runs north from Seville; the Autovía de Málaga (Autovía A-45), which runs south from Córdoba to Málaga; and the Autovía de Sierra Nevada (Autovía A-44), part of European route E902, which runs south from Jaén to the Mediterranean coast at Motril. As of 2008 Andalusia has six public airports, all of which can legally handle international flights. The Málaga Airport is dominant, handling 60.67 percent of passengers and 85 percent of its international traffic. The Seville Airport handles another 20.12 percent of traffic, and the Jerez Airport 7.17 percent, so that these three airports account for 87.96 percent of traffic. Málaga Airport is the international airport that offers a wide variety of international destinations. It has a daily link with twenty cities in Spain and over a hundred cities in Europe (mainly in Great Britain, Central Europe and the Nordic countries but also the main cities of Eastern Europe: Moscow, Saint Petersburg, Sofia, Riga or Bucharest), North Africa, Middle East (Riyadh, Jeddah and Kuwait) and North America (New York, Toronto and Montreal). The main ports are Algeciras (for freight and container traffic) and Málaga for cruise ships. Algeciras is Spain's leading commercial port, with of cargo in 2004. Seville has Spain's only commercial river port. Other significant commercial ports in Andalusia are the ports of the Bay of Cádiz, Almería and Huelva. The Council of Government has approved a Plan of Infrastructures for the Sustainability of Transport in Andalusia (PISTA) 2007–2013, which plans an investment of 30 billion euros during that period. Energy infrastructure The lack of high-quality fossil fuels in Andalusia has led to a strong dependency on petroleum imports. Still, Andalusia has a strong potential for the development of renewable energy, above all wind energy. The Andalusian Energy Agency established in 2005 by the autonomous government, is a new governmental organ charged with the development of energy policy and provision of a sufficient supply of energy for the community. The infrastructure for production of electricity consists of eight large thermal power stations, more than 70 hydroelectric power plants, two wind farms, and 14 major cogeneration facilities. Historically, the largest Andalusian business in this sector was the Compañía Sevillana de Electricidad, founded in 1894, absorbed into Endesa in 1996. The Solar power tower PS10 was built by the Andalusian firm Abengoa in Sanlúcar la Mayor in the province of Seville, and began operating in March 2007. It is the largest existing solar power facility in Europe. Smaller solar power stations, also recent, exist at Cúllar and Galera, Granada, inaugurated by Geosol and Caja Granada. Two more large thermosolar facilities, Andasol I y II, planned at Hoya de Guadix in the province of Granada are expected to supply electricity to half a million households. The Plataforma Solar de Almería (PSA) in the Tabernas Desert is an important center for the exploration of the solar energy. The largest wind power firm in the region is the Sociedad Eólica de Andalucía, formed by the merger of Planta Eólica del Sur S.A. and Energía Eólica del Estrecho S.A. The Medgaz gas pipeline directly connects the Algerian town of Béni Saf to Almería. Education As throughout Spain, basic education in Andalusia is free and compulsory. Students are required to complete ten years of schooling, and may not leave school before the age of 16, after which students may continue on to a baccalaureate, to intermediate vocational education, to intermediate-level schooling in arts and design, to intermediate sports studies, or to the working world. Andalusia has a tradition of higher education dating back to the Modern Age and the University of Granada, University of Baeza, and University of Osuna. As of 2009, there are ten private or public universities in Andalucia. University studies are structured in cycles, awarding degrees based on ECTS credits in accord with the Bologna process, which the Andalusian universities are adopting in accord with the other universities of the European Higher Education Area. Healthcare Responsibility for healthcare jurisdictions devolved from the Spanish government to Andalusia with the enactment of the Statute of Autonomy. Thus, the Andalusian Health Service (Servicio Andaluz de Salud) currently manages almost all public health resources of the Community, with such exceptions as health resources for prisoners and members of the military, which remain under central administration. Science and technology According to the Outreach Program for Science in Andalusia, Andalusia contributes 14 percent of Spain's scientific production behind only Madrid and Catalonia among the autonomous communities, even though regional investment in research and development (R&D) as a proportion of GDP is below the national average. The lack of research capacity in business and the low participation of the private sector in research has resulted in R&D taking place largely in the public sector. The Council of Innovation, Science and Business is the organ of the autonomous government responsible for universities, research, technological development, industry, and energy. The council coordinates and initiates scientific and technical innovation through specialized centers an initiatives such as the Andalusian Center for Marine Science and Technology (Centro Andaluz de Ciencia y Tecnología Marina) and Technological Corporation of Andalusia (Corporación Tecnológica de Andalucía). Within the private sphere, although also promoted by public administration, technology parks have been established throughout the Community, such as the Technological Park of Andalucia (Parque Tecnológico de Andalucía) in Campanillas on the outskirts of Málaga, and Cartuja 93 in Seville. Some of these parks specialize in specific sector, such as Aerópolis in aerospace or Geolit in food technology. The Andalusian government deployed 600,000 Ubuntu desktop computers in their schools. Media Andalusia has international, national, regional, and local media organizations, which are active gathering and disseminating information (as well as creating and disseminating entertainment). The most notable is the public Radio y Televisión de Andalucía (RTVA), broadcasting on two regional television channels, Canal Sur and Canal Sur 2, four regional radio stations, Canal Sur Radio, Canal Fiesta Radio, Radio Andalucía Información and Canal Flamenco Radio, as well as various digital signals, most notably Canal Sur Andalucía available on cable TV throughout Spain. Newspapers Different newspapers are published for each Andalusian provincial capital, comarca, or important city. Often, the same newspaper organization publishes different local editions with much shared content, with different mastheads and different local coverage. There are also popular papers distributed without charge, again typically with local editions that share much of their content. No single Andalusian newspaper is distributed throughout the region, not even with local editions. In eastern Andalusia the Diario Ideal has editions tailored for the provinces of Almería, Granada, and Jaén. Grupo Joly is based in Andalucia, backed by Andalusian capital, and publishes eight daily newspapers there. Efforts to create a newspaper for the entire autonomous region have not succeeded (the most recent as of 2009 was the Diario de Andalucía). The national press (El País, El Mundo, ABC, etc.) include sections or editions specific to Andalusia. Public television Andalusia has two public television stations, both operated by Radio y Televisión de Andalucía (RTVA): Canal Sur first broadcast on 28 February 1989 (Andalusia Day). Canal Sur 2 first broadcast 5 June 1998. Programming focuses on culture, sports, and programs for children and youth. In addition, RTVA also operates the national and international cable channel Canal Sur Andalucía, which first broadcast in 1996 as Andalucía Televisión. Radio There are four public radio stations in the region, all operated by RTVA: Canal Sur Radio, first broadcast October 1988. Radio Andalucía Información, first broadcast September 1998. Canal Fiesta Radio, first broadcast January 2001. Canal Flamenco Radio, first broadcast 29 September 2008. Art and culture The patrimony of Andalusia has been shaped by its particular history and geography, as well as its complex flows of population. Andalusia has been home to a succession of peoples and civilizations, many very different from one another, each impacting the settled inhabitants. The ancient Iberians were followed by Celts, Phoenicians and other Eastern Mediterranean traders, Romans, migrating Germanic tribes, Arabs or Berbers. All have shaped the Spanish patrimony in Andalusia, which was already diffused widely in the literary and pictorial genre of the costumbrismo andaluz. In the 19th century, Andalusian culture came to be widely viewed as the Spanish culture par excellence, in part thanks to the perceptions of romantic travellers. In the words of Ortega y Gasset: Arts Andalusia has been the birthplace of many great artists: the classic painters Velázquez, Murillo, and Juan de Valdés Leal; the sculptors Juan Martínez Montañés, Alonso Cano and Pedro de Mena; and such modern painters as Daniel Vázquez Díaz and Pablo Picasso. The Spanish composer Manuel de Falla was from Cádiz and incorporated typical Andalusian melodies in his works, as did Joaquín Turina, from Seville. The great singer Camarón de la Isla was born in San Fernando, Cádiz, and Andrés Segovia who helped shape the romantic-modernist approach to classical guitar, was born in Linares, Jaén. The virtuoso Flamenco guitar player Paco de Lucia who helped internationalize Flamenco, was born in Algeciras, Cadiz. Architecture Since the Neolithic era, Andalusia has preserved important megaliths, such as the dolmens at the Cueva de Menga and the Dolmen de Viera, both at Antequera. Archeologists have found Bronze Age cities at Los Millares and El Argar. Archeological digs at Doña Blanca in El Puerto de Santa María have revealed the oldest Phoenicians city in the Iberian peninsula; major ruins have also been revealed at Roman Italica near Seville. Some of the greatest architecture in Andalusia were developed across several centuries and civilizations. Such is the case of the Alhambra complex or the Cathedral of Córdoba. The traditional architecture of Andalusia retains its Roman with added Persian and Egyptian influences brought by Arabs, with a marked Mediterranean character strongly conditioned by the climate. Traditional urban houses are constructed with shared walls to minimize exposure to high exterior temperatures. Solid exterior walls are painted with lime to minimize the heating effects of the sun. In accord with the climate and tradition of each area, the roofs may be terraces or tiled in the Roman imbrex and tegula style. One of the most characteristic elements (and one of the most obviously influenced by Roman architecture) is the interior patio or courtyard; the patios of Córdoba are particularly famous. Other characteristic elements are decorative (and functional) wrought iron gratings and the tiles known as azulejos. Landscaping—both for common private homes and homes on a more lavish scale—also carries on older traditions, with plants, flowers, and fountains, pools, and streams of water. Beyond these general elements, there are also specific local architectural styles, such as the flat roofs, roofed chimneys, and radically extended balconies of the Alpujarra, the cave dwellings of Guadix and of Granada's Sacromonte, or the traditional architecture of the Marquisate of Zenete. The monumental architecture of the centuries immediately after the Reconquista often displayed an assertion of Christian hegemony through architecture that referenced non-Arab influences. Some of the greatest Renaissance buildings in Andalusia are from the then-kingdom of Jaén: the Jaén Cathedral, designed in part by Andrés de Vandelvira, served as a model for the Cathedral of Malaga and Guadix; the centers of Úbeda and Baeza, dating largely from this era, are UNESCO World Heritage Sites. Seville and its kingdom also figured prominently in this era, as is shown by the Casa consistorial de Sevilla, the Hospital de las Cinco Llagas, or the Charterhouse of Jerez de la Frontera. The Palace of Charles V in Granada is uniquely important for its Italianate purism. Andalusia also has such Baroque-era buildings as the Palace of San Telmo in Seville (seat of the current autonomic presidency), the Church of Our Lady of Reposo in Campillos, and the Granada Charterhouse. Academicism gave the region the Royal Tobacco Factory in Seville and Neoclassicism the nucleus of Cádiz, such as its city hall, Royal Prison, and the Oratorio de la Santa Cueva. Revivalist architecture in the 19th and 20th centuries contributed the buildings of the Ibero-American Exposition of 1929 in Seville, including the Neo-Mudéjar Plaza de España. Andalusia also preserves an important industrial patrimony related to various economic activities. Besides the architecture of the cities, there is also much outstanding rural architecture: houses, as well as ranch and farm buildings and dog houses. Sculpture The Iberian reliefs of Osuna, Lady of Baza, and León de Bujalance, the Phoenician sarcophagi of Cádiz, and the Roman sculptures of the Baetic cities such as Italica give evidence of traditions of sculpture in Andalusia dating back to antiquity. There are few significant surviving sculptures from the time of al-Andalus; two notable exceptions are the lions of the Alhambra and of the Maristán of Granada (the Nasrid hospital in the Albaicín). The Sevillian school of sculpture dating from the 13th century onward and the Granadan school beginning toward the end of the 16th century both focused primarily on Christian religious subject matter, including many wooden altarpieces. Notable sculptors in these traditions include Lorenzo Mercadante de Bretaña, Pedro Millán, Juan Martínez Montañés, Pedro Roldán, José de Arce, Jerónimo Balbás, Alonso Cano, and Pedro de Mena. Non-religious sculpture has also existed in Andalusia since antiquity. A fine example from the Renaissance era is the decoration of the Casa de Pilatos in Seville. Nonetheless, non-religious sculpture played a relatively minor role until such 19th-century sculptors as Antonio Susillo. Painting As in sculpture, there were Sevillian and the Granadan schools of painting. The former has figured prominently in the history of Spanish art since the 15th century and includes such important artists as Zurbarán, Velázquez and Murillo, as well as theoreticians of art such as Francisco Pacheco. The Museum of Fine Arts of Seville and the Prado contain numerous representative works of the Sevillian school of painting. A specific romantic genre known as costumbrismo andaluz depicts traditional and folkloric Andalusian subjects, such as bullfighting scenes, dogs, and scenes from Andalusia's history. Important artists in this genre include Manuel Barrón, José García Ramos, Gonzalo Bilbao and Julio Romero de Torres. The genre is well represented in the private Carmen Thyssen-Bornemisza Collection, part of which is on display at Madrid's Thyssen-Bornemisza Museum and Carmen Thyssen Museum in Málaga. Málaga also has been and is an important artistic center. Its most illustrious representative was Pablo Picasso, one of the most influential artists of the 20th century. The city has a Museum and Natal House Foundation, dedicated to the painter. Literature and philosophy Andalusia plays a significant role in the history of Spanish-language literature, although not all of the important literature associated with Andalusia was written in Spanish. Before 1492, there was the literature written in Andalusian Arabic. Hispano-Arabic authors native to the region include Ibn Hazm, Ibn Zaydún, Ibn Tufail, Al-Mu'tamid, Ibn al-Khatib, Ibn al-Yayyab, and Ibn Zamrak or Andalusian Hebrew poets as Solomon ibn Gabirol. Ibn Quzman, of the 12th century, crafted poems in the colloquial Andalusian language. In 1492 Antonio de Nebrija published his celebrated Gramática de la lengua castellana ("Grammar of the Castilian language"), the first such work for a modern European language. In 1528 Francisco Delicado wrote La lozana andaluza, a novel in the orbit of La Celestina, and in 1599 the Sevillian Mateo Alemán wrote the first part of Guzmán de Alfarache, the first picaresque novel with a known author. The prominent humanist literary school of Seville included such writers as Juan de Mal Lara, Fernando de Herrera, Gutierre de Cetina, Luis Barahona de Soto, Juan de la Cueva, Gonzalo Argote de Molina, and Rodrigo Caro. The Cordoban Luis de Góngora was the greatest exponent of the culteranismo of Baroque poetry in the Siglo de Oro; indeed, the style is often referred to as Góngorismo. Literary Romanticism in Spain had one of its great centers in Andalusia, with such authors as Ángel de Saavedra, 3rd Duke of Rivas, José Cadalso and Gustavo Adolfo Bécquer. Costumbrismo andaluz existed in literature as much as in visual art, with notable examples being the Escenas andaluzas of Serafín Estébanez Calderón and the works of Pedro Antonio de Alarcón. Andalusian authors Ángel Ganivet, Manuel Gómez-Moreno, Manuel and Antonio Machado, and Francisco Villaespesa are all generally counted in the Generation of '98. Also of this generation were the Quintero brothers, dramatists who faithfully captured Andalusian dialects and idiosyncrasies. Also of note, 1956 Nobel Prize-winning poet Juan Ramón Jiménez was a native of Moguer, near Huelva. A large portion of the avant-garde Generation of '27 who gathered at the Ateneo de Sevilla on the 300th anniversary of Góngora's death were Andalusians: Federico García Lorca, Luis Cernuda, Rafael Alberti, Manuel Altolaguirre, Emilio Prados, and 1977 Nobel laureate Vicente Aleixandre. Certain Andalusian fictional characters have become universal archetypes: Prosper Mérimée's gypsy Carmen, P. D. Eastman's Perro, Pierre Beaumarchais's Fígaro, and Tirso de Molina's Don Juan. As in most regions of Spain, the principal form of popular verse is the romance, although there are also strophes specific to Andalusia, such as the soleá or the . Ballads, lullabies, street vendor's cries, nursery rhymes, and work songs are plentiful. Among the philosophers native to the region can be counted Seneca, Avicebron, Maimonides, Averroes, Fernán Pérez de Oliva, Sebastián Fox Morcillo, Ángel Ganivet, Francisco Giner de los Ríos and María Zambrano. Music of Andalusia The music of Andalusia includes traditional and contemporary music, folk and composed music, and ranges from flamenco to rock. Conversely, certain metric, melodic and harmonic characteristics are considered Andalusian even when written or performed by musicians from elsewhere. Flamenco, perhaps the most characteristically Andalusian genre of music and dance, originated in the 18th century, but is based in earlier forms from the region. The influence of the traditional music and dance of the Romani people or Gypsies is particularly clear. The genre embraces distinct vocal (cante flamenco), guitar (toque flamenco), and dance (baile flamenco) styles. The Andalusian Statute of Autonomy reflects the cultural importance of flamenco in its Articles 37.1.18 and 68: Fundamental in the history of Andalusian music are the composers Cristóbal de Morales, Francisco Guerrero, Francisco Correa de Arauxo, Manuel García, Manuel de Falla, Joaquín Turina, and Manuel Castillo, as well as one of the fathers of modern classical guitar, the guitarist Andrés Segovia. Mention should also be made of the great folk artists of the copla (music) and the cante hondo, such as Rocío Jurado, Lola Flores (La Faraona, "the pharaoh"), Juanito Valderrama and the revolutionary Camarón de la Isla. Prominent Andalusian rock groups include Triana and Medina Azahara. The duo Los del Río from Dos Hermanas had international success with their "Macarena", including playing at a Super Bowl half-time show in the United States, where their song has also been used as campaign music by the Democratic Party. Other notables include the singer, songwriter, and poet Joaquín Sabina, Isabel Pantoja, Rosa López, who represented Spain at Eurovision in 2002, and David Bisbal. Film The portrayal of Andalusia in film is often reduced to archetypes: flamenco, bullfighting, Catholic pageantry, brigands, the property-rich and cash-poor señorito andaluz and emigrants. These images particularly predominated from the 1920s through the 1960s, and helped to consolidate a clichéd image of the region. In a very different vein, the province of Almería was the filming location for many Westerns, especially (but by no means exclusively) the Italian-directed Spaghetti Westerns. During the dictatorship of Francisco Franco, this was the extent of the film industry in Andalusia. Nonetheless, Andalusian film has roots as far back as José Val del Omar in the pre-Franco years, and since the Spanish transition to democracy has brought forth numerous nationally and internationally respected directors: Antonio Cuadri (Heart of the Earth), Chus Gutiérrez (Poniente), Chiqui Carabante (Carlos Against the World), Alberto Rodríguez (7 Virgins), Benito Zambrano (Solas), and Antonio Banderas (Summer Rain). Counting together feature films, documentaries, television programs, music videos etc., Andalusia has boomed from 37 projects shooting in 1999 to 1,054 in 2007, with the figure for 2007 including 19 feature films. Although feature films are the most prestigious, commercials and television are currently more economically important to the region. The Filmoteca de Andalucía, headquartered in Córdoba, is a government-run entity in charge of the investigation, collection and diffusion of Andalusian cinematic heritage. Other important contributors to this last activity are such annual film festivals as the Málaga Spanish Film Festival, the most important festival dedicated exclusively to cinema made in Spain, the Seville European Film Festival (SEFF), the International Festival of Short Films—Almería in Short, the Huelva Festival of Latin American Film, the Atlantic Film Show in Cádiz, the Islantilla Festival of Film and Television and the African Film Festival of Tarifa. Culture Customs and society Each sub-region in Andalusia has its own unique customs that represent a fusion of Catholicism and local folklore. Cities like Almería have been influenced historically by both Granada and Murcia in the use of traditional head coverings. The sombrero de Labrador, a worker's hat made of black velvet, is a signature style of the region. In Cádiz, traditional costumes with rural origins are worn at bullfights and at parties on the large estates. The tablao flamenco dance and the accompanying cante jondo vocal style originated in Andalusia and traditionally most often performed by the gypsy (Gitanos). One of the most distinctive cultural events in Andalusia is the Romería de El Rocío in May. It consists of a pilgrimage to the Hermitage of El Rocío in the countryside near Almonte, in honor of the Virgin of El Rocío, an image of the Virgin and Child. In recent times the Romería has attracted roughly a million pilgrims each year. In Jaén, the saeta is a revered form of Spanish religious song, whose form and style has evolved over many centuries. Saetas evoke strong emotion and are sung most often during public processions. Verdiales, based upon the fandango, are a flamenco music style and song form originating in Almogia, near Málaga. For this reason, the Verdiales are sometimes known as Fandangos de Málaga. The region also has a rich musical tradition of flamenco songs, or palos called cartageneras. Seville celebrates Semana Santa, one of the better known religious events within Spain. During the festival, religious fraternities dress as penitents and carry large floats of lifelike wooden sculptures representing scenes of the Passion, and images of the Virgin Mary. Sevillanas, a type of old folk music sung and written in Seville and still very popular, are performed in fairs and festivals, along with an associated dance for the music, the Baile por sevillanas. All the different regions of Andalusia have developed their own distinctive customs, but all share a connectedness to Catholicism as developed during baroque Spain society. Andalusian Spanish Andalusian Spanish is one of the most widely spoken forms of Spanish in Spain, and because of emigration patterns was very influential on American Spanish. Rather than a single dialect, it is really a range of dialects sharing some common features; among these is the retention of more Arabic words than elsewhere in Spain, as well as some phonological differences compared with Standard Spanish. The isoglosses that mark the borders of Andalusian Spanish overlap to form a network of divergent boundaries, so there is no clear border for the linguistic region. Religion The territory now known as Andalusia fell within the sphere of influence of ancient Mediterranean mythological beliefs. Phoenician colonization brought the cults of Baal and Melqart; the latter lasted into Roman times as Hercules, mythical founder of both Cádiz and Seville. The Islote de Sancti Petri held the supposed tomb of Hercules, with representations of his Twelve labors; the region was the traditional site of the tenth labor, obtaining the cattle of the monster Geryon. Traditionally, the Pillars of Hercules flank the Strait of Gibraltar. Clearly, the European pillar is the Rock of Gibraltar; the African pillar was presumably either Monte Hacho in Ceuta or Jebel Musa in Morocco. The Roman road that led from Cádiz to Rome was known by several names, one of them being Via Herculea, Hercules route returning from his tenth labor. The present coat of arms of Andalusia shows Hercules between two lions, with two pillars behind these figures. Roman Catholicism is, by far, the largest religion in Andalusia. In 2012, the proportion of Andalusians that identify themselves as Roman Catholic was 78.8%. The principal characteristic of the local popular form of Catholicism is devotion to the Virgin Mary; Andalusia is sometimes known as la tierra de María Santísima ("the land of Most Holy Mary"). Also characteristic are the processions during Holy Week, in which thousands of penitents (known as nazarenos) sing saetas. Andalusia is the site of such pilgrim destinations as the Santuario de Nuestra Señora de la Cabeza in Andújar and the Hermitage of El Rocío in Almonte. Bullfighting While some trace the lineage of the Spanish Fighting Bull back to Roman times, today's fighting bulls in the Iberian peninsula and in the former Spanish Empire trace back to Andalusia in the 15th and 16th centuries. Andalusia remains a center of bull-rearing and bullfighting: its 227 fincas de ganado where fighting bulls are raised cover . In the year 2000, Andalusia's roughly 100 bullrings hosted 1,139 corridas. The oldest bullring still in use in Spain is the neoclassical Plaza de toros in Ronda, built in 1784. The Andalusian Autonomous Government sponsors the Rutas de Andalucía taurina, a touristic route through the region centered on bullfighting. Festivals The Andalusian festivals provide a showcase for popular arts and traditional costume. Among the most famous of these are the Seville Fair or Feria de Abril in Seville, now echoed by smaller fairs in Madrid and Barcelona, both of which have many Andalusian immigrants; the Feria de Agosto in Málaga; the Feria de Jerez or Feria del Caballo in Jerez; the Festival of Corpus Christi in Granada; the Feria de Nuestra Señora de la Salud in Córdoba; the Columbian Festivals (Fiestas Colombinas) in Huelva; the Feria de la Virgen del Mar in Almería; and the Feria de San Lucas in Jaén, among many others. Festivals of a religious nature are a deep Andalusian tradition and are met with great popular fervor. There are numerous major festivals during Holy Week. An annual pilgrimage brings a million visitors to the Hermitage of El Rocío in Almonte (population 16,914 in 2008); similarly large crowds visit the Santuario de Nuestra Señora de la Cabeza in Andújar every April. Other important festivals are the Carnival of Cádiz and the Fiesta de las Cruces or Cruz de mayo in Granada and Córdoba; in Córdoba this is combined with a competition for among the patios (courtyards) of the city. Andalusia hosts an annual festival for the dance of flamenco in the summer-time. Cuisine The Andalusian diet varies, especially between the coast and the interior, but in general is a Mediterranean diet based on olive oil, cereals, legumes, vegetables, fish, dried fruits and nuts, and meat; there is also a great tradition of drinking wine. Fried fish—pescaíto frito—and seafood are common on the coast and also eaten well into the interior under coastal influence. Atlantic bluefin tuna (Thunnus thynnus) from the Almadraba areas of the Gulf of Cádiz, prawns from Sanlúcar de Barrameda (known as langostino de Sanlúcar), and deepwater rose shrimp () from Huelva are all highly prized. Fishing for the transparent goby or chanquete (Aphia minuta), a once-popular small fish from Málaga, is now banned because the techniques used to catch them trap too many immature fish of other species. The mountainous regions of the Sierra Morena and Sierra Nevada produce cured hams, notably including jamón serrano and jamón ibérico. These come from two different types of pig, (jamón serrano from white pigs, the more expensive jamón ibérico from the Black Iberian pig). There are several denominaciones de origen, each with its own specifications including in just which microclimate region ham of a particular denomination must be cured. Plato alpujarreño is another mountain specialty, a dish combining ham, sausage, sometimes other pork, egg, potatoes, and olive oil. Confectionery is popular in Andalusia. Almonds and honey are common ingredients. Many enclosed convents of nuns make and sell pastries, especially Christmas pastries: mantecados, polvorones, pestiños, alfajores, yemas de San Leandro, as well as churros or , meringue cookies (merengadas), and . Cereal-based dishes include migas de harina in eastern Andalusia (a similar dish to couscous rather than the fried breadcrumb based migas elsewhere in Spain) and a sweeter, more aromatic porridge called poleá in western Andalusia. Vegetables form the basis of such dishes as (similar to ratatouille) and the chopped salad known as or . Hot and cold soups based in olive oil, garlic, bread, tomato and peppers include gazpacho, salmorejo, porra antequerana, ajo caliente, sopa campera, or—using almonds instead of tomato—ajoblanco. Wine has a privileged place at the Andalusian table. Andalusian wines are known worldwide, especially fortified wines such as sherry (jerez), aged in soleras. These are enormously varied; for example, dry sherry may be the very distinct fino, manzanilla, amontillado, oloroso, or Palo Cortado and each of these varieties can each be sweetened with Pedro Ximénez or Moscatel to produce a different variety of sweet sherry. Besides sherry, Andalucía has five other denominaciones de origen for wine: D.O. Condado de Huelva, D.O. Manzanilla-Sanlúcar de Barrameda, D.O. Málaga, D.O. Montilla-Moriles, and D.O. Sierras de Málaga. Most Andalusian wine comes from one of these regions, but there are other historic wines without a Protected Geographical Status, for example Tintilla de Rota, Pajarete, Moscatel de Chipiona and Mosto de Umbrete. Andalusia also produces D.O. vinegar and brandy: D.O. Vinagre de Jerez and D.O. Brandy de Jerez. Other traditions The traditional dress of 18th-century Andalusia was strongly influenced by within the context of casticismo (purism, traditionalism, authenticity). The archetype of the majo and maja was that of a bold, pure Spaniard from a lower-class background, somewhat flamboyant in his or her style of dress. This emulation of lower-class dress also extended to imitating the clothes of brigands and Romani ("Gypsy") women. The Museum of Arts and Traditions of Sevilla has collected representative samples of a great deal of the history of Andalusian dress, including examples of such notable types of hat as the sombrero cordobés, sombrero calañés, sombrero de catite and the pavero, as well as the traje corto and traje de flamenca. Andalusia has a great artisan tradition in tile, leather (see Shell cordovan), weaving (especially of the heavy jarapa cloth), marquetry, and ceramics (especially in Jaén, Granada, and Almería), lace (especially Granada and Huelva), embroidery (in Andévalo), ironwork, woodworking, and basketry in wicker, many of these traditions a heritage of the long period of Muslim rule. Andalusia is also known for its dogs, particularly the Andalusian Hound, which was originally bred in the region. Dogs, not just andalusian hounds, are very popular in the region. Andalusian equestrianism, institutionalized in the Royal Andalusian School of Equestrian Art is known well beyond the borders of Spain. The Andalusian horse is strongly built, compact yet elegant, distinguished in the area of dressage and show jumping, and is also an excellent horse for driving. They are known for their elegant "dancing" gait. Sports Team sports In Andalusia, as throughout Spain, football is the predominant sport. Introduced to Spain by British men who worked in mining for Rio Tinto in the province of Huelva, the sport soon became popular with the local population. As Spain's oldest existing football club, Recreativo de Huelva, founded 1889, is known as El Decano ("the Dean"). For the 2019/20 season, 3 Andalusian clubs will compete in Spain's First Division La Liga: Granada CF, Real Betis, and Sevilla FC. Betis won La Liga in 1934–35 and Sevilla in the 1945–46 season. The seven other Andalusian teams, Cádiz CF, Córdoba CF, UD Almería and Málaga CF play in the Segunda División, whilst Recreativo de Huelva, Spain's oldest club and Marbella FC participate in the Segunda División B, and Real Jaén participates in the Tercera División. The Andalusia autonomous football team is not in any league, and plays only friendly matches. In recent years, they have played mostly during the Christmas break of the football leagues. They play mostly against national teams from other countries, but would not be eligible for international league play, where Spain is represented by a single national team. In recent decades, basketball has become increasingly popular, with CB Málaga, also known as Unicaja Málaga who have won the Liga ACB in 2007 and the Korać Cup in 2001 and usually play the Euroleague, CB Sevilla (Banca Cívica) and CB Granada competing at the top level in the Liga ACB. Unlike basketball, handball has never really taken off in Andalusia. There is one Andalusian team in the Liga Asobal, Spain's premier handball league: BM Puente Genil, playing in the province of Córdoba. Andalusia's strongest showing in sports has been in table tennis. There are two professional teams: Cajasur Priego TM and Caja Granada TM, the latter being Spain's leading table tennis team, with more than 20 league championships in nearly consecutive years and 14 consecutive Copas del Rey, dominating the Liga ENEBÉ. Cajasur is also one of the league's leading teams. Olympics 220 Andalusian athletes have competed in a total of 16 summer or winter Olympic Games. The first was Leopoldo Sainz de la Maza, part of the silver medal-winning polo team at the 1920 Summer Olympics in Antwerp, Belgium. In all, Andalusians have won six gold medals, 11 silver, and two bronze. Winners of multiple medals include the Cordoban boxer Rafael Lozano (bronze in the 1996 Summer Olympics at Atlanta, Georgia, US, and silver in the 2000 Summer Olympics in Sydney, Australia); sailor Theresa Zabell, Malagueña by adoption (gold medals at Barcelona in 1992 and Atlanta in 1996). Other notable winners have been Granadan tennis player Manuel Orantes (silver in the men's singles of the demonstration tournament in Mexico City in 1968), Jerezano riders Ignacio Rambla and Rafael Soto (silver in dressage in Athens in 2004) and the racewalker Paquillo Fernández from Guadix (silver in Athens in 2004). The largest number of Olympic appearances were by the Malagueña swimmer María Peláez (five appearances), the Granadan skier María José Rienda (four), the Sevillian rider Luis Astolfi (four), and the Sevillian rower Fernando Climent (four, including a silver at Los Angeles, California, US, in 1984. Seville has been a pre-candidate to host the Summer Olympics in two occasions, 2004 and 2008, and Granada has been a pre-candidate to host the winter Olympics; neither has ever succeeded in its candidature. The ski resort of Sierra Nevada, near Granada, has however hosted the 1996 Alpine World Ski Championships, and Granada hosted the 2015 Winter Universiade. Other sports Other sporting events in Andalusia include surfing, kitesurfing and windsurfing competitions at Tarifa, various golf tournaments at courses along the coast, and horse racing and polo at several locations in the interior. Andalusia hosted the 1999 World Championships in Athletics (Seville), the 2005 Mediterranean Games (Almería) and the FIS Alpine World Ski Championships 1996 (Granada), among other major events. There is also the annual Vuelta a Andalucía bicycle road race and the Linares chess tournament. The Circuito de Jerez, located near Jerez de la Frontera, hosts the Spanish motorcycle Grand Prix. Twinning and covenants Andalusia has had a sister region relationship with Buenos Aires (Argentina), since 2001; and with Córdoba (Argentina). Also Andalusia has a collaboration agreement with Guerrero (Mexico). See also Andalusian people Andalusian nationalism List of Andalusians Roman Bética Route White Towns of Andalusia Azulejo Yeseria List of the oldest mosques References External links Official site – Junta de Andalucia Andalucia Tourism Site Andalucia page at the guardian Autonomous communities of Spain NUTS 2 statistical regions of the European Union States and territories established in 1981 States and territories established in 2007

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

Abhorrers

Abhorrers, the name given in 1679 to the persons who expressed their abhorrence at the action of those who had signed petitions urging King Charles II of England to assemble Parliament. Feeling against Catholics, and especially against James, Duke of York, was running strongly; the Exclusion Bill had been passed by the House of Commons, and the popularity of James Scott, 1st Duke of Monmouth, was very great. To prevent this bill from passing into law, Charles had dissolved parliament in July 1679, and in the following October had prorogued its successor, which became known as the Exclusion Bill Parliament, without allowing it to meet. He was then deluged with petitions urging him to call it together, and this agitation was opposed by Sir George Jeffreys and Francis Wythens, who presented addresses expressing abhorrence of the Petitioners, and thus initiated the movement of the abhorrers, who supported the action of the king. "The frolic went all over England," says Roger North; and the addresses of the Abhorrers which reached the king from all parts of the country formed a counterblast to those of the Petitioners. It is said that the terms Whig and Tory were first applied to English political parties in consequence of this dispute. References 1679 in England Stuart England Political history of England

2740

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

Abiathar

Abiathar ( ’Evyatar, ’Ebiyatar, or ’Eviyathar, "the father is great"), in the Hebrew Bible, is a son of Ahimelech or Ahijah, High Priest at Nob, the fourth in descent from Eli and the last of Eli's House to be a High Priest. Bible account Abiathar was the only one of the priests to escape from Saul's (reigned c. 1020–1000 BCE) massacre in Nob, when his father and the priests of Nob were slain on the command of Saul. He fled to David (reigned c. 1003–970 BCE) at Keilah, taking with him the ephod and other priestly regalia. Rabbinical literature that linked the later extermination of the male descendants of David with the priests of Nob, also link the survival of David's descendant Joash with that of Abiathar. Abiathar joined David, who was then in the cave of Adullam. He remained with David, and became priest of the party of which he was the leader. He was of great service to David, especially at the time of the rebellion of Absalom. When David ascended the throne of Judah, Abiathar was appointed High Priest and the "king's counselor". Meanwhile, Zadok, of the house of Eleazar, had been made High Priest. Another version says he was Co-Pontiff with Zadok during King David. These appointments continued in force till the end of David's reign. In 1 Kings 4:4, Zadok and Abiathar are found acting together as priests under Solomon. Abiathar was deposed (the sole historical instance of the deposition of a high priest) and banished to his home at Anathoth by Solomon, because he took part in the attempt to raise Adonijah to the throne instead of Solomon. The priesthood thus passed from the house of Ithamar to the house of Eleazar. In rabbinic literature The rescue of the chief priest Abiathar, in the massacre of the priests of Nob ordered by Saul, was fortunate for the house of David; for if he had lost his life, David's descendants would through divine retaliation have been entirely wiped out of existence at the hands of Athaliah. It was David's acts that had really brought about the death of the priests, and to make amends he appointed Abiathar high priest. Abiathar retained the office until he was deserted by the Holy Spirit, without which the high priest could not successfully consult the Urim and Thummim. When David, on his flight from Absalom, recognized this loss in Abiathar, he felt compelled to put Zadok in his place. Abiathar's removal from the Priesthood fulfilled that other part of the curse on the House of Eli—that the Priesthood would pass out of the House of Eli. Confusion of the name In 2 Samuel 8:17 Ahimelech, the son of Abiathar is suggested to be read, with the Syriac, for Abiathar, the son of Ahimelech. A similar confusion occurs in Gospel of Mark: in reporting Jesus' words, the evangelist used the name Abiathar when we might expect to see Jesus mention his father Ahimelech. Suggestions made to resolve the difficulty — e.g. that father and son each bore the same double name, or that Abiathar officiated during his father's lifetime and in his father's stead—have been supported by great names, but have not been fully accepted. Later use of the name In Georgian traditions, Abiathar and Sidonia were a legendary Jewish priest of Mtskheta and his daughter. Abiathar is said to have been the first person Saint Nino converted to Christianity. "Abiathar" ( in Modern Hebrew) is sometimes used as a male given name in contemporary Israel (see Eviatar Banai, Eviatar Zerubavel, Eviatar Manor). See also Abiathar (name) References 11th-century BCE High Priests of Israel 10th-century BCE High Priests of Israel People associated with David Family of Eli (biblical figure)

2741

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

Abigail

Abigail () was an Israelite woman in the Hebrew Bible married to Nabal; she became married to the future King David after Nabal's death (1 Samuel ). Abigail was David's second wife, after Saul and Ahinoam's daughter, Michal, whom Saul later married to Palti, son of Laish when David went into hiding. She became the mother of one of David's sons, who is listed in the Book of Chronicles under the name Daniel, in the Masoretic Text of the Books of Samuel as Chileab, and in the Septuagint text of 2 Samuel 3:3 as Δαλουια, Dalouia. Her name is spelled Abigal in in the American Standard Version. Name Derived from the Hebrew word ab, "father", and the Hebrew root g-y-l, "to rejoice," the name Abigail has a variety of possible meanings including "my father's joy" and "source of joy". Biblical narrative In 1 Samuel 25, Nabal demonstrates ingratitude towards David, the son of Jesse (from the tribe of Judah), and Abigail attempts to placate David, in order to stop the future King from taking revenge. She gives him food, and speaks to him, urging him not to "have on his conscience the staggering burden of needless bloodshed" (verse 31, NIV) and reminding him that God will make him a "lasting dynasty" (verse 28). Jon Levenson calls this an "undeniable adumbration" of Nathan's prophecy in 2 Samuel 7. Alice Bach notes that Abigail pronounces a "crucial prophecy," and the Talmud regards her as one of the Tanakh's seven female prophets. Levenson, however, suggests that she "senses the drift of history" from intelligence rather than from special revelation. After Abigail reveals to Nabal what she has done, "God struck Nabal and he died," (v.38), after which David married her. Abigail is described as intelligent and beautiful. The Talmud amplifies this idea, mentioning her as being one of the "four women of surpassing beauty in the world," (the other three being Rahab, Sarah, and Esther). Being married to the wealthy Nabal, she is also a woman of high socioeconomic status. Whether David married her because he was attracted to her, or as an astute political move, or both is unclear. Abigail and David's second wife, Ahinoam the Jezreelite, accompany David and his war band as they seek refuge in Philistine territory. While David and his men are encamped near Jezreel, the women are captured by Amalekites who raided the town of Ziklag and carried off the women and children. David led the pursuit, and they were subsequently rescued. Both wives then settle with David in Hebron, where Abigail gives birth to David's second son, Chileab (also called Daniel). Abigail is also listed as one of the seven Jewish women prophets, the other six being Miriam, Deborah, Hannah, Sarah, Huldah, and Esther. In terms of her moral character, Abraham Kuyper argues that Abigail's conduct indicates "a most appealing character and unwavering faith," but Alice Bach regards her as subversive. Adele Berlin contrasts the story of Abigail with that of Bathsheba. In one, the wife prevents David from murdering her foolish and greedy husband. In the second, David orders the murder of a good man because he desires his wife. "In the Abigail story, David, the potential king, is seen as increasingly strong and virtuous, whereas in the Bathsheba story, the reigning monarch shows his flaws ever more overtly and begins to lose control of his family." Levenson and Halpern suggest that Abigail may, in fact, also be the same person as Abigail, mother of Amasa. Richard M. Davidson, however, points out that "on the basis of the final form of Old Testament canon, references to Abigail in the biblical accounts indicate two different individuals." Generic use Abigail's self-styling as a handmaid led to Abigail being a traditional term for a waiting-woman, for example as the waiting gentlewoman in Beaumont and Fletcher's The Scornful Lady, published in 1616. Jonathan Swift and Henry Fielding use Abigail in this generic sense, as does Charlotte Brontë. Scott, in The Abbot frequently refers to Lilias, Lady Avenel's maid as an “Abigail.” Anthony Trollope makes two references to the abigail (all lower case) in The Eustace Diamonds, at the beginning of Chapter 42, whilst Thomas Mann makes the same reference at the start of the second chapter of Part 2 in Buddenbrooks (published in 1901). William Rose Benet notes the notoriety of Abigail Hill, better known as "Mrs Masham", a lady-in-waiting to Queen Anne. George MacDonald Fraser makes mention of "an abigail fussing about the room" in his novel Flashman from The Flashman Papers series. In art Abigail is a featured figure on Judy Chicago's installation piece The Dinner Party, being represented in one of the 999 tiles of the Heritage Floor. Veneration Abigail is venerated in Catholic Church as "righteous", her feast day is 1 September. References Bibliography Chicago, Judy. The Dinner Party: From Creation to Preservation. London: Merrell (2007). . External links 10th-century BC women 11th-century BC women Wives of David Women in the Hebrew Bible 10th-century BC Semitic people 11th-century BC Semitic people Christian saints in unknown century Roman Catholic royal saints Eastern Orthodox royal saints Eastern Orthodox saints Christian royal saints Saints Christian saints from the Old Testament Old Testament people

2742

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

Abila

Abila, also spelled Abyla, may refer to: Towns Abila in Decapolis, also called Seleucia, northeast of present-day Irbid in Jordan Abila Lysaniou, capital of ancient Abilene, northwest of present-day Damascus in Syria Abila in Peraea, northeast of the northern shore of the Dead Sea, in present-day Jordan Abila in Hispania, the Latin name of Ávila, Spain Abila in Mauretania, a city on the African side of the Strait of Gibraltar Mountains Mt. Abila, the southern of the Pillars of Hercules near present-day Ceuta, probably Jebel Musa but possibly Monte Hacho Other Abila (grasshopper), a genus of grasshoppers See also Abela, a surname Abilene (biblical)

2745

https://en.wikipedia.org/wiki/Azad%20Kashmir

Azad Kashmir

Azad Jammu and Kashmir (; , ), abbreviated as AJK and colloquially referred to as simply Azad Kashmir, is a region administered by Pakistan as a nominally self-governing entity and constituting the western portion of the larger Kashmir region, which has been the subject of a dispute between India and Pakistan since 1947. The territory shares a border to the north with Gilgit-Baltistan, together with which it is referred to by the United Nations and other international organizations as "Pakistani-administered Kashmir". Azad Kashmir also shares borders with the Pakistani provinces of Punjab and Khyber Pakhtunkhwa to the south and west, respectively. On its eastern side, Azad Kashmir is separated from the Indian union territory of Jammu and Kashmir (part of Indian-administered Kashmir) by the Line of Control (LoC), which serves as the de facto border between the Indian- and Pakistani-controlled parts of Kashmir. Geographically, the administrative territory of Azad Jammu and Kashmir (which excludes Gilgit-Baltistan) covers a total area of and has a total population of 4,045,366 as per the 2017 national census. The territory has a parliamentary form of government modelled after the British Westminster system, with the city of Muzaffarabad serving as its capital. The President of AJK is the constitutional head of state, while the Prime Minister, supported by a Council of Ministers, is the chief executive. The unicameral Azad Kashmir Legislative Assembly elects both the Prime Minister and President. The territory has its own Supreme Court and a High Court, while the Government of Pakistan's Ministry of Kashmir Affairs and Gilgit-Baltistan serves as a link between itself and Azad Jammu and Kashmir's government, although the autonomous territory is not represented in the Parliament of Pakistan. Northern Azad Kashmir lies in a region that experiences strong vibrations of the earth as a result of the Indian plate underthrusting the Eurasian plate. A major earthquake in 2005 killed at least 100,000 people and left another three million people displaced, causing widespread devastation to the region's infrastructure and economy. Since then, with help from the Government of Pakistan and foreign aid, reconstruction of infrastructure is underway. Azad Kashmir's economy largely depends on agriculture, services, tourism, and remittances sent by members of the British Mirpuri community. Nearly 87% of Azad Kashmiri households own farm property, and the region has the highest rate of school enrolment in Pakistan and a literacy rate of approximately 72%. Name Azad Kashmir (Free Kashmir) was the title of a pamphlet issued by the Muslim Conference party at its 13th general session held in 1945 at Poonch. It is believed to have been a response to the National Conference's Naya Kashmir (New Kashmir) programme. Sources state that it was no more than a compilation of various resolutions passed by the party. But its intent seems to have been to declare that the Muslims of Jammu and Kashmir were committed to the Muslim League's struggle for a separate homeland (Pakistan), and that the Muslim Conference was their sole representative organisation. However, the following year, the party passed an "Azad Kashmir resolution" demanding that the maharaja institute a constituent assembly elected on an extended franchise. According to scholar Chitralekha Zutshi, the organisation's declared goal was to achieve responsible government under the aegis of the maharaja, without association with either India or Pakistan. The following year, the party workers assembled at the house of Sardar Ibrahim on 19 July 1947 reversed the decision, demanding that the maharaja accedes to Pakistan. Soon afterward, Sardar Ibrahim escaped to Pakistan and led the Poonch rebellion from there with the assistance of Pakistan's prime minister Liaquat Ali Khan and other officials. Liaquat Ali Khan appointed a committee headed by Mian Iftikharuddin to draft a "declaration of freedom". On 4 October an Azad Kashmir provisional government was declared in Lahore with Ghulam Nabi Gilkar as president under the assumed name "Mr. Anwar" and Sardar Ibrahim as the prime minister. Gilkar travelled to Srinagar and was arrested by the maharaja's government. Pakistani officials subsequently appointed Sardar Ibrahim as the president. Geography The northern part of Azad Jammu and Kashmir encompasses the lower area of the Himalayas, including Jamgarh Peak (). However, Sarwali Peak(6326 m) in Neelum Valley is the highest peak in the state. The region receives rainfall in both the winter and the summer. Muzaffarabad and Pattan are among the wettest areas of Pakistan. Throughout most of the region, the average rainfall exceeds 1400 mm, with the highest average rainfall occurring near Muzaffarabad (around 1800 mm). During the summer season, monsoon floods of the rivers Jhelum and Leepa are common due to extreme rains and snow melting. Climate The southern parts of Azad Kashmir, including the Bhimber, Mirpur, and Kotli districts, have extremely hot weather in the summer and moderate cold weather in the winter. They receive rain mostly in monsoon weather. In the central and northern parts of the state, the weather remains moderately hot in the summer and cold and chilly in the winter. Snowfall also occurs there in December and January. The region receives rainfall in both the winter and the summer. Muzaffarabad and Pattan are among the wettest areas of the state, but they don't receive snow. Throughout most of the region, the average rainfall exceeds 1400 mm, with the highest average rainfall occurring near Muzaffarabad (around 1800 mm). During summer, monsoon floods of the Jhelum and Leepa rivers are common, due to high rainfall and melting snow. History At the time of the Partition of India in 1947, the British abandoned their suzerainty over the princely states, which were left with the options of joining India or Pakistan or remaining independent. Hari Singh, the maharaja of Jammu and Kashmir, wanted his state to remain independent. Muslims in the western districts of the Jammu province (current day Azad Kashmir) and in the Frontier Districts province (current day Gilgit-Baltistan) had wanted to join Pakistan. In Spring 1947, an uprising against the maharaja broke out in Poonch, an area bordering the Rawalpindi division of West Punjab. The maharaja's administration is said to have started levying punitive taxes on the peasantry which provoked a local revolt and the administration resorted to brutal suppression. The area's population, swelled by recently demobilised soldiers following World War II, rebelled against the maharaja's forces and gained control of almost the entire district. Following this victory, the pro-Pakistan chieftains of the western districts of Muzaffarabad, Poonch and Mirpur proclaimed a provisional Azad Jammu and Kashmir government in Rawalpindi on October 3, 1947. Ghulam Nabi Gilkar, under the assumed name "Mr. Anwar," issued a proclamation in the name of the provisional government in Muzaffarabad. However, this government quickly fizzled out with the arrest of Anwar in Srinagar. On October 24, a second provisional government of Azad Kashmir was established at Palandri under the leadership of Sardar Ibrahim Khan. On October 21, several thousand Pashtun tribesmen from North-West Frontier Province poured into Jammu and Kashmir to "liberate" it from the maharaja's rule. They were led by experienced military leaders and were equipped with modern arms. The maharaja's crumbling forces were unable to withstand the onslaught. The raiders captured the towns of Muzaffarabad and Baramulla, the latter of which is northwest of the state capital Srinagar. On October 24, the Maharaja requested military assistance from India, which responded that it was unable to help him unless he acceded to India. Accordingly, on October 26, 1947, Maharaja Hari Singh signed an Instrument of Accession, handing over control of defence, external affairs, and communications to the Government of India in return for military aid. Indian troops were immediately airlifted into Srinagar. Pakistan intervened subsequently. Fighting ensued between the Indian and Pakistani armies, with the two areas of control more or less stabilised around what is now known as the "Line of Control". India later approached the United Nations, asking it to resolve the dispute, and resolutions were passed in favour of the holding of a plebiscite with regard to Kashmir's future. However, no such plebiscite has ever been held on either side, since there was a precondition that required the withdrawal of the Pakistani army along with the non-state elements and the subsequent partial withdrawal of the Indian army. from the parts of Kashmir under their respective control – a withdrawal that never took place. In 1949, a formal cease-fire line separating the Indian- and Pakistani-controlled parts of Kashmir came into effect. Following the 1949 cease-fire agreement with India, the government of Pakistan divided the northern and western parts of Kashmir that it controlled at the time of the cease-fire into the following two separately controlled political entities: Azad Jammu and Kashmir (AJK) – the narrow, southern part, long, with a width varying from . Gilgit–Baltistan formerly called the Federally Administered Northern Areas (FANA) – the much larger political entity to the north of AJK with an area of . In 1955, the Poonch uprising broke out. It was largely concentrated in areas of Rawalakot as well as the rest of Poonch Division. It ended in 1956. At one time under Pakistani control, Kashmir's Shaksgam tract, a small region along the northeastern border of Gilgit–Baltistan, was provisionally ceded by Pakistan to the People's Republic of China in 1963 and now forms part of China's Xinjiang Uygur Autonomous Region. In 1972, the then current border between the Indian and Pakistani controlled parts of Kashmir was designated as the "Line of Control". This line has remained unchanged since the 1972 Simla Agreement, which bound the two countries "to settle their differences by peaceful means through bilateral negotiations". Some political experts claim that, in view of that pact, the only solution to the issue is mutual negotiation between the two countries without involving a third party such as the United Nations. The 1974 Interim Constitution Act was passed by the 48-member Azad Jammu and Kashmir unicameral assembly. Government Azad Jammu and Kashmir (AJK) is nominally a self-governing state, but ever since the 1949 ceasefire between Indian and Pakistani forces, Pakistan has exercised control over the state without actually incorporating it into Pakistan. Azad Kashmir has its own elected president, prime minister, legislative assembly, high court (with Azam Khan as its present chief justice), and official flag. Azad Kashmir's financial matters, i.e., budget and tax affairs, are dealt with by the Azad Jammu and Kashmir Council rather than by Pakistan's Central Board of Revenue. The Azad Jammu and Kashmir Council is a supreme body consisting of 14 members, 8 from the government of Azad Jammu and Kashmir and 6 from the government of Pakistan. Its chairman/chief executive is the prime minister of Pakistan. Other members of the council are the president and the prime minister of Azad Kashmir (or an individual nominated by her/him) and 6 members of the AJK Legislative Assembly. Azad Kashmir Day is celebrated in Azad Jammu and Kashmir on October 24, which is the day that the Azad Jammu and Kashmir government was created in 1947. Pakistan has celebrated Kashmir Solidarity Day on February 5 of each year since 1990 as a day of protest against India's de facto sovereignty over its State of Jammu and Kashmir. That day is a national holiday in Pakistan. Pakistan observes the Kashmir Accession Day as Black Day on October 27 of each year since 1947 as a day of protest against the accession of Jammu and Kashmir State to India and its military presence in the Indian-controlled parts of Jammu and Kashmir. Brad Adams, the Asia director at the U.S.-based NGO Human Rights Watch said in 2006: "Although 'azad' means 'free,' the residents of Azad Kashmir are anything but; the Pakistani authorities govern the Azad Kashmir government with tight controls on basic freedoms." Scholar Christopher Snedden has observed that despite tight controls, the people of Azad Kashmir have generally accepted whatever Pakistan has done to them, which in any case has varied little from how most Pakistanis have been treated (by Pakistan). According to Christopher Snedden, one of the reasons for this was that the people of Azad Kashmir had always wanted to be part of Pakistan. Consequently, having little to fear from a pro-Pakistan population devoid of options, Pakistan imposed its will through the Federal Ministry of Kashmir Affairs and failed to empower the people of Azad Kashmir, allowing genuine self-government for only a short period in the 1970s. According to the interim constitution that was drawn up in the 1970s, the only political parties that are allowed to exist are those that pay allegiance to Pakistan: "No person or political party in Azad Jammu and Kashmir shall be permitted... activities prejudicial or detrimental to the State's accession to Pakistan." The pro-independence Jammu and Kashmir Liberation Front has never been allowed to contest elections in Azad Kashmir. While the interim constitution does not give them a choice, the people of Azad Kashmir have not considered any option other than joining Pakistan. Except in a legal sense, Azad Kashmir has been fully integrated into Pakistan. Azad Kashmir is home to a vibrant civil society. One of the organizations active in the territory and inside Pakistan is YFK-International Kashmir Lobby Group, an NGO that seeks better India-Pakistan relations through conflict resolution in Kashmir. Development According to the project report by the Asian Development Bank, the bank has set out development goals for Azad Kashmir in the areas of health, education, nutrition, and social development. The whole project is estimated to cost US$76 million. Germany, between 2006 and 2014, has also donated $38 million towards the AJK Health Infrastructure Programme. Administrative divisions The state is administratively divided into three divisions which, in turn, are divided into ten districts. Demographics Population The population of Azad Kashmir, according to the preliminary results of the 2017 Census, is 4.045 million. The website of the AJK government reports the literacy rate to be 74%, with the enrolment rate in primary school being 98% and 90% for boys and girls respectively. The population of Azad Kashmir is almost entirely Muslim. The people of this region culturally differ from the Kashmiris living in the Kashmir Valley of Jammu and Kashmir and are closer to the culture of Jammu. Mirpur, Kotli, and Bhimber are all old towns of the Jammu region. Religion Azad Jammu and Kashmir has an almost entirely Muslim population. According to data maintained by Christian community organizations, there are around 4,500 Christian residents in the region. Bhimber is home to most of them, followed by Mirpur and Muzaffarabad. A few dozen families also live in Kotli, Poonch, and Bagh. However, the Christian community has been struggling to get residential status and property rights in AJK. There is no official data on the total number of Bahais in AJK. Only six Bahai families are known to be living in Muzaffarabad with others living in rural areas. The followers of the Ahmadi faith are estimated to be somewhere between 20,000 and 25,000, and most of them live in Kotli, Mirpur, Bhimber, and Muzaffarabad. Ethnic groups Most residents of the region are not ethnic Kashmiris. Rather, the majority of people in Azad Kashmir are Pahari people, who are ethnically related to Punjabis. The main communities living in this region are: Gujjars – They are an agricultural tribe and are estimated to be the largest community living in the ten districts of Azad Kashmir. Sudhans – (also known as Sadozai, Sardar) are the second largest tribe, living mainly in the districts of Poonch, Sudhanoti, Bagh, and Kotli in Azad Kashmir, and allegedly originating from the Pashtun areas. Together with the Rajputs, they are the source of most of Azad Kashmir's political leaders. Jats – They are one of the larger communities of AJK and primarily inhabit the districts of Mirpur, Bhimber, and Kotli. A large Mirpuri population lives in the U.K. and it is estimated that more people of Mirpuri origins are now residing in the U.K. than in the Mirpur district, which retains strong ties with the U.K. Rajputs – They are spread across the territory, and they number a little under half a million. Together with the Sundhans, they are the source of most of Azad Kashmir's political class. Mughals – Largely located in the Bagh and Muzaffarabad districts. Awans – A clan with significant numbers in Azad Jammu and Kashmir, living mainly in the Bagh, Poonch, Hattian Bala, and Muzaffarabad. Awans also reside in Punjab and Khyber Pakhtunkhwa in large numbers. Dhund – They are a large clan in Azad Jammu and Kashmir and live mostly in the Bagh, Hattian Bala, and Muzaffarabad districts. They also inhabit Abbottabad and upper Potohar Punjab in large numbers. Kashmiris – Ethnic Kashmiri populations are found in the Neelam Valley and the Leepa Valley (see Kashmiris in Azad Kashmir). The culture of Azad Kashmir has many similarities to that of the northern Punjabi (Potohar) culture in Punjab province, whereas the Sudhans have the oral tradition of the Pashtuns. The Peshawari turban is worn by some Sudhans in the area. The traditional dress of the women is the shalwar kameez in Pahari style. The shalwar kameez is commonly worn by both men and women. Women use a shawl to cover their head and upper body. Languages The official language of Azad Kashmir is Urdu, while English is used in higher domains. The majority of the population, however, are native speakers of other languages. The foremost among these is Pahari–Pothwari with its various dialects. There are also sizeable communities speaking Gujari and Kashmiri as well as pockets of speakers of Kundal Shahi, Shina and Pashto. With the exception of Pashto and English, those languages belong to the Indo-Aryan language family. The dialects of the Pahari-Pothwari language complex cover most of the territory of Azad Kashmir. Those are also spoken across the Line of Control in the neighbouring areas of Indian Jammu and Kashmir and are closely related both to Punjabi to the south and Hinko to the northwest. The language variety in the southern districts of Azad Kashmir is known by a variety of names – including Mirpuri, Pothwari and Pahari – and is closely related to the Pothwari proper spoken to the east in the Pothohar region of Punjab. The dialects of the central districts of Azad Kashmir are occasionally referred to in the literature as Chibhali or Punchi, but the speakers themselves usually call them Pahari, an ambiguous name that is also used for several unrelated languages of the lower Himalayas. Going north, the speech forms gradually change into Hindko. Today, in the Muzaffarabad District the preferred local name for the language is Hindko, although it is still apparently more closely related to the core dialects of Pahari. Further north in the Neelam Valley the dialect, locally also known as Parmi, can more unambiguously be subsumed under Hindko. Another major language of Azad Kashmir is Gujari. It is spoken by several hundred thousand people among the traditionally nomadic Gujars, many of whom are nowadays settled. Not all ethnic Gujars speak Gujari, the proportion of those who have shifted to other languages is probably higher in southern Azad Kashmir. Gujari is most closely related to the Rajasthani languages (particularly Mewati), although it also shares features with Punjabi. It is dispersed over large areas in northern Pakistan and India. Within Pakistan, the Gujari dialects of Azad Kashmir are more similar, in terms of shared basic vocabulary and mutual intelligibility, to the Gujar varieties of the neighbouring Hazara region than to the dialects spoken further to the northwest in Khyber Pakhtunkhwa and north in Gilgit. There are scattered communities of Kashmiri speakers, notably in the Neelam Valley, where they form the second-largest language group after speakers of Hindko. There have been calls for the teaching of Kashmiri (particularly in order to counter India's claim of promoting the culture of Kashmir), but the limited attempts at introducing the language at the secondary school level have not been successful, and it is Urdu, rather than Kashmiri, that Kashmiri Muslims have seen as their identity symbol. There is an ongoing process of gradual shift to larger local languages, but at least in the Neelam Valley there still exist communities for whom Kashmiri is the sole mother tongue. In the northernmost district of Neelam, there are pockets of other languages. Shina, which like Kashmiri belongs to the Dardic group, is present in two distinct varieties spoken altogether in three villages. Pashto, of the Iranian subgroup and the majority language in the neighbouring province of Khyber Pakhtunkhwa, is spoken in two villages in Azad Kashmir, both situated on the Line of Control. The endangered Kundal Shahi is native to the eponymous village and it is the only language not found outside Azad Kashmir. Economy As of 2021, GDP of Azad Jammu and Kashmir was estimated to be 10 billion pounds, giving per capita an income of £5604. Historically the economy of Azad Kashmir has been agricultural which meant that land was the main source or mean of production. This means that all food for immediate and long-term consumption was produced from the land. The produce included various crops, fruits, vegetables, etc. The land was also the source of other livelihood necessities such as wood, fuel, grazing for animals which then turned into dairy products. Because of this land was also the main source of revenue for the governments whose primary purpose for centuries was to accumulate revenue. Agriculture is a major part of Azad Kashmir's economy. Low-lying areas that have high populations grow crops like barley, mangoes, millet, corn (maize), and wheat, and also raise cattle. In the elevated areas that are less populated and more spread out, forestry, corn, and livestock are the main sources of income. There are mineral and marble resources in Azad Kashmir close to Mirpur and Muzaffarabad. There are also graphite deposits at Mohriwali. There are also reservoirs of low-grade coal, chalk, bauxite, and zircon. Local household industries produce carved wooden objects, textiles, and dhurrie carpets. There is also an arts and crafts industry that produces such cultural goods as namdas, shawls, pashmina, pherans, Papier-mâché, basketry copper, rugs, wood carving, silk and woolen clothing, patto, carpets, namda gubba, and silverware. Agricultural goods produced in the region include mushrooms, honey, walnuts, apples, cherries, medicinal herbs and plants, resin, deodar, kail, chir, fir, maple, and ash timber. The migration to the UK was accelerated and by the completion of Mangla Dam in 1967 the process of 'chain migration' became in full flow. Today, remittances from British Mirpuri community make a critical role in AJK's economy. In the mid-1950s various economic and social development processes were launched in Azad Kashmir. In the 1960s, with the construction of the Mangla Dam in Mirpur District, the Azad Jammu and Kashmir Government began to receive royalties from the Pakistani government for the electricity that the dam provided to Pakistan. During the mid-2000s, a multibillion-dollar reconstruction began in the aftermath of the 2005 Kashmir earthquake. In addition to agriculture, textiles, and arts and crafts, remittances have played a major role in the economy of Azad Kashmir. One analyst estimated that the figure for Azad Kashmir was 25.1% in 2001. With regard to annual household income, people living in the higher areas are more dependent on remittances than are those living in the lower areas. In the latter part of 2006, billions of dollars for development were mooted by international aid agencies for the reconstruction and rehabilitation of earthquake-hit zones in Azad Kashmir, though much of that amount was subsequently lost in bureaucratic channels, leading to considerable delays in help getting to the neediest. Hundreds of people continued to live in tents long after the earthquake. A land-use plan for the city of Muzaffarabad was prepared by the Japan International Cooperation Agency. Tourist destinations in the area include the following: Muzaffarabad, the capital city of Azad Kashmir, is located on the banks of the Jhelum and Neelum rivers. It is from Rawalpindi and Islamabad. Well-known tourist spots near Muzaffarabad are the Red Fort, Pir Chinassi, Patika, Subri Lake and Awan Patti. The Neelam Valley is situated to the north and northeast of Muzaffarabad, The gateway to the valley. The main tourist attractions in the valley are Athmuqam, Kutton, Keran, Changan, Sharda, Kel, Arang Kel and Taobat. Sudhanoti is one of the eight districts of Azad Kashmir in Pakistan. Sudhanoti is located away from Islamabad, the Capital of Pakistan. It is connected with Rawalpindi and Islamabad through Azad Pattan road. Rawalakot city is the headquarters of Poonch District and is located from Islamabad. Tourist attractions in Poonch District are Banjosa Lake, Devi Gali, Tatta Pani, and Toli Pir. Bagh city, the headquarters of Bagh District, is from Islamabad and from Muzaffarabad. The principal tourist attractions in Bagh District are Bagh Fort, Dhirkot, Sudhan Gali, Ganga Lake, Ganga Choti, Kotla Waterfall, Neela Butt, Danna, Panjal Mastan National Park, and Las Danna. The Leepa Valley is located southeast of Muzaffarabad. It is the most charming and scenic place for tourists in Azad Kashmir. New Mirpur City is the headquarters of Mirpur District. The main tourist attractions near New Mirpur City are the Mangla Lake and Ramkot Fort. Education The literacy rate in Azad Kashmir was 62% in 2004, higher than in any other region of Pakistan. The current literacy rate of Azad Kashmir is 76.60% in 2018. And it remained at 79.80% in 2019. According to the 2020–2021 census, the literacy rate in Azad Kashmir was 91.34% However, only 2.2% were graduates, compared to the average of 2.9% for Pakistan. Universities The following is a list of universities recognised by Higher Education Commission of Pakistan (HEC): * Granted university status. Cadet College Pallandri Cadet College Palandri is situated about from Islamabad Medical colleges The following is a list of undergraduate medical institutions recognised by Pakistan Medical and Dental Council (PMDC) . Mohtarma Benazir Bhutto Shaheed Medical College in Mirpur Azad Jammu Kashmir Medical College in Muzafarabad Poonch Medical College in Rawalakot Private medical colleges Mohi-ud-Din Islamic Medical College in Mirpur Sports Football, cricket, and volleyball are very popular in Azad Kashmir. Many tournaments are also held throughout the year and in the holy month of Ramazan, night-time flood-lit tournaments are also organised. Azad Kashmir has its own T20 tournament called the Kashmir Premier League, which started in 2021. New Mirpur City has a cricket stadium (Quaid-e-Azam Stadium) which has been taken over by the Pakistan Cricket Board for renovation to bring it up to the international standards. There is also a cricket stadium in Muzaffarabad with a capacity of 8,000 people. This stadium has hosted 8 matches of the Inter-District Under 19 Tournament 2013. There are also registered football clubs: Pilot Football Club Youth Football Club Kashmir National FC Azad Super FC Culture Tourism See also 1941 Census of Jammu and Kashmir Kashmir conflict Tourism in Azad Kashmir List of cultural heritage sites in Azad Kashmir Notes References Sources Further reading External links Planning & Development Department AJ&K AJ&K Planning and Development Department AJ&K Tourism & Archaeology Department Tourism in Azad Kashmir Disputed territories in Asia Foreign relations of Pakistan States and territories established in 1947 Subdivisions of Pakistan Territorial disputes of India 2005 Kashmir earthquake Urdu-speaking countries and territories Kashmiri-speaking countries and territories

2747

https://en.wikipedia.org/wiki/Arabian%20Sea

Arabian Sea

The Arabian Sea () is a region of the northern Indian Ocean bounded on the north by Pakistan, Iran and the Gulf of Oman, on the west by the Gulf of Aden, Guardafui Channel and the Arabian Peninsula, on the southeast by the Laccadive Sea and the Maldives, on the southwest by Somalia, and on the east by India. Its total area is 3,862,000 km2 (1,491,000 sq mi) and its maximum depth is 4,652 meters (15,262 ft). The Gulf of Aden in the west connects the Arabian Sea to the Red Sea through the strait of Bab-el-Mandeb, and the Gulf of Oman is in the northwest, connecting it to the Persian Gulf. Geography The Arabian Sea's surface area is about . The maximum width of the sea is approximately , and its maximum depth is . The biggest river flowing into the sea is the Indus River. The Arabian Sea has two important branches — the Gulf of Aden in the southwest, connecting with the Red Sea through the strait of Bab-el-Mandeb; and the Gulf of Oman to the northwest, connecting with the Persian Gulf. There are also the gulfs of Khambhat and Kutch on the Indian Coast. The Arabian Sea has been crossed by many important marine trade routes since the 3rd or 2nd millennium BCE. Major seaports include Kandla Port, Mundra Port, Pipavav Port, Dahej Port, Hazira Port, Mumbai Port, Nhava Sheva Port (Navi Mumbai), Mormugão Port (Goa), New Mangalore Port and Kochi Port in India, the Port of Karachi, Port Qasim, and the Gwadar Port in Pakistan, Chabahar Port in Iran and the Port of Salalah in Salalah, Oman. The largest islands in the Arabian Sea include Socotra (Yemen), Masirah Island (Oman), Lakshadweep (India) and Astola Island (Pakistan). The countries with coastlines on the Arabian Sea are Yemen, Oman, Pakistan, Iran, India and the Maldives. Limits The International Hydrographic Organization defines the limits of the Arabian Sea as follows: On the west: the eastern limit of the Gulf of Aden. On the north: a line joining Ràs al Hadd, east point of the Arabian Peninsula (22°32'N) and Ràs Jiyùni (61°43'E) on the coast of Pakistan. On the south: a line running from the southern extremity of Addu Atoll in the Maldives, to the eastern extremity of Ràs Hafun (the easternmost point of Africa, 10°26'N). On the east: the western limit of the Laccadive Sea a line running from Sadashivgad on the west coast of India () to Cora Divh () and thence down the west side of the Laccadive and Maldive archipelagos to the most southerly point of Addu Atoll in the Maldives. Border and Basin countries Border and Basin countries: - 2,500 km coastline - 1,050 km coastline Alternative names The Arabian Sea historically and geographically has been referred to with different names by Arabian and European geographers and travelers, including Erythraean Sea, Indian Sea, Oman sea, Erythraean , Persian Sea in para No 34-35 of the Voyage In Indian folklore, it is referred to as Darya, Sindhu Sagar, and Arab Samudra. Arab geographers, sailors and nomads used to call this sea by different names, including the Akhzar (Green) Sea, Bahre Fars (Persian Sea), the Ocean Sea, the Hindu sea, the Makran Sea, the sea of Oman, among them the Zakariya al-Qazwini, Al-Masudi, Ibn Hawqal and (Hafiz-i Abru) They wrote: "The green sea and Indian sea and Persian sea are all one sea and in this sea there are strange creatures." in Iran and Turky people call it Oman sea. In the Periplus of the Erythraean Sea , as well as in some ancient maps, Erythraean Sea refers to the whole area of the northwestern Indian Ocean, including the Arabian Sea. Trade routes The Arabian Sea has been an important marine trade route since the era of the coastal sailing vessels from possibly as early as the 3rd millennium BCE, certainly the late 2nd millennium BCE through the later days known as the Age of Sail. By the time of Julius Caesar, several well-established combined land-sea trade routes depended upon water transport through the sea around the rough inland terrain features to its north. These routes usually began in the Far East or down river from Madhya Pradesh, India with transshipment via historic Bharuch (Bharakuccha), traversed past the inhospitable coast of modern-day Iran, then split around Hadhramaut, Yemen into two streams north into the Gulf of Aden and thence into the Levant, or south into Alexandria via Red Sea ports such as Axum. Each major route involved transhipping to pack animal caravan, travel through desert country and risk of bandits and extortionate tolls by local potentates. This southern coastal route past the rough country in the southern Arabian Peninsula was significant, and the Egyptian Pharaohs built several shallow canals to service the trade, one more or less along the route of today's Suez Canal, and another from the Red Sea to the Nile River, both shallow works that were swallowed up by huge sand storms in antiquity. Later the kingdom of Axum arose in Ethiopia to rule a mercantile empire rooted in the trade with Europe via Alexandria. Major ports Jawaharlal Nehru Port in Mumbai is the largest port in the Arabian Sea, and the largest container port in India. Major Indian ports in the Arabian Sea are Mundra Port, Kandla Port, Nava Sheva, Kochi Port, Mumbai Port, and Mormugão. The Port of Karachi, Pakistan's largest and busiest seaport lies on the coast of the sea. It is located between the Karachi towns of Kiamari and Saddar. The Gwadar Port of Pakistan is a warm-water, deep-sea port situated at Gwadar in Balochistan at the apex of the Arabian Sea and at the entrance of the Persian Gulf, about 460 km west of Karachi and approximately 75 km (47 mi) east of Pakistan's border with Iran. The port is located on the eastern bay of a natural hammerhead-shaped peninsula jutting out into the Arabian Sea from the coastline. Port of Salalah in Salalah, Oman is also a major port in the area. The International Task Force often uses the port as a base. There is a significant number of warships of all nations coming in and out of the port, which makes it a very safe bubble. The port handled just under 3.5m teu in 2009. Islands There are several islands in the Arabian Sea, with the most important ones being Lakshadweep Islands (India), Socotra (Yemen), Masirah (Oman) and Astola Island (Pakistan). The Lakshadweep Islands (formerly known as the Laccadive, Minicoy, and Aminidivi Islands) is a group of islands in the Laccadive Sea region of Arabian Sea, 200 to 440 km (120 to 270 mi) off the southwestern coast of India. The archipelago is a union territory and is governed by the Union Government of India. The islands form the smallest union territory of India with their total surface area being just . The islands are the northernmost of the Lakshadweep-Maldives-Chagos group of islands. Astola Island, also known as Jezira Haft Talar in Balochi, or 'Island of the Seven Hills', is a small, uninhabited island in the northern tip of the Arabian Sea in Pakistan's territorial waters. Socotra, also spelled Soqotra, is the largest island, being part of a small archipelago of four islands. It lies some east of the Horn of Africa and south of the Arabian Peninsula. Masirah is an island off the east coast of Oman. Oxygen Minimum Zone The Arabian Sea has one of the world's three largest oceanic oxygen minimum zones (OMZ), or “dead zones,” along with the eastern tropical North Pacific and the eastern tropical South Pacific. OMZs have very low levels of oxygen, sometimes undetectable by standard equipment. The Arabian Sea's OMZ has the lowest levels of oxygen in the world, especially in the Gulf of Oman. Causes of the OMZ may include untreated sewage as well as high temperatures on the Indian subcontinent, which increase winds blowing towards India, bringing up nutrients and reducing oxygen in the Arabian Sea's waters. In winter, phytoplankton suited to low-oxygen conditions turn the OMZ bright green. Environment and wildlife The wildlife of the Arabian sea is diverse, and entirely unique because of the geographic distribution. Underwater tunnel A rail tunnel under the sea is planned. It will link the UAE with the western coast of India. The tunnel will be supported by pontoons and will be nearly 2000 kilometres in length. See also Indian Ocean Rim Association North Indian Ocean tropical cyclone Piracy off the coast of Somalia References Sources Documents on the Persian Gulf's name A book and Atlas External links Arabian Sea (World Wildlife Fund) Arabian Peninsula Marine ecoregions India–Pakistan border Oman–Yemen border Bodies of water of Pakistan Bodies of water of India Bodies of water of Oman Seas of Yemen Seas of Iran Bodies of water of Somalia Bodies of water of Iran Bodies of water of the Maldives Seas of the Indian Ocean Seas of Asia

2752

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

Aspartame

Aspartame is an artificial non-saccharide sweetener 200 times sweeter than sucrose, and is commonly used as a sugar substitute in foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide with the trade names NutraSweet, Equal, and Canderel. Aspartame was first made in 1965 and approved for use in food products by the United States Food and Drug Administration (FDA) in 1981. Aspartame is one of the most rigorously tested food ingredients. Reviews by over 100 governmental regulatory bodies found the ingredient safe for consumption at current levels. As of 2018, several reviews of clinical trials showed that using aspartame in place of sugar reduces calorie intake and body weight in adults and children. Uses Aspartame is around 180 to 200 times sweeter than sucrose (table sugar). Due to this property, even though aspartame produces of energy per gram when metabolized, the quantity of aspartame needed to produce a sweet taste is so small that its caloric contribution is negligible. The taste of aspartame and other artificial sweeteners differs from that of table sugar in the times of onset and how long the sweetness lasts, though aspartame comes closest to sugar's taste profile among approved artificial sweeteners. The sweetness of aspartame lasts longer than that of sucrose, so it is often blended with other artificial sweeteners such as acesulfame potassium to produce an overall taste more like that of sugar. Like many other peptides, aspartame may hydrolyze (break down) into its constituent amino acids under conditions of elevated temperature or high pH. This makes aspartame undesirable as a baking sweetener, and prone to degradation in products hosting a high pH, as required for a long shelf life. The stability of aspartame under heating can be improved to some extent by encasing it in fats or in maltodextrin. The stability when dissolved in water depends markedly on pH. At room temperature, it is most stable at pH 4.3, where its half-life is nearly 300 days. At pH 7, however, its half-life is only a few days. Most soft-drinks have a pH between 3 and 5, where aspartame is reasonably stable. In products that may require a longer shelf life, such as syrups for fountain beverages, aspartame is sometimes blended with a more stable sweetener, such as saccharin. Descriptive analyses of solutions containing aspartame report a sweet aftertaste as well as bitter and off-flavor aftertastes. In products such as powdered beverages, the amine in aspartame can undergo a Maillard reaction with the aldehyde groups present in certain aroma compounds. The ensuing loss of both flavor and sweetness can be prevented by protecting the aldehyde as an acetal. Safety and health effects The safety of aspartame has been studied since its discovery and it is one of the most rigorously tested food ingredients. Aspartame has been deemed safe for human consumption by over 100 regulatory agencies in their respective countries, including the United States Food and Drug Administration (FDA), UK Food Standards Agency, the European Food Safety Authority (EFSA), Health Canada, Australia, and New Zealand. reviews of clinical trials showed that using aspartame (or other non-nutritive sweeteners) in place of sugar reduces calorie intake and body weight in adults and children. A 2017 review of metabolic effects by consuming aspartame found that it did not affect blood glucose, insulin, total cholesterol, triglycerides, calorie intake, or body weight. While high-density lipoprotein levels were higher compared to control, they were lower compared to sucrose. Phenylalanine High levels of the naturally occurring essential amino acid phenylalanine are a health hazard to those born with phenylketonuria (PKU), a rare inherited disease that prevents phenylalanine from being properly metabolized. Because aspartame contains a small amount of phenylalanine, foods containing aspartame sold in the United States must state: "Phenylketonurics: Contains Phenylalanine" on product labels. In the UK, foods that contain aspartame are required by the Food Standards Agency to list the substance as an ingredient, with the warning, "Contains a source of phenylalanine". Manufacturers are also required to print "with sweetener(s)" on the label close to the main product name on foods that contain "sweeteners such as aspartame" or "with sugar and sweetener(s)" on "foods that contain both sugar and sweetener". In Canada, foods that contain aspartame are required to list aspartame among the ingredients, include the amount of aspartame per serving, and state that the product contains phenylalanine. Phenylalanine is one of the essential amino acids and is required for normal growth and maintenance of life. Concerns about the safety of phenylalanine from aspartame for those without phenylketonuria center largely on hypothetical changes in neurotransmitter levels as well as ratios of neurotransmitters to each other in the blood and brain that could lead to neurological symptoms. Reviews of the literature have found no consistent findings to support such concerns, and while high doses of aspartame consumption may have some biochemical effects, these effects are not seen in toxicity studies to suggest aspartame can adversely affect neuronal function. As with methanol and aspartic acid, common foods in the typical diet such as milk, meat, and fruits, will lead to ingestion of significantly higher amounts of phenylalanine than would be expected from aspartame consumption. Cancer Reviews have found no association between aspartame and cancer. This position is supported by multiple regulatory agencies like the FDA and EFSA as well as scientific bodies such as the National Cancer Institute. The EFSA, FDA, and the US National Cancer Institute state that aspartame is safe for human consumption. Neurotoxicity symptoms Reviews found no evidence that low doses of aspartame would plausibly lead to neurotoxic effects. A review of studies on children did not show any significant findings for safety concerns with regard to neuropsychiatric conditions such as panic attacks, mood changes, hallucinations, ADHD, or seizures by consuming aspartame. Headaches Headaches are the most common symptom reported by consumers. While one small review noted aspartame is likely one of many dietary triggers of migraines, in a list that includes "cheese, chocolate, citrus fruits, hot dogs, monosodium glutamate, aspartame, fatty foods, ice cream, caffeine withdrawal, and alcoholic drinks, especially red wine and beer," other reviews have noted conflicting studies about headaches and other studies lack any evidence and references to support this claim. Mechanism of action The perceived sweetness of aspartame (and other sweet substances like acesulfame K) in humans is due to its binding of the heterodimer G protein-coupled receptor formed by the proteins TAS1R2 and TAS1R3. Aspartame is not recognized by rodents due to differences in the taste receptors. Metabolites Aspartame is rapidly hydrolyzed in the small intestines. Even with ingestion of very high doses of aspartame (over 200 mg/kg), no aspartame is found in the blood due to the rapid breakdown. Upon ingestion, aspartame breaks down into residual components, including aspartic acid, phenylalanine, methanol, and further breakdown products including formaldehyde and formic acid. Human studies show that formic acid is excreted faster than it is formed after ingestion of aspartame. In some fruit juices, higher concentrations of methanol can be found than the amount produced from aspartame in beverages. Aspartame's major decomposition products are its cyclic dipeptide (in a 2,5-Diketopiperazine, or DKP, form), the non-esterified dipeptide (aspartylphenylalanine), and its constituent components, phenylalanine, aspartic acid, and methanol. At 180 °C, aspartame undergoes decomposition to form a diketopiperazine derivative. Aspartate Aspartic acid (aspartate) is one of the most common amino acids in the typical diet. As with methanol and phenylalanine, intake of aspartic acid from aspartame is less than would be expected from other dietary sources. At the 90th percentile of intake, aspartame provides only between 1% and 2% of the daily intake of aspartic acid. There has been some speculation that aspartame, in conjunction with other amino acids like glutamate, may lead to excitotoxicity, inflicting damage on brain and nerve cells. However, clinical studies have shown no signs of neurotoxic effects, and studies of metabolism suggest it is not possible to ingest enough aspartic acid and glutamate through food and drink to levels that would be expected to be toxic. Methanol The methanol produced by the metabolism of aspartame is absorbed and quickly converted into formaldehyde and then completely oxidized to formic acid. The methanol from aspartame is unlikely to be a safety concern for several reasons. Fruit juices and citrus fruits contain methanol, and there are other dietary sources for methanol such as fermented beverages and the amount of methanol produced from aspartame-sweetened foods and beverages is likely to be less than that from these and other sources that are already in people's diets. With regard to formaldehyde, it is rapidly converted in the body, and the amounts of formaldehyde from the metabolism of aspartame are trivial when compared to the amounts produced routinely by the human body and from other foods and drugs. At the highest expected human doses of consumption of aspartame, there are no increased blood levels of methanol or formic acid, and ingesting aspartame at the 90th percentile of intake would produce 25 times less methanol than what would be considered toxic. Complete Biochemistry Pathway Chemistry Aspartame is a methyl ester of the dipeptide of the natural amino acids L-aspartic acid and L-phenylalanine. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in free amino acids. While known aspects of synthesis are covered by patents, many details are proprietary. Two approaches to synthesis are used commercially. In the chemical synthesis, the two carboxyl groups of aspartic acid are joined into an anhydride, and the amino group is protected with a formyl group as the formamide, by treatment of aspartic acid with a mixture of formic acid and acetic anhydride. Phenylalanine is converted to its methyl ester and combined with the N-formyl aspartic anhydride; then the protecting group is removed from aspartic nitrogen by acid hydrolysis. The drawback of this technique is that a byproduct, the bitter-tasting β-form, is produced when the wrong carboxyl group from aspartic acid anhydride links to phenylalanine, with desired and undesired isomer forming in a 4:1 ratio. A process using an enzyme from Bacillus thermoproteolyticus to catalyze the condensation of the chemically altered amino acids will produce high yields without the β-form byproduct. A variant of this method, which has not been used commercially, uses unmodified aspartic acid, but produces low yields. Methods for directly producing aspartyl-phenylalanine by enzymatic means, followed by chemical methylation, have also been tried, but not scaled for industrial production. Intake The acceptable daily intake (ADI) value for aspartame, as well as other food additives studied, is defined as the "amount of a food additive, expressed on a body weight basis, that can be ingested daily over a lifetime without appreciable health risk." The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Commission's Scientific Committee on Food has determined this value is 40 mg/kg of body weight for aspartame, while FDA has set its ADI for aspartame at 50 mg/kg. The primary source for exposure to aspartame in the United States is diet soft drinks, though it can be consumed in other products, such as pharmaceutical preparations, fruit drinks, and chewing gum among others in smaller quantities. A 12 US fluid ounce (355 ml) can of diet soda contains of aspartame, and for a adult, it takes approximately 21 cans of diet soda daily to consume the of aspartame that would surpass the FDA's 50 milligrams per kilogram of body weight ADI of aspartame from diet soda alone. Reviews have analyzed studies which have looked at the consumption of aspartame in countries worldwide, including the United States, countries in Europe, and Australia, among others. These reviews have found that even the high levels of intake of aspartame, studied across multiple countries and different methods of measuring aspartame consumption, are well below the ADI for safe consumption of aspartame. Reviews have also found that populations that are believed to be especially high consumers of aspartame such as children and diabetics are below the ADI for safe consumption, even considering extreme worst-case scenario calculations of consumption. In a report released on 10 December 2013, the EFSA said that, after an extensive examination of evidence, it ruled out the "potential risk of aspartame causing damage to genes and inducing cancer," and deemed the amount found in diet sodas safe to consume. History Aspartame was discovered in 1965 by James M. Schlatter, a chemist working for G.D. Searle & Company. Schlatter had synthesized aspartame as an intermediate step in generating a tetrapeptide of the hormone gastrin, for use in assessing an anti-ulcer drug candidate. He discovered its sweet taste when he licked his finger, which had become contaminated with aspartame, to lift up a piece of paper. Torunn Atteraas Garin participated in the development of aspartame as an artificial sweetener. In 1975, prompted by issues regarding Flagyl and Aldactone, a US FDA task force team reviewed 25 studies submitted by the manufacturer, including 11 on aspartame. The team reported "serious deficiencies in Searle's operations and practices". The FDA sought to authenticate 15 of the submitted studies against the supporting data. In 1979, the Center for Food Safety and Applied Nutrition (CFSAN) concluded, since many problems with the aspartame studies were minor and did not affect the conclusions, the studies could be used to assess aspartame's safety. In 1980, the FDA convened a Public Board of Inquiry (PBOI) consisting of independent advisors charged with examining the purported relationship between aspartame and brain cancer. The PBOI concluded aspartame does not cause brain damage, but it recommended against approving aspartame at that time, citing unanswered questions about cancer in laboratory rats. In 1983, the FDA approved aspartame for use in carbonated beverages, and for use in other beverages, baked goods, and confections in 1993. In 1996, the FDA removed all restrictions from aspartame, allowing it to be used in all foods. Several European Union countries approved aspartame in the 1980s, with EU-wide approval in 1994. The European Commission Scientific Committee on Food reviewed subsequent safety studies and reaffirmed the approval in 2002. The European Food Safety Authority reported in 2006 that the previously established Acceptable daily intake was appropriate, after reviewing yet another set of studies. Compendial status British Pharmacopoeia United States Pharmacopeia Commercial uses Under the trade names Equal, NutraSweet, and Canderel, aspartame is an ingredient in approximately 6,000 consumer foods and beverages sold worldwide, including (but not limited to) diet sodas and other soft drinks, instant breakfasts, breath mints, cereals, sugar-free chewing gum, cocoa mixes, frozen desserts, gelatin desserts, juices, laxatives, chewable vitamin supplements, milk drinks, pharmaceutical drugs and supplements, shake mixes, tabletop sweeteners, teas, instant coffees, topping mixes, wine coolers and yogurt. It is provided as a table condiment in some countries. Aspartame is less suitable for baking than other sweeteners, because it breaks down when heated and loses much of its sweetness. NutraSweet Company In 1985, Monsanto Company bought G.D.Searle, and the aspartame business became a separate Monsanto subsidiary, the NutraSweet Company. In March 2000, Monsanto sold it to J.W. Childs Equity Partners II L.P. European use patents on aspartame expired starting in 1987, and the US patent expired in 1992. Since then, the company has competed for market share with other manufacturers, including Ajinomoto, Merisant and the Holland Sweetener Company. Ajinomoto Many aspects of industrial synthesis of aspartame were established by Ajinomoto. In 2004, the market for aspartame, in which Ajinomoto, the world's largest aspartame manufacturer, had a 40 percent share, was 14,000 metric tons a year, and consumption of the product was rising by 2 percent a year. Ajinomoto acquired its aspartame business in 2000 from Monsanto for $67M. In 2008, Ajinomoto sued British supermarket chain Asda, part of Walmart, for a malicious falsehood action concerning its aspartame product when the substance was listed as excluded from the chain's product line, along with other "nasties". In July 2009, a British court found in favour of Asda. In June 2010, an appeals court reversed the decision, allowing Ajinomoto to pursue a case against Asda to protect aspartame's reputation. Asda said that it would continue to use the term "no nasties" on its own-label products, but the suit was settled in 2011 with Asda choosing to remove references to aspartame from its packaging. In November 2009, Ajinomoto announced a new brand name for its aspartame sweetener – AminoSweet. Holland Sweetener Company A joint venture of DSM and Tosoh, the Holland Sweetener Company manufactured aspartame using the enzymatic process developed by Toyo Soda (Tosoh) and sold as the brand Sanecta. Additionally, they developed a combination aspartame-acesulfame salt under the brand name Twinsweet. They left the sweetener industry in late 2006, because "global aspartame markets are facing structural oversupply, which has caused worldwide strong price erosion over the last five years", making the business "persistently unprofitable". Competing products Because sucralose, unlike aspartame, retains its sweetness after being heated, and has at least twice the shelf life of aspartame, it has become more popular as an ingredient. This, along with differences in marketing and changing consumer preferences, caused aspartame to lose market share to sucralose. In 2004, aspartame traded at about $30/kg and sucralose, which is roughly three times sweeter by weight, at around $300/kg. See also Aspartame controversy Phenylalanine ammonia lyase Stevia References External links Amino acid derivatives Aromatic compounds Butyramides Dipeptides Carboxylate esters Sugar substitutes Methyl esters E-number additives

2753

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

AutoCAD

AutoCAD is a commercial computer-aided design (CAD) and drafting software application. Developed and marketed by Autodesk, AutoCAD was first released in December 1982 as a desktop app running on microcomputers with internal graphics controllers. Before AutoCAD was introduced, most commercial CAD programs ran on mainframe computers or minicomputers, with each CAD operator (user) working at a separate graphics terminal. AutoCAD is also available as mobile and web apps. AutoCAD is used in industry, by architects, project managers, engineers, graphic designers, city planners and other professionals. It was supported by 750 training centers worldwide in 1994. Introduction AutoCAD was derived from a program that began in 1977, and then released in 1979 called Interact CAD, also referred to in early Autodesk documents as MicroCAD, which was written prior to Autodesk's (then Marinchip Software Partners) formation by Autodesk cofounder Michael Riddle. The first version by Autodesk was demonstrated at the 1982 Comdex and released that December. AutoCAD supported CP/M-80 computers. As Autodesk's flagship product, by March 1986 AutoCAD had become the most ubiquitous CAD program worldwide. The 2022 release marked the 36th major release of AutoCAD for Windows and the 12th consecutive year of AutoCAD for Mac. The native file format of AutoCAD is .dwg. This and, to a lesser extent, its interchange file format DXF, have become de facto, if proprietary, standards for CAD data interoperability, particularly for 2D drawing exchange. AutoCAD has included support for .dwf, a format developed and promoted by Autodesk, for publishing CAD data. File formats Filename extensions AutoCAD's native file formats are denoted either by a .dwg, .dwt, .dws, or .dxf filename extension. The primary file format for 2D and 3D drawing files created with AutoCAD is .dwg. While other third-party CAD software applications can create .dwg files, AutoCAD uniquely creates RealDWG files. Using AutoCAD, any .dwg file may be saved to a derivative format. These derivative formats include: Drawing Template Files .dwt: New .dwg are created from a .dwt file. Although the default template file is acad.dwt for AutoCAD and acadlt.dwt for AutoCAD LT, custom .dwt files may be created to include foundational configurations such as drawing units and layers. Drawing Standards File .dws: Using the CAD Standards feature of AutoCAD, a Drawing Standards File may be associated to any .dwg or .dwt file to enforce graphical standards. Drawing Interchange Format .dxf: The .dxf format is an ASCII representation of a .dwg file, and is used to transfer data between various applications. Features Compatibility with other software ESRI ArcMap 10 permits export as AutoCAD drawing files. Civil 3D permits export as AutoCAD objects and as LandXML. Third-party file converters exist for specific formats such as Bentley MX GENIO Extension, PISTE Extension (France), ISYBAU (Germany), OKSTRA and Microdrainage (UK); also, conversion of .pdf files is feasible, however, the accuracy of the results may be unpredictable or distorted. For example, jagged edges may appear. Several vendors provide online conversions for free such as Cometdocs. Language AutoCAD and AutoCAD LT are available for English, German, French, Italian, Spanish, Japanese, Korean, Chinese Simplified, Chinese Traditional, Brazilian Portuguese, Russian, Czech, Polish and Hungarian (also through additional language packs). The extent of localization varies from full translation of the product to documentation only. The AutoCAD command set is localized as a part of the software localization. Extensions AutoCAD supports a number of APIs for customization and automation. These include AutoLISP, Visual LISP, VBA, .NET and ObjectARX. ObjectARX is a C++ class library, which was also the base for: products extending AutoCAD functionality to specific fields creating products such as AutoCAD Architecture, AutoCAD Electrical, AutoCAD Civil 3D third-party AutoCAD-based application There are a large number of AutoCAD plugins (add-on applications) available on the application store Autodesk Exchange Apps. AutoCAD's DXF, drawing exchange format, allows importing and exporting drawing information. Vertical integration Autodesk has also developed a few vertical programs for discipline-specific enhancements such as: Advance Steel AutoCAD Architecture AutoCAD Electrical AutoCAD Map 3D AutoCAD Mechanical AutoCAD MEP AutoCAD Plant 3D Autodesk Civil 3D Since AutoCAD 2019 several verticals are included with AutoCAD subscription as Industry-Specific Toolset. For example, AutoCAD Architecture (formerly Architectural Desktop) permits architectural designers to draw 3D objects, such as walls, doors, and windows, with more intelligent data associated with them rather than simple objects, such as lines and circles. The data can be programmed to represent specific architectural products sold in the construction industry, or extracted into a data file for pricing, materials estimation, and other values related to the objects represented. Additional tools generate standard 2D drawings, such as elevations and sections, from a 3D architectural model. Similarly, Civil Design, Civil Design 3D, and Civil Design Professional support data-specific objects facilitating easy standard civil engineering calculations and representations. Softdesk Civil was developed as an AutoCAD add-on by a company in New Hampshire called Softdesk (originally DCA). Softdesk was acquired by Autodesk, and Civil became Land Development Desktop (LDD), later renamed Land Desktop. Civil 3D was later developed and Land Desktop was retired. Variants AutoCAD LT AutoCAD LT is the lower-cost version of AutoCAD, with reduced capabilities, first released in November 1993. Autodesk developed AutoCAD LT to have an entry-level CAD package to compete in the lower price level. Priced at $495, it became the first AutoCAD product priced below $1000. It was sold directly by Autodesk and in computer stores unlike the full version of AutoCAD, which must be purchased from official Autodesk dealers. AutoCAD LT 2015 introduced Desktop Subscription service from $360 per year; as of 2018, three subscription plans were available, from $50 a month to a 3-year, $1170 license. While there are hundreds of small differences between the full AutoCAD package and AutoCAD LT, there are a few recognized major differences in the software's features: 3D capabilities: AutoCAD LT lacks the ability to create, visualize and render 3D models as well as 3D printing. Network licensing: AutoCAD LT cannot be used on multiple machines over a network. Customization: AutoCAD LT does not support customization with LISP, ARX, .NET and VBA. Management and automation capabilities with Sheet Set Manager and Action Recorder. CAD standards management tools. AutoCAD Mobile and AutoCAD Web AutoCAD Mobile and AutoCAD Web (formerly AutoCAD WS and AutoCAD 360) is an account-based mobile and web application enabling registered users to view, edit, and share AutoCAD files via mobile device and web using a limited AutoCAD feature set — and using cloud-stored drawing files. The program, which is an evolution and combination of previous products, uses a freemium business model with a free plan and two paid levels, including various amounts of storage, tools, and online access to drawings. 360 includes new features such as a "Smart Pen" mode and linking to third-party cloud-based storage such as Dropbox. Having evolved from Flash-based software, AutoCAD Web uses HTML5 browser technology available in newer browsers including Firefox and Google Chrome. AutoCAD WS began with a version for the iPhone and subsequently expanded to include versions for the iPod Touch, iPad, Android phones, and Android tablets. Autodesk released the iOS version in September 2010, following with the Android version on April 20, 2011. The program is available via download at no cost from the App Store (iOS), Google Play (Android) and Amazon Appstore (Android). In its initial iOS version, AutoCAD WS supported drawing of lines, circles, and other shapes; creation of text and comment boxes; and management of color, layer, and measurements — in both landscape and portrait modes. Version 1.3, released August 17, 2011, added support for unit typing, layer visibility, area measurement and file management. The Android variant includes the iOS feature set along with such unique features as the ability to insert text or captions by voice command as well as manually. Both Android and iOS versions allow the user to save files on-line — or off-line in the absence of an Internet connection. In 2011, Autodesk announced plans to migrate the majority of its software to "the cloud", starting with the AutoCAD WS mobile application. According to a 2013 interview with Ilai Rotbaein, an AutoCAD WS product manager for Autodesk, the name AutoCAD WS had no definitive meaning, and was interpreted variously as Autodesk Web Service, White Sheet or Work Space. In 2013, AutoCAD WS was renamed to AutoCAD 360. Later, it was renamed to AutoCAD Web App. Student versions AutoCAD is licensed, for free, to students, educators, and educational institutions, with a 12-month renewable license available. Licenses acquired before March 25, 2020 were a 36-month license, with its last renovation on March 24, 2020. The student version of AutoCAD is functionally identical to the full commercial version, with one exception: DWG files created or edited by a student version have an internal bit-flag set (the "educational flag"). When such a DWG file is printed by any version of AutoCAD (commercial or student) older than AutoCAD 2014 SP1 or AutoCAD 2019 and newer, the output includes a plot stamp/banner on all four sides. Objects created in the Student Version cannot be used for commercial use. Student Version objects "infect" a commercial version DWG file if they are imported in versions older than AutoCAD 2015 or newer than AutoCAD 2018. Ports Windows AutoCAD Release 12 in 1992 was the first version of the software to support the Windows platform - in that case Windows 3.1. After Release 14 in 1997, support for MS-DOS, Unix and Macintosh were dropped, and AutoCAD was exclusively Windows supported. In general any new AutoCAD version supports the current Windows version and some older ones. AutoCAD 2016 to 2020 support Windows 7 up to Windows 10. Mac Autodesk stopped supporting Apple's Macintosh computers in 1994. Over the next several years, no compatible versions for the Mac were released. In 2010 Autodesk announced that it would once again support Apple's Mac OS X software in the future. Most of the features found in the 2012 Windows version can be found in the 2012 Mac version. The main difference is the user interface and layout of the program. The interface is designed so that users who are already familiar with Apple's macOS software will find it similar to other Mac applications. Autodesk has also built-in various features in order to take full advantage of Apple's Trackpad capabilities as well as the full-screen mode in Apple's OS X Lion. AutoCAD 2012 for Mac supports both the editing and saving of files in DWG formatting that will allow the file to be compatible with other platforms besides the OS X. AutoCAD 2019 for Mac requires Mac OS X 10.11 (El Capitan) or later. AutoCAD LT 2013 was available through the Mac App Store for $899.99. The full-featured version of AutoCAD 2013 for Mac, however, wasn't available through the Mac App Store due to the price limit of $999 set by Apple. AutoCAD 2014 for Mac was available for purchase from Autodesk's web site for $4,195 and AutoCAD LT 2014 for Mac for $1,200, or from an Autodesk authorized reseller. The latest version available for Mac is AutoCAD 2022 as of January 2022. Version history See also Autodesk 3ds Max Autodesk Maya Autodesk Revit AutoShade AutoSketch Comparison of computer-aided design software Design Web Format Feature creep LibreCAD – cross-platform, free and open source 2D CAD FreeCAD – cross-platform, free and open source 3D CAD BRL-CAD – cross-platform, free and open source 3D CAD References Further reading External links Autodesk products 1982 software IRIX software Computer-aided design software IOS software Classic Mac OS software Android (operating system) software MacOS computer-aided design software Software that uses Qt

2754

https://en.wikipedia.org/wiki/AutoCAD%20DXF

AutoCAD DXF

AutoCAD DXF (Drawing Interchange Format, or Drawing Exchange Format) is a CAD data file format developed by Autodesk for enabling data interoperability between AutoCAD and other programs. DXF was introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format, DWG (Drawing). For many years, Autodesk did not publish specifications, making correct imports of DXF files difficult. Autodesk now publishes the DXF specifications online. Versions of AutoCAD from Release 10 (October 1988) and up support both ASCII and binary forms of DXF. Earlier versions support only ASCII. As AutoCAD has become more powerful, supporting more complex object types, DXF has become less useful. Certain object types, including ACIS solids and regions, are not documented. Other object types, including AutoCAD 2006's dynamic blocks, and all of the objects specific to the vertical market versions of AutoCAD, are partially documented, but not well enough to allow other developers to support them. For these reasons many CAD applications use the DWG format which can be licensed from Autodesk or non-natively from the Open Design Alliance. DXF coordinates are always without dimensions so that the reader or user needs to know the drawing unit or has to extract it from the textual comments in the sheets. File structure ASCII versions of DXF can be read with any text editor. The basic organization of a DXF file is as follows: section General information about the drawing. Each parameter has a variable name and an associated value. section Holds the information for application-defined classes whose instances appear in the , , and sections of the database. Generally does not provide sufficient information to allow interoperability with other programs. section This section contains definitions of named items. Application ID () table Block Record () table Dimension Style () table Layer () table Linetype () table Text style () table User Coordinate System () table View () table Viewport configuration () table section This section contains Block Definition entities describing the entities comprising each Block in the drawing. section This section contains the drawing entities, including any Block References. section Contains the data that apply to nongraphical objects, used by AutoLISP, and ObjectARX applications. section Contains the preview image for the DXF file. The data format of a DXF is called a "tagged data" format, which "means that each data element in the file is preceded by an integer number that is called a group code. A group code's value indicates what type of data element follows. This value also indicates the meaning of a data element for a given object (or record) type. Virtually all user-specified information in a drawing file can be represented in DXF format." See also Design Web Format (DWF) QCAD, an open source CAD application that uses the DXF file format internally and to save and import files LibreCAD, a version of QCAD Community Edition ported to Qt4 Open Design Alliance (originally called OpenDWG) ShareCAD, a free online CAD viewer that supports DXF, among other formats References External links AutoCAD DXF Reference (from Release 14, 1998) (PDF version from 2012) AutoCAD DXF File Format Summary. Annotated example DXF file AutoDesk Online DXF File Viewer. DXF Autodesk products 1982 introductions DXF

2756

https://en.wikipedia.org/wiki/Asexual%20reproduction

Asexual reproduction

Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the full set of genes of their single parent. Asexual reproduction is the primary form of reproduction for single-celled organisms such as archaea and bacteria. Many eukaryotic organisms including plants, animals, and fungi can also reproduce asexually. In vertebrates, the most common form of asexual reproduction is parthenogenesis, which is typically used as an alternative to sexual reproduction in times when reproductive opportunities are limited. While all prokaryotes reproduce without the formation and fusion of gametes, mechanisms for lateral gene transfer such as conjugation, transformation and transduction can be likened to sexual reproduction in the sense of genetic recombination in meiosis. Types of asexual reproduction Fission Prokaryotes (Archaea and Bacteria) reproduce asexually through binary fission, in which the parent organism divides in two to produce two genetically identical daughter organisms. Eukaryotes (such as protists and unicellular fungi) may reproduce in a functionally similar manner by mitosis; most of these are also capable of sexual reproduction. Multiple fission at the cellular level occurs in many protists, e.g. sporozoans and algae. The nucleus of the parent cell divides several times by mitosis, producing several nuclei. The cytoplasm then separates, creating multiple daughter cells. In apicomplexans, multiple fission, or schizogony appears either as merogony, sporogony or gametogony. Merogony results in merozoites, which are multiple daughter cells, that originate within the same cell membrane, sporogony results in sporozoites, and gametogony results in microgametes. Budding Some cells divide by budding (for example baker's yeast), resulting in a "mother" and a "daughter" cell that is initially smaller than the parent. Budding is also known on a multicellular level; an animal example is the hydra, which reproduces by budding. The buds grow into fully matured individuals which eventually break away from the parent organism. Internal budding is a process of asexual reproduction, favoured by parasites such as Toxoplasma gondii. It involves an unusual process in which two (endodyogeny) or more (endopolygeny) daughter cells are produced inside a mother cell, which is then consumed by the offspring prior to their separation. Also, budding (external or internal) occurs in some worms like Taenia or Echinococcus; these worms produce cysts and then produce (invaginated or evaginated) protoscolex with budding. Vegetative propagation Vegetative propagation is a type of asexual reproduction found in plants where new individuals are formed without the production of seeds or spores and thus without syngamy or meiosis. Examples of vegetative reproduction include the formation of miniaturized plants called plantlets on specialized leaves, for example in kalanchoe (Bryophyllum daigremontianum) and many produce new plants from rhizomes or stolon (for example in strawberry). Other plants reproduce by forming bulbs or tubers (for example tulip bulbs and Dahlia tubers). Some plants produce adventitious shoots and may form a clonal colony. In these examples, all the individuals are clones, and the clonal population may cover a large area. Spore formation Many multicellular organisms form spores during their biological life cycle in a process called sporogenesis. Exceptions are animals and some protists, which undergo meiosis immediately followed by fertilization. Plants and many algae on the other hand undergo sporic meiosis where meiosis leads to the formation of haploid spores rather than gametes. These spores grow into multicellular individuals (called gametophytes in the case of plants) without a fertilization event. These haploid individuals give rise to gametes through mitosis. Meiosis and gamete formation therefore occur in separate generations or "phases" of the life cycle, referred to as alternation of generations. Since sexual reproduction is often more narrowly defined as the fusion of gametes (fertilization), spore formation in plant sporophytes and algae might be considered a form of asexual reproduction (agamogenesis) despite being the result of meiosis and undergoing a reduction in ploidy. However, both events (spore formation and fertilization) are necessary to complete sexual reproduction in the plant life cycle. Fungi and some algae can also utilize true asexual spore formation, which involves mitosis giving rise to reproductive cells called mitospores that develop into a new organism after dispersal. This method of reproduction is found for example in conidial fungi and the red algae Polysiphonia, and involves sporogenesis without meiosis. Thus the chromosome number of the spore cell is the same as that of the parent producing the spores. However, mitotic sporogenesis is an exception and most spores, such as those of plants and many algae, are produced by meiosis. Fragmentation Fragmentation is a form of asexual reproduction where a new organism grows from a fragment of the parent. Each fragment develops into a mature, fully grown individual. Fragmentation is seen in many organisms. Animals that reproduce asexually include planarians, many annelid worms including polychaetes and some oligochaetes, turbellarians and sea stars. Many fungi and plants reproduce asexually. Some plants have specialized structures for reproduction via fragmentation, such as gemmae in liverworts. Most lichens, which are a symbiotic union of a fungus and photosynthetic algae or cyanobacteria, reproduce through fragmentation to ensure that new individuals contain both symbionts. These fragments can take the form of soredia, dust-like particles consisting of fungal hyphen wrapped around photobiont cells. Clonal Fragmentation in multicellular or colonial organisms is a form of asexual reproduction or cloning where an organism is split into fragments. Each of these fragments develop into mature, fully grown individuals that are clones of the original organism. In echinoderms, this method of reproduction is usually known as fissiparity. Due to many environmental and epigenetic differences, clones originating from the same ancestor might actually be genetically and epigenetically different. Agamogenesis Agamogenesis is any form of reproduction that does not involve a male gamete. Examples are parthenogenesis and apomixis. Parthenogenesis Parthenogenesis is a form of agamogenesis in which an unfertilized egg develops into a new individual. It has been documented in over 2,000 species. Parthenogenesis occurs in the wild in many invertebrates (e.g. water fleas, rotifers, aphids, stick insects, some ants, bees and parasitic wasps) and vertebrates (mostly reptiles, amphibians, and fish). It has also been documented in domestic birds and in genetically altered lab mice. Plants can engage in parthenogenesis as well through a process called apomixis. However this process is considered by many to not be an independent reproduction method, but instead a breakdown of the mechanisms behind sexual reproduction. Parthenogenetic organisms can be split into two main categories: facultative and obligate. Facultative parthenogenesis In facultative parthenogenesis, females can reproduce both sexually and asexually. Because of the many advantages of sexual reproduction, most facultative parthenotes only reproduce asexually when forced to. This typically occurs in instances when finding a mate becomes difficult. For example, female zebra sharks will reproduce asexually if they are unable to find a mate in their ocean habitats. Parthenogenesis was previously believed to rarely occur in vertebrates, and only be possible in very small animals. However, it has been discovered in many more species in recent years. Today, the largest species that has been documented reproducing parthenogenically is the Komodo dragon at 10 feet long and over 300 pounds. Heterogony is a form of facultative parthenogenesis where females alternate between sexual and asexual reproduction at regular intervals (see Alternation between sexual and asexual reproduction). Aphids are one group of organism that engages in this type of reproduction. They use asexual reproduction to reproduce quickly and create winged offspring that can colonize new plants and reproduce sexually in the fall to lay eggs for the next season. However, some aphid species are obligate parthenotes. Obligate parthenogenesis In obligate parthenogenesis, females only reproduce asexually. One example of this is the desert grassland whiptail lizard, a hybrid of two other species. Typically hybrids are infertile but through parthenogenesis this species has been able to develop stable populations. Gynogenesis is a form of obligate parthenogenesis where a sperm cell is used to initiate reproduction. However, the sperm's genes never get incorporated into the egg cell. The best known example of this is the Amazon Molly. Because they are obligate parthenotes, there are no males in their species so they depend on males from a closely related species (the Sailfin Molly) for sperm. Apomixis and nucellar embryony Apomixis in plants is the formation of a new sporophyte without fertilization. It is important in ferns and in flowering plants, but is very rare in other seed plants. In flowering plants, the term "apomixis" is now most often used for agamospermy, the formation of seeds without fertilization, but was once used to include vegetative reproduction. An example of an apomictic plant would be the triploid European dandelion. Apomixis mainly occurs in two forms: In gametophytic apomixis, the embryo arises from an unfertilized egg within a diploid embryo sac that was formed without completing meiosis. In nucellar embryony, the embryo is formed from the diploid nucellus tissue surrounding the embryo sac. Nucellar embryony occurs in some citrus seeds. Male apomixis can occur in rare cases, such as the Saharan Cypress Cupressus dupreziana, where the genetic material of the embryo are derived entirely from pollen. Alternation between sexual and asexual reproduction Some species can alternate between sexual and asexual strategies, an ability known as heterogamy, depending on many conditions. Alternation is observed in several rotifer species (cyclical parthenogenesis e.g. in Brachionus species) and a few types of insects. One example of this is aphids which can engage in heterogony. In this system, females are born pregnant and produce only female offspring. This cycle allows them to reproduce very quickly. However, most species reproduce sexually once a year. This switch is triggered by environmental changes in the fall and causes females to develop eggs instead of embryos. This dynamic reproductive cycle allows them to produce specialized offspring with polyphenism, a type of polymorphism where different phenotypes have evolved to carry out specific tasks. The cape bee Apis mellifera subsp. capensis can reproduce asexually through a process called thelytoky. The freshwater crustacean Daphnia reproduces by parthenogenesis in the spring to rapidly populate ponds, then switches to sexual reproduction as the intensity of competition and predation increases. Monogonont rotifers of the genus Brachionus reproduce via cyclical parthenogenesis: at low population densities females produce asexually and at higher densities a chemical cue accumulates and induces the transition to sexual reproduction. Many protists and fungi alternate between sexual and asexual reproduction. A few species of amphibians, reptiles, and birds have a similar ability. The slime mold Dictyostelium undergoes binary fission (mitosis) as single-celled amoebae under favorable conditions. However, when conditions turn unfavorable, the cells aggregate and follow one of two different developmental pathways, depending on conditions. In the social pathway, they form a multi-cellular slug which then forms a fruiting body with asexually generated spores. In the sexual pathway, two cells fuse to form a giant cell that develops into a large cyst. When this macrocyst germinates, it releases hundreds of amoebic cells that are the product of meiotic recombination between the original two cells. The hyphae of the common mold (Rhizopus) are capable of producing both mitotic as well as meiotic spores. Many algae similarly switch between sexual and asexual reproduction. A number of plants use both sexual and asexual means to produce new plants, some species alter their primary modes of reproduction from sexual to asexual under varying environmental conditions. Inheritance in asexual species In the rotifer Brachionus calyciflorus asexual reproduction (obligate parthenogenesis) can be inherited by a recessive allele, which leads to loss of sexual reproduction in homozygous offspring. Inheritance of asexual reproduction by a single recessive locus has also been found in the parasitoid wasp Lysiphlebus fabarum. Examples in animals Asexual reproduction is found in nearly half of the animal phyla. Parthenogenesis occurs in the hammerhead shark and the blacktip shark. In both cases, the sharks had reached sexual maturity in captivity in the absence of males, and in both cases the offspring were shown to be genetically identical to the mothers. The New Mexico whiptail is another example. Some reptiles use the ZW sex-determination system, which produces either males (with ZZ sex chromosomes) or females (with ZW or WW sex chromosomes). Until 2010, it was thought that the ZW chromosome system used by reptiles was incapable of producing viable WW offspring, but a (ZW) female boa constrictor was discovered to have produced viable female offspring with WW chromosomes. The female boa could have chosen any number of male partners (and had successfully in the past) but on this occasion she reproduced asexually, creating 22 female babies with WW sex-chromosomes. Polyembryony is a widespread form of asexual reproduction in animals, whereby the fertilized egg or a later stage of embryonic development splits to form genetically identical clones. Within animals, this phenomenon has been best studied in the parasitic Hymenoptera. In the nine-banded armadillos, this process is obligatory and usually gives rise to genetically identical quadruplets. In other mammals, monozygotic twinning has no apparent genetic basis, though its occurrence is common. There are at least 10 million identical human twins and triplets in the world today. Bdelloid rotifers reproduce exclusively asexually, and all individuals in the class Bdelloidea are females. Asexuality evolved in these animals millions of years ago and has persisted since. There is evidence to suggest that asexual reproduction has allowed the animals to evolve new proteins through the Meselson effect that have allowed them to survive better in periods of dehydration. Bdelloid rotifers are extraordinarily resistant to damage from ionizing radiation due to the same DNA-preserving adaptations used to survive dormancy. These adaptations include an extremely efficient mechanism for repairing DNA double-strand breaks. This repair mechanism was studied in two Bdelloidea species, Adineta vaga, and Philodina roseola. and appears to involve mitotic recombination between homologous DNA regions within each species. Molecular evidence strongly suggests that several species of the stick insect genus Timema have used only asexual (parthenogenetic) reproduction for millions of years, the longest period known for any insect. In the grass thrips genus Aptinothrips there have been several transitions to asexuality, likely due to different causes. Adaptive significance of asexual reproduction A complete lack of sexual reproduction is relatively rare among multicellular organisms, particularly animals. It is not entirely understood why the ability to reproduce sexually is so common among them. Current hypotheses suggest that asexual reproduction may have short term benefits when rapid population growth is important or in stable environments, while sexual reproduction offers a net advantage by allowing more rapid generation of genetic diversity, allowing adaptation to changing environments. Developmental constraints may underlie why few animals have relinquished sexual reproduction completely in their life-cycles. Almost all asexual modes of reproduction maintain meiosis either in a modified form or as an alternative pathway. Facultatively apomictic plants increase frequencies of sexuality relative to apomixis after abiotic stress. Another constraint on switching from sexual to asexual reproduction would be the concomitant loss of meiosis and the protective recombinational repair of DNA damage afforded as one function of meiosis. See also Alternation of generations Self-fertilization Bacterial conjugation Biological life cycle Biological reproduction, also simply reproduction Cloning Hermaphrodite Plant reproduction Sex References Further reading External links Asexual reproduction Intestinal Protozoa

2758

https://en.wikipedia.org/wiki/Aelbert%20Cuyp

Aelbert Cuyp

Aelbert Jacobsz. Cuyp (20 October 1620 – 15 November 1691) was one of the leading Dutch Golden Age painters, producing mainly landscapes. The most famous of a family of painters, the pupil of his father Jacob Gerritsz. Cuyp (1594–1651/52), he is especially known for his large views of Dutch riverside scenes in a golden early morning or late afternoon light. Biography Cuyp was born in Dordrecht on 20 October 1620, and died there on 15 November 1691. Known as the Dutch equivalent of Claude Lorrain, he inherited a considerable fortune. His family were all artists, with his uncle Benjamin and grandfather Gerrit being stained glass cartoon designers. Jacob Gerritsz Cuyp, his father, was a portraitist. Cuyp's father was his first teacher and they collaborated on many paintings throughout his lifetime. Little is known about Aelbert Cuyp's life. Even Arnold Houbraken, a noted historian of Dutch Golden Age paintings and the sole authority on Cuyp for the hundred years following his death, paints a very thin biographical picture. His period of activity as a painter is traditionally limited to the two decades between 1639 and 1660, fitting within the generally accepted limits of the Dutch Golden Age's most significant period, 1640–1665. He is known to have been married to Cornelia Bosman in 1658, a date coinciding so directly with the end of his productivity as a painter that it has been accepted that his marriage played a role in the end of his artistic career. The year after his marriage Cuyp became the deacon of the reformed church. Houbraken recalled that Cuyp was a devout Calvinist and the fact that when he died, there were no paintings of other artists found in his home. Style The development of Cuyp, who was trained as a landscape painter, may be roughly sketched in three phases based on the painters who most influenced him during that time and the subsequent artistic characteristics that are apparent in his paintings. Generally, Cuyp learned tone from the exceptionally prolific Jan van Goyen, light from Jan Both and form from his father, Jacob Gerritsz Cuyp. Cuyp's "van Goyen phase" can be placed approximately in the early 1640s. Cuyp probably first encountered a painting by van Goyen in 1640 when van Goyen was, as Stephen Reiss points, out "at the height of [his] powers". This is noticeable in the comparison between two of Cuyp's landscape paintings inscribed 1639 where no properly formed style is apparent and the landscape backgrounds he painted two years later for two of his father's group portraits that are distinctly van Goyenesque. Cuyp took from van Goyen the straw yellow and light brown tones that are so apparent in his Dunes (1629) and the broken brush technique also very noticeable in that same work. This technique, a precursor to impressionism, is noted for the short brush strokes where the colors are not necessarily blended smoothly. In Cuyp's River Scene, Two Men Conversing (1641) both of these van Goyen-influenced stylistic elements are noticeable. The next phase in the development of Cuyp's increasingly amalgamated style is due to the influence of Jan Both. In the mid-1640s Both, a native and resident of Utrecht, had just returned to his hometown from a trip to Rome. It is around this same time that Cuyp's style changed fundamentally. In Rome, Both had developed a new style of composition due, at least in part, to his interaction with Claude Lorrain. This new style was focused on changing the direction of light in the painting. Instead of the light being placed at right angles in relation to the line of vision, Both started moving it to a diagonal position from the back of the picture. In this new form of lighting, the artist (and viewer of the painting) faced the sun more or less contre-jour. Both, and subsequently Cuyp, used the advantages of this new lighting style to alter the sense of depth and luminosity possible in a painting. To make notice of these new capabilities, much use was made of elongated shadows. Cuyp was one of the first Dutch painters to appreciate this new leap forward in style and while his own Both-inspired phase was quite short (limited to the mid-1640s) he did, more than any other contemporary Dutch artist, maximize the full chromatic scale for sunsets and sunrises. Cuyp's third stylistic phase (which occurred throughout his career) is based on the influence of his father. While it is assumed that the younger Cuyp did work with his father initially to develop rudimentary talents, Aelbert became more focused on landscape paintings while Jacob was a portrait painter by profession. As has been mentioned and as will be explained in depth below, there are pieces where Aelbert provided the landscape background for his father's portraits. What is meant by stating that Aelbert learned form from his father is that his eventual transition from a specifically landscape painter to the involvement of foreground figures is attributed to his interaction with his father Jacob. The evidence for Aelbert's evolution to foreground figure painter is in the production of some paintings from 1645 to 1650 featuring foreground animals that do not fit with Jacob's style. Adding to the confusion regarding Aelbert's stylistic development and the problem of attribution is of course the fact that Jacob's style was not stagnant either. Their converging styles make it difficult to exactly understand the influences each had on the other, although it is clear enough to say that Aelbert started representing large scale forms (something he had not done previously) and placing animals as the focus of his paintings (something that was specific to him). Paintings Sunlight in his paintings rakes across the panel, accentuating small bits of detail in the golden light. In large, atmospheric panoramas of the countryside, the highlights on a blade of meadow grass, the mane of a tranquil horse, the horn of a dairy cow reclining by a stream, or the tip of a peasant's hat are all caught in a bath of yellow ocher light. The richly varnished medium refracts the rays of light like a jewel as it dissolves into numerous glazed layers. Cuyp's landscapes were based on reality and on his own invention of what an enchanting landscape should be. Cuyp's drawings reveal him to be a draftsman of superior quality. Light-drenched washes of golden brown ink depict a distant view of the city of Dordrecht or Utrecht. A Cuyp drawing may look like he intended it to be a finished work of art, but it was most likely taken back to the studio and used as a reference for his paintings. Often the same section of a sketch can be found in several different pictures. Cuyp signed many of his works but rarely dated them, so that a chronology of his career has not been satisfactorily reassembled. A phenomenal number of paintings are ascribed to him, some of which are likely to be by other masters of the golden landscape, such as Abraham Calraet (1642–1722), whose initials A.C. may be mistaken for Cuyp's. However, not everyone appreciates his work and River Landscape (1660), despite being widely regarded as amongst his best work, has been described as having "chocolate box blandness". At the Madrid's Thyssen-Bornemisza Museum most likely, the sole Cuyp's painting in Spanish public collections can be seen, a Landscape with a sunset ca. 1655 with animals. Misattribution of paintings In addition to the scarcely documented and confirmed biography of Cuyp's life, and even more so than his amalgamated style from his three main influences, there are yet other factors that have led to the misattribution and confusion over Aelbert Cuyp's works for hundreds of years. His highly influenced style which incorporated Italianate lighting from Jan Both, broken brush technique and atonality from Jan van Goyen, and his ever-developing style from his father Jacob Gerritsz Cuyp was studied acutely by his most prominent follower, Abraham van Calraet. Calraet mimicked Cuyp's style, incorporating the same aspects, and produced similar landscapes to that of the latter. This made it quite difficult to tell whose paintings were whose. Adding to the confusion is the similar initials between the two and the inconsistent signing of paintings which were produced by Cuyp's studio. Although Aelbert Cuyp signed many of his paintings with a script "A. Cuyp" insignia, many paintings were left unsigned (not to mention undated) after being painted, and so a similar signature was added later on, presumably by collectors who inherited or discovered the works. Furthermore, many possible Cuyp paintings were not signed but rather initialed "A. C." referring to his name. However, Abraham van Calraet could also have used the same initials to denote a painting. Although this is unlikely (as Calraet would likely have signed his paintings "A. v.C."), this brings up the question of how paintings were signed to show ownership. Most original Cuyp paintings were signed by him, and in the script manner in which his name was inscribed. This would denote that the painting was done almost entirely by him. Conversely, paintings which came out of his workshop that were not necessarily physically worked on by Cuyp but merely overseen by him technically, were marked with A.C. to show that it was his instruction which saw the paintings' completion. Cuyp's pupils and assistants often worked on paintings in his studio, and so most of the work of a painting could be done without Cuyp ever touching the canvas, but merely approving its finality. Hence, the initialed inscription rather than a signature. Common among the mislabeled works are all of the reasons identified for misattributing Cuyp's works: the lack of biography and chronology of his works made it difficult to discern when paintings were created (making it difficult to pinpoint an artist); contentious signatures added to historians' confusion as to who actually painted the works; and the collaborations and influences by different painters makes it hard to justify that a painting is genuinely that of Aelbert Cuyp; and finally, accurate identification is made extremely difficult by the fact that this same style was copied (rather accurately) by his predecessor. As it turns out, even the historians and expert researchers have been fooled and forced to reassess their conclusions over "Cuyp's" paintings over the years. Later life After he married Cornelia Boschman in 1658, the number of works produced by him declined almost to nothing. This may have been because his wife was a very religious woman and a not very big patron of the arts. It could also be that he became more active in the church under his wife's guidance. He was also active as deacon and elder of the Reformed Church. Legacy Though long lacking a modern biography, and with the chronology of his works rather unclear, his style emerged from various influences and makes his works distinctive, although his collaborations with his father and works by his imitators often make attributions uncertain. His follower Abraham van Calraet represents a particular problem, and the signatures on paintings are not to be relied on. The Rijksmuseum has reattributed many works to other painters; Abraham van Calraet does not even appear in a Museum catalogue until 1926, and even then he was not given his own entry. Gallery References Further reading Gerard Hoet; Catalogus of Naamlyst van Schildereyen; The Hague; 1752; vol. 2 Jean-Baptiste Descamps; La Vie des peintres flamands, allemands et hollandois; Paris; [n. pub.]; 1753–1763; vol. 2, p. 80 George Agar-Ellis; Catalogue of the principal pictures in Flanders and Holland, 1822; London; W. Nicol; 1826; p. 70 John Smith; A Catalogue Raisonne of the Works of the most Eminent Dutch, Flemish and French Painters Part III Containing the Lives and Works of Anthony Van Dyck and David Teniers; London; Smith and Son; 1831; vol. 5, no. 13 Willem Bürger; Trésors d'Art exposés à Manchester en 1857; Paris; Jules Renouard et Cie; 1857; p. 266 Jan F. van Someren; Oude Kunst in Nederland: Etsen van Willem Steelink; Amsterdam; [n. pub.]; 1890; pl. 3 Emile Michel, Une famille d'artistes hollandais: Les Cuyps, Gazette des Beaux-Arts, 34, 1892, 5–23, 107–17, 224–38; p. 227 Cornelis Hofstede de Groot; A Catalogue Raisonné of the Works of the Most Eminent Dutch Painters of the Seventeenth Century. Vols 1–4 [1907-1927]; Bishops Stortford; Chadwick Healey; 1976; vol. 2, no. 36 Simon van Gijn; Dordracum Illustratum; Dordrecht; De Dordrechtsche Drukkerij-en Uitgevers-Maatschappij; 1908; no. 325 Eugène Fromentin; The Masters of Past Time: Dutch and Flemish Painting from Van Eyck to Rembrandt [1948]; Oxford; Phaidon Press; 1981; p. 149 Sir Francis Watson, The Art Collections at Waddesdon Manor I: The Paintings, Apollo, 69, June 1959, 172–182; p. 181 Christopher White, Dutch and Flemish Paintings at Waddesdon Manor, Gazette des Beaux-Arts, 54, August 1959, 67–74; p. 68 Ellis Waterhouse, Anthony Blunt; Paintings: The James A. de Rothschild Collection at Waddesdon Manor; Fribourg; Office du Livre, The National Trust; 1967; pp. 134–135, cat. no. 55 J Q Van Regteren Altena, Review of The James A. de Rothschild Collection at Waddesdon Manor. Ellis Waterhouse, Paintings., Oud Holland, 85, 1970, 59–61; p. 60 S. Reiss; Aelbert Cuyp; London; Zwemmer; 1975; p. 146, no. 106 Margarita Russell, Aelbert Cuyp. The Maas at Dordrecht: The Great Assembly of the Dutch Armed Forces, June–July 1646., Dutch Crossing, 40, 1990, 31–82; pp. 34–35 Ben Broos; Great Dutch Paintings from America; Zwolle; Waanders Publishers; 1990; p. 215 Alan Chong; Aelbert Cuyp and the Meanings of Landscape; New York University; 1992; p. 408, cat. no. 160; as 'The gathering of the fleet at Dordrecht' Arthur K Wheelock Jr.; Dutch Paintings of the Seventeenth Century: The National Gallery of Art's Systematic Catalogue; Washington, D.C.; National Gallery of Art; 1995; p. 129 Ruud Priem, The "Most Excellent Collection" of Lucretia Johanna van Winter: The Years 1809–22, with a Catalogue of the Works Purchased, Simiolus: Netherlands Quarterly for the History of Art, 25, 1997, 103–196; p. 118, fig. 19 Ruud Priem, Catalogue of Old Master Paintings Acquired by Lucretia Johanna van Winter, 1809–22, Simiolus: Netherlands Quarterly for the History of Art, 25, 1997, 197–230; p. 219, no. 38 Arthur K Wheelock Jr.; Aelbert Cuyp; National Gallery of Art, Washington, 7 October 2001 – 13 January 2002; National Gallery, London, 13 February – 12 May 2002; Rijksmuseum, Amsterdam, 7 June – 1 September 2002; New York; Thames & Hudson; 2001; pp. 146–149 Wouter Th. Kloek; Aelbert Cuyp: Land, Water, Light; Amsterdam, Zwolle; Rijksmuseum, Amsterdam, Waanders Publishers; 2002; p. 30 Michael Hall; Waddesdon Manor: The Heritage of a Rothschild House; New York; Harry N Abrams Inc; 2002; p. 88, ill. Ariane van Suchtelen, Arthur K Wheelock Jr.; Dutch Cityscapes of the Golden Age; Royal Picture Gallery Mauritshuis, The Hague, 11 October 2008 – 11 January 2009; National Gallery of Art, Washington, 1 February – 3 May 2009; Zwolle, Washington, D.C., The Hague; Waanders Publishers, National Gallery of Art, Royal Picture Gallery Mauritshuis, The Hague; 2008; p. 104, ill. Peter Hecht; 125 Jaar openbaar kunstbezit : met steun van de Vereniging Rembrandt; Zwolle; Waanders Publishers; 2008; pp. 12, 14, 209 n. 98 Arthur K Wheelock Jr.; "Aelbert Cuyp/The Maas at Dordrecht/c. 1650", Dutch Paintings of the Seventeenth Century, NGA Online Editions, accessed December 07, 2014.; Washington, D.C.; National Gallery of Art; 2012 External links Works and literature on Aelbert Cuyp Dutch and Flemish paintings from the Hermitage, an exhibition catalog from The Metropolitan Museum of Art (fully available online as PDF), which contains material on Cuyp (cat. no. 7) Aelbert Cuyp's artworks at Waddesdon Manor 1620 births 1691 deaths Dutch Golden Age painters Dutch male painters Dutch landscape painters Artists from Dordrecht Waddesdon Manor

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

Alkene

In chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond. Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds. Two general types of monoalkenes are distinguished: terminal and internal. Also called α-olefins, terminal alkenes are more useful. However, the IUPAC recommends using the name "alkene" only for acyclic hydrocarbons with just one double bond; alkadiene, alkatriene, etc., or polyene for acyclic hydrocarbons with two or more double bonds; cycloalkene, cycloalkadiene, etc. for cyclic ones; and "olefin" for the general class — cyclic or acyclic, with one or more double bonds. Acyclic alkenes, with only one double bond and no other functional groups (also known as mono-enes) form a homologous series of hydrocarbons with the general formula with n being 2 or more (which is two hydrogens less than the corresponding alkane). When n is four or more, isomers are possible, distinguished by the position and conformation of the double bond. Alkenes are generally colorless apolar compounds, somewhat similar to alkanes but more reactive. The first few members of the series are gases or liquids at room temperature. The simplest alkene, ethylene () (or "ethene" in the IUPAC nomenclature) is the organic compound produced on the largest scale industrially. Aromatic compounds are often drawn as cyclic alkenes, but their structure and properties are sufficiently distinct that they are not classified as alkenes or olefins. Hydrocarbons with two overlapping double bonds (C=C=C) are called allenes—the simplest such compound is itself called allene—and those with three or more overlapping bonds (C=C=C=C, C=C=C=C=C, etc.) are called cumulenes. Some authors do not consider allenes and cumulenes to be "alkenes". Structural isomerism Alkenes having four or more carbon atoms can form diverse structural isomers. Most alkenes are also isomers of cycloalkanes. Acyclic alkene structural isomers with only one double bond follow: : ethylene only : propylene only : 3 isomers: 1-butene, 2-butene, and isobutylene : 5 isomers: 1-pentene, 2-pentene, 2-methyl-1-butene, 3-methyl-1-butene, 2-methyl-2-butene : 13 isomers: 1-hexene, 2-hexene, 3-hexene, methylpentene (7 isomers), dimethylbutene (3 isomers) : 27 isomers (calculated) : 2,281 isomers (calculated) : 193,706,542,776 isomers (calculated) Many of these molecules exhibit cis–trans isomerism. There may also be chiral carbon atoms particularly within the larger molecules (from ). The number of potential isomers increases rapidly with additional carbon atoms. Structure and bonding Bonding A carbon–carbon double bond consists of a sigma bond and a pi bond. This double bond is stronger than a single covalent bond (611 kJ/mol for C=C vs. 347 kJ/mol for C–C), but not twice as strong. Double bonds are shorter than single bonds with an average bond length of 1.33 Å (133 pm) vs 1.53 Å for a typical C-C single bond. Each carbon atom of the double bond uses its three sp2 hybrid orbitals to form sigma bonds to three atoms (the other carbon atom and two hydrogen atoms). The unhybridized 2p atomic orbitals, which lie perpendicular to the plane created by the axes of the three sp² hybrid orbitals, combine to form the pi bond. This bond lies outside the main C–C axis, with half of the bond on one side of the molecule and a half on the other. With a strength of 65 kcal/mol, the pi bond is significantly weaker than the sigma bond. Rotation about the carbon–carbon double bond is restricted because it incurs an energetic cost to break the alignment of the p orbitals on the two carbon atoms. Consequently cis or trans isomers interconvert so slowly that they can be freely handled at ambient conditions without isomerization. More complex alkenes may be named with the E–Z notation for molecules with three or four different substituents (side groups). For example, of the isomers of butene, the two methyl groups of (Z)-but-2-ene (a.k.a. cis-2-butene) appear on the same side of the double bond, and in (E)-but-2-ene (a.k.a. trans-2-butene) the methyl groups appear on opposite sides. These two isomers of butene have distinct properties. Shape As predicted by the VSEPR model of electron pair repulsion, the molecular geometry of alkenes includes bond angles about each carbon atom in a double bond of about 120°. The angle may vary because of steric strain introduced by nonbonded interactions between functional groups attached to the carbon atoms of the double bond. For example, the C–C–C bond angle in propylene is 123.9°. For bridged alkenes, Bredt's rule states that a double bond cannot occur at the bridgehead of a bridged ring system unless the rings are large enough. Following Fawcett and defining S as the total number of non-bridgehead atoms in the rings, bicyclic systems require S ≥ 7 for stability and tricyclic systems require S ≥ 11. Physical properties Many of the physical properties of alkenes and alkanes are similar: they are colorless, nonpolar, and combustible. The physical state depends on molecular mass: like the corresponding saturated hydrocarbons, the simplest alkenes (ethylene, propylene, and butene) are gases at room temperature. Linear alkenes of approximately five to sixteen carbon atoms are liquids, and higher alkenes are waxy solids. The melting point of the solids also increases with increase in molecular mass. Alkenes generally have stronger smells than their corresponding alkanes. Ethylene has a sweet and musty odor. The binding of cupric ion to the olefin in the mammalian olfactory receptor MOR244-3 is implicated in the smell of alkenes (as well as thiols). Strained alkenes, in particular, like norbornene and trans-cyclooctene are known to have strong, unpleasant odors, a fact consistent with the stronger π complexes they form with metal ions including copper. Reactions Alkenes are relatively stable compounds, but are more reactive than alkanes. Most reactions of alkenes involve additions to this pi bond, forming new single bonds. Alkenes serve as a feedstock for the petrochemical industry because they can participate in a wide variety of reactions, prominently polymerization and alkylation. Except for ethylene, alkenes have two sites of reactivity: the carbon–carbon pi-bond and the presence of allylic CH centers. The former dominates but the allylic site are important too. Addition reactions Alkenes react in many addition reactions, which occur by opening up the double-bond. Most of these addition reactions follow the mechanism of electrophilic addition. Examples are hydrohalogenation, halogenation, halohydrin formation, oxymercuration, hydroboration, dichlorocarbene addition, Simmons–Smith reaction, catalytic hydrogenation, epoxidation, radical polymerization and hydroxylation. Hydrogenation and related hydroelementations Hydrogenation of alkenes produces the corresponding alkanes. The reaction is sometimes carried out under pressure and at elevated temperature. Metallic catalysts are almost always required. Common industrial catalysts are based on platinum, nickel, and palladium. A large scale application is the production of margarine. Aside from the addition of H-H across the double bond, many other H-X's can be added. These processes are often of great commercial significance. One example is the addition of H-SiR3, i.e., hydrosilylation. This reaction is used to generate organosilicon compounds. Another reaction is hydrocyanation, the addition of H-CN across the double bond. Hydration Hydration, the addition of water across the double bond of alkenes, yields alcohols. The reaction is catalyzed by phosphoric acid or sulfuric acid. This reaction is carried out on an industrial scale to produce synthetic ethanol. CH2=CH2 + H2O → CH3–CH2OH Alkenes can also be converted into alcohols via the oxymercuration–demercuration reaction , the hydroboration–oxidation reaction or by Mukaiyama hydration. Halogenation In electrophilic halogenation the addition of elemental bromine or chlorine to alkenes yields vicinal dibromo- and dichloroalkanes (1,2-dihalides or ethylene dihalides), respectively. The decoloration of a solution of bromine in water is an analytical test for the presence of alkenes: CH2=CH2 + Br2 → BrCH2–CH2Br Related reactions are also used as quantitative measures of unsaturation, expressed as the bromine number and iodine number of a compound or mixture. Hydrohalogenation Hydrohalogenation is the addition of hydrogen halides, such as HCl or HI, to alkenes to yield the corresponding haloalkanes: If the two carbon atoms at the double bond are linked to a different number of hydrogen atoms, the halogen is found preferentially at the carbon with fewer hydrogen substituents. This patterns is known as Markovnikov's rule. The use of radical initiators or other compounds can lead to the opposite product result. Hydrobromic acid in particular is prone to forming radicals in the presence of various impurities or even atmospheric oxygen, leading to the reversal of the Markovnikov result: Halohydrin formation Alkenes react with water and halogens to form halohydrins by an addition reaction. Markovnikov regiochemistry and anti-stereochemistry occur. CH2=CH2 + X2 + H2O → XCH2–CH2OH + HX Oxidation Alkenes react with percarboxylic acids and even hydrogen peroxide to yield epoxides: RCH=CH2 + RCO3H → RCHOCH2 + RCO2H For ethylene, the epoxidation is conducted on a very large scale industrially using oxygen in the presence of catalysts: C2H4 + 1/2 O2 → C2H4O Alkenes react with ozone, leading to the scission of the double bond. The process is called ozonolysis. Often the reaction procedure includes an mild reductant, such as dimethylsulfide (SMe2): RCH=CHR' + O3 + SMe2 → RCHO + R'CHO + O=SMe2 R2C=CHR' + O3 → R2CHO + R'CHO + O=SMe2 When treated with a hot concentrated, acidified solution of KMnO4, alkenes are cleaved ketones and/or carboxylic acids. The stoichiometry of the reaction is sensitive to conditions. This reaction and the ozonolysis can be used to determine the position of a double bond in an unknown alkene. The oxidation can be stopped at the vicinal diol rather than full cleavage of the alkene by using osmium tetroxide or other oxidants: R'CH=CR2 + 1/2 O2 + H2O → R'CH(OH)-C(OH)R2 This reaction is called dihydroxylation. In the presence of an appropriate photosensitiser, such as methylene blue and light, alkenes can undergo reaction with reactive oxygen species generated by the photosensitiser, such as hydroxyl radicals, singlet oxygen or superoxide ion. Reactions of the excited sensitizer can involve electron or hydrogen transfer, usually with a reducing substrate (Type I reaction) or interaction with oxygen (Type II reaction). These various alternative processes and reactions can be controlled by choice of specific reaction conditions, leading to a wide range of products. A common example is the [4+2]-cycloaddition of singlet oxygen with a diene such as cyclopentadiene to yield an endoperoxide: Another example is the Schenck ene reaction, in which singlet oxygen reacts with an allylic structure to give a transposed allyl peroxide: Polymerization Terminal alkenes are precursors to polymers via processes termed polymerization. Some polymerizations are of great economic significance, as they generate as the plastics polyethylene and polypropylene. Polymers from alkene are usually referred to as polyolefins although they contain no olefins. Polymerization can proceed via diverse mechanisms. conjugated dienes such as buta-1,3-diene and isoprene (2-methylbuta-1,3-diene) also produce polymers, one example being natural rubber. Metal complexation Alkenes are ligands in transition metal alkene complexes. The two carbon centres bond to the metal using the C–C pi- and pi*-orbitals. Mono- and diolefins are often used as ligands in stable complexes. Cyclooctadiene and norbornadiene are popular chelating agents, and even ethylene itself is sometimes used as a ligand, for example, in Zeise's salt. In addition, metal–alkene complexes are intermediates in many metal-catalyzed reactions including hydrogenation, hydroformylation, and polymerization. Reaction overview Synthesis Industrial methods Alkenes are produced by hydrocarbon cracking. Raw materials are mostly natural gas condensate components (principally ethane and propane) in the US and Mideast and naphtha in Europe and Asia. Alkanes are broken apart at high temperatures, often in the presence of a zeolite catalyst, to produce a mixture of primarily aliphatic alkenes and lower molecular weight alkanes. The mixture is feedstock and temperature dependent, and separated by fractional distillation. This is mainly used for the manufacture of small alkenes (up to six carbons). Related to this is catalytic dehydrogenation, where an alkane loses hydrogen at high temperatures to produce a corresponding alkene. This is the reverse of the catalytic hydrogenation of alkenes. This process is also known as reforming. Both processes are endothermic and are driven towards the alkene at high temperatures by entropy. Catalytic synthesis of higher α-alkenes (of the type RCH=CH2) can also be achieved by a reaction of ethylene with the organometallic compound triethylaluminium in the presence of nickel, cobalt, or platinum. Elimination reactions One of the principal methods for alkene synthesis in the laboratory is the room elimination of alkyl halides, alcohols, and similar compounds. Most common is the β-elimination via the E2 or E1 mechanism, but α-eliminations are also known. The E2 mechanism provides a more reliable β-elimination method than E1 for most alkene syntheses. Most E2 eliminations start with an alkyl halide or alkyl sulfonate ester (such as a tosylate or triflate). When an alkyl halide is used, the reaction is called a dehydrohalogenation. For unsymmetrical products, the more substituted alkenes (those with fewer hydrogens attached to the C=C) tend to predominate (see Zaitsev's rule). Two common methods of elimination reactions are dehydrohalogenation of alkyl halides and dehydration of alcohols. A typical example is shown below; note that if possible, the H is anti to the leaving group, even though this leads to the less stable Z-isomer. Alkenes can be synthesized from alcohols via dehydration, in which case water is lost via the E1 mechanism. For example, the dehydration of ethanol produces ethylene: CH3CH2OH → H2C=CH2 + H2O An alcohol may also be converted to a better leaving group (e.g., xanthate), so as to allow a milder syn-elimination such as the Chugaev elimination and the Grieco elimination. Related reactions include eliminations by β-haloethers (the Boord olefin synthesis) and esters (ester pyrolysis). Alkenes can be prepared indirectly from alkyl amines. The amine or ammonia is not a suitable leaving group, so the amine is first either alkylated (as in the Hofmann elimination) or oxidized to an amine oxide (the Cope reaction) to render a smooth elimination possible. The Cope reaction is a syn-elimination that occurs at or below 150 °C, for example: The Hofmann elimination is unusual in that the less substituted (non-Zaitsev) alkene is usually the major product. Alkenes are generated from α-halosulfones in the Ramberg–Bäcklund reaction, via a three-membered ring sulfone intermediate. Synthesis from carbonyl compounds Another important method for alkene synthesis involves construction of a new carbon–carbon double bond by coupling of a carbonyl compound (such as an aldehyde or ketone) to a carbanion equivalent. Such reactions are sometimes called olefinations. The most well-known of these methods is the Wittig reaction, but other related methods are known, including the Horner–Wadsworth–Emmons reaction. The Wittig reaction involves reaction of an aldehyde or ketone with a Wittig reagent (or phosphorane) of the type Ph3P=CHR to produce an alkene and Ph3P=O. The Wittig reagent is itself prepared easily from triphenylphosphine and an alkyl halide. The reaction is quite general and many functional groups are tolerated, even esters, as in this example: Related to the Wittig reaction is the Peterson olefination, which uses silicon-based reagents in place of the phosphorane. This reaction allows for the selection of E- or Z-products. If an E-product is desired, another alternative is the Julia olefination, which uses the carbanion generated from a phenyl sulfone. The Takai olefination based on an organochromium intermediate also delivers E-products. A titanium compound, Tebbe's reagent, is useful for the synthesis of methylene compounds; in this case, even esters and amides react. A pair of ketones or aldehydes can be deoxygenated to generate an alkene. Symmetrical alkenes can be prepared from a single aldehyde or ketone coupling with itself, using titanium metal reduction (the McMurry reaction). If different ketones are to be coupled, a more complicated method is required, such as the Barton–Kellogg reaction. A single ketone can also be converted to the corresponding alkene via its tosylhydrazone, using sodium methoxide (the Bamford–Stevens reaction) or an alkyllithium (the Shapiro reaction). Synthesis from alkenes The formation of longer alkenes via the step-wise polymerisation of smaller ones is appealing, as ethylene (the smallest alkene) is both inexpensive and readily available, with hundreds of millions of tonnes produced annually. The Ziegler–Natta process allows for the formation of very long chains, for instance those used for polyethylene. Where shorter chains are wanted, as they for the production of surfactants, then processes incorporating a olefin metathesis step, such as the Shell higher olefin process are important. Olefin metathesis is also used commercially for the interconversion of ethylene and 2-butene to propylene. Rhenium- and molybdenum-containing heterogeneous catalysis are used in this process: CH2=CH2 + CH3CH=CHCH3 → 2 CH2=CHCH3 Transition metal catalyzed hydrovinylation is another important alkene synthesis process starting from alkene itself. It involves the addition of a hydrogen and a vinyl group (or an alkenyl group) across a double bond. From alkynes Reduction of alkynes is a useful method for the stereoselective synthesis of disubstituted alkenes. If the cis-alkene is desired, hydrogenation in the presence of Lindlar's catalyst (a heterogeneous catalyst that consists of palladium deposited on calcium carbonate and treated with various forms of lead) is commonly used, though hydroboration followed by hydrolysis provides an alternative approach. Reduction of the alkyne by sodium metal in liquid ammonia gives the trans-alkene. For the preparation multisubstituted alkenes, carbometalation of alkynes can give rise to a large variety of alkene derivatives. Rearrangements and related reactions Alkenes can be synthesized from other alkenes via rearrangement reactions. Besides olefin metathesis (described above), many pericyclic reactions can be used such as the ene reaction and the Cope rearrangement. In the Diels–Alder reaction, a cyclohexene derivative is prepared from a diene and a reactive or electron-deficient alkene. IUPAC Nomenclature Although the nomenclature is not followed widely, according to IUPAC, an alkene is an acyclic hydrocarbon with just one double bond between carbon atoms. Olefins comprise a larger collection of cyclic and acyclic alkenes as well as dienes and polyenes. To form the root of the IUPAC names for straight-chain alkenes, change the -an- infix of the parent to -en-. For example, CH3-CH3 is the alkane ethANe. The name of CH2=CH2 is therefore ethENe. For straight-chain alkenes with 4 or more carbon atoms, that name does not completely identify the compound. For those cases, and for branched acyclic alkenes, the following rules apply: Find the longest carbon chain in the molecule. If that chain does not contain the double bond, name the compound according to the alkane naming rules. Otherwise: Number the carbons in that chain starting from the end that is closest to the double bond. Define the location k of the double bond as being the number of its first carbon. Name the side groups (other than hydrogen) according to the appropriate rules. Define the position of each side group as the number of the chain carbon it is attached to. Write the position and name of each side group. Write the names of the alkane with the same chain, replacing the "-ane" suffix by "k-ene". The position of the double bond is often inserted before the name of the chain (e.g. "2-pentene"), rather than before the suffix ("pent-2-ene"). The positions need not be indicated if they are unique. Note that the double bond may imply a different chain numbering than that used for the corresponding alkane: C–– is "2,2-dimethyl pentane", whereas C–= is "3,3-dimethyl 1-pentene". More complex rules apply for polyenes and cycloalkenes. Cis–trans isomerism If the double bond of an acyclic mono-ene is not the first bond of the chain, the name as constructed above still does not completely identify the compound, because of cis–trans isomerism. Then one must specify whether the two single C–C bonds adjacent to the double bond are on the same side of its plane, or on opposite sides. For monoalkenes, the configuration is often indicated by the prefixes cis- (from Latin "on this side of") or trans- ("across", "on the other side of") before the name, respectively; as in cis-2-pentene or trans-2-butene. More generally, cis–trans isomerism will exist if each of the two carbons of in the double bond has two different atoms or groups attached to it. Accounting for these cases, the IUPAC recommends the more general E–Z notation, instead of the cis and trans prefixes. This notation considers the group with highest CIP priority in each of the two carbons. If these two groups are on opposite sides of the double bond's plane, the configuration is labeled E (from the German entgegen meaning "opposite"); if they are on the same side, it is labeled Z (from German zusammen, "together"). This labeling may be taught with mnemonic "Z means 'on ze zame zide'". Groups containing C=C double bonds IUPAC recognizes two names for hydrocarbon groups containing carbon–carbon double bonds, the vinyl group and the allyl group. See also Alpha-olefin Annulene Aromatic hydrocarbon ("Arene") Cycloalkene Dendralene Diene Nitroalkene Polyene Radialene Nomenclature links Rule A-3. Unsaturated Compounds and Univalent Radicals IUPAC Blue Book. Rule A-4. Bivalent and Multivalent Radicals IUPAC Blue Book. Rules A-11.3, A-11.4, A-11.5 Unsaturated monocyclic hydrocarbons and substituents IUPAC Blue Book. Rule A-23. Hydrogenated Compounds of Fused Polycyclic Hydrocarbons IUPAC Blue Book. References

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

Allenes

Allenes are organic compounds in which one carbon atom has double bonds with each of its two adjacent carbon centres. Allenes are classified as cumulated dienes. The parent compound of this class is propadiene, which is itself also called allene. Compounds with an allene-type structure but with more than three carbon atoms are members of a larger class of compounds called cumulenes with X=C=Y bonding. History For many years, allenes were viewed as curiosities but thought to be synthetically useless, difficult to prepare and to work with. Reportedly, the first synthesis of an allene, glutinic acid, was performed in an attempt to prove the non-existence of this class of compounds. The situation began to change in the 1950s, and more than 300 papers on allenes have been published in 2012 alone. These compounds are not just interesting intermediates but synthetically valuable targets themselves; for example, over 150 natural products are known with an allene or cumulene fragment. Structure and properties Geometry The central carbon atom of allenes forms two sigma bonds and two pi bonds. The central carbon atom is sp-hybridized, and the two terminal carbon atoms are sp2-hybridized. The bond angle formed by the three carbon atoms is 180°, indicating linear geometry for the central carbon atom. The two terminal carbon atoms are planar, and these planes are twisted 90° from each other. The structure can also be viewed as an "extended tetrahedral" with a similar shape to methane, an analogy that is continued into the stereochemical analysis of certain derivative molecules. Symmetry The symmetry and isomerism of allenes has long fascinated organic chemists. For allenes with four identical substituents, there exist two twofold axes of rotation through the central carbon atom, inclined at 45° to the CH2 planes at either end of the molecule. The molecule can thus be thought of as a two-bladed propeller. A third twofold axis of rotation passes through the C=C=C bonds, and there is a mirror plane passing through both CH2 planes. Thus this class of molecules belong to the D2d point group. Because of the symmetry, an unsubstituted allene has no net dipole moment. An allene with two different substituents on each of the two carbon atoms will be chiral because there will no longer be any mirror planes. The chirality of these types of allenes was first predicted in 1875 by Jacobus Henricus van 't Hoff, but not proven experimentally until 1935. Where A has a greater priority than B according to the Cahn–Ingold–Prelog priority rules, the configuration of the axial chirality can be determined by considering the substituents on the front atom followed by the back atom when viewed along the allene axis. For the back atom, only the group of higher priority need be considered. Chiral allenes have been recently used as building blocks in the construction of organic materials with exceptional chiroptical properties. There are a few examples of drug molecule having an allene system in their structure.  Mycomycin, an antibiotic with tuberculostatic properties, is a typical example. This drug exhibits enantiomerism due to the presence of a suitably substituted allene system. Although the semi-localized textbook σ-π separation model describes the bonding of allene using a pair of localized orthogonal π orbitals, the full molecular orbital description of the bonding is more subtle. The symmetry-correct doubly-degenerate HOMOs of allene (adapted to the D2d point group) can either be represented by a pair of orthogonal MOs or as twisted helical linear combinations of these orthogonal MOs. The symmetry of the system and the degeneracy of these orbitals imply that both descriptions are correct (in the same way that there are infinitely many ways to depict the doubly-degenerate HOMOs and LUMOs of benzene that correspond to different choices of eigenfunctions in a two-dimensional eigenspace). However, this degeneracy is lifted in substituted allenes, and the helical picture becomes the only symmetry-correct description for the HOMO and HOMO–1 of the C2-symmetric 1,3-dimethylallene. This qualitative MO description extends to higher odd-carbon cumulenes (e.g., 1,2,3,4-pentatetraene). Chemical and spectral properties Allenes differ considerably from other alkenes in terms of their chemical properties. Compared to isolated and conjugated dienes, they are considerably less stable: comparing the isomeric pentadienes, the allenic 1,2-pentadiene has a heat of formation of 33.6 kcal/mol, compared to 18.1 kcal/mol for (E)-1,3-pentadiene and 25.4 kcal/mol for the isolated 1,4-pentadiene. The C–H bonds of allenes are considerably weaker and more acidic compared to typical vinylic C–H bonds: the bond dissociation energy is 87.7 kcal/mol (compared to 111 kcal/mol in ethylene), while the gas-phase acidity is 381 kcal/mol (compared to 409 kcal/mol for ethylene), making it slightly more acidic than the propargylic C–H bond of propyne (382 kcal/mol). The 13C NMR spectrum of allenes is characterized by the signal of the sp-hybridized carbon atom, resonating at a characteristic 200-220 ppm. In contrast, the sp2-hybridized carbon atoms resonate around 80 ppm in a region typical for alkyne and nitrile carbon atoms, while the protons of a CH2 group of a terminal allene resonate at around 4.5 ppm — somewhat upfield of a typical vinylic proton. Allenes possess a rich cycloaddition chemistry, including both [4+2] and [2+2] modes of addition, as well as undergoing formal cycloaddition processes catalyzed by transition metals. Allenes also serve as substrates for transition metal catalyzed hydrofunctionalization reactions. Synthesis Although allenes often require specialized syntheses, the parent allene, propadiene is produced industrially on a large scale as an equilibrium mixture with methylacetylene: H2C=C=CH2 H3C–C≡CH This mixture, known as MAPP gas, is commercially available. At 298 K, the ΔG° of this reaction is –1.9 kcal/mol, corresponding to Keq = 24.7. The first allene to be synthesized was penta-2,3-dienedioic acid, which was prepared by Burton and Pechmann in 1887. However, the structure was only correctly identified in 1954. Laboratory methods for the formation of allenes include: from geminal dihalocyclopropanes and organolithium compounds (or metallic sodium or magnesium) in the Skattebøl rearrangement (Doering–LaFlamme allene synthesis) via rearrangement of cyclopropylidene carbenes/carbenoids from reaction of certain terminal alkynes with formaldehyde, copper(I) bromide, and added base (Crabbé–Ma allene synthesis) from propargylic halides by SN2′ displacement by an organocuprate from dehydrohalogenation of certain dihalides from reaction of a triphenylphosphinyl ester with an acid halide, a Wittig reaction accompanied by dehydrohalogenation from propargylic alcohols via the Myers allene synthesis protocol—a stereospecific process from metalation of allene or substituted allenes with BuLi and reaction with electrophiles (RX, R3SiX, D2O, etc.) The chemistry of allenes has been reviewed in a number of books and journal articles. Some key approaches towards allenes are outlined in the following scheme: One of the older methods is the Skattebøl rearrangement (also called the Doering–Moore–Skattebøl or Doering–LaFlamme rearrangement), in which a gem-dihalocyclopropane 3 is treated with an organolithium compound (or dissolving metal) and the presumed intermediate rearranges into an allene either directly or via carbene-like species. Notably, even strained allenes can be generated by this procedure. Modifications involving leaving groups of different nature are also known. Arguably, the most convenient modern method of allene synthesis is by sigmatropic rearrangement of propargylic substrates. Johnson–Claisen and Ireland–Claisen rearrangements of ketene acetals 4 have been used a number of times to prepare allenic esters and acids. Reactions of vinyl ethers 5 (the Saucy–Marbet rearrangement) give allene aldehydes, while propargylic sulfenates 6 give allene sulfoxides. Allenes can also be prepared by nucleophilic substitution in 9 and 10 (nucleophile Nu− can be a hydride anion), 1,2-elimination from 8, proton transfer in 7, and other, less general, methods. Use and occurrence Use The reactivity of allenes is rich and opens wide possibilities for discovery. The two π-bonds are located at the 90° angle to each other, and thus require a reagent to approach from somewhat different directions. With an appropriate substitution pattern, allenes exhibit axial chirality as predicted by van’t Hoff as early as 1875. Such compounds are now extensively investigated. Protonation of allenes gives cations 11 that undergo further transformations.56 Reactions with soft electrophiles (e.g. Br+) deliver positively charged onium ions 13. Transition-metal-catalysed reactions proceed via allylic intermediates 15 and have attracted significant interest in recent years. Numerous cycloadditions are also known, including [4+2]-, (2+1)-, and [2+2]-variants, which deliver, e.g., 12, 14, and 16, respectively. Occurrence Numerous natural products contain the allene functional group. Noteworthy are the pigments fucoxanthin and peridinin. Little is known about the biosynthesis, although it is conjectured that they are often generated from alkyne precursors. Allenes serve as ligands in organometallic chemistry. A typical complex is Pt(η2-allene)(PPh3)2. Ni(0) reagents catalyze the cyclooligomerization of allene. Using a suitable catalyst (e.g. Wilkinson's catalyst), it is possible to reduce just one of the double bonds of an allene. Delta convention Many rings or ring systems are known by semisystematic names that assume a maximum number of noncumulative bonds. To unambiguously specify derivatives that include cumulated bonds (and hence fewer hydrogen atoms than would be expected from the skeleton), a lowercase delta may be used with a subscript indicating the number of cumulated double bonds from that atom, e.g. 8δ2-benzocyclononene. This may be combined with the λ-convention for specifying nonstandard valency states, e.g. 2λ4δ2,5λ4δ2-thieno[3,4-c]thiophene. See also Compounds with three or more adjacent carbon–carbon double bonds are called cumulenes. References Further reading Brummond, Kay M. (editor). Allene chemistry (special thematic issue). Beilstein Journal of Organic Chemistry 7: 394–943. External links Synthesis of allenes Jacobus Henricus van 't Hoff

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

Alkyne

In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond. The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula . Alkynes are traditionally known as acetylenes, although the name acetylene also refers specifically to , known formally as ethyne using IUPAC nomenclature. Like other hydrocarbons, alkynes are generally hydrophobic. Structure and bonding In acetylene, the H–C≡C bond angles are 180°. By virtue of this bond angle, alkynes are rod-like. Correspondingly, cyclic alkynes are rare. Benzyne cannot be isolated. The C≡C bond distance of 121 picometers is much shorter than the C=C distance in alkenes (134 pm) or the C–C bond in alkanes (153 pm). The triple bond is very strong with a bond strength of 839 kJ/mol. The sigma bond contributes 369 kJ/mol, the first pi bond contributes 268 kJ/mol and the second pi-bond of 202 kJ/mol bond strength. Bonding usually discussed in the context of molecular orbital theory, which recognizes the triple bond as arising from overlap of s and p orbitals. In the language of valence bond theory, the carbon atoms in an alkyne bond are sp hybridized: they each have two unhybridized p orbitals and two sp hybrid orbitals. Overlap of an sp orbital from each atom forms one sp–sp sigma bond. Each p orbital on one atom overlaps one on the other atom, forming two pi bonds, giving a total of three bonds. The remaining sp orbital on each atom can form a sigma bond to another atom, for example to hydrogen atoms in the parent acetylene. The two sp orbitals project on opposite sides of the carbon atom. Terminal and internal alkynes Internal alkynes feature carbon substituents on each acetylenic carbon. Symmetrical examples include diphenylacetylene and 3-hexyne. Terminal alkynes have the formula . An example is methylacetylene (propyne using IUPAC nomenclature). Terminal alkynes, like acetylene itself, are mildly acidic, with pKa values of around 25. They are far more acidic than alkenes and alkanes, which have pKa values of around 40 and 50, respectively. The acidic hydrogen on terminal alkynes can be replaced by a variety of groups resulting in halo-, silyl-, and alkoxoalkynes. The carbanions generated by deprotonation of terminal alkynes are called acetylides. Naming alkynes In systematic chemical nomenclature, alkynes are named with the Greek prefix system without any additional letters. Examples include ethyne or octyne. In parent chains with four or more carbons, it is necessary to say where the triple bond is located. For octyne, one can either write 3-octyne or oct-3-yne when the bond starts at the third carbon. The lowest number possible is given to the triple bond. When no superior functional groups are present, the parent chain must include the triple bond even if it is not the longest possible carbon chain in the molecule. Ethyne is commonly called by its trivial name acetylene. In chemistry, the suffix -yne is used to denote the presence of a triple bond. In organic chemistry, the suffix often follows IUPAC nomenclature. However, inorganic compounds featuring unsaturation in the form of triple bonds may be denoted by substitutive nomenclature with the same methods used with alkynes (i.e. the name of the corresponding saturated compound is modified by replacing the "-ane" ending with "-yne"). "-diyne" is used when there are two triple bonds, and so on. The position of unsaturation is indicated by a numerical locant immediately preceding the "-yne" suffix, or 'locants' in the case of multiple triple bonds. Locants are chosen so that the numbers are low as possible. "-yne" is also used as an infix to name substituent groups that are triply bound to the parent compound. Sometimes a number between hyphens is inserted before it to state which atoms the triple bond is between. This suffix arose as a collapsed form of the end of the word "acetylene". The final "-e" disappears if it is followed by another suffix that starts with a vowel. Synthesis Cracking Commercially, the dominant alkyne is acetylene itself, which is used as a fuel and a precursor to other compounds, e.g., acrylates. Hundreds of millions of kilograms are produced annually by partial oxidation of natural gas: 2  +   → HC≡CH + 3 Propyne, also industrially useful, is also prepared by thermal cracking of hydrocarbons. Dehydrohalogenation and related reactions Alkynes are prepared from 1,2- and 1,1-alkyl dihalides by double dehydrohalogenation. The reaction provides a means to generate alkynes from alkenes, which are first halogenated and then dehydrohalogenated. For example, phenylacetylene can be generated from styrene by bromination followed by treatment of the resulting of styrene dibromide with sodium amide in ammonia: Via the Fritsch–Buttenberg–Wiechell rearrangement, alkynes are prepared from vinyl bromides. Alkynes can be prepared from aldehydes using the Corey–Fuchs reaction and from aldehydes or ketones by the Seyferth–Gilbert homologation. Vinyl chlorides are susceptible to dehydrochlorination. Vinyl chlorides are available from aldehydes using the reagent (chloromethylene)triphenylphosphorane. Reactions, including applications Featuring a reactive functional group, alkynes participate in many organic reactions. Such use was pioneered by Ralph Raphael, who in 1955 wrote the first book describing their versatility as intermediates in synthesis. Hydrogenation Being more unsaturated than alkenes, alkynes characteristically undergo reactions that show that they are "doubly unsaturated". Alkynes are capable of adding two equivalents of , whereas an alkene adds only one equivalent. Depending on catalysts and conditions, alkynes add one or two equivalents of hydrogen. Partial hydrogenation, stopping after the addition of only one equivalent to give the alkene, is usually more desirable since alkanes are less useful: The largest scale application of this technology is the conversion of acetylene to ethylene in refineries (the steam cracking of alkanes yields a few percent acetylene, which is selectively hydrogenated in the presence of a palladium/silver catalyst). For more complex alkynes, the Lindlar catalyst is widely recommended to avoid formation of the alkane, for example in the conversion of phenylacetylene to styrene. Similarly, halogenation of alkynes gives the alkene dihalides or alkyl tetrahalides: RC≡CR′ + → cis-RCH=CR′H RCH=CR′H + → The addition of one equivalent of to internal alkynes gives cis-alkenes. Addition of halogens and related reagents Alkynes characteristically are capable of adding two equivalents of halogens and hydrogen halides. RC≡CR′ + 2 → The addition of nonpolar E–H bonds across C≡C is general for silanes, boranes, and related hydrides. The hydroboration of alkynes gives vinylic boranes which oxidize to the corresponding aldehyde or ketone. In the thiol-yne reaction the substrate is a thiol. Addition of hydrogen halides has long been of interest. In the presence of mercuric chloride as a catalyst, acetylene and hydrogen chloride react to give vinyl chloride. While this method has been abandoned in the West, it remains the main production method in China. Hydration The hydration reaction of acetylene gives acetaldehyde. The reaction proceeds by formation of vinyl alcohol, which undergoes tautomerizes to form the aldehyde. This reaction was once a major industrial process but it has been displaced by the Wacker process. This reaction occurs in nature, the catalyst being acetylene hydratase. The hydration of phenylacetylene gives acetophenone, and the (Ph3P)AuCH3-catalyzed hydration of 1,8-nonadiyne to 2,8-nonanedione: PhC≡CH + H2O → PhCOCH3 HC≡C(CH2)5C≡CH + 2H2O → CH3CO(CH2)5COCH3 Tautomerism Terminal alkyl alkynes exhibit tautomerism. Propyne exists in equilibrium with allene: HC≡C-CH3 CH2=C=CH2 Cycloadditions and oxidation Alkynes undergo diverse cycloaddition reactions. The Diels–Alder reaction with 1,3-dienes give 1,4-cyclohexadienes. This general reaction has been extensively developed. Electrophilic alkynes are especially effective dienophiles. The "cycloadduct" derived from the addition of alkynes to 2-pyrone eliminates carbon dioxide to give the aromatic compound. Other specialized cycloadditions include multicomponent reactions such as alkyne trimerisation to give aromatic compounds and the [2+2+1]-cycloaddition of an alkyne, alkene and carbon monoxide in the Pauson–Khand reaction. Non-carbon reagents also undergo cyclization, e.g. Azide alkyne Huisgen cycloaddition to give triazoles. Cycloaddition processes involving alkynes are often catalyzed by metals, e.g. enyne metathesis and alkyne metathesis, which allows the scrambling of carbyne (RC) centers: RC≡CR + R′C≡CR′ 2 RC≡CR′ Oxidative cleavage of alkynes proceeds via cycloaddition to metal oxides. Most famously, potassium permanganate converts alkynes to a pair of carboxylic acids. Reactions specific for terminal alkynes Terminal alkynes are readily converted to many derivatives, e.g. by coupling reactions and condensations. Via the condensation with formaldehyde and acetylene is produced butynediol: 2 CH2O + HC≡CH → HOCH2CCCH2OH In the Sonogashira reaction, terminal alkynes are coupled with aryl or vinyl halides: This reactivity exploits the fact that terminal alkynes are weak acids, whose typical pKa values around 25 place them between that of ammonia (35) and ethanol (16): RC≡CH + MX → RC≡CM + HX (MX = NaNH2, LiBu, RMgX) The reactions of alkynes with certain metal cations, e.g. Ag+ and Cu+ also gives acetylides. Thus, few drops of diamminesilver(I) hydroxide (Ag(NH3)2OH) reacts with terminal alkynes signaled by formation of a white precipitate of the silver acetylide. This reactivity is the basis of alkyne coupling reactions, including the Cadiot–Chodkiewicz coupling, Glaser coupling, and the Eglinton coupling: 2R-\!{\equiv}\!-H ->[\ce{Cu(OAc)2}][\ce{pyridine}] R-\!{\equiv}\!-\!{\equiv}\!-R In the Favorskii reaction and in alkynylations in general, terminal alkynes add to carbonyl compounds to give the hydroxyalkyne. Metal complexes Alkynes form complexes with transition metals. Such complexes occur also in metal catalyzed reactions of alkynes such as alkyne trimerization. Terminal alkynes, including acetylene itself, react with water to give aldehydes. The transformation typically requires metal catalysts to give this anti-Markovnikov addition result. Alkynes in nature and medicine According to Ferdinand Bohlmann, the first naturally occurring acetylenic compound, dehydromatricaria ester, was isolated from an Artemisia species in 1826. In the nearly two centuries that have followed, well over a thousand naturally occurring acetylenes have been discovered and reported. Polyynes, a subset of this class of natural products, have been isolated from a wide variety of plant species, cultures of higher fungi, bacteria, marine sponges, and corals. Some acids like tariric acid contain an alkyne group. Diynes and triynes, species with the linkage RC≡C–C≡CR′ and RC≡C–C≡C–C≡CR′ respectively, occur in certain plants (Ichthyothere, Chrysanthemum, Cicuta, Oenanthe and other members of the Asteraceae and Apiaceae families). Some examples are cicutoxin, oenanthotoxin, and falcarinol . These compounds are highly bioactive, e.g. as nematocides. 1-Phenylhepta-1,3,5-triyne is illustrative of a naturally occurring triyne. Alkynes occur in some pharmaceuticals, including the contraceptive noretynodrel. A carbon–carbon triple bond is also present in marketed drugs such as the antiretroviral Efavirenz and the antifungal Terbinafine. Molecules called ene-diynes feature a ring containing an alkene ("ene") between two alkyne groups ("diyne"). These compounds, e.g. calicheamicin, are some of the most aggressive antitumor drugs known, so much so that the ene-diyne subunit is sometimes referred to as a "warhead". Ene-diynes undergo rearrangement via the Bergman cyclization, generating highly reactive radical intermediates that attack DNA within the tumor. See also -yne cycloalkyne References

2764

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

AbiWord

AbiWord () is a free and open-source software word processor. It is written in C++ and since version 3 it is based on GTK+ 3. The name "AbiWord" is derived from the root of the Spanish word "abierto", meaning "open". AbiWord was originally started by SourceGear Corporation as the first part of a proposed AbiSuite but was adopted by open source developers after SourceGear changed its business focus and ceased development. It now runs on Linux, ReactOS, Solaris, AmigaOS 4.0 (through its Cygwin X11 engine), MeeGo (on the Nokia N9 smartphone), Maemo (on the Nokia N810), QNX and other operating systems. Development of a version for Microsoft Windows has ended due to lack of maintainers (the latest released versions are 2.8.6 and 2.9.4 beta ). The macOS port has remained on version 2.4 since 2005, although the current version does run non-natively on macOS through XQuartz. AbiWord is part of the AbiSource project which develops a number of office-related technologies. Abiword is one of the rare text processing software which allows local users to edit simultaneously a same shared document in a local network, without the requirement of an Internet connection, since 2009. Features AbiWord supports both basic word processing features such as lists, indents and character formats, and more sophisticated features including tables, styles, page headers and footers, footnotes, templates, multiple views, page columns, spell checking, and grammar checking. Starting with version 2.8.0, AbiWord includes a collaboration plugin that allows integration with AbiCollab.net, a Web-based service that permits multiple users to work on the same document in real time, in full synchronization. The Presentation view of AbiWord, which permits easy display of presentations created in AbiWord on "screen-sized" pages, is another feature not often found in word processors. Interface AbiWord generally works similarly to classic versions (pre-Office 2007) of Microsoft Word, as direct ease of migration was a high priority early goal. While many interface similarities remain, cloning the Word interface is no longer a top priority. The interface is intended to follow user interface guidelines for each respective platform. File formats AbiWord comes with several import and export filters providing a partial support for such formats as HTML, Microsoft Word (.doc), Office Open XML (.docx), OpenDocument Text (.odt), Rich Text Format (.rtf), and text documents (.txt). LaTeX is supported for export only. Plug-in filters are available to deal with many other formats, notably WordPerfect documents. The native file format, .abw, uses XML, so as to mitigate vendor lock-in concerns with respect to interoperability and digital archiving. Grammar checking The AbiWord project includes a US English-only grammar checking plugin using Link Grammar. AbiWord had grammar checking before any other open source word processor, although a grammar checker was later added to OpenOffice.org. Link Grammar is both a theory of syntax and an open source parser which is now developed by the AbiWord project. See also List of free and open-source software packages List of word processors Comparison of word processors Office Open XML software OpenDocument software References External links Andrew Leonard: Abiword Up. Salon.com, November 15, 2002. History of the project and comparison with closed source development. Interview with Development team after 2.6 release AbiWord: A Small, Swift Word Processor Office software that uses GTK Free software programmed in C++ Free word processors Linux word processors MacOS word processors Windows word processors Cross-platform free software Portable software 1998 software Software using the GPL license

2766

https://en.wikipedia.org/wiki/Ames%20test

Ames test

The Ames test is a widely employed method that uses bacteria to test whether a given chemical can cause mutations in the DNA of the test organism. More formally, it is a biological assay to assess the mutagenic potential of chemical compounds. A positive test indicates that the chemical is mutagenic and therefore may act as a carcinogen, because cancer is often linked to mutation. The test serves as a quick and convenient assay to estimate the carcinogenic potential of a compound because standard carcinogen assays on mice and rats are time-consuming (taking two to three years to complete) and expensive. However, false-positives and false-negatives are known. The procedure was described in a series of papers in the early 1970s by Bruce Ames and his group at the University of California, Berkeley. General procedure The Ames test uses several strains of the bacterium Salmonella typhimurium that carry mutations in genes involved in histidine synthesis. These strains are auxotrophic mutants, i.e. they require histidine for growth, but cannot produce it. The method tests the capability of the tested substance in creating mutations that result in a return to a "prototrophic" state, so that the cells can grow on a histidine-free medium. The tester strains are specially constructed to detect either frameshift (e.g. strains TA-1537 and TA-1538) or point (e.g. strain TA-1531) mutations in the genes required to synthesize histidine, so that mutagens acting via different mechanisms may be identified. Some compounds are quite specific, causing reversions in just one or two strains. The tester strains also carry mutations in the genes responsible for lipopolysaccharide synthesis, making the cell wall of the bacteria more permeable, and in the excision repair system to make the test more sensitive. Larger organisms like mammals have metabolic processes that could potentially turn a chemical considered not mutagenic into one that is or one that is considered mutagenic into one that is not. Therefore, to more effectively test a chemical compound's mutagenicity in relation to larger organisms, rat liver enzymes can be added in an attempt to replicate the metabolic processes' effect on the compound being tested in the Ames Test. Rat liver extract is optionally added to simulate the effect of metabolism, as some compounds, like benzo[a]pyrene, are not mutagenic themselves but their metabolic products are. The bacteria are spread on an agar plate with small amount of histidine. This small amount of histidine in the growth medium allows the bacteria to grow for an initial time and have the opportunity to mutate. When the histidine is depleted only bacteria that have mutated to gain the ability to produce its own histidine will survive. The plate is incubated for 48 hours. The mutagenicity of a substance is proportional to the number of colonies observed. Ames test and carcinogens Mutagens identified via Ames test are also possible carcinogens, and early studies by Ames showed that 90% of known carcinogens may be identified via this test. Later studies however showed identification of 50–70% of known carcinogens. The test was used to identify a number of compounds previously used in commercial products as potential carcinogens. Examples include tris(2,3-dibromopropyl)phosphate, which was used as a flame retardant in plastic and textiles such as children's sleepwear, and furylfuramide which was used as an antibacterial additive in food in Japan in the 1960s and 1970s. Furylfuramide in fact had previously passed animal tests, but more vigorous tests after its identification in the Ames test showed it to be carcinogenic. Their positive tests resulted in those chemicals being withdrawn from use in consumer products. One interesting result from the Ames test is that the dose response curve using varying concentrations of the chemical is almost always linear, indicating that there is no threshold concentration for mutagenesis. It therefore suggests that, as with radiation, there may be no safe threshold for chemical mutagens or carcinogens. However, some have proposed that organisms could tolerate low levels of mutagens due to protective mechanisms such as DNA repair, and thus a threshold may exist for certain chemical mutagens. Bruce Ames himself argued against linear dose-response extrapolation from the high dose used in carcinogenesis tests in animal systems to the lower dose of chemicals normally encountered in human exposure, as the results may be false positives due to mitogenic response caused by the artificially high dose of chemicals used in such tests. He also cautioned against the "hysteria over tiny traces of chemicals that may or may not cause cancer", that "completely drives out the major risks you should be aware of". The Ames test is often used as one of the initial screens for potential drugs to weed out possible carcinogens, and it is one of the eight tests required under the Pesticide Act (USA) and one of the six tests required under the Toxic Substances Control Act (USA). Limitations Salmonella typhimurium is a prokaryote, therefore it is not a perfect model for humans. Rat liver S9 fraction is used to mimic the mammalian metabolic conditions so that the mutagenic potential of metabolites formed by a parent molecule in the hepatic system can be assessed; however, there are differences in metabolism between humans and rats that can affect the mutagenicity of the chemicals being tested. The test may therefore be improved by the use of human liver S9 fraction; its use was previously limited by its availability, but it is now available commercially and therefore may be more feasible. An adapted in vitro model has been made for eukaryotic cells, for example yeast. Mutagens identified in the Ames test need not necessarily be carcinogenic, and further tests are required for any potential carcinogen identified in the test. Drugs that contain the nitrate moiety sometimes come back positive for Ames when they are indeed safe. The nitrate compounds may generate nitric oxide, an important signal molecule that can give a false positive. Nitroglycerin is an example that gives a positive Ames yet is still used in treatment today. Nitrates in food however may be reduced by bacterial action to nitrites which are known to generate carcinogens by reacting with amines and amides. Long toxicology and outcome studies are needed with such compounds to disprove a positive Ames test. Fluctuation method The Ames test was initially developed using agar plates (the plate incorporation technique), as described above. Since that time, an alternative to performing the Ames test has been developed, which is known as the "fluctuation method". This technique is the same in concept as the agar-based method, with bacteria being added to a reaction mixture with a small amount of histidine, which allows the bacteria to grow and mutate, returning to synthesize their own histidine. By including a pH indicator, the frequency of mutation is counted in microplates as the number of wells which have changed color (caused by a drop in pH due to metabolic processes of reproducing bacteria). As with the traditional Ames test, the sample is compared to the natural background rate of reverse mutation in order to establish the genotoxicity of a substance. The fluctuation method is performed entirely in liquid culture and is scored by counting the number of wells that turn yellow from purple in 96-well or 384-well microplates. In the 96-well plate method the frequency of mutation is counted as the number of wells out of 96 which have changed color. The plates are incubated for up to five days, with mutated (yellow) colonies being counted each day and compared to the background rate of reverse mutation using established tables of significance to determine the significant differences between the background rate of mutation and that for the tested samples. In the more scaled-down 384-well plate microfluctuation method the frequency of mutation is counted as the number of wells out of 48 which have changed color after 2 days of incubation. A test sample is assayed across 6 dose levels with concurrent zero-dose (background) and positive controls which all fit into one 384-well plate. The assay is performed in triplicates to provide statistical robustness. It uses the recommended OECD Guideline 471 tester strains (histidine auxotrophs and tryptophan auxotrophs). The fluctuation method is comparable to the traditional pour plate method in terms of sensitivity and accuracy, however, it does have a number of advantages: it needs less test sample, it has a simple colorimetric endpoint, counting the number of positive wells out of possible 96 or 48 wells is much less time-consuming than counting individual colonies on an agar plate. Several commercial kits are available. Most kits have consumable components in a ready-to-use state, including lyophilized bacteria, and tests can be performed using multichannel pipettes. The fluctuation method also allows for testing higher volumes of aqueous samples (up to 75% v/v), increasing the sensitivity and extending its application to low-level environmental mutagens. References Further reading Applied genetics Laboratory techniques Toxicology tests

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https://en.wikipedia.org/wiki/ACE%20inhibitor

ACE inhibitor

Angiotensin-converting-enzyme inhibitors (ACE inhibitors) are a class of medication used primarily for the treatment of high blood pressure and heart failure. They work by causing relaxation of blood vessels as well as a decrease in blood volume, which leads to lower blood pressure and decreased oxygen demand from the heart. ACE inhibitors inhibit the activity of angiotensin-converting enzyme, an important component of the renin–angiotensin system which converts angiotensin I to angiotensin II, and hydrolyses bradykinin. Therefore, ACE inhibitors decrease the formation of angiotensin II, a vasoconstrictor, and increase the level of bradykinin, a peptide vasodilator. This combination is synergistic in lowering blood pressure. As a result of inhibiting the ACE enzyme in the bradykinin system, the ACE inhibitor drugs allow for increased levels of bradykinin which would normally be degraded. This mechanism can explain the two most common side effects seen with ACE Inhibitors: angioedema and cough. Bradykinin produces prostaglandin. Frequently prescribed ACE inhibitors include benazepril, zofenopril, perindopril, trandolapril, captopril, enalapril, lisinopril, and ramipril. Medical use ACE inhibitors were initially approved for the treatment of hypertension and can be used alone or in combination with other anti-hypertensive medications. Later, they were found useful for other cardiovascular and kidney diseases including: Acute myocardial infarction (heart attack) Heart failure (left ventricular systolic dysfunction) Kidney complications of diabetes mellitus (diabetic nephropathy) by means of decreasing the blood pressure and increasing perfusion in glomerular arterioles. In treating high blood pressure, ACE inhibitors are often the first drug choice, particularly when diabetes is present, but age can lead to different choices and it is common to need more than one drug to obtain the desired improvement. There are fixed-dose combination drugs, such as ACE inhibitor and thiazide combinations. ACE inhibitors have also been used in chronic kidney failure and kidney involvement in systemic sclerosis (hardening of tissues, as scleroderma renal crisis). In those with stable coronary artery disease, but no heart failure, benefits are similar to other usual treatments. In 2012, there was a meta-analysis published in the BMJ that described the protective role of ACE inhibitors in reducing the risk of pneumonia when compared to ARBs (Angiotensin II Receptor Blockers). The authors found a decreased risk in patients with previous stroke (54% risk reduction), with heart failure (37% risk reduction), and of Asian descent (43% risk reduction vs 54% risk reduction in non-Asian population). However, no reduced pneumonia related mortality was observed. Other ACE inhibitors may also be used to help decrease excessive water consumption in people with schizophrenia resulting in psychogenic polydipsia. A double-blind, placebo-controlled trial showed that when used for this purpose, enalapril led to decreased consumption (determined by urine output and osmolality) in 60% of people; the same effect has been demonstrated in other ACE inhibitors. Additionally ACEi are commonly used after renal transplant to manage post-transplant erythrocytosis, a condition characterised by a persistently high hematocrit greater than 51% which often develops 8-24 months after successful transplantation, as ACEi have been shown to decrease erythropoietin production. Adverse effects Common side effects include: low blood pressure, cough, hyperkalemia, headache, dizziness, fatigue, nausea, and kidney impairment. The main adverse effects of ACE inhibition can be understood from their pharmacological action. The other reported adverse effects are liver problems and effects on the fetus. Kidney problems may occur with all ACE inhibitors that directly follows from their mechanism of action. Patients starting on an ACE inhibitor usually have a modest reduction in glomerular filtration rate (GFR). However, the decrease may be significant in conditions of pre-existing decreased renal perfusions, such as renal artery stenosis, heart failure, polycystic kidney disease, or volume depletion. In these patients, the maintenance of GFR depends on angiotensin-II-dependent efferent vasomotor tone. Therefore, renal function should be closely monitored over the first few days after initiation of treatment with ACE inhibitor in patients with decreased renal perfusion. A moderate reduction in renal function, no greater than 30% rise in serum creatinine, that is stabilized after a week of treatment is deemed acceptable as part of the therapeutic effect, providing the residual renal function is sufficient. Reduced GFR is especially a problem if the patient is concomitantly taking an NSAID and a diuretic. When the three drugs are taken together, the risk of developing renal failure is significantly increased. High blood potassium is another possible complication of treatment with an ACE inhibitor due to its effect on aldosterone. Suppression of angiotensin II leads to a decrease in aldosterone levels. Since aldosterone is responsible for increasing the excretion of potassium, ACE inhibitors can cause retention of potassium. Some people, however, can continue to lose potassium while on an ACE inhibitor. Hyperkalemia may decrease the velocity of impulse conduction in the nerves and muscles, including cardiac tissues. This leads to cardiac dysfunction and neuromuscular consequences, such as muscle weakness, paresthesia, nausea, diarrhea, and others. Close monitoring of potassium levels is required in patients receiving treatment with ACE inhibitors who are at risk of hyperkalemia. Another possible adverse effect specific for ACE inhibitors, but not for other RAAS blockers, is an increase in bradykinin level. A persistent dry cough is a relatively common adverse effect believed to be associated with the increases in bradykinin levels produced by ACE inhibitors, although the role of bradykinin in producing these symptoms has been disputed. Many cases of cough in people on ACE inhibitors may not be from the medication itself, however. People who experience this cough are often switched to angiotensin II receptor antagonists. Some (0.7%) develop angioedema due to increased bradykinin levels. A genetic predisposition may exist. A severe rare allergic reaction can affect the bowel wall and secondarily cause abdominal pain. Blood Hematologic effects, such as neutropenia, agranulocytosis and other blood dyscrasias, have occurred during therapy with ACE inhibitors, especially in people with additional risk factors. Pregnancy In pregnant women, ACE inhibitors taken during all the trimesters have been reported to cause congenital malformations, stillbirths, and neonatal deaths. Commonly reported fetal abnormalities include hypotension, renal dysplasia, anuria/oliguria, oligohydramnios, intrauterine growth retardation, pulmonary hypoplasia, patent ductus arteriosus, and incomplete ossification of the skull. Overall, about half of newborns exposed to ACE inhibitors are adversely affected, leading to birth defects. ACE inhibitors are ADEC pregnancy category D and should be avoided in women who are likely to become pregnant. In the U.S., ACE inhibitors must be labeled with a boxed warning concerning the risk of birth defects when taken during the second and third trimester. Their use in the first trimester is also associated with a risk of major congenital malformations, particularly affecting the cardiovascular and central nervous systems. Overdose Symptoms and Treatment: There are few reports of ACE inhibitor overdose in the literature. The most likely manifestations are hypotension, which may be severe, hyperkalemia, hyponatremia and renal impairment with metabolic acidosis. Treatment should be mainly symptomatic and supportive, with volume expansion using normal saline to correct hypotension and improve renal function, and gastric lavage followed by activated charcoal and a cathartic to prevent further absorption of the drug. Captopril, enalapril, lisinopril and perindopril are known to be removable by hemodialysis. Contraindications and precautions The ACE inhibitors are contraindicated in people with: Pregnancy or breastfeeding Previous angioedema associated with ACE inhibitor therapy Bilateral renal artery stenosis Hypersensitivity to ACE inhibitors ACE inhibitors should be used with caution in people with: Impaired renal function Aortic valve stenosis or cardiac outflow obstruction Hypovolemia or dehydration Hemodialysis with high-flux polyacrylonitrile membranes A combination of ACE inhibitor with other drugs may increase effects of these drugs, but also the risk of adverse effects. The commonly reported adverse effects of drug combination with ACE are acute renal failure, hypotension, and hyperkalemia. The drugs interacting with ACE inhibitor should be prescribed with caution. Special attention should be given to combinations of ACE inhibitor with other RAAS blockers, diuretics (especially potassium-sparing diuretics), NSAIDs, anticoagulants, cyclosporine, DPP-4 inhibitors, and potassium supplements. Potassium supplementation should be used with caution and under medical supervision owing to the hyperkalemic effect of ACE inhibitors. Concomitant use with cyclooxygenase inhibitors tends to decrease ACE inhibitor's hypotensive effect. Mechanism of action ACE inhibitors reduce the activity of the renin–angiotensin–aldosterone system (RAAS) as the primary etiologic (causal) event in the development of hypertension in people with diabetes mellitus, as part of the insulin-resistance syndrome or as a manifestation of renal disease. Renin–angiotensin–aldosterone system The renin–angiotensin–aldosterone system is a major blood pressure regulating mechanism. Markers of electrolyte and water imbalance in the body such as hypotension, low distal tubule sodium concentration, decreased blood volume and high sympathetic tone trigger the release of the enzyme renin from the cells of juxtaglomerular apparatus in the kidney. Renin activates a circulating liver derived prohormone angiotensinogen by proteolytic cleavage of all but its first ten amino acid residues known as angiotensin I. ACE (angiotensin converting enzyme) then removes a further two residues, converting angiotensin I into angiotensin II. ACE is found in the pulmonary circulation and in the endothelium of many blood vessels. The system increases blood pressure by increasing the amount of salt and water the body retains, although angiotensin is also very good at causing the blood vessels to tighten (a potent vasoconstrictor). Effects ACE inhibitors block the conversion of angiotensin I (ATI) to angiotensin II (ATII). They thereby lower arteriolar resistance and increase venous capacity; decrease cardiac output, cardiac index, stroke work, and volume; lower resistance in blood vessels in the kidneys; and lead to increased natriuresis (excretion of sodium in the urine). Renin increases in concentration in the blood as a result of negative feedback of conversion of ATI to ATII. ATI increases for the same reason; ATII and aldosterone decrease. Bradykinin increases because of less inactivation by ACE. Under normal conditions, angiotensin II has these effects: Vasoconstriction (narrowing of blood vessels) and vascular smooth muscle hypertrophy (enlargement) induced by ATII may lead to increased blood pressure and hypertension. Further, constriction of the efferent arterioles of the kidney leads to increased perfusion pressure in the glomeruli. It contributes to ventricular remodeling and ventricular hypertrophy of the heart through stimulation of the proto-oncogenes c-fos, c-jun, c-myc, transforming growth factor beta (TGF-B), through fibrogenesis and apoptosis (programmed cell death). Stimulation by ATII of the adrenal cortex to release aldosterone, a hormone that acts on kidney tubules, causes sodium and chloride ions retention and potassium excretion. Sodium is a "water-holding" ion, so water is also retained, which leads to increased blood volume, hence an increase in blood pressure. Stimulation of the posterior pituitary to release vasopressin (antidiuretic hormone, ADH) also acts on the kidneys to increase water retention. If ADH production is excessive in heart failure, Na+ level in the plasma may fall (hyponatremia), and this is a sign of increased risk of death in heart failure patients. A decrease renal protein kinase C During the course of ACE inhibitor use, the production of ATII is decreased, which prevents aldosterone release from the adrenal cortex. This allows the kidney to excrete sodium ions along with obligate water, and retain potassium ions. This decreases blood volume, leading to decreased blood pressure. Epidemiological and clinical studies have shown ACE inhibitors reduce the progress of diabetic nephropathy independently from their blood pressure-lowering effect. This action of ACE inhibitors is used in the prevention of diabetic renal failure. ACE inhibitors have been shown to be effective for indications other than hypertension even in patients with normal blood pressure. The use of a maximum dose of ACE inhibitors in such patients (including for prevention of diabetic nephropathy, congestive heart failure, and prophylaxis of cardiovascular events) is justified, because it improves clinical outcomes independently of the blood pressure-lowering effect of ACE inhibitors. Such therapy, of course, requires careful and gradual titration of the dose to prevent the effects of rapidly decreasing blood pressure (dizziness, fainting, etc.). ACE inhibitors have also been shown to cause a central enhancement of parasympathetic nervous system activity in healthy volunteers and patients with heart failure. This action may reduce the prevalence of malignant cardiac arrhythmias, and the reduction in sudden death reported in large clinical trials. ACE Inhibitors also reduce plasma norepinephrine levels, and its resulting vasoconstriction effects, in heart failure patients, thus breaking the vicious circles of sympathetic and renin angiotensin system activation, which sustains the downward spiral in cardiac function in congestive heart failure The ACE inhibitor enalapril has also been shown to reduce cardiac cachexia in patients with chronic heart failure. Cachexia is a poor prognostic sign in patients with chronic heart failure. ACE inhibitors are under early investigation for the treatment of frailty and muscle wasting (sarcopenia) in elderly patients without heart failure. Examples ACE inhibitors are easily identifiable by their common suffix, '-pril'. ACE inhibitors can be divided into three groups based on their molecular structure of the enzyme binding sites (sulfhydryl, phosphinyl, carboxyl) to the active center of ACE: Sulfhydryl-containing agents Alacepril Captopril (trade name Capoten), the first ACE inhibitor. Zofenopril These agents appear to show antioxidative properties but may be involved in adverse events such as skin eruptions. Dicarboxylate-containing agents This is the largest group, including: Enalapril (Vasotec/Renitec/Berlipril/Enap/Enalapril Profarma) Ramipril (Altace/Prilace/Ramace/Ramiwin/Triatec/Tritace/Ramitac) Quinapril (Accupril) Perindopril (Coversyl/Aceon/Perindo) Lisinopril (Listril/Lopril/Novatec/Prinivil/Zestril, Lisidigal) Benazepril (Lotensin) Imidapril (Tanatril) Trandolapril (Mavik/Odrik/Gopten) Cilazapril (Inhibace) Phosphonate-containing agents Fosinopril (Fositen/Monopril) is the only member of this group Naturally occurring A comprehensive resource on anti-hypertensive peptides is available in form of a database. It contains around 1700 unique antihypertensive peptides Arfalasin (HOE 409) is angiotensin antagonist. Dairy products Casokinins and lactokinins, breakdown products of casein and whey, occur naturally after ingestion of milk products, especially cultured milk. Their role in blood pressure control is uncertain. The lactotripeptides Val-Pro-Pro and Ile-Pro-Pro produced by the probiotic Lactobacillus helveticus or derived from casein have been shown to have ACE-inhibiting and antihypertensive functions. In one study, L. helveticus PR4 was isolated from Italian cheeses. Comparative information All ACE inhibitors have similar antihypertensive efficacy when equivalent doses are administered. The main differences lie with captopril, the first ACE inhibitor. Captopril has a shorter duration of action and an increased incidence of adverse effects. It is also the only ACE inhibitor capable of passing through the blood–brain barrier, although the significance of this characteristic has not been shown to have any positive clinical effects. In a large clinical study, one of the agents in the ACE inhibitor class, ramipril (Altace), demonstrated an ability to reduce the mortality rates of patients suffering from a myocardial infarction and to slow the subsequent development of heart failure. This finding was made after it was discovered that regular use of ramipril reduced mortality rates even in test subjects not having suffered from hypertension. Some believe ramipril's additional benefits may be shared by some or all drugs in the ACE-inhibitor class. However, ramipril currently remains the only ACE inhibitor for which such effects are actually evidence-based. A meta-analysis confirmed that ACE inhibitors are effective and certainly the first-line choice in hypertension treatment. This meta-analysis was based on 20 trials and a cohort of 158,998 patients, of whom 91% were hypertensive. ACE inhibitors were used as the active treatment in seven trials (n=76,615) and angiotensin receptor blocker (ARB) in 13 trials (n=82,383). ACE inhibitors were associated with a statistically significant 10% mortality reduction: (HR 0.90; 95% CI, 0.84–0.97; P=0.004). In contrast, no significant mortality reduction was observed with ARB treatment (HR 0.99; 95% CI, 0.94–1.04; P=0.683). Analysis of mortality reduction by different ACE inhibitors showed that perindopril-based regimens are associated with a statistically significant 13% all-cause mortality reduction. Taking into account the broad spectrum of the hypertensive population, one might expect that an effective treatment with ACE inhibitors, in particular with perindopril, would result in an important gain of lives saved. Equivalent doses in hypertension The ACE inhibitors have different strengths with different starting dosages. Dosage should be adjusted according to the clinical response. Angiotensin II receptor antagonists ACE inhibitors possess many common characteristics with another class of cardiovascular drugs, angiotensin II receptor antagonists, which are often used when patients are intolerant of the adverse effects produced by ACE inhibitors. ACE inhibitors do not completely prevent the formation of angiotensin II, as blockage is dose-dependent, so angiotensin II receptor antagonists may be useful because they act to prevent the action of angiotensin II at the AT1 receptor, leaving AT2 receptor unblocked; the latter may have consequences needing further study. Use in combination The combination therapy of angiotensin II receptor antagonists with ACE inhibitors may be superior to either agent alone. This combination may increase levels of bradykinin while blocking the generation of angiotensin II and its activity at the AT1 receptor. This 'dual blockade' may be more effective than using an ACE inhibitor alone, because angiotensin II can be generated via non-ACE-dependent pathways. Preliminary studies suggest this combination of pharmacologic agents may be advantageous in the treatment of essential hypertension, chronic heart failure, and nephropathy. However, the more recent ONTARGET study showed no benefit of combining the agents and more adverse events. While statistically significant results have been obtained for its role in treating hypertension, clinical significance may be lacking. There are warnings about the combination of ACE inhibitors with ARBs. Patients with heart failure may benefit from the combination in terms of reducing morbidity and ventricular remodeling. The most compelling evidence for the treatment of nephropathy has been found: This combination therapy partially reversed the proteinuria and also exhibited a renoprotective effect in patients afflicted with diabetic nephropathy, and pediatric IgA nephropathy. History Leonard T. Skeggs and his colleagues (including Norman Shumway) discovered ACE in plasma in 1956. It was also noted that those who worked in banana plantations in South-western Brazil collapsed after being bitten by a pit viper, leading to a search for a blood pressure lowering component in its venom. Brazilian scientist Sérgio Henrique Ferreira reported a bradykinin-potentiating factor (BPF) present in the venom of Bothrops jararaca, a South American pit viper, in 1965. Ferreira then went to John Vane's laboratory as a postdoctoral fellow with his already-isolated BPF. The conversion of the inactive angiotensin I to the potent angiotensin II was thought to take place in the plasma. However, in 1967, Kevin K. F. Ng and John R. Vane showed plasma ACE is too slow to account for the conversion of angiotensin I to angiotensin II in vivo. Subsequent investigation showed rapid conversion occurs during its passage through the pulmonary circulation. Bradykinin is rapidly inactivated in the circulating blood, and it disappears completely in a single pass through the pulmonary circulation. Angiotensin I also disappears in the pulmonary circulation because of its conversion to angiotensin II. Furthermore, angiotensin II passes through the lungs without any loss. The inactivation of bradykinin and the conversion of angiotensin I to angiotensin II in the lungs was thought to be caused by the same enzyme. In 1970, Ng and Vane, using BPF provided by Ferreira, showed the conversion is inhibited during its passage through the pulmonary circulation. BPFs are members of a family of peptides whose potentiating action is linked to inhibition of bradykinin by ACE. Molecular analysis of BPF yielded a nonapeptide BPF teprotide (SQ 20,881), which showed the greatest ACE inhibition potency and hypotensive effect in vivo. Teprotide had limited clinical value as a result of its peptide nature and lack of activity when given orally. In the early 1970s, knowledge of the structure-activity relationship required for inhibition of ACE was growing. David Cushman, Miguel Ondetti and colleagues used peptide analogues to study the structure of ACE, using carboxypeptidase A as a model. Their discoveries led to the development of captopril, the first orally-active ACE inhibitor, in 1975. Captopril was approved by the United States Food and Drug Administration in 1981. The first nonsulfhydryl-containing ACE inhibitor, enalapril, was marketed two years later. At least 12 other ACE inhibitors have since been marketed. In 1991, Japanese scientists created the first milk-based ACE inhibitor, in the form of a fermented milk drink, using specific cultures to liberate the tripeptide isoleucine-proline-proline (IPP) from the dairy protein. Valine-proline-proline (VPP) is also liberated in this process—another milk tripeptide with a very similar chemical structure to IPP. Together, these peptides are now often referred to as lactotripeptides. In 1996, the first human study confirmed the blood pressure-lowering effect of IPP in fermented milk. Although twice the amount of VPP is needed to achieve the same ACE-inhibiting activity as the originally discovered IPP, VPP also is assumed to add to the total blood pressure lowering effect. Since the first lactotripeptides discovery, more than 20 human clinical trials have been conducted in many different countries. Note See also Angiotensin II receptor blocker Discovery and development of angiotensin receptor blockers Loop diuretic, also used to treat CHF Renin inhibitor References External links ACE Inhibitors: Summary of Recommendations – Consumer Reports Best Buy Drugs – free public education project ACE inhibitors

2769

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

Antianginal

An antianginal is a drug used in the treatment of angina pectoris, a symptom of ischaemic heart disease. Examples Drugs used are nitrates, beta blockers, or calcium channel blockers. Nitrates Nitrates cause vasodilation of the venous capacitance vessels by stimulating the endothelium-derived relaxing factor (EDRF). Used to relieve both exertional and vasospastic angina by allowing venous pooling, reducing the pressure in the ventricles and so reducing wall tension and oxygen requirements in, the heart. Short-acting nitrates are used to abort angina attacks that have occurred, while longer-acting nitrates are used in the prophylactic management of the condition. Agents include glyceryl trinitrate (GTN), pentaerythritol tetranitrate, isosorbide dinitrate and isosorbide mononitrate. Beta blockers Beta blockers are used in the prophylaxis of exertional angina by reducing the myocardial oxygen demand below the level that would provoke an angina attack. They are contraindicated in variant angina and can precipitate heart failure. They are also contraindicated in severe asthmatics due to bronchoconstriction, and should be used cautiously in diabetics as they can mask symptoms of hypoglycemia. Agents include either cardioselectives such as acebutolol or metoprolol, or non-cardioselectives such as oxprenolol or sotalol. Calcium channel blockers Calcium ion (Ca++) antagonists (Calcium channel blockers) are used in the treatment of chronic stable angina, and most effectively in the treatment of variant angina (directly preventing coronary artery vasospasm). They are not used in the treatment of unstable angina . In vitro, they dilate the coronary and peripheral arteries and have negative inotropic and chronotropic effects - decreasing afterload, improving myocardial efficiency, reducing heart rate and improving coronary blood flow. In vivo, the vasodilation and hypotension trigger the baroreceptor reflex. Therefore, the net effect is the interplay of direct and reflex actions. Class I agents have the most potent negative inotropic effect and may cause heart failure. Class II agents do not depress conduction or contractility. Class III agent has negligible inotropic effect and causes almost no reflex tachycardia. Examples include Class I agents (e.g., verapamil), Class II agents (e.g., amlodipine, nifedipine), or the Class III agent diltiazem. Nifedipine is more a potent vasodilator and more effective in angina. It is in the class of dihydropyridines and does not affect refractory period on SA node conduction. References

2770

https://en.wikipedia.org/wiki/Anatomical%20Therapeutic%20Chemical%20Classification%20System

Anatomical Therapeutic Chemical Classification System

The Anatomical Therapeutic Chemical (ATC) Classification System is a drug classification system that classifies the active ingredients of drugs according to the organ or system on which they act and their therapeutic, pharmacological and chemical properties. Its purpose is an aid to monitor drug use and for research to improve quality medication use. It does not imply drug recommendation or efficacy. It is controlled by the World Health Organization Collaborating Centre for Drug Statistics Methodology (WHOCC), and was first published in 1976. Coding system This pharmaceutical coding system divides drugs into different groups according to the organ or system on which they act, their therapeutic intent or nature, and the drug's chemical characteristics. Different brands share the same code if they have the same active substance and indications. Each bottom-level ATC code stands for a pharmaceutically used substance, or a combination of substances, in a single indication (or use). This means that one drug can have more than one code, for example acetylsalicylic acid (aspirin) has as a drug for local oral treatment, as a platelet inhibitor, and as an analgesic and antipyretic; as well as one code can represent more than one active ingredient, for example is the combination of perindopril with amlodipine, two active ingredients that have their own codes ( and respectively) when prescribed alone. The ATC classification system is a strict hierarchy, meaning that each code necessarily has one and only one parent code, except for the 14 codes at the topmost level which have no parents. The codes are semantic identifiers, meaning they depict information by themselves beyond serving as identifiers (namely, the codes depict themselves the complete lineage of parenthood). As of 7 May 2020, there are 6,331 codes in ATC; the table below gives the count per level. History The ATC system is based on the earlier Anatomical Classification System, which is intended as a tool for the pharmaceutical industry to classify pharmaceutical products (as opposed to their active ingredients). This system, confusingly also called ATC, was initiated in 1971 by the European Pharmaceutical Market Research Association (EphMRA) and is being maintained by the EphMRA and Intellus. Its codes are organised into four levels. The WHO's system, having five levels, is an extension and modification of the EphMRA's. It was first published in 1976. Classification In this system, drugs are classified into groups at five different levels: First level The first level of the code indicates the anatomical main group and consists of one letter. There are 14 main groups: Example: C Cardiovascular system Second level The second level of the code indicates the therapeutic subgroup and consists of two digits. Example: C03 Diuretics Third level The third level of the code indicates the therapeutic/pharmacological subgroup and consists of one letter. Example: C03C High-ceiling diuretics Fourth level The fourth level of the code indicates the chemical/therapeutic/pharmacological subgroup and consists of one letter. Example: C03CA Sulfonamides Fifth level The fifth level of the code indicates the chemical substance and consists of two digits. Example: C03CA01 furosemide Other ATC classification systems ATCvet The Anatomical Therapeutic Chemical Classification System for veterinary medicinal products (ATCvet) is used to classify veterinary drugs. ATCvet codes can be created by placing the letter Q in front of the ATC code of most human medications. For example, furosemide for veterinary use has the code QC03CA01. Some codes are used exclusively for veterinary drugs, such as QI Immunologicals, QJ51 Antibacterials for intramammary use or QN05AX90 amperozide. Herbal ATC (HATC) The Herbal ATC system (HATC) is an ATC classification of herbal substances; it differs from the regular ATC system by using 4 digits instead of 2 at the 5th level group. The herbal classification is not adopted by WHO. The Uppsala Monitoring Centre is responsible for the Herbal ATC classification, and it is part of the WHODrug Global portfolio available by subscription. Defined daily dose The ATC system also includes defined daily doses (DDDs) for many drugs. This is a measurement of drug consumption based on the usual daily dose for a given drug. According to the definition, "[t]he DDD is the assumed average maintenance dose per day for a drug used for its main indication in adults." Adaptations and updates National issues of the ATC classification, such as the German Anatomisch-therapeutisch-chemische Klassifikation mit Tagesdosen, may include additional codes and DDDs not present in the WHO version. ATC follows guidelines in creating new codes for newly approved drugs. An application is submitted to WHO for ATC classification and DDD assignment. A preliminary or temporary code is assigned and published on the website and in the WHO Drug Information for comment or objection. New ATC/DDD codes are discussed at the semi-annual Working Group meeting. If accepted it becomes a final decision and published semi-annually on the website and WHO Drug Information and implemented in the annual print/on-line ACT/DDD Index on January 1. Changes to existing ATC/DDD follow a similar process to become temporary codes and if accepted become a final decision as ATC/DDD alterations. ATC and DDD alterations are only valid and implemented in the coming annual updates; the original codes must continue until the end of the year. An updated version of the complete on-line/print ATC index with DDDs is published annually on January 1. See also Classification of Pharmaco-Therapeutic Referrals (CPR) ICD-10 International Classification of Diseases International Classification of Primary Care (ICPC-2) / ICPC-2 PLUS Medical classification Pharmaceutical care Pharmacotherapy RxNorm References External links Quarterly journal providing an overview of topics relating to medicines development and regulation. from EphMRA Anatomical Classification (ATC and NFC) atcd. R script to scrape the ATC data from the WHOCC website; contains link to download entire ATC tree. Drugs Pharmacological classification systems World Health Organization

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https://en.wikipedia.org/wiki/Parallel%20ATA

Parallel ATA

Parallel ATA (PATA), originally , also known as ATA or IDE is standard interface designed for IBM PC-compatible computers. It was first developed by Western Digital and Compaq in 1986 for compatible hard drives and CD or DVD drives. The connection is used for storage devices such as hard disk drives, floppy disk drives, and optical disc drives in computers. The standard is maintained by the X3/INCITS committee. It uses the underlying (ATA) and Packet Interface (ATAPI) standards. The Parallel ATA standard is the result of a long history of incremental technical development, which began with the original AT Attachment interface, developed for use in early PC AT equipment. The ATA interface itself evolved in several stages from Western Digital's original Integrated Drive Electronics (IDE) interface. As a result, many near-synonyms for ATA/ATAPI and its previous incarnations are still in common informal use, in particular Extended IDE (EIDE) and Ultra ATA (UATA). After the introduction of Serial ATA (SATA) in 2003, the original ATA was renamed to Parallel ATA, or PATA for short. Parallel ATA cables have a maximum allowable length of . Because of this limit, the technology normally appears as an internal computer storage interface. For many years, ATA provided the most common and the least expensive interface for this application. It has largely been replaced by SATA in newer systems. History and terminology The standard was originally conceived as the "AT Bus Attachment," officially called "AT Attachment" and abbreviated "ATA" because its primary feature was a direct connection to the 16-bit ISA bus introduced with the IBM PC/AT. The original ATA specifications published by the standards committees use the name "AT Attachment". The "AT" in the IBM PC/AT referred to "Advanced Technology" so ATA has also been referred to as "Advanced Technology Attachment". When a newer Serial ATA (SATA) was introduced in 2003, the original ATA was renamed to Parallel ATA, or PATA for short. Physical ATA interfaces became a standard component in all PCs, initially on host bus adapters, sometimes on a sound card but ultimately as two physical interfaces embedded in a Southbridge chip on a motherboard. Called the "primary" and "secondary" ATA interfaces, they were assigned to base addresses 0x1F0 and 0x170 on ISA bus systems. They were replaced by SATA interfaces. IDE and ATA-1 The first version of what is now called the ATA/ATAPI interface was developed by Western Digital under the name Integrated Drive Electronics (IDE). Together with Control Data Corporation (the hard drive manufacturer) and Compaq Computer (the initial customer), they developed the connector, the signaling protocols and so on, with the goal of remaining software compatible with the existing ST-506 hard drive interface. The first such drives appeared internally in Compaq PCs in 1986. and were first separately offered by Conner Peripherals as the CP342 in June 1987. The term Integrated Drive Electronics refers not just to the connector and interface definition, but also to the fact that the drive controller is integrated into the drive, as opposed to a separate controller on or connected to the motherboard. The interface cards used to connect a parallel ATA drive to, for example, a PCI slot are not drive controllers: they are merely bridges between the host bus and the ATA interface. Since the original ATA interface is essentially just a 16-bit ISA bus in disguise, the bridge was especially simple in case of an ATA connector being located on an ISA interface card. The integrated controller presented the drive to the host computer as an array of 512-byte blocks with a relatively simple command interface. This relieved the mainboard and interface cards in the host computer of the chores of stepping the disk head arm, moving the head arm in and out, and so on, as had to be done with earlier ST-506 and ESDI hard drives. All of these low-level details of the mechanical operation of the drive were now handled by the controller on the drive itself. This also eliminated the need to design a single controller that could handle many different types of drives, since the controller could be unique for the drive. The host need only to ask for a particular sector, or block, to be read or written, and either accept the data from the drive or send the data to it. The interface used by these drives was standardized in 1994 as ANSI standard X3.221-1994, AT Attachment Interface for Disk Drives. After later versions of the standard were developed, this became known as "ATA-1". A short-lived, seldom-used implementation of ATA was created for the IBM XT and similar machines that used the 8-bit version of the ISA bus. It has been referred to as "XT-IDE", "XTA" or "XT Attachment". EIDE and ATA-2 In 1994, about the same time that the ATA-1 standard was adopted, Western Digital introduced drives under a newer name, Enhanced IDE (EIDE). These included most of the features of the forthcoming ATA-2 specification and several additional enhancements. Other manufacturers introduced their own variations of ATA-1 such as "Fast ATA" and "Fast ATA-2". The new version of the ANSI standard, AT Attachment Interface with Extensions ATA-2 (X3.279-1996), was approved in 1996. It included most of the features of the manufacturer-specific variants. ATA-2 also was the first to note that devices other than hard drives could be attached to the interface: ATAPI As mentioned in the previous sections, ATA was originally designed for, and worked only with hard disk drives and devices that could emulate them. The introduction of ATAPI (ATA Packet Interface) by a group called the Small Form Factor committee (SFF) allowed ATA to be used for a variety of other devices that require functions beyond those necessary for hard disk drives. For example, any removable media device needs a "media eject" command, and a way for the host to determine whether the media is present, and these were not provided in the ATA protocol. The Small Form Factor committee approached this problem by defining ATAPI, the "ATA Packet Interface". ATAPI is actually a protocol allowing the ATA interface to carry SCSI commands and responses; therefore, all ATAPI devices are actually "speaking SCSI" other than at the electrical interface. In fact, some early ATAPI devices were simply SCSI devices with an ATA/ATAPI to SCSI protocol converter added on. The SCSI commands and responses are embedded in "packets" (hence "ATA Packet Interface") for transmission on the ATA cable. This allows any device class for which a SCSI command set has been defined to be interfaced via ATA/ATAPI. ATAPI devices are also "speaking ATA", as the ATA physical interface and protocol are still being used to send the packets. On the other hand, ATA hard drives and solid state drives do not use ATAPI. ATAPI devices include CD-ROM and DVD-ROM drives, tape drives, and large-capacity floppy drives such as the Zip drive and SuperDisk drive. The SCSI commands and responses used by each class of ATAPI device (CD-ROM, tape, etc.) are described in other documents or specifications specific to those device classes and are not within ATA/ATAPI or the T13 committee's purview. One commonly used set is defined in the MMC SCSI command set. ATAPI was adopted as part of ATA in INCITS 317-1998, AT Attachment with Packet Interface Extension (ATA/ATAPI-4). UDMA and ATA-4 The ATA/ATAPI-4 standard also introduced several "Ultra DMA" transfer modes. These initially supported speeds from 16 MByte/s to 33 MByte/second. In later versions, faster Ultra DMA modes were added, requiring new 80-wire cables to reduce crosstalk. The latest versions of Parallel ATA support up to 133 MByte/s. Ultra ATA Ultra ATA, abbreviated UATA, is a designation that has been primarily used by Western Digital for different speed enhancements to the ATA/ATAPI standards. For example, in 2000 Western Digital published a document describing "Ultra ATA/100", which brought performance improvements for the then-current ATA/ATAPI-5 standard by improving maximum speed of the Parallel ATA interface from 66 to 100 MB/s. Most of Western Digital's changes, along with others, were included in the ATA/ATAPI-6 standard (2002). Current terminology The terms "integrated drive electronics" (IDE), "enhanced IDE" and "EIDE" have come to be used interchangeably with ATA (now Parallel ATA, or PATA). In addition, there have been several generations of "EIDE" drives marketed, compliant with various versions of the ATA specification. An early "EIDE" drive might be compatible with ATA-2, while a later one with ATA-6. Nevertheless, a request for an "IDE" or "EIDE" drive from a computer parts vendor will almost always yield a drive that will work with most Parallel ATA interfaces. Another common usage is to refer to the specification version by the fastest mode supported. For example, ATA-4 supported Ultra DMA modes 0 through 2, the latter providing a maximum transfer rate of 33 megabytes per second. ATA-4 drives are thus sometimes called "UDMA-33" drives, and sometimes "ATA-33" drives. Similarly, ATA-6 introduced a maximum transfer speed of 100 megabytes per second, and some drives complying with this version of the standard are marketed as "PATA/100" drives. x86 BIOS size limitations Initially, the size of an ATA drive was stored in the system x86 BIOS using a type number (1 through 45) that predefined the C/H/S parameters and also often the landing zone, in which the drive heads are parked while not in use. Later, a "user definable" format called C/H/S or cylinders, heads, sectors was made available. These numbers were important for the earlier ST-506 interface, but were generally meaningless for ATA—the CHS parameters for later ATA large drives often specified impossibly high numbers of heads or sectors that did not actually define the internal physical layout of the drive at all. From the start, and up to ATA-2, every user had to specify explicitly how large every attached drive was. From ATA-2 on, an "identify drive" command was implemented that can be sent and which will return all drive parameters. Owing to a lack of foresight by motherboard manufacturers, the system BIOS was often hobbled by artificial C/H/S size limitations due to the manufacturer assuming certain values would never exceed a particular numerical maximum. The first of these BIOS limits occurred when ATA drives reached sizes in excess of 504 MiB, because some motherboard BIOSes would not allow C/H/S values above 1024 cylinders, 16 heads, and 63 sectors. Multiplied by 512 bytes per sector, this totals bytes which, divided by bytes per MiB, equals 504 MiB (528 MB). The second of these BIOS limitations occurred at 1024 cylinders, 256 heads, and 63 sectors, and a problem in MS-DOS limited the number of heads to 255. This totals to bytes (8032.5 MiB), commonly referred to as the 8.4 gigabyte barrier. This is again a limit imposed by x86 BIOSes, and not a limit imposed by the ATA interface. It was eventually determined that these size limitations could be overridden with a tiny program loaded at startup from a hard drive's boot sector. Some hard drive manufacturers, such as Western Digital, started including these override utilities with new large hard drives to help overcome these problems. However, if the computer was booted in some other manner without loading the special utility, the invalid BIOS settings would be used and the drive could either be inaccessible or appear to the operating system to be damaged. Later, an extension to the x86 BIOS disk services called the "Enhanced Disk Drive" (EDD) was made available, which makes it possible to address drives as large as 264 sectors. Interface size limitations The first drive interface used 22-bit addressing mode which resulted in a maximum drive capacity of two gigabytes. Later, the first formalized ATA specification used a 28-bit addressing mode through LBA28, allowing for the addressing of 228 () sectors (blocks) of 512 bytes each, resulting in a maximum capacity of 128 GiB (137 GB). ATA-6 introduced 48-bit addressing, increasing the limit to 128 PiB (144 PB). As a consequence, any ATA drive of capacity larger than about 137 GB must be an ATA-6 or later drive. Connecting such a drive to a host with an ATA-5 or earlier interface will limit the usable capacity to the maximum of the interface. Some operating systems, including Windows XP pre-SP1, and Windows 2000 pre-SP3, disable LBA48 by default, requiring the user to take extra steps to use the entire capacity of an ATA drive larger than about 137 gigabytes. Older operating systems, such as Windows 98, do not support 48-bit LBA at all. However, members of the third-party group MSFN have modified the Windows 98 disk drivers to add unofficial support for 48-bit LBA to Windows 95 OSR2, Windows 98, Windows 98 SE and Windows ME. Some 16-bit and 32-bit operating systems supporting LBA48 may still not support disks larger than 2 TiB due to using 32-bit arithmetics only; a limitation also applying to many boot sectors. Primacy and obsolescence Parallel ATA (then simply called ATA or IDE) became the primary storage device interface for PCs soon after its introduction. In some systems, a third and fourth motherboard interface was provided, allowing up to eight ATA devices to be attached to the motherboard. Often, these additional connectors were implemented by inexpensive RAID controllers. Soon after the introduction of Serial ATA (SATA) in 2003, use of Parallel ATA declined. The first motherboards with built-in SATA interfaces usually had only a single PATA connector (for up to two PATA devices), along with multiple SATA connectors. Some PCs and laptops of the era have a SATA hard disk and an optical drive connected to PATA. As of 2007, some PC chipsets, for example the Intel ICH10, had removed support for PATA. Motherboard vendors still wishing to offer Parallel ATA with those chipsets must include an additional interface chip. In more recent computers, the Parallel ATA interface is rarely used even if present, as four or more Serial ATA connectors are usually provided on the motherboard and SATA devices of all types are common. With Western Digital's withdrawal from the PATA market, hard disk drives with the PATA interface were no longer in production after December 2013 for other than specialty applications. Parallel ATA interface Parallel ATA cables transfer data 16 bits at a time. The traditional cable uses 40-pin female connectors attached to a 40- or 80-conductor ribbon cable. Each cable has two or three connectors, one of which plugs into a host adapter interfacing with the rest of the computer system. The remaining connector(s) plug into storage devices, most commonly hard disk drives or optical drives. Each connector has 39 physical pins arranged into two rows, with a gap or key at pin 20. Round parallel ATA cables (as opposed to ribbon cables) were eventually made available for 'case modders' for cosmetic reasons, as well as claims of improved computer cooling and were easier to handle; however, only ribbon cables are supported by the ATA specifications. Pin 20 In the ATA standard, pin 20 is defined as a mechanical key and is not used. This pin's socket on the female connector is often obstructed, requiring pin 20 to be omitted from the male cable or drive connector; it is thus impossible to plug it in the wrong way round. However, some flash memory drives can use pin 20 as VCC_in to power the drive without requiring a special power cable; this feature can only be used if the equipment supports this use of pin 20. Pin 28 Pin 28 of the gray (slave/middle) connector of an 80-conductor cable is not attached to any conductor of the cable. It is attached normally on the black (master drive end) and blue (motherboard end) connectors. This enables cable select functionality. Pin 34 Pin 34 is connected to ground inside the blue connector of an 80-conductor cable but not attached to any conductor of the cable, allowing for detection of such a cable. It is attached normally on the gray and black connectors. 44-pin variant A 44-pin variant PATA connector is used for 2.5 inch drives inside laptops. The pins are closer together and the connector is physically smaller than the 40-pin connector. The extra pins carry power. 80-conductor variant ATA's cables have had 40 conductors for most of its history (44 conductors for the smaller form-factor version used for 2.5" drives—the extra four for power), but an 80-conductor version appeared with the introduction of the UDMA/66 mode. All of the additional conductors in the new cable are grounds, interleaved with the signal conductors to reduce the effects of capacitive coupling between neighboring signal conductors, reducing crosstalk. Capacitive coupling is more of a problem at higher transfer rates, and this change was necessary to enable the 66 megabytes per second (MB/s) transfer rate of UDMA4 to work reliably. The faster UDMA5 and UDMA6 modes also require 80-conductor cables. Though the number of conductors doubled, the number of connector pins and the pinout remain the same as 40-conductor cables, and the external appearance of the connectors is identical. Internally, the connectors are different; the connectors for the 80-conductor cable connect a larger number of ground conductors to the ground pins, while the connectors for the 40-conductor cable connect ground conductors to ground pins one-to-one. 80-conductor cables usually come with three differently colored connectors (blue, black, and gray for controller, master drive, and slave drive respectively) as opposed to uniformly colored 40-conductor cable's connectors (commonly all gray). The gray connector on 80-conductor cables has pin 28 CSEL not connected, making it the slave position for drives configured cable select. Differences between connectors The image on the right shows PATA connectors after removal of strain relief, cover, and cable. Pin one is at bottom left of the connectors, pin 2 is top left, etc., except that the lower image of the blue connector shows the view from the opposite side, and pin one is at top right. The connector is an insulation-displacement connector: each contact comprises a pair of points which together pierce the insulation of the ribbon cable with such precision that they make a connection to the desired conductor without harming the insulation on the neighboring conductors. The center row of contacts are all connected to the common ground bus and attach to the odd numbered conductors of the cable. The top row of contacts are the even-numbered sockets of the connector (mating with the even-numbered pins of the receptacle) and attach to every other even-numbered conductor of the cable. The bottom row of contacts are the odd-numbered sockets of the connector (mating with the odd-numbered pins of the receptacle) and attach to the remaining even-numbered conductors of the cable. Note the connections to the common ground bus from sockets 2 (top left), 19 (center bottom row), 22, 24, 26, 30, and 40 on all connectors. Also note (enlarged detail, bottom, looking from the opposite side of the connector) that socket 34 of the blue connector does not contact any conductor but unlike socket 34 of the other two connectors, it does connect to the common ground bus. On the gray connector, note that socket 28 is completely missing, so that pin 28 of the drive attached to the gray connector will be open. On the black connector, sockets 28 and 34 are completely normal, so that pins 28 and 34 of the drive attached to the black connector will be connected to the cable. Pin 28 of the black drive reaches pin 28 of the host receptacle but not pin 28 of the gray drive, while pin 34 of the black drive reaches pin 34 of the gray drive but not pin 34 of the host. Instead, pin 34 of the host is grounded. The standard dictates color-coded connectors for easy identification by both installer and cable maker. All three connectors are different from one another. The blue (host) connector has the socket for pin 34 connected to ground inside the connector but not attached to any conductor of the cable. Since the old 40 conductor cables do not ground pin 34, the presence of a ground connection indicates that an 80 conductor cable is installed. The conductor for pin 34 is attached normally on the other types and is not grounded. Installing the cable backwards (with the black connector on the system board, the blue connector on the remote device and the gray connector on the center device) will ground pin 34 of the remote device and connect host pin 34 through to pin 34 of the center device. The gray center connector omits the connection to pin 28 but connects pin 34 normally, while the black end connector connects both pins 28 and 34 normally. Multiple devices on a cable If two devices are attached to a single cable, one must be designated as Device 0 (in the past, commonly designated master) and the other as Device 1 (in the past, commonly designated as slave). This distinction is necessary to allow both drives to share the cable without conflict. The Device 0 drive is the drive that usually appears "first" to the computer's BIOS and/or operating system. In most personal computers the drives are often designated as "C:" for the Device 0 and "D:" for the Device 1 referring to one active primary partitions on each. The terms device and drive are used interchangeably in the industry, as in master drive or master device. The mode that a device must use is often set by a jumper setting on the device itself, which must be manually set to Device 0 (Master) or Device 1 (Slave). If there is a single device on a cable, it should be configured as Device 0. However, some certain era drives have a special setting called Single for this configuration (Western Digital, in particular). Also, depending on the hardware and software available, a Single drive on a cable will often work reliably even though configured as the Device 1 drive (most often seen where an optical drive is the only device on the secondary ATA interface). The words primary and secondary typically refers to the two IDE cables, which can have two drives each (primary master, primary slave, secondary master, secondary slave). Cable select A drive mode called cable select was described as optional in ATA-1 and has come into fairly widespread use with ATA-5 and later. A drive set to "cable select" automatically configures itself as Device 0 or Device 1, according to its position on the cable. Cable select is controlled by pin 28. The host adapter grounds this pin; if a device sees that the pin is grounded, it becomes the Device 0 device; if it sees that pin 28 is open, the device becomes the Device 1 device. This setting is usually chosen by a jumper setting on the drive called "cable select", usually marked CS, which is separate from the Device 0/1 setting. Note that if two drives are configured as Device 0 and Device 1 manually, this configuration does not need to correspond to their position on the cable. Pin 28 is only used to let the drives know their position on the cable; it is not used by the host when communicating with the drives. With the 40-conductor cable, it was very common to implement cable select by simply cutting the pin 28 wire between the two device connectors; putting the Device 1 device at the end of the cable, and the Device 0 on the middle connector. This arrangement eventually was standardized in later versions. If there is just one device on a 2-drive cable, using the middle connector, this results in an unused stub of cable, which is undesirable for physical convenience and electrical reasons. The stub causes signal reflections, particularly at higher transfer rates. Starting with the 80-conductor cable defined for use in ATAPI5/UDMA4, the Device 0 device goes at the far-from-the-host end of the cable on the black connector, the slave Device 1 goes on the gray middle connector, and the blue connector goes to the host (e.g. motherboard IDE connector, or IDE card). So, if there is only one (Device 0) device on a two-drive cable, using the black connector, there is no cable stub to cause reflections. Also, cable select is now implemented in the device 1 device connector, usually simply by omitting the contact from the connector body. Serialized, overlapped, and queued operations The parallel ATA protocols up through ATA-3 require that once a command has been given on an ATA interface, it must complete before any subsequent command may be given. Operations on the devices must be serializedwith only one operation in progress at a timewith respect to the ATA host interface. A useful mental model is that the host ATA interface is busy with the first request for its entire duration, and therefore can not be told about another request until the first one is complete. The function of serializing requests to the interface is usually performed by a device driver in the host operating system. The ATA-4 and subsequent versions of the specification have included an "overlapped feature set" and a "queued feature set" as optional features, both being given the name "Tagged Command Queuing" (TCQ), a reference to a set of features from SCSI which the ATA version attempts to emulate. However, support for these is extremely rare in actual parallel ATA products and device drivers because these feature sets were implemented in such a way as to maintain software compatibility with its heritage as originally an extension of the ISA bus. This implementation resulted in excessive CPU utilization which largely negated the advantages of command queuing. By contrast, overlapped and queued operations have been common in other storage buses; in particular, SCSI's version of tagged command queuing had no need to be compatible with APIs designed for ISA, allowing it to attain high performance with low overhead on buses which supported first party DMA like PCI. This has long been seen as a major advantage of SCSI. The Serial ATA standard has supported native command queueing (NCQ) since its first release, but it is an optional feature for both host adapters and target devices. Many obsolete PC motherboards do not support NCQ, but modern SATA hard disk drives and SATA solid-state drives usually support NCQ, which is not the case for removable (CD/DVD) drives because the ATAPI command set used to control them prohibits queued operations. Two devices on one cable—speed impact There are many debates about how much a slow device can impact the performance of a faster device on the same cable. There is an effect, but the debate is confused by the blurring of two quite different causes, called here "Lowest speed" and "One operation at a time". "Lowest speed" On early ATA host adapters, both devices' data transfers can be constrained to the speed of the slower device, if two devices of different speed capabilities are on the same cable. For all modern ATA host adapters, this is not true, as modern ATA host adapters support independent device timing. This allows each device on the cable to transfer data at its own best speed. Even with earlier adapters without independent timing, this effect applies only to the data transfer phase of a read or write operation. "One operation at a time" This is caused by the omission of both overlapped and queued feature sets from most parallel ATA products. Only one device on a cable can perform a read or write operation at one time; therefore, a fast device on the same cable as a slow device under heavy use will find it has to wait for the slow device to complete its task first. However, most modern devices will report write operations as complete once the data is stored in their onboard cache memory, before the data is written to the (slow) magnetic storage. This allows commands to be sent to the other device on the cable, reducing the impact of the "one operation at a time" limit. The impact of this on a system's performance depends on the application. For example, when copying data from an optical drive to a hard drive (such as during software installation), this effect probably will not matter. Such jobs are necessarily limited by the speed of the optical drive no matter where it is. But if the hard drive in question is also expected to provide good throughput for other tasks at the same time, it probably should not be on the same cable as the optical drive. HDD passwords and security ATA devices may support an optional security feature which is defined in an ATA specification, and thus not specific to any brand or device. The security feature can be enabled and disabled by sending special ATA commands to the drive. If a device is locked, it will refuse all access until it is unlocked. A device can have two passwords: A User Password and a Master Password; either or both may be set. There is a Master Password identifier feature which, if supported and used, can identify the current Master Password (without disclosing it). A device can be locked in two modes: High security mode or Maximum security mode. Bit 8 in word 128 of the IDENTIFY response shows which mode the disk is in: 0 = High, 1 = Maximum. In High security mode, the device can be unlocked with either the User or Master password, using the "SECURITY UNLOCK DEVICE" ATA command. There is an attempt limit, normally set to 5, after which the disk must be power cycled or hard-reset before unlocking can be attempted again. Also in High security mode, the SECURITY ERASE UNIT command can be used with either the User or Master password. In Maximum security mode, the device can be unlocked only with the User password. If the User password is not available, the only remaining way to get at least the bare hardware back to a usable state is to issue the SECURITY ERASE PREPARE command, immediately followed by SECURITY ERASE UNIT. In Maximum security mode, the SECURITY ERASE UNIT command requires the Master password and will completely erase all data on the disk. Word 89 in the IDENTIFY response indicates how long the operation will take. While the ATA lock is intended to be impossible to defeat without a valid password, there are purported workarounds to unlock a device. External parallel ATA devices Due to a short cable length specification and shielding issues it is extremely uncommon to find external PATA devices that directly use PATA for connection to a computer. A device connected externally needs additional cable length to form a U-shaped bend so that the external device may be placed alongside, or on top of the computer case, and the standard cable length is too short to permit this. For ease of reach from motherboard to device, the connectors tend to be positioned towards the front edge of motherboards, for connection to devices protruding from the front of the computer case. This front-edge position makes extension out the back to an external device even more difficult. Ribbon cables are poorly shielded, and the standard relies upon the cabling to be installed inside a shielded computer case to meet RF emissions limits. External hard disk drives or optical disk drives that have an internal PATA interface, use some other interface technology to bridge the distance between the external device and the computer. USB is the most common external interface, followed by Firewire. A bridge chip inside the external devices converts from the USB interface to PATA, and typically only supports a single external device without cable select or master/slave. Compact Flash interface Compact Flash in its IDE mode is essentially a miniaturized ATA interface, intended for use on devices that use flash memory storage. No interfacing chips or circuitry are required, other than to directly adapt the smaller CF socket onto the larger ATA connector. (Although most CF cards only support IDE mode up to PIO4, making them much slower in IDE mode than their CF capable speed) The ATA connector specification does not include pins for supplying power to a CF device, so power is inserted into the connector from a separate source. The exception to this is when the CF device is connected to a 44-pin ATA bus designed for 2.5-inch hard disk drives, commonly found in notebook computers, as this bus implementation must provide power to a standard hard disk drive. CF devices can be designated as devices 0 or 1 on an ATA interface, though since most CF devices offer only a single socket, it is not necessary to offer this selection to end users. Although CF can be hot-pluggable with additional design methods, by default when wired directly to an ATA interface, it is not intended to be hot-pluggable. ATA standards versions, transfer rates, and features The following table shows the names of the versions of the ATA standards and the transfer modes and rates supported by each. Note that the transfer rate for each mode (for example, 66.7 MB/s for UDMA4, commonly called "Ultra-DMA 66", defined by ATA-5) gives its maximum theoretical transfer rate on the cable. This is simply two bytes multiplied by the effective clock rate, and presumes that every clock cycle is used to transfer end-user data. In practice, of course, protocol overhead reduces this value. Congestion on the host bus to which the ATA adapter is attached may also limit the maximum burst transfer rate. For example, the maximum data transfer rate for conventional PCI bus is 133 MB/s, and this is shared among all active devices on the bus. In addition, no ATA hard drives existed in 2005 that were capable of measured sustained transfer rates of above 80 MB/s. Furthermore, sustained transfer rate tests do not give realistic throughput expectations for most workloads: They use I/O loads specifically designed to encounter almost no delays from seek time or rotational latency. Hard drive performance under most workloads is limited first and second by those two factors; the transfer rate on the bus is a distant third in importance. Therefore, transfer speed limits above 66 MB/s really affect performance only when the hard drive can satisfy all I/O requests by reading from its internal cache—a very unusual situation, especially considering that such data is usually already buffered by the operating system. , mechanical hard disk drives can transfer data at up to 524 MB/s, which is far beyond the capabilities of the PATA/133 specification. High-performance solid state drives can transfer data at up to 7000–7500 MB/s. Only the Ultra DMA modes use CRC to detect errors in data transfer between the controller and drive. This is a 16-bit CRC, and it is used for data blocks only. Transmission of command and status blocks do not use the fast signaling methods that would necessitate CRC. For comparison, in Serial ATA, 32-bit CRC is used for both commands and data. Features introduced with each ATA revision Speed of defined transfer modes Related standards, features, and proposals ATAPI Removable Media Device (ARMD) ATAPI devices with removable media, other than CD and DVD drives, are classified as ARMD (ATAPI Removable Media Device) and can appear as either a super-floppy (non-partitioned media) or a hard drive (partitioned media) to the operating system. These can be supported as bootable devices by a BIOS complying with the ATAPI Removable Media Device BIOS Specification, originally developed by Compaq Computer Corporation and Phoenix Technologies. It specifies provisions in the BIOS of a personal computer to allow the computer to be bootstrapped from devices such as Zip drives, Jaz drives, SuperDisk (LS-120) drives, and similar devices. These devices have removable media like floppy disk drives, but capacities more commensurate with hard drives, and programming requirements unlike either. Due to limitations in the floppy controller interface most of these devices were ATAPI devices, connected to one of the host computer's ATA interfaces, similarly to a hard drive or CD-ROM device. However, existing BIOS standards did not support these devices. An ARMD-compliant BIOS allows these devices to be booted from and used under the operating system without requiring device-specific code in the OS. A BIOS implementing ARMD allows the user to include ARMD devices in the boot search order. Usually an ARMD device is configured earlier in the boot order than the hard drive. Similarly to a floppy drive, if bootable media is present in the ARMD drive, the BIOS will boot from it; if not, the BIOS will continue in the search order, usually with the hard drive last. There are two variants of ARMD, ARMD-FDD and ARMD-HDD. Originally ARMD caused the devices to appear as a sort of very large floppy drive, either the primary floppy drive device 00h or the secondary device 01h. Some operating systems required code changes to support floppy disks with capacities far larger than any standard floppy disk drive. Also, standard-floppy disk drive emulation proved to be unsuitable for certain high-capacity floppy disk drives such as Iomega Zip drives. Later the ARMD-HDD, ARMD-"Hard disk device", variant was developed to address these issues. Under ARMD-HDD, an ARMD device appears to the BIOS and the operating system as a hard drive. ATA over Ethernet In August 2004, Sam Hopkins and Brantley Coile of Coraid specified a lightweight ATA over Ethernet protocol to carry ATA commands over Ethernet instead of directly connecting them to a PATA host adapter. This permitted the established block protocol to be reused in storage area network (SAN) applications. See also Advanced Host Controller Interface (AHCI) ATA over Ethernet (AoE) BIOS for BIOS Boot Specification (BBS) CE-ATA Consumer Electronics (CE) ATA FATA (hard drive) INT 13H for BIOS Enhanced Disk Drive Specification (SFF-8039i) IT8212, a low-end Parallel ATA controller Master/slave (technology) SCSI (Small Computer System Interface) Serial ATA List of device bandwidths References External links CE-ATA Workgroup AT Attachment Computer storage buses Computer connectors Computer hardware standards

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https://en.wikipedia.org/wiki/Atari%202600

Atari 2600

The Atari 2600, branded as the Atari Video Computer System (Atari VCS) until November 1982, is a home video game console developed and produced by Atari, Inc. Released in September 1977, it popularized microprocessor-based hardware and games stored on swappable ROM cartridges, a format first used with the Fairchild Channel F in 1976. The VCS was bundled with two joystick controllers, a conjoined pair of paddle controllers, and a game cartridgeinitially Combat and later Pac-Man. Atari was successful at creating arcade video games, but their development cost and limited lifespan drove CEO Nolan Bushnell to seek a programmable home system. The first inexpensive microprocessors from MOS Technology in late 1975 made this feasible. The console was prototyped as codename Stella, by Atari subsidiary Cyan Engineering. Lacking funding to complete the project, Bushnell sold Atari to Warner Communications in 1976. The Atari VCS launched in 1977 with nine simple, low-resolution games in 2 KB cartridges. The system's first killer app was the home conversion of Taito's arcade game Space Invaders in 1980. The VCS became widely successful, leading to the founding of Activision and other third-party game developers and to competition from console manufacturers Mattel and Coleco. By the end of its primary lifecycle in 1983–84, games for the 2600 were using more than four times the storage size of the launch games with significantly more advanced visuals and gameplay than the system was designed for, such as Activision's Pitfall!. In 1982, the Atari 2600 was the dominant game system. Amid competition from both new consoles and game developers, a number of poor decisions from Atari management affected the company and the industry as a whole. The most public was an extreme investment into licensed games for the 2600, including Pac-Man and E.T. the Extra-Terrestrial. Pac-Man became the system's biggest selling game, but the conversion's poor quality eroded consumer confidence in the console. E.T. was rushed to market for the holiday shopping season and was critically panned and a commercial failure. Both games, and a glut of third-party shovelware, were factors in ending Atari's relevance in the console market. Atari's downfall reverberated through the industry resulting in the video game crash of 1983. Warner sold Atari's home division to former Commodore CEO Jack Tramiel in 1984. In 1986, the new Atari Corporation under Tramiel released a lower-cost version of the 2600 and the backward-compatible Atari 7800, but it was Nintendo that led the recovery of the industry with its 1985 launch of the Nintendo Entertainment System. Production of the Atari 2600 ended on January 1, 1992, with an estimated 30 million units sold across its lifetime. History Atari, Inc. was founded by Nolan Bushnell and Ted Dabney in 1972. The first major product is Pong, released in 1972, the first successful coin-operated video game. While Atari continued to develop new arcade games in following years, Pong gave rise to a number of competitors to the growing arcade game market. The competition along with other missteps by Atari led to financial problems in 1974, though recovering by the end of the year. By 1975, Atari had released a Pong home console, competing against Magnavox, the only other major producer of home consoles at the time. Atari engineers recognized, however, the limitation of custom logic integrated onto the circuit board, permanently confining the whole console to only one game. The increasing competition increased the risk, as Atari had found with past arcade games and again with dedicated home consoles. Both platforms are built from integrating discrete electro-mechanical components into circuits, rather than programmed as on a mainframe computer. Therefore, development of a console had cost at least plus time to complete, but the final product only had about a three-month shelf life until becoming outdated by competition. By 1974, Atari had acquired Cyan Engineering, a Grass Valley electronics company founded by Steve Mayer and Larry Emmons, both former colleagues of Bushnell and Dabney from Ampex, who helped to develop new ideas for Atari's arcade games. Even prior to the release of the home version of Pong, Cyan's engineers, led by Mayer and Ron Milner, had envisioned a home console powered by new programmable microprocessors capable of playing Atari's current arcade offerings. The programmable microprocessors would enable a console design significantly simpler and more powerful than any dedicated single-game unit. However, such chips cost , far outside the range that their market would support. Atari had opened negotiations to use Motorola's new 6800 in future systems. MOS Technology 6502/6507 In September 1975, MOS Technology debuted the 6502 microprocessor for at the Wescon trade show in San Francisco. Mayer and Milner attended and met with the leader of the team that created the chip, Chuck Peddle, and proposed using the 6502 in a game console, and offered to discuss it further at Cyan's facilities after the show. Over two days, MOS and Cyan engineers sketched out a 6502-based console design by Meyer and Milner's specifications. Financial models showed that even at , the 6502 would be too expensive, and Peddle offered them a planned 6507 microprocessor, a cost-reduced version of the 6502, and MOS's RIOT chip for input/output. Cyan and MOS negotiated the 6507 and RIOT chips at a pair. MOS also introduced Cyan to Microcomputer Associates, who had separately developed debugging software and hardware for MOS, and had developed the JOLT Computer for testing the 6502, which Peddle suggested would be useful for Atari and Cyan to use while developing their system. Milner was able to demonstrate a proof-of-concept for a programmable console by implementing Tank, an arcade game by Atari's subsidiary Kee Games, on the JOLT. As part of the deal, Atari wanted a second source of the chipset. Peddle and Paivinen suggested Synertek whose co-founder, Bob Schreiner, was a friend of Peddle. In October 1975, Atari informed the market that it was moving forward with MOS. The Motorola sales team had already told its management that the Atari deal was finalized, and Motorola management was livid. They announced a lawsuit against MOS the next week. Building the system By December 1975, Atari hired Joe Decuir, a recent graduate from University of California, Berkeley who had been doing his own testing on the 6502. Decuir began debugging the first prototype designed by Mayer and Milner, which gained the codename "Stella" after the brand of Decuir's bicycle. This prototype included a breadboard-level design of the graphics interface to build upon. A second prototype was completed by March 1976 with the help of Jay Miner, who created a chip called the Television Interface Adaptor (TIA) to send graphics and audio to a television. The second prototype included a TIA, a 6507, and a ROM cartridge slot and adapter. As the TIA's design was refined, Al Alcorn brought in Atari's game developers to provide input on features. There are significant limitations in the 6507, the TIA, and other components, so the programmers creatively optimized their games to maximize the console. The console lacks a framebuffer and requires games to instruct the system to generate graphics in synchronization with the electron gun in the cathode-ray tube (CRT) as it scans across rows on the screen. The programmers found ways to "race the beam" to perform other functions while the electron gun scans outside of the visible screen. Alongside the electronics development, Bushnell brought in Gene Landrum, a consultant who had just prior consulted for Fairchild Camera and Instrument for its upcoming Channel F, to determine the consumer requirements for the console. In his final report, Landrum suggested a living room aesthetic, with a wood grain finish, and the cartridges must be "idiot proof, child proof and effective in resisting potential static [electricity] problems in a living room environment". Landrum recommended it include four to five dedicated games in addition to the cartridges, but this was dropped in the final designs. The cartridge design was done by James Asher and Douglas Hardy. Hardy had been an engineer for Fairchild and helped in the initial design of the Channel F cartridges, but he quit to join Atari in 1976. The interior of the cartridge that Asher and Hardy designed was sufficiently different to avoid patent conflicts, but the exterior components were directly influenced by the Channel F to help work around the static electricity concerns. Atari was still recovering from its 1974 financial woes and needed additional capital to fully enter the home console market, though Bushnell was wary of being beholden to outside financial sources. Atari obtained smaller investments through 1975, but not at the scale it needed, and began considering a sale to a larger firm by early 1976. Atari was introduced to Warner Communications, which saw the potential for the growing video game industry to help offset declining profits from its film and music divisions. Negotiations took place during 1976, during which Atari cleared itself of liabilities, including settling a patent infringement lawsuit with Magnavox over Ralph H. Baer's patents that were the basis for the Magnavox Odyssey. In mid-1976, Fairchild announced the Channel F, planned for release later that year, beating Atari to the market. By October 1976, Warner and Atari agreed to the purchase of Atari for . Warner provided an estimated which allowed Stella to be fast-tracked. By 1977, development had advanced enough to brand it the "Atari Video Computer System" (VCS) and start developing games. Launch and success The unit was showcased on June 4, 1977, at the Summer Consumer Electronics Show with plans for retail release in October. The announcement was purportedly delayed to wait out the terms of the Magnavox patent lawsuit settlement, which would have given Magnavox all technical information on any of Atari's products announced between June 1, 1976, and June 1, 1977. However, Atari encountered production problems during its first batch, and its testing was complicated by the use of cartridges. The Atari VCS was launched in September 1977 at , with two joysticks and a Combat cartridge; eight additional games were sold separately. Most of the launch games were based on arcade games developed by Atari or its subsidiary Kee Games; for example, Combat was based on Kee's Tank (1974) and Atari's Jet Fighter (1975). Atari sold between 350,000 and 400,000 Atari VCS units during 1977, attributed to the delay in shipping the units and consumers' unfamiliarity with a swappable-cartridge console that is not dedicated to only one game. In 1978, Atari sold only 550,000 of the 800,000 systems manufactured. This required further financial support from Warner to cover losses. Atari sold 1 million consoles in 1979, particularly during the holiday season, but there was new competition from the Mattel Electronics Intellivision and Magnavox Odyssey², which also use swappable ROM cartridges. Atari obtained a license from Taito to develop a VCS conversion of its 1978 arcade hit Space Invaders. This is the first officially licensed arcade conversion for a home console. Its release in March 1980 doubled the console's sales for the year to more than 2 million units, and was considered the Atari 2600's killer application. Sales then doubled again for the next two years; by 1982, 10 million consoles had been sold in the United States, while its best-selling game was Pac-Man at over copies sold by 1990. Pac-Man propelled worldwide Atari VCS sales to units during 1982, eventually selling consoles worldwide by the end of the year. In Europe, the Atari VCS sold 125,000 units in the United Kingdom during 1980, and 450,000 in West Germany by 1984. In France, where the VCS released in 1982, the system sold 600,000 units by 1989. In 1982, Atari launched its second programmable console, the Atari 5200. To standardize naming, the VCS was renamed to the "Atari 2600 Video Computer System", or "Atari 2600", derived from the manufacture part number CX2600. By 1982, the 2600 cost Atari about $40 to make and was sold for an average of . The company spent $4.50 to $6 to manufacture each cartridge, plus $1 to $2 for advertising, wholesaling for . Third-party development Activision, formed by Crane, Whitehead, and Miller in 1979, started developing third-party VCS games using their knowledge of VCS design and programming tricks, and began releasing games in 1980. Kaboom! (1981) and Pitfall! (1982) are among the most successful with at least one and four million copies sold, respectively. In 1980, Atari attempted to block the sale of the Activision cartridges, accusing the four of intellectual property infringement. The two companies settled out of court, with Activision agreeing to pay Atari a licensing fee for their games. This made Activision the first third-party video game developer and established the licensing model that continues to be used by console manufacturers for game development. Activision's success led to the establishment of other third-party VCS game developers following Activision's model in the early 1980s, including U.S. Games, Telesys, Games by Apollo, Data Age, Zimag, Mystique, and CommaVid. The founding of Imagic included ex-Atari programmers. Mattel and Coleco, each already producing its own more advanced console, created simplified versions of their existing games for the 2600. Mattel used the M Network brand name for its cartridges. Third-party games accounted for half of VCS game sales by 1982. Decline and redesign In addition to third-party game development, Atari also received the first major threat to its hardware dominance from the Colecovision. Coleco had a license from Nintendo to develop a version of the smash hit arcade game Donkey Kong (1981), which was bundled with every Colecovision console. Coleco gained about 17% of the hardware market in 1982 compared to Atari's 58%. With third parties competing for market share, Atari worked to maintain dominance in the market by acquiring licenses for popular arcade games and other properties to make games from. Pac-Man has numerous technical and aesthetic flaws, but nevertheless more than 7 million copies were sold. Heading into the 1982 holiday shopping season, Atari had placed high sales expectations on E.T. the Extra-Terrestrial, a game programmed in about six weeks. Atari produced an estimated four million cartridges, but the game was poorly reviewed, and only about 1.5 million units were sold. Warner Communications reported weaker results than expected in December 1982 to its shareholders, having expected a 50% year-to-year growth but only obtaining 10–15% due to declining sales at Atari. Coupled with the oversaturated home game market, Atari's weakened position led investors to start pulling funds out of video games, beginning a cascade of disastrous effects known as the video game crash of 1983. Many of the third-party developers formed prior to 1983 were closed, and Mattel and Coleco left the video game market by 1985. In September 1983, Atari sent 14 truckloads of unsold Atari 2600 cartridges and other equipment to a landfill in the New Mexico desert, later labeled the Atari video game burial. Long considered an urban legend that claimed the burial contained millions of unsold cartridges, the site was excavated in 2014, confirming reports from former Atari executives that only about 700,000 cartridges had actually been buried. Atari reported a loss for 1983 as a whole, and continued to lose money into 1984, with a loss reported in the second quarter. By mid-1984, software development for the 2600 had essentially stopped except that of Atari and Activision. Warner, wary of supporting its failing Atari division, started looking for buyers in 1984. Warner sold most of Atari to Jack Tramiel, the founder of Commodore International, in July 1984 for about , though Warner retained Atari's arcade business. Tramiel was a proponent of personal computers, and de-prioritized further 2600 development following the sale. The North American video game market did not recover until about 1986, after Nintendo's 1985 launch of the Nintendo Entertainment System in North America. Atari Corporation released a redesigned model of the 2600 in 1986, supported by an ad campaign touting a price of "under 50 bucks". With a large library of cartridges and a low price point, the 2600 continued to sell into the late 1980s. Atari released the last batch of games in 1989–90 including Secret Quest and Fatal Run. By 1986, over Atari VCS units had been sold worldwide. The final Atari-licensed release is the PAL-only version of the arcade game KLAX in 1990. After more than 14 years on the market, the 2600 line was formally discontinued on January 1, 1992, along with the Atari 7800 and Atari 8-bit family of home computers. Hardware Console The Atari 2600's CPU is the MOS Technology 6507, a version of the 6502, running at 1.19 MHz in the 2600. Though their internal silicon was identical, the 6507 was cheaper than the 6502 because its package included fewer memory-address pins—13 instead of 16. The designers of the Atari 2600 selected an inexpensive cartridge interface that has one fewer address than the 13 allowed by the 6507, further reducing the already limited addressable memory to 4 KB (212 = 4096). This was believed to be sufficient as Combat is itself only 2 KB. Later games circumvented this limitation with bank switching. The console has 128 bytes of RAM for scratch space, the call stack, and the state of the game environment. The top bezel of the console originally had six switches: power, TV type selection (color or black-and-white), game selection, player difficulty, and game reset. The difficulty switches were moved to the back of the bezel in later versions of the console. The back bezel also included the controller ports, TV output, and power input. Graphics The Atari 2600 was designed to be compatible with the cathode-ray tube television sets produced in the late 1970s and early 1980s, which commonly lack auxiliary video inputs to receive audio and video from another device. Therefore, to connect to a TV, the console generates a radio frequency signal compatible with the regional television standards (NTSC, PAL, or SECAM), using a special switch box to act as the television's antenna. Atari developed the Television Interface Adaptor (TIA) chip in the VCS to handle the graphics and conversion to a television signal. It provides a single-color, 20-bit background register that covers the left half of the screen (each bit represents 4 adjacent pixels) and is either repeated or reflected on the right side. There are 5 single-color sprites: two 8-pixel wide players; two 1 bit missiles, which share the same colors as the players; and a 1-pixel ball, which shares the background color. The 1-bit sprites all can be controlled to stretch to 1, 2, 4, or 8 pixels. The system was designed without a frame buffer to avoid the cost of the associated RAM. The background and sprites apply to a single scan line, and as the display is output to the television, the program can change colors, sprite positions, and background settings. The careful timing required to sync the code to the screen on the part of the programmer was labeled "racing the beam"; the actual game logic runs when the television beam is outside of the visible area of the screen. Early games for the system use the same visuals for pairs of scan lines, giving a lower vertical resolution, to allow more time for the next row of graphics to be prepared. Later games, such as Pitfall!, change the visuals for each scan line or extend the black areas around the screen to extend the game code's processing time. Regional releases of the Atari 2600 use modified TIA chips for each region's television formats, which require games to be developed and published separately for each region. All modes are 160 pixels wide. NSTC mode provides 192 visible lines per screen, drawn at 60 Hz, with 16 colors, each at 8 levels of brightness. PAL mode provides more vertical scanlines, with 228 visible lines per screen, but drawn at 50 Hz and only 13 colors. SECAM mode, also a 50 Hz format, is limited to 8 colors, each with only a single brightness level. Controllers The first VCS bundle has two types of controllers: a joystick (part number CX10) and pair of rotary paddle controllers (CX30). Driving controllers, which are similar to paddle controllers but can be continuously rotated, shipped with the Indy 500 launch game. After less than a year, the CX10 joystick was replaced with the CX40 model designed by James C. Asher. Because the Atari joystick port and CX40 joystick became industry standards, 2600 joysticks and some other peripherals work with later systems, including the MSX, Commodore 64, Amiga, Atari 8-bit family, and Atari ST. The CX40 joystick can be used with the Master System and Sega Genesis, but does not provide all the buttons of a native controller. Third-party controllers include Wico's Command Control joystick. Later, the CX42 Remote Control Joysticks, similar in appearance but using wireless technology, were released, together with a receiver whose wires could be inserted in the controller jacks. Atari introduced the CX50 Keyboard Controller in June 1978 along with two games that require it: Codebreaker and Hunt & Score. The similar, but simpler, CX23 Kid's Controller was released later for a series of games aimed at a younger audience. The CX22 Trak-Ball controller was announced in January 1983 and is compatible with the Atari 8-bit family. There were two attempts to turn the Atari 2600 into a keyboard-equipped home computer: Atari's never-released CX3000 "Graduate" keyboard, and the CompuMate keyboard by Spectravideo which was released in 1983. Console models Minor revisions The initial production of the VCS was made in Sunnyvale during 1977, using thick polystyrene plastic for the casing as to give the impression of weight from what was mostly an empty shell inside. The initial Sunnyvale batch had also included potential mounts for an internal speaker system on the casing, though the speakers were found to be too expensive to include and instead sound was routed through the TIA to the connected television. All six console switches on the front panel. Production of the unit was moved to Taiwan in 1978, where a less thick internal metal shielding was used and thinner plastic was used for the casing, reducing the system's weight. These two versions are commonly referred to as "Heavy Sixers" and "Light Sixers" respectively, referencing the six front switches. In 1980, the difficulty switches were moved to the back of the console, leaving four switches on the front. Otherwise, these four-switch consoles look nearly identical to the earlier six-switch models. In 1982 Atari rebranded the console as the "Atari 2600", a name first used on a version of the four-switch model without woodgrain, giving it an all-black appearance. Sears Video Arcade Atari continued its OEM relationship with Sears under the latter's Tele-Games brand, which started in 1975 with the original Pong. This is unrelated to the company Telegames, which later produced 2600 cartridges. Sears released several models of the VCS as the Sears Video Arcade series starting in 1977. In 1983, the previously Japan-only Atari 2800 was rebranded as the Sears Video Arcade II. Sears released versions of Atari's games with Tele-Games branding, usually with different titles. Three games were produced by Atari for Sears as exclusive releases: Steeplechase, Stellar Track, and Submarine Commander. Atari 2800 The Atari 2800 is the Japanese version of the 2600 released in October 1983. It is the first Japan-specific release of a 2600, though companies like Epoch had distributed the 2600 in Japan previously. The 2800 was released a short time after Nintendo's Family Computer (which became the dominant console in Japan), and it did not gain a significant share of the market. Sears released the 2800 in the US in 1983 as the Sears Video Arcade II packaged with two controllers and Space Invaders. Around 30 specially branded games were released for the 2800. Designed by engineer Joe Tilly, the 2800 has four controller ports instead of the two of the 2600. The controllers are an all-in one design using a combination of an 8-direction digital joystick and a 270-degree paddle, designed by John Amber. The 2800's case design departed from the 2600, using a wedge shape with non-protruding switches. The case style is the basis for the Atari 7800, designed by Barney Huang. Atari 2600 Jr. The 1986 model has a smaller, cost-reduced form factor with an Atari 7800-like appearance. It was advertised as a budget gaming system (under ) with the ability to run a large collection of games. Released after the video game crash of 1983, and after the North American launch of the Nintendo Entertainment System, the 2600 was supported with new games and television commercials promoting "The fun is back!". Atari released several minor stylistic variations: the "large rainbow" (shown), "short rainbow", and an all-black version sold only in Ireland. Later European versions include a joypad. Games In 1977, nine games were released on cartridge to accompany the launch of the console: Air-Sea Battle, Basic Math, Blackjack, Combat, Indy 500, Star Ship, Street Racer, Surround, and Video Olympics. Indy 500 shipped with special "driving controllers", which are like paddles but rotate freely. Street Racer and Video Olympics use the standard paddle controllers. Atari determined that box art featuring only descriptions of the game and screenshots would not be sufficient to sell games in retail stores, since most games were based on abstract principles and screenshots give little information. Atari outsourced box art to Cliff Spohn, who created visually interesting artwork with implications of dynamic movement intended to engage the player's imagination while staying true to the gameplay. Spohn's style became a standard for Atari when bringing in assistant artists, including Susan Jaekel, Rick Guidice, John Enright, and Steve Hendricks. Spohn and Hendricks were the largest contributors to the covers in the Atari 2600 library. Ralph McQuarrie, a concept artist on the Star Wars series, was commissioned for one cover, the arcade conversion of Vanguard. These artists generally conferred with the programmer to learn about the game before drawing the art. An Atari VCS port of the Breakout arcade game appeared in 1978. The original is in black and white with a colored overlay, and the home version is in color. In 1980, Atari released Adventure, the first action-adventure game, and the first home game with a hidden Easter egg. Rick Maurer's port of Taito's Space Invaders, released in 1980, is the first VCS game to have more than one million copies sold—eventually doubling that within a year and totaling more than cartridges by 1983. It became the killer app to drive console sales. Versions of Atari's own Asteroids and Missile Command arcade games, released in 1981, were also major hits. Each early VCS game is in a 2K ROM. Later games like Space Invaders, have 4K. The VCS port of Asteroids (1981) is the first game for the system to use 8K via a bank switching technique between two 4K segments. Some later releases, including Atari's ports of Dig Dug and Crystal Castles, are 16K cartridges. One of the final games, Fatal Run (1990), doubled this to 32K. Atari, Inc. was the only developer for the first few years, releasing dozens of games. Two Atari-published games, both from the system's peak in 1982, E.T. the Extra-Terrestrial and Pac-Man, are cited as factors in the video game crash of 1983. A company named Mystique produced a number of pornographic games for the 2600. The most notorious, Custer's Revenge, was protested by women's and Native American groups because it depicted General George Armstrong Custer raping a bound Native American woman. Atari sued Mystique in court over the release of the game. Legacy The 2600 was so successful in the late 1970s and early 1980s that "Atari" was a synonym for the console in mainstream media and for video games in general. Jay Miner directed the creation of the successors to the 2600's TIA chip—CTIA and ANTIC—which are central to the Atari 8-bit computers released in 1979 and later the Atari 5200 console. The Atari 2600 was inducted into the National Toy Hall of Fame at The Strong in Rochester, New York, in 2007. In 2009, the Atari 2600 was named the number two console of all time by IGN, which cited its remarkable role behind both the first video game boom and the video game crash of 1983, and called it "the console that our entire industry is built upon". In November 2021, the current incarnation of Atari announced three 2600 games to be published under "Atari XP" label: Yars' Return, Aquaventure, and Saboteur. These were previously included in Atari Flashback consoles. Clones and reissues Modern Atari 2600 clones remain on the market. The Atari Classics 10-in-1 TV Game, manufactured by Jakks Pacific, emulates the 2600 with ten games inside a Atari-style joystick with composite-video output. The TV Boy includes 127 games in an enlarged joypad. The Atari Flashback 2 console, released in 2005, contains 40 games, with four additional programs unlocked by a cheat code. The console implements the original 2600 architecture and can be modified to play original 2600 cartridges by adding a cartridge port; it is also compatible with original 2600 controllers. In 2017, Hyperkin announced the RetroN 77, a clone of the Atari 2600 that plays original cartridges instead of preinstalled games. The Atari VCS microconsole was released by Atari Interactive in 2021. Unreleased prototypes The Atari 2700 is a version of the 2600 using wireless controllers. An Atari 2600 variant, known by its production code "CX2000" and nickname "Val", was found as two 1982 prototypes at the New York and Sunnyvale Atari facilities, respectively. It is a redesign of the aging 2600. Its design, with two integrated joystick controllers, is the result of human factor analysis by Henry Dreyfuss Associates. The project never reached market production. Atari started work on a 2600 successor called the "Atari 3200". It was to be compatible with 2600 cartridges, and was rumored to be based on a 10-bit processor, although design documents show it was to be based on the 8-bit 6502. It was still unfinished when preliminary game developers discovered that it was difficult to program. Atari cloned the Atari 3200 into the Sears Super Arcade II, but this was never released. Notes References Citations General bibliography External links A history of the Atari VCS/2600 Inside the Atari 2600 Hardware and prototypes at the Atari Museum 1970s toys 1980s toys 2600 Computer-related introductions in 1977 Home video game consoles Products and services discontinued in 1992 Second-generation video game consoles

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https://en.wikipedia.org/wiki/Atari%205200

Atari 5200

The Atari 5200 SuperSystem or simply Atari 5200 is a home video game console introduced in 1982 by Atari, Inc. as a higher-end complement for the popular Atari Video Computer System. The VCS was renamed to the Atari 2600 at the time of the 5200's launch. Created to compete with Intellivision, the 5200 wound up a direct competitor of ColecoVision shortly after its release. While the Coleco system shipped with the first home version of Nintendo's Donkey Kong, the 5200 included the 1978 arcade game Super Breakout which had already appeared on the Atari 8-bit family and Atari VCS in 1979 and 1981 respectively. The CPU and the graphics and sound hardware are almost identical to that of the Atari 8-bit computers, although software is not directly compatible between the two systems. The 5200's controllers have an analog joystick and a numeric keypad along with start, pause, and reset buttons. The 360-degree non-centering joystick was touted as offering more control than the eight-way Atari CX40 joystick of the 2600, but was a focal point for criticism. On May 21, 1984, during a press conference at which the Atari 7800 was introduced, company executives revealed that the 5200 had been discontinued after just two years on the market. Total sales of the 5200 were reportedly in excess of 1 million units, far short of its predecessor's sales of over 30 million. Hardware Much of the technology in the Atari 8-bit family of home computer systems was originally developed as a second-generation games console intended to replace the 2600. However, as the system was reaching completion, the personal computer revolution was starting with the release of machines like the Commodore PET, TRS-80 and Apple II. These machines had less advanced hardware than the new Atari technology, but sold for much higher prices with associated higher profit margins. Atari's management decided to enter this market, and the technology was repackaged into the Atari 400 and 800. The chipset used in these machines was created with the mindset that the 2600 would likely be obsolete by the 1980 time frame. Atari later decided to re-enter the games market with a design that closely matched their original 1978 specifications. In its prototype stage, the Atari 5200 was originally called the "Atari Video System X – Advanced Video Computer System", and was codenamed "Pam" after a female employee at Atari, Inc. It is also rumored that PAM actually stood for "Personal Arcade Machine", as the majority of games for the system ended up being arcade conversions. Actual working Atari Video System X machines, whose hardware is 100% identical to the Atari 5200 do exist, but are extremely rare. The initial 1982 release of the system featured four controller ports, where nearly all other systems of the day had only one or two ports. The 5200 also featured a new style of controller with an analog joystick, numeric keypad, two fire buttons on each side of the controller and game function keys for Start, Pause, and Reset. The 5200 also featured the innovation of the first automatic TV switchbox, allowing it to automatically switch from regular TV viewing to the game system signal when the system was activated. Previous RF adapters required the user to slide a switch on the adapter by hand. The RF box was also where the power supply connected in a unique dual power/television signal setup similar to the RCA Studio II's. A single cable coming out of the 5200 plugged into the switch box and carried both electricity and the television signal. The 1983 revision of the Atari 5200 has two controller ports instead of four, and a change back to the more conventional separate power supply and standard non-autoswitching RF switch. It also has changes in the cartridge port address lines to allow for the Atari 2600 adapter released that year. While the adapter was only made to work on the two-port version, modifications can be made to the four-port to make it line-compatible. In fact, towards the end of the four-port model's production run, there were a limited number of consoles produced which included these modifications. These consoles can be identified by an asterisk in their serial numbers. At one point following the 5200's release, Atari planned a smaller, cost-reduced version of the Atari 5200, which removed the controller storage bin. Code-named the "Atari 5100" (a.k.a. "Atari 5200 Jr."), only a few fully working prototype 5100s were made before the project was canceled. Controllers The controller prototypes used in the electrical development lab employed a yoke-and-gimbal mechanism that came from an RC airplane controller kit. The design of the analog joystick, which used a weak rubber boot rather than springs to provide centering, proved to be ungainly and unreliable. They quickly became the Achilles' heel of the system due to the combination of an overly complex mechanical design and a very low-cost internal flex circuit system. Another major flaw of the controllers was that the design did not translate into a linear acceleration from the center through the arc of the stick travel. The controllers did, however, include a pause button, a unique feature at the time. Various third-party replacement joysticks were also released, including those made by Wico. Atari Inc. released the Pro-Line Trak-Ball controller for the system, which was used primarily for gaming titles such as Centipede and Missile Command. A paddle controller and an updated self-centering version of the original controller were also in development, but never made it to market. Games were shipped with plastic card overlays that snapped in over the keypad. The card would indicate which game functions, such as changing the view or vehicle speed, were assigned to each key. The primary controller was ranked the 10th worst video game controller by IGN editor Craig Harris. An editor for Next Generation said that their non-centering joysticks "rendered many games nearly unplayable". Internal differences from 8-bit computers David H. Ahl in 1983 described the Atari 5200 as "a 400 computer in disguise". Its internal design is a tweaked version of the Atari 8-bit family using the ANTIC, POKEY, and GTIA coprocessors. Software designed for one does not run on the other, but source code can be mechanically converted unless it uses computer-specific features. Antic magazine reported in 1984 that "the similarities grossly outweigh the differences, so that a 5200 program can be developed and almost entirely debugged [on an Atari 8-bit computer] before testing on a 5200". John J. Anderson of Creative Computing alluded to the incompatibility being intentional, caused by Atari's console division removing 8-bit compatibility to not lose control to the rival computer division. Besides the 5200's lack of a keyboard, the differences are: The Atari computer 10 KB operating system is replaced with a simpler 2 KB version, of which 1 KB is the built-in character set. Some hardware registers, such as those of the GTIA and POKEY chips, are at different memory locations. The purpose of some registers is slightly different on the 5200. The 5200's analog joysticks appear as pairs of paddles to the hardware, which requires different input handling from the digital joystick input on the Atari computers In 1987, Atari Corporation released the XE Game System console, which is a repackaged 65XE (from 1985) with a detachable keyboard that can run home computer titles directly, unlike the 5200. Anderson wrote in 1984 that Atari could have released a console compatible with computer software in 1981. Reception The Atari 5200 did not fare well commercially compared to its predecessor, the Atari 2600. While it touted superior graphics to the 2600 and Mattel's Intellivision, the system was initially incompatible with the 2600's expansive library of games, and some market analysts have speculated that this hurt its sales, especially since an Atari 2600 cartridge adapter had been released for the Intellivision II. (A revised two-port model was released in 1983, along with a game adapter that allowed gamers to play all 2600 games.) This lack of new games was due in part to a lack of funding, with Atari continuing to develop most of its games for the saturated 2600 market. Many of the 5200's games appeared simply as updated versions of 2600 titles, which failed to excite consumers. Its pack-in game, Super Breakout, was criticized for not doing enough to demonstrate the system's capabilities. This gave the ColecoVision a significant advantage as its pack-in, Donkey Kong, delivered a more authentic arcade experience than any previous game cartridge. In its list of the top 25 game consoles of all time, IGN claimed that the main reason for the 5200's market failure was the technological superiority of its competitor, while other sources maintain that the two consoles are roughly equivalent in power. The 5200 received much criticism for the "sloppy" design of its non-centering analog controllers. Anderson described the controllers as "absolutely atrocious". David H. Ahl of Creative Computing Video & Arcade Games said in 1983 that the "Atari 5200 is, dare I say it, Atari's answer to Intellivision, Colecovision, and the Astrocade", describing the console as a "true mass market" version of the Atari 8-bit computers despite the software incompatibility. He criticized the joystick's imprecise control but said that "it is at least as good as many other controllers", and wondered why Super Breakout was the pack-in game when it did not use the 5200's improved graphics. Technical specifications CPU: Custom MOS Technology 6502C @ 1.79 MHz (not a 65C02) Graphics chips: ANTIC and GTIA Support hardware: 3 custom VLSI chips Screen resolution: 14 modes: Six text modes (8×8, 4×8, and 8×10 character matrices supported), Eight graphics modes including 80 pixels per line (16 color), 160 pixels per line (4 color), 320 pixels per line (2 color), variable height and width up to overscan 384×240 pixels Color palette: 128 (16 hues, 8 luma) or 256 (16 hues, 16 luma) Colors on screen: 2 (320 pixels per line) to 16 (80 pixels per line). up to 23 colors per line with player/missile and playfield priority control mixing. Register values can be changed at every scanline using ANTIC display list interrupts, allowing up to 256 (16 hues, 16 luma) to be displayed at once, with up to 16 per scanline. Sprites: 4 8-pixel wide sprites, 4 2-pixel wide sprites; height of each is either 128 or 256 pixels; 1 color per sprite Scrolling: Coarse and fine scrolling horizontally and vertically. (Horizontal coarse scroll 4, 8, or 16-pixel/color clock increments, and vertically by mode line height 2, 4, 8, or 16 scan lines.) (Or horizontal fine scroll 0 to 3, 7, or 15 single-pixel/color clock increments and then a 4, 8, or 16-pixel/color clock increment coarse scroll; and vertical fine scroll 0 to 1, 3, 7, or 15 scan line increments and then a 2, 4, 8, or 16 scan line increment coarse scroll), Sound: 4-channel PSG sound via POKEY sound chip, which also handles keyboard scanning, serial I/O, high resolution interrupt capable timers (single cycle accurate), and random number generation. RAM: 16 KB ROM: 2 KB on-board BIOS for system startup and interrupt routing. 32 KB ROM window for standard game cartridges, expandable using bank switching techniques. Dimensions: 13" × 15" × 4.25" Games See also List of Atari 5200 emulators Video game crash of 1983 References External links AtariAge – Comprehensive Atari 5200 database and information Atari Museum 5200 Super System section 5200 Home video game consoles Second-generation video game consoles Products introduced in 1982

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Atari 7800

The Atari 7800 ProSystem, or simply the Atari 7800, is a home video game console officially released by Atari Corporation in 1986 as the successor to both the Atari 2600 and Atari 5200. It can run almost all Atari 2600 cartridges, making it one of the first consoles with backward compatibility. It shipped with a different model of joystick from the 2600-standard CX40 and Pole Position II as the pack-in game. Most of the announced titles at launch were ports of 1980–83 arcade games. Designed by General Computer Corporation, the 7800 has significantly improved graphics hardware over Atari's previous consoles, but the same Television Interface Adaptor chip that launched with the 2600 in 1977 is used to generate audio. In an effort to prevent the flood of poor quality games that contributed to the video game crash of 1983, cartridges had to be digitally signed by Atari. The Atari 7800 was first announced by Atari, Inc. on May 21, 1984, but a general release was shelved due to the sale of the company. Atari Corporation dropped support for the 7800, along with the 2600 and the Atari 8-bit family, on January 1, 1992. History Atari had been facing pressure from Coleco and its ColecoVision console, which supported graphics that more closely mirrored arcade games of the time than either the Atari 2600 or 5200. The Atari 5200 (released as a successor to the Atari 2600) was criticized for not being able to play 2600 games without an adapter. The Atari 7800 ProSystem was the first console from Atari, Inc. designed by an outside company, General Computer Corporation, (GCC) as a result of a lawsuit settlement between Atari and GCC. It was designed in 1983–84 with an intended mass market rollout in June 1984, but was canceled after the sale of the company to Tramel Technology Ltd on July 2, 1984. The project was originally called the Atari 3600. With a background in creating arcade games such as Food Fight, GCC designed the new system with a graphics architecture similar to arcade machines of the time. The CPU is a slightly customized 6502 processor, the Atari SALLY (sometimes described as a "6502C"), running at 1.79 MHz. By some measures the 7800 is more powerful, and by others less, than Nintendo's 1983 NES. It uses the 2600's Television Interface Adaptor chip, with the same restrictions, for generating two-channels of audio. Launch The 7800 was announced on May 21, 1984. Thirteen games were announced for the system's launch: Ms. Pac-Man, Pole Position II, Centipede, Joust, Dig Dug, Nile Flyer (eventually released as Desert Falcon), Robotron: 2084, Galaga, Food Fight, Ballblazer, Rescue on Fractalus!, Track & Field, and Xevious. On July 2, 1984, Warner Communications sold Atari's Consumer Division to Jack Tramiel. All projects were halted during an initial evaluation period. GCC had not been paid for their development of the 7800, and Warner and Tramiel fought over who was accountable. In May 1985, Tramiel relented and paid GCC. This led to additional negotiations regarding the launch titles GCC had developed, then an effort to find someone to lead their new video game division, which was completed in November 1985. The original production run of the Atari 7800 languished in warehouses until it was introduced in January 1986. The console was released nationwide in May 1986 for $79.95. It launched with titles intended for the 7800's debut in 1984 and was aided by a marketing campaign with a budget in the "low millions" according to Atari Corporation officials. This was substantially less than the $9 million spent by Sega and the $16 million spent by Nintendo. The keyboard and high score cartridge planned by Warner were cancelled. In February 1987, Computer Entertainer reported that 100,000 Atari 7800 consoles had been sold in the United States, including those which had been warehoused since 1984. This was less than the Master System's 125,000 and the NES's 1.1 million. A complaint from owners in 1986 was the slow release of games. Galaga in August was followed by Xevious in November. By the end of 1986, the 7800 had 10 games, compared to Sega's 20 and Nintendo's 36. Atari would sell over 1 million 7800 consoles by June 1988. Discontinuation On January 1, 1992, Atari Corporation announced the end of production and support for the 7800, 2600, and the 8-bit computer family including the Atari XEGS. At least one game, an unreleased port of Toki, was worked on past this date. By the time of the discontinuation, the Nintendo Entertainment System controlled 80% of the North American market while Atari had 12%. Retro Gamer magazine issue 132 reported that according to Atari UK Marketing Manager Darryl Still, "it was very well stocked by European retail; although it never got the consumer traction that the 2600 did, I remember we used to sell a lot of units through mail order catalogues and in the less affluent areas". Technical specifications CPU: Atari SALLY (custom variant of the 6502) 1.79 MHz, which drops to 1.19 MHz when the TIA Television Interface Adaptor or RIOT (6532 RAM-I/O-Timer) chips are accessed Unlike a standard 6502, SALLY can be halted in a known state with a single pin to let other devices control the bus. Sometimes referred to by Atari as "6502C", but not the same as the official MOS Technology 6502C. RAM: 4 KB (2 6116 2Kx8 RAM ICs) ROM: built in 4 KB BIOS ROM, 48 KB Cartridge ROM space without bank switching Graphics: MARIA custom chip Resolution: 160×240 (160×288 PAL) or 320×240 (320×288 PAL) Color palette: 256 (16 hues * 16 luma), different graphics modes restricted the number of usable colors and the number of colors per sprite Direct Memory Access (DMA) Graphics clock: 7.15 MHz Line buffer: 200 bytes (double buffering), 160 sprite pixels per scanline, up to 30 sprites per scanline (without background), up to 100 sprites on screen Sprite/zone sizes: 4 to 160 width, height of 4, 8 or 16 pixels Colors per sprite: 1 to 12 (1 to 8 visible colors, 1 to 4 transparency bits) I/O: Joystick and console switch IO handled by 6532 RIOT and TIA Ports 2 joystick ports cartridge port expansion connector power in RF output Sound: TIA as used in the 2600 for video and sound. In 7800 mode it is only used for sound. At least two games include a POKEY sound chip for improved audio. Graphics Graphics are generated by the custom MARIA chip, which uses an approach common in contemporary arcade system boards and is different from other second and third generation consoles. Instead of a limited number of hardware sprites, MARIA treats everything as a sprite described in a series of display lists. Each display list contains pointers to graphics data and color and positioning information. MARIA supports a palette of 256 colors and graphics modes which are either 160 pixels wide or 320 pixels wide. While the 320 pixel modes theoretically enable the 7800 to create games at higher resolution than the 256 pixel wide graphics found in the Nintendo Entertainment System and Master System, the processing demands of MARIA result in most games using the 160 pixel mode. Each sprite can have from 1 to 12 colors, with 3 colors plus transparency being the most common. In this format, the sprite references one of 8 palettes, where each palette holds 3 colors. The background–visible when not covered by other objects–can also be assigned a color. In total, 25 colors can appear on a scan line. The graphics resolution, color palettes, and background color can be adjusted between scan lines. This can be used to render high resolution text in one area of the screen, while displaying more colorful graphics at lower resolution in the gameplay area. Sound The 7800 uses the TIA chip for two channel audio, the same chip used in the 1977 Atari VCS, and the sound is of the same quality as that system. To compensate, GCC's engineers allowed games to include a POKEY audio chip in the cartridge. Only Ballblazer and Commando do this. GCC planned to make a low-cost, high performance sound chip, GUMBY, which could also be placed in 7800 cartridges to enhance its sound capabilities further. This project was cancelled when Atari was sold to Jack Tramiel. Digitally signed cartridges Following the large number of low quality, third party games for the Atari 2600, Atari required that cartridges for the 7800 be digitally signed. When a cartridge is inserted into the system, the BIOS generates a signature of the cartridge ROM and compares it to the one stored on the cartridge. If they match, the console operates in 7800 mode, granting the game access to MARIA and other features, otherwise the console operates as a 2600. This digital signature code is not present in PAL 7800s, which use various heuristics to detect 2600 cartridges, due to export restrictions. Backward compatibility The 7800's compatibility with the Atari 2600 is made possible by including many of the same chips used in the 2600. When playing an Atari 2600 game, the 7800 uses a Television Interface Adapter chip to generate graphics and sound. The processor is slowed to 1.19 MHz, to mirror the performance of the 2600's 6507 chip. RAM is limited to 128 bytes and cartridge data is accessed in 4K blocks. When in 7800 mode (signified by the appearance of the full-screen Atari logo), the graphics are generated entirely by the MARIA graphics processing unit. All system RAM is available and cartridge data is accessed in larger 48K blocks. The system's SALLY 6502 runs at its normal 1.79 MHz. The 2600 chips are used to generate sound and to provide the interfaces to the controllers and console switches. System revisions Initial version: two joystick ports on lower front panel. Side expansion port for upgrades and add-ons. Bundled with two CX24 Pro-Line joysticks, AC adapter, switchbox, RCA connecting cable, and Pole Position II cartridge. Second revision: Slightly revised motherboard. Expansion port connector removed from motherboard but is still etched. Shell has indentation of where expansion port was to be. Third revision: Same as above but with only a small blemish on the shell where the expansion port was. Peripherals The Atari 7800 came bundled with the Atari Pro-Line Joystick, a two-button controller with a joystick for movement. The Pro-Line was developed for the 2600 and advertised in 1983, but delayed until Atari proceeded with the 7800. The right fire button only works as a separate fire button for certain 7800 games; otherwise, it duplicates the left fire button, allowing either button to be used for 2600 games. While physically compatible, the 7800's controllers do not work with the Sega Master System, and Sega's controllers are unable to use the 7800's two-button mode. In response to criticism over ergonomic issues with the Pro-Line controllers, Atari later released a joypad controller with the European 7800. Similar in style to controllers found on Nintendo and Sega systems, it was not available in the United States. The Atari XG-1 light gun, bundled with the Atari XEGS and also sold separately, is compatible with the 7800. Atari released five 7800 light gun games: Alien Brigade, Barnyard Blaster, Crossbow, Meltdown, and Sentinel. Canceled peripherals After the acquisition of the Atari Consumer Division by Jack Tramiel in 1984, several expansion options for the system were canceled: The High Score Cartridge was designed to save high scores for up to 65 separate games. The cartridge was intended as a pass-through device, similar to the later Game Genie. Nine games were programmed to support the cartridge. The expansion port, to allow for the addition of a planned computer keyboard and connection to laserdisc players and other peripherals, was removed in the second and third revisions of the 7800. A dual joystick holder was designed for Robotron: 2084 and future games like Battlezone, but not produced. Games While the system can play the over 400 games for the Atari 2600, there were only 59 official releases for the 7800. The lineup emphasized high-quality versions of games from the golden age of arcade video games like Joust, Centipede, and Asteroids, which at the time of the 1986 launch were four, six, and seven years old, respectively. Eleven games were developed and sold by three third-party companies under their own labels (Absolute Entertainment, Activision, and Froggo) with the rest published by Atari Corporation. Most of the games from Atari were developed by outside companies under contract. Some NES games were developed by companies who had licensed their title from a different arcade manufacturer. While the creator of the NES version would be restricted from making a competitive version of an NES game, the original arcade copyright holder was not precluded from licensing out rights for a home version of an arcade game to multiple systems. Through this loophole, Atari 7800 conversions of Mario Bros., Double Dragon, Commando, Rampage, Xenophobe, Ikari Warriors, and Kung-Fu Master were licensed and developed. A final batch of games was released by Atari in 1990: Alien Brigade, Basketbrawl, Fatal Run, Meltdown, Midnight Mutants, MotorPsycho, Ninja Golf, Planet Smashers, and Scrapyard Dog. Scrapyard Dog was later released for the Atari Lynx. Legacy Atari Flashback In 2004, the Infogrames-owned version of Atari released the Atari Flashback console. It resembles a miniature Atari 7800 and has five 7800 and fifteen 2600 games built-in. Built using the NES-On-A-Chip hardware instead of recreating the Atari 7800 hardware, it was criticized for failing to properly replicate the actual gaming experience. A subsequent 7800 project was cancelled after prototypes were made. Game development The digital signature long prevented aftermarket games from being developed. The signing software was eventually found and released at Classic Gaming Expo in 2001. Several new commercial Atari 7800 games such as Astro Blaster, Beef Drop, B*nQ, Combat 1990, CrazyBrix, Failsafe, Santa Simon, Super Pac-Man, and Space War have been released. Source code The source code for 13 games, the operating system, and the development tools which run on the Atari ST were discovered in a dumpster behind the Atari building in Sunnyvale, California. Commented assembly language source code was made available for Centipede, Commando, Crossbow, Desert Falcon, Dig Dug, Food Fight, Galaga, Hat Trick, Joust, Ms. Pac-Man, Super Stunt Cycle, Robotron: 2084, and Xevious. See also History of Atari List of Atari 7800 games List of Atari 2600 games References External links AtariAge – Comprehensive Atari 7800 database and information Atari 7800 Information & Resources Atari Museum – History of the Atari 7800 ProSystem Atari 7800 Development Wiki 7800 Home video game consoles Backward-compatible video game consoles Third-generation video game consoles 1986 in video gaming Computer-related introductions in 1986 Products introduced in 1986 Products and services discontinued in 1992 1980s toys

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Atari Jaguar

The Atari Jaguar is a home video game console developed by Atari Corporation and released in North America in November 1993. Part of the fifth generation of video game consoles, it competed with the 16-bit Sega Genesis and Super NES and the 32-bit 3DO Interactive Multiplayer that launched the same year. Despite its two custom 32-bit Tom and in addition to a Motorola 68000, Atari marketed it as the world's first 64-bit game system, emphasizing its 64-bit bus used by the blitter. The Jaguar launched with Cybermorph as the pack-in game, which received divisive reviews. The system's library ultimately comprised only 50 licensed games. Development of the Atari Jaguar started in the early 1990s by Flare Technology, which focused on the system after cancellation of the Atari Panther console. The multi-chip architecture, hardware bugs, and poor tools made writing games for the Jaguar difficult. Underwhelming sales further eroded the console's third-party support. Atari attempted to extend the lifespan of the system with the Atari Jaguar CD add-on, with an additional 13 games, and emphasizing the Jaguar's price of over less than its competitors. With the release of the Sega Saturn and Sony PlayStation in 1995, sales of the Jaguar continued to fall. It sold no more than 150,000 units before it was discontinued in 1996. The commercial failure of the Jaguar prompted Atari to leave the console market. After Hasbro Interactive acquired all Atari Corporation properties, the patents of the Jaguar were released into the public domain, with the console declared an open platform. Since its discontinuation, hobbyists have produced games for the system. History Development The Jaguar was developed by the members of Flare Technology, a company formed by Martin Brennan and John Mathieson. The team had claimed that they could not only make a console superior to the Genesis or the Super NES, but they could also be cost-effective. Impressed by their work on the Konix Multisystem, Atari persuaded them to close Flare and form a new company called Flare II, with Atari providing the funding. Flare II initially set to work designing two consoles for Atari. One was a 32-bit architecture (codenamed Panther), and the other was a 64-bit system (codenamed Jaguar). Work on the Jaguar design progressed faster than expected, so Atari canceled the Panther project to focus on the more promising Jaguar. The Jaguar was unveiled in August 1993 at the Chicago Consumer Entertainment Show. To prepare for its launch, the Atari ST computer line was discontinued, and support for earlier systems such as the Atari 2600 and Atari 8-bit family, had already been dropped on January 1, 1992. All 20,000 Jaguar units shipped during its test launch in 1993 were sold. Launch The Jaguar was launched on November 23, 1993, at a price of $249.99, under a $500 million manufacturing deal with IBM. The system was initially available only in the test markets of New York City and San Francisco, with the slogan "Do the Math", claiming superiority over competing 16-bit and 32-bit systems. During this test launch Atari sold all 20,000 units hoping it would rally support for the system. A nationwide release followed six months later, in early 1994. Computer Gaming World wrote in January 1994 that the Jaguar was "a great machine in search of a developer/customer base", as Atari had to "overcome the stigma of its name (lack of marketing and customer support, as well as poor developer relations in the past)". The company "ventured late into third party software support" while competing console 3DO's "18 month public relations blitz" would result in "an avalanche of software support", the magazine reported. The Jaguar struggled to attain a substantial user base. Atari reported that it had shipped 17,000 units as part of the system's initial test market in 1993. By the end of 1994, it reported that it had sold approximately 100,000 units. Bit count controversy Atari tried to downplay competing consoles by proclaiming the Jaguar was the only "64-bit" system. This claim is questioned by some, because the Motorola 68000 CPU and the Tom and Jerry coprocessors execute 32-bit instruction sets. Atari's reasoning that the 32-bit Tom and Jerry chips work in tandem to add up to a 64-bit system was ridiculed in a mini-editorial by Electronic Gaming Monthly, which commented that "If Sega did the math for the Sega Saturn the way Atari did the math for their 64-bit Jaguar system, the Sega Saturn would be a 112-bit monster of a machine." Next Generation, while giving a mostly negative review of the Jaguar, maintained that it is a true 64-bit system, since the data path from the DRAM to the CPU and Tom and Jerry chips is 64 bits wide. Arrival of Saturn and PlayStation In early 1995, Atari announced that they had dropped the price of the Jaguar to $149.99 be more competitive. Atari ran infomercials with enthusiastic salesmen touting the game system. These aired for most of 1995, but did not sell the remaining stock of Jaguar systems. In a 1995 interview with Next Generation, then-CEO Sam Tramiel declared that the Jaguar was as powerful, if not more powerful, than the newly launched Sega Saturn, and slightly weaker than the upcoming PlayStation. Next Generation received a deluge of letters in response to Tramiel's comments, particularly his threat to bring Sony to court for price dumping if the PlayStation entered the U.S. market at a retail price below $300. Many readers found this threat hollow and hypocritical, since Tramiel noted in the same interview that Atari was selling the Jaguar at a loss. The editor responded that price dumping does not have to do with a product being priced below cost, but its being priced much lower in one country than anotherwhich, as Tramiel said, is illegal. Tramiel and Next Generation agreed that the PlayStation's Japanese price converts to approximately $500. His remark that the small number of third party Jaguar games was good for Atari's profitability, angered Jaguar owners who were already frustrated at how few games were coming out for the system. In Atari's 1995 annual report, it noted: In addition, Atari had severely limited financial resources, and so could not create the level of marketing which has historically backed successful gaming consoles. Decline By November 1995, mass layoffs and insider statements were fueling journalistic speculation that Atari had ceased both development and manufacturing for the Jaguar and was simply trying to sell off existing stock before exiting the video game industry. Although Atari continued to deny these theories going into 1996, core Jaguar developers such as High Voltage Software and Beyond Games stated that they were no longer receiving communications from Atari regarding future Jaguar projects. In its 10-K405 SEC Filing, filed April 12, 1996, Atari informed stockholders that its revenues had declined by more than half, from $38.7 million in 1994 to $14.6 million in 1995, then gave them the news on the truly dire nature of the Jaguar: The filing confirmed that Atari had abandoned the Jaguar in November 1995 and in the subsequent months were concerned chiefly with liquidating its inventory of Jaguar products. On April 8, 1996, Atari Corporation agreed to merge with JTS, Inc. in a reverse takeover, thus forming JTS Corporation. The merger was finalized on July 30. After the merger, the bulk of Jaguar inventory remained unsold and would be finally moved out to Tiger Software, a private liquidator, on December 23, 1996. On March 13, 1998, JTS sold the Atari name and all of the Atari properties to Hasbro Interactive. Technical specifications From the Jaguar Software Reference manual, page 1: Design specs for the console allude to the GPU or DSP being capable of acting as a CPU, leaving the Motorola 68000 to read controller inputs. Atari's Leonard Tramiel also specifically suggested that the 68000 not be used by developers. In practice, however, many developers use the Motorola 68000 to drive gameplay logic due to the greater developer familiarity of the 68000 and the adequacy of the 68000 for certain types of games. Most critically, a flaw in the memory controller means that certain obscure conventions must be followed for the RISC chips to be able to execute code from RAM. Processors Tom chip, 26.59 MHz Graphics processing unit (GPU) – 32-bit RISC architecture, 4 KB internal RAM, all graphical effects are software-based, with additional instructions intended for 3D operations Object Processor – 64-bit fixed-function video processor, converts display lists to video output at scan time. Blitter – 64-bit high speed logic operations, z-buffering and Gouraud shading, with 64-bit internal registers. DRAM controller, 8-, 16-, 32- and 64-bit memory management Jerry chip, 26.59 MHz Digital Signal Processor – 32-bit RISC architecture, 8 KB internal RAM Similar RISC core as the GPU, additional instructions intended for audio operations CD-quality sound (16-bit stereo) Number of sound channels limited by software Two DACs (stereo) convert digital data to analog sound signals Full stereo capabilities Wavetable synthesis and AM synthesis A clock control block, incorporating timers, and a UART Joystick control Motorola 68000 - system processor "used as a manager". General purpose 16-/32-bit control processor, 13.295 MHz Other features RAM: 2 MB on a 64-bit bus using 4 16-bit fast-page-mode DRAMs (80 ns) Storage: ROM cartridges – up to 6 MB DSP-port (JagLink) Monitor-port (composite/S-Video/RGB) Antenna-port (UHF/VHF) - fixed at 591 MHz in Europe; not present on French model Support for ComLynx I/O NTSC/PAL machines can be identified by their power LED colour, Red: NTSC; Green: PAL. COJAG arcade games Atari Games licensed the Atari Jaguar's chipset for use in its arcade games. The system, named COJAG (for "Coin-Op Jaguar"), replaced the 68000 with a 68020 or MIPS R3000-based CPU (depending on the board version), added more RAM, a full 64-bit wide ROM bus (Jaguar ROM bus being 32-bit), and optionally a hard drive (some games such as Freeze are ROM only). It runs the lightgun games Area 51 and Maximum Force, which were released by Atari as dedicated cabinets or as the Area 51 and Maximum Force combo machine. Other games were developed but never released: 3 On 3 Basketball, Fishin' Frenzy, Freeze, and Vicious Circle. Peripherals Prior to the launch of the console in November 1993, Atari had announced a variety of peripherals to be released over the console's lifespan. This includes a CD-ROM-based console, a dial-up Internet link with support for online gaming, a virtual reality headset, and an MPEG-2 video card. However, due to the poor sales and eventual commercial failure of the Jaguar, most of the peripherals in development were canceled. The only peripherals and add-ons released by Atari for the Jaguar are a redesigned controller, an adapter for four players, a CD console add-on, and a link cable for local area network (LAN) gaming. The redesigned second controller, the ProController by Atari, added three more face buttons and two triggers. It was created in response to the criticism of the original controller, said to lack enough buttons for fighting games in particular. Sold independently, however, it was never bundled with the system. The Team Tap multitap adds 4-controller support, compatible only with the optionally bundled White Men Can't Jump and NBA Jam Tournament Edition. Eight player gameplay with two Team Taps is possible but unsupported by those games. For LAN multiplayer support, the Jaglink Interface links two Jaguar consoles through a modular extension and a UTP phone cable. It is compatible with three games: AirCars, BattleSphere, and Doom. In 1994 at the CES, Atari announced that it had partnered with Phylon, Inc. to create the Jaguar Voice/Data Communicator. The unit was delayed and an estimated 100 units were produced, but eventually in 1995 mass production was canceled. The Jaguar Voice Modem or JVM utilizes a 19.9kbit/s dial up modem to answer incoming phone calls and store up to 18 phone numbers. Players directly dial each other for online play, only compatible with Ultra Vortek which initializes the modem by entering 911 on the key pad at startup. Jaguar CD The Jaguar CD is a CD-ROM peripheral for games. It was released in September 1995, two years after the Jaguar's launch. Twelve CD games were released during its manufacturing lifetime, with more being made later by homebrew developers. Each Jaguar CD unit has a Virtual Light Machine, which displays light patterns corresponding to music, if the user inserts an audio CD into the console. It was developed by Jeff Minter, after experimenting with graphics during the development of Tempest 2000. The program was deemed a spiritual successor to the Atari Video Music, a visualizer released in 1976. The Memory Track is a cartridge accessory for the Jaguar CD, providing Jaguar CD games with 128 K EEPROM for persistent storage of data such as preferences and saved games. Atari planned a second Jaguar model that combined both the Jaguar and the Jaguar CD into one unit, a la the TurboDuo. The Atari Jaguar Duo (codenamed Jaguar III) was a proposal to integrate the Jaguar CD to make a new console, a concept similar to the TurboDuo and Genesis CDX. A prototype, described by journalists as resembling a bathroom scale, was unveiled at the 1995 Winter Consumer Electronics Show, but the console was canceled before production. Jaguar VR A virtual reality headset compatible with the console, tentatively titled the Jaguar VR, was unveiled by Atari at the 1995 Winter Consumer Electronics Show. The development of the peripheral was a response to Nintendo's virtual reality console, the Virtual Boy, which had been announced the previous year. The headset was developed in cooperation with Virtuality, which had previously created many virtual reality arcade systems, and was already developing a similar headset for practical purposes, named Project Elysium, for IBM. The peripheral was targeted for a commercial release before Christmas 1995. However, the deal with Virtuality was abandoned in October 1995. After Atari's merger with JTS in 1996, all prototypes of the headset were allegedly destroyed. However, two working units, one low-resolution prototype with red and grey-colored graphics and one high-resolution prototype with blue and grey-colored graphics, have since been recovered, and are regularly showcased at retrogaming-themed conventions and festivals. Only one game was developed for the Jaguar VR prototype: a 3D-rendered version of the 1980 arcade game Missile Command, titled Missile Command 3D, and a demo of Virtuality's Zone Hunter was created. Unlicensed peripherals An unofficial expansion peripheral for the Atari Jaguar dubbed the "Catbox" was released by the Rockford, Illinois company ICD. It was originally slated to be released early in the Jaguar's life, in the second quarter of 1994, but was not actually released until mid-1995. The ICD CatBox plugs directly into the AV/DSP connectors located in the rear of the Jaguar console and provides three main functions. These are audio, video, and communications. It features six output formats, three for audio (line level stereo, RGB monitor, headphone jack with volume control) and three for video (composite, S-Video, and RGB analog component video) making the Jaguar compatible with multiple high quality monitor systems and multiple monitors at the same time. It is capable of communications methods known as CatNet and RS-232 as well as DSP pass through, allowing the user to connect two or more Jaguars together for multiplayer games either directly or with modems. The ICD CatBox features a polished stainless steel casing and red LEDs in the jaguar's eyes on the logo that indicate communications activity. An IBM AT-type null modem cable may be used to connect two Jaguars together. The CatBox is also compatible with Atari's Jaglink Interface peripheral. An adaptor for the Jaguar that allows for WebTV access was revealed in 1998; one prototype is known to exist. Game library Reception Reviewing the Jaguar just a few weeks prior to its launch, GamePro gave it a "thumbs sideways". They praised the power of the hardware but criticized the controller, and were dubious of how the software lineup would turn out, commenting that Atari's failure to secure support from key third party publishers such as Capcom was a bad sign. They concluded that "Like the 3DO, the Jaguar is a risky investment – just not quite as expensive." The Jaguar won GameFan'''s "Best New System" award for 1993. The small size and poor quality of the Jaguar's game library became the most commonly cited reason for its failure in the marketplace. The pack-in game Cybermorph was one of the first polygon-based games for consoles, but was criticized for design flaws and a weak color palette, and compared unfavorably with the SNES's Star Fox. Other early releases like Trevor McFur in the Crescent Galaxy, Raiden, and Evolution: Dino Dudes also received poor reviews, the latter two for failing to take full advantage of the Jaguar's hardware. Jaguar did eventually earn praise with games such as Tempest 2000, Doom, and Wolfenstein 3D. The most successful title during the Jaguar's first year was Alien vs. Predator. However, these occasional successes were seen as insufficient while the Jaguar's competitors were receiving a continual stream of critically acclaimed software; GamePro concluded their rave review of Alien vs. Predator by remarking "If Atari can turn out a dozen more games like AvP, Jaguar owners could truly rest easy and enjoy their purchase." In late 1995 reviews of the Jaguar, Game Players remarked, "The Jaguar suffers from several problems, most importantly the lack of good software." and Next Generation likewise commented that "thus far, Atari has spectacularly failed to deliver on the software side, leaving many to question the actual quality and capability of the hardware. With only one or two exceptions – Tempest 2000 is cited most frequently – there have just been no truly great games for the Jaguar up to now." They further noted that while Atari is well known by older gamers, the company had much less overall brand recognition than Sega, Sony, Nintendo, or even The 3DO Company. However, they argued that with its low price point, the Jaguar might still compete if Atari could improve the software situation. They gave the system two out of five stars. Game Players also stated the despite being 64-bit, the Jaguar is much less powerful than the 3DO, Saturn, and PlayStation, even when supplemented with the Jaguar CD. With such a small library of games to challenge the incumbent 16-bit game consoles, Jaguar's appeal never grew beyond a small gaming audience. Digital Spy commented: "Like many failed hardware ventures, it still maintains something of a cult following but can only be considered a misstep for Atari." In 2006 IGN editor Craig Harris rated the standard Jaguar controller as the worst game controller ever, criticizing the unwarranted recycling of the 1980s "phone keypad" format and the small number of action buttons, which he found particularly unwise given that Atari was actively trying to court fighting game fans to the system. Ed Semrad of Electronic Gaming Monthly commented that many Jaguar games gratuitously used all of the controller's phone keypad buttons, making the controls much more difficult than they needed to be. GamePros The Watch Dog remarked, "The controller usually doesn't use the keypad, and for games that use the keypad extensively (Alien vs. Predator, Doom), a keypad overlay is used to minimize confusion. But yes, it is a lot of buttons for nuttin'." Atari added more action buttons for its Pro Controller, to improve performance in fighting games in particular. Legacy Telegames continued to publish games for the Jaguar after it was discontinued, and for a time was the only company to do so. On May 14, 1999, Hasbro Interactive announced that it had released all patents to the Jaguar, declaring it an open platform; this opened the doors for extensive homebrew development. Following the announcement, Songbird Productions joined Telegames in releasing unfinished Jaguar games alongside new games to satisfy the cult following. Hasbro Interactive, along with all the Atari properties, was sold to Infogrames on January 29, 2001. In the United Kingdom in 2001, Telegames and retailer Game made a deal to bring the Jaguar to Game's retail outlets. It was initially sold for £29.99 new and software ranged between £9.99 for more common games such as Doom and Ruiner Pinball and £39.99 for rarer releases such as Defender 2000 and Checkered Flag. The machine had a presence in the stores until 2007, when remaining consoles were sold off for £9.99 and games were sold for as low as 97p. In 1997, Imagin Systems, a manufacturer of dental imaging equipment, purchased the Jaguar cartridge and console molds from JTS. The console molds could, with minor modification, fit their HotRod camera, and the cartridge molds were reused to create an optional memory expansion card. In December 2014, the molds were purchased from Imagin Systems by Mike Kennedy, owner of the Kickstarter funded Retro Videogame Magazine'', to propose a new crowdfunded video game console, the Retro VGS, later rebranded the Coleco Chameleon after entering a licensing agreement with Coleco. The purchase of the molds was far cheaper than designing and manufacturing entirely new molds, and Kennedy described their acquisition as "the entire reason [the Retro VGS] is possible". However, the project was terminated in March 2016 following criticism of Kennedy and doubts regarding demand for the proposed console. Two "prototypes" were discovered to be fakes and Coleco withdrew from the project. After the project's termination, the molds were sold to Albert Yarusso, the founder of the AtariAge website. See also Contiki, portable operating system, including a port for the Jaguar with GUI, TCP/IP, and web browser support. Retro VGS References External links Atari Jaguar review, 1994 Products introduced in 1993 Products and services discontinued in 1996 Jaguar duo Home video game consoles Fifth-generation video game consoles 1990s toys 68k architecture

2783

https://en.wikipedia.org/wiki/Atari%20Lynx

Atari Lynx

The Atari Lynx is a hybrid 8-bit and 16-bit handheld game console released by Atari Corporation in September 1989 in North America, and in Europe and Japan in 1990. It arose as the first handheld game console with a color LCD screen. Its advanced graphics and ambidextrous layout competed with Nintendo's Game Boy (released two months earlier), and with the Game Gear and TurboExpress, both released the following year. It was discontinued in 1995. History The Lynx system was originally developed by Epyx as the Handy Game. In 1986, two former Amiga designers, R. J. Mical and Dave Needle, had been asked by former manager at Amiga, David Morse, to design a portable gaming system. Morse now worked at Epyx, a game software company with a recent string of hit games. Morse's son had asked him if he could make a portable gaming system, prompting a meeting with Mical and Needle to discuss the idea. Morse convinced Mical and Needle and they were hired by Epyx to be a part of the design team. Planning and design of the console began in 1986 and was completed in 1987. Epyx first showed the Handy system at the Winter Consumer Electronics Show (CES) in January 1989. Facing financial difficulties, Epyx sought partners. Nintendo, Sega, and other companies declined, but Atari and Epyx eventually agreed that Atari would handle production and marketing, and Epyx would handle software development. Epyx declared bankruptcy by the end of the year, and Atari essentially owned the entire project; both Atari and others, however, had to purchase Amigas from Atari arch-rival Commodore to develop Lynx software. The Handy was designed to run games from the cartridge format, and the game data must be copied from ROM to RAM before it can be used. Thus, less RAM is then available and each game's initial loading is slow. There are trace remnants of a cassette tape interface physically capable of being programmed to read a tape. Lynx developers have noted that "there is still reference of the tape and some hardware addresses" and an updated vintage Epyx manual describes the bare existence of what could be utilized for tape support. A 2009 retrospective interview with Mical clarifies that there is no truth to some early reports claiming that games were loaded from tape, and elaborates, "We did think about hard disk a little." Atari changed the internal speaker and removed the thumb stick on the control pad. At Summer 1989 CES, Atari's press demonstration included the "Portable Color Entertainment System", which was changed to "Lynx" when distributed to resellers, initially retailing in the US at . Its launch was successful. Atari reported that it had sold 90% of the 50,000 units shipped in the launch month in the U.S. with a limited launch in New York. US sales in 1990 were approximately 500,000 units according to the Associated Press. In late 1991, it was reported that Atari sales estimates were about 800,000, which Atari claimed was within its expected projections. Lifetime sales by 1995 amount to fewer than 7 million units when combined with the Game Gear. In comparison, 16 million Game Boy units were sold by 1995 because of its ruggedness, half price, much longer battery life, bundling with the smash hit Tetris, and superior game library. As with the console units, the game cartridge design evolved over the first year of the console's release. The first generation of cartridges are flat, and designed to be stackable for ease of storage. However, this design proved to be very difficult to remove from the console and was replaced by a second design. This style, called "tabbed" or "ridged", adds two small tabs on the underside to aid in removal. The original flat style cartridges can be stacked on top of the newer cartridges, but the newer cartridges can not be easily stacked on each other, nor were they stored easily. Thus a third style, the "curved lip" style was produced, and all official and third-party cartridges during the console's lifespan were released (or re-released) using this style. In May 1991, Sega launched its Game Gear portable gaming handheld with a color screen. In comparison to the Lynx it had a higher cost and shorter battery life (3–4 hours as opposed to 4-5 for the Lynx), but it is slightly smaller and has significantly more games. Retailers such as Game and Toys "R" Us continued to sell the Lynx well into the mid-1990s on the back of the Atari Jaguar launch, helped by magazines such as Ultimate Future Games which continued to cover the Lynx alongside the new generation of 32-bit and 64-bit consoles. Lynx II During 1990, the Lynx had moderate sales. In July 1991, Atari introduced the Lynx II with a new marketing campaign, new packaging, slightly improved hardware, better battery life, and a new sleeker look. The new system (referred to within Atari as the "Lynx II") features rubber hand grips and a clearer backlit color screen with a power save option (which turn off the LCD panel's backlighting). It replaced the monaural headphone jack of the original Lynx with one wired for stereo. The new packaging made the Lynx available without any accessories, dropping the price to . Although sales improved, Nintendo still dominated the handheld market. Decline In 1993, Atari started shifting its focus away from the Lynx in order to prepare for the launch of the Jaguar; a few games were released during that time, including Battlezone 2000. Support for the Lynx was formally discontinued in 1995. After the respective launches of the Sega Saturn and Sony PlayStation drastically caused the commercial failure of the Jaguar, Atari terminated all internal game and hardware development in late 1995 and, by early 1996, agreed to a reverse merger with JTS, Inc. which was completed on July 30, 1996. Features The Atari Lynx's features include being the first color handheld, with a backlit display, a switchable right- and left-handed (upside down) configuration, and the ability to network with up to 15 other units via its Comlynx system (though most games network eight or fewer players). Comlynx was originally developed to run over infrared links, codenamed RedEye. This was changed to a cable-based networking system before the final release. According to Peter Engelbrite, when players walked through the beam, the link would be interrupted. The maximum stable connection allowed was eight players. Engelbrite also developed the first recordable eight-player co-op game, and the only eight-player game for the Atari Lynx, Todd's Adventures in Slime World, using the Comlynx system. Each Lynx needs a copy of the game, and one cable can connect two machines. The cables can be connected into a chain. The Lynx was cited as the "first gaming console with hardware support for zooming and distortion of sprites". Featuring a 4096 color palette and integrated math and graphics co-processors (including a blitter unit), its pseudo-3D color graphics display was said to be the key defining feature in the system's competition against Nintendo's monochromatic Game Boy. The fast pseudo-3D graphics features were made possible on a minimal hardware system by co-designer Dave Needle having "invented the technique for planar expansion/shrinking capability" and using stretched, textured, triangles instead of full polygons. Technical specifications Mikey (8-bit custom CMOS chip running at 16 MHz) WDC 8-bit 65SC02 processor (based on the MOS 6502) running at up to 4 MHz (3.6 MHz average) Sound engine 4 channel sound 8-bit DAC for each channel (4 channels × 8-bits/channel = 32 bits commonly quoted) these four sound channels can also switch in analogue sound mode to generate PSG sound . Atari reports the range is "100 Hz to above the range of human hearing"; spectrum analysis shows the range may go as low as 32 Hz. Stereo with panning (Lynx II PAG-0401 only, original Lynx and early Lynx II are mono) Video DMA driver for liquid-crystal display Custom built and designed by Jay Miner and David Morse 160×102 pixels resolution 4,096 color (12-bit) palette 16 simultaneous colors (4 bits) from palette per scanline Variable frame rate (up to 75 frames/second) Eight system timers (two reserved for LCD timing, one for UART) Interrupt controller UART (for Comlynx) (fixed format 8E1, up to 62500 Bd) 512 bytes of bootstrap and game-card loading ROM Suzy (16-bit custom CMOS chip running at ) Unlimited number of blitter "sprites" with collision detection Hardware sprite scaling, distortion, and tilting effects Hardware decoding of compressed sprite data Hardware clipping and multi-directional scrolling Math engine Hardware 16-bit × 16-bit → 32-bit multiply with optional accumulation; 32-bit ÷ 16-bit → 16-bit divide Parallel processing of CPU RAM: 64 KB 120ns DRAM Cartridges of 128, 256, 512KiB and (with bank-switching) 1MiB Ports: Headphone port ( stereo; wired for mono on the original Lynx) ComLynx (multiple unit communications, serial) LCD Screen: 3.5" diagonal Battery holder (six AA) 4–5 hours (Lynx I) 5–6 hours (Lynx II) Reception Lynx was reviewed in 1990 in Dragon, which gave it 5 out of 5 stars. The review states that the Lynx "throws the Game Boy into the prehistoric age", and praises the built-in object scaling capabilities, the multiplayer feature of the ComLynx cable, and the strong set of launch games. Legacy Telegames released several games in the late 1990s, including a port of Raiden and a platformer called Fat Bobby in 1997, and an action sports game called Hyperdrome in 1999. On March 13, 1998, nearly three years after the Lynx's discontinuation, JTS Corporation sold all of the Atari assets to Hasbro Interactive for $5 million. On May 14, 1999, Hasbro, which held on to those properties until selling Hasbro Interactive to Infogrames in 2001, released into the public domain all the rights relating to the Atari Jaguar, declaring it an open platform and allowing anyone to freely create and publish software for the Jaguar without the need of a license. Internet theories say that the Lynx may have also been opened up to the public at the same time as the Jaguar, but this is clearly disputed. Nevertheless, since discontinuation, the Lynx, like the Jaguar, has continued to receive support from a grassroots community which would go on to produce many successful homebrew games such as T-Tris (the first Lynx game with a save-game feature), Alpine Games, and Zaku. In 2008, Atari was honored at the 59th Annual Technology & Engineering Emmy Awards for pioneering the development of handheld games with the Lynx. See also List of Atari Lynx games History of Atari References External links AtariAge – Comprehensive Lynx Database and information Guide to Atari Lynx games at Retro Video Gamer Too Powerful for Its Own Good, Atari's Lynx Remains a Favorite 25 Years Later Atari Lynx review, 1990 Atari Lynx Hardware Documentation Atari Lynx Development Wiki Computer-related introductions in 1989 Handheld game consoles Fourth-generation video game consoles Lynx 1980s toys 1990s toys Public domain in the United States

2784

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

Ahimsa

Ahimsa (, IAST: ahiṃsā, ; ), less commonly spelled ahinsa, is an ancient Indian principle of nonviolence which applies to all living beings. It is a key virtue in the Dhārmic religions: Jainism, Buddhism, and Hinduism. Ahimsa is one of the cardinal virtues of Jainism, where it is first of the Pancha Mahavrata. It is also the first of the five precepts of Buddhism. Ahimsa is a multidimensional concept, inspired by the premise that all living beings have the spark of the divine spiritual energy; therefore, to hurt another being is to hurt oneself. Ahimsa has also been related to the notion that any violence has karmic consequences. While ancient scholars of Hinduism pioneered and refined the principles of Ahimsa, the concept also reached an extraordinary development in the ethical philosophy of Jainism. Lord Parsvanatha, the twenty-third tirthankara of Jainism, revived and preached the concept of non-violence in the 9th century BCE. Mahavira, the twenty-fourth and the last tirthankara, further strengthened the idea in the 6th century BCE. Between the 1st century BCE and 5th century CE, Valluvar emphasized ahimsa and moral vegetarianism as virtues for an individual, which formed the core of his teachings. Perhaps the most popular advocate of the principle of Ahimsa was Mahatma Gandhi. Ahimsa's precept of 'cause no injury' includes one's deeds, words, and thoughts. Classical Hindu texts like the Mahabharata and Ramayana, as well as modern scholars, debate principles of Ahimsa when one is faced with war and situations requiring self-defence. Historical Indian literature has in this way contributed to modern theories of just war and self-defence. Etymology The word Ahimsa—sometimes spelled Ahinsa—is derived from the Sanskrit root hiṃs, meaning to strike; hiṃsā is injury or harm, while a-hiṃsā, its opposite, is non-harming or nonviolence. Origins The idea of reverence for ahiṃsā exist in Hindu, Jain and Buddhist canonical texts. Parshvanatha preached ahimsa as one of the four vows in 9th century BCE. No other Indian religion has developed the non-violence doctrine and its implications on everyday life as has Jainism. Hinduism Ancient Vedic texts Ahimsa as an ethical concept evolved in the Vedic texts. The oldest scriptures indirectly mention Ahimsa, but do not emphasize it. Over time, the Hindu scripts revise ritual practices and the concept of Ahimsa is increasingly refined and emphasized, until Ahimsa becomes the highest virtue by the late Vedic era (about 500 BCE). For example, hymn 10.22.25 in the Rig Veda uses the words Satya (truthfulness) and Ahimsa in a prayer to deity Indra; later, the Yajur Veda dated to be between 1000 BCE and 600 BCE, states, "may all beings look at me with a friendly eye, may I do likewise, and may we look at each other with the eyes of a friend". The term Ahimsa appears in the text Taittiriya Shakha of the Yajurveda (TS 5.2.8.7), where it refers to non-injury to the sacrificer himself. It occurs several times in the Shatapatha Brahmana in the sense of "non-injury". The Ahimsa doctrine is a late Vedic era development in Brahmanical culture. The earliest reference to the idea of non-violence to animals (pashu-Ahimsa), apparently in a moral sense, is in the Kapisthala Katha Samhita of the Yajurveda (KapS 31.11), which may have been written in about the 8th century BCE. Bowker states the word appears but is uncommon in the principal Upanishads. Kaneda gives examples of the word Ahimsa in these Upanishads. Other scholars suggest Ahimsa as an ethical concept that started evolving in the Vedas, becoming an increasingly central concept in Upanishads. The Chāndogya Upaniṣad, dated to the 8th or 7th century BCE, one of the oldest Upanishads, has the earliest evidence for the Vedic era use of the word Ahimsa in the sense familiar in Hinduism (a code of conduct). It bars violence against "all creatures" (sarvabhuta) and the practitioner of Ahimsa is said to escape from the cycle of rebirths (CU 8.15.1). Some scholars state that this 8th or 7th century BCE mention may have been an influence of Jainism on Vedic Hinduism. Others scholar state that this relationship is speculative, and though Jainism is an ancient tradition the oldest traceable texts of Jainism tradition are from many centuries after the Vedic era ended. Chāndogya Upaniṣad also names Ahimsa, along with Satyavacanam (truthfulness), Ārjavam (sincerity), Dānam (charity), Tapo (penance/meditation), as one of five essential virtues (CU 3.17.4). The Sandilya Upanishad lists ten forbearances: Ahimsa, Satya, Asteya, Brahmacharya, Daya, Arjava, Kshama, Dhriti, Mitahara and Saucha. According to Kaneda, the term Ahimsa is an important spiritual doctrine shared by Hinduism, Buddhism and Jainism. It literally means 'non-injury' and 'non-killing'. It implies the total avoidance of harming of any kind of living creatures not only by deeds, but also by words and in thoughts. The Epics The Mahabharata, one of the epics of Hinduism, has multiple mentions of the phrase Ahimsa Paramo Dharma (अहिंसा परमॊ धर्मः), which literally means: non-violence is the highest moral virtue. For example, Anushasana Parva has the verse: अहिंसा परमॊ धर्मः तथाहिंसा परॊ दमः। अहिंसा परमं दानम् अहिंसा परमस तपः। अहिंसा परमॊ यज्ञः तथाहिस्मा परं बलम्। अहिंसा परमं मित्रम् अहिंसा परमं सुखम्। अहिंसा परमं सत्यम् अहिंसा परमं श्रुतम्॥ The above passage from Mahabharata emphasises the cardinal importance of Ahimsa in Hinduism, and literally means: Ahimsa is the highest Dharma, Ahimsa is the highest self-control, Ahimsa is the greatest gift, Ahimsa is the best practice, Ahimsa is the highest sacrifice, Ahimsa is the finest strength, Ahimsa is the greatest friend, Ahimsa is the greatest happiness, Ahimsa is the highest truth, and Ahimsa is the greatest teaching.Ahimsa: To do no harm Subramuniyaswami, What is Hinduism?, Chapter 45, Pages 359–361 Some other examples where the phrase Ahimsa Paramo Dharma are discussed include Adi Parva, Vana Parva and Anushasana Parva. The Bhagavad Gita, among other things, discusses the doubts and questions about appropriate response when one faces systematic violence or war. These verses develop the concepts of lawful violence in self-defence and the theories of just war. However, there is no consensus on this interpretation. Gandhi, for example, considers this debate about non-violence and lawful violence as a mere metaphor for the internal war within each human being, when he or she faces moral questions. Self-defence, criminal law, and war The classical texts of Hinduism devote numerous chapters discussing what people who practice the virtue of Ahimsa, can and must do when they are faced with war, violent threat or need to sentence someone convicted of a crime. These discussions have led to theories of just war, theories of reasonable self-defence and theories of proportionate punishment. Arthashastra discusses, among other things, why and what constitutes proportionate response and punishment. War The precepts of Ahimsa under Hinduism require that war must be avoided, with sincere and truthful dialogue. Force must be the last resort. If war becomes necessary, its cause must be just, its purpose virtuous, its objective to restrain the wicked, its aim peace, its method lawful. War can only be started and stopped by a legitimate authority. Weapons used must be proportionate to the opponent and the aim of war, not indiscriminate tools of destruction. All strategies and weapons used in the war must be to defeat the opponent, not designed to cause misery to the opponent; for example, use of arrows is allowed, but use of arrows smeared with painful poison is not allowed. Warriors must use judgment in the battlefield. Cruelty to the opponent during war is forbidden. Wounded, unarmed opponent warriors must not be attacked or killed, they must be brought to your realm and given medical treatment. Children, women and civilians must not be injured. While the war is in progress, sincere dialogue for peace must continue. Self-defence In matters of self-defence, different interpretations of ancient Hindu texts have been offered. For example, Tähtinen suggests self-defence is appropriate, criminals are not protected by the rule of Ahimsa, and Hindu scriptures support the use of violence against an armed attacker. Ahimsa is not meant to imply pacifism. Alternate theories of self-defence, inspired by Ahimsa, build principles similar to theories of just war. Aikido, pioneered in Japan, illustrates one such principles of self-defence. Morihei Ueshiba, the founder of Aikido, described his inspiration as Ahimsa. According to this interpretation of Ahimsa in self-defence, one must not assume that the world is free of aggression. One must presume that some people will, out of ignorance, error or fear, attack other persons or intrude into their space, physically or verbally. The aim of self-defence, suggested Ueshiba, must be to neutralise the aggression of the attacker, and avoid the conflict. The best defence is one where the victim is protected, as well as the attacker is respected and not injured if possible. Under Ahimsa and Aikido, there are no enemies, and appropriate self-defence focuses on neutralising the immaturity, assumptions and aggressive strivings of the attacker. Criminal law Tähtinen concludes that Hindus have no misgivings about the death penalty; their position is that evil-doers who deserve death should be killed, and that a king in particular is obliged to punish criminals and should not hesitate to kill them, even if they happen to be his own brothers and sons. Other scholars conclude that the scriptures of Hinduism suggest sentences for any crime must be fair, proportional and not cruel. Non-human life The Hindu precept of 'cause no injury' applies to animals and all life forms. This precept isn't found in the oldest verses of Vedas (1500–1000 BCE), but increasingly becomes one of the central ideas in post-Vedic period. In the oldest layer of the Vedas, such as the Rigveda, ritual sacrifices of animals and cooking of meat to feed guests are mentioned. This included goat, ox, horse and others (or may be misinterpretation of verses). However, the text is not uniform in the prescriptive sense. Some verses praise meat as food, while other verses in the Vedas also recommend "abstention from meat", in particular, "beef". According to Marvin Harris, the Vedic literature is inconsistent, with some verses suggesting ritual slaughter and meat consumption, while others suggesting a taboo on meat-eating. Hindu texts dated to 1st millennium BC, initially mention meat as food, then evolve to suggestions that only meat obtained through ritual sacrifice can be eaten, thereafter evolving to the stance that one should eat no meat because it hurts animals, with verses describing the noble life as one that lives on flowers, roots and fruits alone. The late Vedic era literature (pre-500 BCE) condemns all killings of men, cattle, birds and horses, and prays to god Agni to punish those who kill. Later texts of Hinduism declare Ahimsa one of the primary virtues, declare any killing or harming any life as against dharma (moral life). Finally, the discussion in Upanishads and Hindu Epics shifts to whether a human being can ever live his or her life without harming animal and plant life in some way; which and when plants or animal meat may be eaten, whether violence against animals causes human beings to become less compassionate, and if and how one may exert least harm to non-human life consistent with ahimsa precept, given the constraints of life and human needs. The Mahabharata permits hunting by warriors, but opposes it in the case of hermits who must be strictly non-violent. Sushruta Samhita, a Hindu text written in the 3rd or 4th century, in Chapter XLVI suggests proper diet as a means of treating certain illnesses, and recommends various fishes and meats for different ailments and for pregnant women, and the Charaka Samhita describes meat as superior to all other kinds of food for convalescents. Across the texts of Hinduism, there is a profusion of ideas about the virtue of Ahimsa when applied to non-human life, but without a universal consensus. Alsdorf claims the debate and disagreements between supporters of vegetarian lifestyle and meat eaters was significant. Even suggested exceptions – ritual slaughter and hunting – were challenged by advocates of Ahimsa. In the Mahabharata both sides present various arguments to substantiate their viewpoints. Moreover, a hunter defends his profession in a long discourse. Many of the arguments proposed in favor of non-violence to animals refer to the bliss one feels, the rewards it entails before or after death, the danger and harm it prevents, as well as to the karmic consequences of violence. The ancient Hindu texts discuss Ahimsa and non-animal life. They discourage wanton destruction of nature including of wild and cultivated plants. Hermits (sannyasins) were urged to live on a fruitarian diet so as to avoid the destruction of plants. Scholars claim the principles of ecological nonviolence is innate in the Hindu tradition, and its conceptual fountain has been Ahimsa as their cardinal virtue. The classical literature of the Indian religions, such as Hinduism and Jainism, exists in many Indian languages. For example, the Tirukkural, written in three volumes, likely between 450 and 500 CE, dedicates verses 251–260 and 321–333 of its first volume to the virtue of Ahimsa, emphasizing on moral vegetarianism and non-killing (kollamai). However, the Tirukkural also glorifies soldiers and their valour during war, and states that it is king's duty to punish criminals and implement "death sentence for the wicked". Modern times In the 19th and 20th centuries, prominent figures of Indian spirituality such as Shrimad Rajchandra and Swami Vivekananda emphasised the importance of Ahimsa. Mohandas Karamchand Gandhi successfully promoted the principle of Ahimsa to all spheres of life, in particular to politics (Swaraj). His non-violent resistance movement satyagraha had an immense impact on India, impressed public opinion in Western countries, and influenced the leaders of various civil and political rights movements such as the American civil rights movement's Martin Luther King Jr. and James Bevel. In Gandhi's thought, Ahimsa precludes not only the act of inflicting a physical injury, but also mental states like evil thoughts and hatred, unkind behavior such as harsh words, dishonesty and lying, all of which he saw as manifestations of violence incompatible with Ahimsa. Gandhi believed Ahimsa to be a creative energy force, encompassing all interactions leading one's self to find satya, "Divine Truth". Sri Aurobindo criticised the Gandhian concept of Ahimsa as unrealistic and not universally applicable; he adopted a pragmatic non-pacifist position, saying that the justification of violence depends on the specific circumstances of the given situation. Gandhi stated his belief that "Ahimsa is in Hinduism, it is in Christianity as well as in Islam." He added, "Nonviolence is common to all religions, but it has found the highest expression and application in Hinduism (I do not regard Jainism or Buddhism as separate from Hinduism)." When questioned whether violence and non-violence is both taught in Quran, he stated, "I have heard it from many Muslim friends that the Koran teaches the use of non-violence. (... The) argument about non-violence in the Holy Koran is an interpolation, not necessary for my thesis." A historical and philosophical study of Ahimsa was instrumental in the shaping of Albert Schweitzer's principle of "reverence for life". Schweitzer praised Indian philosophical and religious traditions for the ethics of Ahimsa: "the laying down of the commandment not to kill and not to damage is one of the greatest events in the spiritual history of humankind", but suggested that "not-killing and not-harming" is not always practically possible as in self-defence, nor ethical as in chronic starving during a famine case. Yoga Ahimsa is imperative for practitioners of Patañjali's eight limb Raja yoga system. It is included in the first limb and is the first of five Yamas (self restraints) which, together with the second limb, make up the code of ethical conduct in Yoga philosophy. Ahimsa is also one of the ten Yamas in Hatha Yoga according to verse 1.1.17 of its classic manual Hatha Yoga Pradipika. The significance of Ahimsa as the first restraint in the first limb of Yoga (Yamas), is that it defines the necessary foundation for progress through Yoga. It is a precursor to Asana, implying that success in Yogasana can be had only if the self is purified in thought, word, and deed through the self-restraint of Ahimsa. Jainism In Jainism, the understanding and implementation of Ahimsā is more radical, scrupulous, and comprehensive than in any other religion. Killing any living being out of passions is considered hiṃsā (to injure) and abstaining from such an act is ahimsā (noninjury). The vow of ahimsā is considered the foremost among the 'five vows of Jainism'. Other vows like truth (satya) are meant for safeguarding the vow of ahimsā. In the practice of Ahimsa, the requirements are less strict for the lay persons (sravakas) who have undertaken anuvrata (Smaller Vows) than for the Jain monastics who are bound by the Mahavrata "Great Vows". The statement (or, "Non-injury/nonviolence/harmlessness is the supreme/ultimate/paramount/highest/absolute duty/virtue/attribute/religion" — slashes are used here to present alternative denotations) is often found inscribed on the walls of the Jain temples. Like in Hinduism, the aim is to prevent the accumulation of harmful karma. When Mahavira revived and reorganised the Jain faith in the 6th or 5th century BCE, Ahimsa was already an established, strictly observed rule. Rishabhanatha (Ādinātha), the first Jain Tirthankara, whom modern Western historians consider to be a historical figure, followed by Parshvanatha (Pārśvanātha) the twenty-third Tirthankara lived in about the 9th century BCE. He founded the community to which Mahavira's parents belonged. Ahimsa was already part of the "Fourfold Restraint" (Caujjama), the vows taken by Parshva's followers. In the times of Mahavira and in the following centuries, Jains were at odds with both Buddhists and followers of the Vedic religion or Hindus, whom they accused of negligence and inconsistency in the implementation of Ahimsa. According to the Jain tradition either lacto vegetarianism or veganism is prescribed. The Jain concept of Ahimsa is characterised by several aspects. Killing of animals for food is absolutely ruled out. Jains also make considerable efforts not to injure plants in everyday life as far as possible. Though they admit that plants must be destroyed for the sake of food, they accept such violence only inasmuch as it is indispensable for human survival, and there are special instructions for preventing unnecessary violence against plants. Jain monks and nuns go out of their way so as not to hurt even small insects and other minuscule animals. Both the renouncers and the laypeople of Jain faith reject meat, fish, alcohol and honey as these are believed to harm large or minuscule life forms. Jaina scholars have debated the potential injury to other life forms during one's occupation. Certain Jain texts, states Padmannabh Jaini – a Jainism scholar, forbid people of its faith from husbandry, agriculture and trade in animal-derived products. Some Jains abstain from farming because it inevitably entails unintentional killing or injuring of many small animals, such as worms and insects, These teachings, in part, have led the Jain community to focus on trade, merchant, clerical and administrative occupations to minimize arambhaja-himsa (occupational violence against all life forms). For the layperson, the teaching has been of ahimsa with pramada – that is, reducing violence through proper intention and being careful in every action on a daily basis to minimize violence to all life forms. The Jain texts, unlike most Hindu and Buddhist texts on just war, have been inconsistent. For its monastic community – sadhu and sadhvi – the historically accepted practice has been to "willingly sacrifice one's own life" to the attacker, to not retaliate, so that the mendicant may keep the First Great Vow of "total nonviolence". Jain literature of the 10th century CE, for example, describes a king ready for war and being given lessons about non-violence by the Jain acharya (spiritual teacher). In the 12th century CE and thereafter, in an era of violent raids, destruction of temples, the slaughter of agrarian communities and ascetics by Islamic armies, Jain scholars reconsidered the First Great Vow of mendicants and its parallel for the laypeople. The medieval texts of this era, such as by Jinadatta Suri, recommended both the mendicants and the laypeople to fight and kill if that would prevent greater and continued violence on humans and other life forms (virodhi-himsa). Such exemptions to ahimsa is a relatively rare teaching in Jain texts, states Dundas. Mahatma Gandhi stated, "No religion in the World has explained the principle of Ahiṃsā so deeply and systematically as is discussed with its applicability in every human life in Jainism. As and when the benevolent principle of Ahiṃsā or non-violence will be ascribed for practice by the people of the world to achieve their end of life in this world and beyond, Jainism is sure to have the uppermost status and Mahāvīra is sure to be respected as the greatest authority on Ahiṃsā". Buddhism In Buddhist texts Ahimsa (or its Pāli cognate ) is part of the Five Precepts (), the first of which has been to abstain from killing. This precept of Ahimsa is applicable to both the Buddhist layperson and the monk community. The Ahimsa precept is not a commandment and transgressions did not invite religious sanctions for laypersons, but their power has been in the Buddhist belief in karmic consequences and their impact in afterlife during rebirth. Killing, in Buddhist belief, could lead to rebirth in the hellish realm, and for a longer time in more severe conditions if the murder victim was a monk. Saving animals from slaughter for meat is believed to be a way to acquire merit for better rebirth. These moral precepts have been voluntarily self-enforced in lay Buddhist culture through the associated belief in karma and rebirth. The Buddhist texts not only recommended Ahimsa, but suggest avoiding trading goods that contribute to or are a result of violence: Unlike lay Buddhists, transgressions by monks do invite sanctions. Full expulsion of a monk from sangha follows instances of killing, just like any other serious offense against the monastic nikaya code of conduct. War Violent ways of punishing criminals and prisoners of war was not explicitly condemned in Buddhism, but peaceful ways of conflict resolution and punishment with the least amount of injury were encouraged. The early texts condemn the mental states that lead to violent behavior. Nonviolence is an overriding theme within the Pāli Canon. While the early texts condemn killing in the strongest terms, and portray the ideal queen/king as a pacifist, such a queen/king is nonetheless flanked by an army. It seems that the Buddha's teaching on nonviolence was not interpreted or put into practice in an uncompromisingly pacifist or anti-military-service way by early Buddhists. The early texts assume war to be a fact of life, and well-skilled warriors are viewed as necessary for defensive warfare. In Pali texts, injunctions to abstain from violence and involvement with military affairs are directed at members of the sangha; later Mahayana texts, which often generalise monastic norms to laity, require this of lay people as well. The early texts do not contain just-war ideology as such. Some argue that a sutta in the Gamani Samyuttam rules out all military service. In this passage, a soldier asks the Buddha if it is true that, as she/he has been told, soldiers slain in battle are reborn in a heavenly realm. The Buddha reluctantly replies that if she/he is killed in battle while her/his mind is seized with the intention to kill, she/he will undergo an unpleasant rebirth. In the early texts, a person's mental state at the time of death is generally viewed as having a great impact on the next birth. Some Buddhists point to other early texts as justifying defensive war. One example is the Kosala Samyutta, in which King Pasenadi, a righteous king favored by the Buddha, learns of an impending attack on his kingdom. He arms himself in defence, and leads his army into battle to protect his kingdom from attack. He lost this battle but won the war. King Pasenadi eventually defeated King Ajatasattu and captured him alive. He thought that, although this King of Magadha has transgressed against his kingdom, he had not transgressed against him personally, and Ajatasattu was still his nephew. He released Ajatasattu and did not harm him. Upon his return, the Buddha said (among other things) that Pasenadi "is a friend of virtue, acquainted with virtue, intimate with virtue", while the opposite is said of the aggressor, King Ajatasattu. According to Theravada commentaries, there are five requisite factors that must all be fulfilled for an act to be both an act of killing and to be karmically negative. These are: (1) the presence of a living being, human or animal; (2) the knowledge that the being is a living being; (3) the intent to kill; (4) the act of killing by some means; and (5) the resulting death. Some Buddhists have argued on this basis that the act of killing is complicated, and its ethicization is predicated upon intent. Some have argued that in defensive postures, for example, the primary intention of a soldier is not to kill, but to defend against aggression, and the act of killing in that situation would have minimal negative karmic repercussions. According to Dr. Babasaheb Ambedkar, there is circumstantial evidence encouraging Ahimsa, from the Buddha's doctrine, "Love all, so that you may not wish to kill any." Gautama Buddha distinguished between a principle and a rule. He did not make Ahimsa a matter of rule, but suggested it as a matter of principle. This gives Buddhists freedom to act. Laws The emperors of the Sui dynasty, Tang dynasty, and early Song dynasty banned killing in the Lunar calendar's 1st, 5th, and 9th months. Empress Wu Tse-Tien banned killing for more than half a year in 692. Some rulers banned fishing for a period of time each year. There were also bans after the death of emperors, after Buddhist and Taoist prayers, and after natural disasters such as Shanghai's 1926 summer drought, as well as an 8-day ban beginning August 12, 1959, after the August 7 flood (八七水災), the last big flood before the 88 Taiwan Flood. People avoid killing during some festivals, like the Taoist Ghost Festival, the Nine Emperor Gods Festival, and the Vegetarian Festival, as well as during others. See also Anekantavada Animal rights Consistent life ethic Ethics Golden Rule Nonkilling Nonviolence Nonresistance Pacifism Yamas Karuṇā Civil resistance Gandhism Satyagraha Veganism Vegetarianism and religion History of vegetarianism References Citations Sources Jindal, K.B.: An epitome of Jainism, New Delhi 1988 Laidlaw, James: Riches and Renunciation. Religion, economy, and society among the Jains, Oxford 1995 Lamotte, Etienne: History of Indian Buddhism from the Origins to the Śaka Era, Louvain-la-Neuve 1988 Mohandas Karamchand Gandhi: Manas: History and Politics, 2 October 1869 – 30 January 1948) Sarao, K.T.S.: The Origin and Nature of Ancient Indian Buddhism, Delhi 1989 Schmidt, Hanns Peter: The Origin of Ahimsa, in: Mélanges d'Indianisme à la mémoire de Louis Renou, Paris 1968 Tähtinen, Unto: Ahimsa. Non-Violence in Indian Tradition, London 1976 External links Concepts in ethics Hindu philosophical concepts Hindu ethics Jain philosophical concepts Jain ethics Buddhist ethics Pacifism Sanskrit words and phrases Wholesome factors in Buddhism

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Annals of Mathematics

The Annals of Mathematics is a mathematical journal published every two months by Princeton University and the Institute for Advanced Study. History The journal was established as The Analyst in 1874 and with Joel E. Hendricks as the founding editor-in-chief. It was "intended to afford a medium for the presentation and analysis of any and all questions of interest or importance in pure and applied Mathematics, embracing especially all new and interesting discoveries in theoretical and practical astronomy, mechanical philosophy, and engineering". It was published in Des Moines, Iowa, and was the earliest American mathematics journal to be published continuously for more than a year or two. This incarnation of the journal ceased publication after its tenth year, in 1883, giving as an explanation Hendricks' declining health, but Hendricks made arrangements to have it taken over by new management, and it was continued from March 1884 as the Annals of Mathematics. The new incarnation of the journal was edited by Ormond Stone (University of Virginia). It moved to Harvard in 1899 before reaching its current home in Princeton in 1911. An important period for the journal was 1928–1958 with Solomon Lefschetz as editor. During this time, it became an increasingly well-known and respected journal. Its rise, in turn, stimulated American mathematics. Norman Steenrod characterized Lefschetz' impact as editor as follows: "The importance to American mathematicians of a first-class journal is that it sets high standards for them to aim at. In this somewhat indirect manner, Lefschetz profoundly affected the development of mathematics in the United States." Princeton University continued to publish the Annals on its own until 1933, when the Institute for Advanced Study took joint editorial control. Since 1998 it has been available in an electronic edition, alongside its regular print edition. The electronic edition was available without charge, as an open access journal, but since 2008 this is no longer the case. Issues from before 2003 were transferred to the non-free JSTOR archive, and articles are not freely available until 5 years after publication. Editors The current editors of the Annals of Mathematics are Nick Katz, Sergiu Klainerman, Fernando Codá Marques, Assaf Naor, Peter Sarnak and Zoltán Szabó (all from Princeton University, with Peter Sarnak being also a Professor at the Institute for Advanced Study). Abstracting and indexing The journal is abstracted and indexed in the Science Citation Index, Current Contents/Physical, Chemical & Earth Sciences, and Scopus. According to the Journal Citation Reports, the journal has a 2020 impact factor of 5.246, ranking it third out of 330 journals in the category "Mathematics". References External links Mathematics journals Publications established in 1874 English-language journals Bimonthly journals Princeton University publications Academic journals published by universities and colleges of the United States 1874 establishments in Iowa

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https://en.wikipedia.org/wiki/Andrei%20Sakharov

Andrei Sakharov

Andrei Dmitrievich Sakharov (; 21 May 192114 December 1989) was a Soviet nuclear physicist, dissident, Nobel laureate, and activist for disarmament, peace and human rights. He became renowned as the designer of the Soviet Union's RDS-37, a codename for Soviet development of thermonuclear weapons. Sakharov later became an advocate of civil liberties and civil reforms in the Soviet Union, for which he faced state persecution; these efforts earned him the Nobel Peace Prize in 1975. The Sakharov Prize, which is awarded annually by the European Parliament for people and organizations dedicated to human rights and freedoms, is named in his honor. Biography Early life Sakharov was born in Moscow on May 21, 1921. His father was Dmitri Ivanovich Sakharov, a physics professor and an amateur pianist. His father taught at the Second Moscow State University. Andrei's grandfather Ivan had been a prominent lawyer in the Russian Empire who had displayed respect for social awareness and humanitarian principles (including advocating the abolition of capital punishment) that would later influence his grandson. Sakharov's mother was Yekaterina Alekseevna Sofiano, a daughter of the army general Aleksey Semenovich Sofiano. Sakharov's parents and paternal grandmother, Maria Petrovna, largely shaped his personality. His mother and grandmother were churchgoers; his father was a nonbeliever. When Andrei was about thirteen, he realized that he did not believe. However, despite being an atheist, he did believe in a "guiding principle" that transcends the physical laws. Education and career Sakharov entered Physics Department of Moscow State University in 1938. Following evacuation in 1941 during the Great Patriotic War (World War II), he graduated in Aşgabat, in today's Turkmenistan. He was then assigned to laboratory work in Ulyanovsk. In 1943, he married Klavdia Alekseyevna Vikhireva, with whom he raised two daughters and a son. Klavdia would later die in 1969. He returned to Moscow in 1945 to study at the Theoretical Department of FIAN (the Physical Institute of the Soviet Academy of Sciences). He received his Ph.D. in 1947. Development of thermonuclear devices After World War II, he researched cosmic rays. In mid-1948 he participated in the Soviet atomic bomb project under Igor Kurchatov and Igor Tamm. Sakharov's study group at FIAN in 1948 came up with a second concept in August–September 1948. Adding a shell of natural, unenriched uranium around the deuterium would increase the deuterium concentration at the uranium-deuterium boundary and the overall yield of the device, because the natural uranium would capture neutrons and itself fission as part of the thermonuclear reaction. This idea of a layered fission-fusion-fission bomb led Sakharov to call it the sloika, or layered cake. The first Soviet atomic device was tested on August 29, 1949. After moving to Sarov in 1950, Sakharov played a key role in the development of the first megaton-range Soviet hydrogen bomb using a design known as Sakharov's Third Idea in Russia and the Teller–Ulam design in the United States. Before his Third Idea, Sakharov tried a "layer cake" of alternating layers of fission and fusion fuel. The results were disappointing, yielding no more than a typical fission bomb. However the design was seen to be worth pursuing because deuterium is abundant and uranium is scarce, and he had no idea how powerful the US design was. Sakharov realised that in order to cause the explosion of one side of the fuel to symmetrically compress the fusion fuel, a mirror could be used to reflect the radiation. The details had not been officially declassified in Russia when Sakharov was writing his memoirs, but in the Teller–Ulam design, soft X-rays emitted by the fission bomb were focused onto a cylinder of lithium deuteride to compress it symmetrically. This is called radiation implosion. The Teller–Ulam design also had a secondary fission device inside the fusion cylinder to assist with the compression of the fusion fuel and generate neutrons to convert some of the lithium to tritium, producing a mixture of deuterium and tritium. Sakharov's idea was first tested as RDS-37 in 1955. A larger variation of the same design which Sakharov worked on was the 50 Mt Tsar Bomba of October 1961, which was the most powerful nuclear device ever detonated. Sakharov saw "striking parallels" between his fate and those of J. Robert Oppenheimer and Edward Teller in the US. Sakharov believed that in this "tragic confrontation of two outstanding people", both deserved respect, because "each of them was certain he had right on his side and was morally obligated to go to the end in the name of truth." While Sakharov strongly disagreed with Teller over nuclear testing in the atmosphere and the Strategic Defense Initiative, he believed that American academics had been unfair to Teller's resolve to get the H-bomb for the United States since "all steps by the Americans of a temporary or permanent rejection of developing thermonuclear weapons would have been seen either as a clever feint, or as the manifestation of stupidity. In both cases, the reaction would have been the same – avoid the trap and immediately take advantage of the enemy's stupidity." Sakharov never felt that by creating nuclear weapons he had "known sin", in Oppenheimer's expression. He later wrote: Support for peaceful use of nuclear technology In 1950 he proposed an idea for a controlled nuclear fusion reactor, the tokamak, which is still the basis for the majority of work in the area. Sakharov, in association with Tamm, proposed confining extremely hot ionized plasma by torus shaped magnetic fields for controlling thermonuclear fusion that led to the development of the tokamak device. Magneto-implosive generators In 1951 he invented and tested the first explosively pumped flux compression generators, compressing magnetic fields by explosives. He called these devices MK (for MagnetoKumulative) generators. The radial MK-1 produced a pulsed magnetic field of 25 megagauss (2500 teslas). The resulting helical MK-2 generated 1000 million amperes in 1953. Sakharov then tested a MK-driven "plasma cannon" where a small aluminum ring was vaporized by huge eddy currents into a stable, self-confined toroidal plasmoid and was accelerated to 100 km/s. Sakharov later suggested replacing the copper coil in MK generators with a large superconductor solenoid to magnetically compress and focus underground nuclear explosions into a shaped charge effect. He theorized this could focus 1023 protons per second on a 1 mm2 surface. Particle physics and cosmology After 1965 Sakharov returned to fundamental science and began working on particle physics and physical cosmology. He tried to explain the baryon asymmetry of the universe; in that regard, he was the first to give a theoretical motivation for proton decay. Proton decay was suggested by Wigner in 1949 and 1952. Proton decay experiments had been performed since 1954 already. Sakharov was the first to consider CPT-symmetric events occurring before the Big Bang:We can visualize that neutral spinless maximons (or photons) are produced at ''t'' < 0 from contracting matter having an excess of antiquarks, that they pass "one through the other" at the instant ''t'' = 0 when the density is infinite, and decay with an excess of quarks when ''t'' > 0, realizing total CPT symmetry of the universe. All the phenomena at t < 0 are assumed in this hypothesis to be CPT reflections of the phenomena at t > 0. His legacy in this domain are the famous conditions named after him: Baryon number violation, C-symmetry and CP-symmetry violation, and interactions out of thermal equilibrium. Sakharov was also interested in explaining why the curvature of the universe is so small. This lead him to consider cyclic models, where the universe oscillates between contraction and expansion phases. In those models, after a certain number of cycles the curvature naturally becomes infinite even if it had not started this way: Sakharov considered three starting points, a flat universe with a slightly negative cosmological constant, a universe with a positive curvature and a zero cosmological constant, and a universe with a negative curvature and a slightly negative cosmological constant. Those last two models feature what Sakharov calls a reversal of the time arrow, which can be summarized as follows: He considers times t > 0 after the initial Big Bang singularity at t = 0 (which he calls "Friedman singularity" and denotes Φ) as well as times t < 0 before that singularity. He then assumes that entropy increases when time increases for t > 0 as well as when time decreases for t < 0, which constitutes his reversal of time. Then he considers the case when the universe at t < 0 is the image of the universe at t > 0 under CPT symmetry but also the case when it is not so: the universe has a non-zero CPT charge at t = 0 in this case. Sakharov considers a variant of this model where the reversal of the time arrow occurs at a point of maximum entropy instead of happening at the singularity. In those models there is no dynamic interaction between the universe at t < 0 and t > 0. In his first model the two universes did not interact, except via local matter accumulation whose density and pressure become high enough to connect the two sheets through a bridge without spacetime between them, but with a continuity of geodesics beyond the Schwarzschild radius with no singularity, allowing an exchange of matter between the two conjugated sheets, based on an idea after Igor Dmitriyevich Novikov. Novikov called such singularities a collapse and an anticollapse, which are an alternative to the couple black hole and white hole in the wormhole model. Sakharov also proposed the idea of induced gravity as an alternative theory of quantum gravity. Turn to activism Since the late 1950s Sakharov had become concerned about the moral and political implications of his work. Politically active during the 1960s, Sakharov was against nuclear proliferation. Pushing for the end of atmospheric tests, he played a role in the 1963 Partial Test Ban Treaty, signed in Moscow. Sakharov was also involved in an event with political consequences in 1964, when the Soviet Academy of Sciences nominated for full membership Nikolai Nuzhdin, a follower of Trofim Lysenko (initiator of the Stalin-supported anti-genetics campaign Lysenkoism). Contrary to normal practice, Sakharov, a member of the academy, publicly spoke out against full membership for Nuzhdin and held him responsible for "the defamation, firing, arrest, even death, of many genuine scientists." In the end, Nuzhdin was not elected, but the episode prompted Sergei Khrushchev to order the KGB to gather compromising material on Sakharov. The major turn in Sakharov's political evolution came in 1967, when anti-ballistic missile defense became a key issue in US–Soviet relations. In a secret detailed letter to the Soviet leadership of July 21, 1967, Sakharov explained the need to "take the Americans at their word" and accept their proposal for a "bilateral rejection by the USA and the Soviet Union of the development of antiballistic missile defense" because an arms race in the new technology would otherwise increase the likelihood of nuclear war. He also asked permission to publish his manuscript, which accompanied the letter, in a newspaper to explain the dangers posed by that kind of defense. The government ignored his letter and refused to let him initiate a public discussion of ABMs in the Soviet press. Since 1967, after the Six Day War and the beginning of the Arab-Israeli conflict, he actively supported Israel, as he reported more than once in the press, and also maintained friendly relations with refuseniks who later made aliyah. In May 1968, Sakharov completed an essay, "Reflections on Progress, Peaceful Coexistence, and Intellectual Freedom". He described the anti-ballistic missile defense as a major threat of world nuclear war. After the essay was circulated in samizdat and then published outside the Soviet Union, Sakharov was banned from conducting any military-related research and returned to FIAN to study fundamental theoretical physics. For 12 years, until his exile to Gorky (Nizhny Novgorod) in January 1980, Sakharov assumed the role of a widely recognized and open dissident in Moscow. He stood vigil outside closed courtrooms, wrote appeals on behalf of more than 200 individual prisoners, and continued to write essays about the need for democratization. In 1970, Sakharov was among the three founding members of the Committee on Human Rights in the USSR, along with Valery Chalidze and Andrei Tverdokhlebov. The Committee wrote appeals, collected signatures for petitions and succeeded in affiliating with several international human rights organizations. Its work was the subject of many KGB reports and brought Sakharov under increasing pressure from the government. Sakharov married a fellow human rights activist, Yelena Bonner, in 1972. By 1973, Sakharov was meeting regularly with Western correspondents and holding press conferences in his apartment. He appealed to the US Congress to approve the 1974 Jackson-Vanik Amendment to a trade bill, which coupled trade tariffs to the Kremlin's willingness to allow freer emigration. Attacked by Soviet establishment from 1972 In 1972, Sakharov became the target of sustained pressure from his fellow scientists in the Soviet Academy of Sciences and the Soviet press. The writer Aleksandr Solzhenitsyn came to his defence. In 1973 and 1974, the Soviet media campaign continued, targeting both Sakharov and Solzhenitsyn for their pro-Western, anti-socialist positions. Sakharov later described that it took "years" for him to "understand how much substitution, deceit, and lack of correspondence with reality there was" in the Soviet ideals. "At first I thought, despite everything that I saw with my own eyes, that the Soviet State was a breakthrough into the future, a kind of prototype for all countries". Then he came, in his words, to "the theory of symmetry: all governments and regimes to a first approximation are bad, all peoples are oppressed, and all are threatened by common dangers." Sakharov's ideas on social development led him to put forward the principle of human rights as a new basis of all politics. In his works, he declared that "the principle 'what is not prohibited is allowed' should be understood literally", and defied what he saw as unwritten ideological rules imposed by the Communist Party on the society in spite of a democratic Soviet Constitution (1936). In a letter written from exile, he cheered up a fellow physicist and free market advocate with the words: "Fortunately, the future is unpredictable and also – because of quantum effects – uncertain." For Sakharov, the indeterminacy of the future supported his belief that he could and should take personal responsibility for it. Nobel Peace Prize (1975) In 1973, Sakharov was nominated for the Nobel Peace Prize, and in 1974, he was awarded the Prix mondial Cino Del Duca. Sakharov was awarded the Nobel Peace Prize in 1975. The Norwegian Nobel Committee called him "a spokesman for the conscience of mankind". In the words of the Nobel Committee's citation: "In a convincing manner Sakharov has emphasised that Man's inviolable rights provide the only safe foundation for genuine and enduring international cooperation." Sakharov was not allowed to leave the Soviet Union to collect the prize. His wife, Yelena Bonner, read his speech at the ceremony in Oslo, Norway. On the day the prize was awarded, Sakharov was in Vilnius, where the human rights activist Sergei Kovalev was being tried. In his Nobel lecture, "Peace, Progress, Human Rights", Sakharov called for an end to the arms race, greater respect for the environment, international cooperation, and universal respect for human rights. He included a list of prisoners of conscience and political prisoners in the Soviet Union and stated that he shared the prize with them. By 1976, the head of the KGB, Yuri Andropov, was prepared to call Sakharov "Domestic Enemy Number One" before a group of KGB officers. Internal exile (1980–1986) Sakharov was arrested on 22 January 1980, following his public protests against the Soviet intervention in Afghanistan in 1979, and was sent to the city of Gorky, now Nizhny Novgorod, a city that was off limits to foreigners. Between 1980 and 1986, Sakharov was kept under Soviet police surveillance. In his memoirs, he mentioned that their apartment in Gorky was repeatedly subjected to searches and heists. Sakharov was named the 1980 Humanist of the Year by the American Humanist Association. In May 1984, Sakharov's wife, Yelena Bonner, was detained, and Sakharov began a hunger strike, demanding permission for his wife to travel to the United States for heart surgery. He was forcibly hospitalized and force-fed. He was held in isolation for four months. In August 1984, Bonner was sentenced by a court to five years of exile in Gorky. In April 1985, Sakharov started a new hunger strike for his wife to travel abroad for medical treatment. He again was taken to a hospital and force-fed. In August, the Politburo discussed what to do about Sakharov. He remained in the hospital until October 1985, when his wife was allowed to travel to the United States. She had heart surgery in the United States and returned to Gorky in June 1986. In December 1985, the European Parliament established the Sakharov Prize for Freedom of Thought, to be given annually for outstanding contributions to human rights. On 19 December 1986, Mikhail Gorbachev, who had initiated the policies of perestroika and glasnost, called Sakharov to tell him that he and his wife could return to Moscow. Political leader In 1988, Sakharov was given the International Humanist Award by the International Humanist and Ethical Union. He helped to initiate the first independent legal political organizations and became prominent in the Soviet Union's growing political opposition. In March 1989, Sakharov was elected to the new parliament, the All-Union Congress of People's Deputies and co-led the democratic opposition, the Inter-Regional Deputies Group. In November the head of the KGB reported to Gorbachev on Sakharov's encouragement and support for the coal miners' strike in Vorkuta. In December 1988, Sakharov visited Armenia and Azerbaijan on a fact-finding mission. He concluded, "For Azerbaijan the issue of Karabakh is a matter of ambition, for the Armenians of Karabakh, it is a matter of life and death". Death Soon after 9pm on 14 December 1989, Sakharov went to his study to take a nap before preparing an important speech he was to deliver the next day in the Congress. His wife went to wake him at 11pm as he had requested but she found Sakharov dead on the floor. According to the notes of Yakov Rapoport, a senior pathologist present at the autopsy, it is most likely that Sakharov died of an arrhythmia consequent to dilated cardiomyopathy at the age of 68. He was interred in the Vostryakovskoye Cemetery in Moscow. Influence Memorial prizes The Sakharov Prize for Freedom of Thought was established in 1988 by the European Parliament in his honour, and is the highest tribute to human rights endeavours awarded by the European Union. It is awarded annually by the parliament to "those who carry the spirit of Soviet dissident Andrei Sakharov"; to "Laureates who, like Sakharov, dedicate their lives to peaceful struggle for human rights." An Andrei Sakharov prize has also been awarded by the American Physical Society every second year since 2006 "to recognize outstanding leadership and/or achievements of scientists in upholding human rights". The Andrei Sakharov Prize For Writer's Civic Courage was established in October 1990. In 2004, with the approval of Yelena Bonner, an annual Sakharov Prize for journalism was established for reporters and commentators in Russia. Funded by former Soviet dissident Pyotr Vins, now a businessman in the US, the prize is administered by the Glasnost Defence Foundation in Moscow. The prize "for journalism as an act of conscience" has been won over the years by famous journalists such as Anna Politkovskaya and young reporters and editors working far from Russia's media capital, Moscow. The 2015 winner was Yelena Kostyuchenko. Andrei Sakharov Archives and Human Rights Center The Andrei Sakharov Archives and Human Rights Center, established at Brandeis University in 1993, are now housed at Harvard University. The documents from that archive were published by the Yale University Press in 2005. These documents are available online. Most of documents of the archive are letters from the head of the KGB to the Central Committee about activities of Soviet dissidents and recommendations about the interpretation in newspapers. The letters cover the period from 1968 to 1991 (Brezhnev stagnation). The documents characterize not only Sakharov's activity, but that of other dissidents, as well as that of highest-position apparatchiks and the KGB. No Russian equivalent of the KGB archive is available. Legacy and remembrance Places In Moscow, there is Academician Sakharov Avenue and Sakharov Center. During the 1980s, the block of 16th Street NW between L and M streets, in front of the Russian ambassador's residence in Washington, D.C. was renamed "Andrei Sakharov Plaza" as a form of protest against his 1980 arrest and detention. In Yerevan, the capital of Armenia, Sakharov Square, located in the heart of the city, is named after him. The Sakharov Gardens (est. 1990) are located at the entrance to Jerusalem, Israel, off the Jerusalem–Tel Aviv Highway. There is also a street named after him in Haifa. In Nizhny Novgorod, there is a Sakharov Museum in the apartment on the first floor of the 12-storeyed house where the Sakharov family lived for seven years; in 2014 his monument was erected near the house. In Saint Petersburg, his monument stands in Sakharov Square, and there is a Sakharov Park. In 1979, an asteroid, 1979 Sakharov, was named after him. A public square in Vilnius in front of the Press House is named after Sakharov. The square was named on 16 March 1991, as the Press House was still occupied by the Soviet Army. Andreja Saharova iela in the district of Pļavnieki in Riga, Latvia, is named after Sakharov. Andreij-Sacharow-Platz in downtown Nuremberg is named in honour of Sakharov. In Belarus, International Sakharov Environmental University was named after him. Intersection of Ventura Blvd and Laurel Canyon Blvd in Studio City, Los Angeles, is named Andrei Sakharov Square. In Arnhem, the bridge over the Nederrijn is called the Andrej Sacharovbrug. The Andrej Sacharovweg is a street in Assen, Netherlands. There are also streets named in his honour in other places in the Netherlands such as Amsterdam, Amstelveen, The Hague, Hellevoetsluis, Leiden, Purmerend, Rotterdam, Utrecht A street in Copenhagen, Denmark. Quai Andreï Sakharov in Tournai, Belgium, is named in honour of Sakharov. In Poland, streets named in his honour in Warsaw, Łódź and Kraków. Andreï Sakharov Boulevard in the district of Mladost in Sofia, Bulgaria, is named after him. In New York, a street sign at the southwest corner of Third Avenue and 67th Street reads Sakharov-Bonner Corner, in honor of Sakharov and his wife, Yelena Bonner. The corner is just down the block from the Russian (then Soviet) Mission to the United Nations and was the scene of repeated anti-Soviet demonstrations. Media In the 1984 made-for-TV film Sakharov starring Jason Robards. In the television series Star Trek: The Next Generation, one of the Enterprise-D's Shuttlecraft is named after Sakharov, and is featured prominently in several episodes. This follows the Star Trek tradition of naming Shuttlecraft after prominent scientists, and particularly in The Next Generation, physicists. The fictitious interplanetary spacecraft Cosmonaut Alexei Leonov from the novel 2010: Odyssey Two by Arthur C. Clarke is powered by a "Sakharov drive". The novel was published in 1982, when Sakharov was in exile in Nizhny Novgorod, and was dedicated both to Sakharov and to Alexei Leonov. Russian singer Alexander Gradsky wrote and performed the song "Памяти А. Д. Сахарова" ("In memory of Andrei Sakharov"), which features on his Live In "Russia" 2 (Живем в "России" 2) CD. The faction leader of the Ecologists in the PC game S.T.A.L.K.E.R.: Shadow of Chernobyl and its prequel is a scientist named Professor Sakharov. Honours and awards Hero of Socialist Labour (three times: 12 August 1953; 20 June 1956; 7 March 1962). Four Orders of Lenin. Lenin Prize (1956). Stalin Prize (1953). In 1980, Sakharov was stripped of all Soviet awards for "anti-Soviet activities". Later, during glasnost, he declined the return of his awards and, consequently, Mikhail Gorbachev did not sign the necessary decree. Prix mondial Cino Del Duca (1974). Nobel Peace Prize (1975). Laurea Honoris Causa of the Sapienza University of Rome (1980). Grand Cross of Order of the Cross of Vytis (posthumously on January 8, 2003). Bibliography Books Articles and interviews See also Sakharov conditions Sakharov Prize List of peace activists Sergei Kovalev Natan Sharansky Edward Teller Stanislaw Ulam Omid Kokabee, Mordechai Vanunu References Further reading The Regesto delle lauree honoris causa dal 1944 al 1985 is a detailed and carefully commented register of all the documents of the official archive of the Sapienza University of Rome pertaining to the honoris causa degrees awarded or not. It includes all the awarding proposals submitted during the considered period, detailed presentations of the work of the candidate, if available, and precise references to related articles published on Italian newspapers and magazines, if the laurea was awarded. External links The Andrei Sakharov Archives at the Houghton Library. Andrei Sakharov: Soviet Physics, Nuclear Weapons, and Human Rights. Web exhibit at the American Institute of Physics. Andrei Sakharov: Photo-chronology Annotated bibliography of Andrei Sakharov from the Alsos Digital Library Videos 1921 births 1989 deaths 20th-century Russian writers Amnesty International prisoners of conscience held by the Soviet Union Full Members of the USSR Academy of Sciences Grand Crosses of the Order of the Cross of Vytis Heroes of Socialist Labour Lenin Prize winners Members of the Congress of People's Deputies of the Soviet Union Moscow State University alumni Nobel Peace Prize laureates Nuclear weapons program of the Soviet Union Perestroika Recipients of the Order of Lenin Hunger strikers Soviet atheists Soviet inventors Soviet memoirists Soviet anti–nuclear weapons activists Soviet dissidents Soviet male writers 20th-century male writers Soviet Nobel laureates Soviet non-fiction writers Soviet nuclear physicists Soviet prisoners and detainees Soviet psychiatric abuse whistleblowers Stalin Prize winners Writers from Moscow Political prisoners Russian people of Greek descent Political party founders 20th-century memoirists Male non-fiction writers World War II refugees

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

Astrobiology

Astrobiology, known as exobiology, is an interdisciplinary scientific field that studies the origins, early evolution, distribution, and future of life in the universe. Astrobiology is the multidisciplinary field that investigates the deterministic conditions and contingent events with which life arises, distributes, and evolves in the universe. It considers the question of whether extraterrestrial life exists, and if it does, how humans can detect it. Astrobiology makes use of molecular biology, biophysics, biochemistry, chemistry, astronomy, physical cosmology, exoplanetology, geology, paleontology, and ichnology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from that on Earth. The origin and early evolution of life is an inseparable part of the discipline of astrobiology. Astrobiology concerns itself with interpretation of existing scientific data, and although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories. This interdisciplinary field encompasses research on the origin of planetary systems, origins of organic compounds in space, rock-water-carbon interactions, abiogenesis on Earth, planetary habitability, research on biosignatures for life detection, and studies on the potential for life to adapt to challenges on Earth and in outer space. Biochemistry may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. According to research published in August 2015, very large galaxies may be more favorable to the creation and development of habitable planets than such smaller galaxies as the Milky Way. Nonetheless, Earth is the only place in the universe humans know to harbor life. Estimates of habitable zones around other stars, sometimes referred to as "Goldilocks zones", along with the discovery of thousands of extrasolar planets and new insights into extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. Current studies on the planet Mars by the Curiosity and Perseverance rovers are searching for evidence of ancient life as well as plains related to ancient rivers or lakes that may have been habitable. The search for evidence of habitability, taphonomy (related to fossils), and organic molecules on the planet Mars is now a primary NASA and ESA objective. Even if extraterrestrial life is never discovered, the interdisciplinary nature of astrobiology, and the cosmic and evolutionary perspectives engendered by it, may still result in a range of benefits here on Earth. Overview The term was first proposed by the Russian (Soviet) astronomer Gavriil Tikhov in 1953. Astrobiology is etymologically derived from the Greek , astron, "constellation, star"; , bios, "life"; and , -logia, study. The synonyms of astrobiology are diverse; however, the synonyms were structured in relation to the most important sciences implied in its development: astronomy and biology. A close synonym is exobiology from the Greek , "external"; Βίος, bios, "life"; and λογία, -logia, study. The term exobiology was coined by molecular biologist and Nobel Prize winner Joshua Lederberg. Exobiology is considered to have a narrow scope limited to search of life external to Earth, whereas subject area of astrobiology is wider and investigates the link between life and the universe, which includes the search for extraterrestrial life, but also includes the study of life on Earth, its origin, evolution and limits. Another term used in the past is xenobiology, ("biology of the foreigners") a word used in 1954 by science fiction writer Robert Heinlein in his work The Star Beast. The term xenobiology is now used in a more specialized sense, to mean "biology based on foreign chemistry", whether of extraterrestrial or terrestrial (possibly synthetic) origin. Since alternate chemistry analogs to some life-processes have been created in the laboratory, xenobiology is now considered as an extant subject. While it is an emerging and developing field, the question of whether life exists elsewhere in the universe is a verifiable hypothesis and thus a valid line of scientific inquiry. Though once considered outside the mainstream of scientific inquiry, astrobiology has become a formalized field of study. Planetary scientist David Grinspoon calls astrobiology a field of natural philosophy, grounding speculation on the unknown, in known scientific theory. NASA's interest in exobiology first began with the development of the U.S. Space Program. In 1959, NASA funded its first exobiology project, and in 1960, NASA founded an Exobiology Program, which is now one of four main elements of NASA's current Astrobiology Program. In 1971, NASA funded the search for extraterrestrial intelligence (SETI) to search radio frequencies of the electromagnetic spectrum for interstellar communications transmitted by extraterrestrial life outside the Solar System. NASA's Viking missions to Mars, launched in 1976, included three biology experiments designed to look for metabolism of present life on Mars. Advancements in the fields of astrobiology, observational astronomy and discovery of large varieties of extremophiles with extraordinary capability to thrive in the harshest environments on Earth, have led to speculation that life may possibly be thriving on many of the extraterrestrial bodies in the universe. A particular focus of current astrobiology research is the search for life on Mars due to this planet's proximity to Earth and geological history. There is a growing body of evidence to suggest that Mars has previously had a considerable amount of water on its surface, water being considered an essential precursor to the development of carbon-based life. Missions specifically designed to search for current life on Mars were the Viking program and Beagle 2 probes. The Viking results were inconclusive, and Beagle 2 failed minutes after landing. A future mission with a strong astrobiology role would have been the Jupiter Icy Moons Orbiter, designed to study the frozen moons of Jupiter—some of which may have liquid water—had it not been cancelled. In late 2008, the Phoenix lander probed the environment for past and present planetary habitability of microbial life on Mars, and researched the history of water there. The European Space Agency's astrobiology roadmap from 2016, identified five main research topics, and specifies several key scientific objectives for each topic. The five research topics are: 1) Origin and evolution of planetary systems; 2) Origins of organic compounds in space; 3) Rock-water-carbon interactions, organic synthesis on Earth, and steps to life; 4) Life and habitability; 5) Biosignatures as facilitating life detection. In November 2011, NASA launched the Mars Science Laboratory mission carrying the Curiosity rover, which landed on Mars at Gale Crater in August 2012. The Curiosity rover is currently probing the environment for past and present planetary habitability of microbial life on Mars. On 9 December 2013, NASA reported that, based on evidence from Curiosity studying Aeolis Palus, Gale Crater contained an ancient freshwater lake which could have been a hospitable environment for microbial life. The European Space Agency is currently collaborating with the Russian Federal Space Agency (Roscosmos) and developing the ExoMars astrobiology rover, which was scheduled to be launched in July 2020, but was postponed to 2022. Meanwhile, NASA launched the Mars 2020 astrobiology rover and sample cacher for a later return to Earth. Methodology Planetary habitability When looking for life on other planets like Earth, some simplifying assumptions are useful to reduce the size of the task of the astrobiologist. One is the informed assumption that the vast majority of life forms in our galaxy are based on carbon chemistries, as are all life forms on Earth. Carbon is well known for the unusually wide variety of molecules that can be formed around it. Carbon is the fourth most abundant element in the universe and the energy required to make or break a bond is at just the appropriate level for building molecules which are not only stable, but also reactive. The fact that carbon atoms bond readily to other carbon atoms allows for the building of extremely long and complex molecules. The presence of liquid water is an assumed requirement, as it is a common molecule and provides an excellent environment for the formation of complicated carbon-based molecules that could eventually lead to the emergence of life. Some researchers posit environments of water-ammonia mixtures as possible solvents for hypothetical types of biochemistry. A third assumption is to focus on planets orbiting Sun-like stars for increased probabilities of planetary habitability. Very large stars have relatively short lifetimes, meaning that life might not have time to emerge on planets orbiting them. Very small stars provide so little heat and warmth that only planets in very close orbits around them would not be frozen solid, and in such close orbits these planets would be tidally "locked" to the star. The long lifetimes of red dwarfs could allow the development of habitable environments on planets with thick atmospheres. This is significant, as red dwarfs are extremely common. (See Habitability of red dwarf systems). Since Earth is the only planet known to harbor life, there is no evident way to know if any of these simplifying assumptions are correct. Communication attempts Research on communication with extraterrestrial intelligence (CETI) focuses on composing and deciphering messages that could theoretically be understood by another technological civilization. Communication attempts by humans have included broadcasting mathematical languages, pictorial systems such as the Arecibo message and computational approaches to detecting and deciphering 'natural' language communication. The SETI program, for example, uses both radio telescopes and optical telescopes to search for deliberate signals from an extraterrestrial intelligence. While some high-profile scientists, such as Carl Sagan, have advocated the transmission of messages, scientist Stephen Hawking warned against it, suggesting that aliens might simply raid Earth for its resources and then move on. Elements of astrobiology Astronomy Most astronomy-related astrobiology research falls into the category of extrasolar planet (exoplanet) detection, the hypothesis being that if life arose on Earth, then it could also arise on other planets with similar characteristics. To that end, a number of instruments designed to detect Earth-sized exoplanets have been considered, most notably NASA's Terrestrial Planet Finder (TPF) and ESA's Darwin programs, both of which have been cancelled. NASA launched the Kepler mission in March 2009, and the French Space Agency launched the COROT space mission in 2006. There are also several less ambitious ground-based efforts underway. The goal of these missions is not only to detect Earth-sized planets but also to directly detect light from the planet so that it may be studied spectroscopically. By examining planetary spectra, it would be possible to determine the basic composition of an extrasolar planet's atmosphere and/or surface. Given this knowledge, it may be possible to assess the likelihood of life being found on that planet. A NASA research group, the Virtual Planet Laboratory, is using computer modeling to generate a wide variety of virtual planets to see what they would look like if viewed by TPF or Darwin. It is hoped that once these missions come online, their spectra can be cross-checked with these virtual planetary spectra for features that might indicate the presence of life. An estimate for the number of planets with intelligent communicative extraterrestrial life can be gleaned from the Drake equation, essentially an equation expressing the probability of intelligent life as the product of factors such as the fraction of planets that might be habitable and the fraction of planets on which life might arise: where: N = The number of communicative civilizations R* = The rate of formation of suitable stars (stars such as our Sun) fp = The fraction of those stars with planets (current evidence indicates that planetary systems may be common for stars like the Sun) ne = The number of Earth-sized worlds per planetary system fl = The fraction of those Earth-sized planets where life actually develops fi = The fraction of life sites where intelligence develops fc = The fraction of communicative planets (those on which electromagnetic communications technology develops) L = The "lifetime" of communicating civilizations However, whilst the rationale behind the equation is sound, it is unlikely that the equation will be constrained to reasonable limits of error any time soon. The problem with the formula is that it is not used to generate or support hypotheses because it contains factors that can never be verified. The first term, R*, number of stars, is generally constrained within a few orders of magnitude. The second and third terms, fp, stars with planets and fe, planets with habitable conditions, are being evaluated for the star's neighborhood. Drake originally formulated the equation merely as an agenda for discussion at the Green Bank conference, but some applications of the formula had been taken literally and related to simplistic or pseudoscientific arguments. Another associated topic is the Fermi paradox, which suggests that if intelligent life is common in the universe, then there should be obvious signs of it. Another active research area in astrobiology is planetary system formation. It has been suggested that the peculiarities of the Solar System (for example, the presence of Jupiter as a protective shield) may have greatly increased the probability of intelligent life arising on our planet. Biology Biology cannot state that a process or phenomenon, by being mathematically possible, has to exist forcibly in an extraterrestrial body. Biologists specify what is speculative and what is not. The discovery of extremophiles, organisms able to survive in extreme environments, became a core research element for astrobiologists, as they are important to understand four areas in the limits of life in planetary context: the potential for panspermia, forward contamination due to human exploration ventures, planetary colonization by humans, and the exploration of extinct and extant extraterrestrial life. Until the 1970s, life was thought to be entirely dependent on energy from the Sun. Plants on Earth's surface capture energy from sunlight to photosynthesize sugars from carbon dioxide and water, releasing oxygen in the process that is then consumed by oxygen-respiring organisms, passing their energy up the food chain. Even life in the ocean depths, where sunlight cannot reach, was thought to obtain its nourishment either from consuming organic detritus rained down from the surface waters or from eating animals that did. The world's ability to support life was thought to depend on its access to sunlight. However, in 1977, during an exploratory dive to the Galapagos Rift in the deep-sea exploration submersible Alvin, scientists discovered colonies of giant tube worms, clams, crustaceans, mussels, and other assorted creatures clustered around undersea volcanic features known as black smokers. These creatures thrive despite having no access to sunlight, and it was soon discovered that they comprise an entirely independent ecosystem. Although most of these multicellular lifeforms need dissolved oxygen (produced by oxygenic photosynthesis) for their aerobic cellular respiration and thus are not completely independent from sunlight by themselves, the basis for their food chain is a form of bacterium that derives its energy from oxidization of reactive chemicals, such as hydrogen or hydrogen sulfide, that bubble up from the Earth's interior. Other lifeforms entirely decoupled from the energy from sunlight are green sulfur bacteria which are capturing geothermal light for anoxygenic photosynthesis or bacteria running chemolithoautotrophy based on the radioactive decay of uranium. This chemosynthesis revolutionized the study of biology and astrobiology by revealing that life need not be sun-dependent; it only requires water and an energy gradient in order to exist. Biologists have found extremophiles that thrive in ice, boiling water, acid, alkali, the water core of nuclear reactors, salt crystals, toxic waste and in a range of other extreme habitats that were previously thought to be inhospitable for life. This opened up a new avenue in astrobiology by massively expanding the number of possible extraterrestrial habitats. Characterization of these organisms, their environments and their evolutionary pathways, is considered a crucial component to understanding how life might evolve elsewhere in the universe. For example, some organisms able to withstand exposure to the vacuum and radiation of outer space include the lichen fungi Rhizocarpon geographicum and Xanthoria elegans, the bacterium Bacillus safensis, Deinococcus radiodurans, Bacillus subtilis, yeast Saccharomyces cerevisiae, seeds from Arabidopsis thaliana ('mouse-ear cress'), as well as the invertebrate animal Tardigrade. While tardigrades are not considered true extremophiles, they are considered extremotolerant microorganisms that have contributed to the field of astrobiology. Their extreme radiation tolerance and presence of DNA protection proteins may provide answers as to whether life can survive away from the protection of the Earth's atmosphere. Jupiter's moon, Europa, and Saturn's moon, Enceladus, are now considered the most likely locations for extant extraterrestrial life in the Solar System due to their subsurface water oceans where radiogenic and tidal heating enables liquid water to exist. The origin of life, known as abiogenesis, distinct from the evolution of life, is another ongoing field of research. Oparin and Haldane postulated that the conditions on the early Earth were conducive to the formation of organic compounds from inorganic elements and thus to the formation of many of the chemicals common to all forms of life we see today. The study of this process, known as prebiotic chemistry, has made some progress, but it is still unclear whether or not life could have formed in such a manner on Earth. The alternative hypothesis of panspermia is that the first elements of life may have formed on another planet with even more favorable conditions (or even in interstellar space, asteroids, etc.) and then have been carried over to Earth. The cosmic dust permeating the universe contains complex organic compounds ("amorphous organic solids with a mixed aromatic-aliphatic structure") that could be created naturally, and rapidly, by stars. Further, a scientist suggested that these compounds may have been related to the development of life on Earth and said that, "If this is the case, life on Earth may have had an easier time getting started as these organics can serve as basic ingredients for life." More than 20% of the carbon in the universe may be associated with polycyclic aromatic hydrocarbons (PAHs), possible starting materials for the formation of life. PAHs seem to have been formed shortly after the Big Bang, are widespread throughout the universe, and are associated with new stars and exoplanets. PAHs are subjected to interstellar medium conditions and are transformed through hydrogenation, oxygenation and hydroxylation, to more complex organics—"a step along the path toward amino acids and nucleotides, the raw materials of proteins and DNA, respectively". In October 2020, astronomers proposed the idea of detecting life on distant planets by studying the shadows of trees at certain times of the day to find patterns that could be detected through observation of exoplanets. Astroecology Astroecology concerns the interactions of life with space environments and resources, in planets, asteroids and comets. On a larger scale, astroecology concerns resources for life about stars in the galaxy through the cosmological future. Astroecology attempts to quantify future life in space, addressing this area of astrobiology. Experimental astroecology investigates resources in planetary soils, using actual space materials in meteorites. The results suggest that Martian and carbonaceous chondrite materials can support bacteria, algae and plant (asparagus, potato) cultures, with high soil fertilities. The results support that life could have survived in early aqueous asteroids and on similar materials imported to Earth by dust, comets and meteorites, and that such asteroid materials can be used as soil for future space colonies. On the largest scale, cosmoecology concerns life in the universe over cosmological times. The main sources of energy may be red giant stars and white and red dwarf stars, sustaining life for 1020 years. Astroecologists suggest that their mathematical models may quantify the potential amounts of future life in space, allowing a comparable expansion in biodiversity, potentially leading to diverse intelligent life forms. Astrogeology Astrogeology is a planetary science discipline concerned with the geology of celestial bodies such as the planets and their moons, asteroids, comets, and meteorites. The information gathered by this discipline allows the measure of a planet's or a natural satellite's potential to develop and sustain life, or planetary habitability. An additional discipline of astrogeology is geochemistry, which involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks and soils, the cycles of matter and energy and their interaction with the hydrosphere and the atmosphere of the planet. Specializations include cosmochemistry, biochemistry and organic geochemistry. The fossil record provides the oldest known evidence for life on Earth. By examining the fossil evidence, paleontologists are able to better understand the types of organisms that arose on the early Earth. Some regions on Earth, such as the Pilbara in Western Australia and the McMurdo Dry Valleys of Antarctica, are also considered to be geological analogs to regions of Mars, and as such, might be able to provide clues on how to search for past life on Mars. The various organic functional groups, composed of hydrogen, oxygen, nitrogen, phosphorus, sulfur, and a host of metals, such as iron, magnesium, and zinc, provide the enormous diversity of chemical reactions necessarily catalyzed by a living organism. Silicon, in contrast, interacts with only a few other atoms, and the large silicon molecules are monotonous compared with the combinatorial universe of organic macromolecules. Indeed, it seems likely that the basic building blocks of life anywhere will be similar to those on Earth, in the generality if not in the detail. Although terrestrial life and life that might arise independently of Earth are expected to use many similar, if not identical, building blocks, they also are expected to have some biochemical qualities that are unique. If life has had a comparable impact elsewhere in the Solar System, the relative abundances of chemicals key for its survival—whatever they may be—could betray its presence. Whatever extraterrestrial life may be, its tendency to chemically alter its environment might just give it away. Life in the Solar System People have long speculated about the possibility of life in settings other than Earth, however, speculation on the nature of life elsewhere often has paid little heed to constraints imposed by the nature of biochemistry. The likelihood that life throughout the universe is probably carbon-based is suggested by the fact that carbon is one of the most abundant of the higher elements. Only two of the natural atoms, carbon and silicon, are known to serve as the backbones of molecules sufficiently large to carry biological information. As the structural basis for life, one of carbon's important features is that, unlike silicon, it can readily engage in the formation of chemical bonds with many other atoms, thereby allowing for the chemical versatility required to conduct the reactions of biological metabolism and propagation. Discussion on where in the Solar System life might occur was limited historically by the understanding that life relies ultimately on light and warmth from the Sun and, therefore, is restricted to the surfaces of planets. The four most likely candidates for life in the Solar System are the planet Mars, the Jovian moon Europa, and Saturn's moons Titan and Enceladus. Mars, Enceladus and Europa are considered likely candidates in the search for life primarily because they may have underground liquid water, a molecule essential for life as we know it for its use as a solvent in cells. Water on Mars is found frozen in its polar ice caps, and newly carved gullies recently observed on Mars suggest that liquid water may exist, at least transiently, on the planet's surface. At the Martian low temperatures and low pressure, liquid water is likely to be highly saline. As for Europa and Enceladus, large global oceans of liquid water exist beneath these moons' icy outer crusts. This water may be warmed to a liquid state by volcanic vents on the ocean floor, but the primary source of heat is probably tidal heating. On 11 December 2013, NASA reported the detection of "clay-like minerals" (specifically, phyllosilicates), often associated with organic materials, on the icy crust of Europa. The presence of the minerals may have been the result of a collision with an asteroid or comet according to the scientists. Additionally, on 27 June 2018, astronomers reported the detection of complex macromolecular organics on Enceladus and, according to NASA scientists in May 2011, "is emerging as the most habitable spot beyond Earth in the Solar System for life as we know it". Another planetary body that could potentially sustain extraterrestrial life is Saturn's largest moon, Titan. Titan has been described as having conditions similar to those of early Earth. On its surface, scientists have discovered the first liquid lakes outside Earth, but these lakes seem to be composed of ethane and/or methane, not water. Some scientists think it possible that these liquid hydrocarbons might take the place of water in living cells different from those on Earth. After Cassini data were studied, it was reported in March 2008 that Titan may also have an underground ocean composed of liquid water and ammonia. Phosphine has been detected in the atmosphere of the planet Venus. There are no known abiotic processes on the planet that could cause its presence. Given that Venus has the hottest surface temperature of any planet in the solar system, Venusian life, if it exists, is most likely limited to extremophile microorganisms that float in the planet's upper atmosphere, where conditions are almost Earth-like. Measuring the ratio of hydrogen and methane levels on Mars may help determine the likelihood of life on Mars. According to the scientists, "...low H2/CH4 ratios (less than approximately 40) indicate that life is likely present and active." Other scientists have recently reported methods of detecting hydrogen and methane in extraterrestrial atmospheres. Complex organic compounds of life, including uracil, cytosine and thymine, have been formed in a laboratory under outer space conditions, using starting chemicals such as pyrimidine, found in meteorites. Pyrimidine, like polycyclic aromatic hydrocarbons (PAHs), is the most carbon-rich chemical found in the universe. Rare Earth hypothesis The Rare Earth hypothesis postulates that multicellular life forms found on Earth may actually be more of a rarity than scientists assume. According to this hypothesis, life on Earth (and more, multi-cellular life) is possible because of a conjunction of the right circumstances (galaxy and location within it, solar system, star, orbit, planetary size, atmosphere, etc.); and the chance for all those circumstances to repeat elsewhere may be rare. It provides a possible answer to the Fermi paradox which suggests, "If extraterrestrial aliens are common, why aren't they obvious?" It is apparently in opposition to the principle of mediocrity, assumed by famed astronomers Frank Drake, Carl Sagan, and others. The Principle of Mediocrity suggests that life on Earth is not exceptional, and it is more than likely to be found on innumerable other worlds. Research The systematic search for possible life outside Earth is a valid multidisciplinary scientific endeavor. However, hypotheses and predictions as to its existence and origin vary widely, and at the present, the development of hypotheses firmly grounded on science may be considered astrobiology's most concrete practical application. It has been proposed that viruses are likely to be encountered on other life-bearing planets, and may be present even if there are no biological cells. Research outcomes , no evidence of extraterrestrial life has been identified. Examination of the Allan Hills 84001 meteorite, which was recovered in Antarctica in 1984 and originated from Mars, is thought by David McKay, as well as few other scientists, to contain microfossils of extraterrestrial origin; this interpretation is controversial. Yamato 000593, the second largest meteorite from Mars, was found on Earth in 2000. At a microscopic level, spheres are found in the meteorite that are rich in carbon compared to surrounding areas that lack such spheres. The carbon-rich spheres may have been formed by biotic activity according to some NASA scientists. On 5 March 2011, Richard B. Hoover, a scientist with the Marshall Space Flight Center, speculated on the finding of alleged microfossils similar to cyanobacteria in CI1 carbonaceous meteorites in the fringe Journal of Cosmology, a story widely reported on by mainstream media. However, NASA formally distanced itself from Hoover's claim. According to American astrophysicist Neil deGrasse Tyson: "At the moment, life on Earth is the only known life in the universe, but there are compelling arguments to suggest we are not alone." Extreme environments on Earth On 17 March 2013, researchers reported that microbial life forms thrive in the Mariana Trench, the deepest spot on the Earth. Other researchers reported that microbes thrive inside rocks up to below the sea floor under of ocean off the coast of the northwestern United States. According to one of the researchers, "You can find microbes everywhere—they're extremely adaptable to conditions, and survive wherever they are." Evidence of perchlorates have been found throughout the solar system, and specifically on Mars. Dr. Kennda Lynch discovered the first known instance of perchlorates and perchlorates-reducing microbes in a paleolake in Pilot Valley, Utah. These finds expand the potential habitability of certain niches of other planets. Methane In 2004, the spectral signature of methane () was detected in the Martian atmosphere by both Earth-based telescopes as well as by the Mars Express orbiter. Because of solar radiation and cosmic radiation, methane is predicted to disappear from the Martian atmosphere within several years, so the gas must be actively replenished in order to maintain the present concentration. On 7 June 2018, NASA announced a cyclical seasonal variation in atmospheric methane, which may be produced by geological or biological sources. The European ExoMars Trace Gas Orbiter is currently measuring and mapping the atmospheric methane. Planetary systems It is possible that some exoplanets may have moons with solid surfaces or liquid oceans that are hospitable. Most of the planets so far discovered outside the Solar System are hot gas giants thought to be inhospitable to life, so it is not yet known whether the Solar System, with a warm, rocky, metal-rich inner planet such as Earth, is of an aberrant composition. Improved detection methods and increased observation time will undoubtedly discover more planetary systems, and possibly some more like ours. For example, NASA's Kepler Mission seeks to discover Earth-sized planets around other stars by measuring minute changes in the star's light curve as the planet passes between the star and the spacecraft. Progress in infrared astronomy and submillimeter astronomy has revealed the constituents of other star systems. Planetary habitability Efforts to answer questions such as the abundance of potentially habitable planets in habitable zones and chemical precursors have had much success. Numerous extrasolar planets have been detected using the wobble method and transit method, showing that planets around other stars are more numerous than previously postulated. The first Earth-sized extrasolar planet to be discovered within its star's habitable zone is Gliese 581 c. Extremophiles Studying extremophiles is useful for understanding the possible origin of life on Earth as well as for finding the most likely candidates for future colonization of other planets. The aim is to detect those organisms that are able to survive space travel conditions and to maintain the proliferating capacity. The best candidates are extremophiles, since they have adapted to survive in different kind of extreme conditions on earth. During the course of evolution, extremophiles have developed various strategies to survive the different stress conditions of different extreme environments. These stress responses could also allow them to survive in harsh space conditions, although evolution also puts some restrictions on their use as analogues to extraterrestrial life. Thermophilic species G. thermantarcticus is a good example of a microorganism that could survive space travel. It is a bacterium of the spore-forming genus Bacillus. The formation of spores allows for it to survive extreme environments while still being able to restart cellular growth. It is capable of effectively protecting its DNA, membrane and proteins integrity in different extreme conditions (desiccation, temperatures up to -196 °C, UVC and C-ray radiation...). It is also able to repair the damage produced by space environment. Some locations on Earth are particularly well-suited for astrobiological studies of extremophiles. For example, Valeria Souza and colleagues proposed that the Cuatro Ciénegas basin in Coahuila, Mexico, could serve as an "astrobiological Precambrian park" due to the similarity of some of its ecosystems to an earlier time in Earth's history when multicellular life began to dominate. By understanding how extremophilic organisms can survive the Earth's extreme environments, we can also understand how microorganisms could have survived space travel and how the panspermia hypothesis could be possible. Missions Research into the environmental limits of life and the workings of extreme ecosystems is ongoing, enabling researchers to better predict what planetary environments might be most likely to harbor life. Missions such as the Phoenix lander, Mars Science Laboratory, ExoMars, Mars 2020 rover to Mars, and the Cassini probe to Saturn's moons aim to further explore the possibilities of life on other planets in the Solar System. Viking program The two Viking landers each carried four types of biological experiments to the surface of Mars in the late 1970s. These were the only Mars landers to carry out experiments looking specifically for metabolism by current microbial life on Mars. The landers used a robotic arm to collect soil samples into sealed test containers on the craft. The two landers were identical, so the same tests were carried out at two places on Mars' surface; Viking 1 near the equator and Viking 2 further north. The result was inconclusive, and is still disputed by some scientists. Norman Horowitz was the chief of the Jet Propulsion Laboratory bioscience section for the Mariner and Viking missions from 1965 to 1976. Horowitz considered that the great versatility of the carbon atom makes it the element most likely to provide solutions, even exotic solutions, to the problems of survival of life on other planets. However, he also considered that the conditions found on Mars were incompatible with carbon based life. Beagle 2 Beagle 2 was an unsuccessful British Mars lander that formed part of the European Space Agency's 2003 Mars Express mission. Its primary purpose was to search for signs of life on Mars, past or present. Although it landed safely, it was unable to correctly deploy its solar panels and telecom antenna. EXPOSE EXPOSE is a multi-user facility mounted in 2008 outside the International Space Station dedicated to astrobiology. EXPOSE was developed by the European Space Agency (ESA) for long-term spaceflights that allow exposure of organic chemicals and biological samples to outer space in low Earth orbit. Mars Science Laboratory The Mars Science Laboratory (MSL) mission landed the Curiosity rover that is currently in operation on Mars. It was launched 26 November 2011, and landed at Gale Crater on 6 August 2012. Mission objectives are to help assess Mars' habitability and in doing so, determine whether Mars is or has ever been able to support life, collect data for a future human mission, study Martian geology, its climate, and further assess the role that water, an essential ingredient for life as we know it, played in forming minerals on Mars. Tanpopo The Tanpopo mission is an orbital astrobiology experiment investigating the potential interplanetary transfer of life, organic compounds, and possible terrestrial particles in the low Earth orbit. The purpose is to assess the panspermia hypothesis and the possibility of natural interplanetary transport of microbial life as well as prebiotic organic compounds. Early mission results show evidence that some clumps of microorganism can survive for at least one year in space. This may support the idea that clumps greater than 0.5 millimeters of microorganisms could be one way for life to spread from planet to planet. ExoMars rover ExoMars is a robotic mission to Mars to search for possible biosignatures of Martian life, past or present. This astrobiological mission is currently under development by the European Space Agency (ESA) in partnership with the Russian Federal Space Agency (Roscosmos); it is planned for a 2022 launch. Mars 2020 Mars 2020 successfully landed its rover Perseverance in Jezero Crater on 18 February 2021. It will investigate environments on Mars relevant to astrobiology, investigate its surface geological processes and history, including the assessment of its past habitability and potential for preservation of biosignatures and biomolecules within accessible geological materials. The Science Definition Team is proposing the rover collect and package at least 31 samples of rock cores and soil for a later mission to bring back for more definitive analysis in laboratories on Earth. The rover could make measurements and technology demonstrations to help designers of a human expedition understand any hazards posed by Martian dust and demonstrate how to collect carbon dioxide (CO2), which could be a resource for making molecular oxygen (O2) and rocket fuel. Europa Clipper Europa Clipper is a mission planned by NASA for a 2025 launch that will conduct detailed reconnaissance of Jupiter's moon Europa and will investigate whether its internal ocean could harbor conditions suitable for life. It will also aid in the selection of future landing sites. Proposed concepts Icebreaker Life Icebreaker Life is a lander mission that was proposed for NASA's Discovery Program for the 2021 launch opportunity, but it was not selected for development. It would have had a stationary lander that would be a near copy of the successful 2008 Phoenix and it would have carried an upgraded astrobiology scientific payload, including a 1-meter-long core drill to sample ice-cemented ground in the northern plains to conduct a search for organic molecules and evidence of current or past life on Mars. One of the key goals of the Icebreaker Life mission is to test the hypothesis that the ice-rich ground in the polar regions has significant concentrations of organics due to protection by the ice from oxidants and radiation. Journey to Enceladus and Titan Journey to Enceladus and Titan (JET) is an astrobiology mission concept to assess the habitability potential of Saturn's moons Enceladus and Titan by means of an orbiter. Enceladus Life Finder Enceladus Life Finder (ELF) is a proposed astrobiology mission concept for a space probe intended to assess the habitability of the internal aquatic ocean of Enceladus, Saturn's sixth-largest moon. Life Investigation For Enceladus Life Investigation For Enceladus (LIFE) is a proposed astrobiology sample-return mission concept. The spacecraft would enter into Saturn orbit and enable multiple flybys through Enceladus' icy plumes to collect icy plume particles and volatiles and return them to Earth on a capsule. The spacecraft may sample Enceladus' plumes, the E ring of Saturn, and the upper atmosphere of Titan. Oceanus Oceanus is an orbiter proposed in 2017 for the New Frontiers mission No. 4. It would travel to the moon of Saturn, Titan, to assess its habitability. Oceanus objectives are to reveal Titan's organic chemistry, geology, gravity, topography, collect 3D reconnaissance data, catalog the organics and determine where they may interact with liquid water. Explorer of Enceladus and Titan Explorer of Enceladus and Titan (E2T) is an orbiter mission concept that would investigate the evolution and habitability of the Saturnian satellites Enceladus and Titan. The mission concept was proposed in 2017 by the European Space Agency. See also Astrobiology.com Top ranked news source for Astrobiology The Living Cosmos References Bibliography The International Journal of Astrobiology, published by Cambridge University Press, is the forum for practitioners in this interdisciplinary field. Astrobiology, published by Mary Ann Liebert, Inc., is a peer-reviewed journal that explores the origins of life, evolution, distribution, and destiny in the universe. Loeb, Avi (2021). Extraterrestrial: The First Sign of Intelligent Life Beyond Earth. Houghton Mifflin Harcourt. Further reading D. Goldsmith, T. Owen, The Search For Life in the Universe, Addison-Wesley Publishing Company, 2001 (3rd edition). Andy Weir's best-selling 2021 novel, Project Hail Mary, centers on astrobiology. Dealing with climate change caused by space-dwelling microbes, an astronaut finds that another civilization is suffering from the same problem. External links Astrobiology.nasa.gov UK Centre for Astrobiology Spanish Centro de Astrobiología Astrobiology Research at The Library of Congress Astrobiology Magazine Exploring Solar System and Beyond Astrobiology Survey – An introductory course on astrobiology Summary - Search For Life Beyond Earth (NASA; 25 June 2021) Extraterrestrial life Origin of life Astronomical sub-disciplines Branches of biology Speculative evolution

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https://en.wikipedia.org/wiki/Air%20show

Air show

An air show, (or airshow, air fair, air tattoo) is a public event where aircraft are exhibited. They often include aerobatics demonstrations, without they are called "static air shows" with aircraft parked on the ground. The largest air show measured by number of exhibitors and size of exhibit space is Le Bourget followed by Farnborough, while Dubai air show and Singapore Air Show are both claiming the third place. The largest air show or fly-in by number of participating airplanes is EAA AirVenture Oshkosh, commonly known as "Oshkosh" after its location in Wisconsin, with approximately 10,000 airplanes participating each year. The biggest military airshow in the world is the Royal International Air Tattoo, at RAF Fairford in England. Outline Some airshows are held as a business venture or as a trade event where aircraft, avionics and other services are promoted to potential customers. Many air shows are held in support of local, national or military charities. Military air firms often organise air shows at military airfields as a public relations exercise to thank the local community, promote military careers and raise the profile of the military. Air "seasons" vary around the world. The United States enjoys a long season that generally runs from March to November, covering the spring, summer, and fall seasons. Other countries often have much shorter seasons. In Japan air shows are generally events held at Japan Self-Defense Forces bases regularly throughout the year. The European season usually starts in late April or Early May and is usually over by mid October. The Middle East, Australia and New Zealand hold their events between January and March. However, for many acts, the "off-season" does not mean a period of inactivity; pilots and performers use this time for maintenance and practice. The type of displays seen at shows are constrained by a number of factors, including the weather and visibility. Most aviation authorities now publish rules and guidance on minimum display heights and criteria for differing conditions. In addition to the weather, pilots and organizers must also consider local airspace restrictions. Most exhibitors will plan "full," "rolling" and "flat" display for varying weather and airspace conditions. The types of shows vary greatly. Some are large scale military events with large flying displays and ground exhibitions while others held at small local airstrips can often feature just one or two hours of flying with just a few stalls on the ground. Air Displays can be held during day or night with the latter becoming increasingly popular. Shows don't always take place over airfields; some have been held over the grounds of stately homes or castles and over the sea at coastal resorts. The first public international airshow, at which many types of aircraft were displayed and flown, was the Grande Semaine d'Aviation de la Champagne, which was held Aug. 22–29, 1909 in Reims. This had been preceded by what may have been the first ever gathering of enthusiasts, June 28 – July 19 of the same year at the airfield at La Brayelle, near Douai. Attractions Before the Second World War, air shows were associated with long-distance air races, often lasting many days and covering thousands of miles. While the Reno Air Races keep this tradition alive, most air shows today primarily feature a series of aerial demos of short duration. Most air shows feature warbirds, aerobatics, and demonstrations of modern military aircraft, and many air shows offer a variety of other aeronautical attractions as well, such as wing-walking, radio-controlled aircraft, water/slurry drops from firefighting aircraft, simulated helicopter rescues and sky diving. Specialist aerobatic aircraft have powerful piston engines, light weight and big control surfaces, making them capable of very high roll rates and accelerations. A skilled pilot will be able to climb vertically, perform very tight turns, tumble his aircraft end-over-end and perform manoeuvres during loops. Larger airshows can be headlined by military jet demonstration teams. In the United States, those are the U.S. Navy Blue Angels and U.S. Air Force Thunderbirds. The Canadian Forces Snowbirds will headline many airshows in Canada and the United States. Many airshows in the United Kingdom are headlined by the RAF's Red Arrows. Solo military jet demos, also known as tactical demo, feature one aircraft, usually a strike fighter or an advanced trainer. The demonstration focuses on the capabilities of modern aircraft used in combat operations. The display will usually demonstrate the aircraft's very short (and often very loud) rolls, fast speeds, slow approach speeds, as well as their ability to quickly make tight turns, to climb quickly, and their ability to be precisely controlled at a large range of speeds. Manoeuvres include aileron rolls, barrel rolls, hesitation rolls, Cuban-8s, tight turns, high-alpha flight, a high-speed pass, double Immelmans, and touch-and-gos. Tactical demos may include simulated bomb drops, sometimes with pyrotechnics on the ground for effect. Aircraft with special characteristics that give them unique capabilities will often display those in their demos; For example, Russian fighters with Thrust vectoring may be used to perform Pugachev's Cobra or the Kulbit, among other difficult manoeuvers that cannot be performed by other aircraft. Similarly, an F-22 pilot may hover his jet in the air with the nose pointed straight up, a Harrier or Osprey pilot may perform a vertical landing or vertical takeoff, and so on. Safety Air shows may present some risk to spectators and aviators. Accidents have occurred, sometimes with a large loss of life, such as the 1988 disaster at Ramstein Air Base (70 deaths) in Germany and the 2002 air show crash at Sknyliv (77 deaths), Ukraine. Because of these accidents, the various aviation authorities around the world have set rules and guidance for those running and participating in air displays. For example, after the breakup of an aircraft at 1952 Farnborough air show (31 deaths), the separation between display and spectators was increased. Air displays are often monitored by aviation authorities to ensure safe procedures. In the United Kingdom, local authorities will first need to approve any application for an event to which the public is admitted. No approval, no event. The first priority must be to arrange insurance cover and details can be obtained from your local authority. An added complication is a whole new raft of legislation concerning Health & Safety in particular Corporate Manslaughter, which can involve the event organiser being charged with a criminal offence if any of the insurances and risk assessments are not fully completed well in advance of the event. If this very basic step isn't completed then any further activity should be halted until it is. Rules govern the distance from the crowds that aircraft must fly. These vary according to the rating of the pilot/crew, the type of aircraft and the way the aircraft is being flown. For instance, slower lighter aircraft are usually allowed closer and lower to the crowd than larger, faster types. Also, a fighter jet flying straight and level will be able to do so closer to the crowd and lower than if it were performing a roll or a loop. Pilots can get authorizations for differing types of displays (i.e. limbo flying, basic aerobatics to unlimited aerobatics) and to differing minimum base heights above the ground. To gain such authorizations, the pilots will have to demonstrate to an examiner that they can perform to those limits without endangering themselves, ground crew or spectators. Despite display rules and guidances, accidents have continued to happen. However, air show accidents are rare and where there is proper supervision air shows have impressive safety records. Each year, organizations such as International Council of Air Shows and European Airshow Council meet and discuss various subjects including air show safety where accidents are discussed and lessons learned. See also Fly-in Flypast Barnstorming List of airshow accidents List of air shows Teardrop turn Whifferdill turn Bessie Coleman References Further reading Brett Holman, "The militarisation of aerial theatre: air displays and airmindedness in Britain and Australia between the world wars", Contemporary British History, vol. 33, no. 4 (2019), pp. 483–506. External links International Council of Air Shows Experimental Aircraft Association Calendar Royal Aero Club Events Flightglobal's Upcoming air shows USAF Thunderbirds Canadian Forces Snowbirds History of transport events

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https://en.wikipedia.org/wiki/Anthropic%20principle

Anthropic principle

The anthropic principle is the principle that there is a restrictive lower bound on how statistically probable our observations of the universe are, given that we could only exist in the particular type of universe capable of developing and sustaining sentient life. Proponents of the anthropic principle argue that it explains why this universe has the age and the fundamental physical constants necessary to accommodate conscious life, since if either had been different, we would not have been around to make observations. Anthropic reasoning is often used to deal with the notion that the universe seems to be fine tuned. There are many different formulations of the anthropic principle. Philosopher Nick Bostrom counts them at thirty, but the underlying principles can be divided into "weak" and "strong" forms, depending on the types of cosmological claims they entail. The weak anthropic principle (WAP), such as the one defined by Brandon Carter, states that the universe's ostensible fine tuning is the result of selection bias (specifically survivorship bias). Most often such arguments draw upon some notion of the multiverse for there to be a statistical population of universes to select from. However, a single vast universe is sufficient for most forms of the WAP that do not specifically deal with fine tuning. The strong anthropic principle (SAP), as proposed by John D. Barrow and Frank Tipler, states that the universe is in some sense compelled to eventually have conscious and sapient life emerge within it. Definition and basis The principle was formulated as a response to a series of observations that the laws of nature and parameters of the universe take on values that are consistent with conditions for life as we know it rather than a set of values that would not be consistent with life on Earth. The anthropic principle states that this is a necessity, because if life were impossible, no living entity would be there to observe it, and thus would not be known. That is, it must be possible to observe some universe, and hence, the laws and constants of any such universe must accommodate that possibility. The term anthropic in "anthropic principle" has been argued to be a misnomer. While singling out our kind of carbon-based life, none of the finely tuned phenomena require human life or some kind of carbon chauvinism. Any form of life or any form of heavy atom, stone, star or galaxy would do; nothing specifically human or anthropic is involved. The anthropic principle has given rise to some confusion and controversy, partly because the phrase has been applied to several distinct ideas. All versions of the principle have been accused of discouraging the search for a deeper physical understanding of the universe. The anthropic principle is often criticized for lacking falsifiability and therefore its critics may point out that the anthropic principle is a non-scientific concept, even though the weak anthropic principle, "conditions that are observed in the universe must allow the observer to exist", is "easy" to support in mathematics and philosophy (i.e., it is a tautology or truism). However, building a substantive argument based on a tautological foundation is problematic. Stronger variants of the anthropic principle are not tautologies and thus make claims considered controversial by some and that are contingent upon empirical verification. Anthropic 'coincidences' In 1961, Robert Dicke noted that the age of the universe, as seen by living observers, cannot be random. Instead, biological factors constrain the universe to be more or less in a "golden age", neither too young nor too old. If the universe were one tenth as old as its present age, there would not have been sufficient time to build up appreciable levels of metallicity (levels of elements besides hydrogen and helium) especially carbon, by nucleosynthesis. Small rocky planets did not yet exist. If the universe were 10 times older than it actually is, most stars would be too old to remain on the main sequence and would have turned into white dwarfs, aside from the dimmest red dwarfs, and stable planetary systems would have already come to an end. Thus, Dicke explained the coincidence between large dimensionless numbers constructed from the constants of physics and the age of the universe, a coincidence that inspired Dirac's varying-G theory. Dicke later reasoned that the density of matter in the universe must be almost exactly the critical density needed to prevent the Big Crunch (the "Dicke coincidences" argument). The most recent measurements may suggest that the observed density of baryonic matter, and some theoretical predictions of the amount of dark matter account for about 30% of this critical density, with the rest contributed by a cosmological constant. Steven Weinberg gave an anthropic explanation for this fact: he noted that the cosmological constant has a remarkably low value, some 120 orders of magnitude smaller than the value particle physics predicts (this has been described as the "worst prediction in physics"). However, if the cosmological constant were only several orders of magnitude larger than its observed value, the universe would suffer catastrophic inflation, which would preclude the formation of stars, and hence life. The observed values of the dimensionless physical constants (such as the fine-structure constant) governing the four fundamental interactions are balanced as if fine-tuned to permit the formation of commonly found matter and subsequently the emergence of life. A slight increase in the strong interaction would bind the dineutron and the diproton and convert all hydrogen in the early universe to helium; likewise, an increase in the weak interaction also would convert all hydrogen to helium. Water, as well as sufficiently long-lived stable stars, both essential for the emergence of life as we know it, would not exist. More generally, small changes in the relative strengths of the four fundamental interactions can greatly affect the universe's age, structure, and capacity for life. Origin The phrase "anthropic principle" first appeared in Brandon Carter's contribution to a 1973 Kraków symposium honouring Copernicus's 500th birthday. Carter, a theoretical astrophysicist, articulated the Anthropic Principle in reaction to the Copernican Principle, which states that humans do not occupy a privileged position in the Universe. Carter said: "Although our situation is not necessarily central, it is inevitably privileged to some extent." Specifically, Carter disagreed with using the Copernican principle to justify the Perfect Cosmological Principle, which states that all large regions and times in the universe must be statistically identical. The latter principle underlay the steady-state theory, which had recently been falsified by the 1965 discovery of the cosmic microwave background radiation. This discovery was unequivocal evidence that the universe has changed radically over time (for example, via the Big Bang). Carter defined two forms of the anthropic principle, a "weak" one which referred only to anthropic selection of privileged spacetime locations in the universe, and a more controversial "strong" form that addressed the values of the fundamental constants of physics. Roger Penrose explained the weak form as follows: One reason this is plausible is that there are many other places and times in which we can imagine finding ourselves. But when applying the strong principle, we only have one universe, with one set of fundamental parameters, so what exactly is the point being made? Carter offers two possibilities: First, we can use our own existence to make "predictions" about the parameters. But second, "as a last resort", we can convert these predictions into explanations by assuming that there is more than one universe, in fact a large and possibly infinite collection of universes, something that is now called the multiverse ("world ensemble" was Carter's term), in which the parameters (and perhaps the laws of physics) vary across universes. The strong principle then becomes an example of a selection effect, exactly analogous to the weak principle. Postulating a multiverse is certainly a radical step, but taking it could provide at least a partial answer to a question seemingly out of the reach of normal science: "Why do the fundamental laws of physics take the particular form we observe and not another?" Since Carter's 1973 paper, the term anthropic principle has been extended to cover a number of ideas that differ in important ways from his. Particular confusion was caused by the 1986 book The Anthropic Cosmological Principle by John D. Barrow and Frank Tipler, which distinguished between a "weak" and "strong" anthropic principle in a way very different from Carter's, as discussed in the next section. Carter was not the first to invoke some form of the anthropic principle. In fact, the evolutionary biologist Alfred Russel Wallace anticipated the anthropic principle as long ago as 1904: "Such a vast and complex universe as that which we know exists around us, may have been absolutely required [...] in order to produce a world that should be precisely adapted in every detail for the orderly development of life culminating in man." In 1957, Robert Dicke wrote: "The age of the Universe 'now' is not random but conditioned by biological factors [...] [changes in the values of the fundamental constants of physics] would preclude the existence of man to consider the problem." Ludwig Boltzmann may have been one of the first in modern science to use anthropic reasoning. Prior to knowledge of the Big Bang Boltzmann's thermodynamic concepts painted a picture of a universe that had inexplicably low entropy. Boltzmann suggested several explanations, one of which relied on fluctuations that could produce pockets of low entropy or Boltzmann universes. While most of the universe is featureless in this model, to Boltzmann, it is unremarkable that humanity happens to inhabit a Boltzmann universe, as that is the only place where intelligent life could be. Variants Weak anthropic principle (WAP) (Carter): "[W]e must be prepared to take account of the fact that our location in the universe is necessarily privileged to the extent of being compatible with our existence as observers." Note that for Carter, "location" refers to our location in time as well as space. Strong anthropic principle (SAP) (Carter): "[T]he universe (and hence the fundamental parameters on which it depends) must be such as to admit the creation of observers within it at some stage. To paraphrase Descartes, cogito ergo mundus talis est."The Latin tag ("I think, therefore the world is such [as it is]") makes it clear that "must" indicates a deduction from the fact of our existence; the statement is thus a truism. In their 1986 book, The Anthropic Cosmological Principle, John Barrow and Frank Tipler depart from Carter and define the WAP and SAP as follows: Weak anthropic principle (WAP) (Barrow and Tipler): "The observed values of all physical and cosmological quantities are not equally probable but they take on values restricted by the requirement that there exist sites where carbon-based life can evolve and by the requirements that the universe be old enough for it to have already done so."Unlike Carter they restrict the principle to carbon-based life, rather than just "observers". A more important difference is that they apply the WAP to the fundamental physical constants, such as the fine-structure constant, the number of spacetime dimensions, and the cosmological constant—topics that fall under Carter's SAP. Strong anthropic principle (SAP) (Barrow and Tipler): "The Universe must have those properties which allow life to develop within it at some stage in its history."This looks very similar to Carter's SAP, but unlike the case with Carter's SAP, the "must" is an imperative, as shown by the following three possible elaborations of the SAP, each proposed by Barrow and Tipler: "There exists one possible Universe 'designed' with the goal of generating and sustaining 'observers'." This can be seen as simply the classic design argument restated in the garb of contemporary cosmology. It implies that the purpose of the universe is to give rise to intelligent life, with the laws of nature and their fundamental physical constants set to ensure that life as we know it emerges and evolves. "Observers are necessary to bring the Universe into being." Barrow and Tipler believe that this is a valid conclusion from quantum mechanics, as John Archibald Wheeler has suggested, especially via his idea that information is the fundamental reality (see It from bit) and his Participatory anthropic principle (PAP) which is an interpretation of quantum mechanics associated with the ideas of John von Neumann and Eugene Wigner. "An ensemble of other different universes is necessary for the existence of our Universe." By contrast, Carter merely says that an ensemble of universes is necessary for the SAP to count as an explanation. The philosophers John Leslie and Nick Bostrom reject the Barrow and Tipler SAP as a fundamental misreading of Carter. For Bostrom, Carter's anthropic principle just warns us to make allowance for anthropic bias—that is, the bias created by anthropic selection effects (which Bostrom calls "observation" selection effects)—the necessity for observers to exist in order to get a result. He writes: Strong self-sampling assumption (SSSA) (Bostrom): "Each observer-moment should reason as if it were randomly selected from the class of all observer-moments in its reference class." Analysing an observer's experience into a sequence of "observer-moments" helps avoid certain paradoxes; but the main ambiguity is the selection of the appropriate "reference class": for Carter's WAP this might correspond to all real or potential observer-moments in our universe; for the SAP, to all in the multiverse. Bostrom's mathematical development shows that choosing either too broad or too narrow a reference class leads to counter-intuitive results, but he is not able to prescribe an ideal choice. According to Jürgen Schmidhuber, the anthropic principle essentially just says that the conditional probability of finding yourself in a universe compatible with your existence is always 1. It does not allow for any additional nontrivial predictions such as "gravity won't change tomorrow". To gain more predictive power, additional assumptions on the prior distribution of alternative universes are necessary. Playwright and novelist Michael Frayn describes a form of the Strong Anthropic Principle in his 2006 book The Human Touch, which explores what he characterises as "the central oddity of the Universe": Character of anthropic reasoning Carter chose to focus on a tautological aspect of his ideas, which has resulted in much confusion. In fact, anthropic reasoning interests scientists because of something that is only implicit in the above formal definitions, namely that we should give serious consideration to there being other universes with different values of the "fundamental parameters"—that is, the dimensionless physical constants and initial conditions for the Big Bang. Carter and others have argued that life as we know it would not be possible in most such universes. In other words, the universe we are in is fine tuned to permit life. Collins & Hawking (1973) characterized Carter's then-unpublished big idea as the postulate that "there is not one universe but a whole infinite ensemble of universes with all possible initial conditions". If this is granted, the anthropic principle provides a plausible explanation for the fine tuning of our universe: the "typical" universe is not fine-tuned, but given enough universes, a small fraction will be capable of supporting intelligent life. Ours must be one of these, and so the observed fine tuning should be no cause for wonder. Although philosophers have discussed related concepts for centuries, in the early 1970s the only genuine physical theory yielding a multiverse of sorts was the many-worlds interpretation of quantum mechanics. This would allow variation in initial conditions, but not in the truly fundamental constants. Since that time a number of mechanisms for producing a multiverse have been suggested: see the review by Max Tegmark. An important development in the 1980s was the combination of inflation theory with the hypothesis that some parameters are determined by symmetry breaking in the early universe, which allows parameters previously thought of as "fundamental constants" to vary over very large distances, thus eroding the distinction between Carter's weak and strong principles. At the beginning of the 21st century, the string landscape emerged as a mechanism for varying essentially all the constants, including the number of spatial dimensions. The anthropic idea that fundamental parameters are selected from a multitude of different possibilities (each actual in some universe or other) contrasts with the traditional hope of physicists for a theory of everything having no free parameters. As Albert Einstein said: "What really interests me is whether God had any choice in the creation of the world." In 2002, some proponents of the leading candidate for a "theory of everything", string theory, proclaimed "the end of the anthropic principle" since there would be no free parameters to select. In 2003, however, Leonard Susskind stated: "...it seems plausible that the landscape is unimaginably large and diverse. Whether we like it or not, this is the kind of behavior that gives credence to the Anthropic Principle." The modern form of a design argument is put forth by intelligent design. Proponents of intelligent design often cite the fine-tuning observations that (in part) preceded the formulation of the anthropic principle by Carter as a proof of an intelligent designer. Opponents of intelligent design are not limited to those who hypothesize that other universes exist; they may also argue, anti-anthropically, that the universe is less fine-tuned than often claimed, or that accepting fine tuning as a brute fact is less astonishing than the idea of an intelligent creator. Furthermore, even accepting fine tuning, Sober (2005) and Ikeda and Jefferys, argue that the Anthropic Principle as conventionally stated actually undermines intelligent design. Paul Davies's book The Goldilocks Enigma (2006) reviews the current state of the fine tuning debate in detail, and concludes by enumerating the following responses to that debate: The absurd universe: Our universe just happens to be the way it is. The unique universe: There is a deep underlying unity in physics that necessitates the Universe being the way it is. Some Theory of Everything will explain why the various features of the Universe must have exactly the values that we see. The multiverse: Multiple universes exist, having all possible combinations of characteristics, and we inevitably find ourselves within a universe that allows us to exist. Intelligent design: A creator designed the Universe with the purpose of supporting complexity and the emergence of intelligence. The life principle: There is an underlying principle that constrains the Universe to evolve towards life and mind. The self-explaining universe: A closed explanatory or causal loop: "perhaps only universes with a capacity for consciousness can exist". This is Wheeler's Participatory Anthropic Principle (PAP). The fake universe: We live inside a virtual reality simulation. Omitted here is Lee Smolin's model of cosmological natural selection, also known as fecund universes, which proposes that universes have "offspring" that are more plentiful if they resemble our universe. Also see Gardner (2005). Clearly each of these hypotheses resolve some aspects of the puzzle, while leaving others unanswered. Followers of Carter would admit only option 3 as an anthropic explanation, whereas 3 through 6 are covered by different versions of Barrow and Tipler's SAP (which would also include 7 if it is considered a variant of 4, as in Tipler 1994). The anthropic principle, at least as Carter conceived it, can be applied on scales much smaller than the whole universe. For example, Carter (1983) inverted the usual line of reasoning and pointed out that when interpreting the evolutionary record, one must take into account cosmological and astrophysical considerations. With this in mind, Carter concluded that given the best estimates of the age of the universe, the evolutionary chain culminating in Homo sapiens probably admits only one or two low probability links. Observational evidence No possible observational evidence bears on Carter's WAP, as it is merely advice to the scientist and asserts nothing debatable. The obvious test of Barrow's SAP, which says that the universe is "required" to support life, is to find evidence of life in universes other than ours. Any other universe is, by most definitions, unobservable (otherwise it would be included in our portion of this universe). Thus, in principle Barrow's SAP cannot be falsified by observing a universe in which an observer cannot exist. Philosopher John Leslie states that the Carter SAP (with multiverse) predicts the following: Physical theory will evolve so as to strengthen the hypothesis that early phase transitions occur probabilistically rather than deterministically, in which case there will be no deep physical reason for the values of fundamental constants; Various theories for generating multiple universes will prove robust; Evidence that the universe is fine tuned will continue to accumulate; No life with a non-carbon chemistry will be discovered; Mathematical studies of galaxy formation will confirm that it is sensitive to the rate of expansion of the universe. Hogan has emphasised that it would be very strange if all fundamental constants were strictly determined, since this would leave us with no ready explanation for apparent fine tuning. In fact we might have to resort to something akin to Barrow and Tipler's SAP: there would be no option for such a universe not to support life. Probabilistic predictions of parameter values can be made given: a particular multiverse with a "measure", i.e. a well defined "density of universes" (so, for parameter X, one can calculate the prior probability P(X0) dX that X is in the range X0 < X < X0 + dX), and an estimate of the number of observers in each universe, N(X) (e.g., this might be taken as proportional to the number of stars in the universe). The probability of observing value X is then proportional to N(X) P(X). A generic feature of an analysis of this nature is that the expected values of the fundamental physical constants should not be "over-tuned", i.e. if there is some perfectly tuned predicted value (e.g. zero), the observed value need be no closer to that predicted value than what is required to make life possible. The small but finite value of the cosmological constant can be regarded as a successful prediction in this sense. One thing that would not count as evidence for the Anthropic Principle is evidence that the Earth or the Solar System occupied a privileged position in the universe, in violation of the Copernican principle (for possible counterevidence to this principle, see Copernican principle), unless there was some reason to think that that position was a necessary condition for our existence as observers. Applications of the principle The nucleosynthesis of carbon-12 Fred Hoyle may have invoked anthropic reasoning to predict an astrophysical phenomenon. He is said to have reasoned, from the prevalence on Earth of life forms whose chemistry was based on carbon-12 nuclei, that there must be an undiscovered resonance in the carbon-12 nucleus facilitating its synthesis in stellar interiors via the triple-alpha process. He then calculated the energy of this undiscovered resonance to be 7.6 million electronvolts. Willie Fowler's research group soon found this resonance, and its measured energy was close to Hoyle's prediction. However, in 2010 Helge Kragh argued that Hoyle did not use anthropic reasoning in making his prediction, since he made his prediction in 1953 and anthropic reasoning did not come into prominence until 1980. He called this an "anthropic myth," saying that Hoyle and others made an after-the-fact connection between carbon and life decades after the discovery of the resonance. Cosmic inflation Don Page criticized the entire theory of cosmic inflation as follows. He emphasized that initial conditions that made possible a thermodynamic arrow of time in a universe with a Big Bang origin, must include the assumption that at the initial singularity, the entropy of the universe was low and therefore extremely improbable. Paul Davies rebutted this criticism by invoking an inflationary version of the anthropic principle. While Davies accepted the premise that the initial state of the visible universe (which filled a microscopic amount of space before inflating) had to possess a very low entropy value—due to random quantum fluctuations—to account for the observed thermodynamic arrow of time, he deemed this fact an advantage for the theory. That the tiny patch of space from which our observable universe grew had to be extremely orderly, to allow the post-inflation universe to have an arrow of time, makes it unnecessary to adopt any "ad hoc" hypotheses about the initial entropy state, hypotheses other Big Bang theories require. String theory String theory predicts a large number of possible universes, called the "backgrounds" or "vacua". The set of these vacua is often called the "multiverse" or "anthropic landscape" or "string landscape". Leonard Susskind has argued that the existence of a large number of vacua puts anthropic reasoning on firm ground: only universes whose properties are such as to allow observers to exist are observed, while a possibly much larger set of universes lacking such properties go unnoticed. Steven Weinberg believes the Anthropic Principle may be appropriated by cosmologists committed to nontheism, and refers to that Principle as a "turning point" in modern science because applying it to the string landscape "may explain how the constants of nature that we observe can take values suitable for life without being fine-tuned by a benevolent creator". Others—most notably David Gross but also Lubos Motl, Peter Woit, and Lee Smolin—argue that this is not predictive. Max Tegmark, Mario Livio, and Martin Rees argue that only some aspects of a physical theory need be observable and/or testable for the theory to be accepted, and that many well-accepted theories are far from completely testable at present. Jürgen Schmidhuber (2000–2002) points out that Ray Solomonoff's theory of universal inductive inference and its extensions already provide a framework for maximizing our confidence in any theory, given a limited sequence of physical observations, and some prior distribution on the set of possible explanations of the universe. Dimensions of spacetime There are two kinds of dimensions: spatial (bidirectional) and temporal (unidirectional). Let the number of spatial dimensions be N and the number of temporal dimensions be T. That N = 3 and T = 1, setting aside the compactified dimensions invoked by string theory and undetectable to date, can be explained by appealing to the physical consequences of letting N differ from 3 and T differ from 1. The argument is often of an anthropic character and possibly the first of its kind, albeit before the complete concept came into vogue. The implicit notion that the dimensionality of the universe is special is first attributed to Gottfried Wilhelm Leibniz, who in the Discourse on Metaphysics suggested that the world is "the one which is at the same time the simplest in hypothesis and the richest in phenomena". Immanuel Kant argued that 3-dimensional space was a consequence of the inverse square law of universal gravitation. While Kant's argument is historically important, John D. Barrow said that it "gets the punch-line back to front: it is the three-dimensionality of space that explains why we see inverse-square force laws in Nature, not vice-versa" (Barrow 2002: 204). In 1920, Paul Ehrenfest showed that if there is only one time dimension and greater than three spatial dimensions, the orbit of a planet about its Sun cannot remain stable. The same is true of a star's orbit around the center of its galaxy. Ehrenfest also showed that if there are an even number of spatial dimensions, then the different parts of a wave impulse will travel at different speeds. If there are spatial dimensions, where k is a positive whole number, then wave impulses become distorted. In 1922, Hermann Weyl showed that Maxwell's theory of electromagnetism works only with three dimensions of space and one of time. Finally, Tangherlini showed in 1963 that when there are more than three spatial dimensions, electron orbitals around nuclei cannot be stable; electrons would either fall into the nucleus or disperse. Max Tegmark expands on the preceding argument in the following anthropic manner. If T differs from 1, the behavior of physical systems could not be predicted reliably from knowledge of the relevant partial differential equations. In such a universe, intelligent life capable of manipulating technology could not emerge. Moreover, if T > 1, Tegmark maintains that protons and electrons would be unstable and could decay into particles having greater mass than themselves. (This is not a problem if the particles have a sufficiently low temperature.) Lastly, if N < 3, gravitation of any kind becomes problematic, and the universe is probably too simple to contain observers. For example, when N < 3, nerves cannot cross without intersecting. Hence anthropic and other arguments rule out all cases except N = 3 and T = 1, which happens to describe the world around us. In 2019, James Scargill argued that complex life may be possible with two spatial dimensions. According to Scargill, a purely scalar theory of gravity may enable a local gravitational force, and 2D networks may be sufficient for complex neural networks. Metaphysical interpretations Some of the metaphysical disputes and speculations include, for example, attempts to back Pierre Teilhard de Chardin's earlier interpretation of the universe as being Christ centered (compare Omega Point), expressing a creatio evolutiva instead the elder notion of creatio continua. From a strictly secular, humanist perspective, it allows as well to put human beings back in the center, an anthropogenic shift in cosmology. Karl W. Giberson has laconically stated that William Sims Bainbridge disagreed with de Chardin's optimism about a future Omega Point at the end of history, arguing that logically we are trapped at the Omicron Point, in the middle of the Greek alphabet rather than advancing to the end, because the universe does not need to have any characteristics that would support our further technical progress, if the Anthropic principle merely requires it to be suitable for our evolution to this point. The Anthropic Cosmological Principle A thorough extant study of the anthropic principle is the book The Anthropic Cosmological Principle by John D. Barrow, a cosmologist, and Frank J. Tipler, a cosmologist and mathematical physicist. This book sets out in detail the many known anthropic coincidences and constraints, including many found by its authors. While the book is primarily a work of theoretical astrophysics, it also touches on quantum physics, chemistry, and earth science. An entire chapter argues that Homo sapiens is, with high probability, the only intelligent species in the Milky Way. The book begins with an extensive review of many topics in the history of ideas the authors deem relevant to the anthropic principle, because the authors believe that principle has important antecedents in the notions of teleology and intelligent design. They discuss the writings of Fichte, Hegel, Bergson, and Alfred North Whitehead, and the Omega Point cosmology of Teilhard de Chardin. Barrow and Tipler carefully distinguish teleological reasoning from eutaxiological reasoning; the former asserts that order must have a consequent purpose; the latter asserts more modestly that order must have a planned cause. They attribute this important but nearly always overlooked distinction to an obscure 1883 book by L. E. Hicks. Seeing little sense in a principle requiring intelligent life to emerge while remaining indifferent to the possibility of its eventual extinction, Barrow and Tipler propose the final anthropic principle (FAP): Intelligent information-processing must come into existence in the universe, and, once it comes into existence, it will never die out. Barrow and Tipler submit that the FAP is both a valid physical statement and "closely connected with moral values". FAP places strong constraints on the structure of the universe, constraints developed further in Tipler's The Physics of Immortality. One such constraint is that the universe must end in a Big Crunch, which seems unlikely in view of the tentative conclusions drawn since 1998 about dark energy, based on observations of very distant supernovas. In his review of Barrow and Tipler, Martin Gardner ridiculed the FAP by quoting the last two sentences of their book as defining a Completely Ridiculous Anthropic Principle (CRAP): Reception and controversies Carter has frequently regretted his own choice of the word "anthropic", because it conveys the misleading impression that the principle involves humans specifically, rather than intelligent observers in general. Others have criticised the word "principle" as being too grandiose to describe straightforward applications of selection effects. A common criticism of Carter's SAP is that it is an easy deus ex machina that discourages searches for physical explanations. To quote Penrose again: "[I]t tends to be invoked by theorists whenever they do not have a good enough theory to explain the observed facts." Carter's SAP and Barrow and Tipler's WAP have been dismissed as truisms or trivial tautologies—that is, statements true solely by virtue of their logical form and not because a substantive claim is made and supported by observation of reality. As such, they are criticized as an elaborate way of saying, "If things were different, they would be different," which is a valid statement, but does not make a claim of some factual alternative over another. Critics of the Barrow and Tipler SAP claim that it is neither testable nor falsifiable, and thus is not a scientific statement but rather a philosophical one. The same criticism has been leveled against the hypothesis of a multiverse, although some argue that it does make falsifiable predictions. A modified version of this criticism is that we understand so little about the emergence of life, especially intelligent life, that it is effectively impossible to calculate the number of observers in each universe. Also, the prior distribution of universes as a function of the fundamental constants is easily modified to get any desired result. Many criticisms focus on versions of the strong anthropic principle, such as Barrow and Tipler's anthropic cosmological principle, which are teleological notions that tend to describe the existence of life as a necessary prerequisite for the observable constants of physics. Similarly, Stephen Jay Gould, Michael Shermer, and others claim that the stronger versions of the anthropic principle seem to reverse known causes and effects. Gould compared the claim that the universe is fine-tuned for the benefit of our kind of life to saying that sausages were made long and narrow so that they could fit into modern hotdog buns, or saying that ships had been invented to house barnacles. These critics cite the vast physical, fossil, genetic, and other biological evidence consistent with life having been fine-tuned through natural selection to adapt to the physical and geophysical environment in which life exists. Life appears to have adapted to the universe, and not vice versa. Some applications of the anthropic principle have been criticized as an argument by lack of imagination, for tacitly assuming that carbon compounds and water are the only possible chemistry of life (sometimes called "carbon chauvinism", see also alternative biochemistry). The range of fundamental physical constants consistent with the evolution of carbon-based life may also be wider than those who advocate a fine tuned universe have argued. For instance, Harnik et al. propose a Weakless Universe in which the weak nuclear force is eliminated. They show that this has no significant effect on the other fundamental interactions, provided some adjustments are made in how those interactions work. However, if some of the fine-tuned details of our universe were violated, that would rule out complex structures of any kind—stars, planets, galaxies, etc. Lee Smolin has offered a theory designed to improve on the lack of imagination that anthropic principles have been accused of. He puts forth his fecund universes theory, which assumes universes have "offspring" through the creation of black holes whose offspring universes have values of physical constants that depend on those of the mother universe. The philosophers of cosmology John Earman, Ernan McMullin, and Jesús Mosterín contend that "in its weak version, the anthropic principle is a mere tautology, which does not allow us to explain anything or to predict anything that we did not already know. In its strong version, it is a gratuitous speculation". A further criticism by Mosterín concerns the flawed "anthropic" inference from the assumption of an infinity of worlds to the existence of one like ours: See also (an immediate precursor of the idea) (discussing the anthropic principle) (work of Alejandro Jenkins) Notes Footnotes References 5 chapters available online. Stenger, Victor J. (1999), "Anthropic design," The Skeptical Inquirer 23 (August 31, 1999): 40-43 Mosterín, Jesús (2005). "Anthropic Explanations in Cosmology." In P. Háyek, L. Valdés and D. Westerstahl (ed.), Logic, Methodology and Philosophy of Science, Proceedings of the 12th International Congress of the LMPS. London: King's College Publications, pp. 441–473. . A simple anthropic argument for why there are 3 spatial and 1 temporal dimensions. Shows that some of the common criticisms of AP based on its relationship with numerology or the theological Design Argument are wrong. External links Nick Bostrom: web site devoted to the Anthropic Principle. Friederich, Simon. Fine-tuning, review article of the discussion about fine-tuning, highlighting the role of the anthropic principles. Gijsbers, Victor. (2000). Theistic Anthropic Principle Refuted Positive Atheism Magazine. Chown, Marcus, Anything Goes, New Scientist, 6 June 1998. On Max Tegmark's work. Stephen Hawking, Steven Weinberg, Alexander Vilenkin, David Gross and Lawrence Krauss: Debate on Anthropic Reasoning Kavli-CERCA Conference Video Archive. Sober, Elliott R. 2009, "Absence of Evidence and Evidence of Absence -- Evidential Transitivity in Connection with Fossils, Fishing, Fine-Tuning, and Firing Squads." Philosophical Studies, 2009, 143: 63–90. "Anthropic Coincidence"—the anthropic controversy as a segue to Lee Smolin's theory of cosmological natural selection. Leonard Susskind and Lee Smolin debate the Anthropic Principle. debate among scientists on arxiv.org. Evolutionary Probability and Fine Tuning Benevolent Design and the Anthropic Principle at MathPages Critical review of "The Privileged Planet" The Anthropic Principle - a review. Berger, Daniel, 2002, "An impertinent résumé of the Anthropic Cosmological Principle." A critique of Barrow & Tipler. Jürgen Schmidhuber: Papers on algorithmic theories of everything and the Anthropic Principle's lack of predictive power. Paul Davies: Cosmic Jackpot Interview about the Anthropic Principle (starts at 40 min), 15 May 2007. Physical cosmology Concepts in epistemology Religion and science Principles Astronomical hypotheses

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https://en.wikipedia.org/wiki/Australian%20Army

Australian Army

The Australian Army is the principal land warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Royal Australian Air Force. The Army is commanded by the Chief of Army (CA), who is subordinate to the Chief of the Defence Force (CDF) who commands the ADF. The CA is also directly responsible to the Minister for Defence, with the Department of Defence administering the ADF and the Army. Formed in 1901, as the Commonwealth Military Forces, through the amalgamation of the colonial forces of Australia following the Federation of Australia. Although Australian soldiers have been involved in a number of minor and major conflicts throughout Australia's history, only during the Second World War has Australian territory come under direct attack. The Australian Army was initially composed almost completely of part–time soldiers, where the vast majority were in units of the Citizens Military Force (CMF or Militia) (1901–1980) during peacetime, with limits set on the regular Army. Since all reservists were barred from forcibly serving overseas, volunteer expeditionary forces (1st AIF, ANMEF, 2nd AIF) were formed to enable the Army to send large numbers of soldiers to serve overseas during periods of war. This period lasted from federation until post–1947, when a standing peacetime regular infantry force was formed and the Australian Army Reserve (1980–present) began to decline in importance. During its history, the Australian Army has fought in a number of major wars, including the Second Boer War, the First and Second World Wars, Korean War, Malayan Emergency, Indonesia-Malaysia Confrontation, Vietnam War, and more recently in Afghanistan and Iraq. Since 1947, the Australian Army has also been involved in many peacekeeping operations, usually under the auspices of the United Nations. Today, it participates in multilateral and unilateral military exercises and provides emergency disaster relief and humanitarian aid in response to domestic and international crises. History Formation Formed in March 1901, following federation, the Australian Army initially consisted of the six, disbanded and separate, colonial military forces' land components. Due to the Army being continuation of the colonial armies, it became immediately embroiled in conflict with the Second Boer War as contingents had been committed to fight for the United Kingdom of Great Britain and Ireland. The Army gained command of these contingents and even supplied federal units to reinforce their commitment at the request of the British government. The Defence Act 1903, established the operation and command structure of the Australian Army. In 1911, the Universal Service Scheme was implemented, introducing conscription for the first time in Australia, with males aged 14–26 assigned into cadet and CMF units; though the scheme did not prescribe or allow overseas service outside the states and territories of Australia. This restriction would be primarily, and continually, bypassed through the process of raising separate volunteer forces until the mid-20th century; this solution was not without its drawbacks, as it caused logistical dilemmas. World War I After the declaration of war on the Central Powers, the Australian Army raised the all volunteer First Australian Imperial Force (AIF) which had an initial recruitment of 52,561 out of a promised 20,000 men. A smaller expeditionary force, the Australian Naval and Military Expeditionary Force (ANMEF), dealt with the issue of the German Pacific holdings. ANMEF recruitment began on 10 August 1914, and operations started 10 days later. On 11 September, the ANMEF landed at Rabaul to secure German New Guinea, with no German outposts in the Pacific left by November 1914. During the AIF's preparations to depart Australia, the Ottoman Empire joined the Central Powers; thereby receiving declarations of war from the Allies of World War I in early November 1914. After initial recruitment and training, the AIF departed for Egypt where they underwent further preparations, and where the Australian and New Zealand Army Corps (ANZAC) was formed. Their presence in Egypt was due to the planned Gallipoli campaign, an invasion of the Ottoman Empire via Gallipoli. On 25 April, the AIF landed at ANZAC Cove, which signaled the start of Australia's contribution to the campaign. Following little initial success, fighting quickly devolved into trench warfare, which precipitated a stalemate. On 15 December 1915, after eight months of fighting, the evacuation of Gallipoli commenced; it was completed 5 days later with no casualties recorded. After regrouping in Egypt, the AIF was split into two groups and further expanded with reinforcements. This division would see a majority of the Australian Light Horse fight the Ottomans in Arabia and the Levant, whereas the rest of the AIF would go to the Western Front. Western Front The AIF arrived in France with the 1st, 2nd, 4th and 5th Divisions; which comprised, in part, I ANZAC Corps and, in full, II ANZAC Corps. The 3rd Division would not arrive until November 1916, as it underwent training in England after its transfer from Australia. In July 1916, the AIF commenced operations with the Battle of the Somme, and more specifically with the Attack at Fromelles. Soon after, the 1st, 2nd and 4th Divisions became tied down in actions at the Battle of Pozières and Mouquet Farm. In around six weeks, the operations caused 28,000 Australian casualties. Due to these losses and pressure from the United Kingdom to maintain the AIF's manpower, Prime Minister Billy Hughes introduced the first conscription plebiscite. It was defeated by a narrow margin and created a bitter divide on the issue of conscription throughout the 20th century. Following the German withdrawal to the Hindenburg Line in March 1917, which was better defended and eased manpower restraints, the first Australian assault on the Hindenburg Line occurred on 11 April 1917 with the First Battle of Bullecourt. On 20 September, the Australian contingent joined the Third Battle of Ypres with the Battle of Menin Road, and continued on to fight in the Battle of Polygon Wood, which lasted until 3 October; in total, these tow operations cost roughly 11,000 in Australian casualties. Until 15 November 1917, multiple attacks at the Battle of Broodseinde Ridge and the Battle of Passchendaele occurred, but, failed to take their objectives following the start of the rain and subsequent muddying of the fields. On 21 March 1918, the Germans attempted a breakout through the Michael Offensive, which was part of the much larger German spring offensive; the AIF suffered 15,000 casualties due to this effort. During this operation, Australian troops conducted a series of local defences and offensives to hold and retake Villers–Brettoneux over the period 4 to 25 April 1918. After the cessation of offensives by the German Army, the Australian Corps began participating in "Peaceful penetration" operations, which were localised raids designed to harass and gain small tracts of territory; these proved so effective that several major operational objectives were captured. On 4 July 1918, the Battle of Hamel saw the first successful use of tanks alongside Australians, with the battleplan of John Monash completed three minutes over the planned 90 minute operation. Following this success, the Battle of Amiens was launched on 8 August 1918, in conjunction with the Canadian Corps and the British III Corps, and concluded on 12 August 1918; General Erich Ludendorff described it as "the black day of the German Army". On 29 August 1918, following territorial advances and pursuits, the AIF attacked Pèronne and subsequently initiated the Battle of Mont St Quentin. Another operation around Épehy was planned for 18 September 1918, which aimed to retake the British trenches and, potentially, capture their most ambitious objective of the Hindenburg's outpost line – which they achieved. Following news of a three-month furlough for certain soldiers, seven AIF battalions were disbanded; consequently, members of these battalions mutinied. Soon after the penetration of the Hindenburg Line, plans for the breakthrough of the main trench, with the Australian Corps as the vanguard, were completed. However, due to manpower issues, only the 3rd and 5th Divisions participated, with the American Expeditionary Forces' 27th and 30th Divisions given as reinforcements. On 29 September, following a three day long bombardment, the Battle of the Hindenburg Line commenced, wherein the corps attacked and captured more of the line. On 5 October 1918, after furious fighting, the Australian Corps was withdrawn from the front, as the entire corps had been operating continuously since 8 August 1918. They would not return to the battlefield, as Germany signed the Armistice of 11 November 1918 that ultimately ended the war on the Western Front. Middle East The Australian mounted units, composed of the ANZAC Mounted Division and eventually the Australian Mounted Division, participated in the Sinai and Palestine campaign. They were originally stationed there to protect the Suez Canal from the Turks, and following the threat of its capture passing, they started offensive operations and helped in the re-conquest of the Sinai Desert. This was followed by the Battles of Gaza, wherein on the 31 October 1917 the 4th and 12th Light Horse took Beersheba through the last charge of the Light Horse. They continued on to capture Jerusalem on 10 December 1917 and then eventually Damascus on 1 October 1918 whereby, a few days later on 10 October 1918, the Ottoman Empire surrendered. Interwar years Repatriation efforts were implemented between the armistice and the end of 1919, which occurred after the disbandment of the Australian Imperial Force. In 1921, CMF units were renumbered to that of the AIF, to perpetuate the honours and numerical identities of the units involved in WW1. During this period there was a complacency towards matters of defence, due to the devastating effects of the previous war on the Australian psyche. Following the election of Prime Minister James Scullin in 1929, two events occurred that substantially affected the armed forces: conscription was abolished and the economic effects of the Great Depression started to be felt in Australia. The economic ramifications of the depression led to decisions that decreased defence expenditure and manpower for the army. Since conscription was repealed, to reflect the new volunteer nature of the Citizens Forces, the CMF was renamed to the Militia. World War II Following the declaration of war on Nazi Germany and her allies by the United Kingdom, and the subsequent confirmation by Prime Minister Robert Menzies on 3 September 1939, the Australian Army raised the Second Australian Imperial Force, a 20,000-strong volunteer expeditionary force, which initially consisted of the 6th Division; later increased to include the 7th and 9th Divisions, alongside the 8th Division which was sent to Singapore. In October 1939, compulsory military training recommenced for unmarried men aged 21, who had to complete three months of training. The 2nd AIF commenced its first operations in North Africa with Operation Compass, that began with the Battle of Bardia. This was followed by supplying Australian units to defend against the Axis in the Battle of Greece. After the evacuation of Greece, Australian troops took part in the Battle of Crete which, though more successful, still failed and another withdrawal was ordered. During the Greek Campaign, the Allies were pushed back to Egypt and the Siege of Tobruk began. Tobruk's primary defence personnel were Australians of the 9th Division; the so-called 'Rats of Tobruk'. Additionally, the AIF participated in the Syria–Lebanon campaign. The 9th Division fought in the First and Second Battle of El Alamein before also being shipped home to fight the Japanese. Pacific In December 1941, following the Bombing of Pearl Harbour, Australia declared war on Japan. The pace of Japan's subsequent conquest of Southeast Asia extremely concerned Australian policymakers. Consequently, the AIF was requested to return home, and the militia was mobilised. After the Fall of Singapore, and the consequent capture of the entire 8th Division as POWs, this concern only grew. These events hastened the relief of the Rats of Tobruk, while the other divisions were immediately recalled to reinforce New Guinea. General conscription was reintroduced, though service was again limited to Australian possessions; this earnt the Militia their epithet of "koalas". Tensions primarily arose between the AIF and Militia due to the CMF's perceived inferior fighting ability, leading to the nickname of "chocos/chocolate soldiers". The Imperial Japanese Navy's failure in the Battle of the Coral Sea, was the impetus for the Imperial Japanese Army to try to capture Port Moresby via the Owen Stanley Range. On 21 July 1942, the Japanese began the Kokoda Campaign after landing at Gona; attempts to defeat them by Australian battalions were met with eventual success. Resultant offensive operations concluded with the Japanese being driven out of New Guinea entirely. From 25 August 1942 to 7 September 1942, in parallel with these defences, the Battle of Milne Bay was waged. When the Japanese were repulsed, it was considered their first significant reversal for the war. In November 1942, the campaign ended after the Japanese withdrawal, with Australian advances leading to the Battle of Buna–Gona on 16 November 1942. In early 1943, the Salamaua–Lae campaign began, with operations against the entrenched Japanese aimed towards recapturing the eponymous towns. This culminated in the capture of Lae, held by the 7th Division in early September 1943, from a successful combined amphibious landing at Lae and an airborne landing at Nadzab. The seaborne assault was notable as it was the first large–scale amphibious operation since Gallipoli. Subsequently, Salamaua was taken days later on 11 September 1943, by a separate joint Australia–US attack. The Battle of Lae was additionally part of the wider Huon Peninsula campaign (September 1943 – January 1944). Following Lae's capture, the Battle of Finschhafen commenced with a relatively swift control of objectives, with subsequent Japanese counterattacks beaten off. On 17 November 1943, a major offensive that began with the Battle of Sattelberg, continued with the Battle of Wareo, and concluded with the Battle of Sio on 15 January 1944, was unleashed. The momentum of this advance was continued by the 8th Brigade, as they pursued the enemy in retreat, which culminated with the Battle of Madang. In mid-1944, Australian forces took over the garrisoning of Torokina from the US with this changeover giving Australian command responsibility over the Bougainville campaign. Soon after arriving in November of the same year, the commander of II Corps, Lieutenant-General Stanley Savige, began an offensive to retake the island with the 3rd Division alongside the 11th and 23rd Brigades. The campaign lasted until the Japanese surrender, with controversy surrounding its little apparent significance to the war's conclusion, and the number of casualties incurred; this was one of Australia's most costliest campaigns in the Second World War. In October 1944, Australian participation in the Aitape–Wewak campaign began with the replacement of US forces at Aitape with the Australian 6th Division. US forces had previously captured the position, and had held it passively, though Australian command found this unsuitable. On 2 November 1944, the 2/6th Cavalry Commando Regiment was tasked with patrolling the area, wherein minor engagements were reported. In early December, the commandos were sent inland to establish access to the Torricelli Range, while the 19th Brigade handled patrolling, consequently, the amount of fierce fighting and territory secured increased. Following this success, thought was given for the capture of Maprik and Wewak, though supply became a major issue in this period. On 10 February 1945, the campaign's major offensive was underway, which resulted in both falling in quick succession on 22 April 1945. Smaller operations to secure the area continued, and all significant actions ceased by July. The Borneo campaign was a series of three distinct amphibious operations that were undertaken by the 7th and 9th Divisions. The campaign began with the Battle of Tarakan on 1 May 1945, followed six weeks later by the Battle of Labuan, and concluded with the Battle of Balikpapan. The purpose of capturing Tarakan was to establish airfields, and the island was taken seven weeks following the initial amphibious landing. On 10 June 1945, the operation at Labuan commenced, and was tasked to secure resources and a naval base, and would continue until Japan's surrender. On 1 July 1945, the Balikpapan engagement commenced, with all major objectives being acquired by war's end; this operation remains the largest amphibious operation undertaken by Australian forces, with 33,000 Australian servicemen participating. On 15 August 1945, Japan surrendered, ending the Second World War. Cold War Postwar After the surrender of Japan, Australia provided a contingent to the British Commonwealth Occupation Force (BCOF) which included the 34th Brigade. The units that composed the brigade would eventually become the nucleus of the regular army, with the battalions and brigade being renumbered to reflect this change. Following the start of the Korean War, the Australian Army committed troops to fight against the North Korean forces; the units came from the Australian contribution to BCOF. The 3rd Battalion, Royal Australian Regiment (3RAR) arrived in Pusan on 28 September 1950. Australian troop numbers would increase and continue to be deployed up until the armistice, with 3RAR being eventually joined by the 1st Battalion, Royal Australian Regiment (1RAR). For a brief period, between 1951 and 1959, the Menzies Government reinstituted conscription and compulsory military training with the National Service Scheme, which required all males of eighteen years of age to serve for specified period in either the Australian Regular Army (ARA) or CMF. Irregular warfare In October 1955, the Australian Army committed the 2nd Battalion, Royal Australian Regiment (2RAR) in the Malayan Emergency, a guerrilla conflict between communist forces and the Federation of Malaya over ethnic Chinese citizenship. The operations consisted of patrolling actions and guarding infrastructure, though they rarely saw combat as the emergency was nearly over by the time of their deployment. All three original Royal Australian Regiment battalions would complete at least one tour before the end of operations. In August 1963, Australia ended deployments to Malaya, three years after the emergency's official end. In 1962, the Borneo Confrontation began, due to Indonesia's opposition to the formation of Malaysia. It was an undeclared war that entailed a series of border conflicts between Indonesian-backed forces and British–Malaysian allies. Initial Australian support in the conflict began, and continued throughout, with the training and supply of Malaysian troops; Australian soldiers were only used for combat in defensive operations. In January 1965, permission was granted for the deployment of 3RAR, with extensive operations conducted in Sarawak from March until their withdrawal in July 1965. The subsequent deployment of 4th Battalion, Royal Australian Regiment (4RAR), in April 1966, was less intensive, with the battalion withdrawn in August that year. This is not to mention the efforts of the Special Air Service Regiment and several other corps in the conflict. Vietnam War The Australian Army commenced its involvement in the Vietnam War by sending military advisors in 1962, which was then increased by sending in combat troops, specifically 1RAR, on 27 May 1965. Just before the official start of hostilities, the Australian Army was augmented with the reintroduction of conscription, which was based on a 'birthday ballot' selection process for all registered 20-year-old males. These men were required to register, unless they gave a legitimate reason for their exemption, else they faced penalties. This scheme would prove to be one of the most controversial implementations of conscription in Australia, with large protests against its adoption. In March 1966, the Australian Army increased its commitment again with the replacement of 1RAR with the 1st Australian Task Force, a force in which all nine battalions of the Royal Australian Regiment would serve. One of the heaviest actions of the war occurred in August 1966, with the Battle of Long Tan, wherein D Company, 6th Battalion, Royal Australian Regiment (6RAR) successfully fended off an enemy force, estimated at 2,000 men, for four hours. In 1968, Australian forces defended against the Tet Offensive, a Viet Cong military operation, and repulsed them with few casualties. The contribution of personnel to the war was gradually wound down, starting in late-1970 and ending in 1972; the official declaration of the end of Australia's involvement in the war was made on 11 January 1973. Post–Vietnam War Following the Vietnam War, there was an almost continuous hiatus of operational activity by the Australian Army. In late 1979, one of the largest deployments experienced by the Army during this period was its commitment of 151 troops to the Commonwealth Monitoring Force, which monitored the transition of Rhodesia to universal suffrage. In 1989, Australia offered 300 army personnel, mostly engineers, to the United Nations Transition Assistance Group (UNTAG) in Namibia, to help transition the country to independence from South Africa control. Recent history (1990–present) Peacekeeping Following the invasion of Kuwait by Iraq in August 1990, a coalition of countries sponsored by the United Nations Security Council, of which Australia was a part, gave a deadline for Iraq to withdraw from Kuwait of the 15 January 1991. Iraq refused to retreat and thus full conflict and the Gulf War began two days later on 17 January 1991. In January 1993, the Australian Army deployed 26 personnel on an ongoing rotational basis to the Multinational Force and Observers (MFO), as part of a non-United Nations peacekeeping organisation that observes and enforces the peace treaty between Israel and Egypt. Australia's largest peacekeeping deployment began in 1999 with the International Force for East Timor, while other ongoing operations include peacekeeping in the Sinai (as part of MFO), and the United Nations Truce Supervision Organization (as part of Operation Paladin since 1956). Humanitarian relief after the 2004 Indian Ocean earthquake in Aceh Province, Indonesia, Operation Sumatra Assist, ended on 24 March 2005. Afghanistan and Iraq Following the 11 September 2001 terrorist attacks, Australia promised troops to any military operations that the US commenced in response to the attacks. Subsequently, the Australian Army committed combat troops to Afghanistan in Operation Slipper. This combat role continued until the end of 2013 when it was replaced by a training contingent operating under Operation Highroad until 2021. After the Gulf War the UN imposed heavy restrictions on Iraq to stop them producing any Weapon of mass destruction. In the early 21st century, the US accused Iraq of possessing these weapons and promoted unsubstantiated allegations, and requested that the UN invade the country in response, a motion which Australia supported. The UN denied this motion, however, it did not stop a coalition, that Australia joined, invading the country; thus starting the Iraq War on 19 March 2003. Between April 2015 and June 2020, the Army deployed a 300-strong element to Iraq, designated as Task Group Taji, as part of Operation Okra. In support of a capacity building mission, Task Group Taji's main role was to provide training to Iraqi forces, during which Australian troops have served alongside counterparts from New Zealand. Organisation The 1st Division comprises a deployable headquarters, while the 2nd Division, under the command of Forces Command, is the main home-defence formation, containing Army Reserve units. The 2nd Division's headquarters only performs administrative functions. The Australian Army has not deployed a divisional-sized formation since 1945 and does not expect to do so in the future. 1st Division The 1st Division carries out high-level training activities and deploys to command large-scale ground operations. It has few combat units permanently assigned to it, although it does currently command the 2nd Battalion, Royal Australian Regiment as part of Australia's amphibious task group. Forces Command Forces Command controls for administrative purposes all non-special-forces assets of the Australian Army. It is neither an operational nor a deployable command. Forces Command comprises: 1 Brigade – Multi-role Combat Brigade based in Darwin and Adelaide. 3 Brigade – Multi-role Combat Brigade based in Townsville. 6 Brigade (CS&ISTAR) – Mixed brigade based in Sydney. 7 Brigade – Multi-role Combat Brigade based in Brisbane. 17 Sustainment Brigade – Logistic brigade based in Sydney. 2nd Division administers the reserve forces from its headquarters located in Sydney. 4 Brigade – based in Victoria. 5 Brigade – based in New South Wales. 8 Brigade – training brigade with units around Australia 9 Brigade – based in South Australia and Tasmania. 11 Brigade – based in Queensland. 13 Brigade – based in Western Australia. Additionally, Forces Command includes the following training establishments: Army Recruit Training Centre at Kapooka, NSW; Royal Military College, Duntroon in the ACT; Combined Arms Training Centre at Puckapunyal, Vic; and Army Logistic Training Centre at Bonegilla, Vic and Bandiana, Vic. Aviation Army Aviation Command is responsible for the Australian Army's helicopters and training, aviation safety and unmanned aerial vehicles (UAV). Army Aviation Command comprises: 16 Aviation Brigade – brigade based in Enoggera, Brisbane. Army Aviation Training Centre at Oakey, QLD. Special Forces Special Operations Command is a command formation of equal status to the other commands in the ADF and includes all of Army's special forces units. Special Operations Command comprises: Special Forces Group - a brigade-level headquarters. Colours, standards and guidons Infantry, and some other combat units of the Australian Army carry flags called the Queen's Colour and the Regimental Colour, known as "the Colours". Armoured units carry Standards and Guidons – flags smaller than Colours and traditionally carried by Cavalry, Lancer, Light Horse and Mounted Infantry units. The 1st Armoured Regiment is the only unit in the Australian Army to carry a Standard, in the tradition of heavy armoured units. Artillery units' guns are considered to be their Colours, and on parade are provided with the same respect. Non-combat units (combat service support corps) do not have Colours, as Colours are battle flags and so are only available to combat units. As a substitute, many have Standards or Banners. Units awarded battle honours have them emblazoned on their Colours, Standards and Guidons. They are a link to the unit's past and a memorial to the fallen. Artillery do not have Battle Honours – their single Honour is "Ubique" which means "Everywhere" – although they can receive Honour Titles. The Army is the guardian of the National Flag and as such, unlike the Royal Australian Air Force, does not have a flag or Colours. The Army, instead, has a banner, known as the Army Banner. To commemorate the centenary of the Army, the Governor General Sir William Deane, presented the Army with a new Banner at a parade in front of the Australian War Memorial on 10 March 2001. The banner was presented to the Regimental Sergeant Major of the Army (RSM-A), Warrant Officer Peter Rosemond. The Army Banner bears the Australian Coat of Arms on the obverse, with the dates "1901–2001" in gold in the upper hoist. The reverse bears the "rising sun" badge of the Australian Army, flanked by seven campaign honours on small gold-edged scrolls: South Africa, World War I, World War II, Korea, Malaya-Borneo, South Vietnam, and Peacekeeping. The banner is trimmed with gold fringe, has gold and crimson cords and tassels, and is mounted on a pike with the usual British royal crest finial. Personnel Strength As of June 2018 the Army had a strength of 47,338 personnel: 29,994 permanent (regular) and 17,346 active reservists (part-time); all of whom are volunteers. In addition, the Standby Reserve has another 12,496 members (as of 2009). As of 2018, women make up 14.3% of the Army – well on track to reach its current goal of 15% by 2023. The number of women in the Australian military has increased since 2011 (10%), with the announcement that women would be allowed to serve in frontline combat roles by 2016. Rank and insignia The ranks of the Australian Army are based on the ranks of the British Army, and carry mostly the same actual insignia. For officers the ranks are identical except for the shoulder title "Australia". The Non-Commissioned Officer insignia are the same up until Warrant Officer, where they are stylised for Australia (for example, using the Australian, rather than the British coat of arms). The ranks of the Australian Army are as follows: Uniforms The Australian Army uniforms are grouped into nine categories, with additional variants of the uniform having alphabetical suffixes in descending order, which each ranges from ceremonial dress to general service and battle dress. The Slouch hat is the regular service and general duties hat, while the field hat is for use near combat scenarios. The summarised categories are as follows: No 1 – Ceremonial Service Dress No 2 – Ceremonial Parade Dress/General Duty Dress No 3 – Ceremonial Safari Suit No 4 – Multicam Dress No 5 – Crewman Dress No 6 – Mess Dress No 7 – Working Dress No 8 – Maternity Dress No 9 – Aircrew Dress Equipment Firearms and artillery Vehicles Support Aircraft Bases The Army's operational headquarters, Forces Command, is located at Victoria Barracks in Sydney. The Australian Army's three regular brigades are based at Robertson Barracks near Darwin, Lavarack Barracks in Townsville, and Gallipoli Barracks in Brisbane. The Deployable Joint Force Headquarters is also located at Gallipoli Barracks. Other important Army bases include the Army Aviation Centre near Oakey, Queensland, Holsworthy Barracks near Sydney, Lone Pine Barracks in Singleton, New South Wales and Woodside Barracks near Adelaide, South Australia. The SASR is based at Campbell Barracks Swanbourne, a suburb of Perth, Western Australia. Puckapunyal, north of Melbourne, houses the Australian Army's Combined Arms Training Centre, Land Warfare Development Centre, and three of the five principal Combat Arms schools. Further barracks include Steele Barracks in Sydney, Keswick Barracks in Adelaide, and Irwin Barracks at Karrakatta in Perth. Dozens of Australian Army Reserve depots are located across Australia. Australian Army Journal Since June 1948, the Australian Army has published its own journal titled the Australian Army Journal. The journal's first editor was Colonel Eustace Keogh, and initially, it was intended to assume the role that the Army Training Memoranda had filled during the Second World War, although its focus, purpose, and format has shifted over time. Covering a broad range of topics including essays, book reviews and editorials, with submissions from serving members as well as professional authors, the journal's stated goal is to provide "...the primary forum for Army's professional discourse... [and to facilitate]... debate within the Australian Army ...[and raise] ...the quality and intellectual rigor of that debate by adhering to a strict and demanding standard of quality". In 1976, the journal was placed on hiatus as the Defence Force Journal began publication; however, publishing of the Australian Army Journal began again in 1999 and since then the journal has been published largely on a quarterly basis, with only minimal interruptions. See also Australian Defence Force ranks and insignia Australian military slang Battle and theatre honours of the Australian Army Conscription in Australia List of Australian military memorials List of military weapons of Australia References Citations Notes Bibliography Further reading External links Australian Army website 1901 establishments in Australia Cold War history of Australia

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https://en.wikipedia.org/wiki/American%20Registry%20for%20Internet%20Numbers

American Registry for Internet Numbers

The American Registry for Internet Numbers (ARIN) is the regional Internet registry for Canada, the United States, and many Caribbean and North Atlantic islands. ARIN manages the distribution of Internet number resources, including IPv4 and IPv6 address space and AS numbers. ARIN opened for business on December 22, 1997 after incorporating on April 18, 1997. ARIN is a nonprofit corporation with headquarters in Chantilly, Virginia, United States.<ref>"Chantilly CDP, Virginia ." U.S. Census Bureau. Retrieved on September 16, 2009.</ref> ARIN is one of five regional Internet registries in the world. Like the other regional Internet registries, ARIN: Provides services related to the technical coordination and management of Internet number resources Facilitates policy development by its members and stakeholders Participates in the international Internet community Is a nonprofit, community-based organization Is governed by an executive board elected by its membership Services ARIN provides services related to the technical coordination and management of Internet number resources. The nature of these services is described in ARIN's mission statement:Applying the principles of stewardship, ARIN, a nonprofit corporation, allocates Internet Protocol resources; develops consensus-based policies; and facilitates the advancement of the Internet through information and educational outreach.These services are grouped in three areas: Registration, Organization, and Policy Development. Registration services Registration services pertain to the technical coordination and inventory management of Internet number resources. Services include: IPv4 address allocation and assignment IPv6 address allocation and assignment AS number assignment Directory services including: Registration transaction information (WHOIS) Routing information (Internet routing registry) DNS (Reverse) For information on requesting Internet number resources from ARIN, see https://www.arin.net/resources/index.html. This section includes the request templates, specific distribution policies, and guidelines for requesting and managing Internet number resources. Organization services Organization services pertain to interaction between stakeholders, ARIN members, and ARIN. Services include: Elections Members meetings Information publication and dissemination Education and training Policy development services Policy development services facilitate the development of policy for the technical coordination and management of Internet number resources. All ARIN policies are set by the community. Everyone is encouraged to participate in the policy development process at public policy meetings and on the Public Policy Mailing List. The ARIN Board of Trustees ratifies policies only after: discussion on mailing lists and at meetings; ARIN Advisory Council recommendation; community consensus in favor of the policy; and full legal and fiscal review. Membership is not required to participate in ARIN's policy development process or to apply for Internet number resources. Services include: Maintaining discussion e-mail lists Conducting public policy meetings Publishing policy documents Organizational structure ARIN consists of the Internet community within its region, its members, a 7-member Board of Trustees, a 15-member Advisory Council, and a professional staff of about 50. The board of trustees and Advisory Council are elected by ARIN members for three-year terms. Board of Trustees The ARIN membership elects the Board of Trustees (BoT), which has ultimate responsibility for the business affairs and financial health of ARIN, and manages ARIN's operations in a manner consistent with the guidance received from the Advisory Council and the goals set by the registry's members. The BoT is responsible for determining the disposition of all revenues received to ensure all services are provided in an equitable manner. The BoT ratifies proposals generated from the membership and submitted through the Advisory Council. Executive decisions are carried out following approval by the BoT. The BoT consists of 7 members consisting of a President and CEO, a chairman, a Treasurer, and others. Advisory Council In addition to the BoT, ARIN has an advisory council that advises ARIN and the BoT on IP address allocation policy and related matters. Adhering to the procedures in the Internet Resource Policy Evaluation Process, the advisory council forwards consensus-based policy proposals to the BoT for ratification. The advisory council consists of 15 elected members consisting of a Chair, Vice Chair, and others. History The organization was formed in December 1997 to "provide IP registration services as an independent, nonprofit corporation." Until this time, IP address registration (outside of RIPE and APNIC regions) was done in accordance with policies set by the IETF by Network Solutions corporation as part of the InterNIC project. The National Science Foundation approved the plan for the creation of the not-for-profit organization to "give the users of IP numbers (mostly Internet service providers, corporations and other large institutions) a voice in the policies by which they are managed and allocated within the North American region."''. As part of the transition, Network Solutions corporation transitioned these tasks as well as initial staff and computer infrastructure to ARIN. The initial Board of Trustees consisted of Scott Bradner, John Curran, Kim Hubbard, Don Telage, Randy Bush, Raymundo Vega Aguilar, and Jon Postel (IANA) as an ex-officio member. The first president of ARIN was Kim Hubbard, from 1997 until 2000. Kim was succeeded by Raymond "Ray" Plzak until the end of 2008. Trustee John Curran was acting president until July 1 of 2009 when he assumed the CEO role permanently. Until late 2002 it served Mexico, Central America, South America and all of the Caribbean. LACNIC now handles parts of the Caribbean, Mexico, Central America, and South America. Also, Sub-Saharan Africa was part of its region until April 2005, when AfriNIC was officially recognized by ICANN as the fifth regional Internet registry. On 24 September 2015 ARIN has declared exhaustion of the ARIN IPv4 addresses pool. Service region The countries in the ARIN service region are: Former service regions ARIN formerly covered Angola, Botswana, Burundi, Republic of Congo, Democratic Republic of Congo, Lesotho, Malawi, Mozambique, Namibia, Rwanda, South Africa, Swaziland, Tanzania, Zambia, and Zimbabwe until AfriNIC was formed. ARIN formerly covered Argentina, Aruba, Belize, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Dutch West Indies, Ecuador, El Salvador, Falkland Islands (UK), French Guiana, Guatemala, Guyana, Haiti, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, South Georgia and the South Sandwich Islands, Suriname, Trinidad and Tobago, Uruguay, and Venezuela until LACNIC was formed. References External links ARIN Home Page Regional Internet registries Internet in Canada Internet in the United States Internet exchange points in North America

2800

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

Asimov (disambiguation)

Isaac Asimov (1920–1992) was a writer. Asimov may also refer to: Places Asimov (crater), an impact crater on Mars, named after Isaac Asimov 5020 Asimov, an asteroid named after Isaac Asimov Other Asimov (surname) Asimov's Science Fiction, an American science fiction magazine named after Isaac Asimov Asimov's SF Adventure Magazine, a short-lived American science fiction magazine named after Isaac Asimov Isaac Asimov Awards, four separate awards established in honor of Isaac Asimov See also ASIMO Azimov, Russian last name

2802

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

Akihabara

is a common name for the area around Akihabara Station in the Chiyoda ward of Tokyo, Japan. Administratively, the area called Akihabara mainly belongs to the and Kanda-Sakumachō districts in Chiyoda. There exists an administrative district called Akihabara in the Taitō ward further north of Akihabara Station, but it is not the place people generally refer to as Akihabara. The name Akihabara is a shortening of , which ultimately comes from , named after a fire-controlling deity of a firefighting shrine built after the area was destroyed by a fire in 1869. Akihabara gained the nickname shortly after World War II for being a major shopping center for household electronic goods and the post-war black market. Akihabara is considered by many to be the centre of modern Japanese popular culture and a major shopping district for video games, anime, manga, electronics and computer-related goods. Icons from popular anime and manga are displayed prominently on the shops in the area, and numerous maid cafés and some arcades are found throughout the district. Geography The main area of Akihabara is located on a street just west of Akihabara Station, where most of the major shops are situated. Most of the electronics shops are just west of the station, and the anime and manga shops and the cosplay cafés are north of them. As mentioned above, the area called Akihabara now ranges over some districts in Chiyoda ward: , , and . There exists an administrative district called Akihabara in the Taitō ward further north of the station, but it is not the place which people generally refer to as Akihabara. It borders on Sotokanda in between Akihabara and Okachimachi stations, but is half occupied by JR tracks. History The area that is now Akihabara was once near a city gate of Edo and served as a passage between the city and northwestern Japan. This made the region a home to many craftsmen and tradesmen, as well as some low-class samurai. One of Tokyo's frequent fires destroyed the area in 1869, and the people decided to replace the buildings of the area with a shrine called Chinkasha (now known as ), meaning fire extinguisher shrine, in an attempt to prevent the spread of future fires. The locals nicknamed the shrine Akiba after the deity that could control fire, and the area around it became known as Akibagahara and later Akihabara. After Akihabara Station was built in 1888, the shrine was moved to the Taitō ward where it still resides today. Since its opening in 1890, Akihabara Station became a major freight transit point, which allowed a vegetable and fruit market to spring up in the district. Then, in the 1920s, the station saw a large volume of passengers after opening for public transport, and after World War II, the black market thrived in the absence of a strong government. This disconnection of Akihabara from government authority has allowed the district to grow as a market city and given rise to an excellent atmosphere for entrepreneurship. In the 1930s, this climate turned Akihabara into a future-oriented market region specializing in household electronics, such as washing machines, refrigerators, televisions, and stereos, earning Akihabara the nickname "Electric Town". As household electronics began to lose their futuristic appeal in the 1980s, the shops of Akihabara shifted their focus to home computers at a time when they were only used by specialists and hobbyists. This new specialization brought in a new type of consumer, computer nerds or otaku. The market in Akihabara naturally latched onto their new customer base that was focused on anime, manga, and video games. The connection between Akihabara and otaku has survived and grown to the point that the region is now known worldwide as a center for otaku culture, and some otaku even consider Akihabara to be a sacred place. Otaku culture The influence of otaku culture has shaped Akihabara's businesses and buildings to reflect the interests of otaku and gained the district worldwide fame for its distinctive imagery. Akihabara tries to create an atmosphere as close as possible to the game and anime worlds of customers' interest. The streets of Akihabara are covered with anime and manga icons, and cosplayers line the sidewalks handing out advertisements, especially for maid cafés. Release events, special events, and conventions in Akihabara give anime and manga fans frequent opportunities to meet the creators of the works they follow and strengthen the connection between the region and otaku culture. The design of many of the buildings serves to create the sort of atmosphere that draws in otaku. Architects design the stores of Akihabara to be more opaque and closed to reflect the general desire of many otaku to live in their anime worlds rather than display their interests to the world at large. Akihabara's role as a free market has also allowed a large amount of amateur work to find a passionate audience in the otaku who frequent the area. Doujinshi (amateur or fanmade manga based on an anime/manga/game) has been growing in Akihabara since the 1970s when publishers began to drop manga that were not ready for large markets. Comiket is largest spot sale of Doujinshi in Japan. See also Akiba-kei Akihabara Trilogy Kanda Shrine, Shinto shrine near Akihabara Nipponbashi, in Osaka Ōsu, in Nagoya Tourism in Japan References External links Akihabara Area Tourism Organization Akihabara Electrical Town Organization website Go Tokyo Akihabara Guide Chiyoda, Tokyo Electronics districts Neighborhoods of Tokyo Otaku Shopping districts and streets in Japan Taitō Tourist attractions in Tokyo

2807

https://en.wikipedia.org/wiki/Active%20Directory

Active Directory

Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. It is included in most Windows Server operating systems as a set of processes and services. Initially, Active Directory was used only for centralized domain management. However, Active Directory eventually became an umbrella title for a broad range of directory-based identity-related services. A server running the Active Directory Domain Service (AD DS) role is called a domain controller. It authenticates and authorizes all users and computers in a Windows domain type network, assigning and enforcing security policies for all computers, and installing or updating software. For example, when a user logs into a computer that is part of a Windows domain, Active Directory checks the submitted username and password and determines whether the user is a system administrator or normal user. Also, it allows management and storage of information, provides authentication and authorization mechanisms, and establishes a framework to deploy other related services: Certificate Services, Active Directory Federation Services, Lightweight Directory Services, and Rights Management Services. Active Directory uses Lightweight Directory Access Protocol (LDAP) versions 2 and 3, Microsoft's version of Kerberos, and DNS. History Like many information-technology efforts, Active Directory originated out of a democratization of design using Request for Comments (RFCs). The Internet Engineering Task Force (IETF), which oversees the RFC process, has accepted numerous RFCs initiated by widespread participants. For example, LDAP underpins Active Directory. Also X.500 directories and the Organizational Unit preceded the Active Directory concept that makes use of those methods. The LDAP concept began to emerge even before the founding of Microsoft in April 1975, with RFCs as early as 1971. RFCs contributing to LDAP include RFC 1823 (on the LDAP API, August 1995), RFC 2307, RFC 3062, and RFC 4533. Microsoft previewed Active Directory in 1999, released it first with Windows 2000 Server edition, and revised it to extend functionality and improve administration in Windows Server 2003. Active Directory support was also added to Windows 95, Windows 98 and Windows NT 4.0 via patch, with some features being unsupported. Additional improvements came with subsequent versions of Windows Server. In Windows Server 2008, additional services were added to Active Directory, such as Active Directory Federation Services. The part of the directory in charge of management of domains, which was previously a core part of the operating system, was renamed Active Directory Domain Services (ADDS) and became a server role like others. "Active Directory" became the umbrella title of a broader range of directory-based services. According to Byron Hynes, everything related to identity was brought under Active Directory's banner. Active Directory Services Active Directory Services consist of multiple directory services. The best known is Active Directory Domain Services, commonly abbreviated as AD DS or simply AD. Domain Services Active Directory Domain Services (AD DS) is the foundation stone of every Windows domain network. It stores information about members of the domain, including devices and users, verifies their credentials and defines their access rights. The server running this service is called a domain controller. A domain controller is contacted when a user logs into a device, accesses another device across the network, or runs a line-of-business Metro-style app sideloaded into a device. Other Active Directory services (excluding LDS, as described below) as well as most of Microsoft server technologies rely on or use Domain Services; examples include Group Policy, Encrypting File System, BitLocker, Domain Name Services, Remote Desktop Services, Exchange Server and SharePoint Server. The self-managed AD DS must not be confused with managed Azure AD DS, which is a cloud product. Lightweight Directory Services Active Directory Lightweight Directory Services (AD LDS), formerly known as Active Directory Application Mode (ADAM), is an implementation of LDAP protocol for AD DS. AD LDS runs as a service on Windows Server. AD LDS shares the code base with AD DS and provides the same functionality, including an identical API, but does not require the creation of domains or domain controllers. It provides a Data Store for storage of directory data and a Directory Service with an LDAP Directory Service Interface. Unlike AD DS, however, multiple AD LDS instances can run on the same server. Certificate Services Active Directory Certificate Services (AD CS) establishes an on-premises public key infrastructure. It can create, validate and revoke public key certificates for internal uses of an organization. These certificates can be used to encrypt files (when used with Encrypting File System), emails (per S/MIME standard), and network traffic (when used by virtual private networks, Transport Layer Security protocol or IPSec protocol). AD CS predates Windows Server 2008, but its name was simply Certificate Services. AD CS requires an AD DS infrastructure. Federation Services Active Directory Federation Services (AD FS) is a single sign-on service. With an AD FS infrastructure in place, users may use several web-based services (e.g. internet forum, blog, online shopping, webmail) or network resources using only one set of credentials stored at a central location, as opposed to having to be granted a dedicated set of credentials for each service. AD FS uses many popular open standards to pass token credentials such as SAML, OAuth or OpenID Connect. AD FS supports encryption and signing of SAML assertions. AD FS's purpose is an extension of that of AD DS: The latter enables users to authenticate with and use the devices that are part of the same network, using one set of credentials. The former enables them to use the same set of credentials in a different network. As the name suggests, AD FS works based on the concept of federated identity. AD FS requires an AD DS infrastructure, although its federation partner may not. Rights Management Services Active Directory Rights Management Services (AD RMS, known as Rights Management Services or RMS before Windows Server 2008) is a server software for information rights management shipped with Windows Server. It uses encryption and a form of selective functionality denial for limiting access to documents such as corporate e-mails, Microsoft Word documents, and web pages, and the operations authorized users can perform on them. These operations can include viewing, editing, copying, saving as or printing for example. IT administrators can create pre-set templates for the convenience of the end user if required. However, end users can still define who can access the content in question and set what they can do. Logical structure As a directory service, an Active Directory instance consists of a database and corresponding executable code responsible for servicing requests and maintaining the database. The executable part, known as Directory System Agent, is a collection of Windows services and processes that run on Windows 2000 and later. Objects in Active Directory databases can be accessed via LDAP, ADSI (a component object model interface), messaging API and Security Accounts Manager services. Objects Active Directory structures are arrangements of information about objects. The objects fall into two broad categories: resources (e.g., printers) and security principals (user or computer accounts and groups). Security principals are assigned unique security identifiers (SIDs). Each object represents a single entity—whether a user, a computer, a printer, or a group—and its attributes. Certain objects can contain other objects. An object is uniquely identified by its name and has a set of attributes—the characteristics and information that the object represents— defined by a schema, which also determines the kinds of objects that can be stored in Active Directory. The schema object lets administrators extend or modify the schema when necessary. However, because each schema object is integral to the definition of Active Directory objects, deactivating or changing these objects can fundamentally change or disrupt a deployment. Schema changes automatically propagate throughout the system. Once created, an object can only be deactivated—not deleted. Changing the schema usually requires planning. Forests, trees, and domains The Active Directory framework that holds the objects can be viewed at a number of levels. The forest, tree, and domain are the logical divisions in an Active Directory network. Within a deployment, objects are grouped into domains. The objects for a single domain are stored in a single database (which can be replicated). Domains are identified by their DNS name structure, the namespace. A domain is defined as a logical group of network objects (computers, users, devices) that share the same Active Directory database. A tree is a collection of one or more domains and domain trees in a contiguous namespace, and is linked in a transitive trust hierarchy. At the top of the structure is the forest. A forest is a collection of trees that share a common global catalog, directory schema, logical structure, and directory configuration. The forest represents the security boundary within which users, computers, groups, and other objects are accessible. Organizational units The objects held within a domain can be grouped into organizational units (OUs). OUs can provide hierarchy to a domain, ease its administration, and can resemble the organization's structure in managerial or geographical terms. OUs can contain other OUs—domains are containers in this sense. Microsoft recommends using OUs rather than domains for structure and to simplify the implementation of policies and administration. The OU is the recommended level at which to apply group policies, which are Active Directory objects formally named group policy objects (GPOs), although policies can also be applied to domains or sites (see below). The OU is the level at which administrative powers are commonly delegated, but delegation can be performed on individual objects or attributes as well. Organizational units do not each have a separate namespace. As a consequence, for compatibility with Legacy NetBios implementations, user accounts with an identical sAMAccountName are not allowed within the same domain even if the accounts objects are in separate OUs. This is because sAMAccountName, a user object attribute, must be unique within the domain. However, two users in different OUs can have the same common name (CN), the name under which they are stored in the directory itself such as "fred.staff-ou.domain" and "fred.student-ou.domain", where "staff-ou" and "student-ou" are the OUs. In general the reason for this lack of allowance for duplicate names through hierarchical directory placement is that Microsoft primarily relies on the principles of NetBIOS, which is a flat-namespace method of network object management that, for Microsoft software, goes all the way back to Windows NT 3.1 and MS-DOS LAN Manager. Allowing for duplication of object names in the directory, or completely removing the use of NetBIOS names, would prevent backward compatibility with legacy software and equipment. However, disallowing duplicate object names in this way is a violation of the LDAP RFCs on which Active Directory is supposedly based. As the number of users in a domain increases, conventions such as "first initial, middle initial, last name" (Western order) or the reverse (Eastern order) fail for common family names like Li (李), Smith or Garcia. Workarounds include adding a digit to the end of the username. Alternatives include creating a separate ID system of unique employee/student ID numbers to use as account names in place of actual users' names, and allowing users to nominate their preferred word sequence within an acceptable use policy. Because duplicate usernames cannot exist within a domain, account name generation poses a significant challenge for large organizations that cannot be easily subdivided into separate domains, such as students in a public school system or university who must be able to use any computer across the network. Shadow groups In Microsoft's Active Directory, OUs do not confer access permissions, and objects placed within OUs are not automatically assigned access privileges based on their containing OU. This is a design limitation specific to Active Directory. Other competing directories such as Novell NDS are able to assign access privileges through object placement within an OU. Active Directory requires a separate step for an administrator to assign an object in an OU as a member of a group also within that OU. Relying on OU location alone to determine access permissions is unreliable, because the object may not have been assigned to the group object for that OU. A common workaround for an Active Directory administrator is to write a custom PowerShell or Visual Basic script to automatically create and maintain a user group for each OU in their directory. The scripts are run periodically to update the group to match the OU's account membership, but are unable to instantly update the security groups anytime the directory changes, as occurs in competing directories where security is directly implemented into the directory itself. Such groups are known as shadow groups. Once created, these shadow groups are selectable in place of the OU in the administrative tools. Microsoft refers to shadow groups in the Server 2008 Reference documentation, but does not explain how to create them. There are no built-in server methods or console snap-ins for managing shadow groups. The division of an organization's information infrastructure into a hierarchy of one or more domains and top-level OUs is a key decision. Common models are by business unit, by geographical location, by IT Service, or by object type and hybrids of these. OUs should be structured primarily to facilitate administrative delegation, and secondarily, to facilitate group policy application. Although OUs form an administrative boundary, the only true security boundary is the forest itself and an administrator of any domain in the forest must be trusted across all domains in the forest. Partitions The Active Directory database is organized in partitions, each holding specific object types and following a specific replication pattern. Microsoft often refers to these partitions as 'naming contexts'. The 'Schema' partition contains the definition of object classes and attributes within the Forest. The 'Configuration' partition contains information on the physical structure and configuration of the forest (such as the site topology). Both replicate to all domains in the Forest. The 'Domain' partition holds all objects created in that domain and replicates only within its domain. Physical structure Sites are physical (rather than logical) groupings defined by one or more IP subnets. AD also holds the definitions of connections, distinguishing low-speed (e.g., WAN, VPN) from high-speed (e.g., LAN) links. Site definitions are independent of the domain and OU structure and are common across the forest. Sites are used to control network traffic generated by replication and also to refer clients to the nearest domain controllers (DCs). Microsoft Exchange Server 2007 uses the site topology for mail routing. Policies can also be defined at the site level. Physically, the Active Directory information is held on one or more peer domain controllers, replacing the NT PDC/BDC model. Each DC has a copy of the Active Directory. Servers joined to Active Directory that are not domain controllers are called Member Servers. A subset of objects in the domain partition replicate to domain controllers that are configured as global catalogs. Global catalog (GC) servers provide a global listing of all objects in the Forest. Global Catalog servers replicate to themselves all objects from all domains and, hence, provide a global listing of objects in the forest. However, to minimize replication traffic and keep the GC's database small, only selected attributes of each object are replicated. This is called the partial attribute set (PAS). The PAS can be modified by modifying the schema and marking attributes for replication to the GC. Earlier versions of Windows used NetBIOS to communicate. Active Directory is fully integrated with DNS and requires TCP/IP—DNS. To be fully functional, the DNS server must support SRV resource records, also known as service records. Replication Active Directory synchronizes changes using multi-master replication. Replication by default is 'pull' rather than 'push', meaning that replicas pull changes from the server where the change was effected. The Knowledge Consistency Checker (KCC) creates a replication topology of site links using the defined sites to manage traffic. Intra-site replication is frequent and automatic as a result of change notification, which triggers peers to begin a pull replication cycle. Inter-site replication intervals are typically less frequent and do not use change notification by default, although this is configurable and can be made identical to intra-site replication. Each link can have a 'cost' (e.g., DS3, T1, ISDN etc.) and the KCC alters the site link topology accordingly. Replication may occur transitively through several site links on same-protocol site link bridges, if the cost is low, although KCC automatically costs a direct site-to-site link lower than transitive connections. Site-to-site replication can be configured to occur between a bridgehead server in each site, which then replicates the changes to other DCs within the site. Replication for Active Directory zones is automatically configured when DNS is activated in the domain based by site. Replication of Active Directory uses Remote Procedure Calls (RPC) over IP (RPC/IP). Between Sites SMTP can be used for replication, but only for changes in the Schema, Configuration, or Partial Attribute Set (Global Catalog) GCs. SMTP cannot be used for replicating the default Domain partition. Implementation In general, a network utilizing Active Directory has more than one licensed Windows server computer. Backup and restore of Active Directory is possible for a network with a single domain controller, but Microsoft recommends more than one domain controller to provide automatic failover protection of the directory. Domain controllers are also ideally single-purpose for directory operations only, and should not run any other software or role. Certain Microsoft products such as SQL Server and Exchange can interfere with the operation of a domain controller, necessitating isolation of these products on additional Windows servers. Combining them can make configuration or troubleshooting of either the domain controller or the other installed software more difficult. A business intending to implement Active Directory is therefore recommended to purchase a number of Windows server licenses, to provide for at least two separate domain controllers, and optionally, additional domain controllers for performance or redundancy, a separate file server, a separate Exchange server, a separate SQL Server, and so forth to support the various server roles. Physical hardware costs for the many separate servers can be reduced through the use of virtualization, although for proper failover protection, Microsoft recommends not running multiple virtualized domain controllers on the same physical hardware. Database The Active-Directory database, the directory store, in Windows 2000 Server uses the JET Blue-based Extensible Storage Engine (ESE98) and is limited to 16 terabytes and 2 billion objects (but only 1 billion security principals) in each domain controller's database. Microsoft has created NTDS databases with more than 2 billion objects. (NT4's Security Account Manager could support no more than 40,000 objects). Called NTDS.DIT, it has two main tables: the data table and the link table. Windows Server 2003 added a third main table for security descriptor single instancing. Programs may access the features of Active Directory via the COM interfaces provided by Active Directory Service Interfaces. Trusting To allow users in one domain to access resources in another, Active Directory uses trusts. Trusts inside a forest are automatically created when domains are created. The forest sets the default boundaries of trust, and implicit, transitive trust is automatic for all domains within a forest. Terminology One-way trust One domain allows access to users on another domain, but the other domain does not allow access to users on the first domain. Two-way trust Two domains allow access to users on both domains. Trusted domain The domain that is trusted; whose users have access to the trusting domain. Transitive trust A trust that can extend beyond two domains to other trusted domains in the forest. Intransitive trust A one way trust that does not extend beyond two domains. Explicit trust A trust that an admin creates. It is not transitive and is one way only. Cross-link trust An explicit trust between domains in different trees or in the same tree when a descendant/ancestor (child/parent) relationship does not exist between the two domains. Shortcut Joins two domains in different trees, transitive, one- or two-way. Forest trust Applies to the entire forest. Transitive, one- or two-way. Realm Can be transitive or nontransitive (intransitive), one- or two-way. External Connect to other forests or non-AD domains. Nontransitive, one- or two-way. PAM trust A one-way trust used by Microsoft Identity Manager from a (possibly low-level) production forest to a (Windows Server 2016 functionality level) 'bastion' forest, which issues time-limited group memberships. Management solutions Microsoft Active Directory management tools include: Active Directory Administrative Center (Introduced with Windows Server 2012 and above), Active Directory Users and Computers, Active Directory Domains and Trusts, Active Directory Sites and Services, ADSI Edit, Local Users and Groups, Active Directory Schema snap-ins for Microsoft Management Console (MMC), SysInternals ADExplorer These management tools may not provide enough functionality for efficient workflow in large environments. Some third-party solutions extend the administration and management capabilities. They provide essential features for a more convenient administration processes, such as automation, reports, integration with other services, etc. Unix integration Varying levels of interoperability with Active Directory can be achieved on most Unix-like operating systems (including Unix, Linux, Mac OS X or Java and Unix-based programs) through standards-compliant LDAP clients, but these systems usually do not interpret many attributes associated with Windows components, such as Group Policy and support for one-way trusts. Third parties offer Active Directory integration for Unix-like platforms, including: PowerBroker Identity Services, formerly Likewise (BeyondTrust, formerly Likewise Software) – Allows a non-Windows client to join Active Directory ADmitMac (Thursby Software Systems) Samba (free software under GPLv3) – Can act as a domain controller The schema additions shipped with Windows Server 2003 R2 include attributes that map closely enough to RFC 2307 to be generally usable. The reference implementation of RFC 2307, nss_ldap and pam_ldap provided by PADL.com, support these attributes directly. The default schema for group membership complies with RFC 2307bis (proposed). Windows Server 2003 R2 includes a Microsoft Management Console snap-in that creates and edits the attributes. An alternative option is to use another directory service as non-Windows clients authenticate to this while Windows Clients authenticate to AD. Non-Windows clients include 389 Directory Server (formerly Fedora Directory Server, FDS), ViewDS Identity Solutions - ViewDS v7.2 XML Enabled Directory and Sun Microsystems Sun Java System Directory Server. The latter two both being able to perform two-way synchronization with AD and thus provide a "deflected" integration. Another option is to use OpenLDAP with its translucent overlay, which can extend entries in any remote LDAP server with additional attributes stored in a local database. Clients pointed at the local database see entries containing both the remote and local attributes, while the remote database remains completely untouched. Administration (querying, modifying, and monitoring) of Active Directory can be achieved via many scripting languages, including PowerShell, VBScript, JScript/JavaScript, Perl, Python, and Ruby. Free and non-free AD administration tools can help to simplify and possibly automate AD management tasks. Since October 2017 Amazon AWS offers integration with Microsoft Active Directory. See also AGDLP (implementing role based access controls using nested groups) Apple Open Directory Flexible single master operation FreeIPA List of LDAP software System Security Services Daemon (SSSD) Univention Corporate Server References External links Microsoft Technet: White paper: Active Directory Architecture (Single technical document that gives an overview about Active Directory.) Microsoft Technet: Detailed description of Active Directory on Windows Server 2003 Microsoft MSDN Library: [MS-ADTS]: Active Directory Technical Specification (part of the Microsoft Open Specification Promise) Active Directory Application Mode (ADAM) Microsoft MSDN: [AD-LDS]: Active Directory Lightweight Directory Services Microsoft TechNet: [AD-LDS]: Active Directory Lightweight Directory Services Microsoft MSDN: Active Directory Schema Microsoft TechNet: Understanding Schema Microsoft TechNet Magazine: Extending the Active Directory Schema Microsoft MSDN: Active Directory Certificate Services Microsoft TechNet: Active Directory Certificate Services Directory services Microsoft server technology Windows components Windows 2000

2809

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

Arian (disambiguation)

Arianism is a nontrinitarian Christological doctrine. Arian may also refer to: Pertaining to Arius A follower of Arius, a Christian presbyter in the 3rd and 4th century Arian controversy, several controversies which divided the early Christian church Arian fragment, Arian palimpsest People Groups of people Arians or Areians, ancient people living in Ariana (origin of the modern name Iran) Aryan, a term associated with the Proto-Indo-Iranians Aryan race, the racial concept An inhabitant of Aria (today's Herat, Afghanistan), used by the ancient and medieval Greeks (as Ἄρ(ε)ιοι/Ar(e)ioi) and Romans (as Arii) Given name Arian Asllani (born 1983), American rapper known as Action Bronson Arian Bimo (born 1959), Albanian footballer Arian Çuliqi, Albanian television director and screenwriter Arian Foster (born 1986), American football player Arian Hametaj (born 1957), Albanian footballer Arián Iznaga, Cuban Paralympian sprinter Arian Kabashi (born 1996), Kosovan footballer Arian Kabashi (born 1997), Swedish footballer Arlan Lerio (born 1976), Filipino boxer Arian Leviste (born 1970), American electronic music artist, producer, and DJ Arian Moayed (born 1980), Iranian-born American actor and theater producer Arian Moreno (born 2003), Venezuelan footballer Surname Arman Arian (born 1981), Iranian author, novelist and researcher Asher Arian (1938–2010), American political scientist Laila Al-Arian (born 1980s), American broadcast journalist Sami Al-Arian (born 1958), Palestinian-American civil rights activist Praskovia Arian (1864–1949) Russian and Soviet writer and feminist Bruce Arians (born 1952), American football coach and former player Jake Arians (born 1978), American football player Other Arian (band), a pop band in Iran Arian (newspaper), an Iranian newspaper since 1914 Arian, an outsider's name for a member of the Polish Brethren Arian, a person born under the constellation Aries (astrology) See also Arian Kartli, ancient Georgian country Al-Arian, an Arab village in northern Israel Aaryan, a given name and surname Ariane (disambiguation), the French spelling of Ariadne, a character in Greek mythology Ariann Black, Canadian-American female magician Ariano (disambiguation) Arien (disambiguation) Arius (disambiguation) Ariyan A. Johnson Arrian, Greek historian Aryan (name) Ghamar Ariyan

2810

https://en.wikipedia.org/wiki/Aldona%20of%20Lithuania

Aldona of Lithuania

Aldona (baptized Ona or Anna; her pagan name, Aldona, is known only from the writings of Maciej Stryjkowski; – 26 May 1339) was Queen consort of Poland (1333–1339), and a princess of the Grand Duchy of Lithuania. She was the daughter of Gediminas, Grand Duke of Lithuania. Biography Aldona married Casimir III of Poland, when he was 15 or 16 years old. The bride was probably of about the same age. The marriage took place on 30 April or 16 October 1325 and was a purely political maneuver to strengthen the first Polish–Lithuanian coalition against the Teutonic Knights. Casimir was seeking allies in the dispute over Pomerania with the Order. Gediminas had just undertaken an unsuccessful attempt to Christianize Lithuania. This coalition was a prelude to the Union of Krewo in 1385, and the Union of Lublin in 1569, which resulted in the creation of a new state, the Polish–Lithuanian Commonwealth. The details of the agreement are not known; however, it is known that Gediminas released all Polish captives, some 25,000 people, who returned to Poland. The importance of the marriage was attested by the fact that Władysław abandoned his earlier plans to marry his son to Jutta of Bohemia. The alliance was put into effect when joint Polish–Lithuanian forces organized an attack against the Margraviate of Brandenburg in 1326. However, the coalition was not strong and collapsed c. 1330. Yet, there is no evidence of fighting between Poland and Lithuania while Aldona was alive. Aldona died suddenly at the end of May 1339, and was buried in Kraków. Aldona was remembered for her piety and devotion to music. She was accompanied by court musicians wherever she went. It was even suggested by Jan Długosz that the cymbals which were played in procession before her represented a pagan Lithuanian tradition. Her husband Casimir is known for his romantic affairs: after Aldona's death he married three more times. Aldona had two daughters: Cunigunde of Poland (died in 1357); married on 1 January 1345 Louis VI the Roman, the son of Louis IV, Holy Roman Emperor. Elisabeth (1326–1361); married Bogislaus V, Duke of Pomerania. Elisabeth's daughter, Elizabeth of Pomerania, was the fourth wife of Charles IV, Holy Roman Emperor. In popular culture Film Queen Aldona Anna is one of the main characters in the first season of Polish historical TV drama series "Korona Królów" ("The Crown of the Kings"). She is played by Marta Bryła. See also Family of Gediminas – family tree of Aldona Gediminids References 1309 births 1339 deaths 14th-century Polish nobility Polish queens consort Gediminids Piast dynasty 14th-century Lithuanian people 14th-century Lithuanian women 14th-century Polish women Year of birth uncertain Lithuanian princesses Casimir III the Great

2812

https://en.wikipedia.org/wiki/Aron%20Nimzowitsch

Aron Nimzowitsch

Aron Nimzowitsch (, , Aron Isayevich Nimtsovich; 7 November 1886 – 16 March 1935) was a Latvian-born Danish chess player and writer. In the late 1920s, Nimzowitsch was one of the best chess players in the world. He was the foremost figure amongst the hypermoderns and wrote a very influential book on chess theory: My System. Nimzowitsch’s seminal work Chess Praxis, originally published in German in 1929, was purchased by a pre-teen and future World Champion Tigran Petrosian and was to have a great influence on his development as a chess player. Life Born in Riga, then part of the Russian Empire, the Jewish Yiddish-speaking Nimzowitsch came from a wealthy family, where he learned chess from his father Shaya Abramovich Nimtsovich (1862, Pinsk – ?), who was a timber merchant. By 1897 the family lived in Dvinsk. In 1904, he travelled to Berlin to study philosophy, but set aside his studies soon and began a career as a professional chess player that same year. He won his first international tournament at Munich 1906. Then, he tied for first with Alexander Alekhine at Saint Petersburg 1913/14 (the eighth All-Russian Masters' Tournament). During the 1917 Russian Revolution, Nimzowitsch was in the Baltic war zone. He escaped being drafted into one of the armies by feigning madness, insisting that a fly was on his head. He then escaped to Berlin, and gave his first name as Arnold, possibly to avoid anti-Semitic persecution. Nimzowitsch eventually moved to Copenhagen in 1922, where he lived for the rest of his life in one small rented room. In Copenhagen, he won the Nordic Championship twice, in 1924 and in 1934. He obtained Danish citizenship and lived in Denmark until his death in 1935. Chess career The height of Nimzowitsch's career was the late 1920s and early 1930s. Chessmetrics places him as the third best player in the world from 1927 to 1931, behind Alexander Alekhine and José Capablanca. His most notable successes were first-place finishes at Copenhagen 1923, Marienbad 1925, Dresden 1926, Hanover 1926, the Carlsbad 1929 chess tournament, and second place behind Alekhine at the San Remo 1930 chess tournament. Nimzowitsch never developed a knack for match play, though; his best match success was a draw with Alekhine, but the match consisted of only two games and took place in 1914, thirteen years before Alekhine became world champion. Nimzowitsch never beat Capablanca (+0−5=6), but fared better against Alekhine (+3−9=9). He even beat Alekhine with the black pieces, in their short 1914 match at St. Petersburg. One of Nimzowitsch's most famous games is his celebrated immortal zugzwang game against Sämisch at Copenhagen 1923. Another game on this theme is his win over Paul Johner at Dresden 1926. When in form, Nimzowitsch was very dangerous with the black pieces, scoring many fine wins over top players. Legacy Nimzowitsch is considered one of the most important players and writers in chess history. His works influenced numerous other players, including Savielly Tartakower, Milan Vidmar, Richard Réti, Akiba Rubinstein, Mikhail Botvinnik, Bent Larsen, Viktor Korchnoi and Tigran Petrosian, and his influence is still felt today. He wrote three books on chess strategy: Mein System (My System), 1925; Die Praxis meines Systems (The Practice of My System), 1929, commonly known as Chess Praxis; and Die Blockade (The Blockade), 1925, although much in this book is generally held to be a rehash of material already presented in Mein System. Mein System is considered to be one of the most influential chess books of all time. It sets out Nimzowitsch's most important ideas, while his second most influential work, Chess Praxis, elaborates upon these ideas, adds a few new ones, and has immense value as a stimulating collection of Nimzowitsch's own games accompanied by his idiosyncratic, hyperbolic commentary which is often as entertaining as instructive. Nimzowitsch's chess theories, when first propounded, flew in the face of widely held orthodoxies enunciated by the dominant theorist of the era, Siegbert Tarrasch, and his disciples. Tarrasch's rigid generalizations drew on the earlier work of Wilhelm Steinitz, and were upheld by Tarrasch's sharp tongue when dismissing the opinions of doubters. While the greatest players of the time, among them Alekhine, Emanuel Lasker and Capablanca, clearly did not allow their play to be hobbled by blind adherence to general concepts that the center had to be controlled by pawns, that development had to happen in support of this control, that rooks always belong on open files, that wing openings were unsound—core ideas of Tarrasch's chess philosophy as popularly understood—beginners were taught to think of these generalizations as unalterable principles. Nimzowitsch supplemented many of the earlier simplistic assumptions about chess strategy by enunciating in his turn a further number of general concepts of defensive play aimed at achieving one's own goals by preventing realization of the opponent's plans. Notable in his "system" were concepts such as overprotection of pieces and pawns under attack, control of the center by pieces instead of pawns, blockading of opposing pieces (notably the passed pawns) and prophylaxis. His aforementioned game versus Paul Johner in 1926 (listed in the notable games below) is a great example of Nimzowitsch's concept of 'first restrain, then blockade and finally destroy'. He manoeuvres the black queen from its starting point to h7 to form a part of king-side blockade along with the knight on f6 and h-pawn to stop any attacking threats from White. He was also a leading exponent of the fianchetto development of bishops. Perhaps most importantly, he formulated the terminology still in use for various complex chess strategies. Others had used these ideas in practice, but he was the first to present them systematically as a lexicon of themes accompanied by extensive taxonomical observations. Raymond Keene writes that Nimzowitsch "was one of the world's leading grandmasters for a period extending over a quarter of a century, and for some of that time he was the obvious challenger for the world championship. ... [He was also] a great and profound chess thinker second only to Steinitz, and his works – Die Blockade, My System and Chess Praxis – established his reputation as one of the father figures of modern chess." GM Robert Byrne called him "perhaps the most brilliant theoretician and teacher in the history of the game." GM Jan Hein Donner called Nimzowitsch "a man who was too much of an artist to be able to prove he was right and who was regarded as something of a madman in his time. He would be understood only long after his death." Many chess openings and variations are named after Nimzowitsch, the most famous being the Nimzo-Indian Defence (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4) and the less often played Nimzowitsch Defence (1.e4 Nc6). Nimzowitsch biographer GM Raymond Keene and others have referred to 1.Nf3 followed by 2.b3 as the Nimzowitsch–Larsen Attack. Keene wrote a book about the opening with that title. These openings all exemplify Nimzowitsch's ideas about controlling the center with pieces instead of pawns. He was also vital in the development of two important systems in the French Defence, the Winawer Variation (in some places called the Nimzowitsch Variation; its moves are 1.e4 e6 2.d4 d5 3.Nc3 Bb4) and the Advance Variation (1.e4 e6 2.d4 d5 3.e5). He also pioneered two provocative variations of the Sicilian Defence: the Nimzowitsch Variation, 1.e4 c5 2.Nf3 Nf6, which invites 3.e5 Nd5 (similar to Alekhine's Defence) and 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5?! (the latter regarded as dubious today). International Master John L. Watson has dubbed the line 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 the "Nimzo-English", employing this designation in Chapter 11 of his book Mastering the Chess Openings, Volume 3. Personality There are many entertaining anecdotes regarding Nimzowitsch—some less savory than others. An article by Hans Kmoch and Fred Reinfeld entitled "Unconventional Surrender" on page 55 of the February 1950 Chess Review tells of the "... example of Nimzowitsch, who ... once missed first prize in a tournament in Berlin by losing to Sämisch, and when it became clear he was going to lose the game, Nimzowitsch stood up on the table and shouted, 'Gegen diesen Idioten muss ich verlieren!' ('That I should lose to this idiot!')". Nimzowitsch was annoyed by his opponents' smoking. A popular, but probably apocryphal, story is that once when an opponent laid an unlit cigar on the table, he complained to the tournament arbiters, "He is threatening to smoke, and as an old player you must know that the threat is stronger than the execution." Nimzowitsch had lengthy and somewhat bitter dogmatic conflicts with Tarrasch over whose ideas constituted 'proper' chess. Nimzowitsch's vanity and faith in his ideas of overprotection provoked Hans Kmoch to write a parody about him in February 1928 in the Wiener Schachzeitung. This consisted of a mock game against the fictional player "Systemsson", supposedly played and annotated by Nimzowitsch himself. The annotations gleefully exaggerate the idea of overprotection, as well as asserting the true genius of the wondrous idea. Kmoch was in fact a great admirer of Nimzowitsch, and Nimzowitsch was amused at the effort. Kmoch also wrote an article about his nine years with Nimzowitsch: Nimzovich suffered from the delusion that he was unappreciated and that the reason was malice. All it took to make him blossom, as I later learned, was a little praise. His paranoia was most evident when he dined in company. He always thought he was served much smaller portions than everyone else. He didn't care about the actual amount but only about the imagined affront. I once suggested that he and I order what the other actually wanted and, when the food was served, exchange plates. After we had done so, he shook his head in disbelief, still thinking that he had received the smaller portion. Nimzowitsch's colleague Tartakower observed of him, "He pretends to be crazy in order to drive us all crazy." Death Although he had long suffered from heart trouble, his early death was unexpected; taken ill suddenly at the end of 1934, he lay bedridden for three months before dying of pneumonia. He is buried in Bispebjerg Cemetery in Copenhagen. Notable games Friedrich Sämisch vs Aron Nimzowitsch, Copenhagen 1923, 0–1 The "Immortal Zugzwang Game" Paul Johner vs Aron Nimzowitsch, Dresden 1926, 0–1 This game was chosen by Bent Larsen as his favourite game in Learn from the Grandmasters. Richard Réti vs Aron Nimzowitsch, Berlin 1928, 0–1 Efim Bogoljubov vs Aron Nimzowitsch, San Remo 1930, 0–1 See also List of chess games List of Jewish chess players References Further reading External links A.N.'s Alternative Spellings of Names Nimzowitsch related articles 1886 births 1935 deaths Chess players of the Russian Empire Danish chess players Jewish chess players Sportspeople from Riga Latvian Jews Danish Ashkenazi Jews Danish people of Latvian-Jewish descent Chess theoreticians Chess writers Danish male writers Deaths from cancer in Denmark

2813

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

Aragonese language

Aragonese (; aragonés in Aragonese) is a Romance language spoken in several dialects by about 12,000 people as of 2011, in the Pyrenees valleys of Aragon, Spain, primarily in the comarcas of Somontano de Barbastro, Jacetania, Alto Gállego, Sobrarbe, and Ribagorza/Ribagorça. It is the only modern language which survived from medieval Navarro-Aragonese in a form distinctly different from Spanish. Historically, people referred to the language as fabla ("talk" or "speech"). Native Aragonese people usually refer to it by the names of its local dialects such as cheso (from Valle de Hecho) or patués (from the Benasque Valley). History Aragonese, which developed in portions of the Ebro basin, can be traced back to the High Middle Ages. It spread throughout the Pyrenees to areas where languages similar to modern Basque might have been previously spoken. The Kingdom of Aragon (formed by the counties of Aragon, Sobrarbe and Ribagorza) expanded southward from the mountains, pushing the Moors farther south in the Reconquista and spreading the Aragonese language. The union of the Catalan counties and the Kingdom of Aragon which formed the 12th-century Crown of Aragon did not merge the languages of the two territories; Catalan continued to be spoken in the east and Navarro-Aragonese in the west, with the boundaries blurred by dialectal continuity. The Aragonese Reconquista in the south ended with the cession of Murcia by James I of Aragon to the Kingdom of Castile as dowry for an Aragonese princess. The best-known proponent of the Aragonese language was Johan Ferrandez d'Heredia, the Grand Master of the Knights Hospitaller in Rhodes at the end of the 14th century. He wrote an extensive catalog of works in Aragonese and translated several works from Greek into Aragonese (the first in medieval Europe). The spread of Castilian (Spanish), the Castilian origin of the Trastámara dynasty, and the similarity between Castilian (Spanish) and Aragonese facilitated the recession of the latter. A turning point was the 15th-century coronation of the Castilian Ferdinand I of Aragon, also known as Ferdinand of Antequera. In the early 18th century, after the defeat of the allies of Aragon in the War of the Spanish Succession, Philip V ordered the prohibition of the Aragonese language in the schools and the establishment of Castilian (Spanish) as the only official language in Aragon. This was ordered in the Aragonese Nueva Planta decrees of 1707. In recent times, Aragonese was mostly regarded as a group of rural dialects of Spanish. Compulsory education undermined its already weak position; for example, pupils were punished for using it. However, the 1978 Spanish transition to democracy heralded literary works and studies of the language. Modern Aragonese Aragonese is the native language of the Aragonese mountain ranges of the Pyrenees, in the comarcas of Somontano, Jacetania, Sobrarbe, and Ribagorza. Cities and towns in which Aragonese is spoken are Huesca, Graus, Monzón, Barbastro, Bielsa, Chistén, Fonz, Echo, Estadilla, Benasque, Campo, Sabiñánigo, Jaca, Plan, Ansó, Ayerbe, Broto, and El Grado. It is spoken as a second language by inhabitants of Zaragoza, Huesca, Ejea de los Caballeros, or Teruel. According to recent polls, there are about 25,500 speakers (2011) including speakers living outside the native area. In 2017, the Dirección General de Política Lingüística de Aragón estimated there were 10,000 to 12,000 active speakers of Aragonese. In 2009, the Languages Act of Aragon (Law 10/2009) recognized the "native language, original and historic" of Aragon. The language received several linguistic rights, including its use in public administration. Some of the legislation was repealed by a new law in 2013 (Law 3/2013). [See Languages Acts of Aragon for more information on the subject] Dialects Western dialect: Ansó, Valle de Hecho, Chasa, Berdún, Chaca Central dialect: Panticosa, Biescas, Torla, Broto, Bielsa, Yebra de Basa, Aínsa-Sobrarbe Eastern dialect: Benás, Plan, Bisagorri, Campo, Perarrúa, Graus, Estadilla Southern dialect: Agüero, Ayerbe, Rasal, Bolea, Lierta, Uesca, Almudévar, Nozito, Labata, Alguezra, Angüés, Pertusa, Balbastro, Nabal Phonology Traits Aragonese has many historical traits in common with Catalan. Some are conservative features that are also shared with the Astur-Leonese languages and Galician-Portuguese, where Spanish innovated in ways that did not spread to nearby languages. Shared with Catalan Romance initial F- is preserved, e.g. FILIUM > ("son", Sp. , Cat. , Pt. ). Romance palatal approximant (GE-, GI-, I-) consistently became medieval , as in medieval Catalan and Portuguese. This becomes modern ch , as a result of the devoicing of sibilants (see below). In Spanish, the medieval result was either /, (modern ), , or nothing, depending on the context. E.g. IUVENEM > ("young man", Sp. , Cat. ), GELARE > ("to freeze", Sp. , Cat. ). Romance groups -LT-, -CT- result in , e.g. FACTUM > ("done", Sp. , Cat. , Gal./Port. ), MULTUM > ("many"/"much", Sp. , Cat. , Gal. , Port. ). Romance groups -X-, -PS-, SCj- result in voiceless palatal fricative ix , e.g. COXU > ("crippled", Sp. , Cat. ). Romance groups -Lj-, -C'L-, -T'L- result in palatal lateral ll , e.g. MULIERE > ("woman", Sp. , Cat. ), ACUC'LA > ("needle", Sp. , Cat. ). Shared with Catalan and Spanish Open O, E from Romance result systematically in diphthongs , , e.g. VET'LA > ("old woman", Sp. , Cat. , Pt. velha). This includes before a palatal approximant, e.g. > ("eight", Sp. , Cat. , Pt. oito). Spanish diphthongizes except before yod, whereas Catalan only diphthongizes before yod. Loss of final unstressed -E but not -O, e.g. GRANDE > ("big"), FACTUM > ("done"). Catalan loses both -E and -O (Cat. gran, fet); Spanish preserves -O and sometimes -E (Sp. hecho, gran ~ grande). Voiced stops may be lenited to approximants . Shared with Spanish Former voiced sibilants become voiceless (, ). The palatal is most often realized as a fricative . Shared with neither Latin -B- is maintained in past imperfect endings of verbs of the second and third conjugations: ("he had", Sp. , Cat. ), ("he was sleeping", Sp. , Cat. ). High Aragonese dialects (alto aragonés) and some dialects of Gascon have preserved the voicelessness of many intervocalic stop consonants, e.g. CLETAM > ("sheep hurdle", Cat. , Fr. ), CUCULLIATAM > ("crested lark", Sp. , Cat. ). Several Aragonese dialects maintain Latin as geminate . The mid vowels can be as open as , mainly in the Benasque dialect. Vowels Consonants Orthography In 2010, the Academia de l'Aragonés (founded in 2006) established an orthographic standard to modernize medieval orthography and to make it more etymological. The new orthography is used by the Aragonese Wikipedia. Aragonese had two orthographic standards: The grafía de Uesca, codified in 1987 by the Consello d'a Fabla Aragonesa (CFA) at a convention in Huesca, is used by most Aragonese writers. It has a more uniform system of assigning letters to phonemes, with less regard for etymology; words traditionally written with and are uniformly written with in the Uesca system. Similarly, , , and before and are all written . It uses letters associated with Spanish, such as . The grafia SLA, devised in 2004 by the Sociedat de Lingüistica Aragonesa (SLA), is used by some Aragonese writers. It uses etymological forms which are closer to Catalan, Occitan, and medieval Aragonese sources; trying to come closer to the original Aragonese and the other Occitano-Romance languages. In the SLA system , ,, , and before and are distinct, and the digraph replaces . During the 16th century, Aragonese Moriscos wrote aljamiado texts (Romance texts in Arabic writing), possibly because of their inability to write in Arabic. The language in these texts has a mixture of Aragonese and Castilian traits, and they are among the last known written examples of the Aragonese formerly spoken in central and southern Aragon. Grammar Aragonese grammar has a lot in common with Occitan and Catalan, but also Spanish. Articles The definite article in Aragonese has undergone dialect-related changes, with definite articles in Old Aragonese similar to their present Spanish equivalents. There are two main forms: These forms are used in the eastern and some central dialects. These forms are used in the western and some central dialects. Lexicology Neighboring Romance languages have influenced Aragonese. Catalan and Occitan influenced Aragonese for many years. Since the 15th century, Spanish has most influenced Aragonese; it was adopted throughout Aragon as the first language, limiting Aragonese to the northern region surrounding the Pyrenees. French has also influenced Aragonese; Italian loanwords have entered through other languages (such as Catalan), and Portuguese words have entered through Spanish. Germanic words came with the conquest of the region by Germanic peoples during the fifth century, and English has introduced a number of new words into the language. Gender Words that were part of the Latin second declension—as well as words that joined it later on—are usually masculine: FILIU(M) > fillo (son) SCIURU + OLU(M) > esquiruelo (squirrel) Words that were part of the Latin first declension are usually feminine: FILIA(M) > filla (daughter). Some Latin neuter plural nouns joined the first declension as singular feminine nouns: FOLIA > fuella (leaf). Words ending in -or are feminine: a honor, a calor, a color, and (in Medieval Aragonese) la amor The names of fruit trees usually end in -era (a suffix derived from Latin -ARIA) and are usually feminine: a perera, a manzanera, a nuquera, a castanyera, a tellera / o tilero, a olivera, a ciresera, l'almendrera The genders of river names vary: Many ending in -a are feminine: a Cinca/a Cinga, a Cinqueta, a Garona, L'Arba, a Noguera, a Isuela, La Uecha, La Uerva, etc. The last was known as río de la Uerba during the 16th century. Many from the second and the third declension are masculine: L'Ebro, O Galligo, O Flumen, L'Alcanadre. Pronouns Just like most other Occitano-Romance languages, Aragonese has partitive and locative clitic pronouns derived from the Latin inde and ibi: en/ne and bi/i/ie; unlike Ibero-Romance. Such pronouns are present in most major Romance languages (Catalan en and hi, Occitan ne and i, French en and y, and Italian ne and ci/vi). En/ne is used for: Partitive objects: No n'he visto como aquello ("I haven't seen anything like that", literally 'Not (of it) I have seen like that'). Partitive subjects: En fa tanto de mal ("It hurts so much", literally '(of it) it causes so much of pain') Ablatives, places from which movements originate: Se'n va ra memoria ("Memory goes away", literally '(away from [the mind]) memory goes') Bi/hi/ie is used for: Locatives, where something takes place: N'hi heba uno ("There was one of them"), literally '(Of them) there was one') Allatives, places that movements go towards or end: Vés-be ('Go there (imperative)') Literature Aragonese was not written until the 12th and 13th centuries; the history Liber Regum, Razón feita d'amor, Libre dels tres reys d'orient, and Vida de Santa María Egipcíaca date from this period, there is also an Aragonese version of the Chronicle of the Morea, differing also in its content and written in the late 14th century called Libro de los fechos et conquistas del principado de la Morea. Early modern period Since 1500, Spanish has been the cultural language of Aragon; many Aragonese wrote in Spanish, and during the 17th century the Argensola brothers went to Castile to teach Spanish. Aragonese became a popular village language. During the 17th century, popular literature in the language began to appear. In a 1650 Huesca literary contest, Aragonese poems were submitted by Matías Pradas, Isabel de Rodas and "Fileno, montañés". Contemporary literature The 19th and 20th centuries have seen a renaissance of Aragonese literature in several dialects. In 1844, Braulio Foz's novel Vida de Pedro Saputo was published in the Almudévar (southern) dialect. The 20th century featured Domingo Miral's costumbrist comedies and Veremundo Méndez Coarasa's poetry, both in Hecho (western) Aragonese; Cleto Torrodellas' poetry and Tonón de Baldomera's popular writings in the Graus (eastern) dialect and Arnal Cavero's costumbrist stories and Juana Coscujuela' novel A Lueca, historia d'una moceta d'o Semontano, also in the southern dialect. Aragonese in modern education The 1997 Aragonese law of languages stipulated that Aragonese (and Catalan) speakers had a right to the teaching of and in their own language. Following this, Aragonese lessons started in schools in the academic year 1997/98. It was originally taught as an extra-curricular, non-evaluable voluntary subject in four schools. However, whilst legally schools can choose to use Aragonese as the language of instruction, as of the academic year 2013/14, there are no recorded instances of this option being taken in primary or secondary education. In fact, the only current scenario in which Aragonese is used as the language of instruction is in the university course of Aragonese Philology, which is optional, taught over the summer and still only given in Aragonese in some of the lectures. Pre-school education In pre-school education, students whose parents wish them to be taught Aragonese receive between thirty minutes to one hour of Aragonese lessons a week. In the 2014/15 academic year there were 262 students recorded in pre-school Aragonese lessons. Primary school education The subject of Aragonese now has a fully developed curriculum in primary education in Aragon. Despite this, in academic year 2014/2015 there were only seven Aragonese teachers in the region across both pre-primary and primary education and none hold permanent positions, whilst the number of primary education students receiving Aragonese lessons was 320. As of 2017 there were 1068 reported Aragonese language students and 12 Aragonese language instructors in Aragon. Secondary school education There is no officially approved program or teaching materials for the Aragonese language at the secondary level, and though two non-official textbooks are available (Pos ixo... Materials ta aprender aragonés (Benítez, 2007) and Aragonés ta Secundaria (Campos, 2014)) many instructors create their own learning materials. Further, most schools with Aragonese programs that have the possibility of being offered as an examinative subject have elected not to do so. As of 2007 it is possible to use Aragonese as a language of instruction for multiple courses, however no program is yet to instruct any curricular or examinative courses in Aragonese. As of the 2014/2015 academic year there were 14 Aragonese language students at the secondary level. Higher Education Aragonese is not currently a possible field of study for a bachelor's or postgraduate degree in any official capacity, nor is Aragonese used as a medium of instruction. A bachelor's or master's degree may be obtained in Magisterio (teaching) At the University of Zaragoza, however no specialization in Aragonese language is currently available. As such those who wish to teach Aragonese at the pre-school, primary, or secondary level must already be competent in the language by being a native speaker or by other means. Further, prospective instructors must pass an ad hoc exam curated by the individual schools at which they wish to teach in order to prove their competence, as there are no recognized standard competency exams for the Aragonese language. Since the 1994/1995 academic year, Aragonese has been an elective subject within the bachelor's degree for primary school education at the University of Zaragoza's Huesca campus. Academia de l'Aragonés Arredol – Electronic Aragonese newspaper Rosario Ustáriz Borra References Further reading External links Catalogue of Aragonese publications Academia de l'Aragonés Consello d'a Fabla Aragonesa Ligallo de Fablans de l'Aragonés A.C. Nogará Sociedat de Lingüistica Aragonesa Aragonese language Aragonese culture Pyrenean-Mozarabic languages Subject–verb–object languages

2815

https://en.wikipedia.org/wiki/Advanced%20Mobile%20Phone%20System

Advanced Mobile Phone System

Advanced Mobile Phone System (AMPS) was an analog mobile phone system standard originally developed by Bell Labs and later modified in a cooperative effort between Bell Labs and Motorola. It was officially introduced in the Americas on October 13, 1983, Israel in 1986, Australia in 1987, Singapore in 1988, and Pakistan in 1990. It was the primary analog mobile phone system in North America (and other locales) through the 1980s and into the 2000s. As of February 18, 2008, carriers in the United States were no longer required to support AMPS and companies such as AT&T and Verizon Communications have discontinued this service permanently. AMPS was discontinued in Australia in September 2000, in Pakistan by October 2004, in Israel by January 2010, and Brazil by 2010. History The first cellular network efforts began at Bell Labs and with research conducted at Motorola. In 1960, John F. Mitchell became Motorola's chief engineer for its mobile-communication products, and oversaw the development and marketing of the first pager to use transistors. Motorola had long produced mobile telephones for automobiles, but these large and heavy models consumed too much power to allow their use without the automobile's engine running. Mitchell's team, which included the gifted Dr. Martin Cooper, developed portable cellular telephony. Cooper and Mitchell were among the Motorola employees granted a patent for this work in 1973. The first call on the prototype connected, reportedly, to a wrong number. While Motorola was developing a cellular phone, from 1968 to 1983 Bell Labs worked out a system called Advanced Mobile Phone System (AMPS), which became the first cellular network standard in the United States. The first system was successfully deployed in Chicago, Illinois, in 1979. Motorola and others designed and built the cellular phones for this and other cellular systems. Martin Cooper, a former general manager for the systems division at Motorola, led a team that produced the first cellular handset in 1973 and made the first phone call from it. In 1983 Motorola introduced the DynaTAC 8000x, the first commercially available cellular phone small enough to be easily carried. He later introduced the so-called Bag Phone. In 1992, the first smartphone, called IBM Simon, used AMPS. Frank Canova led its design at IBM and it was demonstrated that year at the COMDEX computer-industry trade-show. A refined version of the product was marketed to consumers in 1994 by BellSouth under the name Simon Personal Communicator. The Simon was the first device that can be properly referred to as a "smartphone", even though that term was not yet coined. Technology AMPS is a first-generation cellular technology that uses separate frequencies, or "channels", for each conversation. It therefore required considerable bandwidth for a large number of users. In general terms, AMPS was very similar to the older "0G" Improved Mobile Telephone Service it replaced, but used considerably more computing power to select frequencies, hand off conversations to land lines, and handle billing and call setup. What really separated AMPS from older systems is the "back end" call setup functionality. In AMPS, the cell centers could flexibly assign channels to handsets based on signal strength, allowing the same frequency to be re-used, without interference, if locations were separated enough. The channels were grouped so a specific set was different of the one used on the cell nearby. This allowed a larger number of phones to be supported over a geographical area. AMPS pioneers coined the term "cellular" because of its use of small hexagonal "cells" within a system. AMPS suffered from many weaknesses compared to today's digital technologies. As an analog standard, it was susceptible to static and noise, and there was no protection from 'eavesdropping' using a scanner or an older TV set that could tune into channels 70-83. Cloning In the 1990s, an epidemic of "cloning" cost the cellular carriers millions of dollars. An eavesdropper with specialized equipment could intercept a handset's ESN (Electronic Serial Number) and MDN or CTN (Mobile Directory Number or Cellular Telephone Number). The Electronic Serial Number, a 12-digit number sent by the handset to the cellular system for billing purposes, uniquely identified that phone on the network. The system then allowed or disallowed calls and/or features based on its customer file. A person intercepting an ESN/MDN pair could clone the combination onto a different phone and use it in other areas for making calls without paying. Cellular phone cloning became possible with off-the-shelf technology in the 1990s. Would-be cloners required three key items : A radio receiver, such as the Icom PCR-1000, that could tune into the Reverse Channel (the frequency on which AMPS phones transmit data to the tower) A PC with a sound card and a software program called Banpaia A phone that could easily be used for cloning, such as the Oki 900 The radio, when tuned to the proper frequency, would receive the signal transmitted by the cell phone to be cloned, containing the phone's ESN/MDN pair. This signal would feed into the sound-card audio-input of the PC, and Banpaia would decode the ESN/MDN pair from this signal and display it on the screen. The hacker could then copy that data into the Oki 900 phone and reboot it, after which the phone network could not distinguish the Oki from the original phone whose signal had been received. This gave the cloner, through the Oki phone, the ability to use the mobile-phone service of the legitimate subscriber whose phone was cloned – just as if that phone had been physically stolen, except that the subscriber retained his or her phone, unaware that the phone had been cloned—at least until that subscriber received his or her next bill. The problem became so large that some carriers required the use of a PIN before making calls. Eventually, the cellular companies initiated a system called RF Fingerprinting, whereby it could determine subtle differences in the signal of one phone from another and shut down some cloned phones. Some legitimate customers had problems with this though if they made certain changes to their own phone, such as replacing the battery and/or antenna. The Oki 900 could listen in to AMPS phone-calls right out-of-the-box with no hardware modifications. Standards AMPS was originally standardized by American National Standards Institute (ANSI) as EIA/TIA/IS-3. EIA/TIA/IS-3 was superseded by EIA/TIA-553 and TIA interim standard with digital technologies, the cost of wireless service is so low that the problem of cloning has virtually disappeared. Frequency bands AMPS cellular service operated in the 850 MHz Cellular band. For each market area, the United States Federal Communications Commission (FCC) allowed two licensees (networks) known as "A" and "B" carriers. Each carrier within a market used a specified "block" of frequencies consisting of 21 control channels and 395 voice channels. Originally, the B (wireline) side license was usually owned by the local phone company, and the A (non-wireline) license was given to wireless telephone providers. At the inception of cellular in 1983, the FCC had granted each carrier within a market 333 channel pairs (666 channels total). By the late 1980s, the cellular industry's subscriber base had grown into the millions across America and it became necessary to add channels for additional capacity. In 1989, the FCC granted carriers an expansion from the previous 666 channels to the final 832 (416 pairs per carrier). The additional frequencies were from the band held in reserve for future (inevitable) expansion. These frequencies were immediately adjacent to the existing cellular band. These bands had previously been allocated to UHF TV channels 70–83. Each duplex channel was composed of 2 frequencies. 416 of these were in the 824–849 MHz range for transmissions from mobile stations to the base stations, paired with 416 frequencies in the 869–894 MHz range for transmissions from base stations to the mobile stations. Each cell site used a different subset of these channels than its neighbors to avoid interference. This significantly reduced the number of channels available at each site in real-world systems. Each AMPS channel had a one way bandwidth of 30 kHz, for a total of 60 kHz for each duplex channel. Laws were passed in the US which prohibited the FCC type acceptance and sale of any receiver which could tune the frequency ranges occupied by analog AMPS cellular services. Though the service is no longer offered, these laws remain in force (although they may no longer be enforced). Narrowband AMPS In 1991, Motorola proposed an AMPS enhancement known as narrowband AMPS (NAMPS or N-AMPS). Digital AMPS Later, many AMPS networks were partially converted to D-AMPS, often referred to as TDMA (though TDMA is a generic term that applies to many 2G cellular systems). D-AMPS, commercially deployed since 1993, was a digital, 2G standard used mainly by AT&T Mobility and U.S. Cellular in the United States, Rogers Wireless in Canada, Telcel in Mexico, Telecom Italia Mobile (TIM) in Brazil, VimpelCom in Russia, Movilnet in Venezuela, and Cellcom in Israel. In most areas, D-AMPS is no longer offered and has been replaced by more advanced digital wireless networks. Successor technologies AMPS and D-AMPS have now been phased out in favor of either CDMA2000 or GSM, which allow for higher capacity data transfers for services such as WAP, Multimedia Messaging System (MMS), and wireless Internet access. There are some phones capable of supporting AMPS, D-AMPS and GSM all in one phone (using the GAIT standard). Analog AMPS being replaced by digital In 2002, the FCC decided to no longer require A and B carriers to support AMPS service as of February 18, 2008. All AMPS carriers have converted to a digital standard such as CDMA2000 or GSM. Digital technologies such as GSM and CDMA2000 support multiple voice calls on the same channel and offer enhanced features such as two-way text messaging and data services. Unlike in the United States, the Canadian Radio-television and Telecommunications Commission (CRTC) and Industry Canada have not set any requirement for maintaining AMPS service in Canada. Rogers Wireless has dismantled their AMPS (along with IS-136) network; the networks were shut down May 31, 2007. Bell Mobility and Telus Mobility, who operated AMPS networks in Canada, announced that they would observe the same timetable as outlined by the FCC in the United States, and as a result would not begin to dismantle their AMPS networks until after February 2008. OnStar relied heavily on North American AMPS service for its subscribers because, when the system was developed, AMPS offered the most comprehensive wireless coverage in the US. In 2006, ADT asked the FCC to extend the AMPS deadline due to many of their alarm systems still using analog technology to communicate with the control centers. Cellular companies who own an A or B license (such as Verizon and Alltel) were required to provide analog service until February 18, 2008. After that point, however, most cellular companies were eager to shut down AMPS and use the remaining channels for digital services. OnStar transitioned to digital service with the help of data transport technology developed by Airbiquity, but warned customers who could not be upgraded to digital service that their service would permanently expire on January 1, 2008. Companies that used analog AMPS Verizon Wireless—Formerly operating an AMPS network, on February 18, 2008, Verizon has discontinued all AMPS service. Now primarily operates on CDMA2000 technology. Bell Mobility and Telus Mobility operated AMPS networks in Canada, though they have since been overlaid with digital services. Both Bell Mobility and Telus Mobility had announced that they would observe the same shutdown guidelines as in the United States, and decommissioned their AMPS networks in 2008. Alltel—In 2005 disclosed that only 15% of their total customer base are still using the existing analog network. The company has posted a three phase turn down schedule, which was completed in September 2008. With the acquisition of Western Wireless, Alltel now took the claim of the "largest network in America." The claim was true, oddly enough because of wide analog coverage in rural areas. All Alltel AMPS and D-AMPS service was discontinued in September 2008 Coastel Offshore Cellular—Operated an AMPS network in the Gulf of Mexico that stretched from south of Corpus Christi, TX to south of Gulf Shores, AL. In 2006 Coastel was the only carrier in the US whose entire customer base was still 100% analog based. In 2007 Coastel was merged with Petrocom and SOLA Communications to form Broadpoint Inc. and the network was converted to GSM. Moviline (Telefónica Servicios Uno since 1971, Moviline since 1994) was the analogue service provider for the Spanish operator. Moviline has operated an ETACS 900 (MHz) network in Spain. Since December 31, 2003, the system has been closed to new users, at that time, it covered 100% of the Spanish population, but now some antennas have been given to GSM operators. The Moviline brand has been completely replaced by Movistar, the digital brand of Telefónica, since 1992. The network was completely converted to GSM and it is in all Spanish territory. Movistar have a 3G network with Universal Mobile Telecommunications System (UMTS) technology, and offer services over GSM in places without 3G coverage. AT&T Mobility – In areas where AT&T Mobility previously had D-AMPS operating on 1900 MHz frequencies, no analog AMPS network existed, and the D-AMPS network on the 1900 MHz frequency was shut down in mid-2007. Service on the remaining 850 MHz AMPS markets was discontinued along with 850 MHz D-AMPS service on February 18, 2008, except in areas where service was provided by Dobson Communications. The Dobson AMPS and TDMA networks were shut down on March 1, 2008. Telecom New Zealand (now Spark New Zealand) – operated an AMPS/TDMA network in New Zealand from 1987 until 2007 throughout the whole country and the network was renowned for its superb coverage, In 2000 Telecom announced that they would discontinue the AMPS network within 5 years (2005) to give customers an opportunity to transition to the CDMA2000 and later 1XRTT technologies that replaced it. They later extended that deadline until 6 pm March 31, 2007. At approximately 7:15 on March 31, 2007 the AMPS/TDMA network ceased to function. Telstra (formerly Telecom Australia) – operated an AMPS network in Australia from February 1987 until the end of 2000. As part of the introduction of mobile phone competition in Australia, the Australian government mandated GSM as the new standard for mobile networks, and required that Telstra close the AMPS network by 2000. However, GSM base stations could only serve a limited area. While this was OK for Europe, it meant that GSM could not cover large, sparsely populated rural areas of Australia cost effectively. Telstra deployed a CDMA network, which did not suffer this limitation, and while the AMPS network was closed down at the end of 1999 in the major cities, the closure deadline was extended until the end of 2000 in rural areas to ease the transition to CDMA. The CDMA network has since been replaced by an 850 MHz UMTS network, Next G. SaskTel – operated an AMPS network in Saskatchewan, Canada. It was the third-largest AMPS network, by subscribers, in the world at the time of its turndown. It was officially shutdown site by site starting at 00:00 on January 2, 2010 after twenty-one years of service. SaskTel continues to run UMTS networks. Etisalat (previously known as Celltel / TIGO) – operated a Motorola TAC network in Sri Lanka. It was the largest analog network in Sri Lanka. The site was officially shutdown on October 31, 2006 after 17 years of service. Etisalat – Sri Lanka continues to run GSM and HSPA+(Evolved High-Speed Packet Access) networks. Pelephone – began offering nationwide AMPS service in Israel in 1986. In the mid-1990s it converted to CDMA (IS-95 and later EV-DO) and in the mid-2000s converted to UMTS. Singtel (previously known as Telecommunications Equipment) – operated an AMPS network, marketed as a Cellular Mobile Radio System (CMRS), in Singapore from 1988 until 1994. In 1989, Singapore's Mass Rapid Transit (MRT) became the first rapid transit system in the world to have full mobile phone coverage inside underground stations and tunnels using AMPS technology. Singtel decommissioned its AMPS network in 1994 after GSM was implemented. Paktel was granted an AMPS licence in early 1990 to operate a cellular telephone network throughout Pakistan. It was the first company granted a free license to carry out cellular phone services in Pakistan. It carried out AMPS services until 2004, after which it switched to GSM. See also History of mobile phones Citations References Interview of Joel Engel History of mobile phones Mobile radio telephone systems Telecommunications-related introductions in 1983

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

Aerodynamics

Aerodynamics, from Greek ἀήρ aero (air) + δυναμική (dynamics), is the study of the motion of air, particularly when affected by a solid object, such as an airplane wing. It involves topics covered in the field of fluid dynamics and its subfield of gas dynamics.The term aerodynamics is often used synonymously with gas dynamics, the difference being that "gas dynamics" applies to the study of the motion of all gases, and is not limited to air. The formal study of aerodynamics began in the modern sense in the eighteenth century, although observations of fundamental concepts such as aerodynamic drag were recorded much earlier. Most of the early efforts in aerodynamics were directed toward achieving heavier-than-air flight, which was first demonstrated by Otto Lilienthal in 1891. Since then, the use of aerodynamics through mathematical analysis, empirical approximations, wind tunnel experimentation, and computer simulations has formed a rational basis for the development of heavier-than-air flight and a number of other technologies. Recent work in aerodynamics has focused on issues related to compressible flow, turbulence, and boundary layers and has become increasingly computational in nature. History Modern aerodynamics only dates back to the seventeenth century, but aerodynamic forces have been harnessed by humans for thousands of years in sailboats and windmills, and images and stories of flight appear throughout recorded history, such as the Ancient Greek legend of Icarus and Daedalus. Fundamental concepts of continuum, drag, and pressure gradients appear in the work of Aristotle and Archimedes. In 1726, Sir Isaac Newton became the first person to develop a theory of air resistance, making him one of the first aerodynamicists. Dutch-Swiss mathematician Daniel Bernoulli followed in 1738 with Hydrodynamica in which he described a fundamental relationship between pressure, density, and flow velocity for incompressible flow known today as Bernoulli's principle, which provides one method for calculating aerodynamic lift. In 1757, Leonhard Euler published the more general Euler equations which could be applied to both compressible and incompressible flows. The Euler equations were extended to incorporate the effects of viscosity in the first half of the 1800s, resulting in the Navier–Stokes equations. The Navier-Stokes equations are the most general governing equations of fluid flow but are difficult to solve for the flow around all but the simplest of shapes. In 1799, Sir George Cayley became the first person to identify the four aerodynamic forces of flight (weight, lift, drag, and thrust), as well as the relationships between them, and in doing so outlined the path toward achieving heavier-than-air flight for the next century. In 1871, Francis Herbert Wenham constructed the first wind tunnel, allowing precise measurements of aerodynamic forces. Drag theories were developed by Jean le Rond d'Alembert, Gustav Kirchhoff, and Lord Rayleigh. In 1889, Charles Renard, a French aeronautical engineer, became the first person to reasonably predict the power needed for sustained flight. Otto Lilienthal, the first person to become highly successful with glider flights, was also the first to propose thin, curved airfoils that would produce high lift and low drag. Building on these developments as well as research carried out in their own wind tunnel, the Wright brothers flew the first powered airplane on December 17, 1903. During the time of the first flights, Frederick W. Lanchester, Martin Kutta, and Nikolai Zhukovsky independently created theories that connected circulation of a fluid flow to lift. Kutta and Zhukovsky went on to develop a two-dimensional wing theory. Expanding upon the work of Lanchester, Ludwig Prandtl is credited with developing the mathematics behind thin-airfoil and lifting-line theories as well as work with boundary layers. As aircraft speed increased designers began to encounter challenges associated with air compressibility at speeds near the speed of sound. The differences in airflow under such conditions lead to problems in aircraft control, increased drag due to shock waves, and the threat of structural failure due to aeroelastic flutter. The ratio of the flow speed to the speed of sound was named the Mach number after Ernst Mach who was one of the first to investigate the properties of the supersonic flow. Macquorn Rankine and Pierre Henri Hugoniot independently developed the theory for flow properties before and after a shock wave, while Jakob Ackeret led the initial work of calculating the lift and drag of supersonic airfoils. Theodore von Kármán and Hugh Latimer Dryden introduced the term transonic to describe flow speeds between the critical Mach number and Mach 1 where drag increases rapidly. This rapid increase in drag led aerodynamicists and aviators to disagree on whether supersonic flight was achievable until the sound barrier was broken in 1947 using the Bell X-1 aircraft. By the time the sound barrier was broken, aerodynamicists' understanding of the subsonic and low supersonic flow had matured. The Cold War prompted the design of an ever-evolving line of high-performance aircraft. Computational fluid dynamics began as an effort to solve for flow properties around complex objects and has rapidly grown to the point where entire aircraft can be designed using computer software, with wind-tunnel tests followed by flight tests to confirm the computer predictions. Understanding of supersonic and hypersonic aerodynamics has matured since the 1960s, and the goals of aerodynamicists have shifted from the behaviour of fluid flow to the engineering of a vehicle such that it interacts predictably with the fluid flow. Designing aircraft for supersonic and hypersonic conditions, as well as the desire to improve the aerodynamic efficiency of current aircraft and propulsion systems, continues to motivate new research in aerodynamics, while work continues to be done on important problems in basic aerodynamic theory related to flow turbulence and the existence and uniqueness of analytical solutions to the Navier-Stokes equations. Fundamental concepts Understanding the motion of air around an object (often called a flow field) enables the calculation of forces and moments acting on the object. In many aerodynamics problems, the forces of interest are the fundamental forces of flight: lift, drag, thrust, and weight. Of these, lift and drag are aerodynamic forces, i.e. forces due to air flow over a solid body. Calculation of these quantities is often founded upon the assumption that the flow field behaves as a continuum. Continuum flow fields are characterized by properties such as flow velocity, pressure, density, and temperature, which may be functions of position and time. These properties may be directly or indirectly measured in aerodynamics experiments or calculated starting with the equations for conservation of mass, momentum, and energy in air flows. Density, flow velocity, and an additional property, viscosity, are used to classify flow fields. Flow classification Flow velocity is used to classify flows according to speed regime. Subsonic flows are flow fields in which the air speed field is always below the local speed of sound. Transonic flows include both regions of subsonic flow and regions in which the local flow speed is greater than the local speed of sound. Supersonic flows are defined to be flows in which the flow speed is greater than the speed of sound everywhere. A fourth classification, hypersonic flow, refers to flows where the flow speed is much greater than the speed of sound. Aerodynamicists disagree on the precise definition of hypersonic flow. Compressible flow accounts for varying density within the flow. Subsonic flows are often idealized as incompressible, i.e. the density is assumed to be constant. Transonic and supersonic flows are compressible, and calculations that neglect the changes of density in these flow fields will yield inaccurate results. Viscosity is associated with the frictional forces in a flow. In some flow fields, viscous effects are very small, and approximate solutions may safely neglect viscous effects. These approximations are called inviscid flows. Flows for which viscosity is not neglected are called viscous flows. Finally, aerodynamic problems may also be classified by the flow environment. External aerodynamics is the study of flow around solid objects of various shapes (e.g. around an airplane wing), while internal aerodynamics is the study of flow through passages inside solid objects (e.g. through a jet engine). Continuum assumption Unlike liquids and solids, gases are composed of discrete molecules which occupy only a small fraction of the volume filled by the gas. On a molecular level, flow fields are made up of the collisions of many individual of gas molecules between themselves and with solid surfaces. However, in most aerodynamics applications, the discrete molecular nature of gases is ignored, and the flow field is assumed to behave as a continuum. This assumption allows fluid properties such as density and flow velocity to be defined everywhere within the flow. The validity of the continuum assumption is dependent on the density of the gas and the application in question. For the continuum assumption to be valid, the mean free path length must be much smaller than the length scale of the application in question. For example, many aerodynamics applications deal with aircraft flying in atmospheric conditions, where the mean free path length is on the order of micrometers and where the body is orders of magnitude larger. In these cases, the length scale of the aircraft ranges from a few meters to a few tens of meters, which is much larger than the mean free path length. For such applications, the continuum assumption is reasonable. The continuum assumption is less valid for extremely low-density flows, such as those encountered by vehicles at very high altitudes (e.g. 300,000 ft/90 km) or satellites in Low Earth orbit. In those cases, statistical mechanics is a more accurate method of solving the problem than is continuum aerodynamics. The Knudsen number can be used to guide the choice between statistical mechanics and the continuous formulation of aerodynamics. Conservation laws The assumption of a fluid continuum allows problems in aerodynamics to be solved using fluid dynamics conservation laws. Three conservation principles are used: Conservation of mass Conservation of mass requires that mass is neither created nor destroyed within a flow; the mathematical formulation of this principle is known as the mass continuity equation. Conservation of momentum The mathematical formulation of this principle can be considered an application of Newton's Second Law. Momentum within a flow is only changed by external forces, which may include both surface forces, such as viscous (frictional) forces, and body forces, such as weight. The momentum conservation principle may be expressed as either a vector equation or separated into a set of three scalar equations (x,y,z components). Conservation of energy The energy conservation equation states that energy is neither created nor destroyed within a flow, and that any addition or subtraction of energy to a volume in the flow is caused by heat transfer, or by work into and out of the region of interest. Together, these equations are known as the Navier-Stokes equations, although some authors define the term to only include the momentum equation(s). The Navier-Stokes equations have no known analytical solution and are solved in modern aerodynamics using computational techniques. Because computational methods using high speed computers were not historically available and the high computational cost of solving these complex equations now that they are available, simplifications of the Navier-Stokes equations have been and continue to be employed. The Euler equations are a set of similar conservation equations which neglect viscosity and may be used in cases where the effect of viscosity is expected to be small. Further simplifications lead to Laplace's equation and potential flow theory. Additionally, Bernoulli's equation is a solution in one dimension to both the momentum and energy conservation equations. The ideal gas law or another such equation of state is often used in conjunction with these equations to form a determined system that allows the solution for the unknown variables. Branches of aerodynamics Aerodynamic problems are classified by the flow environment or properties of the flow, including flow speed, compressibility, and viscosity. External aerodynamics is the study of flow around solid objects of various shapes. Evaluating the lift and drag on an airplane or the shock waves that form in front of the nose of a rocket are examples of external aerodynamics. Internal aerodynamics is the study of flow through passages in solid objects. For instance, internal aerodynamics encompasses the study of the airflow through a jet engine or through an air conditioning pipe. Aerodynamic problems can also be classified according to whether the flow speed is below, near or above the speed of sound. A problem is called subsonic if all the speeds in the problem are less than the speed of sound, transonic if speeds both below and above the speed of sound are present (normally when the characteristic speed is approximately the speed of sound), supersonic when the characteristic flow speed is greater than the speed of sound, and hypersonic when the flow speed is much greater than the speed of sound. Aerodynamicists disagree over the precise definition of hypersonic flow; a rough definition considers flows with Mach numbers above 5 to be hypersonic. The influence of viscosity on the flow dictates a third classification. Some problems may encounter only very small viscous effects, in which case viscosity can be considered to be negligible. The approximations to these problems are called inviscid flows. Flows for which viscosity cannot be neglected are called viscous flows. Incompressible aerodynamics An incompressible flow is a flow in which density is constant in both time and space. Although all real fluids are compressible, a flow is often approximated as incompressible if the effect of the density changes cause only small changes to the calculated results. This is more likely to be true when the flow speeds are significantly lower than the speed of sound. Effects of compressibility are more significant at speeds close to or above the speed of sound. The Mach number is used to evaluate whether the incompressibility can be assumed, otherwise the effects of compressibility must be included. Subsonic flow Subsonic (or low-speed) aerodynamics describes fluid motion in flows which are much lower than the speed of sound everywhere in the flow. There are several branches of subsonic flow but one special case arises when the flow is inviscid, incompressible and irrotational. This case is called potential flow and allows the differential equations that describe the flow to be a simplified version of the equations of fluid dynamics, thus making available to the aerodynamicist a range of quick and easy solutions. In solving a subsonic problem, one decision to be made by the aerodynamicist is whether to incorporate the effects of compressibility. Compressibility is a description of the amount of change of density in the flow. When the effects of compressibility on the solution are small, the assumption that density is constant may be made. The problem is then an incompressible low-speed aerodynamics problem. When the density is allowed to vary, the flow is called compressible. In air, compressibility effects are usually ignored when the Mach number in the flow does not exceed 0.3 (about 335 feet (102 m) per second or 228 miles (366 km) per hour at 60 °F (16 °C)). Above Mach 0.3, the problem flow should be described using compressible aerodynamics. Compressible aerodynamics According to the theory of aerodynamics, a flow is considered to be compressible if the density changes along a streamline. This means that – unlike incompressible flow – changes in density are considered. In general, this is the case where the Mach number in part or all of the flow exceeds 0.3. The Mach 0.3 value is rather arbitrary, but it is used because gas flows with a Mach number below that value demonstrate changes in density of less than 5%. Furthermore, that maximum 5% density change occurs at the stagnation point (the point on the object where flow speed is zero), while the density changes around the rest of the object will be significantly lower. Transonic, supersonic, and hypersonic flows are all compressible flows. Transonic flow The term Transonic refers to a range of flow velocities just below and above the local speed of sound (generally taken as Mach 0.8–1.2). It is defined as the range of speeds between the critical Mach number, when some parts of the airflow over an aircraft become supersonic, and a higher speed, typically near Mach 1.2, when all of the airflow is supersonic. Between these speeds, some of the airflow is supersonic, while some of the airflow is not supersonic. Supersonic flow Supersonic aerodynamic problems are those involving flow speeds greater than the speed of sound. Calculating the lift on the Concorde during cruise can be an example of a supersonic aerodynamic problem. Supersonic flow behaves very differently from subsonic flow. Fluids react to differences in pressure; pressure changes are how a fluid is "told" to respond to its environment. Therefore, since sound is, in fact, an infinitesimal pressure difference propagating through a fluid, the speed of sound in that fluid can be considered the fastest speed that "information" can travel in the flow. This difference most obviously manifests itself in the case of a fluid striking an object. In front of that object, the fluid builds up a stagnation pressure as impact with the object brings the moving fluid to rest. In fluid traveling at subsonic speed, this pressure disturbance can propagate upstream, changing the flow pattern ahead of the object and giving the impression that the fluid "knows" the object is there by seemingly adjusting its movement and is flowing around it. In a supersonic flow, however, the pressure disturbance cannot propagate upstream. Thus, when the fluid finally reaches the object it strikes it and the fluid is forced to change its properties – temperature, density, pressure, and Mach number—in an extremely violent and irreversible fashion called a shock wave. The presence of shock waves, along with the compressibility effects of high-flow velocity (see Reynolds number) fluids, is the central difference between the supersonic and subsonic aerodynamics regimes. Hypersonic flow In aerodynamics, hypersonic speeds are speeds that are highly supersonic. In the 1970s, the term generally came to refer to speeds of Mach 5 (5 times the speed of sound) and above. The hypersonic regime is a subset of the supersonic regime. Hypersonic flow is characterized by high temperature flow behind a shock wave, viscous interaction, and chemical dissociation of gas. Associated terminology The incompressible and compressible flow regimes produce many associated phenomena, such as boundary layers and turbulence. Boundary layers The concept of a boundary layer is important in many problems in aerodynamics. The viscosity and fluid friction in the air is approximated as being significant only in this thin layer. This assumption makes the description of such aerodynamics much more tractable mathematically. Turbulence In aerodynamics, turbulence is characterized by chaotic property changes in the flow. These include low momentum diffusion, high momentum convection, and rapid variation of pressure and flow velocity in space and time. Flow that is not turbulent is called laminar flow. Aerodynamics in other fields Engineering design Aerodynamics is a significant element of vehicle design, including road cars and trucks where the main goal is to reduce the vehicle drag coefficient, and racing cars, where in addition to reducing drag the goal is also to increase the overall level of downforce. Aerodynamics is also important in the prediction of forces and moments acting on sailing vessels. It is used in the design of mechanical components such as hard drive heads. Structural engineers resort to aerodynamics, and particularly aeroelasticity, when calculating wind loads in the design of large buildings, bridges, and wind turbines The aerodynamics of internal passages is important in heating/ventilation, gas piping, and in automotive engines where detailed flow patterns strongly affect the performance of the engine. Environmental design Urban aerodynamics are studied by town planners and designers seeking to improve amenity in outdoor spaces, or in creating urban microclimates to reduce the effects of urban pollution. The field of environmental aerodynamics describes ways in which atmospheric circulation and flight mechanics affect ecosystems. Aerodynamic equations are used in numerical weather prediction. Ball-control in sports Sports in which aerodynamics are of crucial importance include soccer, table tennis, cricket, baseball, and golf, in which most players can control the trajectory of the ball using the "Magnus effect". See also Aeronautics Aerostatics Aviation Insect flight – how bugs fly List of aerospace engineering topics List of engineering topics Nose cone design Fluid dynamics Computational fluid dynamics References Further reading General aerodynamics Subsonic aerodynamics Obert, Ed (2009). . Delft; About practical aerodynamics in industry and the effects on design of aircraft. . Transonic aerodynamics Supersonic aerodynamics Hypersonic aerodynamics History of aerodynamics Aerodynamics related to engineering Ground vehicles Fixed-wing aircraft Helicopters Missiles Model aircraft Related branches of aerodynamics Aerothermodynamics Aeroelasticity Boundary layers Turbulence External links NASA Beginner's Guide to Aerodynamics Aerodynamics for Students Aerodynamics for Pilots Aerodynamics and Race Car Tuning Aerodynamic Related Projects eFluids Bicycle Aerodynamics Application of Aerodynamics in Formula One (F1) Aerodynamics in Car Racing Aerodynamics of Birds NASA Aerodynamics Index Dynamics Energy in transport

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https://en.wikipedia.org/wiki/Andreas%20Schl%C3%BCter

Andreas Schlüter

Andreas Schlüter (1659 – c. June 1714) was a German baroque sculptor and architect, active in the Holy Roman Empire of the German Nation, the Polish–Lithuanian Commonwealth, and the Russian Tsardom. Biography Andreas Schlüter was born probably in Hamburg. His early life is obscure as at least three different persons of that name are documented. The records of St. Michaelis Church, Hamburg show that an Andreas Schlüter, son of sculptor Gerhart Schlüter, had been baptized there on 22 May 1664. Documents from Danzig/Gdańsk (Royal Prussia) reported that an Andreas Schlüter (senior) had worked 1640–1652 in Danzig's Jopengasse lane (today's ulica Piwna). Possibly born in 1640, an Andres Schliter is recorded as apprentice on 9 May 1656 by the mason's guild. Other sources state 1659 as year of birth. He probably did spend several years abroad as Journeyman. His first work, in 1675, may have been epitaphs of the Dukes Sambor and Mestwin in the dome of Pelplin monastery. Schlüter's first known work was the decoration of the facade of the Danzig Royal Chapel, in 1681. He later created statues for King John III Sobieski's Wilanów Palace in Warsaw and sepulchral sculptures in Żółkiew (Zhovkva). In 1689, he moved to Warsaw and made the pediment reliefs and sculptural work of Krasiński Palace. Schlüter was invited to Berlin in 1694 by Eberhard von Danckelmann to work as court sculptor at the armory (Zeughaus) for Elector Frederick III. His sculpted decorations are a masterpiece of baroque expression and pathos. While the more visible reliefs on the outside had to praise fighting, the statues of dying warriors in the interior denounced war and gave an indication of his pacifist religious beliefs (he is said to have been a Mennonite). Travelling through Italy in 1696, he studied the work of masters like Michelangelo Buonarroti and Gian Lorenzo Bernini. Schlüter also worked as an architect and built many state buildings in Berlin in his role as "Hofbaumeister" (Court Architect), which he lost when one tower showed signs of a weak fundament. He also served as director of the Prussian Academy of Arts from 1702 to 1704, after which he began concentrating on sculpting again, as "Hofbildhauer" (Court Sculptor). His most important equestrian sculpture is that of the "Great Elector", Frederick William of Brandenburg, cast in 1708 and placed at "Lange Brücke" near the Berlin City Palace, now situated in the honor court before Charlottenburg Palace. The Berlin City Palace, and many of his works, were partially destroyed by bombing in World War II and by the subsequent Communist regime. A similar fate probably befell the Amber Room, made between 1701 and 1709, Schlüter's most famous work of architecture. In 1713 Schlüter's fame brought him to work for Tsar Peter the Great in Saint Petersburg, where he died of an illness after creating several designs. Together with Johann Friedrich Braunstein, he designed the Grand Palace and Monplaisir Palace in Peterhof Palace Complex. Also the city's oldest building, Kikin Hall, and the reliefs at the Summer Palace are attributed to him. This way he became an important figure of Petrine Baroque. Extant works facade of the Royal Chapel, Gdańsk, 1681 sculptures on the facade of Wilanów Palace, Warsaw, after 1681 sculptures on the pediment of Krasiński Palace, Warsaw, 1682–3, 1689–93 epitaph of Adam Zygmunt Konarski, St. Mary's Cathedral of the Assumption, Frombork near Gdańsk, after 1683 altar and crucifix in church, Węgrów near Warsaw, 1688–90 sepulchral sculptures of the Sobieski family, Zhovkva near Lviv, 1692–93 altar in Czerniaków church, Warsaw, 1690 portrait bishop Jan Małachowski in Wawel Cathedral, Kraków 1693 equestrian statue of Elector Frederick William, courtyard of Charlottenburg Palace, Berlin, 1689–1703, with a copy in the Berlin Bode-Museum amber room (reconstruction) in the Catherine Palace of Tsarskoye Selo near Saint Petersburg, 1701 pulpit, St. Mary's Church, Berlin, 1703 sarcophagi of Friedrich I and Sophia Charlotte, king and queen of Prussia in the Berlin Cathedral References External links Biography, by Heinz Ladendorf, 1935 Article in Morgenpost newspaper dhm.de: Schlüter bio at Zeughaus English site about Kikin's Palace (Mansion House) 1664 births 1714 deaths German Baroque architects Polish Baroque architects Russian Baroque architects 17th-century German architects 18th-century German architects German Baroque sculptors Polish Baroque sculptors Polish male sculptors Ukrainian Baroque sculptors 17th-century German sculptors 18th-century German sculptors German male sculptors 17th-century Russian sculptors 18th-century Russian sculptors Russian male sculptors Artists from Gdańsk Architects from Hamburg People from Royal Prussia

2822

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

Ash

Ash or ashes are the solid remnants of fires. Specifically, ash refers to all non-aqueous, non-gaseous residues that remain after something burns. In analytical chemistry, to analyse the mineral and metal content of chemical samples, ash is the non-gaseous, non-liquid residue after complete combustion. Ashes as the end product of incomplete combustion are mostly mineral, but usually still contain an amount of combustible organic or other oxidizable residues. The best-known type of ash is wood ash, as a product of wood combustion in campfires, fireplaces, etc. The darker the wood ashes, the higher the content of remaining charcoal from incomplete combustion. The ashes are of different types. Some ashes contain natural compounds that make soil fertile. Others have chemical compounds that can be toxic but may break up in soil from chemical changes and microorganism activity. Like soap, ash is also a disinfecting agent (alkaline). The World Health Organization recommends ash or sand as alternative when soap is not available. Natural occurrence Ash occurs naturally from any fire that burns vegetation, and may disperse in the soil to fertilise it, or clump under it for long enough to carbonise into coal. Specific types Wood ash Products of coal combustion Bottom ash Fly ash Cigarette or cigar ash Incinerator bottom ash, a form of ash produced in incinerators Ashes and dried bone fragments, or "cremains", left from cremation Volcanic ash, ash that consists of fragmented glass, rock, and minerals that appears during an eruption. See also Ash (analytical chemistry) Cinereous, consisting of ashes, ash-colored or ash-like Potash, a term for many useful potassium salts that traditionally derived from plant ashes, but today are typically mined from underground deposits coal, consisting of carbon as ash, and ash can be converted into coal carbon, basic component of ashes References Combustion

2823

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

Antiderivative

In calculus, an antiderivative, inverse derivative, primitive function, primitive integral or indefinite integral of a function is a differentiable function whose derivative is equal to the original function . This can be stated symbolically as . The process of solving for antiderivatives is called antidifferentiation (or indefinite integration), and its opposite operation is called differentiation, which is the process of finding a derivative. Antiderivatives are often denoted by capital Roman letters such as and . Antiderivatives are related to definite integrals through the fundamental theorem of calculus: the definite integral of a function over a closed interval where the function is Riemann integrable is equal to the difference between the values of an antiderivative evaluated at the endpoints of the interval. In physics, antiderivatives arise in the context of rectilinear motion (e.g., in explaining the relationship between position, velocity and acceleration). The discrete equivalent of the notion of antiderivative is antidifference. Examples The function is an antiderivative of , since the derivative of is , and since the derivative of a constant is zero, will have an infinite number of antiderivatives, such as , etc. Thus, all the antiderivatives of can be obtained by changing the value of in , where is an arbitrary constant known as the constant of integration. Essentially, the graphs of antiderivatives of a given function are vertical translations of each other, with each graph's vertical location depending upon the value . More generally, the power function has antiderivative if , and if . In physics, the integration of acceleration yields velocity plus a constant. The constant is the initial velocity term that would be lost upon taking the derivative of velocity, because the derivative of a constant term is zero. This same pattern applies to further integrations and derivatives of motion (position, velocity, acceleration, and so on). Uses and properties Antiderivatives can be used to compute definite integrals, using the fundamental theorem of calculus: if is an antiderivative of the integrable function over the interval , then: Because of this, each of the infinitely many antiderivatives of a given function may be called the "indefinite integral" of f and written using the integral symbol with no bounds: If is an antiderivative of , and the function is defined on some interval, then every other antiderivative of differs from by a constant: there exists a number such that for all . is called the constant of integration. If the domain of is a disjoint union of two or more (open) intervals, then a different constant of integration may be chosen for each of the intervals. For instance is the most general antiderivative of on its natural domain Every continuous function has an antiderivative, and one antiderivative is given by the definite integral of with variable upper boundary: Varying the lower boundary produces other antiderivatives (but not necessarily all possible antiderivatives). This is another formulation of the fundamental theorem of calculus. There are many functions whose antiderivatives, even though they exist, cannot be expressed in terms of elementary functions (like polynomials, exponential functions, logarithms, trigonometric functions, inverse trigonometric functions and their combinations). Examples of these are From left to right, the functions are the error function, the Fresnel function, the sine integral, the logarithmic integral function and Sophomore's dream. For a more detailed discussion, see also Differential Galois theory. Techniques of integration Finding antiderivatives of elementary functions is often considerably harder than finding their derivatives (indeed, there is no pre-defined method for computing indefinite integrals). For some elementary functions, it is impossible to find an antiderivative in terms of other elementary functions. To learn more, see elementary functions and nonelementary integral. There exist many properties and techniques for finding antiderivatives. These include, among others: The linearity of integration (which breaks complicated integrals into simpler ones) Integration by substitution, often combined with trigonometric identities or the natural logarithm The inverse chain rule method (a special case of integration by substitution) Integration by parts (to integrate products of functions) Inverse function integration (a formula that expresses the antiderivative of the inverse of an invertible and continuous function , in terms of the antiderivative of and of ). The method of partial fractions in integration (which allows us to integrate all rational functions—fractions of two polynomials) The Risch algorithm Additional techniques for multiple integrations (see for instance double integrals, polar coordinates, the Jacobian and the Stokes' theorem) Numerical integration (a technique for approximating a definite integral when no elementary antiderivative exists, as in the case of ) Algebraic manipulation of integrand (so that other integration techniques, such as integration by substitution, may be used) Cauchy formula for repeated integration (to calculate the -times antiderivative of a function) Computer algebra systems can be used to automate some or all of the work involved in the symbolic techniques above, which is particularly useful when the algebraic manipulations involved are very complex or lengthy. Integrals which have already been derived can be looked up in a table of integrals. Of non-continuous functions Non-continuous functions can have antiderivatives. While there are still open questions in this area, it is known that: Some highly pathological functions with large sets of discontinuities may nevertheless have antiderivatives. In some cases, the antiderivatives of such pathological functions may be found by Riemann integration, while in other cases these functions are not Riemann integrable. Assuming that the domains of the functions are open intervals: A necessary, but not sufficient, condition for a function to have an antiderivative is that have the intermediate value property. That is, if is a subinterval of the domain of and is any real number between and , then there exists a between and such that . This is a consequence of Darboux's theorem. The set of discontinuities of must be a meagre set. This set must also be an F-sigma set (since the set of discontinuities of any function must be of this type). Moreover, for any meagre F-sigma set, one can construct some function having an antiderivative, which has the given set as its set of discontinuities. If has an antiderivative, is bounded on closed finite subintervals of the domain and has a set of discontinuities of Lebesgue measure 0, then an antiderivative may be found by integration in the sense of Lebesgue. In fact, using more powerful integrals like the Henstock–Kurzweil integral, every function for which an antiderivative exists is integrable, and its general integral coincides with its antiderivative. If has an antiderivative on a closed interval , then for any choice of partition if one chooses sample points as specified by the mean value theorem, then the corresponding Riemann sum telescopes to the value . However if is unbounded, or if is bounded but the set of discontinuities of has positive Lebesgue measure, a different choice of sample points may give a significantly different value for the Riemann sum, no matter how fine the partition. See Example 4 below. Some examples See also Antiderivative (complex analysis) Formal antiderivative Jackson integral Lists of integrals Symbolic integration Area Notes References Further reading Introduction to Classical Real Analysis, by Karl R. Stromberg; Wadsworth, 1981 (see also) Historical Essay On Continuity Of Derivatives by Dave L. Renfro External links Wolfram Integrator — Free online symbolic integration with Mathematica Mathematical Assistant on Web — symbolic computations online. Allows users to integrate in small steps (with hints for next step (integration by parts, substitution, partial fractions, application of formulas and others), powered by Maxima Function Calculator from WIMS Integral at HyperPhysics Antiderivatives and indefinite integrals at the Khan Academy Integral calculator at Symbolab The Antiderivative at MIT Introduction to Integrals at SparkNotes Antiderivatives at Harvy Mudd College Integral calculus Linear operators in calculus

2824

https://en.wikipedia.org/wiki/Alphabet%20song

Alphabet song

An alphabet song is any of various songs used to teach children an alphabet. Alphabet songs typically recite the names of all letters of the alphabet of a given language in order. The A.B.C. (Verse 1) "The A.B.C." or "A.B.Cs" is one of the best-known English language alphabet songs, and perhaps the one most frequently referred to as "the alphabet song", especially in the United States. The song was first copyrighted in 1835 by the Boston-based music publisher Charles Bradlee, and given the title "The A.B.C., a German air with variations for the flute with an easy accompaniment for the piano forte". The musical arrangement was attributed to Louis Le Maire (sometimes Lemaire), an 18th-century composer. This was "Entered according to act of Congress, in the year 1835, by C. Bradlee, in the clerk's office of the District Court of Massachusetts", according to the Newberry Library, which also says, "The theme is that used by Mozart for his piano variations, Ah, vous dirai-je, maman." This tune is the same as the tune for "Twinkle, Twinkle, Little Star" and similar to that of "Baa, Baa, Black Sheep". Lyrics: (each line represents two measures, or eight beats) A, B, C, D, E, F, G... () H, I, J, K, L, M, N, O, P... (; "L, M, N, O" spoken twice as quickly as rest of rhyme) Q, R, S.../ T, U, V... (; pause between S and T, though in some variants, "and" is inserted) W... X.../ Y and(/&) Z. (; pause between X and Y, and W and X last for two beats) Now I know my ABCs Next time, won't you sing with me? Due to the speed at which 'L, M, N, O, P' is spoken it is a common misconception among children still learning the alphabet to believe that it is in fact its own letter called 'elemenopee' (among other variations). Some have proposed teaching slower versions of the song to avoid this issue. Backwards alphabet This is a version that goes Z to A instead of A to Z. z-y-x, w v-u-t, s-r-q p-o-n-m-l-k-j i-h-g-f-e-d-c-b-a Now you know your ZYXs I bet that's not what you expected! The e-d-c-b part is as fast as the l-m-n-o part in the normal alphabet song. Zed for Zee In the United States, Z is pronounced zee; in most other English-speaking countries (such as the UK, Canada and Australia) it is pronounced zed. Generally, the absent zee-rhyme is not missed, although some children use a zee pronunciation in the rhyme which they would not use elsewhere. Variants of the song exist to accommodate the zed pronunciation. One variation shortens the second line and lengthens the last, to form a near rhyme between N and zed: a-b-c-d-e-f-g h-i-j-k-l-m-n o-p-q-r-s-t-u v-w-x-y-z(ed) French Canadian version A French-language version of the song is also taught in Canada, with generally no alterations to the melody except in the final line that requires adjustment to accommodate the two-syllable pronunciation of the French y. Phonics songs Because the English language has more than 40 sounds and only 26 letters, children and beginning readers also need to learn the different sounds (or phonemes) associated with each letter. Many songs have been written to teach phonemic awareness and they are usually referred to as alphabet songs. Acrostic songs There are also songs that go through the alphabet, making some of the letters stand for something in the process. An example, "'A' You're Adorable" (also known as "The Alphabet Love Song"), was recorded in 1948, by Buddy Kaye, Fred Wise, Sidney Lippman, and later Perry Como. A newer example of this is from the musical Matilda. "School Song" is an acrostic that spells out the alphabet phonetically. Backwards song (Verse 2) The group Wee Sing released an alphabet song with the letters in reverse order, called "ZYXs". The Canadian children's TV series The Big Comfy Couch used a version of the song in the first episode of Season 4, "Backwards". Comedian Soupy Sales released a song in 1966 called "Backwards Alphabet" which contained the reverse alphabet in lyrical style. The original version of the song was performed by actress Judi Rolin with the Smothers Brothers in the 1966 teleplay adaptation of Alice Through the Looking Glass. See also Related English language songs "ABC–DEF–GHI", an alphabet song sung by Big Bird of Sesame Street "ABC Kids", an alternate song sung by The Wiggles who promoted ABC for Kids (2006) "Elmo's Rap Alphabet", a rap version of the alphabet song rapped by Elmo. (1996) "Al'z A–B–Cee'z", an alphabet song by hip hop group 3rd Bass, on their album Derelicts of Dialect (1991) "Crazy ABCs", an alphabet rap song that combines pronunciation and phonetics for each letter by Every Child Wins "Crazy ABC's", an acrostic song listing words beginning with each letter used as a silent letter, by the Barenaked Ladies on their album Snacktime! (2008) "Do-Re-Mi", a show tune from The Sound of Music (1959), used to teach the order of the notes in the Solfege scale "Swingin' the Alphabet", a phonetically based novelty song, popularized by The Three Stooges in the film Violent Is the Word for Curly (1938) "ZYX", a backwards alphabet song by They Might Be Giants, on their second children's album Here Come the ABCs (2005) "The Elements", a mnemonic song of the periodic table by Tom Lehrer (1959) "A.B.C. Rock", written by members of Bill Haley and His Comets and recorded by children's entertainer Sally Starr for her 1958 album Our Gal Sal. Aimed at young listeners, the song incorporates a recitation of the alphabet. Haley and the Comets recorded their own version for Decca Records in 1959. Traditional alphabet songs in other languages "A Haka Mana" recites the syllabary of the Māori language to the tune of Stupid Cupid "Alef-Bet" by Debbie Friedman, a song commonly used in American Hebrew school classrooms to teach the letters of the Hebrew alphabet "Iroha", a recital of the Japanese syllabary "Shiva Sutra", Sanskrit "Thousand Character Classic", Chinese and Korean Hanja "Ganada" (), Korean Hangul "Zengő ABC" by Ferenc Móra, Hungarian "Алфавит мы уже знаем", Russian "Adalama" ( A, da, la, ma...), devised for Fulani speakers in West Africa to memorise the Adlam script. There are several recordings of the Cherokee syllabary with this melody. A singable version for memorising the Déné/Carrier syllabics chart. References Songs about language Children's songs Early childhood education Song